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: February 28, 2005 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-February 28, 2005 (unaudited) PRINCIPAL AMOUNT IN COUPON MATURITY THOUSANDS RATE DATE VALUE --------- ------ -------- ------------ TAX-EXEMPT MUNICIPAL BONDS (97.3%) General Obligation (1.3%) $1,000 California, Various Purpose dtd 02/01/04 5.00 % 02/01/33 $1,029,340 1,000 Southlands, Colorado, Medical District #1, Colorado, Ser 2004 7.125 12/01/34 1,026,700 --------- 2,000 2,056,040 --------- Educational Facilities Revenue (2.7%) 1,200 ABAG Finance Authority for Nonprofit Corporations, California, 7.50 05/01/11 1,261,848 National Center for International Schools COPs 500 San Diego County, California, The Burnham Institute COPs 6.25 09/01/29 524,105 1,000 Bellalago Educational Facilities Benefits District, Florida, 5.80 05/01/34 998,370 Bellalago Charter School Ser 2004 B 500 Illinois, Student Housing Village Project Ser 2004 A 5.125 06/01/35 490,310 1,000 Westchester County Industrial Development Agency, New York, 5.375 08/01/24 1,037,150 Guiding Eyes for The Blind Inc Ser 2004 --------- 4,200 4,311,783 --------- Electric Revenue (0.7%) 1,000 Pennsylvania Economic Development Authority, Reliant Energy 6.75 12/01/36 1,069,970 Ser 2001 A --------- Hospital Revenue (16.0%) 1,000 Colbert County - Northwest Health Care Authority, Alabama, 5.75 06/01/27 1,019,520 Helen Keller Hospital Ser 2003 2,000 Baxter County, Arkansas, Baxter County Regional Hospital Impr 5.625 09/01/28 2,041,160 & Refg Ser 1999 B 2,000 Hawaii Department of Budget & Finance, Kuakini Health 2002 Ser 6.375 07/01/32 2,090,860 1,000 Indiana Health Facility Financing Authority, Riverview Hospital 6.125 08/01/31 1,053,280 Ser 2002 2,000 Maryland Health & Higher Educational Facilities Authority, 6.75 07/01/30 2,250,480 University of Maryland Medical Center Ser 2000 600 Gaylord Hospital Financing Authority, Michigan, Otsego Memorial 6.50 01/01/37 589,560 Hospital Ser 2004 3,000 Henderson, Nevada, Catholic Health West 1998 Ser A 5.375 07/01/26 3,051,239 1,500 New Hampshire Higher Educational & Health Facilities Authority, 6.00 05/01/28 1,461,060 Littleton Hospital Assn Ser 1998 A 2,000 New Jersey Health Care Facilities Financing Authority, Raritan 7.25 07/01/27 2,100,400 Bay Medical Center Ser 1994 1,105 Nassau County Industrial Development Agency, New York, 5.875 11/01/11 1,210,483 North Shore Health Ser B 1,000 Monroe County Hospital Authority, Pennsylvania, Pocono 6.00 01/01/43 1,057,140 Medical Center Ser 2003 1,560 Philadelphia Hospitals & Higher Education Facilities Authority, 6.375 11/15/11 1,561,030 Pennsylvania, Chestnut Hill Hospital Ser 1992 1,000 St Mary Hospital Authority, Pennsylvania, Catholic Health East Ser B 5.375 11/15/34 1,043,830 2,000 South Carolina Jobs Economic Development Authority, Palmetto 6.875 08/01/27 2,239,560 Health Alliance Refg Ser 2003 C 1,000 Knox County Health, Educational & Housing Facility Board, 6.50 04/15/31 1,027,830 Tennessee, Baptist Health of East Tennessee Ser 2002 1,000 Decatur Hospital Authority, Texas, Wise Regional Health Ser 7.125 09/01/34 1,076,940 2004 A 350 Hidalgo County, Texas, Health Services Mission Hospital Inc. 5.00 08/15/19 348,744 ---------- 24,115 25,223,116 ---------- Industrial Development/Pollution Control Revenue (14.1%) 2,000 Los Angeles, California, American Airlines Inc Terminal 4 Ser 7.50 12/01/24 2,036,300 2002 C (AMT) 360 Metropolitan Washington Airports Authority, District of Columbia 10.125 09/01/11 360,511 & Virginia, CaterAir International Corp Ser 1991 (AMT) + 2,000 Chicago, Illinois, Chicago O'Hare Int'l Airport/United Airlines Inc 6.30 05/01/16 300,000 Refg Ser 2001 C (a) 1,500 Iowa Finance Authority, IPSCO Inc Ser 1997 (AMT) 6.00 06/01/27 1,546,380 1,500 Dayton, Ohio, Emery Air Freight Corp Refg Ser 1998 A 5.625 02/01/18 1,611,690 480 Zanesville-Muskingum County Port Authority, Ohio, Anchor 10.25 12/01/08 479,976 Glass Container Corp Ser 1989 B (AMT) 2,000 Beaver County Industrial Development Authority, Pennsylvania, 7.75 05/01/20 2,112,300 Toledo Edison Co Collateralized Ser 1995 B 3,330 Carbon County Industrial Development Authority, Pennsylvania, 6.65 05/01/10 3,605,558 Panther Creek Partners Refg 2000 Ser (AMT) 2,125 Lexington County, South Carolina, Ellett Brothers Inc Refg Ser 1998 7.50 09/01/08 2,086,453 1,000 Brazos River Authority, Texas, TXU Electric Co Refg Ser 1999 A (AMT) 7.70 04/01/33 1,182,320 1,000 Chesterfield County Industrial Development Authority, Virginia, 5.50 10/01/09 1,053,450 Virginia Electric & Power Co Ser 1985 3,700 Pittsylvania County Industrial Development Authority, Virginia, 7.45 01/01/09 3,793,794 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 2,068,920 ---------- 22,995 22,237,652 ---------- Mortgage Revenue - Multi-Family (7.0%) Washington County Housing & Redevelopment Authority, Minnesota, 3,885 Courtly Park Ser 1989 A 9.75 06/15/19 3,024,278 1,165 Courtly Park Ser 1989 A (AMT) 10.25 06/15/19 907,220 24,080 Courtly Park Ser 1989 B 0.00 06/15/19 379,500 8,678 Courtly Park Ser 1989 B (AMT) 0.00 06/15/19 136,763 White Bear Lake, Minnesota, 3,715 White Bear Woods Apts Phase II Refg 1989 Ser A 9.75 06/15/19 3,208,423 19,771 White Bear Woods Apts Phase II Refg 1989 Ser B 0.00 06/15/19 311,598 3,000 Brookhaven Industrial Development Agency, New York, 6.375 12/01/37 2,983,290 Woodcrest Estates Ser 1998 A (AMT) ---------- 64,294 10,951,072 ---------- Mortgage Revenue - Single Family (6.4%) Colorado Housing & Finance Authority, 180 1996 Ser B (AMT) 7.65 11/01/26 181,431 800 Ser 1998 D-2 (AMT) 6.35 11/01/29 817,456 25,155 New Hampshire Housing Finance Authority, Residential 1983 Ser B 0.00 01/01/15 9,098,312 ---------- 26,135 10,097,199 ---------- Nursing & Health Related Facilities Revenue (11.0%) Escambia County, Florida, 5,470 Pensacola Care Development Centers Ser 1989 10.25 07/01/11 5,527,599 1,255 Pensacola Care Development Centers Ser 1989 A 10.25 07/01/11 1,268,215 1,000 Orange County Health Facilities Authority, Florida, Westminister 6.75 04/01/34 871,640 Community Care Services Inc Ser 1999 1,000 Pinellas County Health Facilities Authority, Florida, Oaks of 6.25 06/01/34 1,035,520 Clearwater Ser 2004 1,965 Iowa Health Facilities Development Financing Authority, Care 9.25 07/01/25 2,378,809 Initiatives Ser 1996 515 Kentucky Economic Development Financing Authority, 6.50 # 01/01/29 509,407 AHF/Kentucky-Iowa Inc Ser 2003 1,000 Westside Habilitation Center, Louisiana, Intermediate Care 8.375 10/01/13 1,010,960 Facility for the Mentally Retarded Refg Ser 1993 1,775 Massachusetts Development Finance Agency, New England 5.875 11/01/18 1,781,426 Center for Children Ser 1998 1,000 Massachusetts Health & Educational Facilities Authority, The 6.125 07/01/29 981,060 Learning Center for Deaf Children Ser C 870 Mount Vernon Industrial Development Agency, New York, 6.00 06/01/09 880,310 Meadowview at the Wartburg Ser 1999 1,000 St Louis County Industrial Development Authority, Missouri, 6.625 11/15/35 1,013,260 Pediatric Rehabilitation Center Ser 2003 A ---------- 16,850 17,258,206 ---------- Recreational Facilities Revenue (5.7%) 2,000 Sacramento Financing Authority, California, Convention Center 6.25 01/01/30 2,113,800 Hotel 1999 Ser A 1,000 San Diego County, San Diego Natural History Museum COPs 5.70 02/01/28 944,200 Mashantucket (Western) Pequot Tribe, Connecticut, 1,010 1996 Ser A (b) 6.40 09/01/11 1,068,378 1,000 1997 Ser B (b) 5.75 09/01/27 1,029,730 2,000 St Louis Industrial Development Authority, Missouri, St Louis 6.875 12/15/20 1,693,000 Convention Center Headquarters Hotel Ser 2000 (AMT) 2,000 Austin Convention Enterprises Inc, Texas, Convention Center 6.70 01/01/32 2,123,460 Hotel Ser 2000 A ---------- 9,010 8,972,568 ---------- Retirement & Life Care Facilities Revenue (15.7%) 1,000 St Johns County Industrial Development Authority, Florida, 8.00 01/01/30 1,061,860 Glenmoor Ser 1999 A 1,000 Hawaii Department of Budget & Finance, Kahala Nui, 2003 Ser A 8.00 11/15/33 1,067,180 1,500 Lenexa, Kansas, Lakeview Village - Southridge Ser 2002 C 6.875 05/15/32 1,610,685 1,500 Maryland Health & Higher Educational Facilities Authority, Mercy 6.00 04/01/35 1,553,985 Ridge 2003 Ser A 1,500 Massachusetts Development Finance Agency, Loomis 5.75 07/01/23 1,436,640 Communities Ser 1999 A 1,500 Kansas City Industrial Development Agency, Missouri, Bishop 6.50 01/01/35 1,531,185 Spencer 2004 Ser A New Jersey Economic Development Authority, 1,000 Cedar Crest Villiage Inc Ser 2001 A 7.25 11/15/31 1,051,600 1,000 Franciscan Oaks Ser 1997 5.70 10/01/17 986,970 1,000 The Presbyterian Home at Montgomery Ser 2001 A 6.375 11/01/31 1,019,800 2,000 United Methodist Homes of New Jersey Ser 1998 5.125 07/01/25 1,822,040 3,250 Suffolk County Industrial Development Agency, New York, 7.25 11/01/28 3,408,535 Jefferson's Ferry Ser 1999 1,000 North Carolina Medical Care Commission, The Given Estate, Ser 6.50 07/01/32 1,052,050 2003 A 1,000 Chester County Health & Education Facilities Authority, 7.625 07/01/34 1,076,750 Pennsylvania, Jenner's Pond Inc Ser 2002 1,000 Montgomery County Industry Development Authorty, 6.25 02/01/35 1,017,690 Pennsylvania, Whitemarsch Care Project 750 Shelby County Health, Educational & Housing Facilities Board, 7.25 12/01/34 773,783 Tennessee, Village at Germantown Ser 2003 A 1,000 Houston, Health Facilities Authority, Texas, Buckingham Senior 7.125 02/15/34 1,076,490 Living Community Ser 2003 A 2,100 Vermont Economic Development Authority, Wake Robin Corp 6.75 03/01/29 2,067,870 Ser 1999 A 1,000 Peninsula Ports Authorty of Virginia, Virginia Baptist Homes Ser 7.375 12/01/32 1,052,820 2003 A ----------- 24,100 24,667,933 ----------- Tax Allocation Revenue (11.5%) 500 Carlsbad California Improvemnet Act 1915 Assessment District 5.20 09/02/35 495,690 No 2002-2001 Ser A 1,000 San Marcos Community Facilities District No 2002-01, California, 5.95 09/01/35 1,024,590 University Commons Ser 2004 2,000 Elk Valley Public Improvement Corporation, Colorado, Ser 2001 7.35 09/01/31 2,135,620 2,000 Beacon Lakes, Community Development District, Florida, Ser 2003 A 6.90 05/01/35 2,098,760 1,000 Midtown Miami Community Development District, Florida, Ser 2004 A 6.25 05/01/37 1,035,960 2,000 Chicago, Illinois, Lake Shore East, Ser 2002 6.75 12/01/32 2,069,760 725 Lincolnshire, Illinois, Special Service Area No 1 Ser 2004 6.25 03/01/34 766,158 2,000 Des Peres, Missouri, West County Center Ser 2002 5.75 04/15/20 2,055,700 4,000 Fenton, Missouri, Gravois Bluffs Redevelopment Ser 2001 A Refg 7.00 10/01/21 4,315,480 1,995 Las Vegas District No 808, Nevada, Summerlin Area Ser 2001 6.75 06/01/21 2,060,576 ----------- 17,220 18,058,294 ----------- Transportation Facilities Revenue (4.4%) 5,000 E-470 Public Highway Authority, Colorado, Ser 1997 B (MBIA) 0.00 09/01/15 3,178,800 1,780 Mid-Bay Bridge Authority, Florida, Sr Lien Crossover Refg Ser 5.85 10/01/13 1,948,815 1993 A (Ambac) 750 Augusta, Georgia, Airport Passengers Facilities Ser A 5.15 01/01/35 751,328 1,000 Nevada Department of Business & Industry, Las Vegas Monorail 7.375 01/01/40 1,020,360 2nd Tier Ser 2000 ----------- 8,530 6,899,303 ----------- Refunded (0.8%) 1,000 Illinois Health Facilities Authority, Riverside Health Ser 2000 6.85 11/15/29++ 1,191,890 ----------- 221,449 TOTAL TAX-EXEMPT MUNICIPAL BONDS (Cost $161,386,367) 152,995,026 ----------- SHORT TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (1.7%) 1,700 Harris County Health Facilities Development Corporation, Texas, 1.80* 07/01/37 1,700,000 Methodist Hospital Ser 2002 (Demand 03/01/05) 1,025 North Central Texas Health Facilities Development Corporation, 1.79* 12/01/15 1,025,000 Presbyterian Medical Center Ser 1985 D (MBIA) (Demand 03/01/05) ----------- 2,725 TOTAL SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (Cost $2,725,000) 2,725,000 ----------- $224,174 TOTAL INVESTMENTS (Cost $164,111,367)(c) 99.0% 155,720,026 OTHER ASSETS IN EXCESS OF LIABILITIES 1.0% 1,616,085 ----- ------------ NET ASSETS 100.0% $157,336,111 ===== ============ -------------- 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 $7,018,234 and the aggregate gross unrealized depreciation is $15,409,575 , resulting in net unrealized depreciation of $8,391,341. Bond Insurance: ---------------- Ambac Ambac Assurance Corporation. MBIA Municipal Bond Investors Assurance Corporation. GEOGRAPHIC SUMMARY OF INVESTMENTS Based on Market Value as a Percent of Net Assets Alabama 0.7 % Arkansas 1.3 California 6.0 Colorado 4.7 Connecticut 1.3 District of Columbia 0.2 Florida 10.1 Georgia 0.5 Hawaii 2.0 Illinois 3.1 Indiana 0.7 Iowa 2.5 Kansas 1.0 Kentucky 0.3 Louisiana 0.6 Maryland 2.4 Massachusetts 2.7 Michigan 0.4 Minnesota 5.1 Missouri 6.7 Nevada 3.9 New Hampshire 6.7 New Jersey 4.4 New York 6.1 North Carolina 0.7 Ohio 1.3 Pennsylvania 8.0 South Carolina 2.7 Tennessee 1.1 Texas 5.4 Vermont 1.3 Virginia 3.8 West Virginia 1.3 Joint exemptions* 0.0 ---- Total 99.0% ==== ------------ * Joint exemptions have been included in each geographic location. 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 April 19, 2005 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 April 19, 2005 /s/ Francis Smith Francis Smith Principal Financial Officer April 19, 2005 3