UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-5011 Name of Fund: CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Terry K. Glenn, President, CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust, 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: 03/31/04 Date of reporting period: 04/01/03 - 09/30/03 Item 1 - Attach shareholder report (BULL LOGO) Merrill Lynch Investment Managers www.mlim.ml.com CMA Pennsylvania Municipal Money Fund Semi-Annual Report September 30, 2003 This report is not authorized for use as an offer of sale or a solicitation of an offer to buy shares of the Fund unless accompanied or preceded by the Fund's current prospectus. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. Past performance results shown in this report should not be considered a representation of future performance, which will fluctuate. Statements and other information herein are as dated and are subject to change. CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust Box 9011 Princeton, NJ 08543-9011 CMA Pennsylvania Municipal Money Fund Officers and Trustees Terry K. Glenn--President and Trustee Ronald W. Forbes--Trustee Cynthia A. Montgomery--Trustee Charles C. Reilly--Trustee Kevin A. Ryan--Trustee Roscoe S. Suddarth--Trustee Richard R. West--Trustee Edward D. Zinbarg--Trustee Kenneth A. Jacob--Senior Vice President John M. Loffredo--Senior Vice President Darrin J. SanFillippo--Vice President Donald C. Burke--Vice President and Treasurer Phillip S. Gillespie--Secretary Custodian State Street Bank and Trust Company P.O. Box 351 Boston, MA 02101 Transfer Agent Financial Data Services, Inc. 4800 Deer Lake Drive East Jacksonville, FL 32246-6484 800-221-7210* *For inquiries regarding your CMA account, call 800-CMA-INFO (800-262-4636). CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 A Letter From the President Dear Shareholder Now in its final quarter, 2003 has been a meaningful year in many respects. After one of the most significant equity market downturns in many investors' memories, this year finally brought hopeful signs for a sustainable economic recovery. Sub par economic growth of 1.4% in the first quarter of 2003 increased to projected growth of more than 4% in the second half of the year. With that good news, fixed income investments, which had become the asset class of choice during the long equity market decline, faced new challenges. The Federal Reserve Board continued its accommodative monetary policy, lowering the Federal Funds rate in June to 1%, its lowest level since 1958. With this move, the short end of the yield curve remained relatively flat and it became increasingly difficult to find attractive income opportunities. Through September 30, 2003, both the Bond Market Association (BMA) Index and the one-year Municipal Market Data (MMD) Index averaged 1.03% for the year. Rates on the BMA Index, which measures the shortest end of the yield curve, averaged .85% during the third quarter versus 1.16% in the second quarter. Rates on the one-year MMD Index averaged .98% in the third quarter, just below the second quarter average of 1%. Against this backdrop, our portfolio managers continued to work diligently to maximize tax-exempt returns consistent with the preservation of capital. With that said, remember also that the advice and guidance of a skilled financial advisor often can help you choose those investments that will best serve you as you plan for your financial future. Finally, I am proud to premiere a new look to our shareholder communications. Our portfolio manager commentaries have been trimmed and organized in such a way that you can get the information you need at a glance, in plain language. Today's markets are confusing enough. We want to help you put it all in perspective. The report's new size also allows us certain mailing efficiencies. Any cost savings in production or postage are passed on to the Fund and, ultimately, to Fund shareholders. We thank you for trusting Merrill Lynch Investment Managers with your investment assets, and we look forward to serving you in the months and years ahead. Sincerely, (Terry K. Glenn) Terry K. Glenn President and Trustee CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 A Discussion With Your Fund's Portfolio Manager With interest rates low and expected to remain that way for some time, we looked increasingly to the higher yields offered by fixed rate notes during the period. How did the Fund perform during the period in light of the existing market conditions? For the six-month period ended September 30, 2003, CMA Pennsylvania Municipal Money Fund paid shareholders a net annualized yield of ..43%.* As of September 30, 2003, the Fund's seven-day yield was ..46%. The Federal Reserve Board cut the Federal Funds rate once more during the six-month period, sending interest rates to their lowest levels in almost 50 years. Despite indications that the economy was strengthening gradually, the Federal Reserve Board emphasized its concern that deflation was a bigger threat to the economy than inflation, and reassured investors that it planned to keep short- term interest rates low until consistent growth in the economy and employment was evident. The expectation for a stable short-term interest rate environment created a strong demand for fixed rate notes with maturities of six months - one year. This caused yields on these notes to fall later in the period and somewhat flattened the yield curve when compared to variable rate demand securities. However, our aggressive pursuit of fixed rate notes earlier in the period enabled us to lock in a favorable spread above variable rate securities. This strategy enhanced the performance of the Fund during the six-month period. *Based on a constant investment throughout the period, with dividends compounded daily, and reflecting a net return to the investor after all expenses. Describe conditions in the Commonwealth of Pennsylvania during the period. Pennsylvania's economy remained weak for most of the past six months, but began to show some signs of recovery in the latter half of the period. In August and September, for example, the Philadelphia Federal Reserve Business Outlook Survey showed notable improvement. September's indicators suggested Pennsylvania's manufacturing sector improved for the third consecutive month as firms reported continued growth in new orders and shipments. Expectations for future growth also appeared favorable. As fiscal year 2003 ended, the commonwealth was forced to close a $700 million revenue shortfall. This was accomplished through spending cuts and the use of nonrecurring revenues, such as tobacco settlement funds. How did you manage the Fund during the period? In the first half of the period, yields declined from already low levels as investors worried about the potential for deflation and its impact on Federal Reserve Board monetary policy. The falling yields happened to coincide with very modest issuance of new Pennsylvania short-term fixed rate securities. Although we participated in a handful of opportunities--mostly secondary market notes and put bonds with maturities of one year--we were not able to extend the Fund's average portfolio maturity as much as we would have liked. Also affecting performance was the maturity of notes purchased the previous year. As these issues matured, we reinvested the proceeds at prevailing yields, 80 basis points - 90 basis points (.80% - .90%) lower than the securities rolling off the portfolio. Conditions improved somewhat in the second half of the period when we saw an increase in municipal supply. During this time, we added longer-term, higher-yielding fixed paper to the portfolio when prudent, purchasing approximately $30 million in fixed notes with yields of 1% or more. The ability to lock in these rates helped the Fund's performance during the period. During most of the past six months, we looked to maintain a larger percentage of fixed rate paper than our peers. Early in the period, however, we were careful to keep enough of the Fund's assets in short-maturity holdings to handle anticipated tax-time shareholder redemptions and to take advantage of the expected increase in yields on these securities. During September, municipal issuance picked up. This coincided with the end of the quarter, when brokers typically offer variable paper at somewhat more attractive yields. As a result, we increasingly took inflows of cash and made investments in this area. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 How would you characterize the portfolio's position at the close of the period? The Fund ended the period with an average portfolio maturity of 45 days compared to the average of 35 days for funds in its iMoneyNet, Inc. category. This compared to an average life of 42 days at the beginning of the period, 15 days longer than the iMoneyNet group's average maturity. As of September 30, 2003, the Fund had $501.2 million in net assets, a 16% decline from March 31, 2003. We continue to take a relatively neutral approach to the Pennsylvania short-term municipal market, given our expectation that the Federal Reserve Board will leave interest rates unchanged for the foreseeable future. In the months ahead, we will continue to monitor developments in the national and Pennsylvania economies, maintaining our basic investment strategy while shifting the Fund's allocation between fixed and variable rate notes in what we believe are the best interests of our shareholders. We also will keep a watchful eye on the Federal Reserve Board's monetary policy and stand ready to respond with changes to our investment approach as needed. Moreover, with a majority of fixed rate issuance behind us, we anticipate the short-term tax-exempt yield curve will remain relatively flat for the near term. Thus, unless the economy changes course and is weak enough to generate another cut in the Federal Funds interest rate, we expect to purchase fewer fixed rate securities than we did in the current period. Darrin J. San Fillippo Vice President and Portfolio Manager October 9, 2003 CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Schedule of Investments (In Thousands) Face State Amount Municipal Bonds Value Pennsylvania-- ABN AMRO Munitops Certificates Trust, VRDN (d): 99.5% $ 3,760 GO, Series 2001-18, 1.15% due 10/01/2009 (c) $ 3,760 8,450 Refunding, Series 2003-20, 1.15% due 7/15/2011 (c) 8,450 21,879 Series 1999-16, 1.15% due 3/07/2007 (b) 21,879 14,455 Allegheny County, Pennsylvania, GO, Series C-51, 1.30% due 5/03/2004 14,455 Allegheny County, Pennsylvania, Hospital Development Authority Revenue Bonds (Presbyterian University Hospital), ACES, VRDN (d): 3,775 Series B-1, 1.15% due 3/01/2018 3,775 930 Series B-2, 1.15% due 3/01/2018 930 4,250 Series B-3, 1.15% due 3/01/2018 4,250 14,715 Allegheny County, Pennsylvania, IDA, Health and Housing Facilities Revenue Refunding Bonds (Longwood at Oakmont Inc.), VRDN, Senior Series B, 1.20% due 7/01/2027 (d) 14,715 Allegheny County, Pennsylvania, IDA, Revenue Bonds, VRDN (d): 3,025 (The Bradley Center), Series A, 1.17% due 11/01/2014 3,025 5,000 (Western Pennsylvania School for the Blind), 0.85% due 7/01/2004 5,000 Allegheny County, Pennsylvania, IDA, Revenue Refunding Bonds, VRDN (d): 7,515 (Commercial Development-Parkway Center Project), Series A, 1.14% due 5/01/2009 7,515 6,500 MERLOTS, Series A-48, 1.15% due 9/01/2011 (a) 6,500 1,620 Beaver County, Pennsylvania, IDA, IDR (Standard Steel Specialty), VRDN, 1.23% due 12/03/2007 (d) 1,620 Berks County, Pennsylvania, IDA, Manufacturing Facilities Revenue Bonds, VRDN, AMT (d): 1,025 (Berks Products Corporation), 1.20% due 8/01/2006 1,025 4,810 (Ram Industries Inc. Project), 1.25% due 12/01/2011 4,810 2,690 Berks County, Pennsylvania, IDA, Revenue Bonds (World Electronics Sales), VRDN, AMT, 1.25% due 8/01/2016 (d) 2,690 2,800 Bethel Park, Pennsylvania, School District, GO, TRAN, 1.60% due 6/30/2004 2,811 400 Bethel Township, Pennsylvania, IDA, IDR (Brentwood Industries Inc. Project), VRDN, AMT, 1.20% due 11/01/2011 (d) 400 5,900 Blair County, Pennsylvania, IDA, Revenue Bonds (NPC Inc. Project), VRDN, AMT, 1.22% due 9/01/2017 (d) 5,900 2,500 Boyertown, Pennsylvania, Area School District, GO, TRAN, 1.50% due 6/30/2004 2,507 3,135 Bradford County, Pennsylvania, IDA, EDR (Towanda Printing Company), VRDN, AMT, 1.22% due 9/01/2016 (d) 3,135 2,410 Bradford County, Pennsylvania, IDA, Revenue Bonds (State Aggregates Inc. Project), VRDN, AMT, 1.25% due 2/01/2015 (d) 2,410 Bucks County, Pennsylvania, IDA, Revenue Bonds, VRDN, AMT (d): 4,145 (Bracalentes Manufacturing Company Inc. Project), 1.25% due 6/01/2016 4,145 4,500 (Harsco Corporation Project), 1.25% due 8/01/2011 4,500 3,740 (L&P Properties LP Project), Series A, 1.35% due 6/01/2014 3,740 735 (Specialty Ring Products Inc.), 1.25% due 10/01/2009 735 6,500 Bucks County, Pennsylvania, TRAN, 2% due 12/31/2003 6,514 Butler County, Pennsylvania, IDA, Revenue Bonds (Concordia Lutheran Ministers), VRDN (d): 3,750 Series A, 1.30% due 4/01/2004 3,750 3,000 Series B, 1.10% due 8/01/2004 3,000 4,535 Series C, 1.60% due 10/01/2030 4,535 2,155 Carbondale, Pennsylvania, IDA, IDR (JM Wells Company LP Project), VRDN, AMT, 1.25% due 9/01/2015 (d) 2,155 Portfolio Abbreviations for CMA Pennsylvania Municipal Money Fund ACES SM Adjustable Convertible Extendible Securities AMT Alternative Minimum Tax (subject to) CP Commercial Paper EDR Economic Development Revenue Bonds FLOATS Floating Rate Securities GO General Obligation Bonds HFA Housing Finance Agency IDA Industrial Development Authority IDR Industrial Development Revenue Bonds MERLOTS Municipal Extendible Receipt Liquidity Option Tender Securities MSTR Municipal Securities Trust Receipts PCR Pollution Control Revenue Bonds PUTTERS Puttable Tax-Exempt Receipts S/F Single Family TRAN Tax Revenue Anticipation Notes UPDATES Unit Price Adjustable Tax-Exempt Securities VRDN Variable Rate Demand Notes CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Schedule of Investments (continued) (In Thousands) Face State Amount Municipal Bonds Value Pennsylvania $ 5,435 Chester County, Pennsylvania, IDA, Revenue Bonds (West Vincent Association), VRDN, (continued) AMT, Series B, 1.25% due 12/01/2020 (d) $ 5,435 1,325 Crawford County, Pennsylvania, IDA (Heatrix Inc. Project), VRDN, AMT, Series A, 1.23% due 11/01/2017 (d) 1,325 3,360 Dauphin County, Pennsylvania, IDA, Revenue Bonds (Interconnection System Project), VRDN, AMT, 1.13% due 1/01/2014 (d) 3,360 2,000 Delaware County, Pennsylvania, Authority Revenue Bonds (Widener University Inc.), VRDN, 1.12% due 7/01/2014 (d) 2,000 10,000 Delaware County, Pennsylvania, IDA (Exelon Generating), CP, Series 2001-A, 1.10% due 10/09/2003 10,000 2,350 Delaware County, Pennsylvania, IDA, PCR (BP Oil Inc. Project), UPDATES, VRDN, 1.22% due 12/01/2009 (d) 2,350 4,300 Eagle Tax-Exempt Trust, Pennsylvania, GO, VRDN, Series 94, Class 3803, 1.15% due 5/01/2008 (d) 4,300 5,940 Eagle Tax-Exempt Trust, Pennsylvania, VRDN, Series 96-C, Class 3801, 1.15% due 5/01/2014 (d) 5,940 6,100 Emmaus, Pennsylvania, General Authority Revenue Bonds, VRDN, Series A, 1.09% due 3/01/2024 (d) 6,100 1,430 Erie County, Pennsylvania, Industrial Development (Reed Manufacturing Corp. Project), VRDN, AMT, 1.23% due 6/01/2006 (d) 1,430 1,990 Erie, Pennsylvania, Higher Education Building Authority, University Revenue Bonds (Gannon University Project), VRDN, Series F, 1.40% due 7/01/2013 (d) 1,990 1,100 Geisinger, Pennsylvania, Health System Authority Revenue Bonds (Geisinger Health System), VRDN, 1.10% due 11/15/2032 (d) 1,100 1,735 Greene County, Pennsylvania, IDA, Revenue Bonds (Manufacturing Facilities--Kyowa America), VRDN, AMT, Series D, 1.22% due 7/01/2014 (d) 1,735 5,535 Grove City, Pennsylvania, Area Hospital Authority, Health Care Facility Revenue Bonds (John XXIII Home Project), VRDN, 1.17% due 2/01/2030 (d) 5,535 915 Hampden, Pennsylvania, IDA, Revenue Refunding Bonds (Pennsylvania Pipe Inc.), VRDN, AMT, 1.25% due 12/01/2014 (d) 915 4,000 Harrisburg, Pennsylvania, School Authority Revenue Bonds (Harrisburg Project), VRDN, 0.99% due 12/01/2027 (a)(d) 4,000 7,600 Huntingdon County, Pennsylvania, General Authority, College Revenue Bonds (Juniata College Project), VRDN, Series A, 1.15% due 5/01/2004 (d) 7,600 2,780 Indiana County, Pennsylvania, IDA, PCR, Refunding (Conemaugh Project), VRDN, AMT, Series A, 1.20% due 6/01/2027 (d) 2,780 Jackson Township, Pennsylvania, IDA, Revenue Bonds, VRDN, AMT (d): 1,145 (I Auman Machine Company Inc. Project), 1.25% due 6/01/2008 1,145 1,360 (Pennsylvania Precision Cast Parts), 1.25% due 4/01/2009 1,360 5,915 (V&S Lebanon Galvanizing Project), 1.35% due 4/01/2021 5,915 6,390 Lackawanna County, Pennsylvania, GO, MSTR, VRDN, Series SGB-38, 1.15% due 9/15/2020 (d) 6,390 1,400 Lackawanna County, Pennsylvania, IDA, IDR (Herff Jones Inc. Project), VRDN, AMT, 1.23% due 6/01/2026 (d) 1,400 7,195 Lancaster County, Pennsylvania, Hospital Authority, Health Center Revenue Refunding Bonds (Brethren Village), VRDN, 1.13% due 6/15/2020 (d) 7,195 1,600 Lancaster, Pennsylvania, IDA, IDR (Bucks County Project), VRDN, AMT, 1.20% due 2/01/2010 (d) 1,600 2,900 Lehigh County, Pennsylvania, IDA, Revenue Bonds (New Columbia Joist Company), VRDN, AMT, Series B, 1.20% due 11/01/2022 (d) 2,900 4,530 Luzerne County, Pennsylvania, IDA, Revenue Bonds (Nardone Brothers Baking Project), VRDN, AMT, 1.20% due 3/01/2019 (d) 4,530 3,535 Mercer County, Pennsylvania, IDA, EDR (Solar Atmospheres of Western Pennsylvania), VRDN, 1.10% due 10/01/2010 (d) 3,535 2,700 Monroe County, Pennsylvania, IDA, Revenue Refunding Bonds (UTD Steel Enterprises Project), VRDN, AMT, Series A, 1.22% due 9/01/2013 (d) 2,700 Montgomery County, Pennsylvania, IDA, Revenue Bonds (Alcom Printing Group), VRDN, AMT (d): 305 Series A, 1.40% due 1/01/2020 305 760 Series B, 1.25% due 1/01/2020 760 Montgomery County, Pennsylvania, IDA, Revenue Bonds, VRDN (d): 3,515 (Edmund Optical Manufacturing LLC Project), AMT, 1.25% due 4/01/2016 3,515 280 (Jadko Inc. Project), AMT, Series B, 1.25% due 6/01/2008 280 505 (Jadko Project), AMT, Series A, 1.25% due 6/01/2020 505 1,795 (PB Hoffmann LLC Project), AMT, 1.25% due 1/01/2020 1,795 2,200 (Valley Forge Baptist), 1.15% due 9/01/2023 2,200 CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Schedule of Investments (continued) (In Thousands) Face State Amount Municipal Bonds Value Pennsylvania $ 1,900 Montgomery County, Pennsylvania, IDA, Revenue Refunding Bonds (Laneko Engineering), (continued) VRDN, AMT, Series A, 1.20% due 4/01/2007 (d) $ 1,900 4,100 Montour, Pennsylvania, School District, GO, TRAN, 1.60% due 6/30/2004 4,115 4,425 Mount Lebanon, Pennsylvania, School District, GO, MERLOTS, VRDN, Series B-19, 1.15% due 2/15/2027 (b)(d) 4,425 6,000 Municipal Securities Trust Certificates, Revenue Refunding Bonds, VRDN, Series 2001-121, Class A, 1.14% due 12/22/2009 (c)(d) 6,000 3,500 Norristown, Pennsylvania, TRAN, 2.50% due 12/30/2003 3,507 Northampton County, Pennsylvania, IDA, Revenue Bonds, VRDN (d): 3,645 (DG Properties Inc. Project), AMT, 1.25% due 7/01/2021 3,645 1,675 (Follett Corporation Project), 1.25% due 5/01/2019 1,675 2,310 (Nicos Polymers & Grinding), AMT, 1.25% due 2/01/2020 2,310 3,175 Northumberland County, Pennsylvania, IDA, Revenue Bonds (Butter Krust Baking Company Project), VRDN, AMT, 1.25% due 5/01/2011 (d) 3,175 Pennsylvania Economic Development Financing Authority, EDR, VRDN (d): 3,800 AMT, Series D-7, 1.22% due 8/01/2022 3,800 800 AMT, Series F-5, 1.22% due 12/01/2006 800 600 (Gutchess Hardwoods Inc. Project), Series B, 1.05% due 4/01/2005 600 5,000 (Northeast Architectural Products), AMT, Series B-5, 1.22% due 8/01/2023 5,000 Pennsylvania Economic Development Financing Authority Revenue Bonds, VRDN, AMT (d): 1,935 (Bentley Graphic Commission Inc.), Series C-4, 1.25% due 4/01/2008 1,935 1,410 (International Business Systems Project), Series B-4, 1.20% due 7/01/2012 1,410 3,410 (Waste Gas Fabricating Company Project), Series C-3, 1.25% due 4/01/2020 3,410 900 Pennsylvania Energy Development Authority Revenue Bonds (Piney Creek), VRDN, AMT, Series C, 1.10% due 12/01/2011 (d) 900 2,500 Pennsylvania HFA, S/F Mortgage Revenue Bonds, AMT, Series 76, 1.15% due 10/01/2003 2,500 12,453 Pennsylvania State, GO, FLOATS, Series 696, 1.13% due 5/01/2018 (d)(e) 12,452 5,875 Pennsylvania State, GO, MERLOTS, Series A-15, 1.15% due 1/01/2017 (b)(d) 5,875 5,610 Pennsylvania State, GO, Refunding, PUTTERS, Series 346, 1.11% due 4/01/2011 (c)(d) 5,610 3,300 Pennsylvania State Higher Education Assistance Agency, Student Loan Revenue Bonds, VRDN, AMT, Series A, 1.10% due 6/01/2029 (a)(d) 3,300 15,500 Pennsylvania State Higher Education Assistance Agency, Student Loan Revenue Refunding Bonds, VRDN, AMT, Series A, 1.05% due 6/01/2025 (d)(e) 15,500 Pennsylvania State Higher Educational Facilities Authority Revenue Bonds (Association of Independent Colleges and Universities), VRDN (d): 4,700 Series C-2, 1.80% due 11/01/2003 4,700 700 Series D-4, 1.15% due 5/01/2004 700 6,200 Series F-3, 1.15% due 5/01/2004 6,200 2,500 Series L-3, 1.12% due 5/01/2028 2,500 3,940 Pennsylvania State Higher Educational Facilities Authority Revenue Bonds (Lafayette College), 2.50% due 11/25/2003 3,947 2,900 Pennsylvania State Higher Educational Facilities Authority, Revenue Refunding Bonds (Carnegie Mellon University), VRDN, Series A, 1.10% due 11/01/2025 (d) 2,900 3,000 Pennsylvania State Public School Building Authority, School Revenue Bonds, MERLOTS, VRDN, Series A-42, 1.15% due 6/01/2028 (d)(e) 3,000 3,000 Philadelphia, Pennsylvania, Airport Revenue Refunding Bonds (Philadelphia Airport System), Series A, 6% due 6/15/2004 (c) 3,105 Philadelphia, Pennsylvania, Authority for IDR, VRDN (d): 4,550 (Comhar Inc. Project), 1.10% due 9/01/2023 4,550 11,350 (Fox Chase Cancer Center Project), 1.10% due 7/01/2025 11,350 2,650 (Lannett Company Inc. Project), 1.25% due 5/01/2014 2,650 7,500 Philadelphia, Pennsylvania, GO, TRAN, 2% due 6/30/2004 7,557 2,400 Philadelphia, Pennsylvania, Hospitals and Higher Education Facilities Authority, Hospital Revenue Refunding Bonds (Children's Hospital Project), VRDN, Series A, 1.10% due 2/15/2014 (d) 2,400 2,995 Philadelphia, Pennsylvania, Water and Wastewater Revenue Bonds, FLOATS, VRDN, Series 773, 1.15% due 11/01/2031 (c)(d) 2,995 4,275 Pittsburgh, Pennsylvania, Water and Sewer Authority, Water and Sewer System Revenue Refunding Bonds, 1.15% due 9/01/2004 (e) 4,275 2,300 Pottstown Boro, Pennsylvania, Educational Facilities Authority Revenue Bonds (The Hill School Project), VRDN, 1.15% due 8/01/2032 (d) 2,300 CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Schedule of Investments (concluded) (In Thousands) Face State Amount Municipal Bonds Value Pennsylvania $ 2,000 Red Lion, Pennsylvania, Area School District, TRAN, 1.50% due 6/30/2004 $ 2,006 (concluded) 3,350 Scranton-Lackawanna, Pennsylvania, Health and Welfare Authority, Revenue Refunding Bonds, MERLOTS, VRDN, Series A-18, 1.15% due 3/01/2015 (a)(d) 3,350 4,275 Somerset County, Pennsylvania, IDA, Revenue Bonds (Somerset Welding and Steel), VRDN, AMT, 1.23% due 3/02/2015 (d) 4,275 9,000 South-Central Pennsylvania, General Authority Revenue Bonds, VRDN, Series A, 1.13% due 6/01/2031 (a)(d) 9,000 3,745 Susquehanna County, Pennsylvania, IDA, Revenue Bonds (Pennfield Corporation Project), VRDN, AMT, 1.20% due 8/01/2014 (d) 3,745 6,000 Union County, Pennsylvania, Hospital Authority, Hospital Revenue Refunding Bonds (Evangelical Community Hospital), VRDN, 1.30% due 2/01/2021 (d) 6,000 Venango County, Pennsylvania, IDA (Scrubgrass Project), CP: 15,000 Series 90-A, 0.92% due 12/01/2003 15,000 19,800 Series 90-B, 0.95% due 10/10/2003 19,800 2,000 Washington County, Pennsylvania, IDA, IDR (Pennatronics Corporation Project), VRDN, AMT, 1.23% due 11/01/2020 (d) 2,000 1,510 Westmoreland County, Pennsylvania, IDA, Revenue Bonds (Newcomer Products), VRDN, AMT, 1.23% due 12/01/2006 (d) 1,510 2,670 York County, Pennsylvania, IDA, Revenue Bonds (495 Leasing Project), VRDN, AMT, 1.25% due 6/01/2021 (d) 2,670 Puerto Rico--0.2% 1,000 Municipal Securities Trust Certificates, Puerto Rico, GO, VRDN, Series 2002-199, Class A, 1.05% due 1/25/2016 (b)(d) 1,000 Total Investments (Cost--$499,890*)--99.7% 499,890 Other Assets Less Liabilities--0.3% 1,398 --------- Net Assets--100.0% $ 501,288 ========= (a)AMBAC Insured. (b)MBIA Insured. (c)FGIC Insured. (d)The interest rate is subject to change periodically based upon prevailing market rates. The interest rate shown is the rate in effect at September 30, 2003. (e)FSA Insured. *Cost for Federal income tax purposes. See Notes to Financial Statements. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Statement of Assets and Liabilities As of September 30, 2003 Assets Investments, at value (identified cost--$499,890,196) $ 499,890,196 Cash 60,875 Receivables: Interest $ 1,214,980 Beneficial interest sold 293,129 1,508,109 -------------- Prepaid registration fees and other assets 29,634 -------------- Total assets 501,488,814 -------------- Liabilities Payables: Distributor 136,726 Other affiliates 36,405 Investment adviser 27,675 -------------- Total liabilities 200,806 -------------- Net Assets Net assets $ 501,288,008 ============== Net Assets Consist of Shares of beneficial interest, $.10 par value, unlimited number of shares authorized $ 50,139,468 Paid-in capital in excess of par 451,230,695 Accumulated realized capital losses--net (82,155) -------------- Net Assets--Equivalent to $1.00 per share based on 501,394,681 shares of beneficial interest outstanding $ 501,288,008 ============== See Notes to Financial Statements. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Statement of Operations For the Six Months Ended September 30, 2003 Investment Income Interest and amortization of premium and discount earned $ 3,194,934 Expenses Investment advisory fees $ 1,403,987 Distribution fees 351,845 Accounting services 59,389 Transfer agent fees 39,352 Professional fees 29,928 Printing and shareholder reports 11,352 Registration fees 10,664 Custodian fees 9,992 Pricing fees 7,678 Trustees' fees and expenses 2,665 Other 7,314 -------------- Total expenses 1,934,166 -------------- Investment income--net 1,260,768 -------------- Net Increase in Net Assets Resulting from Operations $ 1,260,768 ============== See Notes to Financial Statements. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Statements of Changes in Net Assets For the Six For the Months Ended Year Ended September 30, March 31, Increase (Decrease) in Net Assets: 2003 2003 Operations Investment income--net $ 1,260,768 $ 4,931,376 Realized loss on investments--net -- (300) --------------- --------------- Net increase in net assets resulting from operations 1,260,768 4,931,076 --------------- --------------- Dividends to Shareholders Dividends to shareholders from investment income--net (1,260,768) (4,931,376) --------------- --------------- Beneficial Interest Transactions Net proceeds from sale of shares 932,345,766 1,871,842,607 Value of shares issued to shareholders in reinvestment of dividends 1,261,018 4,931,064 --------------- --------------- 933,606,784 1,876,773,671 Cost of shares redeemed (1,023,424,036) (1,914,023,882) --------------- --------------- Net decrease in net assets derived from beneficial interest transactions (89,817,252) (37,250,211) --------------- --------------- Net Assets Total decrease in net assets (89,817,252) (37,250,511) Beginning of period 591,105,260 628,355,771 --------------- --------------- End of period $ 501,288,008 $ 591,105,260 =============== =============== See Notes to Financial Statements. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Financial Highlights The following per share data and ratios have been derived For the Six from information provided in the financial statements. Months Ended September 30, For the Year Ended March 31, Increase (Decrease) in Net Asset Value: 2003 2003 2002 2001 2000 Per Share Operating Performance Net asset value, beginning of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ---------- ---------- ---------- ---------- ---------- Investment income--net --++ .01 .02 .03 .03 Realized loss on investments--net -- --++++ --++++ --++++ --++++ ---------- ---------- ---------- ---------- ---------- Total from investment operations --++ .01 .02 .03 .03 ---------- ---------- ---------- ---------- ---------- Less dividends from investment income--net --++++ (.01) (.02) (.03) (.03) ---------- ---------- ---------- ---------- ---------- Net asset value, end of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ========== ========== ========== ========== ========== Total Investment Return .43%* .83% 1.71% 3.47% 2.81% ========== ========== ========== ========== ========== Ratios to Average Net Assets Expenses .68%* .67% .68% .68% .69% ========== ========== ========== ========== ========== Investment income--net .44%* .84% 1.72% 3.42% 2.78% ========== ========== ========== ========== ========== Supplemental Data Net assets, end of period (in thousands) $ 501,288 $ 591,105 $ 628,356 $ 601,403 $ 539,177 ========== ========== ========== ========== ========== *Annualized. ++Amount is less than $.01 per share. ++++Amount is less than $(.01) per share. See Notes to Financial Statements. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Notes to Financial Statements 1. Significant Accounting Policies: CMA Pennsylvania Municipal Money Fund (the "Fund") is part of CMA Multi-State Municipal Series Trust (the "Trust"). The Fund is registered under the Investment Company Act of 1940, as amended, as a non-diversified, open-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. These unaudited financial statements reflect all adjustments, which are, in the opinion of management, necessary to a fair statement of the results for the interim period presented. All such adjustments are of a normal, recurring nature. The following is a summary of significant accounting policies followed by the Fund. (a) Valuation of investments--Investments are valued at amortized cost, which approximates market value. For the purpose of valuation, the maturity of a variable rate demand instrument is deemed to be the demand notice payment period. In the case of a floating rate instrument, the remaining maturity is the next coupon date on which the interest rate is to be adjusted. (b) 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. (c) Security transactions and investment income--Security 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 (including amortization of premium and discount) is recognized on the accrual basis. (d) Prepaid registration fees--Prepaid registration fees are charged to expense as the related shares are issued. (e) Dividends and distributions to shareholders--The Fund declares dividends daily and reinvests daily such dividends (net of non- resident alien tax and backup withholding tax withheld) in additional fund shares at net asset value. Dividends are declared from the total of net investment income, excluding discounts earned other than original issue discounts. Net realized capital gains, if any, are normally distributed annually after deducting prior years' loss carryforward. The Fund may distribute capital gains more frequently than annually in order to maintain the Fund's net asset value at $1.00 per share. (f) Expenses--Certain expenses have been allocated to the individual funds in the Trust on a pro rata basis based upon the respective aggregate net asset value of each fund included in the Trust. 2. Investment Advisory Agreement and Transactions with Affiliates: The Fund has entered into an Investment Advisory Agreement with Fund Asset Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc. ("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited partner. FAM 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 based upon the average daily value of the Fund's net assets, at the following annual rates: .50% of the first $500 million of average daily net assets; .425% of average daily net assets in excess of $500 million but not exceeding $1 billion; and .375% of average daily net assets in excess of $1 billion. Pursuant to the Distribution and Shareholder Servicing Plan in compliance with Rule 12b-1 under the Investment Company Act of 1940, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S") receives a distribution fee from the Fund at the end of each month at the annual rate of .125% of average daily net assets of the Fund. The distribution fee is to compensate MLPF&S financial advisors and other directly involved branch office personnel for selling shares of the Fund and for providing direct personal services to shareholders. The distribution fee is not compensation for the administrative and operational services rendered to the Fund by MLPF&S in processing share orders and administering shareholder accounts. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Notes to Financial Statements (concluded) Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is the Fund's transfer agent. For the six months ended September 30, 2003, the Fund reimbursed FAM $6,391 for certain accounting services. Certain officers and/or trustees of the Fund are officers and/or directors of FAM, PSI, FDS, and/or ML & Co. 3. Shares of Beneficial Interest: The number of shares sold, reinvested and redeemed during the periods corresponds to the amounts included in the Statements of Changes in Net Assets for net proceeds from sale of shares, value of shares reinvested and cost of shares, redeemed, respectively, since shares are recorded at $1.00 per share. 4. Capital Loss Carryforward: On March 31, 2003, the Fund had a net capital loss carryforward of $81,856, of which $22,380 expires in 2006; $3,815 expires in 2007; $20,995 expires in 2008; $33,951 expires in 2009; and $715 expires in 2010. This amount will be available to offset like amounts of any future taxable gains. Electronic Delivery The Fund is now offering electronic delivery of communications to its shareholders. In order to receive this service, you must register your account and provide us with e-mail information. To sign up for this service, simply access this website http://www.icsdelivery.com/live and follow the instructions. When you visit this site, you will obtain a personal identification number (PIN). You will need this PIN should you wish to update your e-mail address, choose to discontinue this service and/or make any other changes to the service. This service is not available for certain retirement accounts at this time. CMA PENNSYLVANIA MUNICIPAL MONEY FUND, SEPTEMBER 30, 2003 Item 2 - Did registrant adopt a code of ethics, as of the end of the period covered by this report, that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party? If not, why not? Briefly describe any amendments or waivers that occurred during the period. State here if code of ethics/amendments/waivers are on website and give website address-. State here if fund will send code of ethics to shareholders without charge upon request--N/A (annual requirement only) Item 3 - Did the registrant's board of directors determine that the registrant either: (i) has at least one audit committee financial expert serving on its audit committee; or (ii) does not have an audit committee financial expert serving on its audit committee? If yes, disclose name of financial expert and whether he/she is "independent," (fund may, but is not required, to disclose name/ independence of more than one financial expert) If no, explain why not. - N/A (annual requirement only) Item 4 - Disclose annually only (not answered until December 15, 2003) (a) Audit Fees - Disclose aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. N/A. (b) Audit-Related Fees - Disclose aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A. (c) Tax Fees - Disclose aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A. (d) All Other Fees - Disclose aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A. (e)(1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. N/A. (e)(2)Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. N/A. (f) If greater than 50%, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A. (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. N/A. (h) Disclose whether the registrant's audit committee has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. N/A. Item 5 - If the registrant is a listed issuer as defined in Rule 10A- 3 under the Exchange Act, state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act. If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee in Section 3(a)(58)(B) of the Exchange Act, so state. If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act regarding an exemption from the listing standards for audit committees. N/A (Listed issuers must be in compliance with the new listing rules by the earlier of their first annual shareholders meeting after January 2004, or October 31, 2004 (annual requirement)) Item 6 - Reserved Item 7 - For closed-end funds that contain voting securities in their portfolio, describe the policies and procedures that it uses to determine how to vote proxies relating to those portfolio securities. N/A Item 8--Reserved Item 9(a) - The registrant's certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. Item 9(b)--There were no significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. Item 10 - Exhibits 10(a) - Attach code of ethics or amendments/waivers, unless code of ethics or amendments/waivers is on website or offered to shareholders upon request without charge. N/A. 10(b) - Attach certifications pursuant to Section 302 of the Sarbanes-Oxley Act. 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. CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust By: _/s/ Terry K. Glenn_______ Terry K. Glenn, President of CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust Date: November 21, 2003 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/ Terry K. Glenn________ Terry K. Glenn, President of CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust Date: November 21, 2003 By: _/s/ Donald C. Burke________ Donald C. Burke, Chief Financial Officer of CMA Pennsylvania Municipal Money Fund of CMA Multi-State Municipal Series Trust Date: November 21, 2003 Attached hereto as a furnished exhibit are the certifications pursuant to Section 906 of the Sarbanes-Oxley Act.