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UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
Washington,D.C.20549

FORM N-CSRS

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
INVESTMENT COMPANIES

Investment Company Act file number 811-06499

Name of Fund: BlackRock MuniYield California Fund, Inc. (MYC)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock
MuniYield California Fund, Inc., 55 East 52nd Street, New York, NY 10055.

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 07/31/2010

Date of reporting period: 01/31/2010

Item 1 – Report to Stockholders



EQUITIES FIXED INCOME REAL ESTATE LIQUIDITY ALTERNATIVES BLACKROCK SOLUTIONS

Semi-Annual Report

JANUARY 31, 2010 I (UNAUDITED)

BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE)

BlackRock MuniYield Arizona Fund, Inc. (MZA)

BlackRock MuniYield California Fund, Inc. (MYC)

BlackRock MuniYield Investment Fund (MYF)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)

NOT FDIC INSURED

MAY LOSE VALUE

NO BANK GUARANTEE


Table of Contents   
  Page 
Dear Shareholder  3 
Semi-Annual Report:   
Fund Summaries  4 
The Benefits and Risks of Leveraging  9 
Derivative Financial Instruments  9 
Financial Statements:   
   Schedules of Investments  10 
   Statements of Assets and Liabilities  26 
   Statements of Operations  27 
   Statements of Changes in Net Assets  28 
   Statements of Cash Flows  31 
Financial Highlights  32 
Notes to Financial Statements  37 
Officers and Directors  43 
Additional Information  44 

2 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Dear Shareholder

Over the past year, investors worldwide witnessed a seismic shift in market sentiment as guarded optimism replaced the fear and pessimism that had domi-

nated since late 2007. The single most important reason for this change was the swing from a severe economic recession to an emergent global recovery.

At the start of 2009, markets were reeling from the virtually unprecedented global financial and economic meltdown. The looming threat of further collapse in

global markets prompted stimulus packages and central bank interventions on an extraordinary scale. By period end, these actions had helped stabilize the

financial system, and the economic contraction abated.

After reaching a trough in March 2009, stocks galloped higher as the massive, coordinated global monetary and fiscal stimulus began to re-inflate world

economies. Sidelined cash poured into the markets, triggering a dramatic and steep upward rerating of stocks and other risk assets. Still, the rally has not

been without interruption, as mixed economic data, global challenges regarding sovereign credit risk and proposed fees and levies on banks had begun to

dampen investor conviction toward period end. The experience in international markets generally mirrored that seen in the United States; notably, emerging

markets firmly reclaimed their leadership status.

The easing of investor risk aversion was notable in the fixed income markets as well, where non-Treasury assets made a robust recovery. One of the major

themes over the past year was the reversal of the flight-to-quality trade. High yield finished the period as the strongest-performing fixed income sector in both

the taxable and tax-exempt space. Overall, the municipal market made a strong showing as technical conditions remained supportive of the asset class. The

Build America Bond program was deemed a success, adding $65 billion of taxable supply to the municipal marketplace in 2009 and $4 billion so far this

year. The program continues to alleviate tax-exempt supply pressure and attract the attention of a global audience. However, fundamental concerns are moving

to the fore in the municipal space, and bear close watching as the year progresses. At the same time, yields on money market securities declined throughout

the reporting period and remain near all-time lows, with the Federal Open Market Committee reiterating that economic circumstances are likely to necessitate

an accommodative interest rate stance for an “extended period.” Investor assets in money market funds declined from the peak registered in early 2009, but

remain well above pre-crisis levels.

All told, the rebound in sentiment and global market conditions resulted in positive 6- and 12-month returns for nearly every major benchmark index, with the

most dramatic improvement seen among risk assets.

Total Returns as of January 31, 2010  6-month  12-month 
US equities (S&P 500 Index)   9.87%  33.14% 
Small cap US equities (Russell 2000 Index)   8.86  37.82 
International equities (MSCI Europe, Australasia, Far East Index)   6.93  39.68 
3-month Treasury bill (BofA Merrill Lynch 3-Month Treasury Bill Index)   0.10  0.22 
US Treasury securities (BofA Merrill Lynch 10-Year US Treasury Index)   0.62  (3.31) 
Taxable fixed income (Barclays Capital US Aggregate Bond Index)   3.87  8.51 
Tax-exempt fixed income (Barclays Capital Municipal Bond Index)   4.90  9.49 
High yield bonds (Barclays Capital US Corporate High Yield 2% Issuer Capped Index)  15.90  50.80 

Past performance is no guarantee of future results. Index performance shown for illustrative purposes only. You cannot invest directly in an index.

The market environment continues to improve, but questions about the strength and sustainability of the recovery abound. Through periods of market

uncertainty, BlackRock’s full resources are dedicated to the management of our clients’ assets. For additional market perspective and investment insight,

visit www.blackrock.com/shareholdermagazine, where you’ll find the most recent issue of our award-winning Shareholder® magazine, as well as its quarterly

companion newsletter, Shareholder Perspectives. As always, we thank you for entrusting BlackRock with your investments, and we look forward to your

continued partnership in the months and years ahead.


THIS PAGE NOT PART OF YOUR FUND REPORT

3


Fund Summary as of January 31, 2010

BlackRock Muni New York Intermediate Duration Fund, Inc.

Investment Objective

BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE) (the “Fund”) seeks to provide shareholders with high current income exempt from fed-
eral income taxes and New York State and New York City personal income taxes by investing primarily in a portfolio of municipal obligations, the interest on
which, in the opinion of bond counsel to the issuer, is exempt from federal income taxes and New York State and New York City personal income taxes.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended January 31, 2010, the Fund returned 10.07% based on market price and 9.91% based on net asset value (“NAV”). For the same
period, the closed-end Lipper Intermediate Municipal Debt Funds category posted an average return of 8.93% based on market price and 8.00% on a NAV
basis. All returns reflect reinvestment of dividends. The Fund’s discount to NAV, which narrowed during the period, accounts for the difference between per-
formance based on price and performance based on NAV. During the six months, the Fund was positioned primarily on the long end of the yield curve,
within its intermediate duration mandate. This positioning, along with exposure to lower-investment-grade bonds, contributed to the Fund’s outperformance,
as the municipal market continued to recover throughout the reporting period. Exposure to housing, health and corporate-backed municipal credits further
aided returns, as credit spreads narrowed and some of the more depressed sectors showed the greatest improvement. On the other hand, the Fund’s
higher-coupon bonds with shorter call protection detracted from performance for the period, as their shorter duration and negative convexity caused them
to lag. A below-average accrual rate was a negative factor, as well.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information             
  Symbol on New York Stock Exchange (“NYSE”)          MNE 
  Initial Offering Date        August 1, 2003 
  Yield on Closing Market Price as of January 31, 2010 ($12.43)1          5.36% 
  Tax Equivalent Yield2          8.25% 
  Current Monthly Distribution per Common Share3          $0.0555 
  Current Annualized Distribution per Common Share3          $0.6660 
  Leverage as of January 31, 20104          34% 
     1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.   
         Past performance does not guarantee future results.           
     2 Tax equivalent yield assumes the maximum federal tax rate of 35%.           
     3 The distribution is not constant and is subject to change.           
     4 Represents Auction Market Preferred Shares (“Preferred Shares”) and tender option bond trusts (“TOBs”) as a percentage of total managed assets, 
  which is the total assets of the Fund, including any assets attributable to Preferred Shares and TOBs, minus the sum of accrued liabilities. For a 
discussion of leveraging techniques utilized by the Fund, please see The Benefits and Risks of Leveraging on page 9.
  The table below summarizes the changes in the Fund’s market price and NAV per share:       
    1/31/10  7/31/09  Change  High  Low 
  Market Price  $12.43  $11.60  7.16%  $12.88  $11.54 
  Net Asset Value  $13.90  $12.99  7.01%  $14.27  $12.98 

The following charts show the sector and credit quality allocations of the Fund’s long-term investments:

     Sector Allocations     
  1/31/10  7/31/09 
Health       18%  18% 
Transportation  15  16 
State  15  14 
County/City/Special District/     
   School District  14  17 
Housing  11  11 
Corporate  10  8 
Education  9  8 
Utilities  7  7 
Tobacco  1  1 

     Credit Quality Allocations5     
  1/31/10  7/31/09 
AAA/Aaa  7%  9% 
AA/Aa  28  31 
A  34  31 
BBB/Baa  19  19 
BB/Ba  5  4 
CCC/Caa  2  2 
Not Rated6  5  4 

5 Using the higher of Standard & Poor’s (“S&P”) or Moody’s Investors
Service (“Moody’s”) ratings.
6 The investment advisor has deemed certain of these non-rated
securities to be of investment grade quality. As of January 31, 2010
and July 31, 2009, the market value of these securities was
$1,690,608, representing 2% and $1,646,778, representing 2%,
respectively, of the Fund’s long-term investments.

4 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Fund Summary as of January 31, 2010

BlackRock MuniYield Arizona Fund, Inc.

Investment Objective

BlackRock MuniYield Arizona Fund, Inc. (MZA) (the “Fund”) seeks to provide shareholders with as high a level of current income exempt from federal
and Arizona income taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-term,
investment grade municipal obligations, the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal and Arizona income taxes.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended January 31, 2010, the Fund returned 2.55% based on market price and 10.51% based on NAV. For the same period, the closed-
end Lipper Other States Municipal Debt Funds category posted an average return of 10.04% based on market price and 8.96% on a NAV basis. All returns
reflect reinvestment of dividends. The Fund moved from a premium to NAV to a discount by period end, which accounts for the difference between perform-
ance based on price and performance based on NAV. The primary contributors to relative performance were the Fund’s positive positioning with respect to
the market during a period in which yields generally declined, and its exposure to the long end of the yield curve, which outperformed as the yield curve
flattened. Exposure to lower-rated credits also aided results as yield spreads generally tightened during the period. Returns were hindered by the Fund’s
exposure to zero-coupon holdings, which generally underperformed the market as yield spreads in this sector widened.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information     
  Symbol on NYSE Amex  MZA 
  Initial Offering Date  October 29, 1993 
  Yield on Closing Market Price as of January 31, 2010 ($12.78)1  6.29% 
  Tax Equivalent Yield2  9.68% 
  Current Monthly Distribution per Common Share3  $0.067 
  Current Annualized Distribution per Common Share3  $0.804 
  Leverage as of January 31, 20104  40% 

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 Tax equivalent yield assumes the maximum federal tax rate of 35%.
3 The Monthly Distribution per Share, declared on March 1, 2010, was increased to $0.0695. The Yield on Closing Market Price, Current Monthly
Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution
rate is not constant and is subject to further change in the future.
4 Represents Preferred Shares and TOBs as a percentage of total managed assets, which is the total assets of the Fund, including any assets attributa-
ble to Preferred Shares and TOBs, minus the sum of accrued liabilities. For a discussion of leveraging techniques utilized by the Fund, please see The
Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  1/31/10  7/31/09  Change  High  Low 
Market Price  $12.78  $12.85  (0.54)%  $13.90  $12.06 
Net Asset Value  $13.29  $12.40  7.18%  $13.81  $12.38 

The following charts show the sector and credit quality allocations of the Fund’s long-term investments:

     Sector Allocations     
  1/31/10  7/31/09 
County/City/Special District/     
   School District     28%     25% 
Utilities  20  19 
State  16  17 
Health  12  13 
Education  12  12 
Housing  7  8 
Transportation  5  5 
Corporate    1 

     Credit Quality Allocations5     
  1/31/10  7/31/09 
AAA/Aaa   27%  25% 
AA/Aa  21  22 
A  29  29 
BBB/Baa  17  19 
BB/Ba  1  1 
B  1  1 
Not Rated6  4  3 

5 Using the higher of S&P’s or Moody’s ratings.
6 The investment advisor has deemed certain of these non-rated sec-
urities to be of investment grade quality. As of January 31, 2010 and
July 31, 2009, the market value of these securities was $2,515,180,
representing 3% and $1,515,561, representing 2%, respectively, of
the Fund's long-term investments.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

5


Fund Summary as of January 31, 2010

BlackRock MuniYield California Fund, Inc.

Investment Objective

BlackRock MuniYield California Fund, Inc. (MYC) (the “Fund”) seeks to provide shareholders with as high a level of current income exempt from federal
and California income taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-
term municipal obligations, the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal and California income taxes.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended January 31, 2010, the Fund returned 5.73% based on market price and 8.98% based on NAV. For the same period, the closed-
end Lipper California Municipal Debt Funds category posted an average return of 9.46% based on market price and 11.46% on a NAV basis. All returns
reflect reinvestment of dividends. The Fund’s discount to NAV, which widened during the period, accounts for the difference between performance based on
price and performance based on NAV. The Fund maintains a relatively generous degree of income accrual, which was a positive contributor. In addition, the
tightening of credit quality spreads benefited the lower-rated sectors of the portfolio. Corporate-backed and health municipals were notable contributors. A
fully-invested posture was additive, yet a more neutral duration stance caused the Fund to underperform its Lipper group average as rates declined in the
second half of 2009. The decline in rates was partly due to supply pressure being relieved by the Build America Bond Program, which effectively shifted
supply to the taxable market. The Fund’s neutral duration position is a result of holding higher-quality securities, which tend to have shorter duration charac-
teristics. The Fund’s short-call, high-coupon holdings also were a detractor. While these bonds possess good defensive characteristics, they hindered total
return as interest rates fell dramatically.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information     
  Symbol on NYSE  MYC 
  Initial Offering Date  February 28, 1992 
  Yield on Closing Market Price as of January 31, 2010 ($12.75)1  6.35% 
  Tax Equivalent Yield2  9.77% 
  Current Monthly Distribution per Common Share3  $0.0675 
  Current Annualized Distribution per Common Share3  $0.8100 
  Leverage as of January 31, 20104  37% 

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 Tax equivalent yield assumes the maximum federal tax rate of 35%.
3 The Monthly Distribution per Share, declared on March 1, 2010, was increased to $0.0700. The Yield on Closing Market Price, Current Monthly
Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution
rate is not constant and is subject to further change in the future.
4 Represents Preferred Shares and TOBs as a percentage of total managed assets, which is the total assets of the Fund, including any assets attributa-
ble to Preferred Shares and TOBs, minus the sum of accrued liabilities. For a discussion of leveraging techniques utilized by the Fund, please see The
Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  1/31/10  7/31/09  Change  High  Low 
Market Price  $12.75  $12.44  2.49%  $14.00  $12.32 
Net Asset Value  $14.23  $13.47  5.64%  $15.11  $13.45 

The following charts show the sector and credit quality allocations of the Fund’s long-term investments:

     Sector Allocations     
  1/31/10  7/31/09 
County/City/Special District/     
   School District  35%  35% 
Utilities  26  28 
Education  13  13 
Health  11  9 
Corporate  6  1 
State  5  7 
Transportation  3  6 
Housing  1  1 

     Credit Quality Allocations5     
  1/31/10  7/31/09 
AAA/Aaa   32%  34% 
AA/Aa  40  30 
A  22  34 
BBB/Baa  5  1 
Not Rated6  1  1 

5 Using the higher of S&P’s or Moody’s ratings.
6 The investment advisor has deemed certain of these non-rated
securities to be of investment grade quality. As of January 31,
2010 and July 31, 2009, the market value of these securities
was $2,520,958, representing 1% and $2,589,445, representing
1%, respectively, of the Fund’s long-term investments.

6 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Fund Summary as of January 31, 2010

BlackRock MuniYield Investment Fund

Investment Objective

BlackRock MuniYield Investment Fund (MYF) (the “Fund”) seeks to provide shareholders with as high a level of current income exempt from federal income
taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-term municipal obligations,
the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal income taxes. The Fund also seeks to provide shareholders with the
opportunity to own shares the value of which is exempt from Florida intangible personal property taxes. The Fund may invest in municipal obligations regardless
of geographic location.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended January 31, 2010, the Fund returned 13.27% based on market price and 9.52% based on NAV. For the same period, the closed-
end Lipper General Municipal Debt Funds (Leveraged) category posted an average return of 13.14% based on market price and 12.60% on a NAV basis.
All returns reflect reinvestment of dividends. The Fund’s discount to NAV, which narrowed during the period, accounts for the difference between performance
based on price and performance based on NAV. The Fund held a higher concentration in health and housing bonds with maturities of 20 years and longer,
which benefited performance as the municipal yield curve flattened during the last six months. Meanwhile, we continued to restructure the Fund’s holdings
in line with its transition from a Florida fund to a national portfolio. The process is not yet complete, however, and the greater exposure to Florida holdings—
which underperformed the national market—detracted from recent performance.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information     
  Symbol on NYSE  MYF 
  Initial Offering Date  February 28, 1992 
  Yield on Closing Market Price as of January 31, 2010 ($12.88)1  6.10% 
  Tax Equivalent Yield2  9.38% 
  Current Monthly Distribution per Common Share3  $0.0655 
  Current Annualized Distribution per Common Share3  $0.7860 
  Leverage as of January 31, 20104  38% 

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 Tax equivalent yield assumes the maximum federal tax rate of 35%.
3 The Monthly Distribution per Share, declared on March 1, 2010, was increased to $0.0705. The Yield on Closing Market Price, Current Monthly
Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution
rate is not constant and is subject to further change in the future.
4 Represents Preferred Shares and TOBs as a percentage of total managed assets, which is the total assets of the Fund, including any assets attributa-
ble to Preferred Shares and TOBs, minus the sum of accrued liabilities. For a discussion of leveraging techniques utilized by the Fund, please see The
Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  1/31/10  7/31/09  Change  High  Low 
Market Price  $12.88  $11.72  9.90%  $13.37  $11.64 
Net Asset Value  $13.76  $12.95  6.25%  $14.41  $12.93 

The following charts show the sector and credit quality allocations of the Fund’s long-term investments:

     Sector Allocations     
  1/31/10  7/31/09 
County/City/Special District/     
   School District  24%  29% 
Transportation  18  16 
Utilities  18  19 
Health  16  17 
State  8  9 
Education  7  5 
Housing  5  5 
Corporate  4   

     Credit Quality Allocations5     
  1/31/10  7/31/09 
AAA/Aaa   18%  23% 
AA/Aa  47  39 
A  29  34 
BBB/Baa  4   
Not Rated6  2  4 

5 Using the higher of S&P’s or Moody’s ratings.
6 The investment advisor has deemed certain of these non-rated sec-
urities to be of investment grade quality. As of January 31, 2010 and
July 31, 2009, the market value of these securities was $5,651,318,
representing 2% and $4,309,488, representing 2%, respectively, of
the Fund's long-term investments.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

7


Fund Summary as of January 31, 2010

BlackRock MuniYield New Jersey Fund, Inc.

Investment Objective

BlackRock MuniYield New Jersey Fund, Inc. (MYJ) (the “Fund”) seeks to provide shareholders with as high a level of current income exempt from federal
and New Jersey income taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-
term, investment grade municipal obligations, the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal income tax and New
Jersey personal income taxes.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended January 31, 2010, the Fund returned 7.44% based on market price and 8.19% based on NAV. For the same period, the closed-
end Lipper New Jersey Municipal Debt Funds category posted an average return of 13.70% based on market price and 10.42% on a NAV basis. All returns
reflect reinvestment of dividends. The Fund’s discount to NAV, which widened during the period, accounts for the difference between performance based on
price and performance based on NAV. The Fund held overweight positions in health and housing bonds with maturities of 20 years and longer, which bene-
fited performance as the municipal yield curve flattened during the last six months. The Fund’s more concentrated position in Puerto Rico securities, and its
slight overweight in zero-coupon bonds, detracted from performance during the period.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information             
  Symbol on NYSE          MYJ 
  Initial Offering Date          May 1, 1992 
  Yield on Closing Market Price as of January 31, 2010 ($14.07)1          6.01% 
  Tax Equivalent Yield2          9.25% 
  Current Monthly Distribution per Common Share3          $0.0705 
  Current Annualized Distribution per Common Share3          $0.8460 
  Leverage as of January 31, 20104          34% 
     1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.   
         Past performance does not guarantee future results.           
     2 Tax equivalent yield assumes the maximum federal tax rate of 35%.           
     3 The distribution is not constant and is subject to change.           
     4 Represents Preferred Shares and TOBs as a percentage of total managed assets, which is the total assets of the Fund, including any assets attributa- 
         ble to Preferred Shares and TOBs, minus the sum of accrued liabilities. For a discussion of leveraging techniques utilized by the Fund, please see The 
         Benefits and Risks of Leveraging on page 9.           
  The table below summarizes the changes in the Fund’s market price and NAV per share:       
    1/31/10  7/31/09  Change  High  Low 
  Market Price  $14.07  $13.49  4.30%  $14.76  $13.49 
  Net Asset Value  $14.84  $14.13  5.02%  $15.47  $14.11 

The following charts show the sector and credit quality allocations of the Fund’s long-term investments:

     Sector Allocations     
  1/31/10  7/31/09 
State       28%     28% 
County/City/Special District/     
   School District  14  16 
Health  14  13 
Transportation  12  12 
Housing  12  10 
Education  11  11 
Utilities  6  6 
Corporate  2  3 
Tobacco  1  1 

     Credit Quality Allocations5     
  1/31/10  7/31/09 
AAA/Aaa  26%     27% 
AA/Aa  28  27 
A  32  31 
BBB/Baa  8  11 
BB/Ba  2   
Not Rated6  4  4 

5 Using the higher of S&P’s or Moody’s ratings.
6 The investment advisor has deemed certain of these non-rated
securities to be of investment grade quality. As of January 31,
2010 and July 31, 2009, the market value of these securities was
$12,610,399, representing 4% and $9,156,088, representing
3%, respectively, of the Fund's long-term investments.

8 SEMI-ANNUAL REPORT

JANUARY 31, 2010


The Benefits and Risks of Leveraging

The Funds may utilize leverage to seek to enhance the yield and NAV of
their Common Shares. However, these objectives cannot be achieved in all
interest rate environments.

To leverage, the Funds issue Preferred Shares, which pay dividends at pre-
vailing short-term interest rates, and invest the proceeds in long-term
municipal bonds. In general, the concept of leveraging is based on the
premise that the cost of assets to be obtained from leverage will be based
on short-term interest rates, which normally will be lower than the income
earned by each Fund on its longer-term portfolio investments. To the extent
that the total assets of each Fund (including the assets obtained from
leverage) are invested in higher-yielding portfolio investments, each Fund’s
Common Shareholders will benefit from the incremental net income.

To illustrate these concepts, assume a Fund’s Common Shares capitalization
is $100 million and it issues Preferred Shares for an additional $50 million,
creating a total value of $150 million available for investment in long-term
municipal bonds. If prevailing short-term interest rates are 3% and long-
term interest rates are 6%, the yield curve has a strongly positive slope. In
this case, the Fund pays dividends on the $50 million of Preferred Shares
based on the lower short-term interest rates. At the same time, the securi-
ties purchased by the Fund with assets received from the Preferred Shares
issuance earn the income based on long-term interest rates. In this case,
the dividends paid to Preferred Shareholders are significantly lower than
the income earned on the Fund’s long-term investments, and therefore the
Common Shareholders are the beneficiaries of the incremental net income.

If short-term interest rates rise, narrowing the differential between short-term
and long-term interest rates, the incremental net income pickup on the
Common Shares will be reduced or eliminated completely. Furthermore, if
prevailing short-term interest rates rise above long-term interest rates of 6%,
the yield curve has a negative slope. In this case, the Fund pays dividends
on the higher short-term interest rates whereas the Fund’s total portfolio
earns income based on lower long-term interest rates.

Furthermore, the value of the Fund’s portfolio investments generally varies
inversely with the direction of long-term interest rates, although other factors
can influence the value of portfolio investments. In contrast, the redemp-
tion value of the Fund’s Preferred Shares does not fluctuate in relation to
interest rates. As a result, changes in interest rates can influence the Fund’s
NAV positively or negatively in addition to the impact on Fund performance
from leverage from Preferred Shares discussed above.

The Funds may also leverage their assets through the use of tender
option bond (“TOB”) programs, as described in Note 1 of the Notes to
Financial Statements. TOB investments generally will provide the Funds

with economic benefits in periods of declining short-term interest rates, but
expose the Funds to risks during periods of rising short-term interest rates
similar to those associated with Preferred Shares issued by the Funds, as
described above. Additionally, fluctuations in the market value of municipal
bonds deposited into the TOB trust may adversely affect each Fund’s NAV
per share.

The use of leverage may enhance opportunities for increased returns to the
Funds and Common Shareholders, but as described above, it also creates
risks as short- or long-term interest rates fluctuate. Leverage also will gen-
erally cause greater changes in the Funds’ NAV, market price and dividend
rate than a comparable portfolio without leverage. If the income derived
from securities purchased with assets received from leverage exceeds the
cost of leverage, the Funds’ net income will be greater than if leverage had
not been used. Conversely, if the income from the securities purchased is
not sufficient to cover the cost of leverage, the Funds’ net income will be
less than if leverage had not been used, and therefore the amount avail-
able for distribution to Common Shareholders will be reduced. Each Fund
may be required to sell portfolio securities at inopportune times or at dis-
tressed values in order to comply with regulatory requirements applicable
to the use of leverage or as required by the terms of leverage instruments,
which may cause a Fund to incur losses. The use of leverage may limit each
Fund’s ability to invest in certain types of securities or use certain types
of hedging strategies, such as in the case of certain restrictions imposed
by ratings agencies that rate preferred shares issued by the Funds. Each
Fund will incur expenses in connection with the use of leverage, all of
which are borne by Common Shareholders and may reduce income to
the Common Shares.

Under the Investment Company Act of 1940, the Funds are permitted to
issue Preferred Shares in an amount of up to 50% of its total managed
assets at the time of issuance. Under normal circumstances, each Fund
anticipates that the total economic leverage from Preferred Shares and/or
TOBs will not exceed 50% of its total managed assets at the time such
leverage is incurred. As of January 31, 2010, the Funds had economic
leverage from Preferred Shares and/or TOBs as a percentage of their total
managed assets as follows:

  Percent of 
  Leverage 
MNE  34% 
MZA  40% 
MYC  37% 
MYF  38% 
MYJ  34% 

Derivative Financial Instruments

The Funds may invest in various derivative instruments, including financial
futures contracts, as specified in Note 2 of the Notes to Financial
Statements, which constitute forms of economic leverage. Such instruments
are used to obtain exposure to a market without owning or taking physical
custody of securities or to hedge market and/or interest rate risks. Such
derivative instruments involve risks, including the imperfect correlation
between the value of a derivative instrument and the underlying asset,
possible default of the counterparty to the transaction or illiquidity of the
derivative instrument. Each Fund’s ability to successfully use a derivative

instrument depends on the investment advisor’s ability to accurately pre-
dict pertinent market movements, which cannot be assured. The use of
derivative instruments may result in losses greater than if they had not
been used, may require a Fund to sell or purchase portfolio securities at
inopportune times or for distressed values, may limit the amount of appre-
ciation a Fund can realize on an investment or may cause a Fund to hold a
security that it might otherwise sell. The Funds’ investments in these instru-
ments are discussed in detail in the Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

9


Schedule of Investments January 31, 2010 (Unaudited)

BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE)
(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)           Value 
     New York — 121.7%       
Corporate — 13.4%       
Jefferson County Industrial Development Agency       
 New York, Refunding RB, Solid Waste, Series A, AMT,       
 5.20%, 12/01/20  $ 500  $ 485,850 
New York City Industrial Development Agency, RB, AMT:     
     1990 American Airlines Inc. Project, 5.40%, 7/01/20  1,500  1,107,435 
     British Airways Plc Project, 7.63%, 12/01/32    1,000  913,200 
     Continental Airlines Inc. Project, 8.38%, 11/01/16  1,000  751,730 
New York City Industrial Development Agency, Refunding     
 RB, Terminal One Group Association Project, AMT:       
     5.50%, 1/01/18    1,000  1,026,340 
     5.50%, 1/01/24    1,000  1,004,460 
New York State Energy Research & Development       
 Authority, RB, Lilco Project, Series A (NPFGC),       
 5.15%, 3/01/16    1,000  1,003,670 
New York State Energy Research & Development Authority,     
 Refunding RB:       
     Brooklyn Union Gas/Keyspan, Series A, AMT (FGIC),     
     4.70%, 2/01/24    500  492,440 
     Rochester Gas & Electric Corp., Series C (NPFGC),     
     5.00%, 8/01/32    1,000  1,030,310 
      7,815,435 
County/City/Special District/School District — 18.1%     
City of New York New York, GO:       
     Series J, 5.50%, 6/01/21 (a)    500  574,945 
     Series J (NPFGC), 5.25%, 5/15/18    1,500  1,634,250 
     Sub-Series F-1 (Syncora), 5.00%, 9/01/22    1,000  1,057,480 
     Sub-Series I-1, 5.50%, 4/01/21    1,500  1,694,595 
     Sub-Series I-1, 5.13%, 4/01/25    750  806,452 
New York City Industrial Development Agency, RB,       
 Queens Baseball Stadium, PILOT (AMBAC),       
 5.00%, 1/01/31    1,500  1,423,470 
New York City Industrial Development Agency,       
 Refunding RB, New York Stock Exchange Project,       
 Series A, 4.25%, 5/01/24    500  497,330 
New York City Transitional Finance Authority, RB:       
     Fiscal 2007, Series S-1 (NPFGC), 5.00%, 7/15/24  500  528,215 
     Fiscal 2009, Series S-3, 5.00%, 1/15/23    575  613,876 
New York State Dormitory Authority, Refunding RB,       
 Consolidated Service Contract, Series A,       
 4.00%, 7/01/25    750  723,983 
United Nations Development Corp. New York,       
 Refunding RB, Series A, 4.25%, 7/01/24    1,000  999,970 
      10,554,566 
Education — 12.4%       
Dutchess County Industrial Development Agency       
 New York, Refunding RB, Bard College Civic Facility,       
 Series A-1, 5.00%, 8/01/22    750  756,533 
New York City Industrial Development Agency, RB,       
 Lycee Francais de New York Project, Series A (ACA),       
 5.50%, 6/01/15    500  531,395 

     Par   
Municipal Bonds    (000)  Value 
     New York (continued)       
Education (concluded)       
New York City Industrial Development Agency,       
 Refunding RB, Polytechnic University Project (ACA),       
 4.70%, 11/01/22  $ 1,000  $ 893,400 
New York State Dormitory Authority, Mount Sinai       
 School of Medicine, RB:       
     5.50%, 7/01/25    1,000  1,042,510 
     Series A (NPFGC), 5.15%, 7/01/24    250  254,445 
Schenectady County Industrial Development Agency,       
 Refunding RB, Union College Project, 5.00%, 7/01/26  1,000  1,049,180 
St. Lawrence County Industrial Development Agency       
 New York, RB, St. Lawrence University, Series A,       
 5.00%, 10/01/16    1,500  1,670,535 
Trust for Cultural Resources, RB:       
     Carnegie Hall, Series A, 5.00%, 12/01/29    750  775,882 
     Museum of American Folk Art (ACA),       
     6.13%, 7/01/30    500  275,015 
      7,248,895 
Health — 27.3%       
Dutchess County Industrial Development Agency       
 New York, RB, St. Francis Hospital, Series B,       
 7.25%, 3/01/19    355  357,304 
Erie County Industrial Development Agency, RB,       
 Episcopal Church Home, Series A, 5.88%, 2/01/18    1,690  1,690,608 
Genesee County Industrial Development Agency       
 New York, Refunding RB, United Memorial Medical       
 Center Project, 4.75%, 12/01/14    335  333,978 
New York City Industrial Development Agency, RB,       
 PSCH Inc. Project, 6.20%, 7/01/20    1,415  1,311,422 
New York State Dormitory Authority, RB:       
     New York State Association for Retarded       
     Children, Inc., Series A, 5.30%, 7/01/23    450  470,174 
     North Shore-Long Island Jewish Health System,       
     5.00%, 5/01/13    1,500  1,643,640 
     North Shore-Long Island Jewish Health System,       
     Series A, 5.25%, 5/01/25    780  787,714 
     NYU Hospital Center, Series B, 5.25%, 7/01/24    480  470,942 
     Winthrop S. Nassau University, 5.50%, 7/01/11    1,735  1,789,999 
New York State Dormitory Authority, Refunding, RB:       
     Lenox Hill Hospital Obligation Group,       
     5.75%, 7/01/17    1,305  1,287,148 
     North Shore-Long Island Jewish Health System,       
     Series E, 5.00%, 5/01/22    650  664,944 
     NYU Hospital Center, Series A, 5.00%, 7/01/16    1,130  1,173,946 
Saratoga County Industrial Development Agency       
 New York, Refunding RB, The Saratoga Hospital Project,     
 Series A (Radian):       
     4.38%, 12/01/13    365  375,651 
     4.50%, 12/01/14    380  389,686 
Suffolk County Industrial Development Agency       
 New York, Refunding RB, Jeffersons Ferry Project,       
 4.63%, 11/01/16    800  785,936 

     Portfolio Abbreviations         
To simplify the listings of portfolio holdings in the  CAB  Capital Appreciation Bonds  HRB  Housing Revenue Bonds 
Schedules of Investments, the names and descriptions of  CIFG  CDC IXIS Financial Guaranty  IDA  Industrial Development Authority 
many of the securities have been abbreviated according  COP  Certificates of Participation  IDRB  Industrial Development Revenue Bonds 
to the following list:  EDA  Economic Development Authority  LRB  Lease Revenue Bonds 
    ERB  Education Revenue Bonds  NPFGC  National Public Finance Guarantee Corp. 
ACA  American Capital Access Corp.  FGIC  Financial Guaranty Insurance Co.  PILOT  Payment in Lieu of Taxes 
AGC  Assured Guaranty Corp.  FSA  Financial Security Assurance Inc.  RB  Revenue Bonds 
AGM  Assured Guaranty Municipal Corp.  GNMA  Government National Mortgage Association  S/F  Single-Family 
AMBAC  American Municipal Bond Assurance Corp.  GO  General Obligation Bonds  SONYMA  State of New York Mortgage Agency 
AMT  Alternative Minimum Tax (subject to)  HFA  Housing Finance Agency     
See Notes to Financial Statements.         

10 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments (continued)

BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE)

(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)  Value 
     New York (concluded)       
Health (concluded)       
Tompkins County Industrial Development Agency       
 New York, Refunding RB, Continuing Care Retirement       
 Community, Kendal at Ithaca Project, Series A-2:       
     5.75%, 7/01/18  $ 250  $ 250,145 
     6.00%, 7/01/24    1,000  1,000,260 
Westchester County Industrial Development Agency       
 New York, RB, Special Needs Facilities Pooled Program,     
 Series D-1, 6.80%, 7/01/19    515  502,413 
Yonkers Industrial Development Agency New York, RB,       
 Sacred Heart Associations Project, Series A, AMT       
 (SONYMA), 4.80%, 10/01/26    750  697,770 
      15,983,680 
Housing — 13.0%       
New York City Housing Development Corp., RB, The       
 Animal Medical Center, Series A, 5.50%, 12/01/33    1,615  1,617,745 
New York Mortgage Agency, Refunding RB, AMT:       
     Homeowner Mortgage, Series 130,       
     4.75%, 10/01/30    2,500  2,381,175 
     Series 133, 4.95%, 10/01/21    1,000  1,013,590 
     Series 143, 4.85%, 10/01/27    500  474,905 
New York State Urban Development Corp., RB,       
 Subordinate Lien, Corporate Purpose, Series A,       
 5.13%, 7/01/19    2,000  2,130,760 
      7,618,175 
State — 15.1%       
New York Municipal Bond Bank Agency, RB, Series C,       
 5.25%, 12/01/18    2,000  2,132,300 
New York State Dormitory Authority, ERB, Series F,       
 5.00%, 3/15/30    1,290  1,337,098 
New York State Dormitory Authority, LRB, Municipal       
 Health Facilities, Sub-Series 2-4, 5.00%, 1/15/27    600  622,722 
New York State Dormitory Authority, Refunding RB,       
 Department of Health, Series A (CIFG),       
 5.00%, 7/01/25    1,500  1,536,405 
New York State Thruway Authority, Refunding RB,       
 Series A-1, 5.00%, 4/01/22    1,000  1,099,300 
New York State Urban Development Corp., RB, State       
 Personal Income Tax, State Facilities, Series A-1       
 (NPFGC), 5.00%, 3/15/24    485  510,647 
New York State Urban Development Corp., Refunding RB,     
 Service Contract, Series B, 5.00%, 1/01/21    1,500  1,617,435 
      8,855,907 
Tobacco — 1.8%       
Tobacco Settlement Financing Corp. New York, RB,       
 Asset-Backed, Series B-1C, 5.50%, 6/01/22    1,000  1,059,410 
Transportation — 11.9%       
Metropolitan Transportation Authority, RB (NPFGC):       
     Series A, 5.00%, 11/15/24    2,000  2,075,640 
     Series B, 5.25%, 11/15/19    860  965,703 
Metropolitan Transportation Authority, Refunding RB:       
     Series A (NPFGC), 5.00%, 11/15/25    3,000  3,090,420 
     Series B, 5.25%, 11/15/25    750  822,757 
      6,954,520 
Utilities — 8.7%       
Long Island Power Authority, Refunding RB:       
     General, Series D (NPFGC), 5.00%, 9/01/25    4,000  4,140,440 
     Series A, 5.50%, 4/01/24    875  954,529 
      5,094,969 
Total Municipal Bonds in New York      71,185,557 

  Par   
Municipal Bonds  (000)  Value 
     Guam — 4.3%     
County/City/Special District/School District — 0.6%     
Territory of Guam, RB, Section 30, Series A,     
 5.38%, 12/01/24  $ 325  $ 325,345 
State — 0.3%     
Territory of Guam, GO, Series A, 6.00%, 11/15/19  185  187,882 
Transportation — 1.7%     
Guam International Airport Authority, Refunding RB,     
 General, Series C, AMT (NPFGC), 5.25%, 10/01/22  1,000  1,000,400 
Utilities — 1.7%     
Guam Government Waterworks Authority, Refunding RB,     
 Water, 6.00%, 7/01/25  1,000  1,001,310 
Total Municipal Bonds in Guam    2,514,937 
     Puerto Rico — 17.9%     
Education — 0.8%     
Puerto Rico Industrial Tourist Educational Medical     
 & Environmental Control Facilities Financing Authority,     
 RB, University Plaza Project, Series A (NPFGC),     
 5.00%, 7/01/33  500  463,555 
Housing — 3.4%     
Puerto Rico Housing Finance Authority, Refunding     
 RB, Subordinate, Capital Fund Modernization,     
 5.13%, 12/01/27  2,000  2,001,980 
State — 4.5%     
Commonwealth of Puerto Rico, GO, Public Improvement,     
 Series A, 5.25%, 7/01/30 (a)  615  727,570 
Commonwealth of Puerto Rico, GO, Refunding, Public     
 Improvement, Series A-4 (AGM), 5.25%, 7/01/30  350  360,251 
Puerto Rico Municipal Finance Agency, GO, Series A,     
 5.25%, 8/01/25  1,000  1,000,000 
Puerto Rico Public Buildings Authority, Refunding     
 RB, Government Facilities, Series M-3 (NPFGC),     
 6.00%, 7/01/28  500  515,965 
    2,603,786 
Transportation — 9.2%     
Puerto Rico Highway & Transportation Authority, RB:     
     Series Y (AGM), 6.25%, 7/01/21  3,000  3,330,150 
     Subordinate (FGIC), 5.75%, 7/01/21  2,000  2,041,520 
    5,371,670 
Total Municipal Bonds in Puerto Rico    10,440,991 
     U.S. Virgin Islands — 3.4%     
Corporate — 1.7%     
United States Virgin Islands, Refunding RB,     
 Senior Secured, Hovensa Coker Project, AMT,     
 6.50%, 7/01/21  500  505,646 
Virgin Islands Public Finance Authority, RB, Senior     
 Secured, Hovensa Refinery, AMT, 4.70%, 7/01/22  500  446,490 
    952,136 
State — 1.7%     
Virgin Islands Public Finance Authority, RB,     
 Senior Lien, Matching Fund Loan Note, Series A,     
 5.25%, 10/01/24  1,000  1,005,680 
Total Municipal Bonds in the U.S. Virgin Islands    1,957,816 
Total Municipal Bonds — 147.3%    86,099,301 

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

11


Schedule of Investments (concluded)

BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE)

(Percentages shown are based on Net Assets)

Municipal Bonds Transferred to  Par   
Tender Option Bond Trusts (b)  (000)           Value 
New York — 1.4%     
County/City/Special District/School District — 1.4%     
City of New York, New York, GO, Sub-Series B-1,     
 5.25%, 9/01/22  $ 750  $ 823,672 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts — 1.4%    823,672 
Total Long-Term Investments     
(Cost — $85,981,425) — 148.7%    86,922,973 
Short-Term Securities  Shares   
CMA New York Municipal Money Fund, 0.00% (c)(d)  641,113  641,113 
Total Short-Term Securities     
(Cost — $641,113) — 1.1%    641,113 
Total Investments (Cost — $86,622,538*) — 149.8%    87,564,086 
Other Assets Less Liabilities — 1.6%    917,170 
Liability for Trust Certificates, Including Interest     
   Expense and Fees Payable — (0.7)%    (376,191) 
Preferred Shares, at Redemption Value — (50.7)%    (29,632,983) 
Net Assets Applicable to Common Shares — 100.0%    $ 58,472,082 

* The cost and unrealized appreciation (depreciation) of investments as of
January 31, 2010, as computed for federal income tax purposes, were as follows:

Aggregate cost  $ 86,126,913 
Gross unrealized appreciation  $ 2,364,460 
Gross unrealized depreciation  (1,302,287) 
Net unrealized appreciation  $ 1,062,173 

(a) US government securities, held in escrow, are used to pay interest on this security
as well as to retire the bond in full at the date indicated, typically at a premium
to par.
(b) Securities represent bonds transferred to a tender option bond trust in exchange for
which the Fund acquired residual interest certificates. These securities serve as col-
lateral in a financing transaction. See Note 1 of the Notes to Financial Statements
for details of municipal bonds transferred to tender option bond trusts.
(c) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Net   
     Affiliate  Activity  Income 
     CMA New York Municipal Money Fund  $(1,096,728)  $119 
(d) Represents the current yield as of report date.     

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an indi-
cation of the risk associated with investing in those securities. For information about
the Fund’s policy regarding valuation of investments and other significant accounting
policies, please refer to Note 1 of the Notes to Financial Statements.
The following table summarizes the inputs used as of January 31, 2010 in deter-
mining the fair valuation of the Fund’s investments:

Valuation  Investments in 
Inputs  Securities 
  Assets 
Level 1 — Short-Term Securities  $ 641,113 
Level 2 — Long-Term Investments1  86,922,973 
Level 3   
Total  $ 87,564,086 

1 See above Schedule of Investments for values in each sector.

See Notes to Financial Statements.

12 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments January 31, 2010 (Unaudited)

BlackRock MuniYield Arizona Fund, Inc. (MZA)
(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)  Value 
     Arizona — 133.9%       
County/City/Special District/School District — 44.0%     
City of Tucson Arizona, COP (AGC), 5.00%, 7/01/29  $ 1,000  $ 1,023,350 
County of Pinal Arizona, COP:       
     5.00%, 12/01/26    1,250  1,240,088 
     5.00%, 12/01/29    1,250  1,226,788 
Downtown Phoenix Hotel Corp., RB:       
     Senior Series A (FGIC), 5.00%, 7/01/36    915  753,484 
     Sub-Series B (NPFGC), 5.00%, 7/01/36    415  395,690 
Gila County Unified School District No. 10-Payson       
 Arizona, GO, School Improvement Project of 2006,       
 Series A (AMBAC), 5.25%, 7/01/27 (a)    1,000  1,024,640 
Gilbert Public Facilities Municipal Property Corp. Arizona,     
 RB, 5.50%, 7/01/27    2,000  2,155,320 
Gladden Farms Community Facilities District, GO,       
 5.50%, 7/15/31    750  578,033 
Greater Arizona Development Authority, RB, Santa Cruz     
 County Jail, Series 2, 5.25%, 8/01/31    1,000  1,036,070 
Maricopa County Community College District, Arizona,     
 GO, Series C, 3.00%, 7/01/22    1,000  938,870 
Maricopa County Elementary School District No. 3-       
 Tempe Elementary, Arizona, GO, Refunding (NPFGC),     
 7.50%, 7/01/10    290  298,021 
Maricopa County Unified School District No. 11-Peoria     
 Arizona, GO, School Improvement, 2nd Series (NPFGC),     
 5.00%, 7/01/25    430  454,411 
Maricopa County Unified School District No. 89-Dysart     
 Arizona, GO, School Improvement Project of 2006,       
 Series C, 6.00%, 7/01/28    1,000  1,109,320 
Mohave County Unified School District No. 20       
 Kingman, GO, School Improvement Project of 2006,     
 Series C (AGC):       
     5.50%, 7/01/20    1,150  1,308,953 
     5.00%, 7/01/26    1,000  1,063,290 
Phoenix Civic Improvement Corp., RB, Subordinate,       
 Civic Plaza Expansion Project, Series A (NPFGC),       
 5.00%, 7/01/35    3,325  3,335,839 
Queen Creek Improvement District No. 1, Special       
 Assessment Bonds, 5.00%, 1/01/32    2,000  1,771,120 
Scottsdale Municipal Property Corp. Arizona, RB,       
 Water & Sewer Development Project, Series A,       
 5.00%, 7/01/24    1,500  1,637,700 
Scottsdale Municipal Property Corp. Arizona,       
 Refunding RB, 5.00%, 7/01/26    1,570  1,767,741 
Vistancia Community Facilities District Arizona, GO:       
     6.75%, 7/15/22    1,275  1,299,161 
     5.75%, 7/15/24    750  730,605 
Yuma County Library District, GO (Syncora),       
 5.00%, 7/01/26    1,465  1,515,411 
      26,663,905 
Education — 19.8%       
Arizona State University, RB, Series 2008-C:       
     6.00%, 7/01/25    970  1,113,133 
     6.00%, 7/01/26    350  399,623 
     6.00%, 7/01/27    425  485,257 
     6.00%, 7/01/28    300  341,154 
Arizona Student Loan Acquisition Authority, Refunding RB,     
 Junior Lien, Sub-Series B-1, AMT, 6.15%, 5/01/29    3,285  3,295,446 
Maricopa County IDA Arizona, RB, Arizona Charter       
 Schools Project, Series A, 6.63%, 7/01/20    900  689,616 
Pima County IDA, RB, American Charter       
 Schools Foundation, Series A, 5.63%, 7/01/38    500  380,500 

  Par   
Municipal Bonds  (000)  Value 
     Arizona (continued)     
Education (concluded)     
Pima County IDA, RB, Arizona Charter Schools Project,     
 Series C:     
     6.70%, 7/01/21  $ 725  $ 696,710 
     6.75%, 7/01/31  985  904,319 
Pima County IDA, Refunding RB:     
     Arizona Charter Schools Project, Series O,     
     5.00%, 7/01/26  1,000  778,730 
     Charter Schools II, Series A, 6.75%, 7/01/21  575  554,823 
University of Arizona, COP, Refunding, University of     
 Arizona Projects, Series A (AMBAC), 5.13%, 6/01/29  905  916,340 
University of Arizona, COP, University of Arizona Projects,     
 Series B (AMBAC), 5.00%, 6/01/28  1,400  1,411,032 
    11,966,683 
Health — 19.2%     
Arizona Health Facilities Authority, RB, Catholic     
 Healthcare West, Series A, 6.63%, 7/01/20  1,435  1,483,130 
Arizona Health Facilities Authority, Refunding RB,     
 Banner Health, Series D:     
     6.00%, 1/01/30  1,500  1,537,785 
     5.50%, 1/01/38  1,300  1,315,743 
Maricopa County IDA Arizona, Refunding RB:     
     Catholic Healthcare West, Series A,     
     5.50%, 7/01/26  1,850  1,874,513 
     Samaritan Health Services, Series A (NPFGC),     
     7.00%, 12/01/16 (b)  1,000  1,224,690 
Scottsdale IDA Arizona, Refunding RB, Scottsdale     
 Healthcare, Series A, 5.25%, 9/01/30  900  845,019 
Tucson IDA, RB, Christian Care Project, Series A     
 (Radian), 6.13%, 7/01/24 (c)  1,000  1,032,050 
University Medical Center Corp. Arizona, RB,     
 6.50%, 7/01/39  500  528,820 
Yavapai County IDA Arizona, RB, Yavapai Regional     
 Medical Center, Series A, 6.00%, 8/01/33  1,800  1,803,924 
    11,645,674 
Housing — 10.6%     
Maricopa County & Phoenix Industrial Development     
 Authorities, Refunding RB, AMT (GNMA):     
     S/F, Series A-1, 5.75%, 5/01/40  965  1,010,114 
     S/F, Series A-2, 5.80%, 7/01/40  705  718,606 
Maricopa County IDA Arizona, RB, Series 3-B, AMT     
 (GNMA), 5.25%, 8/01/38  1,356  1,384,710 
Phoenix & Pima County IDA, RB, Series 1A, AMT     
 (GNMA), 5.65%, 7/01/39  580  604,772 
Phoenix & Pima County IDA, Refunding RB,     
 Series 2007-1, AMT (GNMA), 5.25%, 8/01/38  1,326  1,377,601 
Phoenix IDA Arizona, Refunding RB, Series 2007-2,     
 AMT (GNMA), 5.50%, 8/01/38  1,280  1,340,112 
    6,435,915 
State — 17.0%     
Arizona School Facilities Board, COP:     
     5.13%, 9/01/21  1,000  1,075,790 
     5.75%, 9/01/22  2,000  2,221,960 
Arizona Sports & Tourism Authority, RB, Baseball     
 Training Facilities Project, 5.00%, 7/01/16  1,000  1,017,880 
Arizona State Transportation Board, RB, Series B,     
 5.00%, 7/01/30  4,000  4,268,760 
Greater Arizona Development Authority, RB, Series B     
 (NPFGC), 5.00%, 8/01/30  1,700  1,733,558 
    10,317,948 

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

13


Schedule of Investments (continued)

BlackRock MuniYield Arizona Fund, Inc. (MZA)
(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)           Value 
     Arizona (concluded)       
Transportation — 4.4%       
Phoenix Civic Improvement Corp., RB, Senior Lien:       
     Series A, 5.00%, 7/01/33  $ 1,000  $ 1,008,170 
     Series B, AMT (NPFGC), 5.75%, 7/01/17    1,000  1,041,630 
     Series B, AMT (NPFGC), 5.25%, 7/01/32    600  592,188 
      2,641,988 
Utilities — 18.9%       
City of Mesa Arizona, RB (NPFGC), 5.00%, 7/01/23    1,500  1,647,195 
Gilbert Water Resource Municipal Property Corp., RB,       
 Subordinate Lien (NPFGC), 5.00%, 10/01/29    900  925,929 
Phoenix Civic Improvement Corp., RB:       
     Junior Lien (NPFGC), 5.50%, 7/01/20    2,500  2,708,000 
     Senior Lien, 5.50%, 7/01/22    2,000  2,263,820 
Pinal County IDA Arizona, RB, San Manuel Facility       
 Project, AMT, 6.25%, 6/01/26    500  423,735 
Salt River Project Agricultural Improvement & Power       
 District, RB, Series A, 5.00% 1/01/24    1,000  1,086,390 
Salt River Project Agricultural Improvement & Power       
 District, Refunding RB, Salt River Project, Series A,       
 5.00%, 1/01/35    1,500  1,540,125 
Salt Verde Financial Corp., RB, Senior, 5.00%, 12/01/37  1,000  851,080 
      11,446,274 
Total Municipal Bonds in Arizona      81,118,387 
     Guam — 1.6%       
Utilities — 1.6%       
Guam Government Waterworks Authority, Refunding RB,     
 Water, 5.88%, 7/01/35    1,000  970,060 
Total Municipal Bonds in Guam      970,060 
     Puerto Rico — 19.6%       
County/City/Special District/School District — 1.2%       
Puerto Rico Sales Tax Financing Corp., Refunding RB,       
 CAB, Series A (NPFGC), 5.76%, 8/01/41 (d)    5,000  743,200 
State — 8.5%       
Commonwealth of Puerto Rico, GO:       
     Public Improvement, Series A, 5.13%, 7/01/31    75  70,228 
     Series A, 6.00%, 7/01/38    800  812,624 
Puerto Rico Public Buildings Authority, RB, Government       
 Facilities, Series I, 5.25% 7/01/33    800  745,920 
Puerto Rico Public Buildings Authority, RB,       
 Government Facilities:       
     Series M-3 (NPFGC), 6.00%, 7/01/28    900  928,737 
     Series N, 5.50%, 7/01/27    1,000  998,840 
Puerto Rico Sales Tax Financing Corp., RB,       
 1st Sub-Series A, 6.38%, 8/01/39    1,500  1,596,150 
      5,152,499 
Transportation — 2.9%       
Puerto Rico Highway & Transportation Authority,       
 Refunding RB:       
     Series AA (NPFGC), 5.50%, 7/01/18    900  949,248 
     Series CC, 5.50%, 7/01/31    790  776,309 
      1,725,557 

  Par   
Municipal Bonds  (000)  Value 
Puerto Rico (concluded)     
Utilities — 7.0%     
Puerto Rico Aqueduct & Sewer Authority, RB, Senior Lien,   
 Series A (Radian), 6.00%, 7/01/44  $ 2,180  $ 2,202,825 
Puerto Rico Electric Power Authority, RB, Series WW     
 5.38%, 7/01/24  1,000  1,032,420 
Puerto Rico Electric Power Authority, 5.50%, 7/01/38  1,000  1,007,990 
    4,243,235 
Total Municipal Bonds in Puerto Rico    11,864,491 
Total Municipal Bonds — 155.1%    93,952,938 
Municipal Bonds Transferred to     
Tender Option Bond Trusts (e)     
     Arizona — 5.1%     
Utilities — 5.1%     
Phoenix Civic Improvement Corp., RB, Junior Lien,     
 Series A, 5.00%, 7/01/34  3,000  3,100,080 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts — 5.1%    3,100,080 
Total Long-Term Investments     
(Cost — $96,632,344) — 160.2%    97,053,018 
Short-Term Securities  Shares   
CMA Arizona Municipal Money Fund, 0.00% (f)(g)  2,403,565  2,403,565 
Total Short-Term Securities     
(Cost — $2,403,565) — 4.0%    2,403,565 
Total Investments (Cost – $99,035,909*) — 164.2%    99,456,583 
Other Assets Less Liabilities — 2.3%    1,421,443 
Liability for Trust Certificates, Including Interest     
   Expense and Fees Payable — (2.4)%    (1,500,000) 
Preferred Shares, at Redemption Value — (64.1)%    (38,803,971) 
Net Assets Applicable to Common Shares — 100.0%    $ 60,574,055 

* The cost and unrealized appreciation (depreciation) of investments as of
January 31, 2010, as computed for federal income tax purposes, were as follows:

Aggregate cost  $ 97,566,060 
Gross unrealized appreciation  $ 2,641,352 
Gross unrealized depreciation  (2,250,829) 
Net unrealized appreciation  $ 390,523 

(a) Represents a step-up bond that pays an initial coupon rate for the first period and
then a higher coupon rate for the following periods. Rate shown is as of report date.
(b) Security is collateralized by Municipal or US Treasury Obligations.
(c) US government securities, held in escrow, are used to pay interest on this security,
as well as to retire the bond in full at the date indicated, typically at a premium
to par.
(d) Represents a zero-coupon bon. Rate shown reflects current yield as of report date.

See Notes to Financial Statements.

14 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments (concluded) BlackRock MuniYield Arizona Fund, Inc. (MZA)

(e) Securities represent bonds transferred to a tender option bond trust in exchange for
which the Fund acquired residual interest certificates. These securities serve as col-
lateral in a financing transaction. See Note 1 of the Notes to Financial Statements
for details of municipal bonds transferred to tender option bond trusts.
(f) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Net   
Affiliate  Activity  Income 
CMA Arizona Municipal Money Fund  $(1,783,606)   

(g) Represents the current yield as of report date.
Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an
indication of the risk associated with investing in those securities. For information
about the Fund’s policy regarding valuation of investments and other significant
accounting policies, please refer to Note 1 of the Notes to Financial Statements.
The following table summarizes the inputs used as of January 31, 2010 in deter-
mining the fair valuation of the Fund’s investments:

Valuation    Investments in 
Inputs    Securities 
    Assets 
Level 1 — Short-Term Securities  $ 2,403,565 
Level 2 — Long-Term Investments1    97,053,018 
Level 3     
Total  $ 99,456,583 
 1 See above Schedule of Investments for values in each sector.   

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

15


Schedule of Investments January 31, 2010 (Unaudited)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

  Par   
Municipal Bonds  (000)  Value 
     California — 108.8%     
Corporate — 1.5%     
California Pollution Control Financing Authority, RB,     
 Waste Management, Inc. Project, Series C, AMT,     
 6.75%, 12/01/27  $ 3,300  $ 3,412,464 
City of Chula Vista California, Refunding RB, San Diego     
 Gas & Electric, Series A, 5.88%, 2/15/34  975  1,067,674 
    4,480,138 
County/City/Special District/School District — 38.9%     
Arcata Joint Powers Financing Authority California,     
 Tax Allocation Bonds, Refunding, Community     
 Development Project Loan, Series A (AMBAC),     
 6.00%, 8/01/23  2,520  2,520,958 
California State Department of Water Resources,     
 Refunding RB, Water System, Series AF,     
 5.00%, 12/01/29  2,500  2,661,475 
City of Los Angeles California, COP, Senior, Sonnenblick     
 Del Rio West Los Angeles (AMBAC), 6.20%, 11/01/31  2,000  2,039,340 
City of Los Angeles California, Refunding RB, Series A,     
 5.00%, 6/01/39  9,870  10,061,182 
El Monte Union High School District California, GO,     
 Election 2002, Series C (AGM), 5.25%, 6/01/32  10,120  10,310,863 
Fontana Unified School District California, GO, Series A     
 (AGM), 5.25%, 8/01/28  7,000  7,171,780 
Hayward Unified School District California, GO,     
 Election 2008, 5.25%, 8/01/29  5,395  5,526,260 
Los Angeles Municipal Improvement Corp., RB,     
 Real Property, Series E, 6.00%, 9/01/34  1,800  1,860,840 
Marin Community College District, GO, Election of 2004,     
 Series A (NPFGC), 5.00%, 8/01/28  5,885  6,053,076 
Modesto Irrigation District, COP, Series B,     
 5.50%, 7/01/35  3,300  3,456,024 
Morgan Hill Unified School District California, GO, CAB     
 (FGIC), 5.06%, 8/01/26 (a)(b)  7,570  3,738,747 
Murrieta Valley Unified School District Public Financing     
 Authority, Special Tax Bonds, Refunding, Series A     
 (AGC), 5.13%, 9/01/26  6,675  7,011,220 
Oak Grove School District California, GO, Election 2008,     
 Series A, 5.50%, 8/01/33  4,000  4,236,760 
Orange County Sanitation District, COP (NPFGC),     
 5.00%, 2/01/33  5,250  5,356,417 
Pico Rivera Public Financing Authority, RB:     
     5.50%, 9/01/31  1,500  1,530,165 
     5.75%, 9/01/39  4,365  4,448,502 
Pittsburg Redevelopment Agency, Tax Allocation Bonds,     
 Refunding, Subordinate, Los Medanos Community     
 Project, Series A, 6.50%, 9/01/28  2,500  2,729,925 
San Diego Regional Building Authority California,     
 RB, County Operations Center & Annex, Series A,     
 5.38%, 2/01/36  3,200  3,314,304 
San Francisco Bay Area Transit Financing Authority,     
 Refunding RB, Series A (NPFGC), 5.00%, 7/01/34  5,430  5,475,938 
San Jose Evergreen Community College District     
 California, GO, Refunding, CAB, Election 2004,     
 Series A (NPFGC), 5.12%, 9/01/23 (b)  10,005  4,925,862 
San Juan Unified School District California, GO,     
 Election of 2002 (NPFGC), 5.00%, 8/01/28  5,000  5,030,300 
Santa Cruz County Redevelopment Agency California,     
 Tax Allocation Bonds, Live Oak/Soquel Community     
 Improvement, Series A:     
     6.63%, 9/01/29  1,000  1,072,890 
     7.00%, 9/01/36  500  539,045 
Twin Rivers Unified School District, GO, Election of 2006     
 (AGM), 5.00%, 8/01/29  9,390  9,571,884 

    Par   
Municipal Bonds    (000)  Value 
     California (continued)       
County/City/Special District/School District (concluded)     
Vacaville Unified School District California, GO,       
 Election 2001 (NPFGC), 5.00%, 8/01/30  $ 4,745  $ 4,763,078 
Ventura Unified School District California, GO, 1997       
 Election, Series H (AGM), 5.13%, 8/01/34    1,000  1,013,430 
Westminster Redevelopment Agency California,       
 Tax Allocation Bonds, Subordinate, Commercial       
 Redevelopment Project No. 1 (AGC), 6.25%, 11/01/39  1,250  1,403,963 
      117,824,228 
Education — 8.3%       
California Educational Facilities Authority, RB, Pitzer       
 College, 6.00%, 4/01/40    2,500  2,596,175 
California State Enterprise Development Authority,       
 Refunding RB, The Thacher School Project,       
 5.13%, 9/01/39    6,965  6,935,190 
California State University, RB, Systemwide, Series A:       
     5.25%, 11/01/34    1,500  1,528,515 
     5.50%, 11/01/39    2,725  2,781,816 
University of California, RB:       
     Limited Project, Series D (NPFGC), 5.00%, 5/15/32  2,500  2,511,950 
     Series L, 5.00%, 5/15/36    8,500  8,708,080 
      25,061,726 
Health — 17.5%       
ABAG Finance Authority for Nonprofit Corps,       
 Refunding RB, Sharp Healthcare, 6.38%, 8/01/34    1,750  1,831,655 
California Health Facilities Financing Authority,       
 Refunding RB:       
     Catholic Healthcare West, Series A, 6.00%, 7/01/39  10,000  10,430,500 
     Catholic Healthcare West, Series E, 5.63%, 7/01/25  6,000  6,210,360 
     Scripps Health, Series A, 5.00%, 11/15/36 (c)    8,800  8,484,784 
     St. Joseph Health System, Series A, 5.50%, 7/01/29  2,000  2,063,700 
California Statewide Communities Development       
 Authority, RB:       
     Health Facility, Memorial Health Services, Series A,     
     6.00%, 10/01/23    3,270  3,389,780 
     Health Facility, Memorial Health Services, Series A,     
     5.50%, 10/01/33    3,000  3,014,460 
     St. Joseph Health System, Series C (FGIC),       
     5.75%, 7/01/47    7,525  7,692,281 
California Statewide Communities Development       
 Authority, Refunding RB:       
     Catholic Healthcare West, Series D, 5.50%, 7/01/31  5,055  5,054,747 
California Statewide Communities Development       
 Authority, Senior Living, Southern California:       
     6.25%, 11/15/19    500  530,425 
     6.63%, 11/15/24    650  680,173 
     7.00%, 11/15/29    500  527,100 
     7.25%, 11/15/41    1,750  1,855,473 
City of Torrance California, Refunding RB, Torrance       
 Memorial Medical Center, Series A, 6.00%, 6/01/22  1,310  1,346,470 
      53,111,908 
Housing — 1.2%       
California Rural Home Mortgage Finance Authority,       
 RB, AMT:       
     Mortgage-Backed Securities Program, Series B       
     (GNMA), 6.15%, 6/01/20    25  25,483 
     Sub-Series FH-1, , 5.50%, 8/01/47    415  230,914 
Santa Clara County Housing Authority California, RB,       
 John Burns Gardens Apartments Project, Series A,       
 AMT, 6.00%, 8/01/41    3,500  3,503,780 
      3,760,177 

See Notes to Financial Statements.

16 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments (continued)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

  Par   
Municipal Bonds  (000)  Value 
     California (concluded)     
State — 6.1%     
California State Public Works Board, RB:     
     Department of Developmental Services, Porterville,     
     Series C, 6.25%, 4/01/34  $ 1,100  $ 1,107,502 
     Department of Education, Riverside Campus Project,     
     Series B, 6.50%, 4/01/34  10,000  10,248,500 
     Various Capital Projects, Sub-Series I-1,     
     6.38%, 11/01/34  1,850  1,880,655 
State of California, GO, Various Purpose,     
 6.50%, 4/01/33  5,000  5,341,050 
    18,577,707 
Transportation — 4.7%     
County of Orange California, RB, Series B,     
 5.75%, 7/01/34  3,000  3,243,120 
County of Sacramento California, RB, Senior, Series B,     
 5.75%, 7/01/39  900  957,978 
San Francisco City & County Airports Commission, RB,     
 Series E, 6.00%, 5/01/39  4,825  5,167,527 
San Francisco Port Commission California, RB, Series A,     
 5.13%, 3/01/40 (c)  5,000  4,861,550 
    14,230,175 
Utilities — 30.6%     
California Infrastructure & Economic Development Bank,     
 RB, California Independent System Operator, Series A,     
 6.25%, 2/01/39  2,170  2,264,438 
California State Department of Water Resources,     
 Refunding RB, Central Valley Project, Series AE,     
 5.00%, 12/01/28  6,000  6,412,800 
California Statewide Communities Development     
 Authority, RB, Pooled Financing Program, Series C,     
 City of West Sacramento (AGM), 5.25%, 10/01/28  2,380  2,418,699 
City of Chula Vista California, Refunding RB, San Diego     
 Gas & Electric, Series D, 5.88%, 1/01/34  2,500  2,737,625 
Eastern Municipal Water District California, COP,     
 Series H, 5.00%, 7/01/35  7,540  7,560,283 
Los Angeles Department of Water & Power, RB:     
     Power System, Sub-Series A-1 (AMBAC),     
     5.00%, 7/01/37  15,100  15,257,946 
     Power System, Sub-Series A-2 (AGM),     
     5.00%, 7/01/35  7,500  7,635,675 
Metropolitan Water District of Southern California, RB:     
     Series A, 5.00%, 7/01/32  1,240  1,292,216 
     Series A (AGM), 5.00%, 7/01/30  1,000  1,033,990 
     Series C, 5.00%, 7/01/35  7,085  7,292,378 
Metropolitan Water District of Southern California,     
 Refunding RB:     
     Series B, 5.00%, 7/01/35  2,625  2,701,834 
     Series C, 5.00%, 7/01/31  1,750  1,832,968 
Oxnard Financing Authority, RB, Redwood Trunk Sewer     
 & Headworks, Series A (NPFGC), 5.25%, 6/01/34  4,160  4,172,480 
Sacramento Municipal Utility District, RB, Cosumnes     
 Project (NPFGC), 5.13%, 7/01/29  18,500  18,153,495 
Sacramento Regional County Sanitation District,     
 Refunding RB, County Sanitation District 1 (NPFGC),     
 5.00%, 8/01/35  5,425  5,474,313 
San Diego Public Facilities Financing Authority,     
 Refunding RB, Senior Series A, 5.38%, 5/15/34  1,900  1,992,625 
San Francisco City & County Public Utilities Commission,     
 Refunding RB, Series A, 5.13%, 11/01/39  2,295  2,363,207 
Western Municipal Water District Facilities Authority, RB,     
 Series B, 5.00%, 10/01/39  2,000  2,010,540 
    92,607,512 
Total Municipal Bonds in California    329,653,571 

  Par   
Municipal Bonds  (000)  Value 
Puerto Rico — 3.3%     
County/City/Special District/School District — 1.8%     
Puerto Rico Sales Tax Financing Corp., RB, First     
 Sub-Series A, 6.50%, 8/01/44  $ 5,000  $ 5,335,800 
State — 1.5%     
Commonwealth of Puerto Rico, GO, Refunding, Public     
 Improvement, Series B, 6.50%, 7/01/37  4,230  4,461,212 
Total Municipal Bonds in Puerto Rico    9,797,012 
Total Municipal Bonds — 112.1%    339,450,583 
Municipal Bonds Transferred to     
Tender Option Bond Trusts (d)     
California — 44.8%     
Corporate — 8.7%     
University of California, RB, Limited Project, Series B     
 (AGM), 5.00%, 5/15/33  8,488  8,503,979 
University of California, RB, Series L, 5.00%, 5/15/40  11,597  11,830,452 
San Francisco Bay Area Transit Financing Authority,     
 Refunding RB, Series A (NPFGC), 5.00%, 7/01/30  6,000  6,136,920 
    26,471,351 
County/City/Special District/School District — 14.5%     
Contra Costa Community College District California, GO,     
 Election of 2002 (FSA), 5.00%, 8/01/30  10,215  10,400,207 
Fremont Unified School District, Alameda County,     
 California, GO, Election of 2002, Series B (AGM),     
 5.00%, 8/01/30  4,003  4,089,906 
Los Angeles Community College District, California, GO,     
 2008 Election, Series A, 6.00%, 8/01/33  3,828  4,246,729 
San Diego Community College District, California, GO,     
 Election of 2002, 5.25%, 8/01/33  7,732  7,906,928 
Santa Clara County Financing Authority, Refunding RB,     
 Lease, Series L, 5.25%, 5/15/36  10,001  10,319,310 
Sonoma County Junior College District, GO, Refunding,     
 Election of 2002, Series B (AGM), 5.00%, 8/01/28  6,875  7,105,143 
    44,068,223 
Education — 11.5%     
California Educational Facilities Authority, RB, University     
 of Southern California, Series A, 5.25%, 10/01/18  13,845  14,613,398 
California State University, RB, Systemwide, Series A     
 (AGM), 5.00%, 11/01/39  4,840  4,780,516 
Los Angeles Community College District, California, GO,     
 2003 Election, Series E (AGM), 5.00%, 8/01/31  10,002  10,145,687 
Peralta Community College District, California, GO,     
 Election of 2000, Series D (AGM), 5.00%, 8/01/30  1,995  2,038,292 
University of California, RB, Series O, 5.75%, 5/15/34  2,805  3,120,534 
    34,698,427 
Utilities — 10.1%     
Eastern Municipal Water District, California, Water and     
 Sewer, COP, Series H, 5.00%, 7/01/33  4,748  4,789,971 
Metropolitan Water District of Southern California, RB,     
 Series A, 5.00%, 7/01/37  20,000  20,688,200 
San Diego County Water Authority, COP, Series A (AGM),     
 5.00%, 5/01/31  5,010  5,097,574 
    30,575,745 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts — 44.8%    135,813,746 
Total Long-Term Investments     
(Cost — $471,504,220) — 156.9%    475,264,329 

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

17


Schedule of Investments (concluded)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

Short-Term Securities  Shares  Value 
CMA California Municipal Money     
 Fund, 0.04% (e)(f)  10,038,152  $ 10,038,152 
Total Short-Term Securities     
(Cost — $10,038,152) — 3.3%    10,038,152 
Total Investments (Cost – $481,542,372*) — 160.2%  485,302,481 
Liabilities in Excess of Other Assets — (0.6)%    (1,972,839) 
Liability for Trust Certificates, Including Interest     
   Expense and Fees Payable — (24.6)%    (74,438,467) 
Preferred Shares, at Redemption Value — (35.0)%    (105,961,278) 
Net Assets Applicable to Common Shares — 100.0%    $302,929,897 

* The cost and unrealized appreciation (depreciation) of investments as of January 31,
2010, as computed for federal income tax purposes, were as follows:

Aggregate cost  $ 407,491,842 
Gross unrealized appreciation  $ 7,730,477 
Gross unrealized depreciation  (4,299,203) 
Net unrealized appreciation  $ 3,431,274 

(a) Security is collateralized by Municipal or US Treasury Obligations.
(b) Represents a zero-coupon bond. Rate shown reflects the current yield as of
report date.
(c) When-issued security. Unsettled when-issued security transactions were as follows:

  Market  Unrealized 
Counterparty  Value  Depreciation 
JPMorgan Chase Bank NA  $8,484,784  $(123,816) 
Jeffries & Co.  $4,861,550  $ (44,200) 

(d) Securities represent bonds transferred to a tender option bond trust in exchange for
which the Fund acquired residual interest certificates. These securities serve as col-
lateral in a financing transaction. See Note 1 of the Notes to Financial Statements
for details of municipal bonds transferred to tender option bond trusts.
(e) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Net   
   Affiliate  Activity  Income 
   CMA California Municipal Money Fund  $2,430,455  $1,349 
(f) Represents the current yield as of report date.     

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an indi-
cation of the risk associated with investing in those securities. For information about
the Fund’s policy regarding valuation of investments and other significant accounting
policies, please refer to the Note 1 of the Notes to Financial Statements.
The following table summarizes the inputs used as of January 31, 2010 in deter-
mining the fair valuation of the Fund’s investments:

Valuation  Investments in 
Inputs  Securities 
  Assets 
Level 1 — Short-Term Securities  $ 10,038,152 
Level 2 — Long-Term Investments1  475,264,329 
Level 3   
Total  $ 485,302,481 

1 See above Schedule of Investments for values in each sector.

See Notes to Financial Statements.

18 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments January 31, 2010 (Unaudited)

BlackRock MuniYield Investment Fund (MYF)
(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)  Value 
Arizona — 0.7%       
Pima County IDA, Refunding IDRB, Tucson Electric Power,     
 5.75%, 9/01/29  $ 1,230  $ 1,242,608 
California — 10.9%       
California Health Facilities Financing Authority, RB,       
 Cedars-Sinai Medical Center, 5.00%, 8/15/39    1,590  1,467,983 
California Health Facilities Financing Authority,       
 Refunding RB, Series A:       
     Catholic Healthcare West, 6.00%, 7/01/39    710  740,566 
     St. Joseph Health System, 5.75%, 7/01/39    2,700  2,781,000 
California State Public Works Board, RB:       
     Department of General Services, Buildings 8 & 9,     
     Series A, 6.25%, 4/01/34    4,525  4,555,861 
     Various Capital Projects, Sub-Series I-1,       
     6.38%, 11/01/34    1,265  1,285,961 
Los Angeles Department of Water & Power, RB, Power       
 System, Sub-Series A-1, 5.25%, 7/01/38    3,300  3,493,149 
San Diego Regional Building Authority California,       
 RB, County Operations Center & Annex, Series A,       
 5.38%, 2/01/36    3,310  3,428,233 
San Francisco City & County Airports Commission,       
 Refunding RB, 2nd Series A-3, AMT, 6.75%, 5/01/19  2,500  2,636,475 
      20,389,228 
Colorado — 2.2%       
City & County of Denver Colorado, Refunding RB,       
 Series A, 5.25%, 11/15/36    4,050  4,117,919 
District of Columbia — 1.1%       
District of Columbia Water & Sewer Authority, RB,       
 Series A, 5.25%, 10/01/29    2,000  2,119,860 
Florida — 31.5%       
Broward County Educational Facilities Authority, RB,       
 Nova Southeastern University (AGC), 5.00%, 4/01/31  2,110  2,125,445 
City of Jacksonville Florida, RB, Series B (NPFGC),       
 5.13%, 10/01/32    1,500  1,504,155 
City of Jacksonville Florida, Refunding RB (NPFGC),       
 5.25%, 10/01/32    2,315  2,344,146 
City of Miami Beach Florida, RB, Water and Sewer       
 (AMBAC), 5.75%, 9/01/25    3,000  3,072,540 
City of Port St. Lucie Florida, RB (NPFGC),       
 5.25%, 9/01/25    1,215  1,242,751 
County of Hillsborough Florida, RB (AMBAC),       
 5.40%, 5/01/30 (a)    1,055  1,185,936 
County of Miami-Dade Florida, RB, AMT, Series A:       
     (AGM), 5.00%, 10/01/33    2,560  2,473,651 
     Miami International Airport (AGM), 5.25%, 10/01/41  1,675  1,649,439 
     Miami International Airport (AGM), 5.50%, 10/01/41  2,930  2,959,945 
     Miami International Airport (NPFGC),       
     6.00%, 10/01/29    3,275  3,321,276 
County of Orange Florida, Refunding RB (AMBAC),       
 5.00%, 10/01/29    1,750  1,794,152 
County of Osceola Florida, RB, Series A (NPFGC),       
 5.50%, 10/01/27    1,760  1,798,386 
County of Sumter Florida, RB (AMBAC):       
     5.00%, 6/01/26    2,190  2,247,247 
     5.00%, 6/01/30    2,475  2,508,363 
Duval County Housing Finance Authority, Refunding RB,     
 AMT (GNMA), 5.40%, 10/01/21    645  647,709 
Florida Housing Finance Corp., Refunding RB,       
 Homeowner Mortgage, Series 4, AMT (AGM),       
 6.25%, 7/01/22    350  364,315 
Florida Municipal Loan Council, RB (NPFGC):       
     Series A-1, 5.13%, 7/01/34    1,580  1,570,141 
     Series B, 5.38%, 11/01/30    4,250  4,277,540 
Hillsborough County Aviation Authority, Florida,       
 Refunding RB, Series C, AMT (AGC), 5.75%, 10/01/26  1,000  1,045,020 

    Par   
Municipal Bonds    (000)  Value 
Florida (concluded)       
Hillsborough County IDA, RB, AMT, National Gypsum Co.:     
     Series A, 7.13%, 4/01/30  $ 2,500  $ 1,925,075 
     Series B, 7.13%, 4/01/30    3,750  2,887,612 
Lee County Housing Finance Authority, RB, Multi-County     
 Program, Series A-1, AMT (GNMA), 7.13%, 3/01/28  30  30,456 
Manatee County Housing Finance Authority,       
 Refunding RB, S/F, Sub-Series 1, AMT (GNMA),       
 6.25%, 11/01/28    85  86,776 
Miami-Dade County Housing Finance Authority, Florida,     
 Refunding RB, Home Ownership Mortgage, Series A1,     
 AMT (GNMA), 6.30%, 10/01/20    365  372,742 
Pinellas County Housing Finance Authority, Refunding RB,     
 Multi-County Program, Series A1, AMT (GNMA):       
     6.30%, 9/01/20    240  245,090 
     6.35%, 9/01/25    340  347,317 
Polk County School Board, COP, Master Lease, Series A     
 (AGM), 5.50%, 1/01/25    4,385  4,507,473 
Santa Rosa County School Board, COP, Refunding,       
 Series 2 (NPFGC), 5.25%, 2/01/26    1,180  1,233,065 
South Lake County Hospital District, RB, South Lake       
 Hospital Inc., 6.38%, 10/01/34    1,150  1,152,288 
Village Center Community Development District,       
 RB (NPFGC):       
     5.13%, 10/01/28    4,960  4,596,829 
     Series A, 5.38%, 11/01/34    1,995  1,688,009 
     Series A, 5.13%, 11/01/36    1,000  804,080 
Volusia County IDA, RB, Student Housing, Stetson       
 University Project, Series A (CIFG), 5.00%, 6/01/35  1,000  838,630 
      58,847,599 
Georgia — 8.4%       
City of Atlanta Georgia, RB, General, Subordinate Lien,     
 Series C (AGM), 5.00%, 1/01/33    3,270  3,278,862 
County of Fulton, Georgia, RB (NPFGC), 5.25%, 1/01/35  1,000  1,022,690 
Metropolitan Atlanta Rapid Transit Authority, RB,       
 3rd Series, 5.00%, 7/01/39    4,815  4,983,092 
Municipal Electric Authority of Georgia, Refunding RB,       
 Project One, Sub-Series D, 6.00%, 1/01/23    5,600  6,329,848 
      15,614,492 
Illinois — 4.6%       
Illinois Finance Authority, Refunding RB:       
Central DuPage Health, Series B, 5.38%, 11/01/39  1,200  1,227,792 
     Northwestern Memorial Hospital, Series A,       
     6.00%, 8/15/39    4,160  4,555,242 
State of Illinois, RB, Build Illinois, Series B,       
 5.25%, 6/15/34    2,700  2,782,512 
      8,565,546 
Indiana — 2.6%       
Indiana Municipal Power Agency, RB, Indiana Municipal     
 Power Agency, Series B, 6.00%, 1/01/39    4,525  4,823,831 
Kansas — 1.8%       
Kansas Development Finance Authority, Refunding RB,     
 Adventist Health, 5.50%, 11/15/29    3,250  3,415,490 
Kentucky — 3.5%       
Louisville & Jefferson County Metropolitan       
 Government, RB:       
     Parking Authority, Series A, 5.75%, 12/01/34    3,200  3,491,008 
Refunding, Jewish Hospital & St. Mary’s HealthCare,     
     6.13%, 2/01/37    2,955  3,046,309 
      6,537,317 
Maine — 1.2%       
Maine State Housing Authority, RB, Series C, AMT,       
 5.45%, 11/15/23    2,285  2,288,039 

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

19


Schedule of Investments (continued)

BlackRock MuniYield Investment Fund (MYF)
(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)  Value 
Massachusetts — 2.6%       
Massachusetts HFA, Refunding HRB, Series F, AMT,       
 5.70%, 6/01/40  $ 2,110  $ 2,117,069 
Massachusetts Health & Educational Facilities Authority,     
 RB, Tufts University, 5.38%, 8/15/38    1,500  1,610,925 
Massachusetts State College Building Authority, RB,       
 Series A, 5.50%, 5/01/39    1,000  1,044,140 
      4,772,134 
Michigan — 2.3%       
Michigan State Building Authority, Refunding RB,       
 Facilities Program, Series I, 6.00%, 10/15/38    1,250  1,338,200 
Michigan State Hospital Finance Authority, Refunding RB,     
 Hospital, Henry Ford Health, 5.75%, 11/15/39    735  717,529 
Royal Oak Hospital Finance Authority Michigan,       
 Refunding RB, William Beaumont Hospital,       
 8.25%, 9/01/39    1,970  2,284,057 
      4,339,786 
Nevada — 5.0%       
City of Las Vegas Nevada, GO, Limited Tax, Performing       
 Arts Center, 6.00%, 4/01/34    2,850  3,127,732 
County of Clark, Nevada, RB, Series B,       
 5.75%, 7/01/42 (b)    6,055  6,220,544 
      9,348,276 
New Jersey — 2.8%       
New Jersey EDA, Refunding RB, New Jersey American       
 Water Co., Series A, AMT, 5.70%, 10/01/39    2,250  2,215,912 
New Jersey Transportation Trust Fund Authority, RB,       
 Transportation System, Series A, 5.88%, 12/15/38    2,670  2,899,460 
      5,115,372 
New York — 7.3%       
Long Island Power Authority, Refunding RB, Series A,       
 5.50%, 4/01/24    1,600  1,745,424 
New York City Transitional Finance Authority, RB, Fiscal     
 2009, Series S-3, 5.25%, 1/15/39    2,500  2,607,000 
New York State Dormitory Authority, ERB, Series B,       
 5.25%, 3/15/38    5,700  6,003,696 
Triborough Bridge & Tunnel Authority, RB, General,       
 Series A-2, 5.38%, 11/15/38    3,030  3,238,767 
      13,594,887 
North Carolina — 1.7%       
City of Charlotte North Carolina, Refunding RB, Series A,     
 5.50%, 7/01/34 (b)    350  370,482 
North Carolina Eastern Municipal Power Agency,       
 Refunding RB, Series B, 5.00%, 1/01/26    885  910,639 
North Carolina Medical Care Commission, RB, Duke       
 University Health System, Series A, 5.00%, 6/01/42  1,270  1,263,853 
North Carolina Municipal Power Agency, No. 1 Catawba,     
 Refunding RB, Series A, 5.00%, 1/01/30    630  642,241 
      3,187,215 
Ohio — 0.7%       
Ohio Air Quality Development Authority, RB, Ohio Valley     
 Electric Corp., 5.63%, 10/01/19    1,215  1,247,258 
Pennsylvania — 3.7%       
Pennsylvania Economic Development Financing Authority,     
 RB, American Water Co. Project, 6.20%, 4/01/39    1,075  1,153,346 
Pennsylvania Turnpike Commission, RB, Sub-Series B,       
 5.25%, 6/01/39    5,650  5,699,381 
      6,852,727 

  Par   
Municipal Bonds  (000)  Value 
Puerto Rico — 0.9%     
Puerto Rico Housing Finance Authority, Refunding     
 RB, Subordinate, Capital Fund Modernization,     
 5.13%, 12/01/27  $ 1,730  $ 1,731,713 
Texas — 6.1%     
City of Houston Texas, RB, Senior Lien, Series A,     
 5.50%, 7/01/39  1,170  1,242,797 
Conroe ISD Texas, GO, School Building, Series A,     
 5.75%, 2/15/35  1,800  1,934,082 
Harris County Health Facilities Development Corp.,     
 Refunding RB, Memorial Hermann Healthcare     
 System, B, 7.25%, 12/01/35  800  896,288 
Lower Colorado River Authority, RB, 5.75%, 5/15/28  1,620  1,711,984 
North Texas Tollway Authority, RB, System, First Tier,     
 Series K-1 (AGC), 5.75%, 1/01/38  1,750  1,866,812 
Texas Private Activity Bond Surface Transportation Corp.,     
 RB, Senior Lien, Note Mobility, 6.88%, 12/31/39  3,600  3,747,492 
    11,399,455 
Utah — 1.3%     
City of Riverton Utah, RB, IHC Health Services, Inc.,     
 5.00%, 8/15/41  2,370  2,366,208 
Virginia — 1.9%     
Virginia Public School Authority, RB, School Financing,     
 6.50%, 12/01/35  1,700  1,948,251 
Virginia Small Business Financing Authority, Refunding     
 RB, Sentara Healthcare, 5.00%, 11/01/40  1,650  1,644,737 
    3,592,988 
Wyoming — 1.3%     
County of Sweetwater Wyoming, Refunding RB, Idaho     
 Power Co. Project, 5.25%, 7/15/26  2,430  2,511,356 
Total Municipal Bonds — 106.1%    198,021,304 
Municipal Bonds Transferred to     
Tender Option Bond Trusts (c)     
California — 15.4%     
Bay Area Toll Authority, Refunding RB, San Francisco     
 Bay Area, Series F-1, 5.63%, 4/01/44  2,680  2,842,778 
California Educational Facilities Authority, RB, University     
 of Southern California, Series A, 5.25%, 10/01/18  4,200  4,433,100 
Los Angeles Community College District California, GO,     
 2008 Election, Series A, 6.00%, 8/01/33  7,697  8,537,810 
Los Angeles Unified School District California, GO,     
 Series I, 5.00%, 1/01/34  790  788,870 
San Diego Public Facilities Financing Authority,     
 Refunding RB, Series B, 5.50%, 8/01/39  8,415  8,853,758 
University of California, RB, Series O, 5.75%, 5/15/34  3,000  3,337,470 
    28,793,786 
Colorado — 1.2%     
Colorado Health Facilities Authority, Refunding RB,     
 Catholic Healthcare, Series A, 5.50%, 7/01/34  2,149  2,265,680 
District of Columbia — 3.7%     
District of Columbia, RB, Series A, 5.50%, 12/01/30  2,805  3,115,345 
District of Columbia Water & Sewer Authority, RB,     
 Series A, 5.50%, 10/01/39  3,507  3,743,998 
    6,859,343 
Florida — 11.7%     
City of Jacksonville, Florida, RB, Better Jacksonville     
 (NPFGC), 5.00%, 10/01/27  2,700  2,760,642 
Hillsborough County Aviation Authority. Florida, RB,     
 Series A, AMT (AGC), 5.50%, 10/01/38  3,869  3,908,433 

See Notes to Financial Statements.

20 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments (continued)

BlackRock MuniYield Investment Fund (MYF)
(Percentages shown are based on Net Assets)

Municipal Bonds Transferred to    Par   
Tender Option Bond Trusts (c)    (000)  Value 
Florida (concluded)       
JEA, RB, Issue Three Series Two River Power Pike,       
 5.00%, 10/01/37  $ 2,100  $ 2,105,166 
Lee County Housing Finance Authority, RB, Multi-County     
 Program, Series A-2, AMT (GNMA), 6.00%, 9/01/40  2,250  2,433,668 
Manatee County Housing Finance Authority, RB, Series A,     
 AMT (GNMA), 5.90%, 9/01/40    1,141  1,187,886 
South Broward Hospital District. Florida, RB (NPFGC),       
 5.63%, 5/01/32 (a)    8,500  9,454,975 
      21,850,770 
Illinois — 4.2%       
Illinois Finance Authority, RB, University of Chicago,       
 Series B, 6.25%, 7/01/38    5,300  5,983,647 
Illinois State Toll Highway Authority, RB, Series B,       
 5.50%, 1/01/33    1,750  1,869,974 
      7,853,621 
Nevada — 6.3%       
Clark County Water Reclamation District, GO:       
Limited Tax, 6.00%, 7/01/38    5,000  5,542,900 
Clark County Water Reclamation District       
Series B, 5.50%, 7/01/29    5,668  6,185,995 
      11,728,895 
New Hampshire — 1.2%       
New Hampshire Health & Education Facilities Authority,     
 Refunding RB, Dartmouth College, 5.25%, 6/01/39  2,159  2,318,695 
New Jersey — 1.2%       
New Jersey State Housing & Mortgage Finance Agency,     
 RB, S/F Housing, Series CC, 5.25%, 10/01/29    2,291  2,349,130 
New York — 1.5%       
New York City Municipal Water Finance Authority, RB,       
 Series FF-2, 5.50%, 6/15/40    2,504  2,740,226 
South Carolina — 1.9%       
South Carolina State Public Service Authority, RB,       
 Santee Cooper, Series A, 5.50%, 1/01/38    3,240  3,485,689 
Texas — 5.3%       
City of San Antonio, Texas, Refunding RB, Series A,       
 5.25%, 2/01/31    3,989  4,319,226 
Harris County Cultural Education Facilities Finance       
 Corporation, RB, Texas Childrens Hospital Project,       
 5.50%, 10/01/39    5,400  5,542,128 
      9,861,354 
Virginia — 1.0%       
Fairfax County IDA Virginia, Refunding RB, Health Care,     
 Inova Health System, Series A, 5.50%, 5/15/35    1,749  1,819,634 
Wisconsin — 1.8%       
Wisconsin Health & Educational Facilities Authority,       
 Refunding RB, Froedtert & Community Health, Inc.,       
 5.25%, 4/01/39    3,289  3,288,980 
Total Municipal Bonds Transferred to       
Tender Option Bond Trusts — 56.4%      105,215,803 
Total Long-Term Investments       
(Cost — $294,106,115) — 162.5%      303,237,107 

Short-Term Securities  Shares  Value 
FFI Institutional Tax-Exempt Fund, 0.16% (d)(e)  1,223,002  $ 1,223,002 
Total Short-Term Securities     
(Cost — $1,223,002) — 0.7%    1,223,002 
Total Investments (Cost — $295,329,117*) — 163.2%    304,460,109 
Liabilities in Excess of Other Assets — (1.3)%    (2,335,732) 
Liability for Trust Certificates, Including Interest     
   Expense and Fees Payable — (30.0)%    (56,066,743) 
Preferred Shares, at Redemption Value — (31.9)%    (59,478,235) 
Net Assets Applicable to Common Shares — 100.0%    $186,579,399 

* The cost and unrealized appreciation (depreciation) of investments as of
January 31, 2010, as computed for federal income tax purposes, were as follows:

Aggregate cost  $ 240,547,021 
Gross unrealized appreciation  $ 12,121,915 
Gross unrealized depreciation  (4,231,201) 
Net unrealized appreciation  $ 7,890,714 

(a) US government securities, held in escrow, are used to pay interest on this security,
as well as to retire the bond in full at the date indicated, typically at a premium
to par.
(b) When-issued security. Unsettled when-issued security transactions were as follows:

    Unrealized 
    Appreciation 
Counterparty  Value  (Depreciation) 
Citigroup NA  $6,220,544     $ (18,528) 
Merrill Lynch & Co.  $ 370,482     $ 4,141 

(c) Securities represent bonds transferred to a tender option bond trust in exchange for
which the Fund acquired residual interest certificates. These securities serve as col-
lateral in a financing transaction. See Note 1 of the Notes to Financial Statements
for details of municipal bonds transferred to tender option bond trusts.
(d) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Net   
     Affiliate  Activity  Income 
     FII Institutional Tax-Exempt Fund  $(177,049)  $6,758 
(e) Represents the current yield as of report date.     

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

21


Schedule of Investments (concluded)

BlackRock MuniYield Investment Fund (MYF)
(Percentages shown are based on Net Assets)

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an indi-
cation of the risk associated with investing in those securities. For information about
the Fund’s policy regarding valuation of investments and other significant accounting
policies, please refer to Note 1 of the Notes to Financial Statements.
The following table summarizes the inputs used as of January 31, 2010 in deter-
mining the fair valuation of the Fund’s investments:

Valuation  Investments in 
Inputs  Securities 
  Assets 
Level 1 — Short-Term Securities  $ 1,223,002 
Level 2 — Long-Term Investments1  303,237,107 
Level 3   
Total  $ 304,460,109 

1 See above Schedule of Investments for values in each state or
political subdivision.

See Notes to Financial Statements.

22 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments January 31, 2010 (Unaudited)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

    Par   
Municipal Bonds    (000)  Value 
     New Jersey — 127.8%       
Corporate — 1.4%       
New Jersey EDA, Refunding RB, New Jersey American       
 Water Co., Series A, AMT, 5.70%, 10/01/39  $ 2,925  $ 2,880,686 
County/City/Special District/School District — 19.6%     
Burlington County Bridge Commission, RB, Governmental     
 Leasing Program, 5.25%, 8/15/20 (a)    1,000  1,112,150 
City of Perth Amboy New Jersey, GO, CAB (AGM) (b):       
     5.64%, 7/01/33    1,575  1,419,280 
     5.63%, 7/01/34    1,925  1,727,668 
County of Hudson New Jersey, COP, Refunding (NPFGC),     
 6.25%, 12/01/16    1,500  1,718,925 
Essex County Improvement Authority, Refunding RB,       
 Project Consolidation (NPFGC), 5.50%, 10/01/29    5,085  5,708,218 
Hudson County Improvement Authority, RB,       
 Harrison Parking Facility Project, Series C (AGC),       
 5.38%, 1/01/44    4,800  5,055,168 
Hudson County Improvement Authority, Refunding       
 RB, Hudson County Lease Project (NPFGC),       
 5.38%, 10/01/24    4,500  4,535,460 
Middlesex County Improvement Authority, RB:       
     Golf Course Projects, 5.25%, 6/01/22    1,455  1,602,508 
     Senior, Heldrich Center Hotel, Series A,       
     5.00%, 1/01/20    655  366,806 
Monmouth County Improvement Authority, RB,       
 Governmental Loan (AMBAC):       
     5.00%, 12/01/15    1,215  1,255,945 
     5.00%, 12/01/15 (a)    1,020  1,101,947 
     5.00%, 12/01/16    1,280  1,315,187 
     5.00%, 12/01/16 (a)    1,065  1,150,562 
Morristown Parking Authority, RB (NPFGC),       
 4.50%, 8/01/37    585  563,542 
Newark Housing Authority, Refunding RB, Newark       
 Redevelopment Project (NPFGC), 4.38%, 1/01/37    2,875  2,652,964 
Salem County Improvement Authority, RB, Finlaw Street     
 Office Building (AGM):       
     5.38%, 8/15/28    500  542,690 
     5.25%, 8/15/38    500  522,130 
South Jersey Port Corp., Refunding RB:       
     4.75%, 1/01/18    4,280  4,408,058 
     4.85%, 1/01/19    2,485  2,551,598 
     5.00%, 1/01/20    2,000  2,052,920 
      41,363,726 
Education — 15.9%       
New Jersey Educational Facilities Authority, RB:       
     Georgian Court College Project, Series C,       
     6.50%, 7/01/33 (a)    2,000  2,362,480 
     Montclair State University, Series J, 5.25%, 7/01/38  1,140  1,156,997 
     Rider University, Series A (Radian), 5.50%, 7/01/23  1,255  1,272,608 
     Rider University, Series A (Radian), 5.25%, 7/01/34  1,450  1,334,058 
     Rider University, Series C (Radian), 5.00%, 7/01/37  1,750  1,583,260 
New Jersey Educational Facilities Authority, Refunding RB:     
     College of New Jersey, Series D (AGM),       
     5.00%, 7/01/35    6,115  6,279,677 
     Georgian Court University, Series D, 5.25%, 7/01/37  1,000  952,540 
     Montclair State University, Series L (NPFGC),       
     5.00%, 7/01/34 (a)    5,305  6,123,561 
     Ramapo College, Series I (AMBAC), 4.25%, 7/01/31  750  703,170 
     Ramapo College, Series I (AMBAC), 4.25%, 7/01/36  810  731,981 
     Rider University (Radian), 5.00%, 7/01/17    1,000  1,015,450 
     Rowan University, Series B (AGC), 5.00%, 7/01/24  1,800  1,946,304 
     University of Medicine & Dentistry, Series B,       
     7.13%, 12/01/23    1,300  1,473,888 
     University of Medicine & Dentistry, Series B,       
     7.50%, 12/01/32    1,625  1,831,863 

  Par   
Municipal Bonds  (000)  Value 
     New Jersey (continued)     
Education (concluded)     
New Jersey Higher Education Assistance Authority,     
 Refunding RB, Series 1A:     
     5.00%, 12/01/25  $ 1,035  $ 1,048,579 
     5.00%, 12/01/26  490  492,994 
New Jersey State Higher Education Assistance Authority,     
 RB, Series A, AMT (AMBAC), 5.30%, 6/01/17  3,170  3,182,426 
    33,491,836 
Health — 19.6%     
New Jersey EDA, RB:     
     CAB, St. Barnabas Health, Series A (NPFGC),     
     6.25%, 7/01/24 (c)  3,850  1,335,065 
     Masonic Charity Foundation of New Jersey,     
     5.25%, 6/01/24  1,425  1,439,421 
     Masonic Charity Foundation of New Jersey,     
     5.25%, 6/01/32  685  651,250 
New Jersey EDA, Refunding RB, First Mortgage,     
 Winchester, Series A:     
     5.75%, 11/01/24  2,500  2,492,375 
     5.80%, 11/01/31  1,000  979,340 
New Jersey Health Care Facilities Financing Authority, RB:     
     Children’s Specialized Hospital, Series A,     
     5.50%, 7/01/36  1,540  1,454,053 
     Health System, Catholic Health East, Series A,     
     5.38%, 11/15/33 (a)  1,100  1,233,573 
     Hospital Asset Transformation Program, Series A,     
     5.25%, 10/01/38  1,300  1,313,429 
     Hunterdon Medical Center, Series A,     
     5.13%, 7/01/35  1,950  1,837,719 
     Meridian Health, Series I (AGC), 5.00%, 7/01/38  1,000  993,950 
     Pascack Valley Hospital Association,     
     6.63%, 7/01/36 (d)(e)  1,845  18 
     Robert Wood University (AMBAC), 5.70%, 7/01/20  4,000  4,020,880 
     Somerset Medical Center, 5.50%, 7/01/33  1,875  1,394,850 
     Southern Ocean County Hospital (Radian),     
     5.13%, 7/01/31  2,000  1,738,340 
     Virtua Health (AGC), 5.50%, 7/01/38  2,500  2,608,175 
New Jersey Health Care Facilities Financing Authority,     
 Refunding RB:     
     Atlantic City Medical Center, 6.25%, 7/01/17 (a)  500  559,970 
     Atlantic City Medical Center, 5.75%, 7/01/25 (a)  1,060  1,174,522 
     Atlantic City Medical System, 6.25%, 7/01/17  520  547,841 
     Atlantic City Medical System, 5.75%, 7/01/25  520  531,861 
     CAB, St. Barnabas Health, Series B,     
     5.90%, 7/01/30 (c)  2,000  393,620 
     CAB, St. Barnabas Health, Series B,     
     5.69%, 7/01/36 (c)  500  57,870 
     CAB, St. Barnabas Health, Series B,     
     5.18%, 7/01/37 (c)  13,250  1,413,378 
     Capital Health System Obligation Group, Series A,     
     5.75%, 7/01/23 (a)  1,650  1,871,809 
     Meridian Health System Obligation Group (AGM),     
     5.25%, 7/01/19  1,500  1,504,335 
     Meridian Health System Obligation Group (AGM),     
     5.38%, 7/01/24  2,250  2,255,445 
     Meridian Health System Obligation Group (AGM),     
     5.25%, 7/01/29  2,195  2,196,800 
     South Jersey Hospital, 5.00%, 7/01/36  385  367,610 
     South Jersey Hospital, 5.00%, 7/01/46  1,650  1,539,796 
     St. Barnabas Health Care System, Series A,     
     5.00%, 7/01/29  4,155  3,328,363 
    41,235,658 

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

23


Schedule of Investments (continued)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

  Par   
Municipal Bonds  (000)  Value 
     New Jersey (continued)     
Housing — 16.2%     
New Jersey State Housing & Mortgage Finance     
 Agency, RB:     
     Capital Fund Program, Series A (AGM),     
     4.70%, 11/01/25  $ 6,950  $ 7,001,013 
     Home Buyer, Series CC, AMT (NPFGC),     
     5.80%, 10/01/20  4,515  4,694,110 
     S/F Housing, Series CC, 5.00%, 10/01/34  3,455  3,449,887 
     S/F Housing, Series U, AMT, 4.95%, 10/01/32  700  679,525 
     S/F Housing, Series X, AMT, 4.85%, 4/01/16  3,605  3,760,159 
     Series A, 4.75%, 11/01/29  2,305  2,261,389 
     Series A, AMT (FGIC), 4.90%, 11/01/35  1,365  1,277,736 
     Series AA, 6.50%, 10/01/38  2,025  2,203,747 
New Jersey State Housing & Mortgage Finance     
 Agency, Refunding RB, S/F Housing, Series T, AMT,     
 4.65%, 10/01/32  4,945  4,673,025 
Newark Housing Authority, RB, South Ward Police     
 Facility (AGC):     
     5.75%, 12/01/30  1,115  1,192,704 
     6.75%, 12/01/38  2,670  2,996,274 
    34,189,569 
State — 34.6%     
Garden State Preservation Trust, RB (AGM):     
     CAB, Series B, 5.12%, 11/01/23 (c)  6,860  3,725,940 
     CAB, Series B, 5.25%, 11/01/28 (c)  4,540  1,834,569 
     Election of 2005, Series A, 5.80%, 11/01/22  4,300  4,983,012 
New Jersey EDA, RB:     
     Department of Human Services, Pooled,     
     5.00%, 7/01/12  220  237,208 
     Motor Vehicle Surcharge, Series A (NPFGC),     
     5.25%, 7/01/33  14,000  14,203,280 
     School Facilities Construction, Series L (AGM),     
     5.00%, 3/01/30  5,800  5,986,238 
     School Facilities Construction, Series O,     
     5.25%, 3/01/23  2,400  2,574,024 
     School Facilities Construction, Series P,     
     5.00%, 9/01/15  3,000  3,370,560 
     School Facilities Construction, Series P,     
     5.25%, 9/01/16  3,010  3,386,190 
     School Facilities Construction, Series Z (AGC),     
     5.50%, 12/15/34  3,665  3,940,315 
     School Facilities Construction, Series Z (AGC),     
     6.00%, 12/15/34  3,600  4,029,156 
New Jersey EDA, Refunding RB, School Facilities     
 Construction, Series AA, 5.50%, 12/15/29  3,300  3,571,029 
New Jersey State Transit Corp., COP, Subordinate,     
 Federal Transit Administration Grants, Series B,     
 5.75%, 9/15/14  3,620  3,925,781 
New Jersey Transportation Trust Fund Authority, RB:     
     CAB, Transportation System, Series C (AMBAC),     
     5.05%, 12/15/35 (c)  4,140  835,742 
     Transportation System, Series A, 6.00%, 12/15/38  2,900  3,181,938 
     Transportation System, Series A (AGC),     
     5.63%, 12/15/28  1,250  1,392,563 
New Jersey Transportation Trust Fund Authority,     
 Transportation System, Refunding RB:     
     Series A, 5.50%, 12/15/21  3,525  3,999,430 
     Series B (NPFGC), 5.50%, 12/15/21  5,865  6,731,964 
State of New Jersey, COP, Equipment Lease Purchase,     
 Series A, 5.25%, 6/15/28  1,100  1,136,124 
    73,045,063 
Tobacco — 1.2%     
Tobacco Settlement Financing Corp., New Jersey,     
 Refunding RB, Series 1A, 4.50%, 6/01/23  2,720  2,535,802 

    Par   
Municipal Bonds    (000)  Value 
     New Jersey (concluded)       
Transportation — 11.0%       
New Jersey State Turnpike Authority, RB:       
     Growth & Income Securities, Series B (AMBAC),       
     6.27%, 1/01/35 (c)  $ 4,870  $ 3,824,752 
     Series E, 5.25%, 1/01/40    5,475  5,667,939 
New Jersey Transportation Trust Fund Authority, RB,       
 Transportation System, Series A:       
     5.88%, 12/15/38    3,050  3,312,117 
     (AGC), 5.50%, 12/15/38    1,000  1,073,980 
Port Authority of New York & New Jersey, RB,       
 Consolidated, 93rd Series, 6.13%, 6/01/94    5,000  5,810,900 
Port Authority of New York & New Jersey, Refunding RB,     
 Consolidated, 152nd Series, AMT, 5.75%, 11/01/30  3,300  3,486,021 
      23,175,709 
Utilities — 8.3%       
Cumberland County Improvement Authority, RB, Series A,     
 5.00%, 1/01/30    1,210  1,187,506 
New Jersey EDA, RB, AMT:       
     New Jersey American Water Co., Inc. Project, Series A     
     (FGIC), 6.88%, 11/01/34    6,670  6,672,935 
     Series A, American Water (AMBAC),       
     5.25%, 11/01/32    685  641,770 
New Jersey EDA, Refunding RB, United Water of       
 New Jersey Inc., Series B (AMBAC), 4.50%, 11/01/25  4,500  4,651,965 
Rahway Valley Sewerage Authority, RB, CAB, Series A       
 (NPFGC), 4.87%, 9/01/31 (c)    6,000  1,663,260 
Union County Utilities Authority, Refunding RB, Senior       
 Lease, Ogden Martin, Series A, AMT (AMBAC):       
     5.38%, 6/01/17    1,585  1,588,186 
     5.38%, 6/01/18    1,175  1,176,292 
      17,581,914 
Total Municipal Bonds in New Jersey      269,499,963 
     Pennsylvania — 3.7%       
Transportation — 3.7%       
Delaware River Port Authority Pennsylvania       
 & New Jersey, RB (AGM), 6.00%, 1/01/19    7,860  7,890,261 
Total Municipal Bonds in Pennsylvania      7,890,261 
     Puerto Rico — 6.4%       
Education — 0.5%       
Puerto Rico Industrial Tourist Educational Medical       
 & Environmental Control Facilities Financing Authority,     
 RB, University Plaza Project, Series A (NPFGC),       
 5.00%, 7/01/33    1,215  1,126,438 
Housing — 1.0%       
Puerto Rico Housing Finance Authority, Refunding RB,       
 Subordinate, Capital Fund Modernization,       
 5.13%, 12/01/27    2,025  2,027,005 
State — 2.9%       
Puerto Rico Sales Tax Financing Corp., RB,       
 First Sub-Series A, 5.75%, 8/01/37    6,000  6,118,740 
Transportation — 1.5%       
Puerto Rico Highway & Transportation Authority,       
 Refunding RB, Series CC (AGC), 5.50%, 7/01/31    3,000  3,237,000 
Utilities — 0.5%       
Puerto Rico Electric Power Authority, RB, Series WW,       
 5.50%, 7/01/38    1,000  1,007,990 
Total Municipal Bonds in Puerto Rico      13,517,173 

See Notes to Financial Statements.

24 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Schedule of Investments (concluded)

BlackRock MuniYield New Jersey Fund, Inc. (MYJ)
(Percentages shown are based on Net Assets)

  Par   
Municipal Bonds  (000)  Value 
U.S. Virgin Islands — 1.7%     
Corporate — 1.7%     
United States Virgin Islands, Refunding RB,     
 Senior Secured, Hovensa Coker Project, AMT,     
 6.50%, 7/01/21  $ 3,500  $ 3,539,515 
Total Municipal Bonds in U.S. Virgin Islands    3,539,515 
Total Municipal Bonds – 139.6%    294,446,912 
Municipal Bonds Transferred to     
Tender Option Bond Trusts (f)     
New Jersey — 3.3%     
State — 3.3%     
Garden State Preservation Trust, RB, Election of 2005,     
 Series A (AGM), 5.75%, 11/01/28  5,460  6,870,045 
     New York — 1.8%     
Transportation — 1.8%     
Port Authority of New York & New Jersey, 152nd Series,     
 AMT, 5.25%, 11/01/35  3,764  3,808,655 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts — 5.1%    10,678,700 
Total Long-Term Investments     
(Cost — $299,607,692) — 144.7%    305,125,612 
Short-Term Securities  Shares   
CMA New Jersey Municipal Money Fund,     
 0.04% (g)(h)  11,913,783  11,913,783 
Total Short-Term Securities     
(Cost — $11,913,783) — 5.7%    11,913,783 
Total Investments (Cost — $311,521,475*) — 150.4%  317,039,395 
Other Assets Less Liabilities — 1.2%    2,623,657 
Liability for Trust Certificates, Including Interest     
   Expense and Fees Payable — (3.1)%    (6,609,020) 
Preferred Shares, at Redemption Value — (48.5)%    (102,207,702) 
Net Assets Applicable to Common Shares — 100.0%    $210,846,330 

* The cost and unrealized appreciation (depreciation) of investments as of
January 31, 2010, as computed for federal income tax purposes, were as follows:

Aggregate cost  $ 304,943,725 
Gross unrealized appreciation  $ 13,594,821 
Gross unrealized depreciation  (8,102,852) 
Net unrealized appreciation  $ 5,491,969 

(a) US government securities, held in escrow, are used to pay interest on this security as
well as to retire the bond in full at the date indicated, typically at a premium
to par.

(b) Represents a step-up bond that pays an initial coupon rate for the first period and
then a higher coupon rate for the following periods. Rate shown is as of report date.
(c) Represents a zero-coupon bond. Rate shown reflects the current yield as of
report date.
(d) Issuer filed for bankruptcy and/or is in default of interest payments.
(e) Non-income producing security.
(f) Securities represent bonds transferred to a tender option bond trust in exchange for
which the Fund acquired residual interest certificates. These securities serve as col-
lateral in a financing transaction. See Note 1 of the Notes to Financial Statements
for details of municipal bonds transferred to tender option bond trusts.
(g) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Net   
Affiliate  Activity  Income 
CMA New Jersey Municipal Money Fund  $8,732,267  $1,031 

(h) Represents the current yield as of report date.
Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an indi-
cation of the risk associated with investing in those securities. For information about
the Fund’s policy regarding valuation of investments and other significant accounting
policies, please refer to Note 1 of the Notes to Financial Statements.
The following table summarizes the inputs used as of January 31, 2010 in deter-
mining the fair valuation of the Fund’s investments:

Valuation  Investments in 
Inputs  Securities 
  Assets 
Level 1 — Short-Term Securities  $ 11,913,783 
Level 2 — Long-Term Investments1  305,125,612 
Level 3   
Total  $ 317,039,395 
     1 See above Schedule of Investments for values in each sector.   

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

25


Statements of Assets and Liabilities           
BlackRock
  Muni New York  BlackRock  BlackRock    BlackRock 
  Intermediate  MuniYield  MuniYield  BlackRock  MuniYield 
  Duration  Arizona  California  MuniYield  New Jersey 
  Fund, Inc.  Fund, Inc.  Fund, Inc.  Investment Fund  Fund, Inc. 
January 31, 2010 (Unaudited)  (MNE)  (MZA)         (MYC)           (MYF)  (MYJ) 
     Assets           
Investments at value — unaffiliated1  $ 86,922,973  $ 97,053,018  $ 475,264,329  $ 303,237,107  $ 305,125,612 
Investments at value — affiliated2  641,113  2,403,565  10,038,152  1,223,002  11,913,783 
Interest receivable  985,275  737,680  6,332,612  4,196,647  2,861,494 
Investments sold receivable  190,000  1,422,318  6,877,872  4,551,894  904,537 
Prepaid expenses  13,324  20,276  39,833  27,338  28,541 
Other assets  170         
Total assets  88,752,855  101,636,857  498,552,798  313,235,988  320,833,967 
     Liabilities           
Income dividends payable — Common Shares  233,457  305,386  1,437,430  888,051  1,001,329 
Investment advisory fees payable  37,388  42,571  204,488  128,263  132,731 
Interest expense and fees payable  1,191  318  59,102  44,369  5,318 
Other affiliates payable  568  652  3,160  1,936  2,032 
Officer’s and Directors’ fees payable  186  91  461  280  315 
Investments purchased payable    390,816  13,514,350  10,039,419   
Other accrued expenses payable    18,997  63,267  53,662  34,509 
Total accrued liabilities  272,790  758,831  15,282,258  11,155,980  1,176,234 
     Other Liabilities           
Trust certificates3  375,000  1,500,000  74,379,365  56,022,374  6,603,701 
Total Liabilities  647,790  2,258,831  89,661,623  67,178,354  7,779,935 
     Preferred Shares at Redemption Value           
$25,000 per share liquidation preference, plus unpaid dividends4,5  29,632,983  38,803,971  105,961,278  59,478,235  102,207,702 
Net Assets Applicable to Common Shareholders  $ 58,472,082  $ 60,574,055  $ 302,929,897  $ 186,579,399  $ 210,846,330 
     Net Assets Applicable to Common Shareholders Consist of           
Paid-in capital6,7  $ 59,630,112  $ 60,532,046  $ 301,598,405  $ 188,893,413  $ 204,494,347 
Undistributed net investment income  714,683  798,482  4,185,738  2,891,622  3,497,602 
Accumulated net realized loss  (2,814,261)  (1,177,147)  (6,614,355)  (14,336,628)  (2,663,539) 
Net unrealized appreciation/depreciation  941,548  420,674  3,760,109  9,130,992  5,517,920 
Net Assets Applicable to Common Shareholders  $ 58,472,082  $ 60,574,055  $ 302,929,897  $ 186,579,399  $ 210,846,330 
Net asset value per Common Share  $ 13.90  $ 13.29  $ 14.23  $ 13.76  $ 14.84 
     1 Investments at cost — unaffiliated  $ 85,981,425  $ 96,632,344  $ 471,504,220  $ 294,106,115  $ 299,607,692 
     2 Investments at cost — affiliated  $ 641,113  $ 2,403,565  $ 10,038,152  $ 1,223,002  $ 11,913,783 
     3 Represents short-term floating rate certificates issued by tender option           
         bond trusts.           
     4 Preferred Shares outstanding:           
         Par value $0.05 per share        2,379  3,349 
         Par value $0.10 per share  1,185  1,552  4,238    739 
     5 Preferred Shares authorized  1,240  1,612  7,000  1 million  4,760 
     6 Common Shares outstanding, $0.10 par value  4,206,439  4,558,007  21,295,255  13,558,024  14,203,242 
     7 Common Shares authorized  200 million  200 million  200 million  unlimited  200 million 

See Notes to Financial Statements.

26 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Statements of Operations           
BlackRock
  Muni New York  BlackRock  BlackRock    BlackRock 
  Intermediate  MuniYield  MuniYield  BlackRock  MuniYield 
  Duration  Arizona  California  MuniYield  New Jersey 
  Fund, Inc.  Fund, Inc.  Fund, Inc.  Investment Fund  Fund, Inc. 
Six Months Ended January 31, 2010 (Unaudited)  (MNE)  (MZA)         (MYC)         (MYF)   (MYJ) 
     Investment Income           
Interest  $ 2,164,239  $ 2,519,521  $ 11,646,728  $ 7,562,990  $ 7,812,891 
Income — affiliated  119    1,349  6,758  1,031 
Total income  2,164,358  2,519,521  11,648,077  7,569,748  7,813,922 
     Expenses           
Investment advisory  241,443  249,906  1,207,911  746,157  795,302 
Commissions for Preferred Shares  22,481  26,877  78,710  45,470  74,805 
Professional  21,925  20,796  33,984  28,892  24,453 
Transfer agent  10,726  17,724  22,489  22,556  24,714 
Accounting services  9,397  13,507  75,544  45,969  33,990 
Printing  5,413  8,080  28,141  15,163  18,801 
Registration  4,581  892  4,549  4,647  4,502 
Custodian  4,174  3,829  11,598  8,274  8,631 
Officer and Directors  3,412  3,626  18,305  11,399  12,137 
Miscellaneous  24,282  24,454  39,867  31,814  40,913 
Total expenses excluding interest expense and fees  347,834  369,691  1,521,098  960,341  1,038,248 
Interest expense and fees1  2,369  5,990  250,552  211,284  24,119 
Total expenses  350,203  375,681  1,771,650  1,171,625  1,062,367 
Less fees waived by advisor  (22,798)  (2,619)  (11,467)  (3,608)  (9,010) 
Total expenses after fees waived  327,405  373,062  1,760,183  1,168,017  1,053,357 
Net investment income  1,836,953  2,146,459  9,887,894  6,401,731  6,760,565 
     Realized and Unrealized Gain (Loss)           
Net realized gain (loss) from:           
   Investments  255,112  (158,070)  (2,290,857)  2,467,693  (148,161) 
   Financial futures contracts  3,982  3,983  8,960  12,943  9,956 
  259,094  (154,087)  (2,281,897)  2,480,636  (138,205) 
Net change in unrealized appreciation/depreciation on investments  3,355,759  4,012,793  17,574,566  7,485,065  9,811,725 
Total realized and unrealized gain  3,614,853  3,858,706  15,292,669  9,965,701  9,673,520 
     Dividends to Preferred Shareholders From           
Net investment income  (220,581)  (134,826)  (351,252)  (171,218)  (319,612) 
Net Increase in Net Assets Applicable to           
   Common Shareholders Resulting from Operations  $ 5,231,225  $ 5,870,339  $ 24,829,311  $ 16,196,214  $ 16,114,473 
   1 Related to tender option bond trusts.           

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

27


Statements of Changes in Net Assets  BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE) 
  Six Months   
  Ended      
  January 31,  Year Ended 
  2010      July 31, 
Increase (Decrease) in Net Assets Applicable to Common Shareholders:  (Unaudited)           2009 
     Operations     
Net investment income  $ 1,836,953  $ 3,678,440 
Net realized gain (loss)  259,094  (2,160,349) 
Net change in unrealized appreciation/depreciation  3,355,759  (174,373) 
Dividends to Preferred Shareholders from net investment income  (220,581)  (835,785) 
Net increase in net assets applicable to Common Shareholders resulting from operations  5,231,225  507,933 
     Dividends to Common Shareholders From     
Net investment income  (1,400,744)  (2,696,327) 
     Net Assets Applicable to Common Shareholders     
Total increase (decrease) in net assets applicable to Common Shareholders  3,830,481  (2,188,394) 
Beginning of period  54,641,601  56,829,995 
End of period  $ 58,472,082  $ 54,641,601 
Undistributed net investment income  $ 714,683  $ 499,055 
  BlackRock MuniYield Arizona Fund, Inc. (MZA) 
  Six Months   
  Ended       
  January 31,  Year Ended 
  2010      July 31, 
Increase (Decrease) in Net Assets Applicable to Common Shareholders:  (Unaudited)           2009 
     Operations     
Net investment income  $ 2,146,459  $ 4,330,049 
Net realized loss  (154,087)  (502,704) 
Net change in unrealized appreciation/depreciation  4,012,793  (1,630,717) 
Dividends to Preferred Shareholders from net investment income  (134,826)  (856,443) 
Net increase in net assets applicable to Common Shareholders resulting from operations  5,870,339  1,340,185 
     Dividends to Common Shareholders From     
Net investment income  (1,831,371)  (3,202,649) 
     Capital Share Transactions     
Reinvestment of common dividends  86,106  93,565 
     Net Assets Applicable to Common Shareholders     
Total increase (decrease) in net assets applicable to Common Shareholders  4,125,074  (1,768,899) 
Beginning of period  56,448,981  58,217,880 
End of period  $ 60,574,055  $ 56,448,981 
Undistributed net investment income  $ 798,482  $ 618,220 

See Notes to Financial Statements.

28 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Statements of Changes in Net Assets  BlackRock MuniYield California Fund, Inc. (MYC) 
  Six Months   
  Ended      
  January 31,  Year Ended 
  2010       July 31, 
Increase (Decrease) in Net Assets Applicable to Common Shareholders:  (Unaudited)  2009 
     Operations     
Net investment income  $ 9,887,894  $ 19,437,721 
Net realized loss  (2,281,897)  (3,732,748) 
Net change in unrealized appreciation/depreciation  17,574,566  (3,452,968) 
Dividends to Preferred Shareholders from net investment income  (351,252)  (2,734,089) 
Net increase in net assets applicable to Common Shareholders resulting from operations  24,829,311  9,517,916 
     Dividends to Common Shareholders From     
Net investment income  (8,704,904)  (14,714,808) 
     Net Assets Applicable to Common Shareholders     
Total increase (decrease) in net assets applicable to Common Shareholders  16,124,407  (5,196,892) 
Beginning of period  286,805,490  292,002,382 
End of period  $302,929,897  $ 286,805,490 
Undistributed net investment income  $ 4,185,738  $ 3,354,000 
  BlackRock MuniYield Investment Fund (MYF) 
  Six Months   
  Ended      
  January 31,  Year Ended 
  2010          July 31, 
Increase (Decrease) in Net Assets Applicable to Common Shareholders:  (Unaudited)  2009 
     Operations     
Net investment income  $ 6,401,731  $ 12,962,890 
Net realized gain (loss)  2,480,636  (12,407,592) 
Net change in unrealized appreciation/depreciation  7,485,065  2,135,373 
Dividends to Preferred Shareholders from net investment income  (171,218)  (1,840,008) 
Net increase in net assets applicable to Common Shareholders resulting from operations  16,196,214  850,663 
     Dividends to Common Shareholders From     
Net investment income  (5,226,618)  (9,555,926) 
     Net Assets Applicable to Common Shareholders     
Total increase (decrease) in net assets applicable to Common Shareholders  10,969,596  (8,705,263) 
Beginning of period  175,609,803  184,315,066 
End of period  $186,579,399  $ 175,609,803 
Undistributed net investment income  $ 2,891,622  $ 1,887,727 

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

29


Statements of Changes in Net Assets  BlackRock MuniYield New Jersey Fund, Inc. (MYJ) 
  Six Months   
  Ended      
  January 31,  Year Ended 
  2010           July 31, 
Increase (Decrease) in Net Assets Applicable to Common Shareholders:  (Unaudited)        2009 
     Operations     
Net investment income  $ 6,760,565  $ 13,853,962 
Net realized loss  (138,205)  (1,310,444) 
Net change in unrealized appreciation/depreciation  9,811,725  (3,427,395) 
Dividends to Preferred Shareholders from net investment income  (319,612)  (2,158,107) 
Net increase in net assets applicable to Common Shareholders resulting from operations  16,114,473  6,958,016 
     Dividends to Common Shareholders From     
Net investment income  (6,007,971)  (10,240,537) 
     Net Assets Applicable to Common Shareholders     
Total increase (decrease) in net assets applicable to Common Shareholders  10,106,502  (3,282,521) 
Beginning of period  200,739,828  204,022,349 
End of period  $210,846,330  $ 200,739,828 
Undistributed net investment income  $ 3,497,602  $ 3,064,620 

See Notes to Financial Statements.

30 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Statements of Cash Flows     
  BlackRock   
  MuniYield  BlackRock 
  California  MuniYield 
  Fund Inc.  Investment Fund 
Six Months Ended January 31, 2010 (Unaudited)  (MYC)         (MYF) 
     Cash Provided by (Used for) Operating Activities     
Net increase in net assets resulting from operations, excluding dividends to Preferred Shareholders  $ 25,180,563  $ 16,026,996 
Adjustments to reconcile net increase in net assets resulting from operations to net cash provided by (used for) operating activities:     
   (Increase) decrease in interest receivable  378,666  (225,330) 
   Increase (decrease) in investment advisory fees payable  (2,074)  703 
   Decrease in interest expense and fees payable  (170,976)  (30,436) 
   Decrease in Officer’s and Directors’ fees payable    (109) 
   Increase in other affiliates payable  395  154 
   Decrease in other accrued expenses payable  (6,810)  (4,641) 
Net realized and unrealized gain on investments  (15,126,478)  (10,089,091) 
Amortization of premium and discount on investments  261,003  218,830 
Proceeds from sales of long-term investments  139,911,919  77,921,648 
Purchases of long-term investments  (139,016,014)  (86,125,766) 
Net (purchases) sales of short-term securities  (2,430,456)  2,177,048 
Net cash provided by (used for) operating activities  8,979,738  (129,994) 
     Cash Used for Financing Activities     
Cash receipts from trust certificates  1,643  10,814,794 
Cash payments for trust certificates  (4,998)  (5,590,000) 
Cash dividends paid to Common Shareholders  (8,704,904)  (5,124,932) 
Cash dividends paid to Preferred Shareholders  (358,000)  (172,725) 
Cash used for financing activities  (9,066,259)  (72,863) 
     Cash     
Net decrease in cash  (86,521)  (202,857) 
Cash at beginning of period  86,521  202,857 
Cash at end of period     
     Cash Flow Information     
Cash paid during the period for interest  $ 421,528  $ 241,720 

A Statement of Cash Flows is presented when a Fund had a significant amount of borrowing during the period, based on the average borrowing outstanding in relation to average
total assets.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

31


Financial Highlights        BlackRock Muni New York Intermediate Duration Fund, Inc. (MNE) 
  Six Months    Period         
    Ended    June 1,         
  January 31,  Year Ended  2008         
    2010  July 31,  to July 31,    Year Ended May 31,   
  (Unaudited)  2009  2008  2008  2007  2006  2005 
     Per Share Operating Performance                 
Net asset value, beginning of period  $ 12.99  $ 13.51  $ 14.05  $ 14.91  $ 14.66  $ 15.05  $ 14.45 
Net investment income1    0.44  0.87  0.14  0.91  0.90  0.87  0.85 
Net realized and unrealized gain (loss)    0.85  (0.55)  (0.53)  (0.86)  0.24  (0.37)  0.58 
Dividends to Preferred Shareholders                 
   from net investment income    (0.05)  (0.20)  (0.04)  (0.27)  (0.25)  (0.20)  (0.11) 
Net increase (decrease) from investment operations    1.24  0.12  (0.43)  (0.22)  0.89  0.30  1.32 
Dividends to Common Shareholders                 
   from net investment income    (0.33)  (0.64)  (0.11)  (0.64)  (0.64)  (0.69)  (0.72) 
Net asset value, end of period  $ 13.90  $ 12.99  $ 13.51  $ 14.05  $ 14.91  $ 14.66  $ 15.05 
Market price, end of period  $ 12.43  $ 11.60  $ 12.12  $ 12.81  $ 13.93  $ 13.03  $ 13.44 
     Total Investment Return2                 
Based on net asset value    9.91%3  2.26%  (3.01)%3  (1.10)%  6.57%  2.52%  9.99% 
Based on market price  10.07%3  1.79%  (4.56)%3  (3.48)%  12.02%  2.03%  10.97% 
     Ratios to Average Net Assets Applicable to Common Shareholders               
Total expenses4    1.22%5  1.33%  1.39%6  1.28%  1.31%  1.33%  1.38% 
Total expenses after fees waived and paid indirectly4    1.14%5  1.15%  1.15%6  1.04%  1.08%  1.10%  1.15% 
Total expenses after fees waived and paid indirectly and                 
     excluding interest expense and fees4,7    1.13%5  1.11%  1.11%6  1.04%  1.08%  1.10%  1.15% 
Net investment income4    6.37%5  7.01%  6.36%6  6.31%  6.01%  5.89%  5.75% 
Dividends to Preferred Shareholders    0.76%5  1.59%  1.84%6  1.89%  1.66%  1.32%  0.77% 
Net investment income to Common Shareholders    5.61%5  5.42%  4.52%6  4.42%  4.35%  4.57%  4.98% 
     Supplemental Data                 
Net assets applicable to Common Shareholders,                 
   end of period (000)  $ 58,472  $ 54,642  $ 56,830  $ 59,101  $ 62,701  $ 61,672  $ 63,290 
Preferred Shares outstanding at $25,000                 
   liquidation preference, end of period (000)  $ 29,625  $ 29,625  $ 29,625  $ 31,000  $ 31,000  $ 31,000  $ 31,000 
Portfolio turnover    8%  32%  2%  21%  29%  49%  17% 
Asset coverage, end of period per $1,000  $ 2,9748  $ 2,8448  $ 2,9188  $ 2,9068  $ 3,0238  $ 2,989  $ 3,042 

1 Based on average shares outstanding.
2 Total investment returns based on market value, which can be significantly greater or lesser than the net asset value, may result in substantially different returns. Where applicable,
total investment returns exclude the effects of sales charges and include the reinvestment of dividends and distributions.
3 Aggregate total investment return.
4 Do not reflect the effect of dividends to Preferred Shareholders.
5 Annualized.
6 Annualized. Certain non-recurring expenses have been included in the ratio but not annualized. If these expenses were annualized, the ratio of the total expenses, total expenses after
fees waived and paid indirectly, total expenses after fees waived and fees paid indirectly and excluding interest expense and fees, net investment income and net investment income to
Common Shareholders would have been 1.79%, 1.55%, 1.50%, 5.96% and 4.12%, respectively.
7 Interest expense and fees relate to tender option bond trusts. See Note 1 of the Notes to Financial Statements for details of municipal bonds transferred to tender option bond trusts.
8 Asset coverage per Preferred Share at $25,000 liquidation preference for the periods ended January 2010, July 2009, July 2008, May 2008 and May 2007 are $74,350,
$71,119, $72,970, $72,676 and $75,573, respectively.

See Notes to Financial Statements.

32 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Financial Highlights          BlackRock MuniYield Arizona Fund, Inc. (MZA) 
  Six Months    Period         
    Ended    November 1,         
  January 31,  Year Ended  2007         
    2010  July 31,  to July 31,    Year Ended October 31,   
  (Unaudited)  2009  2008  2007  2006  2005  2004 
     Per Share Operating Performance                 
Net asset value, beginning of period  $ 12.40  $ 12.81  $ 13.96  $ 14.53  $ 14.39  $ 15.04  $ 14.64 
Net investment income1    0.47  0.95  0.72  0.95  0.98  0.97  0.98 
Net realized and unrealized gain (loss)    0.85  (0.47)  (1.00)  (0.46)  0.36  (0.49)  0.40 
Dividends and distributions to Preferred Shareholders from:                 
     Net investment income    (0.03)  (0.19)  (0.19)  (0.29)  (0.26)  (0.14)  (0.06) 
     Net realized gain        (0.05)  (0.02)  (0.02)           (0.00)2   
Net increase (decrease) from investment operations    1.29  0.29  (0.52)  0.18  1.06  0.34  1.32 
Dividends and distributions to Common Shareholders from:                 
     Net investment income    (0.40)  (0.70)  (0.51)  (0.69)  (0.80)  (0.92)  (0.92) 
     Net realized gain        (0.12)  (0.06)  (0.12)  (0.02)   
Total dividends and distributions to Common Shareholders    (0.40)  (0.70)  (0.63)  (0.75)  (0.92)  (0.94)  (0.92) 
Capital charges with respect to issuance of Preferred Shares            0.003  (0.05)   
Net asset value, end of period  $ 13.29  $ 12.40  $ 12.81  $ 13.96  $ 14.53  $ 14.39  $ 15.04 
Market price, end of period  $ 12.78  $ 12.85  $ 13.94  $ 13.66  $ 14.79  $ 16.03  $ 15.10 
     Total Investment Return4                 
Based on net asset value  10.51%5  3.27%  (3.79)%5  1.29%  7.47%  1.91%  9.40% 
Based on market price    2.55%5  (1.66)%  6.99%5  (2.63)%  (1.80)%  13.07%  13.80% 
     Ratios to Average Net Assets Applicable to Common Shareholders               
Total expenses6    1.26%7  1.46%  1.61%7  1.76%  1.71%  1.52%  1.40% 
Total expenses after fees waived and paid indirectly6    1.25%7  1.42%  1.59%7  1.75%  1.70%  1.51%  1.39% 
Total expenses after fees waived and paid indirectly and                 
     excluding interest expense and fees6,8    1.23%7  1.36%  1.40%7  1.37%  1.33%  1.20%  1.19% 
Net investment income6    7.18%7  8.16%  7.19%7  6.65%  6.90%  6.54%  6.65% 
Dividends to Preferred Shareholders    0.45%7  1.61%  1.94%7  2.04%  1.83%  0.91%  0.42% 
Net investment income to Common Shareholders    6.73%7  6.55%  5.25%7  4.61%  5.07%  5.63%  6.23% 
     Supplemental Data                 
Net assets applicable to Common Shareholders,                 
     end of period (000)  $ 60,574  $ 56,449  $ 58,218  $ 63,228  $ 65,611  $ 64,630  $ 67,217 
Preferred Shares outstanding at $25,000                 
     liquidation preference, end of period (000)  $ 38,800  $ 38,800  $ 40,300  $ 40,300  $ 40,300  $ 40,300  $ 30,300 
Portfolio turnover    6%  39%  13%  31%  31%  28%  21% 
Asset coverage per Preferred Share at $25,000                 
   liquidation preference, end of period  $ 64,032  $ 61,375  $ 61,1229  $ 64,2329  $ 65,7089  $ 65,0989  $ 80,4649 

1 Based on average shares outstanding.
2 Amount is less than $(0.01) per share.
3 Amount is less than $0.01 per share.
4 Total investment returns based on market value, which can be significantly greater or lesser than the net asset value, may result in substantially different returns. Where applicable,
total investment returns exclude the effects of sales charges and include the reinvestment of dividends and distributions.
5 Aggregate total investment return.
6 Do not reflect the effect of dividends to Preferred Shareholders.
7 Annualized.
8 Interest expense and fees relate to tender option bond trusts. See Note 1 of the Notes to Financial Statements for details of municipal bonds transferred to tender option bond trusts.
9 Amounts have been recalculated to conform with current period presentation.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

JANUARY 31, 2010

33


Financial Highlights          BlackRock MuniYield California Fund, Inc. (MYC) 
  Six Months    Period         
    Ended    November 1,         
  January 31,  Year Ended  2007         
    2010  July 31,  to July 31,    Year Ended October 31,   
  (Unaudited)  2009  2008  2007  2006  2005  2004 
     Per Share Operating Performance                 
Net asset value, beginning of period  $ 13.47  $ 13.71  $ 14.60  $ 15.11  $ 14.73  $ 15.27  $ 15.17 
Net investment income1    0.46  0.91  0.69  0.93  0.96  0.93  1.02 
Net realized and unrealized gain (loss)    0.73  (0.33)  (0.88)  (0.49)  0.37  (0.46)  0.12 
Dividends to Preferred Shareholders                 
   from net investment income    (0.02)  (0.13)  (0.20)  (0.29)  (0.25)  (0.13)  (0.07) 
Net increase (decrease) from investment operations    1.17  0.45  (0.39)  0.15  1.08  0.34  1.07 
Dividends to Common Shareholders                 
   from net investment income    (0.41)  (0.69)  (0.50)  (0.66)  (0.70)  (0.86)  (0.97) 
Capital charges with respect to issuance                 
   of Preferred Shares            0.002  (0.02)   
Net asset value, end of period  $ 14.23  $ 13.47  $ 13.71  $ 14.60  $ 15.11  $ 14.73  $ 15.27 
Market price, end of period  $ 12.75  $ 12.44  $ 13.07  $ 13.25  $ 14.00  $ 13.37  $ 14.43 
     Total Investment Return3                 
Based on net asset value    8.98%4  4.64%  (2.55)%4  1.36%  8.03%  2.59%  7.74% 
Based on market price    5.73%4  1.37%  2.37%4  (0.72)%  10.28%  (1.46)%  9.16% 
     Ratios to Average Net Assets Applicable to Common Shareholders               
Total expenses5    1.17%6  1.49%  1.49%6  1.77%  1.52%  1.13%  1.12% 
Total expenses after fees waived5    1.16%6  1.47%  1.45%6  1.75%  1.51%  1.13%  1.12% 
Total expenses after fees waived and                 
   excluding interest expense and fees5,7    1.00%6  1.08%  1.06%6  1.06%  1.06%  0.98%  0.96% 
Net investment income5    6.52%6  7.07%  6.24%6  6.29%  6.51%  6.16%  6.79% 
Dividends to Preferred Shareholders    0.23%6  0.99%  1.83%6  1.93%  1.70%  0.84%  0.44% 
Net investment income to Common Shareholders    6.29%6  6.08%  4.41%6  4.36%  4.81%  5.32%  6.35% 
     Supplemental Data                 
Net assets applicable to Common Shareholders,                 
   end of period (000)  $ 302,930  $ 286,805  $ 292,002  $ 310,934  $ 321,701  $ 313,708  $ 325,204 
Preferred Shares outstanding at $25,000                 
   liquidation preference, end of period (000)  $ 105,950  $ 105,950  $ 126,500  $ 175,000  $ 175,000  $ 175,000  $ 140,000 
Portfolio turnover    30%  38%  30%  41%  39%  53%  29% 
Asset coverage per Preferred Share at $25,000                 
   liquidation preference, end of period  $ 96,482  $ 92,679  $ 82,7248  $ 69,4528  $ 70,9858  $ 69,8188  $ 83,0728 

1 Based on average shares outstanding.
2 Amount is less than $0.01 per share.
3 Total investment returns based on market value, which can be significantly greater or lesser than the net asset value, may result in substantially different returns. Where applicable,
total investment returns exclude the effects of sales charges and include the reinvestment of dividends and distributions.
4 Aggregate total investment return.
5 Do not reflect the effect of dividends to Preferred Shareholders.
6 Annualized.
7 Interest expense and fees relate to tender option bond trusts. See Note 1 of the Notes to Financial Statements for details of municipal bonds transferred to tender option bond trusts.
8 Amounts have been recalculated to conform with current period presentation.

See Notes to Financial Statements.

34 SEMI-ANNUAL REPORT

JANUARY 31, 2010


Financial Highlights          BlackRock MuniYield Investment Fund (MYF) 
  Six Months    Period         
    Ended    November 1,         
  January 31,  Year Ended  2007         
    2010  July 31,  to July 31,    Year Ended October 31,   
  (Unaudited)  2009  2008  2007  2006  2005  2004 
     Per Share Operating Performance                 
Net asset value, beginning of period  $ 12.95  $ 13.59  $ 14.53  $ 15.11  $ 14.91  $ 15.27  $ 14.97 
Net investment income1    0.47  0.96  0.73  0.99  0.99  0.98  1.00 
Net realized and unrealized gain (loss)    0.74  (0.77)  (0.94)  (0.57)  0.28  (0.26)  0.29 
Dividends to Preferred Shareholders                 
   from net investment income    (0.01)  (0.13)  (0.21)  (0.30)  (0.26)  (0.14)  (0.07) 
Net increase (decrease) from investment operations    1.20  0.06  (0.42)  0.12  1.01  0.58  1.22 
Dividends to Common Shareholders                 
   from net investment income    (0.39)  (0.70)  (0.52)  (0.70)  (0.81)  (0.92)  (0.92) 
Capital charges with respect to issuance of Preferred Shares                     (0.00)2  (0.02)   
Net asset value, end of period  $ 13.76  $ 12.95  $ 13.59