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 811-4802 Name of Fund: Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch Municipal Series Trust Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Terry K. Glenn, President, Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch 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: 10/31/04 Date of reporting period: 11/01/03 - 04/30/04 Item 1 - Report to Stockholders [LOGO] Merrill Lynch Investment Managers www.mlim.ml.com Merrill Lynch Municipal Intermediate Term Fund Semi-Annual Report April 30, 2004 [LOGO] Merrill Lynch Investment Managers Merrill Lynch Municipal Intermediate Term Fund Officers and Trustees Terry K. Glenn, President and Trustee Ronald W. Forbes, Trustee Cynthia A. Montgomery, 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 William R. Bock, Vice President Donald C. Burke, Vice President and Treasurer Phillip S. Gillespie, Secretary - -------------------------------------------------------------------------------- Charles C. Reilly, Trustee of Merrill Lynch Municipal Intermediate Term Fund, has recently retired. The Fund's Board of Trustees wishes Mr. Reilly well in his retirement. - -------------------------------------------------------------------------------- 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 800-637-3863 2 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 A Letter From the President Dear Shareholder For the six-month and 12-month periods ended April 30, 2004, the Lehman Brothers Municipal Bond Index posted returns of +1.19% and +2.68%, respectively. Its taxable counterpart, the Lehman Brothers Aggregate Bond Index, had returns of +1.25% and +1.82% for the same periods. Amid considerable month-to-month volatility, tax-exempt bond yields rose over the past year, although not to the same extent as 10-year U.S. Treasury yields. In all, tax-exempt securities continued to be an attractive fixed income investment alternative. As of April month-end, the Federal Reserve Board maintained its accommodative policy stance, although a better-than-expected employment report for the month of March prompted speculation that an interest rate increase could come sooner than many had expected. On April 2, 2004, the good news on the employment front - -- previously the one dim spot in an otherwise bright economic picture -- helped prompt the yield on the 10-year Treasury bond to spike nearly 25 basis points (.25%), from 3.91% to 4.15%. Market watchers continue to monitor the economic data and Federal Reserve Board language for indications of interest rate direction. If economic growth maintains its recent pace and employment figures continue to improve, many believe it is just a matter of time before interest rates move upward. Equity markets, in the meantime, gleaned support from the improving economic environment and provided attractive returns. For the six-month and 12-month periods ended April 30, 2004, the Standard & Poor's 500 Index returned +6.27% and +22.88%, respectively. Significant fiscal and monetary stimulus in 2003, including low interest rates and tax cuts, has opened the door to consumer spending, capital spending, increases in exports and long-awaited job growth. As expected, these developments have led the way to improvements in corporate earnings -- a positive for stock markets. The events and efforts of the past year leave us with a much stronger economy today. Of course, markets will always fluctuate, and there are many uncertainties -- not the least of which are geopolitical in nature -- which can translate into negative market movements. Keeping this in mind, we encourage you to revisit your portfolio and your asset allocation strategy to ensure you are well positioned to take advantage of the opportunities that lie ahead. Importantly, your financial advisor can help you develop a strategy most suitable for your circumstances through all types of market and economic cycles. 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, /s/ Terry K. Glenn Terry K. Glenn President and Trustee MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 3 [LOGO] Merrill Lynch Investment Managers A Discussion With Your Fund's Portfolio Manager The intermediate portion of the municipal yield curve came under pressure during the period as heavy supply forced the prices on these bonds below the market average. Describe the recent market environment relative to municipal bonds. For much of the six-month period, a positive economic backdrop helped bond prices to move higher as yields, which typically move opposite of prices, declined. In early April, however, a surprisingly strong monthly employment report triggered fears that the long-accommodative Federal Reserve Board might raise interest rates sooner than many had expected. As a result, bond yields rose (prices fell) sharply for the remainder of the period. At the end of April, long-term U.S. Treasury bond yields had climbed to 5.13%, representing an increase of approximately 15 basis points (.15%) over the past six months. Ten-year U.S. Treasury note yields stood at 4.30% as of period-end, an increase of more than 20 basis points. Tax-exempt bond yields generally mimicked the movement of their taxable counterparts, although volatility in the municipal market was more subdued. Long-term revenue bond yields, as measured by the Bond Buyer Revenue Bond Index, rose just four basis points over the past six months. For the same period, yields on Aaa-rated issues maturing in 30 years rose approximately 10 basis points to 4.93% while yields on 10-year, Aaa-rated issues increased more than 16 basis points to nearly 4%, according to Municipal Market Data. The more marked increase in 10-year bond yields may be attributed to the fact that recent issuance has been heavily concentrated in the 10-year - 20-year range. The resulting supply imbalance prompted higher intermediate bond yields (and lower prices). Longer-maturity and lower-rated issues continued to benefit from more favorable supply/demand factors and, therefore, have seen less price depreciation. For the six-month period as a whole, municipal bond supply declined approximately 5% compared to the same period a year ago. While investor enthusiasm for stocks has taken some attention away from fixed income markets, overall demand for tax-exempt municipal bonds has remained positive. Recent Federal Reserve Board statistics showed that U.S. household holdings of municipal securities increased by more than $25 billion during the fourth quarter of 2003 to approximately $680 billion. In addition, data from the Investment Company Institute indicates that, in just the first three months of 2004, tax-exempt bond funds have seen net new cash flows of almost $640 million. How did the Fund perform during the period in light of the existing market conditions? For the six-month period ended April 30, 2004, Merrill Lynch Municipal Intermediate Term Fund's Class A, Class B, Class C and Class I Shares had total returns of +0.18%, +0.17%, +0.17% and +0.32%, respectively. (Fund results shown do not reflect sales charges and would be lower if sales charges were included. Complete performance information can be found on pages 6 and 7 of this report to shareholders.) Fund returns lagged the +1.19% return of the unmanaged benchmark, the Lehman Brothers Municipal Bond Index, and the +0.34% return of the Lipper Intermediate Municipal Debt Funds category for the same six-month period. (Funds in this Lipper category invest primarily in municipal debt issues with dollar-weighted average maturities in the area of five years - ten years.) The difference in returns relative to the Lehman Brothers Municipal Bond Index is understandable given the Fund's more limited investment parameters. As an intermediate-term product, the Fund's investment is concentrated on those bonds maturing in approximately 10 years - 11 years while the Index covers the full range of the municipal bond yield curve. As mentioned earlier, a heavy supply of bonds in the intermediate maturity range served to push their prices lower, causing this sector of the yield curve to underperform the broader market. What changes were made to the portfolio during the period? We remained focused on purchasing premium-coupon bonds in the 9-year - 10-year maturity range, with a focus on enhancing dividend yield. In periods of heavy interest rate volatility, our focus is on using the most prudent strategies to balance risk and reward. To that end, we engaged in a number of bond swaps to take advantage of market aberrations during the period. The swaps allowed us to sell bonds that were purchased at yields lower than currently available in the market and replace them with new, higher-yielding bonds that may vary in coupon, maturity and/or issuer. We also engaged in tax-loss swaps, which enabled us to offset capital gains realized in 2003. By the end of the six months, we had increased the Fund's cash position to approximately 4 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 9% of total assets. The goal was to make the portfolio more defensive and, thereby, less sensitive to rising interest rates. How would you characterize the portfolio's position at the close of the period? The economy is showing signs of real growth -- including job growth, which until recently had been one of the last areas of weakness. With preliminary signs of higher inflation on the horizon, investors already have begun to anticipate a near-term change in the Federal Reserve Board's interest rate policy. Given this scenario, we are looking for further flattening of the yield curve and significant underperformance in the 10-year - 15-year range. Against this backdrop, we plan to maintain our defensive market posture. Specifically, we expect to focus on premium-coupon bonds with maturities of less than 10 years -- unless the market overreacts and drops further than we believe is warranted. Finally, we also plan to collapse the Fund's shorter-maturity derivative holdings in an effort to provide the portfolio with additional downside protection. William R. Bock Vice President and Portfolio Manager May 17, 2004 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 5 [LOGO] Merrill Lynch Investment Managers Performance Data About Fund Performance Investors are able to purchase shares of the Fund through multiple pricing alternatives: o Class A Shares incur a maximum initial sales charge of 1% and an account maintenance fee of 0.10% (but no distribution fee). o Class B Shares are subject to a maximum contingent deferred sales charge of 1%, declining to 0% after three years. All Class B Shares purchased prior to December 1, 2002 will maintain the one-year schedule. In addition, Class B Shares are subject to a distribution fee of 0.10% and an account maintenance fee of 0.20%. These shares automatically convert to Class A Shares after approximately ten years. (There is no initial sales charge for automatic share conversions.) o Class C Shares are subject to a distribution fee of 0.10% and an account maintenance fee of 0.20%. In addition, Class C Shares are subject to a 1% contingent deferred sales charge if redeemed within one year of purchase. o Class I Shares incur a maximum initial sales charge (front-end load) of 1% and bear no ongoing distribution or account maintenance fees. Class I Shares are available only to eligible investors. None of the past results shown should be considered a representation of future performance. Current performance may be lower or higher than the performance data quoted. Refer to www.mlim.ml.com to obtain more current performance information. Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. Figures shown in each of the following tables assume reinvestment of all dividends and capital gain distributions, if any, at net asset value on the payable date. The Fund's investment adviser reimbursed a portion of the Fund's expenses. Without such reimbursement the Fund's performance would have been lower. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Dividends paid to each class of shares will vary because of the different levels of account maintenance, distribution and transfer agency fees applicable to each class, which are deducted from the income available to be paid to shareholders. Recent Performance Results 10-Year/ 6-Month 12-Month Since Inception Standardized As of April 30, 2004 Total Return Total Return Total Return 30-Day Yield ========================================================================================================================= ML Municipal Intermediate Term Fund Class A Shares* +0.18% +1.61% +67.47% 2.97% - ------------------------------------------------------------------------------------------------------------------------- ML Municipal Intermediate Term Fund Class B Shares* +0.17 +1.49 +64.88 2.78 - ------------------------------------------------------------------------------------------------------------------------- ML Municipal Intermediate Term Fund Class C Shares* +0.17 +1.50 +64.16 2.79 - ------------------------------------------------------------------------------------------------------------------------- ML Municipal Intermediate Term Fund Class I Shares* +0.32 +1.81 +70.12 3.07 - ------------------------------------------------------------------------------------------------------------------------- Lehman Brothers Municipal Bond Index** +1.19 +2.68 +87.06/+88.67 -- - ------------------------------------------------------------------------------------------------------------------------- * Investment results shown do not reflect sales charges; results shown would be lower if a sales charge was included. Total investment returns are based on changes in net asset values for the periods shown, and assume reinvestment of all dividends and capital gains distributions at net asset value on the payable date. The Fund's 10-year/since inception periods are 10 years for Class B & Class I Shares and from 10/21/94 for Class A & Class C Shares. ** This unmanaged Index consists of revenue bonds, prerefunded bonds, general obligation bonds and insured bonds. Ten-year/since inception total returns are for 10 years and from 10/31/94. 6 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Performance Data (concluded) Average Annual Total Return Return Without Return With Sales Charge Sales Charge** ================================================================================ Class A Shares* ================================================================================ One Year Ended 4/30/04 +1.61% +0.59% - -------------------------------------------------------------------------------- Five Years Ended 4/30/04 +4.77 +4.56 - -------------------------------------------------------------------------------- Inception (10/21/94) through 4/30/04 +5.56 +5.45 - -------------------------------------------------------------------------------- * Maximum sales charge is 1%. ** Assuming maximum sales charge. Return Return Without CDSC With CDSC** ================================================================================ Class B Shares* ================================================================================ One Year Ended 4/30/04 +1.49% +0.51% - -------------------------------------------------------------------------------- Five Years Ended 4/30/04 +4.56 +4.56 - -------------------------------------------------------------------------------- Ten Years Ended 4/30/04 +5.13 +5.13 - -------------------------------------------------------------------------------- * Maximum contingent deferred sales charge is 1% and is reduced to 0% after three years. ** Assuming payment of applicable contingent deferred sales charge. - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC** ================================================================================ Class C Shares* ================================================================================ One Year Ended 4/30/04 +1.50% +0.52% - -------------------------------------------------------------------------------- Five Years Ended 4/30/04 +4.56 +4.56 - -------------------------------------------------------------------------------- Inception (10/21/94) through 4/30/04 +5.34 +5.34 - -------------------------------------------------------------------------------- * Maximum contingent deferred sales charge is 1% and is reduced to 0% after one year. ** Assuming payment of applicable contingent deferred sales charge. - -------------------------------------------------------------------------------- Return Without Return With Sales Charge Sales Charge** ================================================================================ Class I Shares* ================================================================================ One Year Ended 4/30/04 +1.81% +0.79% - -------------------------------------------------------------------------------- Five Years Ended 4/30/04 +4.87 +4.66 - -------------------------------------------------------------------------------- Ten Years Ended 4/30/04 +5.46 +5.35 - -------------------------------------------------------------------------------- * Maximum sales charge is 1%. ** Assuming maximum sales charge. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 7 [LOGO] Merrill Lynch Investment Managers Schedule of Investments (in Thousands) S&P Moody's Face State Ratings Ratings Amount Municipal Bonds Value =================================================================================================================================== Alaska--1.4% AAA Aaa $2,250 Alaska Student Loan Corporation, Student Loan Revenue Bonds, AMT, Series A, 5.65% due 7/01/2012 (a) $ 2,350 =================================================================================================================================== California--14.4% NR* NR* 875 Agua Caliente Band of Cahuilla Indians, California, Casino Revenue Bonds, 5.60% due 7/01/2013 869 AAA Aaa 5,000 California Infrastructure and Economic Development Bank, Bay Area Toll Bridges Revenue Bonds, First Lien, Series A, 5.25% due 7/01/2014 (d) 5,451 BBB- Baa2 3,500 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.50% due 6/01/2014 3,742 AAA Aaa 4,000 California State Public Works Board, Lease Revenue Refunding Bonds (Department of Corrections), Series D, 5% due 12/01/2014 (b) 4,271 BBB- Baa2 2,500 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series B, 5.375% due 6/01/2017 2,545 AAA Aaa 5,050 Long Beach, California, Harbor Revenue Bonds, AMT, Series B, 5.25% due 5/15/2013 (b) 5,337 AAA Aaa 2,620 Rancho Cucamonga, California, Redevelopment Agency, Tax Allocation Refunding Bonds (Rancho Redevelopment Project), 5% due 9/01/2014 (a) 2,805 =================================================================================================================================== Colorado--4.5% AAA Aaa 5,000 Denver, Colorado, City and County Airport Revenue Bonds, AMT, Series D, 7.75% due 11/15/2013 (a) 6,087 A1+ VMIG1+ 1,800 Moffat County, Colorado, PCR, Refunding (Pacificorp Projects), VRDN, 1.10% due 5/01/2013 (a)(g) 1,800 =================================================================================================================================== Florida--1.7% NR* NR* 585 Double Branch Community, Florida, Development District, Special Assessment Bonds, Series B-1, 5.60% due 5/01/2007 584 NR* NR* 830 Middle Village Community Development District, Florida, Special Assessment Bonds, Series C, 5.125% due 5/01/2009 824 NR* NR* 600 Reunion East Community Development District, Florida, Special Assessment, Series B, 5.90% due 11/01/2007 599 NR* NR* 1,000 Sterling Hill, Florida, Community Development District, Capital Improvement Revenue Refunding Bonds, Series B, 5.50% due 11/01/2010 994 =================================================================================================================================== Georgia--2.4% NR* NR* 1,050 Fulton County, Georgia, Residential Care Facilities Revenue Refunding Bonds (Canterbury Court Project), Series A, 5% due 2/15/2014 1,023 BBB Baa2 3,000 Savannah, Georgia, EDA, PCR, Refunding (International Paper Company Projects), Series A, 5.10% due 8/01/2014 3,109 =================================================================================================================================== Illinois--7.1% AAA NR* 5,000 Chicago, Illinois, O'Hare International Airport Revenue Refunding Bonds, DRIVERS, AMT, Series 370, 9.07% due 7/01/2011 (c)(d) 5,529 NR* NR* 1,000 Chicago, Illinois, Tax Allocation Bonds (Kingsbury Redevelopment Project), Series A, 6.57% due 2/15/2013 1,046 AA- A1 5,000 Illinois State Toll Highway Authority, Toll Highway Priority Revenue Bonds, Series A, 6.30% due 1/01/2011 5,775 =================================================================================================================================== Indiana--3.3% AA- NR* 5,000 Franklin Township, Indiana, School Building Corporation, Marion County, First Mortgage Revenue Bonds, 6.0% due 7/15/2010 (e) 5,832 =================================================================================================================================== Massachusetts--2.4% NR* Aa3 3,300 Massachusetts State Revenue Bonds, RIB, Series 420, 10.13% due 12/15/2014 (c) 4,177 Portfolio Abbreviations To simplify the listings of Merrill Lynch Municipal Intermediate Term Fund'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) BAN Bond Anticipation Notes COP Certificates of Participation DRIVERS Derivative Inverse Tax-Exempt Receipts EDA Economic Development Authority GO General Obligation Bonds HDA Housing Development Authority IDA Industrial Development Authority PCR Pollution Control Revenue Bonds RIB Residual Interest Bonds TAN Tax Anticipation Notes VRDN Variable Rate Demand Notes 8 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Schedule of Investments (continued) (in Thousands) S&P Moody's Face State Ratings Ratings Amount Municipal Bonds Value =================================================================================================================================== Michigan--2.5% AAA Aaa $4,000 Michigan Municipal Bond Authority, Clean Water Revenue Bonds (State Revolving Fund), 5% due 10/01/2014 $ 4,313 =================================================================================================================================== New Jersey--4.8% AAA Aaa 2,230 New Jersey State, GO, 5.50% due 8/01/2013 (b) 2,494 NR* Aaa 5,000 Port Authority of New York and New Jersey Revenue Refunding Bonds, RIB, AMT, Series 701-X, 10.15% due 10/15/2014 (b)(c) 5,800 =================================================================================================================================== New Mexico--3.2% BBB Baa2 2,000 Farmington, New Mexico, PCR, Refunding (Public Service Company of New Mexico--San Juan), Series B, 6.30% due 12/01/2016 2,140 AA+ Aa2 3,000 New Mexico State Highway Commission, Tax Revenue Bonds, Senior Sub-Lien, Series A, 6% due 6/15/2013 3,404 =================================================================================================================================== New York--2.9% A A2 2,000 New York State Urban Development Corporation Revenue Bonds, Subordinate Lien, Corporation Purpose, Series A, 5.125% due 7/01/2015 2,079 Schenectady, New York, GO: NR* NR* 1,000 BAN, Series B, 3.75% due 5/28/2004 999 NR* NR* 1,000 TAN, 6.25% due 12/30/2004 997 NR* NR* 1,000 Westchester County, New York, IDA, Continuing Care Retirement Mortgage Revenue Bonds (Kendal on the Hudson Project), Series A, 5.625% due 1/01/2013 1,008 =================================================================================================================================== North Carolina--1.9% AAA Aa1 3,000 North Carolina State, Public Improvement, GO, Series A, 5.25% due 3/01/2015 3,292 =================================================================================================================================== Ohio--3.1% AAA Aaa 5,000 Cincinnati, Ohio, City School District, Classroom Facilities Construction & Improvement, GO, 5.25% due 12/01/2014 (d) 5,464 =================================================================================================================================== Oregon--6.8% AAA Aaa 5,475 Oregon State Department of Administrative Services, COP, Series A, 5.75% due 5/01/2010 (a)(e) 6,256 AAA Aaa 5,000 Oregon State Department of Administrative Services, Lottery Revenue Bonds, Series B, 5.75% due 4/01/2009 (d)(e) 5,653 =================================================================================================================================== Pennsylvania--3.1% AAA Aaa 4,940 Pennsylvania State Turnpike Commission, Oil Franchise Tax Revenue Bonds, Senior Series A, 5.25% due 12/01/2014 (b) 5,399 =================================================================================================================================== Tennessee--2.6% NR* VMIG1+ 2,900 Blount County, Tennessee, Public Building Authority, Local Government Public Improvement Revenue Bonds, VRDN, Series A3A, 1.11% due 6/01/2026 (a)(g) 2,900 AA Aa2 1,600 Tennessee HDA, Revenue Bonds (Homeownership Program), AMT, Series 2-C, 5.85% due 7/01/2009 1,686 =================================================================================================================================== Texas--9.7% A1+ VMIG1+ 5,000 Bell County, Texas, Health Facilities Development Corporation, Hospital Revenue Bonds (Scott & White Memorial Hospital), VRDN, Series 2001-2, 1.10% due 8/15/2031 (b)(g) 5,000 Brazos River Authority, Texas, PCR, Refunding, AMT: BBB Baa2 2,000 (TXU Energy Company LLC Project), Series A, 6.75% due 4/01/2038 2,248 BBB Baa2 1,000 (Utilities Electric Company), Series B, 5.05% due 6/01/2030 1,036 BBB- NR* 2,000 Brazos River Authority, Texas, Revenue Refunding Bonds (Reliant Energy Inc. Project), Series B, 7.75% due 12/01/2018 2,174 BBB- Baa3 1,000 Dallas-Fort Worth, Texas, International Airport Facility, Improvement Corporation Revenue Bonds (Learjet Inc.), AMT, Series 2001-A-1, 6.15% due 1/01/2016 1,000 AAA Aaa 5,000 Dallas-Fort Worth, Texas, International Airport Revenue Refunding and Improvement Bonds, AMT, Series A, 5.75% due 11/01/2014 (f) 5,378 =================================================================================================================================== Washington--12.0% AAA Aaa 3,000 King County, Washington, GO (Harborview Medical Center), 5% due 12/01/2012 (a) 3,225 NR* Aa1 4,860 Pierce County, Washington, School District Number 416, White River, GO, 6% due 12/01/2012 5,488 A Aa3 5,000 Seattle, Washington, Municipal Light and Power Revenue Bonds, 6% due 10/01/2012 5,535 BBB Baa3 1,000 Tobacco Settlement Authority, Washington, Tobacco Settlement Revenue Bonds, 5.50% due 6/01/2012 957 AA Aa1 5,000 Washington State, GO, Series B, 6% due 1/01/2012 5,623 =================================================================================================================================== Puerto Rico--2.4% A- Baa1 4,000 Puerto Rico Commonwealth, GO, Refunding, Series A, 5% due 7/01/2030 4,218 ------------------------------------------------------------------------------------------------------------- Total Municipal Bonds (Cost--$155,427)--92.2% 160,515 ============================================================================================================= MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 9 [LOGO] Merrill Lynch Investment Managers Schedule of Investments (concluded) (in Thousands) Shares Held Mutual Funds Value ============================================================================================================= 244 BlackRock Insured Municipal 2008 Term Trust, Inc. $ 3,950 230 BlackRock Insured Municipal Term Trust, Inc. 2,465 344 BlackRock Municipal Target Term Trust Inc. 3,610 ------------------------------------------------------------------------------------------------------------- Total Mutual Funds (Cost--$10,563)--5.8% 10,025 ============================================================================================================= Short-Term Securities ============================================================================================================= 4,019 Merrill Lynch Institutional Tax-Exempt Fund (h) 4,019 ------------------------------------------------------------------------------------------------------------- Total Short-Term Securities (Cost--$4,019)--2.3% 4,019 ============================================================================================================= Total Investments (Cost--$170,009)--100.3% 174,559 Liabilities in Excess of Other Assets--(0.3%) (542) -------- Net Assets--100.0% $174,017 ======== * Not Rated. + Highest short-term rating by Moody's Investors Service, Inc. (a) AMBAC Insured. (b) MBIA Insured. (c) The interest rate is subject to change periodically and inversely based upon prevailing market rates. The interest rate shown is the rate in effect at April 30, 2004. (d) FSA Insured. (e) Prerefunded. (f) FGIC Insured. (g) The interest rate is subject to change periodically based upon prevailing market rates. The interest rate shown is the rate in effect at April 30, 2004. (h) Investments in companies considered to be an affiliate of the Fund (such companies are defined as "Affiliated Companies" in Section 2 (a)(3) of the Investment Company Act of 1940) are as follows: (in Thousands) -------------------------------------------------------------------------- Net Dividend Affiliate Activity Income -------------------------------------------------------------------------- Merrill Lynch Institutional Tax-Exempt Fund (10,400) $62 -------------------------------------------------------------------------- Forward interest rate swaps entered into as of April 30, 2004 were as follows: (in Thousands) -------------------------------------------------------------------------- Notional Unrealized Amount Appreciation -------------------------------------------------------------------------- Receive a variable rate equal to 7-Day Bond Market Association Municipal Swap Index Rate at a quarterly reset date and pay a fixed rate of 3.804% Broker, Morgan Stanley Capital Services, Inc. Expires July 2014 $23,000 $220 -------------------------------------------------------------------------- See Notes to Financial Statements. 10 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Statement of Assets and Liabilities As of April 30, 2004 ============================================================================================================ Assets - ------------------------------------------------------------------------------------------------------------ Investments in unaffiliated securities, at value (identified cost--$165,989,914) ........................ $170,540,169 Investments in affiliated securities, at value (identified cost--$4,019,241) .......................... 4,019,241 Cash .................................................... 352,691 Unrealized appreciation on forward interest rate swaps .. 219,857 Receivables: Securities sold ...................................... $ 10,569,064 Interest ............................................. 2,460,991 Beneficial interest sold ............................. 499,935 Dividends (including $98 from affiliates) ............ 33,720 13,563,710 ------------ Prepaid expenses ........................................ 39,816 ------------ Total assets ............................................ 188,735,484 ------------ ============================================================================================================ Liabilities - ------------------------------------------------------------------------------------------------------------ Payables: Securities purchased ................................. 13,953,085 Beneficial interest redeemed ......................... 472,477 Dividends to shareholders ............................ 163,071 Investment adviser ................................... 89,008 Other affiliates ..................................... 20,272 Distributor .......................................... 19,740 14,717,653 ------------ Accrued expenses ........................................ 411 ------------ Total liabilities ....................................... 14,718,064 ------------ ============================================================================================================ Net Assets - ------------------------------------------------------------------------------------------------------------ Net assets .............................................. $174,017,420 ============ ============================================================================================================ Net Assets Consist of - ------------------------------------------------------------------------------------------------------------ Class A Shares of beneficial interest, $.10 par value, unlimited number of shares authorized .................. $ 519,445 Class B Shares of beneficial interest, $.10 par value, unlimited number of shares authorized .................. 232,915 Class C Shares of beneficial interest, $.10 par value, unlimited number of shares authorized .................. 304,742 Class I Shares of beneficial interest, $.10 par value, unlimited number of shares authorized .................. 597,491 Paid-in capital in excess of par ........................ 166,652,250 Undistributed investment income--net .................... $ 62,543 Undistributed realized capital gains on investments--net 877,922 Unrealized appreciation on investments--net ............. 4,770,112 ------------ Total accumulated earnings--net ......................... 5,710,577 ------------ Net Assets .............................................. $174,017,420 ============ ============================================================================================================ Net Asset Value - ------------------------------------------------------------------------------------------------------------ Class A--Based on net assets of $54,618,482 and 5,194,445 shares of beneficial interest outstanding .............. $ 10.51 ============ Class B--Based on net assets of $24,498,601 and 2,329,149 shares of beneficial interest outstanding .............. $ 10.52 ============ Class C--Based on net assets of $32,044,502 and 3,047,424 shares of beneficial interest outstanding .............. $ 10.52 ============ Class I--Based on net assets of $62,855,835 and 5,974,911 shares of beneficial interest outstanding .............. $ 10.52 ============ See Notes to Financial Statements. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 11 [LOGO] Merrill Lynch Investment Managers Statement of Operations For the Six Months Ended April 30, 2004 ============================================================================================================ Investment Income - ------------------------------------------------------------------------------------------------------------ Interest ................................................ $ 3,688,979 Dividends (including $61,533 from affiliates) ........... 124,698 ------------ Total income ............................................ 3,813,677 ------------ ============================================================================================================ Expenses - ------------------------------------------------------------------------------------------------------------ Investment advisory fees ................................ $ 464,547 Accounting services ..................................... 48,831 Account maintenance and distribution fees--Class C ...... 47,440 Account maintenance and distribution fees--Class ........ 41,491 Professional fees ....................................... 32,178 Printing and shareholder reports ........................ 28,028 Registration fees ....................................... 27,607 Account maintenance fees--Class A ....................... 27,598 Transfer agent fees--Class A ............................ 17,516 Transfer agent fees--Class I ............................ 17,321 Transfer agent fees--Class C ............................ 10,989 Transfer agent fees--Class B ............................ 10,664 Trustees' fees and expenses ............................. 6,748 Custodian fees .......................................... 6,625 Pricing fees ............................................ 3,220 Other ................................................... 13,335 ------------ Total expenses before reimbursement ..................... 804,138 Reimbursement of expenses ............................... (14,744) ------------ Total expenses after reimbursement ...................... 789,394 ------------ Investment income--net .................................. 3,024,283 ------------ ============================================================================================================ Realized & Unrealized Gain (Loss) on Investments--Net - ------------------------------------------------------------------------------------------------------------ Realized gain on investments--net ....................... 884,289 Change in unrealized appreciation on investments--net ... (3,898,398) ------------ Total realized and unrealized loss on investments--net .. (3,014,109) ------------ Net Increase in Net Assets Resulting from Operations .... $ 10,174 ============ See Notes to Financial Statements. 12 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Statements of Changes in Net Assets For the Six For the Months Ended Year Ended April 30, October 31, Increase (Decrease) in Net Assets: 2004 2003 ============================================================================================================ Operations - ------------------------------------------------------------------------------------------------------------ Investment income--net .................................. $ 3,024,283 $ 4,982,627 Realized gain on investments--net ....................... 884,289 303,948 Change in unrealized appreciation on investments--net ... (3,898,398) 773,222 ---------------------------- Net increase in net assets resulting from operations .... 10,174 6,059,797 ---------------------------- ============================================================================================================ Dividends & Distributions to Shareholders - ------------------------------------------------------------------------------------------------------------ Investment income--net: Class A .............................................. (999,508) (1,809,005) Class B .............................................. (471,910) (1,195,772) Class C .............................................. (539,915) (652,966) Class I .............................................. (1,011,230) (1,314,527) Realized gain on investments--net: Class A .............................................. (142,656) (316,356) Class B .............................................. (75,712) (249,900) Class C .............................................. (80,956) (85,807) Class I .............................................. (132,414) (217,583) ---------------------------- Net decrease in net assets resulting from dividends and distributions to shareholders .......................... (3,454,301) (5,841,916) ---------------------------- ============================================================================================================ Beneficial Interest Transactions - ------------------------------------------------------------------------------------------------------------ Net increase in net assets derived from beneficial interest transactions .................................. 23,651,373 26,532,366 ---------------------------- ============================================================================================================ Net Assets - ------------------------------------------------------------------------------------------------------------ Total increase in net assets ............................ 20,207,246 26,750,247 Beginning of period ..................................... 153,810,174 127,059,927 ---------------------------- End of period* .......................................... $174,017,420 $153,810,174 ---------------------------- * Undistributed investment income--net ............... $ 62,543 $ 60,823 ============================ See Notes to Financial Statements. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 13 [LOGO] Merrill Lynch Investment Managers Financial Highlights Class A ----------------------------------------------------------------------- The following per share data and ratios have been derived For the Six For the from information provided in the financial statements. Months Ended Year Ended October 31,*** April 30, ---------------------------------------------------- Increase (Decrease) in Net Asset Value: 2004 2003 2002 2001 2000 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ... $ 10.71 $ 10.69 $ 10.60 $ 10.04 $ 9.74 -------------------------------------------------------------------- Investment income--net ................. .20+ .40+ .39 .42 .43 Realized and unrealized gain (loss) on investments--net ................... (.17) .09 .13 .56 .30 -------------------------------------------------------------------- Total from investment operations ....... .03 .49 .52 .98 .73 -------------------------------------------------------------------- Less dividends and distributions: Investment income--net .............. (.20) (.40) (.39) (.42) (.43) Realized gain on investments--net ... (.03) (.07) (.04) -- -- -------------------------------------------------------------------- Total dividends and distributions ...... (.23) (.47) (.43) (.42) (.43) -------------------------------------------------------------------- Net asset value, end of period ......... $ 10.51 $ 10.71 $ 10.69 $ 10.60 $ 10.04 ==================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ..... .18%@ 4.68% 5.05% 9.98% 7.69% ==================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ......... .89%* .95% .99% 1.01% .90% ==================================================================== Expenses ............................... .91%* .97% 1.00% 1.01% .90% ==================================================================== Investment income--net ................. 3.62%* 3.70% 3.73% 4.10% 4.37% ==================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $54,618 $51,786 $45,563 $40,269 $34,930 ==================================================================== Portfolio turnover ..................... 101.97% 214.92% 201.37% 169.70% 210.04% ==================================================================== * Annualized. ** Total investment returns exclude the effects of sales charges. *** Effective April 14, 2003, Class D Shares were redesignated Class A Shares. + Based on average shares outstanding. @ Aggregate total investment return. See Notes to Financial Statements. 14 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Financial Highlights (continued) Class B ---------------------------------------------------------------------- The following per share data and ratios have been derived For the Six For the from information provided in the financial statements. Months Ended Year Ended October 31, April 30, ---------------------------------------------------- Increase (Decrease) in Net Asset Value: 2004 2003 2002 2001 2000 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ... $ 10.71 $ 10.69 $ 10.60 $ 10.04 $ 9.75 -------------------------------------------------------------------- Investment income--net ................. .18+ .38+ .37 .40 .41 Realized and unrealized gain (loss) on investments--net ................... (.16) .09 .13 .56 .29 -------------------------------------------------------------------- Total from investment operations ....... .02 .47 .50 .96 .70 -------------------------------------------------------------------- Less dividends and distributions: Investment income--net .............. (.18) (.38) (.37) (.40) (.41) Realized gain on investments--net ... (.03) (.07) (.04) -- -- -------------------------------------------------------------------- Total dividends and distributions ...... (.21) (.45) (.41) (.40) (.41) -------------------------------------------------------------------- Net asset value, end of period ......... $ 10.52 $ 10.71 $ 10.69 $ 10.60 $ 10.04 ==================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ..... .17%@ 4.46% 4.83% 9.75% 7.35% ==================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ......... 1.10%* 1.17% 1.21% 1.22% 1.12% ==================================================================== Expenses ............................... 1.12%* 1.18% 1.21% 1.22% 1.12% ==================================================================== Investment income--net ................. 3.41%* 3.48% 3.53% 3.89% 4.16% ==================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $24,499 $28,678 $37,155 $37,875 $46,571 ==================================================================== Portfolio turnover ..................... 101.97% 214.92% 201.37% 169.70% 210.04% ==================================================================== * Annualized. ** Total investment returns exclude the effects of sales charges. + Based on average shares outstanding. @ Aggregate total investment return. See Notes to Financial Statements. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 15 [LOGO] Merrill Lynch Investment Managers Financial Highlights (continued) Class C ---------------------------------------------------------------------- The following per share data and ratios have been derived For the Six For the from information provided in the financial statements. Months Ended Year Ended October 31, April 30, ---------------------------------------------------- Increase (Decrease) in Net Asset Value: 2004 2003 2002 2001 2000 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ... $ 10.71 $ 10.69 $ 10.59 $ 10.04 $ 9.74 -------------------------------------------------------------------- Investment income--net ................. .18+ .38+ .37 .40 .41 Realized and unrealized gain (loss) on investments--net ................... (.16) .09 .14 .55 .30 -------------------------------------------------------------------- Total from investment operations ....... .02 .47 .51 .95 .71 -------------------------------------------------------------------- Less dividends and distributions: Investment income--net .............. (.18) (.38) (.37) (.40) (.41) Realized gain on investments--net ... (.03) (.07) (.04) -- -- -------------------------------------------------------------------- Total dividends and distributions ...... (.21) (.45) (.41) (.40) (.41) -------------------------------------------------------------------- Net asset value, end of period ......... $ 10.52 $ 10.71 $ 10.69 $ 10.59 $ 10.04 ==================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ..... .17%@ 4.46% 4.93% 9.64% 7.45% ==================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ......... 1.10%* 1.15% 1.20% 1.22% 1.12% ==================================================================== Expenses ............................... 1.11%* 1.17% 1.20% 1.22% 1.12% ==================================================================== Investment income--net ................. 3.41%* 3.50% 3.47% 3.89% 4.16% ==================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $32,045 $28,974 $10,276 $ 2,462 $ 3,744 ==================================================================== Portfolio turnover ..................... 101.97% 214.92% 201.37% 169.70% 210.04% ==================================================================== * Annualized. ** Total investment returns exclude the effects of sales charges. + Based on average shares outstanding. @ Aggregate total investment return. See Notes to Financial Statements. 16 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Financial Highlights (concluded) Class I ---------------------------------------------------------------------- The following per share data and ratios have been derived For the Six For the from information provided in the financial statements. Months Ended Year Ended October 31,*** April 30, ---------------------------------------------------- Increase (Decrease) in Net Asset Value: 2004 2003 2002 2001 2000 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ... $ 10.71 $ 10.69 $ 10.60 $ 10.05 $ 9.75 -------------------------------------------------------------------- Investment income--net ................. .20+ .40+ .40 .43 .44 Realized and unrealized gain (loss) on investments--net ................... (.16) .10 .13 .55 .30 -------------------------------------------------------------------- Total from investment operations ....... .04 .50 .53 .98 .74 -------------------------------------------------------------------- Less dividends and distributions: Investment income--net .............. (.20) (.41) (.40) (.43) (.44) Realized gain on investments--net ... (.03) (.07) (.04) -- -- -------------------------------------------------------------------- Total dividends and distributions ...... (.23) (.48) (.44) (.43) (.44) -------------------------------------------------------------------- Net asset value, end of period ......... $ 10.52 $ 10.71 $ 10.69 $ 10.60 $ 10.05 ==================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ..... .32%@ 4.77% 5.16% 9.98% 7.80% ==================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses, net of reimbursement ......... .79%* .85% .89% .90% .80% ==================================================================== Expenses ............................... .81%* .87% .90% .90% .80% ==================================================================== Investment income--net ................. 3.71%* 3.80% 3.84% 4.21% 4.47% ==================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) $62,856 $44,372 $34,066 $35,538 $51,675 ==================================================================== Portfolio turnover ..................... 101.97% 214.92% 201.37% 169.70% 210.04% ==================================================================== * Annualized. ** Total investment returns exclude the effects of sales charges. *** Effective April 14, 2003, Class A Shares were redesignated Class I Shares. + Based on average shares outstanding. @ Aggregate total investment return. See Notes to Financial Statements. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 17 [LOGO] Merrill Lynch Investment Managers Notes to Financial Statements 1. Significant Accounting Policies: Merrill Lynch Municipal Intermediate Term Fund (the "Fund") is presently the only series of Merrill Lynch Municipal Series Trust (the "Trust"). The Fund is registered under the Investment Company Act of 1940, as amended, as a 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. Actual results may differ from these 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 Fund offers multiple classes of shares. Shares of Class A and Class I are sold with a front-end sales charge. Shares of Class B and Class C may be subject to a contingent deferred sales charge. All classes of shares have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that Class A, Class B and Class C Shares bear certain expenses related to the account maintenance of such shares, and Class B and Class C Shares also bear certain expenses related to the distribution of such shares. Each class has exclusive voting rights with respect to matters relating to its account maintenance and distribution expenditures. Income, expenses (other than expenses attributable to a specific class) and realized and unrealized gains and losses on investments are allocated daily to each class based on its relative net assets. The following is a summary of significant accounting policies followed by the Fund. (a) Valuation of investments -- Municipal bonds are traded primarily in the over-the-counter markets and are valued at the last available bid price in the over-the-counter market or on the basis of yield equivalents as obtained by the Fund's pricing service from one or more dealers that make markets in the securities. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their closing prices as of the close of such exchanges. Options written or purchased are valued at the last sale price in the case of exchange-traded options. In the case of options traded in the over-the-counter market, valuation is the last asked price (options written) or the last bid price (options purchased). Swap agreements are valued by quoted fair values received daily by the Fund from the counterparty. Short-term investments with a remaining maturity of sixty days or less are valued at amortized cost, which approximates market value. Securities and assets for which market quotations are not readily available are valued at fair value as determined in good faith by or under the direction of the Board of Trustees of the Fund, including valuations furnished by a pricing service retained by the Fund, which may utilize a matrix system for valuations. The procedures of the pricing service and its valuations are reviewed by the officers of the Fund under the general supervision of the Board of Trustees. (b) 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. o Financial futures contracts -- The Fund may purchase or sell financial futures contracts and options on such futures contracts. Futures contracts are contracts for delayed delivery of securities at a specific future date and at a specific price or yield. Upon entering into a contract, the Fund deposits and maintains as collateral such initial margin as required by the exchange on which the transaction is effected. Pursuant to the contract, the Fund agrees to receive from or pay to the broker an amount of cash equal to the daily fluctuation in value of the contract. Such receipts or payments are known as variation margin and are recorded by the Fund as unrealized gains or losses. When the contract is closed, the Fund records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed. 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. When the agreement is closed, the Fund records a realized gain or loss in an amount equal to the value of the agreement. 18 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Notes to Financial Statements (continued) (c) 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. (d) 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. Dividend income is recorded on the ex-dividend dates. Interest income is recognized on the accrual basis. The Fund amortizes all premiums and discounts on debt securities. (e) Prepaid registration fees -- Prepaid registration fees are charged to expense as the related shares are issued. (f) 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. 2. Investment Advisory Agreement and Transactions with Affiliates: The Fund has entered into an Investment Advisory Agreement with Merrill Lynch Investment Managers, L.P. ("MLIM"). The general partner of MLIM is Princeton Services, Inc. ("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited partner. The Fund has also entered into a Distribution Agreement and Distribution Plans with FAM Distributors, Inc. ("FAMD" or the "Distributor"), which is a wholly-owned subsidiary of Merrill Lynch Group, Inc. MLIM 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 of ..55% on the average daily value of the Fund's net assets. For the six months ended April 30, 2004, MLIM reimbursed the Fund in the amount of $14,744. Pursuant to the Distribution Plans adopted by the Fund in accordance with Rule 12b-1 under the Investment Company Act of 1940, the Fund pays the Distributor ongoing account maintenance and distribution fees. The fees are accrued daily and paid monthly at annual rates based upon the average daily net assets of the shares as follows: - -------------------------------------------------------------------------------- Account Distribution Maintenance Fee Fee - -------------------------------------------------------------------------------- Class A .................................. .10% -- Class B .................................. .20% .10% Class C .................................. .20% .10% - -------------------------------------------------------------------------------- Pursuant to a sub-agreement with the Distributor, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), a subsidiary of ML & Co., also provides account maintenance and distribution services to the Fund. The ongoing account maintenance fee compensates the Distributor and MLPF&S for providing account maintenance services to Class A, Class B and Class C shareholders. The ongoing distribution fee compensates the Distributor and MLPF&S for providing shareholder and distribution-related services to Class B and Class C shareholders. For the six months ended April 30, 2004, FAMD earned underwriting discounts and MLPF&S earned dealer concessions on sales of the Fund's Class A and Class I Shares as follows: - -------------------------------------------------------------------------------- FAMD MLPF&S - -------------------------------------------------------------------------------- Class A .............................. $ 234 $7,082 Class I .............................. $ 42 $ 936 - -------------------------------------------------------------------------------- For the six months ended April 30, 2004, MLPF&S received contingent deferred sales charges of $8,614 and $5,839 relating to transactions in Class B and Class C Shares, respectively. In addition, MLPF&S received $15,312 in commissions on the execution of portfolio security transactions for the Fund for the six months ended April 30, 2004. Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is the Fund's transfer agent. For the six months ended April 30, 2004, the Fund reimbursed MLIM $1,696 for certain accounting services. Certain officers and/or trustees of the Fund are officers and/or directors of MLIM, PSI, FAMD, FDS, and/or ML & Co. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 19 [LOGO] Merrill Lynch Investment Managers Notes to Financial Statements (continued) 3. Investments: Purchases and sales of investments, excluding short-term securities, for the six months ended April 30, 2004 were $167,442,383 and $153,940,612, respectively. Net realized gains (losses) for the six months ended April 30, 2004 and net unrealized appreciation as of April 30, 2004, were as follows: - -------------------------------------------------------------------------------- Realized Unrealized Gains (Losses) Appreciation - -------------------------------------------------------------------------------- Long-term investments .................. $ 1,132,640 $ 4,550,255 Forward interest rate swaps ............ (248,351) 219,857 -------------------------------- Total .................................. $ 884,289 $ 4,770,112 ================================ As of April 30, 2004, net unrealized appreciation for Federal income tax purposes aggregated $4,553,284, of which $6,497,338 related to appreciated securities and $1,944,054 related to depreciated securities. The aggregate cost of investments at April 30, 2004 for Federal income tax purposes was $170,006,126. 4. Beneficial Interest Transactions: Net increase in net assets derived from beneficial interest transactions was $23,651,373 and $26,532,366 for the six months ended April 30, 2004 and the year ended October 31, 2003, respectively. Transactions in shares of beneficial interest for each class were as follows: - -------------------------------------------------------------------------------- Class A Shares for the Six Dollar Months Ended April 30, 2004 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 634,086 $ 6,853,253 Shares issued to shareholders in reinvestment of dividends and distributions .................... 63,101 684,042 Automatic conversion of shares ......... 240,202 2,611,261 -------------------------------- Total issued ........................... 937,389 10,148,556 Shares redeemed ........................ (578,766) (6,264,847) -------------------------------- Net increase ........................... 358,623 $ 3,883,709 ================================ - -------------------------------------------------------------------------------- Class A Shares for the Year Dollar Ended October 31, 2003 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 941,647 $ 10,053,844 Shares issued to shareholders in reinvestment of dividends and distributions .................... 117,720 1,260,630 Automatic conversion of shares ......... 514,940 5,505,804 -------------------------------- Total issued ........................... 1,574,307 16,820,278 Shares redeemed ........................ (1,002,408) (10,683,694) -------------------------------- Net increase ........................... 571,899 $ 6,136,584 ================================ - -------------------------------------------------------------------------------- Class B Shares for the Six Dollar Months Ended April 30, 2004 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 216,832 $ 2,345,734 Shares issued to shareholders in reinvestment of dividends and distributions .................... 30,246 327,972 -------------------------------- Total issued ........................... 247,078 2,673,706 Automatic conversion of shares ......... (240,078) (2,611,261) Shares redeemed ........................ (354,947) (3,864,294) -------------------------------- Net decrease ........................... (347,947) $ (3,801,849) ================================ - -------------------------------------------------------------------------------- Class B Shares for the Year Dollar Ended October 31, 2003 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 708,218 $ 7,598,941 Shares issued to shareholders in reinvestment of dividends and distributions .................... 84,893 909,367 -------------------------------- Total issued ........................... 793,111 8,508,308 Automatic conversion of shares ......... (514,786) (5,505,804) Shares redeemed ........................ (1,077,205) (11,550,698) -------------------------------- Net decrease ........................... (798,880) $ (8,548,194) ================================ - -------------------------------------------------------------------------------- Class C Shares for the Six Dollar Months Ended April 30, 2004 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 715,025 $ 7,754,565 Shares issued to shareholders in reinvestment of dividends and distributions .................... 33,510 363,280 -------------------------------- Total issued ........................... 748,535 8,117,845 Shares redeemed ........................ (406,519) (4,417,115) -------------------------------- Net increase ........................... 342,016 $ 3,700,730 ================================ - -------------------------------------------------------------------------------- Class C Shares for the Year Dollar Ended October 31, 2003 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 2,103,435 $ 22,573,791 Shares issued to shareholders in reinvestment of dividends and distributions .................... 42,072 450,697 -------------------------------- Total issued ........................... 2,145,507 23,024,488 Shares redeemed ........................ (401,742) (4,294,871) -------------------------------- Net increase ........................... 1,743,765 $ 18,729,617 ================================ 20 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 Notes to Financial Statements (concluded) - -------------------------------------------------------------------------------- Class I Shares for the Six Dollar Months Ended April 30, 2004 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 2,488,557 $ 26,988,074 Shares issued to shareholders in reinvestment of dividends and distributions .................... 40,715 441,559 -------------------------------- Total issued ........................... 2,529,272 27,429,633 Shares redeemed ........................ (695,942) (7,560,850) -------------------------------- Net increase ........................... 1,833,330 $ 19,868,783 ================================ - -------------------------------------------------------------------------------- Class I Shares for the Year Dollar Ended October 31, 2003 Shares Amount - -------------------------------------------------------------------------------- Shares sold ............................ 2,057,821 $ 22,041,935 Shares issued to shareholders in reinvestment of dividends and distributions .................... 85,313 913,926 -------------------------------- Total issued ........................... 2,143,134 22,955,861 Shares redeemed ........................ (1,188,025) (12,741,502) -------------------------------- Net increase ........................... 955,109 $ 10,214,359 ================================ 5. Short-Term Borrowings: The Fund, along with certain other funds managed by MLIM and its affiliates, is a party to a $500,000,000 credit agreement with Bank One, N.A. and certain other lenders. The Fund may borrow under the credit agreement to fund shareholder redemptions and for other lawful purposes other than for leverage. The Fund may borrow up to the maximum amount allowable under the Fund's current prospectus and statement of additional information, subject to various other legal, regulatory or contractual limits. The Fund pays a commitment fee of .09% per annum based on the Fund's pro rata share of the unused portion of the facility. Amounts borrowed under the credit agreement bear interest at a rate equal to, at each fund's election, the Federal Funds rate plus .50% or a base rate as determined by Bank One, N.A. On November 28, 2003, the credit agreement was renewed for one year under the same terms. The Fund did not borrow under the credit agreement during the six months ended April 30, 2004. 6. Subsequent Event: At the request of the Fund's Board of Trustees, management has agreed to contractually waive 5 basis points of the investment advisory fee effective June 1, 2004. MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 21 [LOGO] Merrill Lynch Investment Managers Electronic Delivery The Fund offers 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. 22 MERRILL LYNCH MUNICIPAL INTERMEDIATE TERM FUND APRIL 30, 2004 [LOGO] Merrill Lynch Investment Managers www.mlim.ml.com 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. Past performance results shown in this report should not be considered a representation of future performance. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. 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 1-800-MER-FUND (1-800-637-3863); (2) on www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's website at http://www.sec.gov. Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch Municipal Series Trust Box 9011 Princeton, NJ 08543-9011 #10437 -- 4/04 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 Item 6 - Schedule of Investments - Not Applicable Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable Item 8 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 9 - Submission of Matters to a Vote of Security Holders - Not Applicable Item 10 - Controls and Procedures 10(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. 10(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal half-year of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 11 - Exhibits attached hereto 11(a)(1) - Code of Ethics - Not Applicable to this semi-annual report 11(a)(2) - Certifications - Attached hereto 11(a)(3) - Not Applicable 11(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. Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch Municipal Series Trust By: /s/ Terry K. Glenn ------------------------------- Terry K. Glenn, President of Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch Municipal Series Trust Date: June 18, 2004 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 Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch Municipal Series Trust Date: June 18, 2004 By: /s/ Donald C. Burke ------------------------------- Donald C. Burke, Chief Financial Officer of Merrill Lynch Municipal Intermediate Term Fund of Merrill Lynch Municipal Series Trust Date: June 18, 2004