UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

   CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

                  Investment Company Act file number 811-22022
                                                     ---------

           Advent/Claymore Global Convertible Securities & Income Fund
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               (Exact name of registrant as specified in charter)


                 1065 Avenue of the Americas, New York, NY 10018
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               (Address of principal executive offices) (Zip code)

                             Robert White, Treasurer
                 1065 Avenue of the Americas, New York, NY 10018
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                     (Name and address of agent for service)

       Registrant's telephone number, including area code: (212) 479-0675
                                                           --------------

                       Date of fiscal year end: October 31
                                                ----------

                    Date of reporting period: April 30, 2008
                                              --------------

Form N-CSR is to be used by management investment companies to file reports with
the Commission not later than 10 days after the transmission to stockholders of
any report that is required to be transmitted to stockholders under Rule 30e-1
under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may
use the information provided on Form N-CSR in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR,
and the Commission will make this information public. A registrant is not
required to respond to the collection of information contained in Form N-CSR
unless the Form displays a currently valid Office of Management and Budget
("OMB") control number. Please direct comments concerning the accuracy of the
information collection burden estimate and any suggestions for reducing the
burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW,
Washington, DC 20549-0609. The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. ss. 3507.



ITEM 1. REPORTS TO STOCKHOLDERS.

The registrant's semi-annual report transmitted to shareholders pursuant to Rule
30e-1 under the Investment Company Act of 1940 is as follows:

   SHAREHOLDER
        LETTER
April 30, 2008
   (Unaudited)

                             Advent/Claymore
                          Global Convertible    |   AGC
                    Securities & Income Fund



               www.adventclaymore.com
       ... YOUR BRIDGE TO THE LATEST,
MOST UP-TO-DATE INFORMATION ABOUT THE
   ADVENT/CLAYMORE GLOBAL CONVERTIBLE
             SECURITIES & INCOME FUND



The shareholder report you are reading right now is just the beginning of the
story. Online at WWW.ADVENTCLAYMORE.COM, you will find:

o    Daily, weekly and monthly data on share prices, net asset values,
     distributions, dividends and more

o    Portfolio overviews and performance analyses

o    Announcements, press releases and special notices

o    Fund and adviser contact information

Advent Capital Management and Claymore are continually updating and expanding
shareholder information services on the Fund's website, in an ongoing effort to
provide you with the most current information about how your Fund's assets are
managed, and the results of our efforts. It is just one more small way we are
working to keep you better informed about your investment in the Fund.


2 | Letter to Shareholders | April 30, 2008 | www.adventclaymore.com



AGC | Advent/Claymore Global Convertible Securities & Income Fund


Photo of: Tracy V. Maitland

Tracy V. Maitland
President and Chief Executive Officer


Dear SHAREHOLDER |


We thank you for your investment in the Advent/Claymore Global Convertible
Securities & Income Fund (the "Fund"). This report covers the Fund's performance
for the semi-annual period ended April 30, 2008.

As you may know, the Fund's investment objective is to provide total return
through a combination of capital appreciation and current income. Under normal
market conditions, the Fund will invest at least 50% of its managed assets in
convertible securities; the Fund may invest up to 40% of its managed assets in
lower-grade non-convertible income securities, and the Fund will invest at least
50% of its managed assets in foreign securities. As of April 30, 2008,
securities of issuers headquartered outside the U.S. represented 57.5% of
long-term investments, and convertible securities represented 64.2% of the
portfolio.

All Fund returns cited--whether based on net asset value ("NAV") or market
price--assume the reinvestment of all distributions. For the six-month period
ending April 30, 2008, the Fund provided a total return based on market price of
-8.82% and a return of -13.25% based on NAV. As of April 30, 2008, the Fund's
market price of $14.40 represented a discount of 9.55% to the Fund's NAV of
$15.92.

The Fund currently implements its leverage strategy through the issuance of
Auction Market Preferred Shares ("AMPS"). The broad auction-rate preferred
securities market has experienced considerable disruption in the past few
months, and your Fund was not immune to this disruption. As a result, the
auctions for nearly all auction-rate preferred shares, including AMPS such as
those issued by the Fund, have failed. We believe that this increase in failed
auctions is simply a liquidity issue. Investors need to be aware that a failed
auction is not a default, nor does it require the redemption of a fund's
auction-rate preferred shares. Provisions in the offering documents of the
Fund's AMPS provide a mechanism to set a maximum rate in the event of a failed
auction, and, thus, investors will continue to be entitled to receive payment
for holding these AMPS. This maximum rate is determined based upon a multiple of
or a spread to LIBOR, whichever is greater. The Fund has two seven day series of
AMPS, Series T7, which auctions each Tuesday, and Series W7, which auctions each
Wednesday. Recent maximum rates established were 3.56% for Series T7 (auction
date 5/27/08) and 3.61% for Series W7 (auction date 5/28/08). These maximum
rates are not significantly different from, and in many cases are lower than,
past successful auctions. We will continue to evaluate the benefits and impacts
of leverage on the Fund as well as explore other methods of utilizing leverage.

The Fund has paid a monthly dividend of $0.1458 per share starting with its
first dividend in August 2007. This monthly dividend represents an annualized
distribution rate of 12.15%, based on the Fund's closing market price of $14.40
on April 30, 2008. There is no guarantee of any future distributions or that the
current returns and distribution rate will be achieved in the future.



            Letter to Shareholders | April 30, 2008 | www.adventclaymore.com | 3



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
DEAR SHAREHOLDER continued


We encourage shareholders to consider the opportunity to reinvest their
distributions from the Fund through the Dividend Reinvestment Plan ("DRIP"),
which is described in detail on page 20 of the Fund's semi-annual report. When
shares trade at a discount to NAV, the DRIP takes advantage of the discount by
reinvesting the monthly dividend distribution in common shares of the Fund
purchased in the market at a price less than NAV. Conversely, when the market
price of the Fund's common shares is at a premium above NAV, the DRIP reinvests
participants' dividends in newly-issued common shares at NAV, subject to an IRS
limitation that the purchase price cannot be more than 5% below the market price
per share. The DRIP provides a cost-effective means to accumulate additional
shares and enjoy the benefits of compounding returns over time. Since the Fund
endeavors to maintain a steady monthly distribution rate, the DRIP plan
effectively provides an income averaging technique, which causes shareholders to
accumulate a larger number of Fund shares when the market price is depressed
than when the price is higher.

The Fund is managed by a team of experienced and seasoned professionals led by
myself in my capacity as Chief Investment Officer (as well as President and
Founder) of Advent Capital Management, LLC. We encourage you to read the
following Questions & Answers section, which provides more information about the
factors that impacted the Fund's performance.

We thank you for your investment in the Fund and we are honored that you have
chosen the Advent/Claymore Global Convertible Securities & Income Fund as part
of your investment portfolio. For the most up-to-date information on your
investment, please visit the Fund's website at www.adventclaymore.com.

Sincerely,

/s/ Tracy V. Maitland

Tracy V. Maitland

President and Chief Executive Officer
of the Advent/Claymore Global Convertible Securities & Income Fund

May 30, 2008



4 | Letter to Shareholders | April 30, 2008 | www.adventclaymore.com



AGC | Advent/Claymore Global Convertible Securities & Income Fund


QUESTIONS & ANSWERS |

Advent/Claymore Global Convertible Securities & Income Fund (the "Fund") is
managed by a team of seasoned professionals at Advent Capital Management, LLC
("Advent"), led by Tracy V. Maitland, Advent's President and Chief Investment
Officer. In the following interview, Mr. Maitland discusses the global
convertible securities and high-yield markets and the performance of the Fund
during the semi-annual period ended April 30, 2008.


--------------------------------------------------------------------------------
WILL YOU REMIND US OF THIS FUND'S OBJECTIVES AND THE WAY IT IS MANAGED?

The Fund's investment objective is to provide total return through a combination
of capital appreciation and current income. Under normal market conditions, the
Fund will invest at least 80% of its managed assets in a diversified portfolio
of convertible securities and non-convertible income-producing securities, each
of U.S. and non-U.S. issuers. Within this general investment policy, the Fund
will follow, under normal market conditions, the following investment
parameters:

o    The Fund will invest at least 50% of its managed assets in convertible
     securities;

o    The Fund may invest up to 40% of its managed assets in non-convertible
     income-producing securities; and

o    The Fund will invest at least 50% of its managed assets in foreign
     securities.

The portion of the Fund's managed assets invested in convertible securities,
non-convertible income-producing securities and foreign securities will vary
from time to time consistent with the Fund's investment objective, changes in
equity prices and changes in interest rates and other economic and market
factors. The Fund may invest in securities of any credit quality, including
securities that are of below investment grade quality; however, under normal
market conditions, the Fund will maintain a minimum weighted average portfolio
rating of investment grade with respect to the portion of the Fund's managed
assets invested in convertible securities.

In furtherance of the Fund's investment objective, the Fund intends to engage in
an option strategy of writing (selling) covered call options on up to 25% of the
securities held in the Fund's portfolio, to seek to generate current gains from
option premiums as a means to help enhance distributions payable to the holders
of common shares.

The Fund currently uses financial leverage through the issuance of preferred
shares. It may also use financial leverage through borrowing or the issuance of
commercial paper or other forms of debt, through reverse repurchase agreements,
dollar rolls or similar transactions or through a combination of the foregoing
(collectively, "Financial Leverage"). The aggregate amount of Financial Leverage
will not exceed 33(1)/3% of the Fund's managed assets. The Fund may also borrow
in excess of such limit for temporary purposes such as the settlement of
transactions.


--------------------------------------------------------------------------------
PLEASE TELL US ABOUT THE ECONOMIC AND MARKET ENVIRONMENT OVER THE LAST SIX
MONTHS.

The six-month period from October 31, 2007, through April 30, 2008, was a period
of considerable economic uncertainty and significant turmoil throughout most
world capital markets. The global economy faces increased risks from a spreading
housing market slump that began in the U. S., a broadly-based tightening of
credit conditions and a renewed surge in energy prices.

Few regions are likely to escape unscathed. Credit conditions have tightened
around the world, housing markets are stretched, and a slowdown in U.S. import
demand has effected many nations. The slowdown is likely to be most pronounced
in the U.S., less so in


            Letter to Shareholders | April 30, 2008 | www.adventclaymore.com | 5



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
QUESTIONS & ANSWERS continued


Europe and Japan, and least in emerging economies such as India and China.

Inflation risks persist, especially in emerging economies vulnerable to rising
commodity prices. However, inflation pressures may ease globally as weaker
demand reduces strains on resource utilization and commodity markets.

In this challenging economic environment, most U.S. and international equity
indices posted negative returns. In the U.S., treasury securities provided
higher returns than other asset classes, as investors became increasingly
uncomfortable with risk.


--------------------------------------------------------------------------------
HOW DID THE FUND PERFORM IN THIS ENVIRONMENT?

All Fund returns cited--whether based on net asset value ("NAV") or market
price--assume the reinvestment of all distributions. For the six-month period
ending April 30, 2008, the Fund provided a total return based on market price of
-8.82% and a return of -13.25% based on NAV. As of April 30, 2008, the Fund's
market price of $14.40 represented a discount of 9.55% to the Fund's NAV of
$15.92.

For NAV performance comparison purposes, the Standard & Poor's 500 Index ("S&P
500"), which is considered a common indicator of broad U.S. stock market
performance, returned -9.64% for the six-month period. The MSCI World Index,
which tracks performance of equity markets throughout the world, posted a return
of -9.06%. The Merrill Lynch All Convertibles Index, which tracks performance of
the U.S. market for convertible securities, returned -5.26%. The Merrill Lynch
High Yield Master II Index, which is a measure of the broad high yield market,
returned -0.77%.

As most investors may know, the market value of the Fund's shares fluctuates
from time to time, and it may be higher or lower than the Fund's NAV. The
current discount to NAV may provide an opportunity for suitable investors to
purchase shares of the Fund below the market value of the securities in the
underlying portfolio. We believe that, over the long term, the progress of the
NAV will be reflected in the market price return to shareholders.


--------------------------------------------------------------------------------
HOW DID YOU ALLOCATE THE FUND AMONG ASSET CLASSES OVER THE LAST SIX MONTHS?

As of April 30, 2008, the portfolio consisted of 64.2% convertible securities,
14.5% equities and 9.0% high yield securities. Additionally, the Fund has
exposure to bank loans of 10.9% through total return swap positions. Although
much of the portfolio performed well relative to the relevant markets, asset
allocation decisions, most specifically the allocation to bank loans, were a
major cause of the deterioration in the Fund's NAV over this period.

Although it represented just over 10% of the Fund's net assets through most of
the six-month period, the Fund's bank loan exposure was a major detractor from
the Fund's performance. The bank loan market, which historically has experienced
very low volatility, became volatile during this period. We initially invested
in bank loans soon after the Fund was established in May 2007 because we
believed these loans represented a reliable source of the income to help support
the Fund's distribution. In these total return swaps, the Fund pays a small
amount up front or a fixed percentage of the coupon during the life of the swap,
and in exchange receives the total return of the underlying bank loan. Because
they require a small capital outlay and deliver the return of an underlying
asset, these swaps can be considered to create leverage, increasing the
volatility of a portfolio, both the upside and the downside. During this
six-month period, use of these swaps on the bank loan portion of the portfolio
amplified the downside volatility and was a major cause of the drop in the
Fund's NAV. It is important to understand that the bank loans the Fund has
exposure to are considered to be very high quality, and are generally backed by
corporate assets, with minimal credit risk; the drop in the value of these loans
we believe was a matter of market dislocation, with supply vastly exceeding
demand. We have seen a major recovery in the bank loan market in March and
April, and we anticipate further appreciation in the value of these assets.

Additionally, because of the Fund's global mandate, the portfolio management
team has made significant use of synthetic convertible securities. We often
create synthetic convertibles in order to gain the desired exposure to global
companies we feel are attractive that don't offer existing convertibles with the
yield or credit rating appropriate for the Fund. In this case, synthetic
convertible securities are typically structured similar to convertible preferred
shares, offering attractive yields as well as upside potential. An increase in
overall market volatility over the past six months hurt pricing of the synthetic
convertibles in the portfolio, as these securities tend to perform better in
less volatile markets.

Over the past few months we have increased the allocation to high yield
securities, taking advantage of dislocations in the credit


6 | Letter to Shareholders | April 30, 2008 | www.adventclaymore.com



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
QUESTIONS & ANSWERS continued


markets. High yield bonds represented 9.0% of the portfolio as of April 30,
2008, up from 6.4% as of October 31, 2007. We have taken advantage of falling
prices of good quality high yield bonds, which we believe represent excessive
fear of risk on the part of investors. At recent prices, the bonds offer
attractive yields, and we believe that many of the bonds we purchased have the
potential for significant capital appreciation as well. Many new issues have
come on the market with very favorable terms for buyers; accordingly, we have
sold some older bonds that were priced close to par and purchased new issues of
good quality and favorable terms. Rigorous credit research is an important
element of security selection for this Fund, and Advent's proprietary credit
research emphasizes cash flow and balance sheets. We focus on the higher-quality
segment of the high yield bond market, avoiding those bonds that we feel are
more likely to default. Most of the increase in high yield bonds has been
balanced by a reduction in the equity position; the high current yields on
convertible securities reduce the appeal of straight equities.

In recent months we increased the Fund's currency hedge, as the euro and the yen
began to appear overpriced, and it started to seem likely that the dollar might
strengthen. We have increased the hedge on the British pound sterling relative
to the dollar, based on concerns about the British housing market and economy.


--------------------------------------------------------------------------------
WHICH INDUSTRY GROUPS AND HOLDINGS CONTRIBUTED MOST TO THE FUND'S PERFORMANCE?

Two areas that performed quite well were energy and agriculture. A position that
contributed significantly is a convertible preferred of Chesapeake Energy
Corporation (0.5% of long-term investments), a natural gas producer. It's a
company with steady growth in revenue and income, high profitability, good
return on equity, and a sound management group that own a lot of stock
themselves. The stock is up significantly since the end of October, benefiting
from rising energy prices, and we believe it has continued upside potential.
Another energy position that performed well was Peabody Energy Corporation (1.2%
of long-term investments), a leading coal company. This is the kind of company
we particularly like, with good cash flow, strong balance sheet, solid franchise
value and pricing power.

Another holding that continued to perform well was Calyon Financial Products,
Ser. Xstrata PLC (1.9% of long-term investments). This global mining company is
truly global: it is headquartered in Switzerland, trades in the London market,
and issues financial reports in U.S. dollars. We favor this company not only for
its strong positions in coal, copper, aluminum and other metals but also because
of its strong balance sheet and cash flow generation.

A position that has performed well is the Fund's largest holding, Eksportfinans
A/S, Ser. ABB Ltd. (3.0% of long-term investments), a global provider of power
and automation technologies to utility and industry customers. This company has
great exposure to emerging market infrastructure; the stock trades at a low
multiple of earnings, largely because of some past problems that we believe have
been resolved.

--------------------------------------------------------------------------------
WHICH DECISIONS HURT PERFORMANCE?

A significant negative was drug producer Schering-Plough Corporation (1.8% of
long-term investments); we feel we own a good quality convertible with an
attractive yield. This stock dropped on publicity surrounding Vytorin, a
cholesterol-lowering drug. A recent panel indicated that Vytorin may not have
the previously presumed advantages over a combination of generic drugs. As a
result, it now appears that Vytorin may not be the growth engine it was
previously hoped to be. We continue to hold Schering-Plough, as we believe
trends are not as negative as the current market price suggest; we believe that
the company has other sources of growth, including the recent acquisition of
Organon International.

Also negative was KBC Financial Products, Ser. Siemens AG (1.8% of long-term
investments), a German engineering conglomerate. The company has been under a
cloud from a bribery scandal, but it has a respected new management team that is
undertaking a restructuring effort that we believe will prove effective.



--------------------------------------------------------------------------------
HOW HAS THE FUND'S LEVERAGE STRATEGY AFFECTED PERFORMANCE?

The Fund utilizes Financial Leverage (borrowing) as part of its investment
strategy, to finance the purchase of additional securities that helps provide
increased income and potentially greater appreciation potential to common
shareholders than could be achieved from a portfolio that is not leveraged. The
Fund currently implements its Financial Leverage strategy through the issuance
of Auction Market Preferred Shares ("AMPS").


            Letter to Shareholders | April 30, 2008 | www.adventclaymore.com | 7



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
QUESTIONS & ANSWERS continued


The broad auction-rate preferred securities market has experienced considerable
disruption in the past few months, and your Fund was not immune to this
disruption. As a result, the auctions for nearly all auction-rate preferred
shares, including AMPS such as those issued by the Fund, have failed. We believe
that this increase in failed auctions is simply a liquidity issue. Investors
need to be aware that a failed auction is not a default, nor does it require the
redemption of a fund's auction-rate preferred shares. Provisions in the offering
documents of the Fund's AMPS provide a mechanism to set a maximum rate in the
event of a failed auction, and, thus, investors will continue to be entitled to
receive payment for holding these AMPS. This maximum rate is determined based
upon a multiple of or a spread to LIBOR, whichever is greater. The Fund has two
seven day series of AMPS, Series T7, which auctions each Tuesday, and Series W7,
which auctions each Wednesday. The recent maximum rates established were 3.56%
for Series T7 (auction date 5/27/08) and 3.61% for Series W7 (auction date
5/28/08). These maximum rates are not significantly different from, and in many
cases are lower than, past successful auctions. We will continue to evaluate the
benefits and impacts of leverage on the Fund as well as explore other methods of
utilizing leverage.

There is no guarantee that the Fund's leverage strategy will be successful, and
the Fund's use of leverage may cause the Fund's NAV and market price of common
shares to be more volatile. Leverage adds value only when the return on
securities purchased exceeds the cost of leverage. Since the portfolio's total
return was negative during this period, the effect of leverage was negative.
Also, as discussed above, the use of total return swaps on bank loans can be
considered to create another form of leverage, and this also detracted from
performance.


--------------------------------------------------------------------------------
WHAT IS YOUR CURRENT OUTLOOK FOR THE MARKETS AND THE FUND?

A major advantage of this Fund is its ability to invest in multiple asset
classes, taking advantage of different opportunities and anomalies in various
markets. As mentioned above, we were able to take advantage of dislocations in
U.S., credit markets over the last few months, buying quality debt securities at
very attractive prices.

At present, as financial markets continue to experience turmoil, we see many
opportunities in the convertible market. Very high quality financial
institutions are issuing high coupon bonds and preferreds as they seek to
rebuild their balance sheets or make acquisitions, and we have taken advantage
of the opportunity to invest on some of these securities. They may not recover
quickly, but we have the ability to hold them for several years, collecting
attractive yields in the meantime.

With so many potential investments, including equities, options, convertibles,
synthetic convertibles, investment-grade corporate bonds and high-yield bonds,
we are nearly always able to find good investment opportunities that are
consistent with this Fund's objectives and strategy. We believe that, over the
long term, our careful security selection and asset allocation will help the
Fund's performance by providing favorable returns in rising markets and a level
of income that can help provide some protection for overall return against down
markets.


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AGC | Advent/Claymore Global Convertible Securities & Income Fund |
QUESTIONS & ANSWERS continued


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AGC RISKS AND OTHER CONSIDERATIONS

The views expressed in this report reflect those of the Portfolio Managers only
through the report period as stated on the cover. These views are subject to
change at any time, based on market and other conditions and should not be
construed as a recommendation of any kind. The material may also contain
forward-looking statements that involve risk and uncertainty, and there is no
guarantee they will come to pass. There can be no assurance that the Fund will
achieve its investment objectives. The value of the Fund will fluctuate with the
value of the underlying securities. Historically, closed-end funds often trade
at a discount to their net asset value. The Fund is subject to investment risk,
including the possible loss of the entire amount that you invest. Past
performance does not guarantee future results.

CONVERTIBLE SECURITIES. The Fund is not limited in the percentage of its assets
that may be invested in convertible securities. Convertible securities generally
offer lower interest or dividend yields than non-convertible securities of
similar quality. The market values of convertible securities tend to decline as
interest rates increase and, conversely, to increase as interest rates decline.
However, the convertible security's market value tends to reflect the market
price of the common stock of the issuing company when that stock price is
greater than the convertible's ``conversion price, '' which is the predetermined
price at which the convertible security could be exchanged for the associated
stock.

STRUCTURED AND SYNTHETIC CONVERTIBLE SECURITIES RISK. The value of structured
convertible securities can be affected by interest rate changes and credit risks
of the issuer. Such securities may be structured in ways that limit their
potential for capital appreciation and the entire value of the security may be
at a risk of loss depending on the performance of the underlying equity
security. Structured convertible securities may be less liquid than other
convertible securities. The value of a synthetic convertible security will
respond differently to market fluctuations than a convertible security because a
synthetic convertible security is composed of two or more separate securities,
each with its own market value. In addition, if the value of the underlying
common stock or the level of the index involved in the convertible component
falls below the exercise price of the warrant or option, the warrant or option
may lose all value.

INTEREST RATE RISK. Convertible securities and non-convertible income producing
securities are subject to certain risks, including (i) if interest rates go up,
the value of convertible securities and non-convertible income-producing
securities in the Fund's portfolio generally will decline; (ii) during periods
of declining interest rates, the issuer of a security may exercise its option to
prepay principal earlier than scheduled, forcing the Fund to reinvest in lower
yielding securities (call or prepayment risk); and (iii) during periods of
rising interest rates, the average life of certain types of securities may be
extended because of slower than expected principal payments (extension risk).

CREDIT RISK. Credit risk is the risk that one or more securities in the Fund's
portfolio will decline in price, or fail to pay interest or principal when due,
because the issuer of the security experiences a decline in its financial
status. The Fund's investments in convertible and non-convertible debt
securities involve credit risk. However, in general, lower rated securities
carry a greater degree of risk that the issuer will lose its ability to make
interest and principal payments, which could have a negative impact on the
Fund's net asset value or dividends.

LOWER GRADE SECURITIES RISKS. Investing in lower grade securities (commonly
known as "junk bonds") involves additional risks, including credit risk. Credit
risk is the risk that one or more securities in the Fund's portfolio will
decline in price, or fail to pay interest or principal when due, because the
issuer of the security experiences a decline in its financial status.

PREFERRED SECURITIES RISKS. There are special risks associated with investing in
preferred securities, including risks related to deferral, noncumulative
dividends, subordination, liquidity, limited voting rights and special
redemption rights.

FOREIGN SECURITIES AND EMERGING MARKETS RISK. Investing in non-U.S. issuers may
involve unique risks, such as currency, political, economic and market risk. In
addition, investing in emerging markets entails additional risk including, but
not limited to (1) news and events unique to a country or region (2) smaller
market size, resulting in lack of liquidity and price volatility (3) certain
national policies which may restrict the Fund's investment opportunities.

SMALLER COMPANY RISK. The general risks associated with corporate
income-producing and equity securities are particularly pronounced for
securities issued by companies with smaller market capitalizations. These
companies may have limited product lines, markets or financial resources, or
they may depend on a few key employees. As a result, they may be subject to
greater levels of credit, market and issuer risk. Securities of smaller
companies may trade less frequently and in lesser volume than more widely held
securities and their values may fluctuate more sharply than other securities.
Companies with medium-sized market capitalizations may have risks similar to
those of smaller companies.

RISK ASSOCIATED WITH THE FUND'S COVERED CALL OPTION WRITING STRATEGY. The
ability of the Fund to achieve its investment objective of providing total
return through a combination of current income and capital appreciation is
partially dependent on the successful implementation of its covered call option
strategy. There are significant differences between the securities and options
markets that could result in an imperfect correlation between these markets,
causing a given transaction not to achieve its objectives. A decision as to
whether, when and how to use options involves the exercise of skill and
judgment, and even a well conceived transaction may be unsuccessful to some
degree because of market behavior or unexpected events. As the writer of a
covered call option, the Fund forgoes, during the option's life, the opportunity
to profit from increases in the market value of the security covering the call
option above the sum of the premium and the strike price of the call, but has
retained the risk of loss should the price of the underlying security decline.

LEVERAGE RISK. Certain risks are associated with the leveraging of common stock.
Both the net asset value and the market value of shares of common stock may be
subject to higher volatility and a decline in value.

AUCTION MARKET PREFERRED SHARES (AMPS) RISK. The AMPS are redeemable, in whole
or in part, at the option of the Fund on any dividend payment date for the AMPS,
and are subject to mandatory redemption in certain circumstances. The AMPS are
not listed on an exchange. You may buy or sell AMPS only through an order placed
at an auction with or through a broker-dealer that has entered into an agreement
with the auction agent and the Fund or in a secondary market maintained by
certain broker dealers. These broker-dealers are not required to maintain this
market, and it may not provide you with liquidity.

In addition to the risks described above, the Fund is also subject to: Foreign
Currency Risk, Derivatives Risk, Equity Securities Risk, Counterparty Risk,
Liquidity Risk, REIT, Mortgage-Related and Asset-Backed Securities Risks, Income
Trust and Master Limited Partnership Risks, Dividend Capture Trading Risk,
Reinvestment Risk, Management Risk, Market Disruption Risk, and Anti-Takeover
Provisions. Please see www.adventclaymore.com for a more detailed discussion
about Fund risks and considerations.


            Letter to Shareholders | April 30, 2008 | www.adventclaymore.com | 9



AGC | Advent/Claymore Global Convertible Securities & Income Fund

Fund SUMMARY | AS OF APRIL 30, (2008) (unaudited)

FUND STATISTICS
-------------------------------------------------------
Share Price                                      $14.40
Common Share Net Asset Value                     $15.92
Premium/Discount to NAV                          -9.55%
Net Assets ($000)                              $507,192
-------------------------------------------------------


TOTAL RETURNS
-------------------------------------------------------
(INCEPTION 5/29/07)                MARKET           NAV
-------------------------------------------------------
Six-Month - non-annualized         -8.82%       -13.25%
Since Inception - non-annualized  -21.68%        -9.93%
-------------------------------------------------------


                                         % OF LONG-TERM
TOP TEN INDUSTRIES                          INVESTMENTS
-------------------------------------------------------
Financial Services                                 7.8%
Oil and Gas                                        6.9%
Automotive                                         6.7%
Diversified Metals and Mining                      6.4%
Pharmaceuticals                                    6.2%
Health Care Products and Services                  4.8%
Utilities - Gas and Electric                       4.3%
Retail - Specialty Stores                          4.0%
Chemicals                                          3.7%
Telecommunications                                 3.1%
-------------------------------------------------------


                                         % OF LONG-TERM
TOP TEN ISSUERS                             INVESTMENTS
-------------------------------------------------------
Eksportfinans A/S, Ser. ABB Ltd., 8.000%, 2008
  (Switzerland)                                    3.0%
Bayer Hypo, Ser. Lafarge, A                        2.7%
Suzuki Motor Corp. (Japan)                         2.6%
Shanghai Industrial Holdings Ltd. (Hong Kong)      2.6%
Morgan Stanley, Ser. Komatsu, 8.000%, 2008 (Japan) 2.4%
Hengan International Group Co., Ltd.
  (Cayman Islands)                                 2.4%
Mylan, Inc., 6.500%, 2010                          2.2%
Nabtesco Corp. (Japan)                             2.2%
Allegro Investment Corp. SA, Ser. SABMiller,
   8.000%, 2008 (United Kingdom)                   2.1%
Bayer Capital Corp. BV, BBB                        2.1%
-------------------------------------------------------

                                         % OF LONG-TERM
PORTFOLIO BREAKDOWN BY COUNTRY              INVESTMENTS
-------------------------------------------------------
United States                                     42.5%
Japan                                             11.3%
Canada                                             6.4%
United Kingdom                                     6.3%
Germany                                            6.2%
France                                             5.5%
Switzerland                                        5.0%
China                                              4.7%
Netherlands                                        4.4%
Czech Republic                                     2.0%
Cayman Islands                                     1.7%
Brazil                                             1.2%
Jersey                                             1.1%
Bermuda                                            0.9%
Luxembourg                                         0.7%
Guernsey                                           0.1%
-------------------------------------------------------

Past performance does not guarantee future results. All portfolio data is
subject to change daily. For more current information, please visit
www.claymore.com. The above summaries are provided for informational purposes
only and should not be viewed as recommendations.


Line Chart:
SHARE PRICE & NAV PERFORMANCE
SHARE PRICE          NAV
16.72                19.13
16.63                19.11
16.55                18.99
16.42                19.1
16.09                18.96
15.99                18.87
15.73                18.58
15.7                 18.31
15.66                18.16
15.64                18.3
15.49                18.09
15.45                17.95
15.11                17.49
14.8                 17.56
14.68                17.26
14.98                17.42
14.51                17.39
14.51                17.25
14.89                17.5
14.8                 17.66
15.45                17.84
15.37                17.73
15.44                17.61
15.58                17.69
15.64                17.81
15.71                17.88
15.74                17.97
15.65                17.8
15.43                17.69
15.39                17.47
15.15                17.39
14.75                17.06
14.58                16.99
14.56                16.99
14.58                16.93
14.62                17.22
14.79                17.31
14.9                 17.4
14.8                 17.44
15.1                 17.54
15.3                 17.51
15.44                17.53
15.96                17.45
15.82                17.1
15.64                16.94
15.13                16.85
15.33                16.74
15.6                 16.69
15.28                16.53
15.35                16.69
15.36                16.36
15.38                15.9
14.9                 15.68
14.58                15.53
14.2                 14.99
14.3                 14.99
14.34                15.28
14.26                15.34
14.64                15.23
14.81                15.4
14.69                15.41
14.73                15.53
14.8                 15.98
14.9                 16.01
14.91                15.54
14.9                 15.37
15.06                15.15
14.87                15.09
14.57                15.01
14.67                15.08
14.12                14.94
13.52                15
13.48                15.03
13.5                 15.19
13.58                15.08
13.52                15.27
13.63                15.3
13.94                15.54
14                   15.74
14.24                15.87
14.39                15.84
14.23                15.6
14.39                15.38
14.08                15.23
13.96                15.36
13.79                15.22
13.51                15.02
13.47                14.74
14.05                14.93
13.72                14.85
13.57                14.74
13.24                14.63
12.87                14.15
13                   14.44
12.68                14.23
12.7                 14.16
12.68                14.32
12.89                14.62
13.06                14.72
13.11                14.8
13.21                14.82
13.48                14.74
13.56                14.92
13.55                15.09
13.73                15.16
13.65                15.18
13.73                15.39
13.77                15.3
13.72                15.23
13.66                15.2
13.3                 15.06
13.27                14.99
13.39                15.02
13.63                15.33
13.65                15.35
13.89                15.48
13.79                15.61
13.9                 15.55
13.95                15.62
14.21                15.68
14.26                15.84
14.38                15.92
14.32                15.88
14.4                 15.92

Bar Chart:
Monthly Dividends Per Share
Nov 07               0.1458
Dec                  0.1458
Jan 08               0.1458
Feb                  0.1458
Mar                  0.1458
Apr                  0.1458


Pie Chart:
PORTFOLIO COMPOSITION (% of Total Investments)
Asset Class
-----------
Convertible Bonds               32.5%
Convertible Preferred Stocks    31.7%
Common Stocks                   14.5%
Short Term Investments          11.8%
Corporate Bonds                  9.0%
Exchange Traded Funds            0.5%


10 | Letter to Shareholders | April 30, 2008 | www.adventclaymore.com



AGC | Advent/Claymore Global Convertible Securities & Income Fund

About the INVESTMENT MANAGER |


ADVENT CAPITAL MANAGEMENT, LLC

Advent Capital Management, LLC ("Advent") is a registered investment advisor,
based in New York, which specializes in convertible, equity and high-yield
securities for institutional and individual investors. The firm was established
by Tracy V. Maitland, a former Director in the Convertible Securities sales and
trading division of Merrill Lynch. Advent's investment discipline emphasizes
capital structure research, encompassing equity fundamentals as well as credit
research, with a focus on cash flow and asset values while seeking to maximize
total return.

INVESTMENT PHILOSOPHY

Under normal market conditions, the Fund will invest at least 80% of its Managed
Assets in a diversified portfolio of convertible securities and non-convertible
income-producing securities, each of U.S. are non-U.S. issuers. Within this
general investment policy, the Fund will follow, under normal market conditions,
the following investment partners:

o    the Fund will invest at least 50% of its Managed Assets in convertible
     securities;

o    the Fund will invest up to 40% of its Managed Assets in non-convertible
     income-producing securities; and

o    the Fund will invest at least 50% of its Managed Assets in foreign
     securities.

INVESTMENT PROCESS

Advent manages securities by using a strict four-step process:

1    Screen the equity, convertible and high-yield markets for securities with
     attractive risk/reward characteristics and favorable cash flows;

2    Analyze the quality of issues to help manage downside risk;

3    Analyze fundamentals to identify catalysts for favorable performance; and

4    Continually monitor the portfolio for improving or deteriorating trends in
     the financials of each investment.


           Letter to Shareholders | April 30, 2008 | www.adventclaymore.com | 11



ADVENT CAPITAL MANAGEMENT, LLC
1065 Avenue of the Americas
New York, New York 10018

THIS REPORT IS SENT TO SHAREHOLDERS OF ADVENT/CLAYMORE GLOBAL CONVERTIBLE
SECURITIES & INCOME FUND FOR THEIR INFORMATION. IT IS NOT A PROSPECTUS, CIRCULAR
OR REPRESENTATION INTENDED FOR USE IN THE PURCHASE OR SALE OF SHARES OF THE FUND
OR OF ANY SECURITIES MENTIONED IN THIS REPORT.


                                                                        AGC
                                                                       LISTED
                                                                       NYSE(R)


                                                                     AGC-SL-0408




   SEMI-ANNUAL
        REPORT
April 30, 2008
   (Unaudited)

                             Advent/Claymore
                          Global Convertible  |  AGC
                    Securities & Income Fund


Logo: ADVENT CAPITAL MANAGEMENT

Logo: Claymore(R)



AGC | Advent/Claymore Global Convertible Securities & Income Fund

Fund SUMMARY | AS OF APRIL 30, 2008 (unaudited)

FUND STATISTICS
-------------------------------------------------------
Share Price                                      $14.40
Common Share Net Asset Value                     $15.92
Premium/Discount to NAV                          -9.55%
Net Assets ($000)                              $507,192
-------------------------------------------------------


TOTAL RETURNS
-------------------------------------------------------
(INCEPTION 5/29/07)                MARKET           NAV
-------------------------------------------------------
Six-Month - non-annualized         -8.82%       -13.25%
Since Inception - non-annualized  -21.68%        -9.93%
-------------------------------------------------------

                                         % OF LONG-TERM
TOP TEN INDUSTRIES                          INVESTMENTS
-------------------------------------------------------
Financial Services                                 7.8%
Oil and Gas                                        6.9%
Automotive                                         6.7%
Diversified Metals and Mining                      6.4%
Pharmaceuticals                                    6.2%
Health Care Products and Services                  4.8%
Utilities - Gas and Electric                       4.3%
Retail - Specialty Stores                          4.0%
Chemicals                                          3.7%
Telecommunications                                 3.1%
-------------------------------------------------------

                                         % OF LONG-TERM
TOP TEN ISSUERS                             INVESTMENTS
-------------------------------------------------------
Eksportfinans A/S, Ser. ABB Ltd., 8.000%, 2008
  (Switzerland)                                    3.0%
Bayer Hypo, Ser. Lafarge, A                        2.7%
Suzuki Motor Corp. (Japan)                         2.6%
Shanghai Industrial Holdings Ltd. (Hong Kong)      2.6%
Morgan Stanley, Ser. Komatsu, 8.000%, 2008 (Japan) 2.4%
Hengan International Group Co., Ltd.
  (Cayman Islands)                                 2.4%
Mylan, Inc., 6.500%, 2010                          2.2%
Nabtesco Corp. (Japan)                             2.2%
Allegro Investment Corp. SA, Ser. SABMiller,
  8.000%, 2008 (United Kingdom)                    2.1%
Bayer Capital Corp. BV, BBB                        2.1%
-------------------------------------------------------

                                         % OF LONG-TERM
PORTFOLIO BREAKDOWN BY COUNTRY              INVESTMENTS
-------------------------------------------------------
United States                                     42.5%
Japan                                             11.3%
Canada                                             6.4%
United Kingdom                                     6.3%
Germany                                            6.2%
France                                             5.5%
Switzerland                                        5.0%
China                                              4.7%
Netherlands                                        4.4%
Czech Republic                                     2.0%
Cayman Islands                                     1.7%
Brazil                                             1.2%
Jersey                                             1.1%
Bermuda                                            0.9%
Luxembourg                                         0.7%
Guernsey                                           0.1%
-------------------------------------------------------

Past performance does not guarantee future results. All portfolio data is
subject to change daily. For more current information, please visit
www.claymore.com. The above summaries are provided for informational purposes
only and should not be viewed as recommendations.

Line Chart:
SHARE PRICE & NAV PERFORMANCE
SHAREPRICE        NAV
16.72             19.13
16.63             19.11
16.55             18.99
16.42             19.1
16.09             18.96
15.99             18.87
15.73             18.58
15.7              18.31
15.66             18.16
15.64             18.3
15.49             18.09
15.45             17.95
15.11             17.49
14.8              17.56
14.68             17.26
14.98             17.42
14.51             17.39
14.51             17.25
14.89             17.5
14.8              17.66
15.45             17.84
15.37             17.73
15.44             17.61
15.58             17.69
15.64             17.81
15.71             17.88
15.74             17.97
15.65             17.8
15.43             17.69
15.39             17.47
15.15             17.39
14.75             17.06
14.58             16.99
14.56             16.99
14.58             16.93
14.62             17.22
14.79             17.31
14.9              17.4
14.8              17.44
15.1              17.54
15.3              17.51
15.44             17.53
15.96             17.45
15.82             17.1
15.64             16.94
15.13             16.85
15.33             16.74
15.6              16.69
15.28             16.53
15.35             16.69
15.36             16.36
15.38             15.9
14.9              15.68
14.58             15.53
14.2              14.99
14.3              14.99
14.34             15.28
14.26             15.34
14.64             15.23
14.81             15.4
14.69             15.41
14.73             15.53
14.8              15.98
14.9              16.01
14.91             15.54
14.9              15.37
15.06             15.15
14.87             15.09
14.57             15.01
14.67             15.08
14.12             14.94
13.52             15
13.48             15.03
13.5              15.19
13.58             15.08
13.52             15.27
13.63             15.3
13.94             15.54
14                15.74
14.24             15.87
14.39             15.84
14.23             15.6
14.39             15.38
14.08             15.23
13.96             15.36
13.79             15.22
13.51             15.02
13.47             14.74
14.05             14.93
13.72             14.85
13.57             14.74
13.24             14.63
12.87             14.15
13                14.44
12.68             14.23
12.7              14.16
12.68             14.32
12.89             14.62
13.06             14.72
13.11             14.8
13.21             14.82
13.48             14.74
13.56             14.92
13.55             15.09
13.73             15.16
13.65             15.18
13.73             15.39
13.77             15.3
13.72             15.23
13.66             15.2
13.3              15.06
13.27             14.99
13.39             15.02
13.63             15.33
13.65             15.35
13.89             15.48
13.79             15.61
13.9              15.55
13.95             15.62
14.21             15.68
14.26             15.84
14.38             15.92
14.32             15.88
14.4              15.92

Bar Chart:
MONTHLY DIVIDENDS PER SHARE
Nov 07   0.1458
Dec      0.1458
Jan 08   0.1458
Feb      0.1458
Mar      0.1458
Apr      0.1458


Pie Chart:
PORTFOLIO COMPOSITION (% of Total Investments)

ASSET CLASS
-----------
Convertible Bonds                       32.5%
Convertible Preferred Stocks            31.7%
Common Stocks                           14.5%
Short Term Investments                  11.8%
Corporate Bonds                          9.0%
Exchange Traded Funds                    0.5%

2 | SemiAnnual Report | April 30, 2008


AGC | Advent/Claymore Global Convertible Securities & Income Fund
Portfolio of INVESTMENTSlAPRIL 30, (2008) (unaudited)


PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              LONG-TERM INVESTMENTS - 119.5%

              CONVERTIBLE BONDS - 44.0%

              AIRLINES - 1.1%

$   2,000,000 AMR Corp., B-
              4.50%, 2/15/24                                        $  1,877,500
$   5,300,000 JetBlue Airways Corp., CCC
              3.75%, 3/15/35                                           3,908,750
--------------------------------------------------------------------------------
                                                                       5,786,250
--------------------------------------------------------------------------------
              AUTOMOTIVE - 3.9%
(euro)
    7,400,000 Deutsche Bank AG, Ser. Daimler, NR
              8.00%, 6/20/08 (Germany) (a)(b)                          8,456,458
$  16,250,000 General Motors Corp., Ser. B, B-
              5.25%, 3/06/32                                          11,459,500
--------------------------------------------------------------------------------
                                                                      19,915,958
--------------------------------------------------------------------------------
              AUTO PARTS AND EQUIPMENT - 1.5%
(euro)
    7,000,000 Calyon Financial Products, Ser. Continental AG, NR
              8.00%, 6/18/08 (Germany) (b)                             7,860,944
--------------------------------------------------------------------------------
              BANKING AND FINANCE - 0.8%
$   2,000,000 Boston Private Financial Holdings, Inc., NR
              3.00%, 7/15/27                                           1,792,500
$   3,000,000 National City Corp., A
              4.00%, 2/01/11                                           2,546,250
--------------------------------------------------------------------------------
                                                                       4,338,750
--------------------------------------------------------------------------------
              BIOTECHNOLOGY - 1.1%
$   5,000,000 Genzyme Corp., BBB+
              1.25%, 12/1/23                                           5,568,750
--------------------------------------------------------------------------------
              CHEMICALS - 2.5%
(euro)
    5,500,000 Bayer Capital Corp. BV, BBB
              6.625%, 6/01/09 (Netherlands)                           12,763,077
--------------------------------------------------------------------------------
              COMMERCIAL SERVICES - 2.7%
$  10,000,000 Deutsche Bank AG, Ser. Sinofert Holdings, NR
              8.00%, 12/23/08 (Germany) (a)(b)                         9,362,000
(euro)
    7,000,000 JP Morgan International Derivatives Ltd.,
              Ser. USG People, NR
              8.00%, 6/18/08 (Netherlands) (b)                         4,512,986
--------------------------------------------------------------------------------
                                                                      13,874,986
--------------------------------------------------------------------------------
              CONSUMER STAPLES - 2.6%
$  15,000,000 BNP Paribas SA, Ser. Shanghai Industrial, AA
              9.00%, 10/03/08 (China) (a)(b)                          13,117,500
--------------------------------------------------------------------------------
              DIVERSIFIED METALS AND MINING - 6.3%
(pound)
    5,000,000 Calyon Financial Products, Ser. Xstrata, NR
              8.00%, 6/12/08, (United Kingdom) (b)                    11,638,708
(euro)
    7,500,000 Figaro Finance Ltd., Ser. Vallourec, NR
              3.875%, 9/18/09 (France) (b)                            12,510,003
$   6,000,000 Peabody Energy Corp., B
              4.75%, 12/15/41                                          7,440,000
--------------------------------------------------------------------------------
                                                                      31,588,711
--------------------------------------------------------------------------------


PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              FINANCIAL SERVICES - 2.7%
$   3,668,000 CompuCredit Corp., NR
              5.875%, 11/30/35                                      $  1,325,065
$   1,750,000 Countrywide Financial Corp., BB+
              0.00%, 4/15/37 (c)                                       1,627,500
(euro)
    3,500,000 Fortfinlux S.A., Ser. REGS, A-
              5.722%, 11/07/72 (Luxembourg) (c)                        4,563,663
$   1,750,000 Nasdaq OMX Group (The), BB+
              2.50%, 8/15/13 (a)                                       1,745,625
Swiss
    5,000,000 Swiss Reinsurance Treasury Luxembourg SA, Ser. RUKN, AA-
Franc         6.00%, 12/15/08 (Switzerland)                            4,259,887
--------------------------------------------------------------------------------
                                                                      13,521,740
--------------------------------------------------------------------------------
              HEALTH CARE PRODUCTS AND SERVICES - 2.8%
$   2,000,000 Advanced Medical Optics, Inc., B-
              1.375%, 7/01/25                                          1,675,000
HK
$  94,000,000 Dexia Banque Internationale & Luxembourg SA,
              Ser. Hengan, NR
              8.00%, 7/24/08 (China) (b)                              12,498,602
--------------------------------------------------------------------------------
                                                                      14,173,602
--------------------------------------------------------------------------------
              INDUSTRIAL - 3.2%
(euro)
   10,600,000 Bayer Hypo, Ser. Lafarge, A
              8.00%, 10/03/08 (France) (b)                            16,319,955
--------------------------------------------------------------------------------
              INTERNET - 0.7%
$   3,500,000 Equinix, Inc., CCC+
              2.50%, 4/15/12                                           3,692,500
--------------------------------------------------------------------------------
              MACHINERY - DIVERSIFIED - 2.2%
$  12,500,000 Allegro Investment Corp., Ser. Nabtesco, NR
              8.00%, 7/16/08 (Japan) (a)(b)                           11,000,822
--------------------------------------------------------------------------------
              OIL AND GAS - 0.6%
CAD 3,000,000 Harvest Energy Trust, NR
              7.25%, 9/30/13 (Canada)                                  2,725,648
--------------------------------------------------------------------------------
              PHARMACEUTICALS - 1.6%
$   5,000,000 Omnicare, Inc., B+
              3.25%, 12/15/35                                          3,481,250
$   4,000,000 Teva Pharmaceutical Finance Co. BV, Ser. D, BBB+
              1.75%, 2/01/26 (Netherlands)                             4,570,000
--------------------------------------------------------------------------------
                                                                       8,051,250
--------------------------------------------------------------------------------
              RETAIL - SPECIALTY STORES - 3.4%
$  12,000,000 BNP Paribas SA, Ser. Don Quijote, AA
              8.00%, 6/30/08 (Japan) (a)(b)                           10,718,400
(pound)
    3,500,000 Punch Taverns Redwood Jersey Co. Ltd., NR
              5.00%, 12/14/10 (Jersey)                                 6,501,317
--------------------------------------------------------------------------------
                                                                      17,219,717
--------------------------------------------------------------------------------
              TELECOMMUNICATIONS - 1.4%
$   7,500,000 Level 3 Communications, Inc., CCC
              6.00%, 9/15/09                                           7,050,000
--------------------------------------------------------------------------------
              TRANSPORTATION - 0.5%
$   2,947,000 YRC Worldwide, Inc., B+
              5.00%, 8/08/23                                           2,604,411
--------------------------------------------------------------------------------


See notes to financial statements.

                                          SemiAnnual Report | April 30, 2008 | 3



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
PORTFOLIO OF INVESTMENTS (unaudited) continued

PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              UTILITIES - GAS AND ELECTRIC - 2.4%
(euro)
    7,200,000 Deutsche Bank AG., Ser. CEZ, NR
              8.00%, 6/20/08 (Czech Republic) (b)                   $ 11,996,600
--------------------------------------------------------------------------------
              TOTAL CONVERTIBLE BONDS - 44.0%
              (Cost $237,656,483)                                    223,171,171
--------------------------------------------------------------------------------

NUMBER
OF SHARES                                                                  VALUE
--------------------------------------------------------------------------------

              CONVERTIBLE PREFERRED STOCKS - 42.9%

              ADVERTISING - 1.0%
      419,750 Elf Special Financing Ltd., 3.15%, 2009
              (Cayman Islands) (a) (c)                              $  4,983,500
--------------------------------------------------------------------------------
              AIRLINES - 1.2%
      250,000 Continental Airlines Financial Trust II, 6.00%, 2030     6,140,625
--------------------------------------------------------------------------------
              ALUMINUM, STEEL AND OTHER METALS - 1.3%
       40,000 Freeport-McMoRan Copper & Gold, Inc., 6.75%, 2010        6,517,600
--------------------------------------------------------------------------------
              AUTOMOTIVE - 2.8%
      100,000 Ford Motor Co. Capital Trust II, 6.50%, 2032             3,685,000
      417,919 Merrill Lynch International Co., Ser. Suzuki,
              8.00%, 2008 (Japan) (a)(b)                              10,673,651
--------------------------------------------------------------------------------
                                                                      14,358,651
--------------------------------------------------------------------------------
              BANKING AND FINANCE - 1.1%
        5,100 Bank of America Corp., Ser. L, 7.25%, 2049               5,599,800
--------------------------------------------------------------------------------
              BEVERAGES - 2.6%
      529,287 Allegro Investment Corp. SA, Ser. SABMiller,
              8.00%, 2008 (United Kingdom) (b)                        12,988,188
--------------------------------------------------------------------------------
              CHEMICALS - 1.0%
        5,400 Givaudan Nederland Finance, 5.375%, 2010
              (Netherlands)                                            4,855,593
--------------------------------------------------------------------------------
              COMMUNICATIONS EQUIPMENT - 3.1%
       15,000 Lucent Technologies Capital Trust I, 7.75%, 2017 (d)    11,400,000
      394,055 Merrill Lynch & Co., Inc., Ser. Motorola, Inc.,
              18.70%, 2008 (a)(b)                                      4,326,724
--------------------------------------------------------------------------------
                                                                      15,726,724
--------------------------------------------------------------------------------
              COMPUTERS - SOFTWARE AND PERIPHERALS - 0.9%
      234,010 Merrill Lynch & Co., Inc., Ser. Dell, Inc.,
              14.85%, 2008 (a)(b)                                      4,507,033
--------------------------------------------------------------------------------
              DIVERSIFIED MANUFACTURING OPERATIONS - 2.2%
      100,000 KBC Financial Products, Ser. Siemens AG,
              8.00%, 2008 (Germany) (b)                               11,092,913
--------------------------------------------------------------------------------
              DIVERSIFIED METALS AND MINING - 1.4%
      100,000 Vale Capital Ltd., Ser. RIO, 5.50%, 2010 (Brazil) (b)    7,325,000
--------------------------------------------------------------------------------
              ELECTRONIC EQUIPMENT AND COMPONENTS - 2.0%
      445,820 Wachovia Bank NA, Ser. Intel, 8.00%, 2008 (a)(b)        10,157,028
--------------------------------------------------------------------------------
              ENGINEERING - 3.5%
      628,060 Eksportfinans A/S, Ser. ABB Ltd., 8.00%,
              2008 (Switzerland) (a)(b)                               17,888,690
--------------------------------------------------------------------------------
              ENTERTAINMENT - 1.5%
      222,750 Lehman Brothers Holdings, Inc., Ser.
              International Game Tech., 8.00%, 2008 (b)                7,753,927
--------------------------------------------------------------------------------
              FINANCIAL SERVICES - 2.8%
       70,000 Affiliated Managers Group, Inc., 5.10%, 2036             3,049,375
          115 Fannie Mae, 5.375%, 2049                                 8,165,029
        3,250 SLM Corp., Ser. C, 7.25%, 2010 (e)                       3,117,562
--------------------------------------------------------------------------------
                                                                      14,331,966
--------------------------------------------------------------------------------

NUMBER
OF SHARES                                                                  VALUE
--------------------------------------------------------------------------------
              INSURANCE - 1.1%
       40,000 Aspen Insurance Holdings Ltd., Ser. AHL,
              5.625%, 2049 (Bermuda)                                $  1,962,000
      250,000 XL Capital Ltd., 7.00%, 2009 (Cayman Islands)            3,517,500
--------------------------------------------------------------------------------
                                                                       5,479,500
--------------------------------------------------------------------------------
              MACHINE TOOLS - 1.5%
       63,000 Merrill Lynch International & Co. CV, Ser.
              SMC Corp., 8.00%, 2008 (Japan) (a)(b)                    7,379,505
--------------------------------------------------------------------------------
              MACHINERY AND EQUIPMENT - 2.9%
      475,500 Morgan Stanley, Ser. Komatsu, 8.00%,
              2008 (Japan) (a)(b)                                     14,655,146
--------------------------------------------------------------------------------
              MISC. CONSUMER DISCRETIONARY - 0.9%
      100,000 Avery Dennison Corp., 7.875%, 2010 (e)                   4,777,000
--------------------------------------------------------------------------------
              OIL AND GAS - 0.6%
       25,000 Chesapeake Energy Corp., 4.50%, 2049                     3,218,750
--------------------------------------------------------------------------------
              PHARMACEUTICALS - 4.7%
       14,000 Mylan, Inc., 6.50%, 2010                                13,049,960
       60,000 Schering-Plough Corp., 6.00%, 2010                      10,831,800
--------------------------------------------------------------------------------
                                                                      23,881,760
--------------------------------------------------------------------------------
              REAL ESTATE INVESTMENT TRUSTS - 0.5%
      150,000 HRPT Properties Trust, Ser. D, 6.50%, 2049               2,647,500
--------------------------------------------------------------------------------
              UTILITIES - GAS AND ELECTRIC - 2.3%
       85,000 Entergy Corp., 7.625%, 2009                              5,713,700
       15,000 NRG Energy, Inc., 5.75%, 2009                            5,652,187
--------------------------------------------------------------------------------
                                                                      11,365,887
--------------------------------------------------------------------------------
              TOTAL CONVERTIBLE PREFERRED STOCKS - 42.9%
              (Cost $239,760,202)                                    217,632,286
--------------------------------------------------------------------------------

              COMMON STOCKS - 19.7%
              ALUMINUM, STEEL AND OTHER METALS - 1.2%
       12,000 Freeport-McMoRan Copper & Gold, Inc., Class B            1,365,000
       16,700 Vallourec SA (France)                                    4,556,540
--------------------------------------------------------------------------------
                                                                       5,921,540
--------------------------------------------------------------------------------
              AUTOMOTIVE - 1.2%
       10,850 Daimler AG (Germany)                                       843,436
      207,000 Suzuki Motor Corp. (Japan)                               5,209,167
--------------------------------------------------------------------------------
                                                                       6,052,603
--------------------------------------------------------------------------------
              AUTO PARTS AND EQUIPMENT - 0.0%
          800 Continental AG (Germany)                                    94,074
--------------------------------------------------------------------------------
              BUILDING PRODUCTS AND SERVICES - 0.6%
       28,600 Holcim Ltd. (Switzerland)                                2,798,080
--------------------------------------------------------------------------------
              CHEMICALS - 1.0%
      461,000 Tokai Carbon Co., Ltd. (Japan)                           4,786,001
--------------------------------------------------------------------------------
              DIVERSIFIED OPERATIONS - 0.5%
      629,000 Shanghai Industrial Holdings Ltd. (China)                2,606,510
--------------------------------------------------------------------------------
              FINANCIAL SERVICES - 1.6%
      700,000 Man Group PLC (United Kingdom) (e)                       8,061,833
--------------------------------------------------------------------------------
              HEALTH CARE PRODUCTS AND SERVICES - 0.4%
      570,000 Hengan International Group Co., Ltd. (Cayman Islands)    2,036,602
--------------------------------------------------------------------------------

See notes to financial statements.

4 | SemiAnnual Report | April 30, 2008


AGC | Advent/Claymore Global Convertible Securities & Income Fund |
PORTFOLIO OF INVESTMENTS (unaudited) continued

NUMBER
OF SHARES                                                                  VALUE
--------------------------------------------------------------------------------
              LEISURE AND ENTERTAINMENT - 0.6%
       90,000 International Game Technology                         $  3,126,600
--------------------------------------------------------------------------------
              MACHINERY AND EQUIPMENT - 0.7%
      138,000 Nabtesco Corp. (Japan)                                   2,026,887
       15,000 SMC Corp. (Japan)                                        1,733,805
--------------------------------------------------------------------------------
                                                                       3,760,692
--------------------------------------------------------------------------------
              OIL AND GAS - 6.5%
      170,200 Baytex Energy Income Trust (Canada)                      4,263,872
      387,500 Bonavista Energy Income Trust (Canada)                  11,897,031
      251,000 Enerplus Resources Income Trust Fund (Canada)           11,247,771
      155,700 Harvest Energy Income Trust (Canada)                     3,453,816
       60,000 Vermilion Energy Income Trust (Canada)                   2,363,420
--------------------------------------------------------------------------------
                                                                      33,225,910
--------------------------------------------------------------------------------
              PHARMACEUTICALS - 1.1%
       34,000 Roche Holding AG (Switzerland)                           5,640,824
--------------------------------------------------------------------------------
              REAL ESTATE - 0.6%
      478,000 Kerry Properties Ltd. (Bermuda)                          3,234,868
--------------------------------------------------------------------------------
              RETAIL - SPECIALTY STORES - 1.4%
       30,000 GameStop Corp., Class A (e)(f)                           1,651,200
      222,069 Whitbread PLC (United Kingdom)                           5,343,801
--------------------------------------------------------------------------------
                                                                       6,995,001
--------------------------------------------------------------------------------
              TELECOMMUNICATIONS - 1.3%
       30,000 Amdocs Ltd. (Guernsey) (f)                                 941,400
      125,000 NII Holdings, Inc. (e)(f)                                5,717,500
--------------------------------------------------------------------------------
                                                                       6,658,900
--------------------------------------------------------------------------------
              WASTE MANAGEMENT - 1.0%
      400,000 Allied Waste Industries, Inc. (f)                        4,944,000
--------------------------------------------------------------------------------
              TOTAL COMMON STOCKS - 19.7%
              (Cost $109,134,325)                                     99,944,038
--------------------------------------------------------------------------------

PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              CORPORATE BONDS - 12.2%
              ADVERTISING - 0.2%
$   1,000,000 Interpublic Group of Companies, Inc., B+
              7.25%, 8/15/11                                        $    985,000
--------------------------------------------------------------------------------
              COMMUNICATIONS, MEDIA AND ENTERTAINMENT - 0.9%
    2,000,000 Cablevision Systems Corp., Ser. B, B+
              8.00%, 4/15/12                                           2,000,000
    2,500,000 Nielsen Finance LLC, B-
              10.00%, 8/01/14                                          2,612,500
--------------------------------------------------------------------------------
                                                                       4,612,500
--------------------------------------------------------------------------------
              COMPUTERS - SOFTWARE AND PERIPHERALS - 0.5%
    2,500,000 SunGard Data Systems, Inc., B-
              10.25%, 8/15/15                                          2,668,750
--------------------------------------------------------------------------------


PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              DIVERSIFIED OPERATIONS - 1.0%
$   5,000,000 Leucadia National Corp., BB+
              8.125%, 9/15/15                                       $  5,125,000
--------------------------------------------------------------------------------
              ELECTRONIC EQUIPMENT AND COMPONENTS - 0.4%
    2,500,000 Freescale Semiconductor, Inc., B-
              6.675%, 12/15/14 (c)                                     2,006,250
--------------------------------------------------------------------------------
              FINANCIAL SERVICES - 2.2%
   10,000,000 CDX North America High Yield, Ser. 8-T1, NR
              7.625%, 6/29/12 (a)                                      9,712,500
    1,400,000 JPMorgan Chase & Co., Ser. 1, A
              7.90%, 4/29/49 (c)                                       1,430,790
--------------------------------------------------------------------------------
                                                                      11,143,290
--------------------------------------------------------------------------------
              FOOD, BEVERAGE AND TOBACCO - 0.4%
    2,000,000 Vector Group Ltd., NR
              11.00%, 8/15/15 (a)                                      2,030,000
--------------------------------------------------------------------------------
              FOREST PRODUCTS AND PAPER - 0.5%
              Verso Paper Holdings LLC, Ser. B, B+
    1,000,000 9.125%, 8/01/14                                          1,037,500
    1,500,000 6.989%, 8/01/14 (c)                                      1,410,000
--------------------------------------------------------------------------------
                                                                       2,447,500
--------------------------------------------------------------------------------
              HEALTH CARE PRODUCTS AND SERVICES - 1.9%
    1,750,000 Axcan Intermediate Holdings, Inc., B-
              12.75%, 3/01/16 (a)                                      1,720,950
              HCA, Inc., B-
    2,000,000 6.50%, 2/15/16                                           1,800,000
    3,000,000 8.36%, 4/15/24                                           2,663,001
    1,000,000 HCA, Inc., BB-
              9.25%, 11/15/16                                          1,077,500
    2,500,000 Tenet Healthcare Corp., B
              9.25%, 2/01/15                                           2,493,750
--------------------------------------------------------------------------------
                                                                       9,755,201
--------------------------------------------------------------------------------
              LEISURE AND ENTERTAINMENT - 0.6%
    2,000,000 Caesars Entertainment, Inc., B-
              8.125%, 5/15/11                                          1,702,500
    2,000,000 Harrah's Operating Co., Inc., B-
              6.50%, 6/01/16                                           1,170,000
--------------------------------------------------------------------------------
                                                                       2,872,500
--------------------------------------------------------------------------------
              OIL AND GAS - 0.5%
    3,000,000 CCS, Inc., B-
              11.00%, 11/15/15 (Canada) (a)                            2,696,400
--------------------------------------------------------------------------------
              PACKAGING AND CONTAINERS - 1.0%
    1,000,000 Graphic Packaging International Corp., B-
              9.50%, 8/15/13                                           1,000,000
    3,500,000 Jefferson Smurfit Corp., B-
              8.25%, 10/01/12                                          3,202,500
    1,000,000 Smurfit-Stone Container Enterprises, Inc., B-
              8.375%, 7/01/12                                            920,000
--------------------------------------------------------------------------------
                                                                       5,122,500
--------------------------------------------------------------------------------

See notes to financial statements.
                                          SemiAnnual Report | April 30, 2008 | 5



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
PORTFOLIO OF INVESTMENTS (unaudited) continued

PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              TELECOMMUNICATIONS - 1.1%
$   1,500,000 Broadview Networks Holdings, Inc., CCC+
              11.375%, 9/01/12                                      $  1,440,000
    1,000,000 Cricket Communications, Inc., B-
              9.375%, 11/01/14                                           986,250
    3,000,000 Sprint Capital Corp., BB
              8.375%, 3/15/12                                          2,857,500
--------------------------------------------------------------------------------
                                                                       5,283,750
--------------------------------------------------------------------------------
              TRANSPORTATION - 0.5%
    2,500,000 USF Corp., B+
              8.50%, 4/15/10                                           2,300,000
--------------------------------------------------------------------------------
              UTILITIES - GAS AND ELECTRIC - 0.5%
    2,500,000 Texas Competitive Electric Holdings Co., LLC, CCC
              10.25%, 11/01/15 (a)                                     2,618,750
--------------------------------------------------------------------------------
              TOTAL CORPORATE BONDS - 12.2%
              (Cost $62,262,389)                                      61,667,391
--------------------------------------------------------------------------------

NUMBER
OF SHARES                                                                  VALUE
--------------------------------------------------------------------------------
              EXCHANGE-TRADED FUNDS - 0.7%
       40,000 UltraShort QQQ ProShares (e)                          $  1,690,400
       30,000 UltraShort S&P500 ProShares (e)                          1,741,200
--------------------------------------------------------------------------------
              (Cost $3,769,900)                                        3,431,600
--------------------------------------------------------------------------------
              TOTAL LONG-TERM INVESTMENTS - 119.5%
              (Cost $652,583,299)                                    605,846,486
--------------------------------------------------------------------------------

PRINCIPAL
AMOUNT                                                                     VALUE
--------------------------------------------------------------------------------
              SHORT-TERM INVESTMENTS - 16.0%
              U.S. GOVERNMENT SECURITIES - 14.6%
$  74,120,000 United States Treasury Bill yielding
              2.027%, 7/03/08 (d)
              (Cost $73,859,283)                                    $ 73,957,825
--------------------------------------------------------------------------------

NUMBER
OF SHARES                                                                  VALUE
--------------------------------------------------------------------------------
              MONEY MARKET FUNDS - 1.4%
    7,337,053 Goldman Sachs Financial Prime Obligations
              (Cost $7,337,053)                                     $  7,337,053
--------------------------------------------------------------------------------
              TOTAL SHORT-TERM INVESTMENTS - 16.0%
              (Cost $81,196,336)                                      81,294,878
--------------------------------------------------------------------------------



CONTRACTS
(100 SHARES                                           EXPIRATION     EXERCISE
PER CONTRACT) PUT OPTIONS PURCHASED (f)                     DATE        PRICE             VALUE
-----------------------------------------------------------------------------------------------
              PUT OPTIONS PURCHASED - 0.0%
                                                                      
          400 UltraShort QQQ ProShares                  May 2008       $41.00     $      38,000
          400 UltraShort S&P500 ProShares               May 2008        55.00            19,000
-----------------------------------------------------------------------------------------------
              TOTAL PUT OPTIONS PURCHASED                                                57,000
              (Cost $100,880)
-----------------------------------------------------------------------------------------------
              TOTAL INVESTMENTS - 135.5%
              (Cost $733,880,515)                                                   687,198,364
              Total Options Written - (0.1%)                                           (391,160)
              Liabilities in excess of other assets - (1.9%)                         (9,614,876)
              Preferred Stock, at redemption value - (-33.5% of Net Assets
              Applicable to Common Shareholders or - 24.7% of Total Investments)   (170,000,000)
-----------------------------------------------------------------------------------------------
           NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS - 100.0%                  $ 507,192,328
===============================================================================================

AG - Stock Corporation

Ltd. - Limited

LLC - Limited Liability Corp.

SA - Corporation

(a)  Securities are exempt from registration under Rule 144A of the Securities
     Act of 1933. These securities may be resold in transactions exempt from
     registration, normally to qualified institutional buyers. At April 30,
     2008, these securities amounted to 29.1% of net assets.

(c)  Floating rate security. The rate shown is as of April 30, 2008.

(b)  Synthetic Convertible - A synthetic convertible security is either a bond
     or preferred security structured by an investment bank that provides
     exposure to a specific company's common stock.

(d)  All or a portion of these securities have been physically segregated in
     connection with swap agreements.

(e)  All or a portion of this security position represents cover (directly or
     through conversion rights) for outstanding options written.

(f)  Non-income producing security.

Ratings shown are per Standard & Poor's. Securities classified as NR are not
rated by Standard & Poor's.

All percentages shown in the Portfolio of Investments are based on Net Assets
Applicable to Common Shareholders unless otherwise noted.


CONTRACTS
(100 SHARES                                           EXPIRATION       EXERCISE     MARKET
PER CONTRACT)  CALL OPTIONS WRITTEN(f)                      DATE          PRICE      VALUE
------------------------------------------------------------------------------------------
                                                                      
 100           Avery Dennison Corp., 7.875%, 2010       May 2008       $  50.00   $  6,000
 100           GameStop Corp., Class A                  May 2008          55.00     20,000
 100           GameStop Corp., Class A                  May 2008          60.00      3,500
 100           GameStop Corp., Class A                 June 2008          65.00      8,000
 300           Man Group PLC (United Kingdom)          June 2008         595.00    176,680
 200           Man Group PLC (United Kingdom)          June 2008         635.00     59,417
 100           NII Holdings, Inc.                       May 2008          40.00     60,000
 50            SLM Corp., Ser. C, 7.125%, 2010         July 2008          20.00      7,250
 225           UltraShort QQQ ProShares                June 2008          49.00     25,313
 250           UltraShort S&P500 ProShares             June 2008          66.00     25,000
------------------------------------------------------------------------------------------
               TOTAL CALL OPTIONS WRITTEN
               (Premiums received $415,928)                                       $391,160
==========================================================================================
(f)  Non-income producing security. See notes to financial statements.


6 | SemiAnnual Report | April 30, 2008



AGC | Advent/Claymore Global Convertible Securities & Income Fund

Statement of ASSETS AND LIABILITIES | APRIL 30, 2008 (unaudited)



                                                                                               
ASSETS
   Investments in securities, at value (cost $733,880,515)                                        $687,198,364
   Foreign currency, at value (cost $750,404)                                                          752,952
   Restricted Cash                                                                                   3,347,188
   Cash                                                                                              2,082,353
   Receivable for securities sold                                                                    7,286,032
   Dividends and interest receivable                                                                 5,247,846
   Net unrealized appreciation on forward foreign currency contracts                                 1,452,984
   Other assets                                                                                         44,402
--------------------------------------------------------------------------------------------------------------
      Total assets                                                                                 707,412,121
--------------------------------------------------------------------------------------------------------------
LIABILITIES
   Net unrealized depreciation on swaps                                                             15,985,301
   Payable for securities purchased                                                                 12,244,888
   Net unrealized depreciation on forward foreign currency contracts                                   702,835
   Options written, at value (premiums received of $415,928)                                           391,160
   Investment management fee payable                                                                   324,089
   Investment advisory fee payable                                                                     216,060
   Offering costs payable                                                                               86,553
   Dividends payable - preferred shares                                                                 66,310
   Accrued expenses and other liabilities                                                              202,597
--------------------------------------------------------------------------------------------------------------
      Total liabilities                                                                             30,219,793
--------------------------------------------------------------------------------------------------------------
PREFERRED STOCK, AT REDEMPTION VALUE
   Auction Market Preferred Shares
   $0.001 par value per share; 6,800 authorized, issued and outstanding at $25,000
   per share liquidation preference                                                                170,000,000
--------------------------------------------------------------------------------------------------------------
NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS                                                      $507,192,328
==============================================================================================================
COMPOSITION OF NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS
   Common Stock, $0.001 par value per share; unlimited number of shares authorized,
   31,867,616 shares issued and outstanding                                                       $     31,868
   Additional paid-in capital                                                                      605,186,036
   Net unrealized depreciation on investments, options, swaps and foreign
   currency translation                                                                            (60,793,546)
   Accumulated net realized loss on investments, options, swaps and
   foreign currency transactions                                                                   (21,669,674)
   Distributions in excess of net investment income                                                (15,562,356)
--------------------------------------------------------------------------------------------------------------
NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS                                                      $507,192,328
==============================================================================================================
NET ASSET VALUE APPLICABLE TO COMMON SHAREHOLDERS
   (based on 31,867,616 common shares outstanding)                                                $      15.92
==============================================================================================================

See notes to financial statements.
                                          SemiAnnual Report | April 30, 2008 | 7


AGC | Advent/Claymore Global Convertible Securities & Income Fund

Statement of OPERATIONS | FOR THE SIX MONTHS ENDED APRIL 30, 2008 (unaudited)


                                                                                            
INVESTMENT INCOME
   Dividends (net of foreign withholding taxes of $417,616)                     $ 11,356,156
   Interest                                                                       11,250,227
--------------------------------------------------------------------------------------------------------------
      Total income                                                                                $ 22,606,383
--------------------------------------------------------------------------------------------------------------
EXPENSES
   Investment management fee                                                       2,051,860
   Investment advisory fee                                                         1,367,907
   Auction agent fee - preferred shares                                              221,047
   Fund accounting                                                                   100,009
   Professional fees                                                                  96,815
   Printing                                                                           82,494
   Administration fee                                                                 78,646
   Trustees' fees and expenses                                                        75,262
   Custodian                                                                          47,720
   Insurance                                                                          23,149
   Transfer agent                                                                     11,469
   NYSE listing fee                                                                   10,259
   Rating agency fee                                                                   7,462
   Miscellaneous                                                                       5,153
--------------------------------------------------------------------------------------------------------------
      Total expenses                                                                                 4,179,252
--------------------------------------------------------------------------------------------------------------
      NET INVESTMENT INCOME                                                                         18,427,131
--------------------------------------------------------------------------------------------------------------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, OPTIONS, SWAPS AND FOREIGN
   CURRENCY TRANSACTIONS Net realized gain (loss) on:
      Investments                                                                                  (21,809,334)
      Options                                                                                          740,755
      Swaps                                                                                           (181,846)
      Foreign currency transactions                                                                 (2,398,959)
   Net change in unrealized appreciation (depreciation) on:
      Investments                                                                                  (64,305,684)
      Options                                                                                          (33,635)
      Swaps                                                                                         (9,286,263)
      Foreign currency translation                                                                     879,312
--------------------------------------------------------------------------------------------------------------
   NET REALIZED AND UNREALIZED LOSS ON INVESTMENTS, OPTIONS SWAPS AND
   FOREIGN CURRENCY TRANSACTIONS                                                                   (96,395,654)
--------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS TO PREFERRED SHAREHOLDERS FROM NET INVESTMENT INCOME                                  (4,087,418)
--------------------------------------------------------------------------------------------------------------
NET DECREASE IN NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS RESULTING FROM OPERATIONS            $(82,055,941)
==============================================================================================================

See notes to financial statements.

8 | SemiAnnual Report | April 30, 2008

AGC | Advent/Claymore Global Convertible Securities & Income Fund

Statement of CHANGES IN NET ASSETS
APPLICABLE TO COMMON SHAREHOLDERS |


                                                                                                     FOR THE      FOR THE PERIOD
                                                                                            SIX MONTHS ENDED       MAY 29, 2007*
                                                                                              APRIL 30, 2008             THROUGH
                                                                                                  (UNAUDITED)   OCTOBER 31, 2007
---------------------------------------------------------------------------------------------------------------------------------
                                                                                                               
INCREASE IN NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS RESULTING FROM OPERATIONS:
   Net investment income                                                                        $ 18,427,131         $13,040,647
   Net realized gain/(loss) on investments, options, swaps and foreign currency transactions     (23,649,384)          2,130,479
   Net change in unrealized appreciation (depreciation) on investments, options, swaps
      and foreign currency translation                                                           (72,746,270)         11,952,724
DISTRIBUTIONS TO PREFERRED SHAREHOLDERS FROM:
   Net investment income                                                                          (4,087,418)         (1,285,034)
---------------------------------------------------------------------------------------------------------------------------------
   Net increase/(decrease) in net assets applicable to Common Shareholders resulting
      from operations                                                                            (82,055,941)         25,838,816
---------------------------------------------------------------------------------------------------------------------------------
DIVIDENDS AND DISTRIBUTIONS TO COMMON SHAREHOLDERS:
   From and in excess of net investment income                                                   (27,877,790)        (13,930,661)
---------------------------------------------------------------------------------------------------------------------------------
CAPITAL SHARE TRANSACTIONS:
   Proceeds from the issuance of common shares                                                            --         607,492,690
   Reinvestment in dividends                                                                              --             997,366
   Common share offering costs charged to paid-in capital                                                 --          (3,372,236)
---------------------------------------------------------------------------------------------------------------------------------
      Net increase from capital share transactions                                                        --         605,117,820
---------------------------------------------------------------------------------------------------------------------------------
      Total increase/(decrease) in net assets                                                   (109,933,731)        617,025,975
---------------------------------------------------------------------------------------------------------------------------------
NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS
   Beginning of period                                                                           617,126,059             100,084
---------------------------------------------------------------------------------------------------------------------------------
   End of period (including distributions in excess of net investment income
      $15,562,356 and $2,024,279, respectively)                                                 $507,192,328        $617,126,059
=================================================================================================================================

*    Commencement of investment operations.

See notes to financial statements.

                                          SemiAnnual Report | April 30, 2008 | 9


AGC | Advent/Claymore Global Convertible Securities & Income Fund
Financial HIGHLIGHTS |


                                                                                                       FOR THE       FOR THE PERIOD
                                                                                              SIX MONTHS ENDED      MAY 29, 2007(a)
PER SHARE OPERATING PERFORMANCE                                                                 APRIL 30, 2008              THROUGH
FOR A SHARE OF COMMON STOCK OUTSTANDING THROUGHOUT THE PERIOD                                      (UNAUDITED)     OCTOBER 31, 2007
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                              
NET ASSET VALUE, BEGINNING OF PERIOD                                                            $      19.37        $      19.10(b)
------------------------------------------------------------------------------------------------------------------------------------
INCOME FROM INVESTMENT OPERATIONS
   Net investment income (c)                                                                            0.58                0.42
   Net realized and unrealized gain on investments, options, swaps and
      foreign currency transactions                                                                    (3.02)               0.44
DISTRIBUTIONS TO PREFERRED SHAREHOLDERS FROM NET INVESTMENT INCOME
(COMMON SHARE EQUIVALENT BASIS)                                                                        (0.13)              (0.04)
------------------------------------------------------------------------------------------------------------------------------------
      Total from investment operations                                                                 (2.57)               0.82
------------------------------------------------------------------------------------------------------------------------------------
COMMON AND PREFERRED SHARES' OFFERING EXPENSES CHARGED TO PAID-IN-CAPITAL                                 --               (0.11)
------------------------------------------------------------------------------------------------------------------------------------
DIVIDENDS AND DISTRIBUTIONS TO COMMON SHAREHOLDERS
   from and in excess of net investment income                                                         (0.88)              (0.44)
------------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD                                                                  $      15.92        $      19.37
====================================================================================================================================
MARKET VALUE, END OF PERIOD                                                                     $      14.40        $      16.75
====================================================================================================================================
TOTAL INVESTMENT RETURN (d)
   Net asset value                                                                                    -13.25%               3.82%
   Market value                                                                                        -8.82%             -14.11%
RATIOS AND SUPPLEMENTAL DATA
Net assets, applicable to Common Shareholders, end of period (thousands)                        $    507,192        $    617,126
Preferred shares, at redemption value ($25,000 per share liquidation preference) (thousands)    $    170,000        $    170,000
Preferred shares asset coverage per share                                                       $     99,587        $    115,700
RATIOS TO AVERAGE NET ASSETS APPLICABLE TO COMMON SHARES:
   Net Expenses, after balance credits                                                                 1.62%(e)             1.33%(e)
   Net Expenses, before balance credits                                                                1.62%(e)             1.35%(e)
   Net Investment Income, after balance credits, prior to effect of dividends to preferred shares      7.16%(e)             5.22%(e)
   Net Investment Income, before balance credits, prior to effect of dividends to preferred shares     7.16%(e)             5.20%(e)
   Net Investment Income, after balance credits, after effect of dividends to preferred shares         5.57%(e)             4.70%(e)
   Net Investment Income, before balance credits, after effect of dividends to preferred shares        5.57%(e)             4.68%(e)
RATIOS TO AVERAGE MANAGED ASSETS: (f)
   Net Expenses, after balance credits                                                                 1.22%(e)             1.22%(e)
   Net Expenses, before balance credits                                                                1.22%(e)             1.24%(e)
   Net Investment Income, after balance credits, prior to effect of dividends to preferred shares      5.39%(e)             4.79%(e)
   Net Investment Income, before balance credits, prior to effect of dividends to preferred shares     5.39%(e)             4.77%(e)
Portfolio turnover rate                                                                                  35%                  35%

(a)  Commencement of investment operations.

(b)  Before reimbursement of offering expenses charged to capital during the
     period.

(c)  Based on average shares outstanding during the period.

(d)  Total investment return is calculated assuming a purchase of a common share
     at the beginning of the period and a sale on the last day of the period
     reported either at net asset value ("NAV") or market price per share.
     Dividends and distributions are assumed to be reinvested at NAV for NAV
     returns or the prices obtained under the Fund's Dividend Reinvestment Plan
     for market value returns. Total investment return does not reflect
     brokerage commissions. A return calculated for a period of less than one
     year is not annualized.

(e)  Annualized.

(f)  Managed assets is equal to net assets applicable to common shareholders
     plus outstanding leverage such as the liquidation value of preferred
     shares.

See notes to financial statements.

l0 | SemiAnnual Report | April 30, 2008


AGC | Advent/Claymore Global Convertible Securities & Income Fund

Notes to FINANCIAL STATEMENTS | APRIL 30, 2008 (unaudited)



Note 1 - ORGANIZATION:

Advent/Claymore Global Convertible Securities & Income Fund (the "Fund") was
organized as a Delaware statutory trust on February 26, 2007. The Fund is
registered as a diversified, closed-end management investment company under the
Investment Company Act of 1940, as amended.

The Fund's primary investment objective is to provide total return, through a
combination of capital appreciation and current income. The Fund will pursue its
investment objective by investing 80% of its assets in a diversified portfolio
of convertible securities and non-convertible income-producing securities, each
of U.S. and non-U.S. issuers.


Note 2 - ACCOUNTING POLICIES:

The preparation of the financial statements in accordance with U.S. generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts and disclosures in the financial
statements. Actual results could differ from these estimates.

The following is a summary of significant accounting policies followed by the
Fund.

(A) VALUATION OF INVESTMENTS

Equity securities listed on an exchange are valued at the last reported sale
price on the primary exchange on which they are traded. Equity securities traded
on an exchange for which there are no transactions on a given day are valued at
the mean of the closing bid and asked prices. Securities traded on NASDAQ are
valued at the NASDAQ Official Closing Price. Equity securities not listed on a
securities exchange or NASDAQ are valued at the mean of the closing bid and
asked prices. Debt securities are valued by independent pricing services or
dealers using the mean of the closing bid and asked prices for such securities
or, if such prices are not available, at prices for securities of comparable
maturity, quality and type. Futures contracts are valued using the settlement
price established each day on the exchange on which they are traded.
Exchange-traded options are valued at the closing price, if traded that day. If
not traded, they are valued at the mean of the bid and asked prices on the
primary exchange on which they are traded. For those securities where quotations
or prices are not available, valuations are determined in accordance with
procedures established in good faith by the Board of Trustees. Short-term
securities with remaining maturities of 60 days or less are valued at amortized
cost, which approximates market value.

The Fund values synthetic convertible securities based on quotations obtained
from unaffiliated brokers who are the principal market-makers in such
securities. Such valuations are derived by the brokers from proprietary models
which are generally based on readily available market information including
valuations of the common stock underlying the synthetic security, and the
volatility observed in the market on such common stocks. Because of the inherent
uncertainty in the valuation process, it is reasonably possible that the
estimated values may differ from the values that would have been used had a more
active market for the investments existed, and such differences could be
material. As of April 30, 2008, approximately $238,740,783, representing 34.7%
of total fund investments, are invested in these synthetic convertible
securities.

(B) INVESTMENT TRANSACTIONS AND INVESTMENT INCOME

Investment transactions are accounted for on the trade date. Realized gains and
losses on investments are determined on the identified cost basis. Dividend
income is recorded on the ex-dividend date and interest income is recorded on an
accrual basis. Discounts or premiums on debt securities purchased are accreted
or amortized to interest income over the lives of the respective securities
using the effective interest method.

(C) CURRENCY TRANSLATION

Assets and liabilities denominated in foreign currencies are translated into
U.S. dollars at the mean of the bid and asked price of respective exchange rates
on the last day of the period. Purchases and sales of investments denominated in
foreign currencies are translated at the exchange rate on the date of the
transaction.

The Fund does not isolate that portion of the results of operations resulting
from changes in foreign exchange rates on investments from the fluctuations
arising from changes in market prices of securities held. Such fluctuations are
included with the net realized and unrealized gain or loss from investments.

Foreign exchange realized gain or loss resulting from holding of a foreign
currency, expiration of a currency exchange contract, difference in exchange
rates between the trade date and settlement date of an investment purchased or
sold, and the difference between dividends or interest actually received
compared to the amount shown in the Fund's accounting records on the date of
receipt is shown as net realized gains or losses on foreign currency
transactions in the Fund's Statement of Operations.

Foreign exchange unrealized gain or loss on assets and liabilities, other than
investments, is shown as unrealized appreciation (depreciation) on foreign
currency translation in the Fund's Statement of Operations.

(D) COVERED CALL OPTIONS

The Fund will pursue its primary objective by employing an option strategy of
writing (selling) covered call options on up to 25% of the securities held in
the portfolio of the Fund. The Fund seeks to generate current gains from option
premiums as a means to enhance distributions payable to shareholders.

An option on a security is a contract that gives the holder of the option, in
return for a premium, the right to buy from (in the case of a call) or sell to
(in the case of a put) the writer of the option the security underlying the
option at a specified exercise or "strike" price. The writer of an option on a
security has the obligation upon


                                         SemiAnnual Report | April 30, 2008 | 11



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
NOTES TO FINANCIAL STATEMENTS (unaudited) continued


exercise of the option to deliver the underlying security upon payment of the
exercise price (in the case of a call) or to pay the exercise price upon
delivery of the underlying security (in the case of a put).

There are several risks associated with transactions in options on securities.
As the writer of a covered call option, the Fund forgoes, during the option's
life, the opportunity to profit from increases in the market value of the
security covering the call option above the sum of the premium and the strike
price of the call, but has retained the risk of loss should the price of the
underlying security decline. The writer of an option has no control over the
time when it may be required to fulfill its obligation as writer of the option.
Once an option writer has received an exercise notice, it cannot effect a
closing purchase transaction in order to terminate its obligation under the
option and must deliver the underlying security at the exercise price.

When an option is written, the premium received is recorded as an asset with an
equal liability and is subsequently marked to market to reflect the current
market value of the option written. These liabilities are reflected as options
written in the Statement of Assets and Liabilities. Premiums received from
writing options which expire unexercised are recorded on the expiration date as
a realized gain. The difference between the premium received and the amount paid
on effecting a closing purchase transaction, including brokerage commissions, is
also treated as a realized gain, or if the premium is less than the amount paid
for the closing purchase transactions, as a realized loss. If a call option is
exercised; the premium is added to the proceeds from the sale of the underlying
security in determining whether there has been a realized gain or loss.

(E) FORWARD EXCHANGE CURRENCY CONTRACTS

The Fund may enter into forward exchange currency contracts in order to hedge
its exposure to change in foreign currency exchange rates on its foreign
portfolio holdings, to hedge certain firm purchases and sales commitments
denominated in foreign currencies and for investment purposes. A forward
exchange currency contract is a commitment to purchase or sell a foreign
currency on a future date at a negotiated forward rate. The gain or loss arising
from the difference between the original contracts and the closing of such
contracts would be included in net realized gain or loss on foreign currency
transactions.

Fluctuations in the value of open forward exchange currency contracts are
recorded for financial reporting purposes as unrealized appreciation and
depreciation by the Fund.

Risk may arise from the potential inability of a counterparty to meet the terms
of a contract and from unanticipated movements in the value of a foreign
currency relative to the U.S. dollar. The face or contract amount, in U.S.
dollars, reflects the total exposure the Fund has in that particular currency
contract. Forward exchange currency contracts involve elements of both market
and credit risk in excess of the amounts reflected on the Statement of Assets
and Liabilities.

(F) SWAPS

A swap is an agreement to exchange the return generated by one instrument for
the return generated by another instrument. The Fund may enter into swap
agreements to manage its exposure to interest rates and/or credit risk as well
as to attempt to enhance return. Total return swap agreements are contracts in
which one party agrees to make payments of the total return from the underlying
asset during a specified period in return for receiving payments equal to a
fixed or floating rate of interest or the total return from another designated
underlying asset. The swaps are valued daily at current market value and any
unrealized gain or loss is included in the Statement of Assets and Liabilities.
Gain or loss is realized on the termination date of the swap and is equal to the
difference between the Fund's basis in the swap and the proceeds of the closing
transaction, including any fees. During the period that the swap agreement is
open, the Fund may be subject to risk from the potential inability of the
counterparty to meet the terms of the agreement. The swaps involve elements of
both market and credit risk in excess of the amounts reflected on the Statement
of Assets and Liabilities.

Realized gain (loss) upon termination of swap contracts is recorded on the
Statement of Operations. Fluctuations in the value of swap contracts are
recorded as a component of net change in unrealized appreciation (depreciation)
of swap contracts. Net periodic payments received by the Fund are included as
part of realized gains (losses) and, in the case of accruals for periodic
payments, are included as part of unrealized appreciation (depreciation) on the
Statement of Operations.

(G) DISTRIBUTIONS TO SHAREHOLDERS

The Fund declares and pays monthly dividends to common shareholders. These
dividends consist of investment company taxable income, which generally includes
qualified dividend income, ordinary income and short-term capital gains. Any net
realized long-term gains are distributed annually to common shareholders.

Distributions to shareholders are recorded on the ex-dividend date. The amount
and timing of distributions are determined in accordance with federal income tax
regulations, which may differ from U.S. generally accepted accounting
principles.


l2 | SemiAnnual Report | April 30, 2008



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
NOTES TO FINANCIAL STATEMENTS (unaudited) continued


Note 3 - INVESTMENT MANAGEMENT AND ADVISORY AGREEMENTS AND OTHER AGREEMENTS:

Pursuant to an Investment Advisory Agreement (the "Agreement") between Claymore
Advisors, LLC (the "Adviser") and the Fund, the Adviser furnishes offices,
necessary facilities and equipment, provides administrative services to the
Fund, oversees the activities of Advent Capital Management, LLC (the "Investment
Manager"), provides personnel and pays the compensation of all Trustees and
Officers of the Fund who are its affiliates. As compensation for these services,
the Fund pays the Adviser an annual fee, payable monthly in arrears, at an
annual rate equal to 0.40% of the average Managed Assets during such month.
Managed Assets means the total of assets of the Fund (including any assets
attributable to any preferred shares or otherwise attributable to the use of
financial leverage, if any) less the sum of accrued liabilities.

Pursuant to an Investment Management Agreement between the Investment Manager
and the Fund, the Fund has agreed to pay the Investment Manager an annual fee,
payable monthly in arrears, at an annual rate equal to 0.60% of the average
Managed Assets during such month for the services and facilities provided by the
Investment Manager to the Fund. These services include the day-to-day management
of the Fund's portfolio of securities, which includes buying and selling
securities for the Fund and investment research. The Investment Manager also
provides personnel to the Fund and pays the compensation of all Trustees and
Officers of the Fund who are its affiliates.

The Bank of New York Mellon ("BNY") acts as the Fund's custodian, administrator
and transfer agent. As custodian, BNY is responsible for the custody of the
Fund's assets. As administrator, BNY is responsible for maintaining the books
and records of the Fund's securities and cash. As transfer agent, BNY is
responsible for performing transfer agency services for the Fund.

Certain Officers and Trustees of the Fund are also Officers and Directors of the
Adviser or Investment Manager. The Fund does not compensate its Officers or
Trustees who are Officers of the aforementioned firms.


Note 4 - FEDERAL INCOME TAXES:

The Fund intends to comply with the requirements of Subchapter M of the Internal
Revenue Code of 1986, as amended, applicable to regulated investment companies.
Accordingly, no provision for U.S. federal income taxes is required. In
addition, by distributing substantially all of its ordinary income and long-term
capital gains, if any, during each calendar year, the Fund intends not to be
subject to U.S. federal excise tax.

At April 30, 2008 the cost and related gross unrealized appreciation and
depreciation on investments for tax purposes, excluding written options and
foreign currency translations are as follows:


                                                            NET TAX UNREALIZED   NET TAX UNREALIZED
              COST OF         GROSS TAX         GROSS TAX         APPRECIATION      DEPRECIATION ON
          INVESTMENTS        UNREALIZED        UNREALIZED       (DEPRECIATION)      DERIVATIVES AND
     FOR TAX PURPOSES      APPRECIATION      DEPRECIATION       ON INVESTMENTS     FOREIGN CURRENCY
---------------------------------------------------------------------------------------------------
                                                                          
         $733,514,481       $20,357,105     $(66,673,222)        $(46,316,117)        $(15,148,891)


The differences between book basis and tax basis unrealized
appreciation/(depreciation) is attributable to the tax deferral of losses on
wash sales, straddles and additional income accrued for tax purposes on certain
convertible securities.

For the period ended October 31, 2007 the tax character of distributions paid,
as reflected in the Statement of Changes in Net Assets of $15,215,695 was
ordinary income. The final determination of the source of the 2008 distributions
for tax purposes will be made after the end of the Fund's fiscal year and will
be reported to shareholders in January 2009 on Form 1099-DIV.

On July 13, 2006, the Financial Accounting Standards Board ("FASB") released
FASB Interpretation No. 48, "Accounting for Uncertainty in Income Taxes" ("FIN
48"). FIN 48 provides guidance for how uncertain tax positions should be
recognized, measured, presented and disclosed in the financial statements. FIN
48 requires the evaluation of tax positions taken or expected to be taken in the
course of preparing the Fund's tax returns to determine whether the tax
positions are "more-likely-than-not" of being sustained by the applicable tax
authority. Tax positions not deemed to meet the more-likely-than-not threshold
would be recorded as a tax benefit or expense in the current year. Management
has evaluated the implication of FIN 48 and has determined it does not have any
impact on the financial statements as of April 30, 2008.


                                         SemiAnnual Report | April 30, 2008 | 13



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
NOTES TO FINANCIAL STATEMENTS (unaudited) continued


Note 5 - INVESTMENTS IN SECURITIES:

For the period ended April 30, 2008, purchases and sales of investments, other
than short-term securities, were $237,532,901 and $259,663,687 respectively.

The Fund entered into total return swap agreements during the period ended April
30, 2008 to potentially enhance return. Details of the swap agreements
outstanding as of April 30, 2008 are as follows:

TOTAL RETURN SWAPS


                                                                                                  NOTIONAL    PAYING      UNREALIZED
                                                                                   TERMINATION      AMOUNT  FLOATING    APPRECIATION
COUNTERPARTY          UNDERLYING TERM LOANS                                               DATE       (000)      RATE  (DEPRECIATION)
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                         
Citigroup             Georgia-Pacific Corp., US LIBOR + 1.75%, due 12/22/12         08/01/2008  $ 6,888(a)         -    $  (210,882)
Citigroup             Graphic Packaging International, Inc., US LIBOR + 2.00%,
                      due 05/16/14                                                  06/23/2008   14,528(a)         -       (526,540)
Citigroup             Health Management Associates, Inc., US LIBOR + 1.75%,
                      due 02/28/14                                                  07/30/2008    4,835(a)         -       (328,811)
Citigroup             Lifepoint Hospitals, Inc., US LIBOR + 1.625%, due 08/23/12    07/10/2008   15,120(a)         -       (720,456)
Citigroup             Yell Group PLC, US LIBOR + 2.00%, due 02/10/13                07/30/2008    5,006(a)         -       (631,250)
JPMorgan Chase & Co.  Bausch & Lomb, US LIBOR + 3.25%, due 04/26/15                 07/01/2008    3,378        3.43%        (96,250)
JPMorgan Chase & Co.  CCS International                                             07/01/2008   12,180(a)         -              -
JPMorgan Chase & Co.  Celanese Holdings LLC, US LIBOR + 1.75%, due 03/30/14         07/01/2008    9,554        3.43%       (186,694)
JPMorgan Chase & Co.  Community Health Systems, Inc., US LIBOR + 2.25%,
                      due 07/25/14                                                  07/01/2008   17,925        3.43%       (802,754)
JPMorgan Chase & Co.  Davita, Inc., US LIBOR + 1.50%, due 10/05/12                  07/01/2008   11,040        3.43%       (308,632)
JPMorgan Chase & Co.  Delta Air Lines, Inc., US LIBOR + 2.00%, due 04/30/12         07/01/2008   12,771        3.43%     (1,831,574)
JPMorgan Chase & Co.  Energy Future Holdings, US LIBOR + 3.50%, due 10/10/14        07/01/2008    3,801        3.43%       (137,785)
JPMorgan Chase & Co.  Energy Future Holdings, US LIBOR + 3.50%, due 10/10/14        07/01/2008    4,751        3.43%       (117,270)
JPMorgan Chase & Co.  Ford Motor Co., US LIBOR + 3.00%, due 12/15/13                07/01/2008   17,831        3.43%     (1,423,851)
JPMorgan Chase & Co.  Georgia-Pacific Corp., US LIBOR + 1.75%, due 12/22/12         08/01/2008    2,377        3.43%        (54,280)
JPMorgan Chase & Co.  HCA, Inc., US LIBOR + 2.75%, due 11/16/13                     07/01/2008   18,722        3.43%       (706,531)
JPMorgan Chase & Co.  Hertz Corp., US LIBOR + 2.50%, due 12/12/12                   07/01/2008    5,689        3.43%       (201,377)
JPMorgan Chase & Co.  Idearc, Inc., US LIBOR + 2.00%, due 11/17/14                  07/01/2008   10,736        3.43%     (2,078,224)
JPMorgan Chase & Co.  Isle of Capri Casinos, US LIBOR + 1.75%, due 07/26/14         07/01/2008    4,346        3.43%       (529,786)
JPMorgan Chase & Co.  Las Vegas Sands LLC, US LIBOR + 1.75%, due 05/23/14           07/01/2008   13,661        3.43%     (1,046,047)
JPMorgan Chase & Co.  Level 3 Communications, Inc., US LIBOR + 2.25%,
                      due 03/13/14                                                  07/01/2008   11,440        3.43%     (1,326,474)
JPMorgan Chase & Co.  Mac Gen LLC, US LIBOR + 2.25%, due 02/22/12                   07/01/2008    5,627        3.43%         18,116
JPMorgan Chase & Co.  Mac Gen LLC, US LIBOR + 7.50%, due 02/15/15                   07/01/2008    2,708        3.43%         27,132
JPMorgan Chase & Co.  Mirant North America LLC, US LIBOR + 1.75%, due 01/03/13      07/01/2008   10,896        3.43%       (221,578)
JPMorgan Chase & Co.  NRG Energy, Inc., US LIBOR + 1.75%, due 02/01/13              07/01/2008   12,347        3.43%       (472,609)
JPMorgan Chase & Co.  NRG Holdings, Inc., US LIBOR + 2.50%, due 06/08/14            07/01/2008    3,750        3.43%       (180,412)
JPMorgan Chase & Co.  R.H. Donnelley Inc., US LIBOR + 1.50%, due 06/30/11           07/01/2008   13,547        3.43%       (677,822)
JPMorgan Chase & Co.  Tenneco Automotive, Inc., US LIBOR + 1.75%, due 03/16/14      07/01/2008    1,468        3.43%       (130,553)
JPMorgan Chase & Co.  Time Warner Telecommunications Holdings, US LIBOR + 2.25%,
                      due 01/07/13                                                  07/01/2008    3,291        3.43%       (123,844)
JPMorgan Chase & Co.  Virgin Media Investment Holding, EURIBOR + 2.00%,
                      due 10/04/13                                                  07/01/2008    6,071        5.01%       (433,288)
JPMorgan Chase & Co.  Virgin Media Investment Holding, GB LIBOR + 2.125%,
                      due 10/04/13                                                  07/01/2008    6,253        5.88%       (547,004)
JPMorgan Chase & Co.  Yell Group PLC, US LIBOR + 2.00%, due 10/27/12                07/01/2008    1,770        3.46%       (228,226)
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                       $(16,235,556)
====================================================================================================================================

CREDIT DEFAULT SWAP AGREEMENTS


                                                                                  NOTIONAL       PAYING      UNREALIZED
                                                       BUY/SELL   TERMINATION       AMOUNT     FLOATING   APPRECIATION/
COUNTERPARTY          CREDIT DEFAULT SWAP AGREEMENT  PROTECTION          DATE        (000)         RATE   (DEPRECIATION)
------------------------------------------------------------------------------------------------------------------------
                                                                                         
JPMorgan Chase & Co.  AMR Corp.                            Sell    03/20/2013     $  1,250        8.80%    $   (296,421)
JPMorgan Chase & Co.  CDX NA HY S9 100 S                   Sell    12/20/2012       10,000        3.75%         546,676
------------------------------------------------------------------------------------------------------------------------
                                                                                                              $ 250,255
========================================================================================================================
                                                                                                           $(15,985,301)
========================================================================================================================

(a)  Not settled as of April 30, 2008.


14 | SemiAnnual Report | April 30, 2008



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
NOTES TO FINANCIAL STATEMENTS (unaudited) continued


For each swap noted, the Fund pays a floating rate and receives the total return
of the underlying asset. The market value of the swaps outstanding reflects the
current receivables and payables, which may have different payment dates.

The Fund entered into written option contracts during the period ended April 30,
2008. Details of the transactions were as follows:

                                          NUMBER OF CONTRACTS  PREMIUMS RECEIVED
--------------------------------------------------------------------------------
Options outstanding, beginning of period               5,350        $ 1,004,631
Options written during the period                     17,647          3,048,617
Options expired during the period                     (5,047)          (834,592)
Options closed during the period                      (9,575)        (1,657,167)
Options assigned during the period                    (6,850)        (1,145,561)
--------------------------------------------------------------------------------
Options outstanding, end of period                     1,525          $ 415,928
================================================================================

Note 6 - DERIVATIVES:
At April 30, 2008, the following forward exchange currency contracts were
outstanding:

                                                        LOCAL         UNREALIZED
                                                     CURRENCY      APPRECIATION/
SHORT CONTRACTS                                         VALUE     (DEPRECIATION)
--------------------------------------------------------------------------------
Canadian Dollar, 22,050,000 expiring 06/18/08      21,885,024       $    98,166
EURO, 36,600,000 expiring 06/18/08                 56,857,693          (602,363)
Japanese Yen, 1,475,500,000 expiring 06/18/08      14,161,607           259,583
Pound Sterling, 16,400,000 expiring 06/18/08       32,370,105           742,854
Swiss Franc, 22,100,000 expiring 06/18/08          21,231,314           251,909
--------------------------------------------------------------------------------
                                                                    $   750,149
================================================================================

Note 7 - CAPITAL:

COMMON SHARES

In connection with its organization process, the Fund sold 5,240 shares of
beneficial interest to Claymore Securities, Inc., an affiliate of the Adviser,
for consideration of $100,084 at a price of $19.10 per share. The Fund has an
unlimited amount of common shares, $0.001 par value, authorized and 31,867,616
issued and outstanding. Of this amount, the Fund issued 28,750,000 shares of
common stock in its initial public offering. On June 11, 2007, June 18, 2007 and
July 11, 2007, the Fund issued an additional 1,750,000 shares, 750,000 shares
and 555,900 shares, respectively, pursuant to an over allotment option. These
shares were issued at $19.10 per share after deducting the sales load but before
underwriters' expense reimbursement.

Offering costs, estimated at $1,272,236 or $0.04 per share, in connection with
the issuance of common shares have been borne by the Fund and were charged to
paid-in capital. The Adviser and Investment Manager have agreed to pay offering
expenses (other than sales load, but including reimbursement of expenses to the
underwriters) in excess of $0.04 per common share.

PREFERRED SHARES

On June 12, 2007, the Fund's Board of Trustees authorized the issuance of
Auction Market Preferred Shares ("AMPS"), as part of the Fund's leverage
strategy. AMPS issued by the Fund have seniority over the common shares.

On September 14, 2007, the Fund issued 3,400 shares of AMPS Series T7 and 3,400
shares of AMPS Series W7, each with a liquidation value of $25,000 per share
plus accrued dividends.

Offering costs, including the 1% sales charge associated with the issuance of
AMPS, estimated at $2,100,000 were borne by the common shareholders as a direct
reduction to paid-in-capital.


                                         SemiAnnual Report | April 30, 2008 | 15



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
NOTES TO FINANCIAL STATEMENTS (unaudited) continued


Dividends are accumulated daily at a rate set through an auction process.
Beginning February 13, 2008, the auction process resulted in a failed auction.
Provisions in the offering documents of the Fund's AMPS provide a mechanism to
set a maximum rate in the event of a failed auction, and thus, investors in the
Fund's AMPS will continue to be entitled to receive payment for holding these
AMPS. This maximum rate is determined based upon a multiple of or a spread to
LIBOR, whichever is greater. Distributions of net realized capital gains, if
any, are made annually.

For the period ended April 30, 2008, the annualized dividend rates ranged from:

                          HIGH            LOW         AT APRIL 30, 2008
-----------------------------------------------------------------------
Series T7                6.00%          3.88%                     3.96%
Series W7                6.00%          3.94%                     4.08%

The Fund is subject to certain limitations and restrictions while Preferred
Shares are outstanding. Failure to comply with these limitations and
restrictions could preclude the Fund from declaring any dividends or
distributions to common shareholders or repurchasing common shares and/or could
trigger the mandatory redemption on Preferred Shares at their liquidation value.

Preferred Shares, which are entitled to one vote per share, generally vote with
the common stock but vote separately as a class to elect two Trustees and on any
matters affecting the rights of the Preferred Shares.


Note 8 - INDEMNIFICATIONS:

In the normal course of business, the Fund enters into contracts that contain a
variety of representations, which provide general indemnifications. The Fund's
maximum exposure under these arrangements is unknown, as this would involve
future claims that may be made against the Fund that have not yet occurred.
However, the Fund expects the risk of loss to be remote.


Note 9 - SUBSEQUENT EVENT:

Subsequent to April 30, 2008, the Fund declared on May 1, 2008 and June 2, 2008,
monthly dividends to common shareholders of $0.1458 per common share. These
dividends are payable on May 30, 2008 and June 30, 2008 to shareholders of
record on May 15, 2008 and June 13, 2008 respectively.

On March 11, 2008, the Board of Trustees approved Claymore Advisors, LLC to
replace BNY as the Fund Administration Agent effective May 1, 2008.


Note 10 - ACCOUNTING PRONOUNCEMENTS:

In September 2006, the FASB released Statement of Financial Accounting Standards
No. 157, "Fair Value Measurements" ("FAS 157"). This standard clarifies the
definition of fair value for financial reporting, establishes a framework for
measuring fair value and requires additional disclosures about the use of fair
value measurements. FAS 157 is effective for financial statements issued for
fiscal years beginning after November 15, 2007 and interim periods within those
fiscal years. As of April 30, 2008, the Fund does not believe the adoption of
FAS 157 will impact the amounts reported in the financial statements, however,
additional disclosure will be required about the inputs used to develop
measurements of fair value and the effect of certain of the measurements
reported in the Statement of Operations for a fiscal period.

In March 2008, the FASB issued SFAS No. 161, "Disclosures about Derivative
Instruments and Hedging Activities." This standard is intended to enhance
financial statement disclosures for derivative instruments and hedging
activities and enable investors to understand: a) how and why a fund uses
derivative instruments, b) how derivatives instruments and related hedge fund
items are accounted for, and c) how derivative instruments and related hedge
items affect a fund's financial position, results of operations and cash flows.
SFAS No. 161 is effective for financial statements issued for fiscal years and
interim periods beginning after November 15, 2008. As of April 30, 2008,
management does not believe the adoption of SFAS No. 161 will impact the
financial statement amounts; however, additional footnote disclosures may be
required about the use of derivative instruments and hedging items.


l6 | SemiAnnual Report | April 30, 2008



                       This Page Intentionally Left Blank.



AGC | Advent/Claymore Global Convertible Securities & Income Fund

Supplemental INFORMATION | (unaudited)


FEDERAL INCOME TAX INFORMATION
In January 2009, you will be advised on IRS Form 1099 DIV or substitute 1099 DIV
as to the federal tax status of the distributions received by you in the
calendar year 2008.




TRUSTEES
The Trustees of the Advent/Claymore Global Convertible Securities & Income Fund
and their principal occupations during the past five years:



                                                                                          NUMBER OF
                                                                                          FUNDS IN
                                                                                          THE FUND    OTHER
NAME, ADDRESS, YEAR       TERM OF OFFICE*  PRINCIPAL OCCUPATIONS DURING                   COMPLEX**   DIRECTORSHIPS
OF BIRTH AND POSITION(S)  AND LENGTH OF    THE PAST FIVE YEARS AND                        OVERSEEN    HELD BY
HELD WITH REGISTRANT      TIME SERVED      OTHER AFFILIATIONS                             BY TRUSTEE  TRUSTEE
------------------------------------------------------------------------------------------------------------------------------------
INDEPENDENT TRUSTEES:
------------------------------------------------------------------------------------------------------------------------------------
                                                                                          
Daniel Black+             Since 2007       Partner, the Wicks Group of Cos., LLC          3           Director of Penn Foster
Year of birth: 1960                        (2003-present). Formerly, Managing Director                Education Group,  Inc.
Trustee                                    and Co-head of the Merchant Banking Group at
                                           BNY Capital Markets, a division of The Bank
                                           of New York Co., Inc. (1998-2003).

Randall C. Barnes++       Since 2007       Investor (2001-present). Formerly, Senior      41          None.
Year of birth: 1951                        Vice President, Treasurer (1993-1997),
Trustee                                    President, Pizza Hut International
                                           (1991-1993) and Senior Vice President,
                                           Strategic Planning and New Business
                                           Development (1987-1990) of PepsiCo, Inc.
                                           (1987-1997).

Derek Medina+             Since 2007       Senior Vice President, Business Affairs and    3           Director of Young Scholar's
Year of birth: 1966                        News Planning at ABC News (2008-present).                  Institute.
Trustee                                    Vice President, Business Affairs and News
                                           Planning at ABC News (2003-2008). Formerly,
                                           Executive Director, Office of the President
                                           at ABC News (2000-2003). Former Associate at
                                           Cleary Gottlieb Steen & Hamilton (law firm)
                                           (1995-1998). Former associate in Corporate
                                           Finance at J.P. Morgan/ Morgan Guaranty
                                           (1988-1990).

Ronald A. Nyberg++        Since 2007       Partner of Nyberg & Cassioppi, LLC., a law     44          None.
Year of birth: 1953                        firm specializing in corporate law, estate
Trustee                                    planning and business transactions
                                           (2000-present). Formerly, Executive Vice
                                           President, General Counsel and Corporate
                                           Secretary of Van Kampen Investments
                                           (1982-1999).

Gerald L. Seizert, CFP+   Since 2007       Chief Executive Officer of Seizert Capital     3           Former Director of Loomis,
Year of birth: 1952                        Partners, LLC, where he directs the equity                 Sayles and Co., L.P
Trustee                                    disciplines of the firm and serves as a
                                           co-manager of the firm's hedge fund, Proper
                                           Associates, LLC (2000-present). Formerly,
                                           Co-Chief Executive (1998-1999) and a
                                           Managing Partner and Chief Investment
                                           Officer-Equities of Munder Capital
                                           Management, LLC (1995-1999). Former Vice
                                           President and Portfolio Manager of Loomis,
                                           Sayles & Co., L.P. (asset manager)
                                           (1984-1995). Former Vice President and
                                           Portfolio Manager at First of America Bank
                                           (1978-1984).

Michael A. Smart+         Since 2007       Managing Partner, Cordova, Smart & Williams,   3           Director, Country
Year of birth: 1960                        LLC, Advisor First Atlantic Capital Ltd.,                  Pure Foods.
Trustee                                    (2001-present). Formerly, a Managing                       Chairman, Board of
                                           Director in Investment Banking-The Private                 Directors, Berkshire
                                           Equity Group (1995-2001) and a Vice                        Blanket, Inc.
                                           President in Investment Banking-Corporate                  President and
                                           Finance (1992-1995) at Merrill Lynch & Co.                 Chairman, Board of
                                           Founding Partner of The Carpediem Group,                   Directors, Sqwincher
                                           (1991-1992). Associate at Dillon, Read and                 Holdings. Board of
                                           Co. (investment bank) (1988-1990).                         Directors, Sprint
                                                                                                      Industrial Holdings,
                                                                                                      Co-chair of the
                                                                                                      Board of H2O plus.



l8 | SemiAnnual Report | April 30, 2008



AGC | Advent/Claymore Global Convertible Securities & Income Fund |
SUPPLEMENTAL INFORMATION (unaudited) continued


                                                                                          NUMBER OF
                                                                                          FUNDS IN
                                                                                          THE FUND    OTHER
NAME, ADDRESS, YEAR       TERM OF OFFICE*  PRINCIPAL OCCUPATIONS DURING                   COMPLEX**   DIRECTORSHIPS
OF BIRTH AND POSITION(S)  AND LENGTH OF    THE PAST FIVE YEARS AND                        OVERSEEN    HELD BY
HELD WITH REGISTRANT      TIME SERVED      OTHER AFFILIATIONS                             BY TRUSTEE  TRUSTEE
------------------------------------------------------------------------------------------------------------------------------------
INTERESTED TRUSTEES:
------------------------------------------------------------------------------------------------------------------------------------
                                                                                          
Tracy V. Maitland+0       Since 2007       President of Advent Capital                    3           None.
Year of birth: 1960                        Management, LLC, which he
Trustee, President                         founded in 1995. Prior to June,
and Chief                                  2001, President of Advent
Executive Officer                          Capital Management, a division
                                           of Utendahl Capital.

Nicholas Dalmaso++00      Since 2007       Formerly, Senior Managing                      44          None.
Year of birth: 1965                        Director and Chief
Trustee                                    Administrative Officer
                                           (2007-2008) and General Counsel
                                           (2001-2007) of Claymore
                                           Advisors, LLC and Claymore
                                           Securities, Inc. Formerly,
                                           Assistant General Counsel, John
                                           Nuveen and Co., Inc.
                                           (1999-2000). Former Vice
                                           President and Associate General
                                           Counsel of Van Kampen
                                           Investments, Inc. (1992-1999).

+    Address for all Trustees noted: 1065 Avenue of the Americas, 31st Floor,
     New York, NY 10018.

++   Address for all Trustees noted: 2455 Corporate West Drive, Lisle, IL 60532

*    After a Trustee's initial term, each Trustee is expected to serve a
     three-year term concurrent with the class of Trustees for which he serves:

     -    Messrs. Seizert, Medina and Barnes, as Class I Trustees, are expected
          to stand for re-election at the Fund's 2010 annual meeting of
          shareholders.

     -    Messrs. Smart, Nyberg and Black, as Class II Trustees, are expected to
          stand for re-election at the Fund's 2008 annual meeting of
          shareholders.

     -    Messrs. Maitland and Dalmaso, as Class III Trustees, are expected to
          stand for re-election at the Fund's 2009 annual meeting of
          shareholders.

**   The Claymore Fund Complex consists of U.S. registered investment companies
     advised or serviced by Claymore Advisors, LLC or Claymore Securities, Inc.
     The Claymore Fund Complex is overseen by multiple Boards of Trustees.

0    Mr. Maitland is an "interested person" (as defined in section 2(a)(19) of
     the 1940 Act) of the Fund because of his position as an officer of Advent
     Capital Management, LLC, the Fund's Investment Manager.

00   Mr. Dalmaso is an "interested person" (as defined in section 2(a)(19) of
     the 1940 Act) of the Fund as a result of his position as an officer
     (through May 13, 2008) of and his equity ownership in the Adviser and
     certain of its affiliates.



OFFICERS
The officers of the Advent/Claymore Global Convertible Securities & Income Fund
and their principal occupations during the past five years:


NAME, ADDRESS*, YEAR OF BIRTH AND      TERM OF OFFICE** AND       PRINCIPAL OCCUPATIONS DURING THE PAST FIVE YEARS
POSITION(S) HELD WITH REGISTRANT       LENGTH OF TIME SERVED      AND OTHER AFFILIATIONS
------------------------------------------------------------------------------------------------------------------------------------
OFFICERS:
------------------------------------------------------------------------------------------------------------------------------------
                                                            
F. Barry Nelson                        Since 2007                 Co-Portfolio Manager at Advent Capital Management, LLC
Year of birth: 1943                                               (2001- present). Prior to June 2001, Mr. Nelson held the
Vice President and                                                same position at Advent Capital Management, a division of
Assistant Secretary                                               Utendahl Capital.

Robert White                           Since 2007                 Chief Financial Officer, Advent Capital Management, LLC
Year of birth: 1965                                               (2005-present). Previously, Vice President, Client Service
Treasurer and Chief                                               Manager, Goldman Sachs Prime Brokerage (1997-2005).
Financial Officer

Rodd Baxter                            Since 2007                 General Counsel, Advent Capital Management, LLC
Year of birth: 1950                                               (2002-present). Formerly, Director and Senior Counsel, SG
Secretary and Chief                                               Cowen Securities Corp. (1998-2002).
Compliance Officer

*    Address for all Officers: 1065 Avenue of the Americas, 31st Floor, New
     York, NY 10018

**   Officers serve at the pleasure of the Board of Trustees and until his or
     her successor is appointed and qualified or until his or her earlier
     resignation or removal.

                                         SemiAnnual Report | April 30, 2008 | 19



AGC | Advent/Claymore Global Convertible Securities & Income Fund

Dividend Reinvestment PLAN | (unaudited)


Unless the registered owner of common shares elects to receive cash by
contacting the Plan Administrator, all dividends declared on common shares of
the Fund will be automatically reinvested by The Bank of New York Mellon (the
"Plan Administrator"), Administrator for shareholders in the Fund's Dividend
Reinvestment Plan (the "Plan"), in additional common shares of the Fund.
Participation in the Plan is completely voluntary and may be terminated or
resumed at any time without penalty by notice if received and processed by the
Plan Administrator prior to the dividend record date; otherwise such termination
or resumption will be effective with respect to any subsequently declared
dividend or other distribution. Some brokers may automatically elect to receive
cash on your behalf and may re-invest that cash in additional common shares of
the Fund for you. If you wish for all dividends declared on your common shares
of the Fund to be automatically reinvested pursuant to the Plan, please contact
your broker.

The Plan Administrator will open an account for each common shareholder under
the Plan in the same name in which such common shareholder's common shares are
registered. Whenever the Fund declares a dividend or other distribution
(together, a "Dividend") payable in cash, non-participants in the Plan will
receive cash and participants in the Plan will receive the equivalent in common
shares. The common shares will be acquired by the Plan Administrator for the
participants' accounts, depending upon the circumstances described below, either
(i) through receipt of additional unissued but authorized common shares from the
Fund ("Newly Issued Common Shares") or (ii) by purchase of outstanding common
shares on the open market ("Open-Market Purchases") on the New York Stock
Exchange or elsewhere. If, on the payment date for any Dividend, the closing
market price plus estimated brokerage commission per common share is equal to or
greater than the net asset value per common share, the Plan Administrator will
invest the Dividend amount in Newly Issued Common Shares on behalf of the
participants. The number of Newly Issued Common Shares to be credited to each
participant's account will be determined by dividing the dollar amount of the
Dividend by the net asset value per common share on the payment date; provided
that, if the net asset value is less than or equal to 95% of the closing market
value on the payment date, the dollar amount of the Dividend will be divided by
95% of the closing market price per common share on the payment date. If, on the
payment date for any Dividend, the net asset value per common share is greater
than the closing market value plus estimated brokerage commission, the Plan
Administrator will invest the Dividend amount in common shares acquired on
behalf of the participants in Open-Market Purchases.

If, before the Plan Administrator has completed its Open-Market Purchases, the
market price per common share exceeds the net asset value per common share, the
average per common share purchase price paid by the Plan Administrator may
exceed the net asset value of the common shares, resulting in the acquisition of
fewer common shares than if the Dividend had been paid in Newly Issued Common
Shares on the Dividend payment date. Because of the foregoing difficulty with
respect to Open-Market Purchases, the Plan provides that if the Plan
Administrator is unable to invest the full Dividend amount in Open-Market
Purchases during the purchase period or if the market discount shifts to a
market premium during the purchase period, the Plan Administrator may cease
making Open-Market Purchases and may invest the uninvested portion of the
Dividend amount in Newly Issued Common Shares at net asset value per common
share at the close of business on the Last Purchase Date provided that, if the
net asset value is less than or equal to 95% of the then current market price
per common share; the dollar amount of the Dividend will be divided by 95% of
the market price on the payment date.

The Plan Administrator maintains all shareholders' accounts in the Plan and
furnishes written confirmation of all transactions in the accounts, including
information needed by shareholders for tax records. Common shares in the account
of each Plan participant will be held by the Plan Administrator on behalf of the
Plan participant, and each shareholder proxy will include those shares purchased
or received pursuant to the Plan. The Plan Administrator will forward all proxy
solicitation materials to participants and vote proxies for shares held under
the Plan in accordance with the instruction of the participants.

There will be no brokerage charges with respect to common shares issued directly
by the Fund. However, each participant will pay a pro rata share of brokerage
commission incurred in connection with Open-Market Purchases. The automatic
reinvestment of Dividends will not relieve participants of any Federal, state or
local income tax that may be payable (or required to be withheld) on such
Dividends.

The Fund reserves the right to amend or terminate the Plan. There is no direct
service charge to participants with regard to purchases in the Plan; however,
the Fund reserves the right to amend the Plan to include a service charge
payable by the participants.

All correspondence or questions concerning the Plan should be directed to the
Plan Administrator, The Bank of New York Mellon, Attention: Stock Transfer
Department, 101 Barclay 11E, New York, NY 10286, Phone Number: (866) 488-3559.


20 | SemiAnnual Report | April 30, 2008



                       This Page Intentionally Left Blank.



AGC | Advent/Claymore Global Convertible Securities & Income Fund


Fund INFORMATION |


BOARD OF TRUSTEES

Randall C. Barnes

Daniel Black

Nicholas Dalmaso*

Tracy V. Maitland**
Chairman

Derek Medina

Ronald A. Nyberg

Gerald L. Seizert

Michael A. Smart


*    Trustee is an "interested person" of the Fund as defined in the Investment
     Company Act of 1940, as amended, as a result of his position as an officer
     (through May 13, 2008) of and his equity ownership in the Adviser and
     certain of its affiliates.

**   Trustee is an "interested person" of the Fund as defined in the Investment
     Company Act of 1940, as amended.



OFFICERS

Tracy V. Maitland
President and Chief Executive Officer

F. Barry Nelson
Vice President and Assistant Secretary

Robert White
Treasurer and Chief Financial Officer

Rodd Baxter
Secretary and Chief Compliance Officer

INVESTMENT MANAGER

Advent Capital Management, LLC
New York, New York

INVESTMENT ADVISER AND ADMINISTRATOR (EFFECTIVE MAY 1, 2008)

Claymore Advisors, LLC
Lisle, Illinois

ADMINISTRATOR (THROUGH APRIL 30, 2008),
CUSTODIAN AND TRANSFER AGENT

The Bank of New York Mellon
New York, New York

PREFERRED STOCK-
DIVIDEND PAYING AGENT

The Bank of New York Mellon
New York, New York

LEGAL COUNSEL

Skadden, Arps, Slate,
Meagher & Flom LLP
New York, New York

INDEPENDENT REGISTERED
PUBLIC ACCOUNTING FIRM

PricewaterhouseCoopers LLP
New York, New York


--------------------------------------------------------------------------------
PRIVACY PRINCIPLES OF THE FUND

The Fund is committed to maintaining the privacy of its shareholders and to
safeguarding their non-public personal information. The following information is
provided to help you understand what personal information the Fund collects, how
the Fund protects that information and why, in certain cases, the Fund may share
information with select other parties.

Generally, the Fund does not receive any non-public personal information
relating to its shareholders, although certain non-public personal information
of its shareholders may become available to the Fund. The Fund does not disclose
any non-public personal information about its shareholders or former
shareholders to anyone, except as permitted by law or as is necessary in order
to service shareholder accounts (for example, to a transfer agent or third party
administrator).

The Fund restricts access to non-public personal information about its
shareholders to employees of the Fund's investment adviser and its affiliates
with a legitimate business need for the information. The Fund maintains
physical, electronic and procedural safeguards designed to protect the
non-public personal information of its shareholders.

QUESTIONS CONCERNING YOUR SHARES OF ADVENT/CLAYMORE GLOBAL CONVERTIBLE
SECURITIES & INCOME FUND?

o    If your shares are held in a Brokerage Account, contact your Broker.

o    If you have physical possession of your shares in certificate form, contact
     the Fund's Custodian and Transfer Agent: The Bank of New York Mellon, 101
     Barclay 11E, New York, NY 10286; (866) 488-3559.

This report is sent to shareholders of Advent/Claymore Global Convertible
Securities & Income Fund for their information. It is not a Prospectus, circular
or representation intended for use in the purchase or sale of shares of the Fund
or of any securities mentioned in this report.

A description of the Fund's proxy voting policies and procedures related to
portfolio securities is available without charge, upon request, by calling the
Fund at (866) 274-2227.

Information regarding how the Fund voted proxies for portfolio securities, if
applicable, during the most recent 12-month period ended June 30, is also
available, without charge and upon request by calling the Fund at (866) 274-2227
or by accessing the Fund's Form N-PX on the U.S. Securities &Exchange
Commission's ("SEC") website at http://www.sec.gov.

The Fund files its complete schedule of portfolio holdings with the SEC for the
first and third quarters of each fiscal year on Form N-Q. The Fund's Form N-Q is
available on the SEC website at http://www.sec.gov. The Fund's Form N-Q may also
be viewed and copied at the SEC's Public Reference Room in Washington, DC;
information on the operation of the Public Reference Room may be obtained by
calling (800) SEC-0330 or at http://www.sec.gov.

In October 2007, the Fund submitted a CEO annual certification to the New York
Stock Exchange ("NYSE") in which the Fund's principal executive officer
certified that he was not aware, as of the date of the certification, of any
violation by the Fund of the NYSE's Corporate Governance listing standards. In
addition, as required by Section 302 of the Sarbanes-Oxley Act of 2002 and
related SEC rules, the Fund's principal executive and principal financial
officers have made quarterly certifications, included in filings with the SEC on
Forms N-CSR and N-Q, relating to, among other things, the Fund's disclosure
controls and procedures and internal control over financial reporting.


22 | SemiAnnual Report | April 30, 2008



ADVENT CAPITAL MANAGEMENT, LLC
1065 Avenue of the Americas
New York, New York 10018

                                                                        AGC
                                                                       LISTED
                                                                       NYSE(R)

                                                                    AGC-SAR-0408



ITEM 2. CODE OF ETHICS.

Not applicable for a semi-annual reporting period.

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

Not applicable for a semi-annual reporting period.

ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Not applicable for a semi-annual reporting period.

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable for a semi-annual reporting period.

ITEM 6. SCHEDULE OF INVESTMENTS.

The Schedule of Investments is included as part of Item 1.

ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END
MANAGEMENT INVESTMENT COMPANIES.

Not applicable for a semi-annual reporting period.

ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

(a)  Not applicable for a semi-annual reporting period.

(b)  There has been no change, as of the date of this filing, in the Portfolio
     Manager identified in response to paragraph (a)(1) of this Item in the
     registrant's most recent annual report on Form N-CSR.

ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT
COMPANY AND AFFILIATED PURCHASERS.

None.

ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

The registrant has not made any material changes to the procedures by which
shareholders may recommend nominees to the registrant's Board of Trustees.

ITEM 11. CONTROLS AND PROCEDURES.

(a)  The registrant's principal executive officer and principal financial
     officer have evaluated the registrant's disclosure controls and procedures
     (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) as
     of a date within 90 days of this filing and have concluded based on such
     evaluation, that the registrant's disclosure controls and procedures were
     effective, as of that date, in ensuring that information required to be
     disclosed by the registrant in this Form N-CSR was recorded, processed,
     summarized, and reported within the time periods specified in the
     Securities and Exchange Commission's rules and forms.

(b)  There were no changes in the registrant's internal control over financial
     reporting (as defined in Rule 30a-3(d) under the Investment Company Act of
     1940) that occurred during the registrant's second fiscal quarter of the
     period covered by this report that have materially affected, or are
     reasonably likely to materially affect, the registrant's internal control
     over financial reporting.

ITEM 12.  EXHIBITS.

(a)(1) Not applicable.

(a)(2) Certification of principal executive officer and principal financial
       officer pursuant to Rule 30a-2(a) of the Investment Company Act of 1940.

(a)(3) Not Applicable.

(b)    Certification of principal executive officer and principal financial
       officer pursuant to Rule 30a-2(b) of the Investment Company Act of 1940.



                                   SIGNATURES



         Pursuant to the requirements of the Securities Exchange Act of 1934 and
the Investment Company Act of 1940, the registrant has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant) Advent/Claymore Global Convertible Securities & Income Fund

By:      /s/ Tracy V. Maitland
         -----------------------------------------------------------------------

Name:    Tracy V. Maitland

Title:   President and Chief Executive Officer

Date:    August 6, 2008

         Pursuant to the requirements of the Securities Exchange Act of 1934 and
the Investment Company Act of 1940, this report has been signed by the following
persons on behalf of the registrant and in the capacities and on the dates
indicated.

By:      /s/ Tracy V. Maitland
         -----------------------------------------------------------------------

Name:    Tracy V. Maitland

Title:   President and Chief Executive Officer

Date:    August 6, 2008

By:      /s/ Robert White
         -----------------------------------------------------------------------

Name:    Robert White

Title:   Treasurer and Chief Financial Officer

Date:    August 6, 2008