UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSRS CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-05227 Name of Fund: BlackRock Apex Municipal Fund, Inc. (APX) Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809 Name and address of agent for service: Donald C. Burke, Chief Executive Officer, BlackRock Apex Municipal 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: (800) 882-0052, Option 4 Date of fiscal year end: 06/30/2008 Date of reporting period: 07/01/2007 - 12/31/2007 Item 1 - Report to Stockholders EQUITIES FIXED INCOME REAL ESTATE LIQUIDITY ALTERNATIVES BLACKROCK SOLUTIONS BlackRock Apex Municipal BLACKROCK Fund, Inc. (APX) SEMI-ANNUAL REPORT DECEMBER 31, 2007 | (UNAUDITED) NOT FDIC INSURED MAY LOSE VALUE NO BANK GUARANTEE Table of Contents ================================================================================ Page -------------------------------------------------------------------------------- A Letter to Shareholders ................................................. 3 Semi-Annual Report: Fund Summary ............................................................. 4 Fund Financial Statements: Schedule of Investments ................................................ 5 Statement of Assets and Liabilities .................................... 10 Statement of Operations ................................................ 10 Statements of Changes in Net Assets .................................... 11 Financial Highlights ..................................................... 12 Notes to Financial Statements ............................................ 13 Officers and Directors ................................................... 16 Additional Information ................................................... 17 2 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 A Letter to Shareholders Dear Shareholder Financial markets endured heightened volatility during 2007, culminating in mixed results for some of the major benchmark indexes: Total Returns as of December 31, 2007 6-month 12-month ========================================================================================================== U.S. equities (S&P 500 Index) -1.37% + 5.49% ---------------------------------------------------------------------------------------------------------- Small cap U.S. equities (Russell 2000 Index) -7.53 - 1.57 ---------------------------------------------------------------------------------------------------------- International equities (MSCI Europe, Australasia, Far East Index) +0.39 +11.17 ---------------------------------------------------------------------------------------------------------- Fixed income (Lehman Brothers U.S. Aggregate Bond Index) +5.93 + 6.97 ---------------------------------------------------------------------------------------------------------- Tax-exempt fixed income (Lehman Brothers Municipal Bond Index) +3.22 + 3.36 ---------------------------------------------------------------------------------------------------------- High yield bonds (Lehman Brothers U.S. Corporate High Yield 2% Issuer Cap Index) -0.67 + 2.27 ---------------------------------------------------------------------------------------------------------- Past performance is no guarantee of future results. Index performance shown for illustrative purposes only. You cannot invest directly in an index. Subprime mortgage woes dominated headlines for much of 2007, spawning a widespread liquidity and credit crisis with ramifications across global markets. The Federal Reserve Board (the "Fed") stepped in to inject liquidity into the markets and bolster investor confidence, cutting the federal funds rate by 0.50% in September, 0.25% in October and 0.25% in December, which brought the target short-term interest rate to 4.25%. In taking action, the central bankers, who had long deemed themselves inflation fighters, were seeking to stem the fallout from the credit crunch and forestall a wider economic unraveling. Amid the volatility, equity markets displayed surprising resilience. Market fundamentals generally held firm, dividend payouts and share buybacks continued, and valuations remained attractive. To some extent, the credit turmoil dampened corporate merger-and-acquisition (M&A) activity, a key source of strength for equity markets, but 2007 remained a record year for global M&A nonetheless. As the returns indicate, the most recent six months were more trying, reflecting the slowing U.S. economy, a troubled housing market and a more difficult corporate earnings backdrop. Overall, large cap stocks outperformed small caps as investors grew increasingly risk averse. International markets fared better than their U.S. counterparts, benefiting from generally stronger economies. In fixed income markets, mixed economic signals and subprime fallout resulted in a flight to quality. Investors shunned bonds associated with the housing and credit markets in favor of higher-quality Treasury issues. The yield on 10-year Treasury issues, which touched 5.30% in June (its highest level in five years), fell to 4.04% by year-end, while prices correspondingly rose. The tax-exempt bond market waffled amid the economic uncertainty and concerns around the credit worthiness of bond insurers, but set a new-issuance record in 2007. A drop in municipal bond prices created buying opportunities, and the heightened supply was generally well absorbed. As you navigate the uncertainties inherent in the financial markets, we encourage you to start the year by reviewing your investment goals with your financial professional and making portfolio changes, as needed. For more reflection on 2007 and our 10 predictions for 2008, please ask your financial professional for a copy of "What's Ahead in 2008: An Investment Perspective," or view it online at www.blackrock.com/funds. As always, we thank you for entrusting BlackRock with your investment assets, and we look forward to continuing to serve you in the new year and beyond. Sincerely, /s/ Rob Kapito Rob Kapito President, BlackRock Advisors, LLC 3 THIS PAGE NOT PART OF YOUR FUND REPORT Fund Summary as of December 31, 2007 Investment Objective BlackRock Apex Municipal Fund, Inc. (APX) seeks to provide shareholders with high current income exempt from federal income taxes by investing primarily in a portfolio of medium- to lower-grade or unrated municipal obligations, the interest on which is exempt from federal income taxes in the opinion of bond counsel to the issuer. Fund Information Symbol on New York Stock Exchange ............................... APX Initial Offering Date ........................................... July 25, 1989 Yield on Closing Market Price as of December 31, 2007 ($9.23)* .. 6.37% Tax Equivalent Yield** .......................................... 9.80% Current Monthly Distribution per share of Common Stock*** ....... $.049 Current Annualized Distribution per share of Common Stock*** .... $.588 -------------------------------------------------------------------------------- * 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. ** Tax equivalent yield assumes the maximum federal tax rate of 35%. *** The distribution is not constant and is subject to change. The table below summarizes the changes in the Fund's market price and net asset value per share: -------------------------------------------------------------------------------- 12/31/07 6/30/07 Change High Low -------------------------------------------------------------------------------- Market Price ........... $9.23 $10.23 (9.78%) $10.45 $8.92 Net Asset Value ........ $9.54 $ 9.95 (4.12%) $ 9.96 $9.52 -------------------------------------------------------------------------------- The following charts show the Fund's portfolio composition and credit quality allocations of the Fund's long-term investments: Portfolio Composition Sector 12/31/07 6/30/07 -------------------------------------------------------------------------------- Hospital .................................................. 28% 31% Industrial & Pollution Control ............................ 26 29 City, County & State ...................................... 12 11 Tax Revenue ............................................... 8 9 Housing ................................................... 7 4 Power ..................................................... 6 3 Education ................................................. 4 5 Transportation ............................................ 4 3 Tobacco ................................................... 3 3 Water & Sewer ............................................. 1 1 Lease Revenue ............................................. 1 1 -------------------------------------------------------------------------------- Credit Quality Allocations* Credit Rating 12/31/07 6/30/07 -------------------------------------------------------------------------------- AAA/Aaa ................................................... 15% 8% AA/Aa ..................................................... 6 -- A/A ....................................................... 3 4 BBB/Baa ................................................... 18 21 BB/Ba ..................................................... 8 9 B/B ....................................................... 4 6 CCC/Caa ................................................... 5 5 CC/Ca ..................................................... 1 -- NR (Not Rated)** .......................................... 40 47 -------------------------------------------------------------------------------- * Using the higher of Standard & Poor's or Moody's Investor Services ratings. ** The Advisor has deemed certain of these non-related securities to be of investment grade quality. As of December 31, 2007 and June 30, 2007, the market value of these securities was $2,566,050 and $2,689,825, representing 1% and 1% of the Fund's long-term investments, respectively. 4 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Schedule of Investments as of December 31, 2007 (Unaudited) (in Thousands) Face Amount Municipal Bonds Value ========================================================================================= Alabama -- 0.6% $1,255 Tuscaloosa, Alabama, Special Care Facilities Financing Authority, Residential Care Facility Revenue Bonds (Capstone Village, Inc. Project), Series A, 5.875% due 8/01/2036 $ 1,159 ========================================================================================= Alaska -- 1.1% 2,000 Alaska Industrial Development and Expert Authority Revenue Bonds (Williams Lynxs Alaska Cargoport), AMT, 8% due 5/01/2023 2,052 ========================================================================================= Arizona -- 5.6% 900 Maricopa County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project 1), Series A, 6.625% due 7/01/2020 873 Maricopa County, Arizona, IDA, M/F Housing Revenue Bonds (Sun King Apartments Project), Series A: 30 5.875% due 11/01/2008 30 20 6% due 11/01/2010 20 1,020 6.75% due 5/01/2031 1,034 2,950 Phoenix, Arizona, IDA, Airport Facility, Revenue Refunding Bonds (America West Airlines Inc. Project), AMT, 6.30% due 4/01/2023 2,808 970 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series E, 7.25% due 7/01/203 11,024 Salt Verde Financial Corporation, Arizona, Senior Gas Revenue Bonds: 1,950 5% due 12/01/2032 1,844 2,730 5% due 12/01/2037 2,553 500 Yavapai County, Arizona, IDA, Hospital Facility Revenue Bonds (Yavapai Regional Medical Center), Series A, 6% due 8/01/2033 512 ========================================================================================= California -- 2.2% 1,300 California State, Various Purpose, GO, 5.25% due 11/01/2025 1,359 1,000 Fontana, California, Special Tax, Refunding (Community Facilities District Number 22 -- Sierra), 6% due 9/01/2034 987 3 San Jose, California, Airport Revenue Bonds, RIB, AMT, Series 102TP, 5.841% due 3/01/2017 (b)(f) 3 1,785 Southern California Public Power Authority, Natural Gas Project Number 1 Revenue Bonds, Series A, 5% due 11/01/2029 1,750 ========================================================================================= Colorado -- 4.4% 450 Colorado Health Facilities Authority, Revenue Refunding Bonds (Christian Living Communities Project), Series A, 5.75% due 1/01/2026 418 2,800 Elk Valley, Colorado, Public Improvement Revenue Bonds (Public Improvement Fee), Series A, 7.30% due 9/01/2022 2,910 1,235 North Range Metropolitan District Number 1, Colorado, GO, 7.25% due 12/15/2011 (a) 1,398 Plaza Metropolitan District Number 1, Colorado, Tax Allocation Revenue Bonds (Public Improvement Fees): 2,000 8% due 12/01/2025 2,132 500 8.125% due 12/01/2025 498 830 Southlands Metropolitan District Number 1, Colorado, GO, 7.125% due 12/01/2014 (a) 1,008 ========================================================================================= Connecticut -- 0.6% 490 Connecticut State Development Authority, Airport Facility Revenue Bonds (Learjet Inc. Project), AMT, 7.95% due 4/01/2026 546 640 Connecticut State, HFA, Housing Mortgage Finance Program Revenue Bonds, AMT, Sub-Series A-2, 5.15% due 5/15/2038 625 ========================================================================================= Florida -- 11.1% 800 Capital Projects Finance Authority, Florida, Continuing Care Retirement Revenue Bonds (Glenridge on Palmer Ranch), Series A, 8% due 6/01/2012 (a) 961 840 Halifax Hospital Medical Center, Florida, Hospital Revenue Refunding Bonds, Series A, 5% due 6/01/2038 767 850 Highlands County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), Series C, 5.25% due 11/15/2036 845 2,500 Hillsborough County, Florida, IDA, Exempt Facilities Revenue Bonds (National Gypsum Company), AMT, Series A, 7.125% due 4/01/2030 2,566 1,000 Jacksonville, Florida, Economic Development Commission, Health Care Facilities, Revenue Refunding Bonds (Florida Proton Therapy Institute), Series A, 6% due 9/01/2017 998 900 Jacksonville, Florida, Economic Development Commission, IDR (Gerdau Ameristeel US, Inc.), AMT, 5.30% due 5/01/2037 770 750 Lakewood Ranch, Florida, Community Development District Number 5, Special Assessment Revenue Refunding Bonds, Series A, 6.70% due 5/01/2011 (a) 829 1,810 Lee County, Florida, IDA, IDR (Lee Charter Foundation), Series A, 5.375% due 6/15/2037 1,542 Midtown Miami, Florida, Community Development District, Special Assessment Revenue Bonds, Series A: 1,500 6% due 5/01/2024 1,432 1,350 6.25% due 5/01/2037 1,306 1,520 Orlando, Florida, Urban Community Development District, Capital Improvement Special Assessment Bonds, Series A, 6.95% due 5/01/2011 (a) 1,681 2,140 Santa Rosa Bay Bridge Authority, Florida, Revenue Bonds, 6.25% due 7/01/2028 2,009 Portfolio Abbreviations To simplify the listings of BlackRock Apex Municipal Fund, Inc.'s portfolio holdings in the Schedule of Investments, we have abbreviated the names of many of the securities according to the list at right. AMT Alternative Minimum Tax (subject to) EDA Economic Development Authority GO General Obligation Bonds HDA Housing Development Authority HFA Housing Finance Agency IDA Industrial Development Authority IDR Industrial Development Revenue Bonds M/F Multi-Family PCR Pollution Control Revenue Bonds RIB Residual Interest Bonds VRDN Variable Rate Demand Notes BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 5 Schedule of Investments (continued) (in Thousands) Face Amount Municipal Bonds Value ========================================================================================= Florida (concluded) Sarasota County, Florida, Health Facilities Authority, Retirement Facility Revenue Refunding Bonds (Village on the Isle Project): $ 590 5.50% due 1/01/2027 $ 545 550 5.50% due 1/01/2032 489 2,385 Tampa Palms, Florida, Open Space and Transportation Community Development District Revenue Bonds, Capital Improvement (Richmond Place Project), 7.50% due 5/01/2018 2,399 1,850 Tolomato Community Development District, Florida, Special Assessment Bonds, 6.65% due 5/01/2040 1,790 ========================================================================================= Georgia -- 3.8% Atlanta, Georgia, Tax Allocation Bonds: 2,000 (Atlantic Station Project), 7.90% due 12/01/2011 (a) 2,361 495 (Princeton Lakes Project), 5.50% due 1/01/2031 472 Brunswick and Glynn County, Georgia, Development Authority, First Mortgage Revenue Bonds (Coastal Community Retirement Corporation Project), Series A (j): 830 7.125% due 1/01/2025 479 1,185 7.25% due 1/01/2035 685 1,580 Fulton County, Georgia, Development Authority, PCR, Refunding (General Motors Corporation), VRDN, 6.50% due 4/01/2010 (e) 1,580 1,680 Rockdale County, Georgia, Development Authority Revenue Bonds (Visy Paper Project), AMT, Series A, 6.125% due 1/01/2034 1,608 ========================================================================================= Idaho -- 0.8% 1,470 Idaho Health Facilities Authority, Revenue Refunding Bonds (Valley Vista Care Corporation), Series A, 7.75% due 11/15/2016 1,613 ========================================================================================= Illinois -- 6.2% 1,845 Caseyville, Illinois, Senior Tax Increment Revenue Bonds (Forest Lakes Project), 7% due 12/30/2022 1,700 2,860 Chicago, Illinois, O'Hare International Airport, Special Facility Revenue Refunding Bonds (American Airlines Inc. Project), 5.50% due 12/01/2030 2,449 Illinois State Finance Authority Revenue Bonds: 2,050 (Clare At Water Tower Project), Series A, 6.125% due 5/15/2038 1,933 430 (Landing At Plymouth Place Project), Series A, 6% due 5/15/2037 407 575 (Monarch Landing, Inc. Project), Series A, 7% due 12/01/2037 574 490 (Primary Health Care Centers Program), 6.60% due 7/01/2024 479 755 Lincolnshire, Illinois, Special Service Area Number 1, Special Tax Bonds (Sedgebrook Project), 6.25% due 3/01/2034 766 2,400 Lombard, Illinois, Public Facilities Corporation, First Tier Revenue Bonds (Conference Center and Hotel), Series A-1, 7.125% due 1/01/2036 2,500 265 Naperville, Illinois, IDR (General Motors Corporation), Refunding, VRDN, 6.50% due 12/01/2012 (e) 265 760 Village of Wheeling, Illinois, Revenue Bonds (North Milwaukee/Lake-Cook Tax Increment Financing Redevelopment Project), 6% due 1/01/2025 732 ========================================================================================= Indiana -- 1.9% 1,985 Indiana Health and Educational Facilities Financing Authority, Hospital Revenue Bonds (Community Foundation of Northwest Indiana), 5.50% due 3/01/2037 1,823 820 Vanderburgh County, Indiana, Redevelopment Commission, Redevelopment District Tax Allocation Bonds, 5.25% due 2/01/2031 775 Vigo County, Indiana, Hospital Authority Revenue Bonds (Union Hospital, Inc.): 440 5.70% due 9/01/2037 408 545 5.75% due 9/01/2042 499 ========================================================================================= Iowa -- 1.7% 2,635 Iowa Finance Authority, Health Care Facilities, Revenue Refunding Bonds (Care Initiatives Project), 9.25% due 7/01/2011 (a) 3,184 ========================================================================================= Kansas -- 0.6% 1,230 Wyandotte County, Kansas, Kansas City Unified Government Revenue Refunding Bonds (General Motors Corporation Project), 6% due 6/01/2025 1,160 ========================================================================================= Louisiana -- 1.7% 2,000 Louisiana Local Government Environmental Facilities and Community Development Authority Revenue Bonds (Westlake Chemical Corporation), 6.75% due 11/01/2032 1,983 1,300 Louisiana Public Facilities Authority, Hospital Revenue Bonds (Franciscan Missionaries of Our Lady Health System, Inc.), Series A, 5.25% due 8/15/2036 1,289 ========================================================================================= Maryland -- 1.2% 385 Baltimore, Maryland, Convention Center Hotel Revenue Bonds, Sub-Series B, 5.875% due 9/01/2039 384 1,500 Maryland State Energy Financing Administration, Limited Obligation Revenue Bonds (Cogeneration -- AES Warrior Run), AMT, 7.40% due 9/01/2019 1,503 410 Maryland State Health and Higher Educational Facilities Authority Revenue Bonds (Washington Christian Academy), 5.50% due 7/01/2038 365 ========================================================================================= Massachusetts -- 3.4% 1,845 Massachusetts State Development Finance Agency, First Mortgage Revenue Bonds (Overlook Communities Inc.), Series A, 6.25% due 7/01/2034 1,803 1,245 Massachusetts State Development Finance Agency, Revenue Refunding Bonds (Eastern Nazarene College), 5.625% due 4/01/2019 1,248 850 Massachusetts State Health and Educational Facilities Authority Revenue Bonds (Jordan Hospital), Series E, 6.75% due 10/01/2033 883 Massachusetts State Health and Educational Facilities Authority, Revenue Refunding Bonds: 1,245 (Bay Cove Human Services Issue), Series A, 5.90% due 4/01/2028 1,230 500 (Milton Hospital), Series, 5.50% due 7/01/2016 507 800 Massachusetts State Industrial Finance Agency Revenue Bonds, Sewer Facility (Resource Control Composting), AMT, 9.25% due 6/01/2010 813 ========================================================================================= Michigan -- 1.2% 1,150 Macomb County, Michigan, Hospital Finance Authority, Hospital Revenue Bonds (Mount Clemens General Hospital), Series B, 5.875% due 11/15/2034 1,128 6 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Schedule of Investments (continued) (in Thousands) Face Amount Municipal Bonds Value ========================================================================================= Michigan (concluded) $1,260 Monroe County, Michigan, Hospital Financing Authority, Hospital Revenue Refunding Bonds (Mercy Memorial Hospital Corporation), 5.50% due 6/01/2035 $ 1,128 ========================================================================================= Missouri -- 1.2% 1,155 Fenton, Missouri, Tax Increment Revenue Refunding and Improvement Bonds (Gravois Bluffs), 7% due 10/01/2011 (a) 1,314 1,000 Kansas City, Missouri, IDA, First Mortgage Health Facilities Revenue Bonds (Bishop Spencer Place), Series A, 6.50% due 1/01/2035 1,005 ========================================================================================= Nevada -- 0.2% 425 Clark County, Nevada, Improvement District Number 142, Special Assessment Bonds, 6.375% due 8/01/2023 437 ========================================================================================= New Hampshire -- 0.4% 835 New Hampshire Health and Education Facilities Authority, Hospital Revenue Bonds (Catholic Medical Center), 5% due 7/01/2036 756 ========================================================================================= New Jersey -- 12.2% 6,000 Camden County, New Jersey, Pollution Control Financing Authority, Solid Waste Resource Recovery, Revenue Refunding Bonds, AMT, Series A, 7.50% due 12/01/2010 6,015 2,170 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.50% due 6/15/2024 2,099 1,500 New Jersey EDA, IDR, Refunding (Newark Airport Marriott Hotel), 7% due 10/01/2014 1,530 New Jersey EDA, Retirement Community Revenue Bonds (a): 1,000 (Cedar Crest Village Inc. Facility), Series A, 7.25% due 11/15/2011 1,150 3,700 (Seabrook Village Inc.), Series A, 8.125% due 11/15/2010 4,226 New Jersey EDA, Special Facility Revenue Bonds (Continental Airlines Inc. Project), AMT: 3,050 6.625% due 9/15/2012 3,034 1,000 6.25% due 9/15/2029 935 1,870 New Jersey Health Care Facilities Financing Authority Revenue Bonds (Pascack Valley Hospital Association), 6.625% due 7/01/2036 1,009 2,760 New Jersey State Transportation Trust Fund Authority, Transportation System Revenue Bonds, Series C, 5.05% due 12/15/2035 (b)(d) 694 1,075 Tobacco Settlement Financing Corporation of New Jersey, Asset-Backed Revenue Bonds, 7% due 6/01/2013 (a) 1,262 1,270 Tobacco Settlement Financing Corporation of New Jersey, Asset-Backed Revenue Refunding Bonds, Series 1A, 5% due 6/01/2041 1,059 ========================================================================================= New Mexico -- 2.7% 5,000 Farmington, New Mexico, PCR, Refunding (Tucson Electric Power Company -- San Juan Project), Series A, 6.95% due 10/01/2020 5,087 ========================================================================================= New York -- 3.2% 1,000 Dutchess County, New York, IDA, Civic Facility Revenue Bonds (Saint Francis Hospital), Series B, 7.50% due 3/01/2029 1,061 New York City, New York, City IDA, Civic Facility Revenue Bonds: 350 Series C, 6.80% due 6/01/2028 368 830 (Special Needs Facility Pooled Program), Series C-1, 6.50% due 7/01/2024 827 1,730 New York City, New York, City IDA, Special Facility Revenue Bonds (British Airways Plc Project), AMT, 7.625% due 12/01/2032 1,817 630 New York Liberty Development Corporation Revenue Bonds (National Sports Museum Project), Series A, 6.125% due 2/15/2019 625 1,180 Westchester County, New York, IDA, Continuing Care Retirement, Mortgage Revenue Bonds (Kendal on Hudson Project), Series A, 6.50% due 1/01/2013 (a) 1,335 ========================================================================================= North Carolina -- 0.6% 1,000 North Carolina Medical Care Commission, Retirement Facilities, First Mortgage Revenue Bonds (Givens Estates Project), Series A, 6.50% due 7/01/2013 (a) 1,163 ========================================================================================= Ohio -- 0.7% 1,290 Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Bonds, Series A-2, 6.50% due 6/01/2047 1,325 ========================================================================================= Pennsylvania -- 7.7% 1,160 Bucks County, Pennsylvania, IDA, Retirement Community Revenue Bonds (Ann's Choice Inc.), Series A, 6.125% due 1/01/2025 1,163 1,750 Chester County, Pennsylvania, Health and Education Facilities Authority, Senior Living Revenue Refunding Bonds (Jenners Pond Inc. Project), 7.625% due 7/01/2012 (a) 2,078 600 Harrisburg, Pennsylvania, Authority, University Revenue Bonds (Harrisburg University of Science), Series B, 6% due 9/01/2036 593 Lancaster County, Pennsylvania, Hospital Authority Revenue Bonds (Brethren Village Project), Series A: 475 6.25% due 7/01/2026 472 410 6.50% due 7/01/2040 411 1,825 Montgomery County, Pennsylvania, Higher Education and Health Authority Revenue Bonds (Faulkeways at Gwynedd Project), 6.75% due 11/15/2009 (a) 1,965 1,700 Montgomery County, Pennsylvania, IDA, Revenue Bonds (Whitemarsh Continuing Care Project), 6.25% due 2/01/2035 1,669 Philadelphia, Pennsylvania, Authority for IDR: 1,600 (Air Cargo), AMT, Series A, 7.50% due 1/01/2025 1,674 4,460 Commercial Development, 7.75% due 12/01/2017 4,466 ========================================================================================= Rhode Island -- 1.0% 1,750 Central Falls, Rhode Island, Detention Facility Corporation, Detention Facility, Revenue Refunding Bonds, 7.25% due 7/15/2035 1,873 ========================================================================================= South Carolina -- 3.8% Connector 2000 Association, Inc., South Carolina, Toll Road and Capital Appreciation Revenue Bonds, Senior-Series B (d): 1,100 6.50% due 1/01/2009 1,025 1,075 7.969% due 1/01/2014 605 5,690 South Carolina Housing Finance and Development Authority, Mortgage Revenue Refunding Bonds, AMT, Series A-2, 5.15% due 7/01/2037 (b) 5,543 ========================================================================================= BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 7 Schedule of Investments (continued) (in Thousands) Face Amount Municipal Bonds Value ========================================================================================= Tennessee -- 3.1% $5,000 Knox County, Tennessee, Health, Educational and Housing Facilities Board, Hospital Facilities Revenue Refunding Bonds (Covenant Health), Series A, 5.03% due 1/01/2037 (d) $ 1,022 Shelby County, Tennessee, Health, Educational and Housing Facilities Board Revenue Bonds (Germantown Village): 245 6.25% due 12/01/2034 208 1,800 Series A, 7.25% due 12/01/2034 1,736 2,980 Sullivan County, Tennessee, Health, Educational and Housing Facilities Board, Hospital Revenue Bonds (Wellmont Health System Project), Series C, 5.25% due 9/01/2036 2,812 ========================================================================================= Texas -- 4.9% 1,000 Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises Inc.), First Tier, Series A, 6.70% due 1/01/2011 (a) 1,101 2,530 Brazos River Authority, Texas, PCR, Refunding (TXU Energy Company LLC Project), AMT, Series A, 7.70% due 4/01/2033 2,617 1,220 Brazos River Authority, Texas, Revenue Refunding Bonds (Reliant Energy Inc. Project), Series B, 7.75% due 12/01/2018 1,249 1,000 Houston, Texas, Health Facilities Development Corporation, Retirement Facility Revenue Bonds (Buckingham Senior Living Community), Series A, 7.125% due 2/15/2014 (a) 1,207 875 Kerrville, Texas, Health Facilities Development Corporation, Hospital Revenue Bonds (Sid Peterson Memorial Hospital Project), 5.375% due 8/15/2035 807 2,310 Matagorda County, Texas, Navigation District Number 1, Revenue Refunding Bonds (Reliant Energy Inc.), Series C, 8% due 5/01/2029 2,367 ========================================================================================= Utah -- 1.2% 2,240 Carbon County, Utah, Solid Waste Disposal, Revenue Refunding Bonds (Laidlaw Environmental), AMT, Series A, 7.45% due 7/01/2017 2,276 ========================================================================================= Virginia -- 2.1% 2,450 Dulles Town Center, Virginia, Community Development Authority, Special Assessment Tax (Dulles Town Center Project), 6.25% due 3/01/2026 2,464 310 Farms of New Kent Community Development Authority, Virginia, Special Assessment Bonds, Series C, 5.80% due 3/01/2036 279 1,500 Tobacco Settlement Financing Corporation of Virginia, Revenue Refunding Bonds, Senior Series B-1, 5% due 6/01/2047 1,245 ========================================================================================= Washington -- 0.6% 1,200 Washington State Housing Financing Commission, Nonprofit Revenue Bonds (Skyline at First Hill Project), Series A, 5.625% due 1/01/2038 1,080 ========================================================================================= West Virginia -- 0.6% 1,125 Princeton, West Virginia, Hospital Revenue Refunding Bonds (Community Hospital Association Inc. Project), 6.20% due 5/01/2013 1,122 ========================================================================================= Wisconsin -- 0.7% 1,320 Wisconsin State Health and Educational Facilities Authority Revenue Bonds (New Castle Place Project), Series A, 7% due 12/01/2031 1,342 ========================================================================================= U.S. Virgin Islands -- 1.2% 2,100 Virgin Islands Government Refinery Facilities, Revenue Refunding Bonds (Hovensa Coker Project), AMT, 6.50% due 7/01/2021 2,183 ========================================================================================= Total Municipal Bonds (Cost -- $180,130) -- 96.2% 181,975 ========================================================================================= Municipal Bonds Transferred to Tender Option Bond Trusts (i) ========================================================================================= California -- 1.7% 2,965 San Jose, California, Airport Revenue Refunding Bonds, Series A, 5.50% due 3/01/2032 (b) 3,095 ========================================================================================= Virginia -- 3.2% 6,010 Virginia State, HDA, Commonwealth Mortgage Revenue Bonds, Series H Sub-Series H-1, 5.375% due 7/01/2036 (c) 6,101 ========================================================================================= Total Municipal Bonds Transferred to Tender Option Bond Trusts (Cost -- $9,174) -- 4.9% 9,196 ========================================================================================= Shares Held Short-Term Securities ========================================================================================= 204 Merrill Lynch Institutional Tax-Exempt Fund, 3.35% (g)(h) 204 ========================================================================================= Total Short-Term Securities (Cost -- $204) -- 0.1% 204 ========================================================================================= Total Investments (Cost -- $189,508*) -- 101.2% 191,375 Other Assets Less Liabilities -- 1.2% 2,228 Liability for Trust Certificates, Including Interest Expense Payable -- (2.4%) (4,507) -------- Net Assets -- 100.0% $189,096 ======== 8 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Schedule of Investments (concluded) (in Thousands) * The cost and unrealized appreciation (depreciation) of investments as of December 31, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost ......................................... $184,654 ======== Gross unrealized appreciation .......................... $ 8,071 Gross unrealized depreciation .......................... (5,838) -------- Net unrealized appreciation ............................ $ 2,233 ======== (a) Prerefunded. (b) AMBAC Insured. (c) MBIA Insured. (d) Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase. (e) 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. (f) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (g) Represents the current yield as of December 31, 2007. (h) 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 204 $17 -------------------------------------------------------------------------- (i) 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. See Note 1 of the Notes to Financial Statements for details of municipal bonds transferred to tender option bond trusts. (j) Non-income producing security; issuer filed for bankruptcy or is in default of interest payments. See Notes to Financial Statements. BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 9 Statement of Assets and Liabilities of Operations As of December 31, 2007 (Unaudited) =============================================================================== Assets ------------------------------------------------------------------------------- Investments in unaffiliated securities, at value (identified cost -- $189,304,530) .......................... $ 191,171,161 Investments, in affiliated securities, at value (identified cost -- $203,567) .............................. 203,567 Cash ......................................................... 72,489 Receivables: Interest receivable ........................................ 3,229,957 Securities sold ............................................ 55,000 Prepaid expenses ............................................. 1,468 ------------- Total assets ................................................. 194,733,642 ------------- =============================================================================== Liabilities ------------------------------------------------------------------------------- Trust certificates* .......................................... 4,487,500 Payables: Securities purchased ....................................... 880,626 Investment advisor ......................................... 107,625 Dividends to shareholders .................................. 94,620 Interest expense ........................................... 19,154 Other affiliates ........................................... 1,708 Accrued expenses ............................................. 46,668 ------------- Total liabilities ............................................ 5,637,901 ------------- =============================================================================== Net Assets ------------------------------------------------------------------------------- Net Assets ................................................... $ 189,095,741 ============= =============================================================================== Capital ------------------------------------------------------------------------------- Common Stock, $.10 par value, 150,000,000 shares authorized; 19,821,674 shares issued and outstanding ................... $ 1,982,167 Paid-in capital in excess of par ............................. 200,873,492 Accumulated distributions in excess of investment income -- net .............................................. 1,411,166 Accumulated realized capital losses -- net ................... (17,037,715) Unrealized appreciation -- net ............................... 1,866,631 ------------- Total capital -- Equivalent to $9.54 net asset value per share of Common Stock (market price -- $9.23) .............. $ 189,095,741 ============= * Represents short-term floating rate certificates issued by tender option bond trusts. See Notes to Financial Statements. Statement of Operations For the Six Months Ended December 31, 2007 (Unaudited) =============================================================================== Investment Income ------------------------------------------------------------------------------- Interest ..................................................... $ 6,138,869 Dividends from affiliates .................................... 16,508 ------------- Total income ................................................. 6,155,377 ------------- =============================================================================== Expenses ------------------------------------------------------------------------------- Investment advisory fees ..................................... 630,489 Accounting services .......................................... 38,924 Professional fees ............................................ 25,729 Interest expense and fees .................................... 22,560 Transfer agent fees .......................................... 21,172 Printing and shareholder reports ............................. 19,419 Pricing fees ................................................. 9,606 Directors' fees and expenses ................................. 7,910 Custodian fees ............................................... 6,285 Listing fees ................................................. 4,854 Other ........................................................ 16,398 ------------- Total expenses before reimbursement .......................... 803,346 Reimbursement of expenses .................................... (932) ------------- Total expenses ............................................... 802,414 ------------- Investment income -- net ..................................... 5,352,963 ------------- =============================================================================== Realized & Unrealized Gain (Loss) -- Net ------------------------------------------------------------------------------- Realized gain (loss) on: Investments -- net ......................................... (199,292) Forward interest rate swaps -- net ......................... 52,638 ------------- Total realized loss -- net ................................... (146,654) ------------- Change in unrealized appreciation/depreciation on: Investments -- net ......................................... (7,758,509) Forward interest rate swaps -- net ......................... 178,595 ------------- Total change in unrealized appreciation/depreciation -- net .. (7,579,914) ------------- Total realized and unrealized loss -- net .................... (7,726,568) ------------- Net Decrease in Net Assets Resulting from Operations ......... $ (2,373,605) ============= See Notes to Financial Statements. 10 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Statements of Changes in Net Assets For the Six Months Ended For the December 31, Year Ended 2007 June 30, Increase (Decrease) in Net Assets: (Unaudited) 2007 =================================================================================================================================== Operations ----------------------------------------------------------------------------------------------------------------------------------- Investment income -- net ....................................................................... $ 5,352,963 $ 11,385,891 Realized loss -- net ........................................................................... (146,654) (3,091,653) Change in unrealized appreciation/depreciation -- net .......................................... (7,579,914) 4,418,732 ------------------------------- Net increase (decrease) in net assets resulting from operations ................................ (2,373,605) 12,712,970 ------------------------------- =================================================================================================================================== Dividends to Shareholders ----------------------------------------------------------------------------------------------------------------------------------- Investment income -- net ....................................................................... (5,822,417) (11,596,069) =================================================================================================================================== Common Stock Transactions ----------------------------------------------------------------------------------------------------------------------------------- Net increase in net assets derived from Common Stock issued to shareholders in reinvestment of dividends .................................................................... 465,409 1,063,048 =================================================================================================================================== Net Assets ----------------------------------------------------------------------------------------------------------------------------------- Total increase (decrease) in net assets ........................................................ (7,730,613) 2,179,949 Beginning of period ............................................................................ 196,826,354 194,646,405 ------------------------------- End of period* ................................................................................. $ 189,095,741 $ 196,826,354 =============================== * Undistributed investment income -- net ................................................... $ 1,411,166 $ 1,880,620 =============================== See Notes to Financial Statements. BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 11 For the Six Months Ended December 31, For the Year Ended June 30, The following per share data and ratios have been derived 2007 -------------------------------------------------------- from information provided in the financial statements. (Unaudited) 2007 2006 2005 2004 2003 =================================================================================================================================== Per Share Operating Performance ----------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ................ $ 9.95 $ 9.90 $ 9.82 $ 9.13 $ 8.99 $ 9.24 ---------------------------------------------------------------------- Investment income -- net*** ......................... .27 .58 .58 .58 .60 .58 Realized and unrealized gain (loss) -- net .......... (.39) .06 .08 .69 .11 (.27) ---------------------------------------------------------------------- Total from investment operations .................... (.12) .64 .66 1.27 .71 .31 ---------------------------------------------------------------------- Less dividends and distributions to Common Stock shareholders: Investment income -- net ........................ (.29) (.59) (.58) (.58) (.57) (.56) Realized gain -- net ............................ -- -- -- -- --** -- ---------------------------------------------------------------------- Total dividends and distributions to Common Stock shareholders ...................................... (.29) (.59) (.58) (.58) (.57) (.56) ---------------------------------------------------------------------- Net asset value, end of period ...................... $ 9.54 $ 9.95 $ 9.90 $ 9.82 $ 9.13 $ 8.99 ====================================================================== Market price per share, end of period ............... $ 9.23 $ 10.23 $ 10.25 $ 9.48 $ 8.26 $ 8.48 ====================================================================== =================================================================================================================================== Total Investment Return* ----------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share .................. (1.18%)++ 6.48% 7.00% 14.67% 8.64% 4.13% ====================================================================== Based on market price per share ..................... (7.01%)++ 5.73% 14.76% 22.36% 4.20% 8.18% ====================================================================== =================================================================================================================================== Ratios to Average Net Assets ----------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement and excluding interest expense and fees@ ................................. .80%+ .80% .80% .80% .79% .90% ====================================================================== Expenses, net of reimbursement ...................... .82%+ .80% .80% .80% .79% .90% ====================================================================== Expenses ............................................ .83%+ .80% .81% .80% .79% .90% ====================================================================== Investment income -- net ............................ 5.50%+ 5.75% 5.83% 6.11% 6.52% 6.56% ====================================================================== =================================================================================================================================== Supplemental Data ----------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ............ $189,096 $196,826 $194,646 $192,475 $178,983 $176,116 ====================================================================== Portfolio turnover .................................. 13% 22% 19% 22% 19% 24% ====================================================================== * 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. Total investment returns exclude the effects of sales charges. ** Amount is less than $(.01) per share. *** Based on average shares outstanding. + Annualized. ++ Aggregate total investment return. @ 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. See Notes to Financial Statements. 12 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Notes to Financial Statements (Unaudited) 1. Significant Accounting Policies: BlackRock Apex Municipal Fund, Inc. (the "Fund") is registered under the Investment Company Act of 1940, as amended (the "1940 Act"), as a non-diversified, closed-end management investment company. The Fund's financial statements are prepared in conformity with accounting principles generally accepted in the United States of America, which may require the use of management accruals and estimates. Actual results may differ from these estimates. These unaudited financial statements reflect all adjustments which are, in the opinion of management, necessary to present a fair statement of the results for the interim period. All such adjustments are of a normal, recurring nature. The Fund determines and makes available for publication the net asset value of its Common Stock on a daily basis. The Fund's Common Stock shares are listed on the New York Stock Exchange under the symbol APX. The following is a summary of significant accounting policies followed by the Fund. Valuation of Investments: Municipal investments (including commitments to purchase such investments on a "when-issued" basis) are valued on the basis of prices provided by dealers or pricing services selected under the supervision of the Fund's Board of Directors ("Directors" or a "Board"). In determining the value of a particular investment, pricing services may use certain information with respect to transactions in such investments, quotations from bond dealers, market transactions in comparable investments and various relationships between investments. Swap agreements are valued by quoted fair values received daily by the Fund's pricing service. Short-term securities may be valued at amortized cost. Investments in open-end investment companies are valued at net asset value each business day. In the event that application of these methods of valuation results in a price for an investment which is deemed not to be representative of the market value of such investment, the investment will be valued by, under the direction of or in accordance with a method approved by the Board as reflecting fair value ("Fair Value Assets"). When determining the price for Fair Value Assets, the investment advisor and/or sub-advisor shall seek to determine the price that the Fund might reasonably expect to receive from the current sale of that asset in an arms-length transaction. Fair value determinations shall be based upon all available factors that the advisor and/or sub-advisor deems relevant. The pricing of all Fair Value Assets shall be subsequently reported to the Board or a committee thereof. Derivative Financial Instruments: The Fund may engage in various portfolio investment strategies both to increase the return of the Fund and to hedge, or protect, its exposure to interest rate movements and movements in the securities markets. Losses may arise due to changes in the value of the contract or if the counterparty does not perform under the contract. The counterparty, for certain instruments, may pledge cash or securities as collateral. o Forward interest rate swaps: The Fund may enter into forward interest rate swaps. In a forward interest rate swap, the Fund and the counterparty agree to make periodic net payments on a specified notional contract amount, commencing on a specified future effective date, unless terminated earlier. Changes in the value of the forward interest rate swap are recognized as unrealized gains and losses. When the agreement is closed, the Fund records a realized gain or loss in an amount equal to the value of the agreement. The Fund generally intends to close each forward interest rate swap before the accrual date specified in the agreement and therefore avoid entering into the interest rate swap underlying each forward interest rate swap. Municipal Bonds Transferred to Tender Option Bond Trusts: The Fund invests in leveraged residual certificates ("TOB Residuals") issued by tender option bond trusts ("TOBs"). A TOB is established by a third party sponsor forming a special purpose entity, into which the Fund, or an agent on behalf of the Fund, transfers municipal securities. A TOB typically issues two classes of beneficial interests: short-term floating rate certificates, which are sold to third party investors, and residual certificates, which are generally issued to the Fund which made the transfer or to affiliates of the Fund. The Fund's transfers of the municipal securities to a TOB do not qualify for sale treatment under Statement of Financial Accounting Standards No. 140, "Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities" ("FAS 140"), therefore the municipal securities deposited into a TOB are presented in the Fund's schedule of investments and the proceeds from the transaction are reported as a liability for trust certificates of the Fund. Similarly, proceeds from residual certificates issued to affiliates, if any, from the transaction are included in the liability for trust certificates. Interest income from the underlying security is recorded by the Fund on an accrual basis. Interest expense incurred on the secured borrowing and other expenses related to remarketing, administration and trustee services to a TOB are reported as expenses of the Fund. The floating rate certificates have interest rates that generally reset weekly and their holders have the option to tender certificates to the TOB for redemption at par at each reset date. The residual interests held by the Fund include the right of the Fund (1) to cause the holders of a proportional share of the floating rate certificates to tender their certificates at par, and (2) to transfer a corresponding share of the municipal securities from the TOB to the Fund. At December 31, 2007, the aggregate value of the underlying municipal securities transferred to TOBs was $9,195,708, the related liability for trust certificates was $4,487,500 and the range of interest rates on the liability for trust certificates was 3.42% to 3.568%. Financial transactions executed through TOBs generally will underperform the market for fixed rate municipal bonds in a rising interest rate environment, but tend to outperform the market for fixed rate bonds when interest rates decline or remain relatively stable. Should short-term interest rates rise, the Fund's investments in TOB Residuals likely will adversely affect the Fund's investment income -- net and distributions to shareholders. BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 13 Notes to Financial Statements (continued) Fluctuations in the market value of municipal securities deposited into the TOB may adversely affect the Fund's net asset value per share. While the Fund's investment policies and restrictions expressly permit investments in inverse floating rate securities such as TOB Residuals, they generally do not allow the Fund to borrow money for purposes of making investments. The Fund's management believes that the Fund's restrictions on borrowings do not apply to the liability for trust certificates reflected as a result of the Fund's investments in TOB Residuals. Income Taxes: It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no federal income tax provision is required. Effective June 29, 2007, the Fund implemented Financial Accounting Standards Board ("FASB") Interpretation No. 48, "Accounting for Uncertainty in Income Taxes -- an interpretation of FASB Statement No. 109" ("FIN 48"). FIN 48 prescribes the minimum recognition threshold a tax position must meet in connection with accounting for uncertainties in income tax positions taken or expected to be taken by an entity, including investment companies, before being measured and recognized in the financial statements. Management has evaluated the application of FIN 48 to the Fund, and has determined that the adoption of FIN 48 does not have a material impact on the Fund's financial statements. The Fund files U.S. federal and various state and local tax returns. No income tax returns are currently under examination. The statute of limitations on the Fund's U.S. federal tax returns remains open for the years ended June 30, 2004 through June 30, 2007. The statute of limitations on the Fund's state and local tax returns may remain open for an additional year depending upon the jurisdiction. Investment Transactions and Investment Income: Investment transactions are recorded on the dates the transactions are entered into (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Interest income is recognized on the accrual basis. The Fund amortizes all premiums and discounts on debt securities. Dividends and Distributions: Dividends from net investment income are declared daily and paid monthly. Distributions of capital gains are recorded on the ex-dividend dates. Recent Accounting Pronouncements: In September 2006, Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements.The impact on the Fund's financial statement disclosures, if any, is currently being assessed. In addition, in February 2007, FASB issued Statement of Financial Accounting Standards No. 159, "The Fair Value Option for Financial Assets and Financial Liabilities" ("FAS 159"), was issued and is effective for fiscal years beginning after November 15, 2007. Early adoption is permitted as of the beginning of a fiscal year that begins on or before November 15, 2007, provided the entity also elects to apply the provisions of FAS 157. FAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fail value. FAS 159 also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. The impact on the Fund's financial statement disclosures, if any, is currently being assessed. 2. Investment Advisory Agreement and Transactions with Affiliates: The Fund has entered into an Investment Advisory Agreement with BlackRock Advisors, LLC (the "Advisor"), an indirect, wholly owned subsidiary of BlackRock, Inc. Merrill Lynch & Co., Inc. and The PNC Financial Services Group, Inc. are the principal owners of BlackRock, Inc. The Advisor is responsible for the management of the Fund's portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Fund. For such services, the Fund pays a monthly fee at an annual rate of .65% of the Fund's average daily net assets. The Advisor has agreed to reimburse its management fee by the amount of management fees the Fund pays to the Advisor indirectly through its investment in Merrill Lynch Institutional Tax-Exempt Fund. For the six months ended December 31, 2007, the Advisor reimbursed the Fund $932. In addition, the Advisor has entered into a sub-advisory agreement with BlackRock Investment Management, LLC, an affiliate of the Advisor, under which the Advisor pays the sub-advisor for services it provides, a monthly fee that is a percentage of the management fee paid by the Fund to the Advisor. For the six months ended December 31, 2007, the Fund reimbursed the Advisor $1,705 for certain accounting services. Certain officers and/or directors of the Fund are officers and/or directors of BlackRock, Inc. or its affiliates. 14 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Notes to Financial Statements (concluded) 3. Investments: Purchases and sales of investments, excluding short-term securities, for the six months ended December 31, 2007 were $27,615,373 and $25,607,866, respectively. 4. Common Stock Transactions: At December 31, 2007, the Fund had one class of shares of Common Stock, par value $.10 per share, of which 150,000,000 shares were authorized. Shares issued and outstanding for the six months ended December 31, 2007 increased by 47,456 as a result of dividend reinvestment. Shares issued and outstanding for the year ended June 30, 2007 increased by 104,307 as a result of dividend reinvestment. 5. Capital Loss Carryforward: On June 30, 2007, the Fund had a net capital loss carryforward of $16,891,061, of which $2,542,361 expires in 2008, $5,341,699 expires in 2009, $2,075,987 expires in 2010, $2,163,492 expires in 2011, $1,659,281 expires in 2012, $35,292 expires in 2013 and $3,072,949 expires in 2015. This amount will be available to offset like amounts of any future taxable gains. 6. Concentration Risk: The Fund concentrates its investments in securities issued by state agencies, other governmental entities and U.S. Territories. The Fund is more susceptible to adverse financial, social, environmental, economic, regulatory and political factors that may affect these state agencies, other governmental entities and U.S. Territories, which could seriously affect the ability of these states and their municipal subdivisions to meet continuing obligations for principal and interest payments and therefore could impact the value of the Fund's investments and net asset value per share, than if the Fund was not concentrated in securities issued by state agencies, other governmental entities and U.S. Territories. Many municipalities insure repayment of their obligations. Although bond insurance reduces the risk of loss due to default by an issuer, such bonds remain subject to the risk that market value may fluctuate for other reasons and there is no assurance that the insurance company will meet its obligations. These securities have been identified in the Schedule of Investments. 7. Subsequent Event: The Fund paid a tax-exempt dividend to holders of Common Stock in the amount of $.049000 per share on February 1, 2008 to shareholders of record on January 15, 2008. BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 15 Officers and Directors G. Nicholas Beckwith, III, Director Richard E. Cavanagh, Director Richard S. Davis, Director Kent Dixon, Director Frank J. Fabozzi, Director Kathleen F. Feldstein, Director James T. Flynn, Director Henry Gabbay, Director Jerrold B. Harris, Director R. Glenn Hubbard, Director W. Carl Kester, Director Karen P. Robards, Director Robert S. Salomon, Jr., Director Roscoe S. Suddarth, Advisory Board Member* Donald C. Burke, Fund President and Chief Executive Officer Anne F. Ackerley, Vice President Neal J. Andrews, Chief Financial Officer Jay M. Fife, Treasurer Brian P. Kindelan, Chief Compliance Officer Howard Surloff, Secretary * Roscoe S. Suddarth resigned from the Advisory Board of the Fund, effective December 31, 2007. Custodian The Bank of New York Mellon New York, NY 10286 Transfer Agent The Bank of New York Mellon New York, NY 10286 Accounting Agent State Street Bank and Trust Company Princeton, NJ 08540 Independent Registered Public Accounting Firm Deloitte & Touche LLP Princeton, NJ 08540 Legal Counsel Skadden, Arps, Slate Meagher & Flom LLP New York, NY 10036 16 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Additional Information Proxy Results During the six-month period ended December 31, 2007, shareholders of BlackRock Apex Municipal Fund, Inc. voted on the following proposal, which was approved at an annual shareholders' meeting on August 16, 2007. This proposal was part of the reorganization of the Fund's Board of Directors which took effect on November 1, 2007. A description of the proposal and number of shares voted are as follows: --------------------------------------------------------------------------------------------------- Shares Voted Shares Withheld For From Voting --------------------------------------------------------------------------------------------------- To elect the Fund's Directors: G. Nicholas Beckwith, III 16,960,625 331,064 Richard E. Cavanagh 16,967,858 323,831 Richard S. Davis 16,961,880 329,809 Kent Dixon 16,966,218 325,471 Frank J. Fabozzi 16,967,180 324,509 Kathleen F. Feldstein 16,955,080 336,609 James T. Flynn 16,965,190 326,499 Henry Gabbay 16,968,658 323,031 Jerrold B. Harris 16,960,143 331,546 R. Glenn Hubbard 16,967,971 323,718 W. Carl Kester 16,967,180 324,509 Karen P. Robards 16,964,089 327,600 Robert S. Salomon, Jr. 16,965,348 326,341 --------------------------------------------------------------------------------------------------- Dividend Policy The Fund's dividend policy is to distribute all or a portion of its net investment income to its shareholders on a monthly basis. In order to provide shareholders with a more stable level of dividend distributions, the Fund may at times pay out less than the entire amount of net investment income earned in any particular month and may at times in any particular month pay out such accumulated but undistributed income in addition to net investment income earned in that month. As a result, the dividends paid by the Fund for any particular month may be more or less than the amount of net investment income earned by the Fund during such month. The Fund's current accumulated but undistributed net investment income, if any, is disclosed in the Statement of Assets and Liabilities, which comprises part of the financial information included in this report. Swap Agreements The Fund may invest in swap agreements, which are over-the-counter contracts in which one party agrees to make periodic payments based on the change in market value of a specified bond, basket of bonds, or index in return for periodic payments based on a fixed or variable interest rate or the change in market value of a different bond, basket of bonds or index. Swap agreements may be used to obtain exposure to a bond or market without owning or taking physical custody of securities. Swap agreements involve the risk that the party with whom the Fund has entered into a swap will default on its obligation to pay the Fund and the risk that the Fund will not be able to meet its obligations to pay the other party to the agreement. The swap agreements in which the Fund may invest includes credit default swap agreements. BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 17 Additional Information (continued) Availability of Quarterly Schedule of Investments The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Fund's Forms N-Q are available on the SEC's website at http://www.sec.gov. The Fund's Forms N-Q may also be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling (800) SEC-0330. The Fund's Forms N-Q may also be obtained upon request and without charge by calling (800) 441-7762. Electronic Delivery Electronic copies of most financial reports are available on the Fund's website. Shareholders can sign up for e-mail notifications of quarterly statements and annual and semi-annual reports by enrolling in the Fund's electronic delivery program. Shareholders Who Hold Accounts with Investment Advisors, Banks or Brokerages: Please contact your financial advisor to enroll. Please note that not all investment advisors, banks or brokerages may offer this service. General Information The Fund does not make available copies of its Statements of Additional Information because the Fund's shares are not continuously offered, which means that the Statement of Additional Information of the Fund has not been updated after completion of the Fund's offering and the information contained in the Fund's Statement of Additional Information may have become outdated. During the period, there were no material changes in the Fund's investment objective or policies or to the Fund's character or by-laws that were not approved by the shareholders or in the principal risk factors associated with investment in the Fund. There have been no changes in the persons who are primarily responsible for the day-to-day management of the Fund's portfolio. 18 BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 Additional Information (concluded) BlackRock Privacy Principles BlackRock is committed to maintaining the privacy of its current and former fund investors and individual clients (collectively, "Clients") and to safeguarding their non-public personal information. The following information is provided to help you understand what personal information BlackRock collects, how we protect that information and why in certain cases we share such information with select parties. If you are located in a jurisdiction where specific laws, rules or regulations require BlackRock to provide you with additional or different privacy-related rights beyond what is set forth below, then BlackRock will comply with those specific laws, rules or regulations. BlackRock obtains or verifies personal non-public information from and about you from different sources, including the following: (i) information we receive from you or, if applicable, your financial intermediary, on applications, forms or other documents; (ii) information about your transactions with us, our affiliates, or others; (iii) information we receive from a consumer reporting agency; and (iv) from visits to our websites. BlackRock does not sell or disclose to non-affiliated third parties any non-public personal information about its Clients, except as permitted by law or as is necessary to respond to regulatory requests or to service Client accounts. These non-affiliated third parties are required to protect the confidentiality and security of this information and to use it only for its intended purpose. We may share information with our affiliates to service your account or to provide you with information about other BlackRock products or services that may be of interest to you. In addition, BlackRock restricts access to non-public personal information about its Clients to those BlackRock employees with a legitimate business need for the information. BlackRock maintains physical, electronic and procedural safeguards that are designed to protect the non-public personal information of its Clients, including procedures relating to the proper storage and disposal of such information. BLACKROCK APEX MUNICIPAL FUND, INC. DECEMBER 31, 2007 19 This report, including the financial information herein, is transmitted to shareholders of BlackRock Apex Municipal Fund, Inc. for their information. It is not a prospectus. Past performance results shown in this report should not be considered a representation of future performance. Statements and other information herein are as dated and are subject to change. A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free (800) 441-7762; (2) at www.blackrock.com; and (3) on the Securities and Exchange Commission's website at http://www.sec.gov. Information about how the Fund voted proxies relating to securities held in the Fund's portfolio during the most recent 12-month period ended June 30 is available upon request and without charge (1) at www.blackrock.com or by calling (800) 441-7762 and (2) on the Securities and Exchange Commission's website at http://www.sec.gov. BlackRock Apex Municipal Fund, Inc. 100 Bellevue Parkway Wilmington, DE 19809 BLACKROCK #10955-12/07 Item 2 - Code of Ethics - Not Applicable to this semi-annual report Item 3 - Audit Committee Financial Expert - Not Applicable to this semi-annual report Item 4 - Principal Accountant Fees and Services - Not Applicable to this semi-annual report Item 5 - Audit Committee of Listed Registrants - Not Applicable to this semi-annual report Item 6 - Schedule of Investments - The registrant's Schedule of Investments is included as part of the Report to Stockholders filed under Item 1 of this form. Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable to this semi-annual report Item 8 - Portfolio Managers of Closed-End Management Investment Companies - Not Applicable to this semi-annual report Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - The registrant's Nominating and Governance Committee will consider nominees to the Board recommended by shareholders when a vacancy becomes available. Shareholders who wish to recommend a nominee should send nominations which include biographical information and set forth the qualifications of the proposed nominee to the registrant's Secretary. There have been no material changes to these procedures. Item 11 - Controls and Procedures 11(a) - The registrant's principal executive and principal financial officers or persons performing similar functions have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act")) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended. 11(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - Not Applicable to this semi-annual report 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - 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 Apex Municipal Fund, Inc. By: /s/ Donald C. Burke ------------------- Donald C. Burke Chief Executive Officer of BlackRock Apex Municipal Fund, Inc. Date: February 21, 2008 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/ Donald C. Burke ------------------- Donald C. Burke Chief Executive Officer (principal executive officer) of BlackRock Apex Municipal Fund, Inc. Date: February 21, 2008 By: /s/ Neal J. Andrews ------------------- Neal J. Andrews Chief Financial Officer (principal financial officer) of BlackRock Apex Municipal Fund, Inc. Date: February 21, 2008