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 811-5611 Name of Fund: BlackRock MuniVest Fund, Inc. Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, BlackRock MuniVest Fund, Inc., 800 Scudders Mill Road, Plainsboro, NJ 08536. Mailing address: P.O. Box 9011, Princeton, NJ 08543-9011 Registrant's telephone number, including area code: (609) 282-2800 Date of fiscal year end: 08/31/2007 Date of reporting period: 09/01/06 - 11/30/06 Item 1 - Schedule of Investments BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- Alabama - 4.5% $ 9,700 Birmingham, Alabama, Special Care Facilities Financing Authority, Revenue Refunding Bonds (Ascension Health Credit), Series C-2, 5% due 11/15/2036 $ 10,294 2,550 Camden, Alabama, IDB, Exempt Facilities Revenue Bonds (Weyerhaeuser Company), Series A, 6.125% due 12/01/2024 2,839 3,500 Huntsville, Alabama, Health Care Authority Revenue Bonds, Series A, 5.75% due 6/01/2031 3,764 5,000 Huntsville, Alabama, Health Care Authority Revenue Bonds, Series B, 5.75% due 6/01/2032 5,441 5,000 Selma, Alabama, IDB, Environmental Improvement Revenue Refunding Bonds (International Paper Company Project), Series B, 5.50% due 5/01/2020 5,348 ----------------------------------------------------------------------------------------------------------------------------------- Alaska - 1.3% 7,405 Anchorage, Alaska, Lease Revenue Bonds (Correctional Facility), 6% due 2/01/2010 (a)(i) 7,948 ----------------------------------------------------------------------------------------------------------------------------------- Arizona - 1.6% 4,100 Maricopa County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project 1), Series A, 6.75% due 7/01/2029 4,201 2,100 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series E, 7.25% due 7/01/2031 2,314 500 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series I, 6.10% due 7/01/2024 530 1,000 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series I, 6.30% due 7/01/2031 1,065 1,565 Pima County, Arizona, IDA, Education Revenue Refunding Bonds (Arizona Charter Schools Project II), Series A, 6.75% due 7/01/2021 1,677 ----------------------------------------------------------------------------------------------------------------------------------- California - 18.3% 18,850 California Health Facilities Financing Authority Revenue Bonds (Kaiser Permanente), Series A, 5.25% due 4/01/2039 20,252 1,360 California State, GO, 5.50% due 4/01/2014 (a) 1,537 12,210 California State, GO, 5.50% due 4/01/2030 13,818 5,000 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.50% due 6/01/2022 5,538 6,000 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.50% due 6/01/2023 6,642 ----------------------------------------------------------------------------------------------------------------------------------- Portfolio Abbreviations To simplify the listings of BlackRock MuniVest Fund, Inc.'s portfolio holdings in the Schedule of Investments, we have abbreviated the names of many of the securities according to the list below. AMT Alternative Minimum Tax (subject to) DRIVERS Derivative Inverse Tax-Exempt Receipts EDA Economic Development Authority GO General Obligation Bonds HDA Housing Development Authority HFA Housing Finance Agency IDA Industrial Development Authority IDB Industrial Development Board IDR Industrial Development Revenue Bonds M/F Multi-Family PCR Pollution Control Revenue Bonds RIB Residual Interest Bonds S/F Single-Family VRDN Variable Rate Demand Notes BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- $ 11,075 California State Public Works Board, Lease Revenue Bonds (Department of Mental Health - Coalinga State Hospital), Series A, 5.125% due 6/01/2029 $ 11,802 11,250 California State, Various Purpose, GO, 5.50% due 11/01/2033 12,404 5,240 California Statewide Communities Development Authority, Health Facility Revenue Bonds (Memorial Health Services), Series A, 6% due 10/01/2023 5,865 1,250 Chula Vista, California, IDR (San Diego Gas and Electric Company), AMT, Series B, 5% due 12/01/2027 1,330 10,725 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-3, 7.875% due 6/01/2042 13,174 3,750 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-4, 7.80% due 6/01/2042 4,590 1,425 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-5, 7.875% due 6/01/2042 1,750 13,900 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series B, 5.375% due 6/01/2010 (a) 14,752 ----------------------------------------------------------------------------------------------------------------------------------- Colorado - 0.6% 625 Colorado HFA, Revenue Refunding Bonds (S/F Program), AMT, Senior Series A-2, 6.60% due 5/01/2028 643 225 Colorado HFA, Revenue Refunding Bonds (S/F Program), AMT, Senior Series A-2, 7.50% due 4/01/2031 230 3,000 Colorado Health Facilities Authority Revenue Bonds (Lutheran Medical Center), Series A, 5.25% due 6/01/2034 3,157 ----------------------------------------------------------------------------------------------------------------------------------- Connecticut - 0.5% 2,810 Mohegan Tribe Indians Gaming Authority, Connecticut, Public Improvement Revenue Refunding Bonds (Priority Distribution), 6.25% due 1/01/2031 3,005 ----------------------------------------------------------------------------------------------------------------------------------- Florida - 3.9% 6,000 Highlands County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), Series C, 5.25% due 11/15/2036 6,453 6,000 Highlands County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), Series D, 5.375% due 11/15/2013 (a) 6,639 10,320 Orange County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), 5.625% due 11/15/2032 11,283 ----------------------------------------------------------------------------------------------------------------------------------- Georgia - 3.2% 4,600 Georgia Municipal Electric Authority, Power Revenue Refunding Bonds, Series W, 6.60% due 1/01/2018 5,438 250 Georgia Municipal Electric Authority, Power Revenue Refunding Bonds, Series W, 6.60% due 1/01/2018 (e) 292 250 Georgia Municipal Electric Authority, Power Revenue Refunding Bonds, Series Y, 10% due 1/01/2010 (e) 296 4,390 Milledgeville-Baldwin County, Georgia, Development Authority Revenue Bonds (Georgia College and State University Foundation), 5.50% due 9/01/2024 4,747 BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- $ 3,500 Milledgeville-Baldwin County, Georgia, Development Authority Revenue Bonds (Georgia College and State University Foundation), 5.625% due 9/01/2030 $ 3,816 4,785 Monroe County, Georgia, Development Authority, PCR, Refunding (Oglethorpe Power Corporation-Scherer), Series A, 6.80% due 1/01/2011 5,317 ----------------------------------------------------------------------------------------------------------------------------------- Idaho - 0.1% 390 Idaho Housing Agency, S/F Mortgage Revenue Refunding Bonds, AMT, Series E-2, 6.90% due 1/01/2027 400 ----------------------------------------------------------------------------------------------------------------------------------- Illinois - 12.3% 5,000 Chicago, Illinois, O'Hare International Airport, General Airport Revenue Refunding Bonds, Third Lien, AMT, Series A, 5.75% due 1/01/2019 (c) 5,418 11,200 Chicago, Illinois, O'Hare International Airport Revenue Bonds, Third Lien, AMT, Series B-2, 6% due 1/01/2029 (n) 12,703 80 Chicago, Illinois, S/F Mortgage Revenue Bonds, AMT, Series C, 7% due 3/01/2032 (d)(k) 82 10,000 Hodgkins, Illinois, Environmental Improvement Revenue Bonds (Metro Biosolids Management LLC Project), AMT, 6% due 11/01/2023 10,447 2,140 Illinois Development Finance Authority Revenue Bonds (Community Rehabilitation Providers Facilities), Series A, 6.50% due 7/01/2022 2,348 1,365 Illinois Development Finance Authority, Revenue Refunding Bonds (Community Rehabilitation Providers Facilities), Series A, 6% due 7/01/2015 1,392 455 Illinois HDA, Revenue Refunding Bonds (M/F Program), Series 5, 6.75% due 9/01/2023 461 13 Kane and De Kalb Counties, Illinois, Community Unit School District Number 302, GO, DRIVERS, Series 283, 7.545% due 2/01/2018 (f)(m) 15 5,000 McLean and Woodford Counties, Illinois, Community Unit, School District Number 005, GO, Refunding, 6.25% due 12/01/2014 (i) 5,599 4,000 McLean and Woodford Counties, Illinois, Community Unit, School District Number 005, GO, Refunding, 6.375% due 12/01/2016 (i) 4,502 18,550 Metropolitan Pier and Exposition Authority, Illinois, Dedicated State Tax Revenue Refunding Bonds (McCormick Place Expansion Project), Series B, 5.75% due 6/15/2023 (c) 20,502 3,500 Regional Transportation Authority, Illinois, Revenue Bonds, Series A, 7.20% due 11/01/2020 (h) 4,409 4,000 Regional Transportation Authority, Illinois, Revenue Bonds, Series C, 7.75% due 6/01/2020 (f) 5,579 1,475 Will County, Illinois, School District Number 122 (New Lenox Elementary), GO, Series A, 6.50% due 11/01/2010 (a)(i) 1,633 505 Will County, Illinois, School District Number 122 (New Lenox Elementary), GO, Series A, 6.50% due 11/01/2013 (i) 556 395 Will County, Illinois, School District Number 122 (New Lenox Elementary), GO, Series A, 6.50% due 11/01/2015 (i) 434 BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- Indiana - 10.3% $ 5,000 Delaware County, Indiana, Hospital Authority, Hospital Revenue Bonds (Cardinal Health System Obligated Group), 5.125% due 8/01/2029 $ 5,250 16,350 Indiana Health and Educational Facilities Financing Authority, Hospital Revenue Bonds (Clarian Health Obligation), Series A, 5.25% due 2/15/2040 17,507 8,650 Indiana Health and Educational Facility Financing Authority, Revenue Refunding Bonds (Ascension Health Credit), Series B-5, 5% due 11/15/2036 9,179 4,290 Indiana State HFA, S/F Mortgage Revenue Refunding Bonds, Series A, 6.80% due 1/01/2017 (j) 4,400 8,195 Indiana Transportation Finance Authority, Highway Revenue Bonds, Series A, 6.80% due 12/01/2016 9,811 15,335 Indianapolis, Indiana, Local Public Improvement Bond Bank, Revenue Refunding Bonds, Series D, 6.75% due 2/01/2014 17,592 ----------------------------------------------------------------------------------------------------------------------------------- Kansas - 0.6% 3,805 Sedgwick and Shawnee Counties, Kansas, S/F Mortgage Revenue Bonds (Mortgage-Backed Securities Program), AMT, Series A-4, 5.95% due 12/01/2033 (d) 3,888 ----------------------------------------------------------------------------------------------------------------------------------- Kentucky - 2.5% 14,350 Louisville and Jefferson County, Kentucky, Metropolitan Government Health System, Revenue Refunding Bonds (Norton Healthcare, Inc.), 5.25% due 10/01/2036 15,374 ----------------------------------------------------------------------------------------------------------------------------------- Louisiana - 5.1% 10,575 Louisiana Local Government, Environmental Facilities, Community Development Authority Revenue Bonds (Capital Projects and Equipment Acquisition), Series A, 6.30% due 7/01/2030 (h) 12,888 6,220 Louisiana Public Facilities Authority, Hospital Revenue Bonds (Franciscan Missionaries of Our Lady Health System, Inc.), Series A, 5% due 8/15/2033 6,515 11,660 Louisiana Public Facilities Authority, Hospital Revenue Bonds (Franciscan Missionaries of Our Lady Health System, Inc.), Series A, 5.25% due 8/15/2036 12,466 ----------------------------------------------------------------------------------------------------------------------------------- Maine - 0.3% 775 Portland, Maine, Housing Development Corporation, Senior Living Revenue Bonds (Avesta Housing Development Corporation Project), Series A, 5.70% due 8/01/2021 820 1,190 Portland, Maine, Housing Development Corporation, Senior Living Revenue Bonds (Avesta Housing Development Corporation Project), Series A, 6% due 2/01/2034 1,268 ----------------------------------------------------------------------------------------------------------------------------------- Massachusetts - 7.4% 2,035 Boston, Massachusetts, Water and Sewer Commission Revenue Bonds, 9.25% due 1/01/2011 (e) 2,416 3,010 Massachusetts Bay Transportation Authority, Revenue Refunding Bonds (General Transportation System), Series A, 7% due 3/01/2019 3,769 30,000 Massachusetts State Water Resource Authority Revenue Bonds, Series A, 6.50% due 7/15/2019 36,238 3,480 Massachusetts State Water Resource Authority, Revenue Refunding Bonds, Series A, 6% due 8/01/2010 (a)(f) 3,804 ----------------------------------------------------------------------------------------------------------------------------------- BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- Michigan - 9.4% $ 7,695 Delta County, Michigan, Economic Development Corporation, Environmental Improvement Revenue Refunding Bonds (Mead Westvaco-Escanaba), Series A, 6.25% due 4/15/2012 (a) $ 8,695 3,715 Macomb County, Michigan, Hospital Finance Authority, Hospital Revenue Bonds (Mount Clemens General Hospital), Series B, 5.75% due 11/15/2025 3,901 4,250 Macomb County, Michigan, Hospital Finance Authority, Hospital Revenue Bonds (Mount Clemens General Hospital), Series B, 5.875% due 11/15/2034 4,520 1,900 Michigan State Hospital Finance Authority, Hospital Revenue Refunding Bonds (Crittenton Hospital), Series A, 5.625% due 3/01/2027 2,046 5,900 Michigan State Hospital Finance Authority, Revenue Bonds (Mid-Michigan Obligor Group), Series A, 5% due 4/15/2036 6,183 10,000 Michigan State Hospital Finance Authority, Revenue Bonds (Trinity Health Credit Group), Series A, 5% due 12/01/2026 10,707 6,500 Michigan State Hospital Finance Authority, Revenue Bonds (Trinity Health Credit Group), Series A, 5% due 12/01/2031 6,938 3,000 Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Henry Ford Health System), Series A, 5.25% due 11/15/2032 3,249 10,600 Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Henry Ford Health System), Series A, 5% due 11/15/2038 11,152 1,000 Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Sinai Hospital), 6.70% due 1/01/2026 1,015 ----------------------------------------------------------------------------------------------------------------------------------- Minnesota - 1.5% 7,235 Minneapolis, Minnesota, Health Care System Revenue Bonds (Allina Health System), Series A, 5.75% due 11/15/2032 7,869 1,405 Saint Cloud, Minnesota, Health Care Revenue Refunding Bonds (Saint Cloud Hospital Obligation Group), Series A, 6.25% due 5/01/2017 (i) 1,535 ----------------------------------------------------------------------------------------------------------------------------------- Mississippi - 6.0% 9,160 Lowndes County, Mississippi, Solid Waste Disposal and PCR, Refunding (Weyerhaeuser Company Project), Series A, 6.80% due 4/01/2022 11,213 4,500 Lowndes County, Mississippi, Solid Waste Disposal and PCR, Refunding (Weyerhaeuser Company Project), Series B, 6.70% due 4/01/2022 5,461 20,705 Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources Inc. Project), 5.875% due 4/01/2022 20,739 ----------------------------------------------------------------------------------------------------------------------------------- Missouri - 0.5% 2,600 Missouri State Development Finance Board, Infrastructure Facilities Revenue Refunding Bonds (Branson), Series A, 5.50% due 12/01/2032 2,747 240 Missouri State Housing Development Commission, S/F Mortgage Revenue Bonds (Homeowner Loan), AMT, Series A, 7.50% due 3/01/2031 (d) 249 ----------------------------------------------------------------------------------------------------------------------------------- Montana - 1.0% 6,000 Forsyth, Montana, PCR, Refunding (Portland General Electric Company), Series A, 5.20% due 5/01/2033 6,150 ----------------------------------------------------------------------------------------------------------------------------------- BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- Nebraska - 0.1% $ 415 Nebraska Investment Finance Authority, S/F Housing Revenue Bonds, AMT, Series C, 6.30% due 9/01/2028 (d)(k) $ 419 ----------------------------------------------------------------------------------------------------------------------------------- Nevada - 0.8% 3,475 Nevada Housing Division, Multi-Unit Housing Revenue Bonds (Arville Electric Project), AMT, 6.60% due 10/01/2023 (b) 3,546 1,175 Nevada Housing Division Revenue Bonds (Multi-Unit Housing), AMT, Issue B, 7.45% due 10/01/2017 (b) 1,177 15 Nevada Housing Division Revenue Bonds (S/F Program), AMT, Series A, 6.55% due 10/01/2012 (j) 15 ----------------------------------------------------------------------------------------------------------------------------------- New Hampshire - 0.7% 1,275 New Hampshire Health and Education Facilities Authority, Hospital Revenue Bonds (Catholic Medical Center), 5% due 7/01/2032 1,334 2,675 New Hampshire Health and Education Facilities Authority, Revenue Refunding Bonds (Elliot Hospital), Series B, 5.60% due 10/01/2022 2,908 ----------------------------------------------------------------------------------------------------------------------------------- New Jersey - 5.3% 9,080 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.50% due 6/15/2024 9,646 2,885 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.75% due 6/15/2029 3,153 2,855 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.50% due 6/15/2031 3,055 6,695 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.75% due 6/15/2034 7,271 8,480 Tobacco Settlement Financing Corporation of New Jersey, Asset-Backed Revenue Bonds, 7% due 6/01/2041 9,871 ----------------------------------------------------------------------------------------------------------------------------------- New Mexico - 0.5% 3,300 Farmington, New Mexico, PCR, Refunding (Public Service Company of New Mexico - San Juan Project), Series A, 5.80% due 4/01/2022 3,306 ----------------------------------------------------------------------------------------------------------------------------------- New York - 2.3% 400 Metropolitan Transportation Authority, New York, Dedicated Tax Fund, Revenue Refunding Bonds, VRDN, Series B, 3.60% due 11/01/2022 (i)(l) 400 1,125 New York City, New York, City Transitional Finance Authority Revenue Bonds, RIB, Series 283, 8.72% due 11/15/2015 (m) 1,345 965 New York City, New York, GO, Refunding, Series A, 6.375% due 5/15/2014 (f) 1,060 670 New York City, New York, GO, Series F, 5.25% due 1/15/2013 (a) 733 6,480 New York City, New York, GO, Series F, 5.25% due 1/15/2033 6,930 360 New York City, New York, GO, Series I, 6.25% due 4/15/2007 (a)(n) 367 20 New York City, New York, GO, Series I, 6.25% due 4/15/2017 (n) 20 2,000 New York City, New York, GO, Sub-Series I-1, 5% due 4/01/2025 2,146 400 New York State Local Government Assistance Corporation, Revenue Refunding Bonds, Sub-Lien, VRDN, Series 4V, 3.40% due 4/01/2022 (i)(l) 400 1,200 Triborough Bridge and Tunnel Authority, New York, General Purpose Revenue Refunding Bonds, VRDN, Series C, 3.42% due 1/01/2032 (h)(l) 1,200 ----------------------------------------------------------------------------------------------------------------------------------- BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- North Carolina - 0.7% $ 4,105 Gaston County, North Carolina, Industrial Facilities and Pollution Control Financing Authority, Revenue Bonds (National Gypsum Company Project), AMT, 5.75% due 8/01/2035 $ 4,419 ----------------------------------------------------------------------------------------------------------------------------------- Ohio - 0.2% 1,000 Richland County, Ohio, Hospital Facilities Revenue Refunding Bonds (MedCentral Health System), 5.25% due 11/15/2036 1,073 ----------------------------------------------------------------------------------------------------------------------------------- Pennsylvania - 4.0% 2,440 Pennsylvania State Higher Education Assistance Agency Revenue Bonds, Capital Acquisition, 6.125% due 12/15/2010 (a)(c) 2,676 6,250 Pennsylvania State Higher Educational Facilities Authority Revenue Bonds (University of Pennsylvania Medical Center Health System), Series A, 6% due 1/15/2031 6,821 1,000 Philadelphia, Pennsylvania, Authority for Industrial Development, Senior Living Revenue Bonds (Arbor House Inc. Project), Series E, 6.10% due 7/01/2033 1,070 1,355 Philadelphia, Pennsylvania, Authority for Industrial Development, Senior Living Revenue Bonds (Rieder House Project), Series A, 6.10% due 7/01/2033 1,450 9,280 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Bonds (Guthrie Healthcare System), Series B, 7.125% due 12/01/2031 11,135 1,750 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A, 6.25% due 12/01/2018 1,938 ----------------------------------------------------------------------------------------------------------------------------------- South Carolina - 2.1% 1,000 Georgetown County, South Carolina, Environmental Improvement Revenue Refunding Bonds (International Paper Company Project), AMT, Series A, 5.55% due 12/01/2029 1,061 3,500 Lexington County, South Carolina, Health Services District Inc., Hospital Revenue Refunding and Improvement Bonds, 5.50% due 11/01/2032 3,753 2,450 Medical University Hospital Authority, South Carolina, Hospital Facilities Revenue Refunding Bonds, 6.50% due 8/15/2012 (a) 2,818 5,000 Richland County, South Carolina, Environmental Improvement Revenue Refunding Bonds (International Paper), AMT, 6.10% due 4/01/2023 5,467 ----------------------------------------------------------------------------------------------------------------------------------- Tennessee - 1.5% 2,000 McMinn County, Tennessee, IDB, Solid Waste Revenue Bonds (Recycling Facility-Calhoun Newsprint), AMT, 7.40% due 12/01/2022 2,030 2,380 Shelby County, Tennessee, Health, Educational and Housing Facility Board, Hospital Revenue Refunding Bonds (Methodist Healthcare), 6.50% due 9/01/2012 (a) 2,740 4,120 Shelby County, Tennessee, Health, Educational and Housing Facility Board, Hospital Revenue Refunding Bonds (Methodist Healthcare), 6.50% due 9/01/2012 (a) 4,742 ----------------------------------------------------------------------------------------------------------------------------------- Texas - 13.9% 6,000 Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises Inc.), First Tier, Series A, 6.70% due 1/01/2011 (a) 6,411 1,290 Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises Inc.), First Tier, Series A, 6.70% due 1/01/2011 (a) 1,369 3,055 Brazos River Authority, Texas, PCR, Refunding (Texas Utility Company), AMT, Series A, 7.70% due 4/01/2033 3,579 BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- $ 11,460 Brazos River, Texas, Harbor Navigation District, Brazoria County Environmental Revenue Refunding Bonds (Dow Chemical Company Project), AMT, Series A-7, 6.625% due 5/15/2033 $ 12,879 3,000 Gregg County, Texas, Health Facilities Development Corporation, Hospital Revenue Bonds (Good Shepherd Medical Center Project), 6.875% due 10/01/2010 (a)(g) 3,372 10,250 Guadalupe-Blanco River Authority, Texas, Sewage and Solid Waste Disposal Facility Revenue Bonds (E. I. du Pont de Nemours and Company Project), AMT, 6.40% due 4/01/2026 10,472 6,000 Gulf Coast, Texas, Waste Disposal Authority, Revenue Refunding Bonds (International Paper Company), AMT, Series A, 6.10% due 8/01/2024 6,500 5,500 Harris County-Houston Sports Authority, Texas, Revenue Refunding Bonds, Senior Lien, Series G, 5.75% due 11/15/2020 (c) 5,973 1,795 Houston, Texas, Industrial Development Corporation Revenue Bonds (Air Cargo), AMT, 6.375% due 1/01/2023 1,931 1,875 Mansfield, Texas, Independent School District, GO, Refunding, 6.625% due 2/15/2010 (a) 2,048 155 Mansfield, Texas, Independent School District, GO, Refunding, 6.625% due 2/15/2015 169 9,355 Matagorda County, Texas, Navigation District Number 1, Revenue Refunding Bonds (Centerpoint Energy Project), 5.60% due 3/01/2027 9,965 5,225 Midway, Texas, Independent School District, GO, Refunding, 6.125% due 8/15/2014 5,668 2,700 Port Corpus Christi, Texas, Revenue Refunding Bonds (Celanese Project), Series A, 6.45% due 11/01/2030 2,926 5,000 Red River Authority, Texas, PCR, Refunding (Celanese Project), AMT, Series B, 6.70% due 11/01/2030 5,495 7,280 Sabine River Authority, Texas, PCR, Refunding (TXU Electric Company Project/TXU Energy Company LLC), Series C, 5.20% due 5/01/2028 7,583 ----------------------------------------------------------------------------------------------------------------------------------- Vermont - 0.2% 1,000 Vermont Educational and Health Buildings Financing Agency, Developmental and Mental Health Revenue Bonds (Howard Center for Human Services), Series A, 6.375% due 6/15/2022 1,073 ----------------------------------------------------------------------------------------------------------------------------------- Virginia - 0.2% 1,425 Chesterfield County, Virginia, IDA, PCR (Virginia Electric and Power Company), Series A, 5.875% due 6/01/2017 1,544 ----------------------------------------------------------------------------------------------------------------------------------- Washington - 3.4% 3 Energy Northwest, Washington, Electric Revenue Refunding Bonds, DRIVERS, Series 255, 8.042% due 7/01/2018 (h)(m) 3 2,370 Seattle, Washington, Housing Authority Revenue Bonds (Replacement Housing Project), 6.125% due 12/01/2032 2,447 408 Washington State, GO, Trust Receipts, Class R, Series 6, 7.972% due 1/01/2014 (i)(m) 466 14,320 Washington State Public Power Supply System, Revenue Refunding Bonds (Nuclear Project Number 1), Series B, 7.125% due 7/01/2016 17,990 ----------------------------------------------------------------------------------------------------------------------------------- BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Face State Amount Municipal Bonds Value ----------------------------------------------------------------------------------------------------------------------------------- Wisconsin - 2.4% $ 3,960 Badger Tobacco Asset Securitization Corporation, Wisconsin, Asset-Backed Revenue Bonds, 6.125% due 6/01/2027 $ 4,285 1,765 Milwaukee, Wisconsin, Revenue Bonds (Air Cargo), AMT, 6.50% due 1/01/2025 1,910 5,000 Wisconsin State Health and Educational Facilities Authority, Mortgage Revenue Bonds (Hudson Memorial Hospital), 5.70% due 1/15/2029 (j) 5,367 3,040 Wisconsin State Health and Educational Facilities Authority Revenue Bonds (Synergyhealth Inc.), 6% due 11/15/2032 3,346 ----------------------------------------------------------------------------------------------------------------------------------- Puerto Rico - 0.5% 2,750 Puerto Rico Commonwealth, Public Improvement, GO, Series A, 5.25% due 7/01/2026 3,003 ----------------------------------------------------------------------------------------------------------------------------------- U.S. Virgin 8,000 Virgin Islands Government Refinery Facilities, Revenue Refunding Bonds (Hovensa Coker Islands - 1.5% Project), AMT, 6.50% due 7/01/2021 9,068 ----------------------------------------------------------------------------------------------------------------------------------- Total Municipal Bonds (Cost - $748,833) - 131.2% 814,562 ----------------------------------------------------------------------------------------------------------------------------------- Municipal Bonds Held in Trust (q) ----------------------------------------------------------------------------------------------------------------------------------- Illinois - 7.4% 14,000 Chicago, Illinois, O'Hare International Airport, General Airport Revenue Refunding Bonds, Third Lien, AMT, Series A, 5.75% due 1/01/2020 (c) 15,171 17,080 Chicago, Illinois, O'Hare International Airport Revenue Bonds, Third Lien, AMT, Series B-2, 6% due 1/01/2027 (c) 19,360 Kane and De Kalb Counties, Illinois, Community Unit School District Number 302, GO (f): 2,975 5.75% due 2/01/2018 3,344 2,710 5.75% due 2/01/2019 3,046 4,780 5.75% due 2/01/2021 5,373 ----------------------------------------------------------------------------------------------------------------------------------- Massachusetts - 3.5% 20,000 Massachusetts State School Building Authority, Dedicated Sales Tax Revenue Bonds, Series A, 5% due 8/15/2030 (i) 21,503 ----------------------------------------------------------------------------------------------------------------------------------- New York - 7.1% 13,500 New York City, New York, City Transitional Finance Authority Revenue Bonds, Future Tax Secured, Series B, 6.25% due 11/15/2018 14,824 26,750 New York State Dormitory Authority, State University Educational Facilities Revenue Refunding Bonds, Series 1989, 6% due 5/15/2010 (a)(c) 29,166 ----------------------------------------------------------------------------------------------------------------------------------- Oregon - 1.3% 7,610 Portland, Oregon, Sewer System Revenue Bonds, Series A, 5.75% due 8/01/2010 (a)(f) 8,189 ----------------------------------------------------------------------------------------------------------------------------------- Texas - 6.3% 20,970 Harris County, Texas, Health Facilities Development Corporation, Revenue Refunding Bonds (School Health Care System), Series B, 5.75% due 7/01/2027 (e) 25,773 12,500 San Antonio, Texas, Electric and Gas Revenue Bonds, Series A, 5.75% due 2/01/2010 (a) 13,325 ----------------------------------------------------------------------------------------------------------------------------------- Washington - 8.6% Energy Northwest, Washington, Electric Revenue Refunding Bonds (Columbia Generating Station): 11,660 Series A, 5.75% due 7/01/2018 (c) 12,868 7,015 Series B, 6% due 7/01/2018 (h) 7,830 14,700 Energy Northwest, Washington, Electric Revenue Refunding Bonds (Project Number 1), Series B, 6% due 7/01/2017 (b) 16,463 15,385 Washington State, Various Purpose, GO, Series B, 6% due 1/01/2010 (a)(i) 16,486 ----------------------------------------------------------------------------------------------------------------------------------- Total Municipal Bonds Held in Trust (Cost -$200,240) - 34.2% 212,721 ----------------------------------------------------------------------------------------------------------------------------------- BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) Shares Held Short-Term Securities Value ----------------------------------------------------------------------------------------------------------------------------------- 7,000 Merrill Lynch Institutional Tax-Exempt Fund, 3.38% (o)(p) $ 7,000 ----------------------------------------------------------------------------------------------------------------------------------- Total Short-Term Securities (Cost - $7,000) - 1.1% 7,000 ----------------------------------------------------------------------------------------------------------------------------------- Total Investments (Cost - $956,073*) - 166.5% 1,034,283 Other Assets Less Liabilities - 3.4% 20,864 Liability for Trust Certificates, Including Interest Expense Payable - (16.1%) (99,841) Preferred Stock, at Redemption Value - (53.8%) (334,313) ---------- Net Assets Applicable to Common Stock - 100.0% $ 620,993 ========== * The cost and unrealized appreciation (depreciation) of investments as of November 30, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost $ 863,367 ========= Gross unrealized appreciation $ 72,334 Gross unrealized depreciation (186) --------- Net unrealized appreciation $ 72,148 ========= (a) Prerefunded. (b) FNMA Collateralized. (c) MBIA Insured. (d) FNMA/GNMA Collateralized. (e) Escrowed to maturity. (f) FGIC Insured. (g) Radian Insured. (h) AMBAC Insured. (i) FSA Insured. (j) FHA Insured. (k) FHLMC Collateralized. (l) Security may have a maturity of more than one year at time of issuance, but has variable rate and demand features that qualify it as a short-term security. The rate disclosed is that currently in effect. This rate changes periodically based upon prevailing market rates. (m) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (n) XL Capital Insured. BlackRock MuniVest Fund, Inc. Schedule of Investments as of November 30, 2006 (in Thousands) (o) 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 Dividend Affiliate Activity Income -------------------------------------------------------------------------- Merrill Lynch Institutional Tax-Exempt Fund 6,578 $ 111 -------------------------------------------------------------------------- (p) Represents the current yield as of November 30, 2006. (q) Securities represent underlying bonds transferred to a separate securitization trust established in a tender option bond transaction in which the Fund may have acquired the residual interest certificates. These securities serve as collateral in a financing transaction. o Forward interest rate swaps outstanding as of November 30, 2006 were as follows: -------------------------------------------------------------------------- Notional Unrealized Amount Depreciation -------------------------------------------------------------------------- Pay a fixed rate of 3.901% and receive a floating rate based on 1-week Bond Market Association rate Broker, JPMorgan Chase Expires December 2016 $ 17,250 $ (475) Pay a fixed rate of 3.722% and receive a floating rate based on 1-week Bond Market Association rate Broker, JPMorgan Chase Expires January 2017 $ 25,000 25,000 Pay a fixed rate of 3.636% and receive a floating rate based on 1-week Bond Market Association rate Broker, JPMorgan Chase Expires February 2017 $ 25,000 25,000 Pay a fixed rate of 4.158% and receive a floating rate based on 1-week Bond Market Association rate Broker, JPMorgan Chase Expires December 2026 $ 25,000 25,000 -------------------------------------------------------------------------- Total $ (2,153) =========== Item 2 - Controls and Procedures 2(a) - The Registrant's principal executive and principal financial officers have evaluated the Registrant's disclosure controls and procedures, including internal control over financial reporting, within 90 days of this filing. Such principal officers have concluded that as of January 23, 2007 the Registrant's disclosure controls and procedures were effective in design and operation to reasonably ensure that information required to be disclosed by the Registrant in this Form N-Q was recorded, processed, summarized, and reported within the required time periods, and were sufficient to form the basis of the certifications required by Rule 30a-2 of the Investment Company Act of 1940, as amended. Prior to reaching that conclusion, such principal officers had become aware of matters relating to the Registrant's participation in certain inverse floater structures that necessitated adjustments to financial information included in Item 1 of this filing. As a result, management of the Registrant had reevaluated certain disclosure controls and procedures determined not to be effective, as discussed more fully below. Management of the Registrant is responsible for establishing and maintaining effective internal control over financial reporting. In fulfilling this responsibility, estimates and judgments by management are required to assess the expected benefits and related costs of controls. The Registrant's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles. Such internal control includes policies and procedures that provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of a registrant's assets that could have a material effect on the financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. A control deficiency exists when the design or operation of a control does not allow management or employees, in the normal course of performing their assigned functions, to prevent or detect misstatements on a timely basis. A significant deficiency is a control deficiency, or combination of control deficiencies, that adversely affects the Registrant's ability to initiate, authorize, record, process or report financial data reliably in accordance with generally accepted accounting principles such that there is more than a remote likelihood that a misstatement of the Registrant's annual or interim financial statements that is more than inconsequential will not be prevented or detected. A material weakness is a significant deficiency, or combination of significant deficiencies, that results in more than a remote likelihood that a material misstatement of the annual or interim financial statements will not be prevented or detected. The Registrant identified the following control deficiency, that was determined to be a material weakness, as defined above, in the Registrant's internal control over financial reporting at October 31, 2006. The Registrant's controls related to the review and analysis of relevant terms and conditions of transfers of certain assets pertaining to inverse floater structures were not operating effectively to appropriately determine whether the transfers of assets qualified for sale accounting under the provisions of Statement of Financial Accounting Standards No. 140, "Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities" ("SFAS 140"). As a result, these controls did not detect that certain transfers were not appropriately recorded as borrowings. Accordingly, the Registrant's schedule of investments as of and for the period ended October 31, 2006, were restated to appropriately reflect transfers of such securities as secured borrowings. These adjustments had no impact on net assets, net asset value per share or total return. Subsequent to October 31, 2006, but prior to the evaluation of the design and operation of the Registrant's disclosure controls and procedures at January 23, 2007, the Registrant's disclosure controls and procedures were modified to enhance the review and analysis of the relevant terms and conditions of transfers of securities in connection with inverse floater structures in light of SFAS 140. 2(b) - There have been no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal quarter of the period covered by this report that has materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. However, as discussed above, subsequent to October 31, 2006, the Registrant has enhanced controls related to the application of SFAS 140. Item 3 - Exhibits Certifications - Attached hereto 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. BlackRock MuniVest Fund, Inc. By: /s/ Robert C. Doll, Jr. ------------------------------- Robert C. Doll, Jr. Chief Executive Officer BlackRock MuniVest Fund, Inc. Date: January 23, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. ------------------------------- Robert C. Doll, Jr. Chief Executive Officer BlackRock MuniVest Fund, Inc. Date: January 23, 2007 By: /s/ Donald C. Burke ------------------------------- Donald C. Burke Chief Financial Officer BlackRock MuniVest Fund, Inc. Date: January 23, 2007