UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY Investment Company Act file number: 811-05597 Morgan Stanley Municipal Income Opportunities Trust (Exact name of registrant as specified in charter) 1221 Avenue of the Americas, New York, New York 10020 (Address of principal executive offices) (Zip code) Ronald E. Robison 1221 Avenue of the Americas, New York, New York 10020 (Name and address of agent for service) Registrant's telephone number, including area code: 212-762-4000 Date of fiscal year end: May 31, 2005 Date of reporting period: August 31, 2004 ITEM 1. SCHEDULE OF INVESTMENTS. The Fund's schedule of investments as of the close of the reporting period prepared pursuant to Rule 12-12 of Regulation S-X is as follows: MORGAN STANLEY MUNICIPAL INCOME OPPORTUNITIES TRUST PORTFOLIO OF INVESTMENTS AUGUST 31, 2004 (unaudited) PRINCIPAL AMOUNT IN COUPON MATURITY THOUSANDS RATE DATE VALUE --------- ------ -------- ----- TAX-EXEMPT MUNICIPAL BONDS (97.1%) General Obligation (1.3%) $1,000 California, Various Purposes Dtd 02/01/04 5.00% 02/01/33 $ 1,007,800 1,000 Southlands, Colorado, Medical District #1 7.125 12/01/34 998,610 ----- ------------ 2,000 2,006,410 ----- ------------ Educational Facilities Revenue (1.8%) 1,200 ABAG Finance Authority for Nonprofit Corporations, California, 7.50 05/01/11 1,276,332 National Center for International Schools COPs 500 San Diego County, California, The Burnham Institute COPs 6.25 09/01/29 517,025 1,000 Westchester County Industrial Development Agency, New York, 5.375 08/01/24 1,021,150 ----- Guiding Eyes For The Blind ------------ 2,700 2,814,507 ----- ------------ Hospital Revenue (15.9%) 1,000 Colbert County-Northwest Health Care Authority, Alabama, Helen 5.75 06/01/27 960,820 Keller Hospital Ser 2003 2,000 Baxter County, Arkansas, Baxter County Regional Hospital Impr & 5.625 09/01/28 2,016,700 Refg Ser 1999 B 2,000 Hawaii Department of Budget & Finance, Kuakini Health 2002 Ser A 6.375 07/01/32 2,056,820 1,000 Illinois Health Facilities Authority, Riverside Health Ser 2000 6.85 11/15/29 1,218,610 1,000 Indiana Health Facility Financing Authority, Riverview Hospital Ser 6.125 08/01/31 1,033,920 2002 2,000 Maryland Health & Higher Educational Facilities Authority, 6.75 07/01/30 2,257,060 University of Maryland Medical Center Ser 2000 1,000 St Louis County Industrial Development Authority, Missouri, 6.625 11/15/35 1,013,820 Pediatric Rehabilitation Center Ser 2003 A 3,000 Henderson, Nevada, Catholic Health West 1998 Ser A 5.375 07/01/26 2,904,299 1,500 New Hampshire Higher Educational & Health Facilities Authority, 6.00 05/01/28 1,331,535 Littleton Hospital Assn Ser 1998 A 2,000 New Jersey Health Care Facilities Financing Authority, Raritan Bay 7.25 07/01/27 2,091,500 Medical Center Ser 1994 1,230 Nassau County Industrial Development Agency, New York, North 5.875 11/01/11 1,356,850 Shore Health Ser B 1,000 Monroe County Hospital Authority, Pennsylvania, Pocono Medical 6.00 01/01/43 1,022,480 Center Ser 2003 1,750 Philadelphia Hospitals & Higher Education Facilities Authority, 6.375 11/15/11 1,753,570 Pennsylvania, Chestnut Hill Hospital Ser 1992 2,000 South Carolina Jobs - Economic Development Authority, Palmetto 6.875 08/01/27 2,186,340 Health Alliance Refg & Impr Ser 2003 C 1,000 Knox County Health, Educational & Housing Facility Board, 6.50 04/15/31 958,490 Tennessee, Baptist Health of East Tennessee Ser 2002 1,000 Decatur Hospital Authority, Texas, Wise Regal Health Ser Ser A 7.125 09/01/34 994,600 ----- ------------ 24,480 25,157,414 ------ ------------ Industrial Development/Pollution Control Revenue (14.0%) 2,000 Los Angeles, California, American Airlines Inc Terminal 4 Ser 2002 7.50 12/01/24 1,724,960 C (AMT) 360 Metropolitan Washington Airports Authority, District of Columbia & 10.125 09/01/11 360,450 Virginia, CaterAir International Corp Ser 1991 (AMT) + 2,000 Chicago, Illinois, Chicago O'Hare Int'l Airport/United Airlines Inc Refg 6.30 05/01/16 370,000 Ser 2001 C (a) 1,500 Iowa Finance Authority, IPSCO Inc Ser 1997 (AMT) 6.00 06/01/27 1,477,890 1,500 Dayton, Ohio, Emery Air Freight Corp Refg Ser 1998 A 5.625 02/01/18 1,390,290 505 Zanesville-Muskingum County Port Authority, Ohio, Anchor Glass 10.25 12/01/08 504,939 Container Corp Ser 1989 B (AMT) 2,000 Beaver County Industrial Development Authority, Pennsylvania, 7.75 05/01/20 2,144,220 Toledo Edison Co Collateralized Ser 1995 B 3,330 Carbon County Industrial Development Authority, Pennsylvania, 6.65 05/01/10 3,603,560 Panther Creek Partners Refg 2000 Ser (AMT) 2,125 Lexington County, South Carolina, Ellett Brothers Inc Refg Ser 1988 7.50 09/01/08 2,075,551 1,000 Brazos River Authority, Texas, TXU Electric Co Refg Ser 1999 A 7.70 04/01/33 1,169,060 (AMT) 1,000 Chesterfield County Industrial Development Authority, Virginia, 5.50 10/01/09 1,071,380 Virginia Electric & Power Company Ser 1985 4,000 Pittsylvania County Industrial Development Authority, Virginia, 7.45 01/01/09 4,114,920 Multi-Trade Pittsylvania County Ser 1994 A (AMT) 2,000 Upshur County, West Virginia, TJ International Inc Ser 1995 (AMT) 7.00 07/15/25 2,102,500 ----- ------------ 23,320 22,109,720 ------ ------------ Mortgage Revenue - Multi-Family (6.9%) Washington County Housing & Redevelopment Authority, 3,885 Courtly Park Ser 1989 A 9.75 06/15/19 3,039,041 1,165 Courtly Park Ser 1989 A (AMT) 10.25 06/15/19 911,578 24,080 Courtly Park Ser 1989 B 0.00 06/15/19 361,200 8,678 Courtly Park Ser 1989 B (AMT) 0.00 06/15/19 130,168 White Bear Lake, Minnesota, 3,715 White Bear Woods Apts Phase II Refg 1989 Ser A 9.75 06/15/19 3,229,561 19,771 White Bear Woods Apts Phase II Refg 1989 Ser B 0.00 06/15/19 296,571 3,000 Brookhaven Industrial Development Agency, New York, Woodcrest 6.375 12/01/37 2,975,040 ----- Estates Ser 1998 A (AMT) ------------ 64,294 10,943,159 ------ ------------ Mortgage Revenue - Single Family (7.0%) Colorado Housing & Finance Authority, 215 1996 Ser B (AMT) 7.65 11/01/26 216,948 1,015 Ser 1998 D-2 (AMT) 6.35 11/01/29 1,023,425 28,585 New Hampshire Housing Finance Authority, Residential 1983 Ser B 0.00 01/01/15 9,865,255 ------ ------------ 29,815 11,105,628 ------ ------------ Nursing & Health Related Facilities Revenue (10.8%) Escambia County, Florida, 5,470 Pensacola Care Development Centers Ser 1989 10.25 07/01/11 5,504,789 1,255 Pensacola Care Development Centers Ser 1989 A 10.25 07/01/11 1,262,982 1,000 Orange County Health Facilities Authority, Florida, Westminister 6.75 04/01/34 862,000 Community Care Services Inc Ser 1999 1,000 Pinellas County Health Facilities Authority, Florida, Oaks of 6.25 06/01/34 1,003,220 Clearwater Ser 2004 1,965 Iowa Health Facilities Development Financing Authority, Care 9.25 07/01/25 2,352,871 Initiatives Ser 1996 1,205 Kentucky Economic Development Financing Authority, 6.50# 01/01/29 1,176,128 AHF/Kentucky-Iowa Inc Ser 2003 1,200 Westside Habilitation Center, Louisiana, Intermediate Care Facility 8.375 10/01/13 1,222,056 for the Mentally Retarded Refg Ser 1993 1,850 Massachusetts Development Finance Agency, New England 5.875 11/01/18 1,850,037 Center for Children Ser 1998 1,000 Massachusetts Health & Educational Facilities Authority, The 6.125 07/01/29 975,380 Learning Center for Deaf Children Ser C 870 Mount Vernon Industrial Development Agency, New York, 6.00 06/01/09 872,036 --- Meadowview at the Wartburg Ser 1999 ------------ 16,815 17,081,499 ------ ------------ Recreational Facilities Revenue (6.9%) 2,000 Sacramento Financing Authority, California, Convention Center 6.25 01/01/30 2,017,460 Hotel 1999 Ser A 1,000 San Diego County, San Diego Natural History Museum COPs 5.70 02/01/28 905,490 2,000 Mohegan Tribe of Indians, Connecticut, Gaming Authority Ser 2003 5.25 01/01/33 1,965,680 Mashantucket (Western) Pequot Tribe, Connecticut, 1,010 1996 Ser A (b) 6.40 09/01/11 1,083,417 1,000 1997 Ser B (b) 5.75 09/01/27 1,026,820 2,000 St Louis Industrial Development Authority, Missouri, St Louis 6.875 12/15/20 1,731,600 Convention Center Headquarters Hotel Ser 2000 (AMT) 2,000 Austin Convention Enterprises, Texas, Convention Center Hotel Ser 6.70 01/01/32 2,105,420 ----- 2000 A ------------ 11,010 10,835,887 ------ ------------ Retirement & Life Care Facilities Revenue (14.5%) 1,000 St Johns County Industrial Development Authority, Florida, 8.00 01/01/30 955,110 Glenmoor Ser 1999 A 1,000 Hawaii Department of Budget & Finance, Kahala Nui, 2003 Ser A 8.00 11/15/33 1,011,450 1,500 Lenexa, Kansas, Lakeview Village - Southridge Ser 2002 C 6.875 05/15/32 1,584,690 1,500 Maryland Health & Higher Educational Facilities Authority, Mercy 6.00 04/01/35 1,521,945 Ridge 2003 Ser A 1,500 Massachusetts Development Finance Agency, Loomis 5.75 07/01/23 1,384,305 Communities Ser 1999 A 1,500 Kansas City, Missouri, Industrial Development Agency, Bishop 6.50 01/01/35 1,512,390 Spencer 2004 Ser A New Jersey Economic Development Authority, 1,000 Cedar Crest Villiage Inc Ser 2001 A 7.25 11/15/31 1,021,500 1,000 Franciscan Oaks Ser 1997 5.70 10/01/17 962,760 1,000 The Presbyterian Home at Montgomery Ser 2001 A 6.375 11/01/31 1,015,000 2,000 United Methodist Homes of New Jersey Ser 1998 5.125 07/01/25 1,771,580 3,250 Suffolk County Industrial Development Agency, New York, 7.25 11/01/28 3,389,360 Jefferson's Ferry Ser 1999 1,000 North Carolina Medical Care Commission, The Given Estate Project, 6.50 07/01/32 1,017,980 Ser 2003 A 1,000 Chester County Health & Education Facilities Authority, 7.625 07/01/34 1,013,210 Pennsylvania, Jenner's Pond Inc Ser 2002 750 Shelby County Health, Educational & Housing Facilities Board, 7.25 12/01/34 772,883 Tennessee, Village at Germantown Ser 2003 A 1,000 Houston, Health Facilities Authority, Texas, Buckingham Senior 7.125 02/15/34 1,032,360 Living Community Ser 2003 A 2,100 Vermont Economic Development Authority, Wake Robin Corp Ser 6.75 03/01/29 2,046,093 1999 A 1,000 Peninsula Ports Authorty of Virginia, Virginia Baptist Homes Ser 7.375 12/01/32 1,047,940 ----- 2003 A ------------ 23,100 23,060,556 ------ ------------ Tax Allocation Revenue (10.6%) 1,000 San Marcos, California, Special Tax Community Facilities District # 02-01 5.95 09/01/35 1,016,200 2,000 Elk Valley Public Improvement Corporation, Colorado Ser 2001 A 7.35 09/01/31 2,094,000 2,000 Beacon Lakes, Community Development District, Florida, Ser 2003 A 6.90 05/01/35 2,096,720 1,000 Midtown Miami FL 6.25 05/01/37 1,024,300 2,000 Chicago, Illinois, Lake Shore East, Ser 2002 6.75 12/01/32 2,073,060 2,000 Des Peres, Missouri, West County Center Ser 2002 5.75 04/15/20 2,051,280 4,000 Fenton, Missouri, Gravois Bluffs Redevelopment Ser 2001 A Refg 7.00 10/01/21 4,329,840 1,995 Las Vegas District No 808, Nevada, Summerlin Area Ser 2001 6.75 06/01/21 2,060,017 ----- ------------ 15,995 16,745,417 ------ ------------ Transportation Facilities Revenue (3.8%) 5,000 E-470 Public Highway Authority, Colorado, Ser 1997 B (MBIA) 0.00 09/01/15 3,107,800 1,780 Mid-Bay Bridge Authority, Florida, Sr Lien Crossover Refg Ser 5.85 10/01/13 1,971,083 1993 A (Ambac) 1,000 Nevada Department of Business & Industry, Las Vegas Monorail 7.375 01/01/40 981,380 ----- 2nd Tier Ser 2000 ------------ 7,780 6,060,263 ----- ------------ Refunded (3.6%) 2,000 Anne Arundel County, Maryland, National Business Park Ser 2000 7.375 07/01/28++ 2,491,720 3,000 Massachusetts Health & Educational Facilities Authority, Dana 6.25 12/01/22+ 3,234,930 ----- Farber Cancer Institute Ser G-1 ------------ 5,000 5,726,650 ----- ------------ 226,309 TOTAL TAX-EXEMPT MUNICIPAL BONDS (COST $162,745,434) 153,647,110 ------- ------------ SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (2.0%) 3,000 Harris County Health Facilities Development Corporation, Texas, 1.35* 12/01/32 3,000,000 Methodist Hospital Ser 2002 (Demand 08/02/04) 115 Washington Health Care Facilities Authority, Virginia, Mason 1.26* 02/15/27 115,000 --- ------------ Medical Center Ser 1997 B (MBIA) (Demand 08/02/04) 3,115 TOTAL SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (COST $3,115,000) 3,115,000 ----- ------------ $229,424 TOTAL INVESTMENTS (COST $165,860,434) (C) 99.1% 156,762,110 ======== OTHER ASSETS IN EXCESS OF LIABILITIES 0.9 1,344,718 --- ------------ NET ASSETS 100.0% $158,106,828 ===== ============ ---------- AMT Alternative Minimum Tax. COPs Certificates of Participation. * Current coupon of variable rate demand obligation. + Joint exemption in locations shown. ++ Prerefunded to call date shown. # Currently a 6.50% coupon; increases to 8.00% on January 1, 2009. (a) Issuer in bankruptcy; non-income producing security. (b) Resale is restricted to qualified institutional investors. (c) The aggregate cost for federal income tax purposes approximates the aggregate cost for book purposes. The aggregate gross unrealized appreciation is $6,210,885 and the aggregate gross unrealized depreciation is $15,441,664 , resulting in net unrealized depreciation of $9,230,779 . Bond Insurance: --------------- Ambac Ambac Assurance Corporation. MBIA Municipal Bond Investors Assurance Corporation. SEE NOTES TO FINANCIAL STATEMENTS MORGAN STANLEY MUNICIPAL INCOME OPPORTUNITIES TRUST GEOGRAPHIC SUMMARY OF INVESTMENTS AUGUST 31, 2004 (UNAUDITED) Alabama 0.6 % Arkansas 1.3 California 5.5 Colorado 4.7 Connecticut 2.6 Dist of Columbia 0.2 Florida 9.3 Hawaii 1.9 Illinois 2.3 Indiana 0.7 Iowa 2.4 Kansas 1.0 Kentucky 0.7 Louisianna 0.8 Maryland 4.0 Massachusetts 4.6 Minnesota 5.0 Missouri 6.8 Nevada 3.7 New Hampshire 7.0 New Jersey 4.2 New York 6.1 North Carolina 0.6 Ohio 1.2 Pennsylvania 6.1 South Carolina 2.7 Tennessee 1.1 Texas 5.2 Vermont 1.3 Virginia 4.1 Washington 0.1 West Virginia 1.3 --- Total 99.1% ----- ITEM 2. CONTROLS AND PROCEDURES. (a) The Fund's principal executive officer and principal financial officer have concluded that the Fund's disclosure controls and procedures are sufficient to ensure that information required to be disclosed by the Fund in this Form N-Q was recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, based upon such officers' evaluation of these controls and procedures as of a date within 90 days of the filing date of the report. (b) There were no changes in the Fund's internal control over financial reporting that occurred during the registrant's fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Fund's internal control over financial reporting. ITEM 3. EXHIBITS. (a) A separate certification for each principal executive officer and principal financial officer of the registrant are attached hereto. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Morgan Stanley Municipal Income Opportunities Trust /s/ Ronald E. Robison Ronald E. Robison Principal Executive Officer October 20, 2004 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated. /s/ Ronald E. Robison Ronald E. Robison Principal Executive Officer October 20, 2004 /s/ Francis Smith Francis Smith Principal Financial Officer October 20, 2004 3