MERRILL LYNCH MINNESOTA MUN BOND FD OF MERRILL LYNCH MULTI S
485B24E, 1996-10-28
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<PAGE>
 
    
 AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 28, 1996     
 
                                                SECURITIES ACT FILE NO. 33-44734
                                        INVESTMENT COMPANY ACT FILE NO. 811-4375
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                               ----------------
                                   FORM N-1A
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933          [X]
                         PRE-EFFECTIVE AMENDMENT NO.                         [_]
                                                                             
                      POST-EFFECTIVE AMENDMENT NO. 5                         [X]
                                     AND/OR
        REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940      [X]
 
                               ----------------
                                                                             
                             AMENDMENT NO. 127                               [X]
                        (Check appropriate box or boxes)
 
                               ----------------
                  MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND
              OF MERRILL LYNCH MULTI-STATE MUNICIPAL SERIES TRUST
               (Exact Name of Registrant as Specified in Charter)
 
              800 SCUDDERS MILL ROAD
              PLAINSBORO, NEW JERSEY                            08536
     (Address of Principal Executive Offices)                (Zip Code)
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE (609) 282-2800
                                 ARTHUR ZEIKEL
                MERRILL LYNCH MULTI-STATE MUNICIPAL SERIES TRUST
                 800 SCUDDERS MILL ROAD, PLAINSBORO, NEW JERSEY
        MAILING ADDRESS: P.O. BOX 9011, PRINCETON, NEW JERSEY 08543-9011
                    (Name and Address of Agent for Service)
 
                               ----------------
                                   COPIES TO:
       COUNSEL FOR THE TRUST:                   PHILIP L. KIRSTEIN, ESQ.
                                                  FUND ASSET MANAGEMENT
        BROWN & WOOD LLP                              P.O. BOX 9011          
       ONE WORLD TRADE CENTER               PRINCETON, NEW JERSEY 08543-9011  
    NEW YORK, NEW YORK 10048-0557          
  ATTENTION: THOMAS R. SMITH, JR., ESQ.
             BRIAN M. KAPLOWITZ, ESQ.
 
                               ----------------
 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)
                        
                     [_]immediately upon filing pursuant to paragraph
                        (b)     
                        
                     [X]on October 29, 1996 pursuant to paragraph (b)
                            
                     [_]60 days after filing pursuant to paragraph
                        (a)(1)
                     [_]on (date) pursuant to paragraph (a)(1)
                     [_]75 days after filing pursuant to paragraph
                        (a)(2)
                     [_]on (date) pursuant to paragraph (a)(2) of Rule
                        485.
 
            IF APPROPRIATE, CHECK THE FOLLOWING BOX:
                     [_]this post-effective amendment designates a new
                       effective date for a previously filed post-
                       effective amendment.
 
                               ----------------
   
  THE REGISTRANT HAS REGISTERED AN INDEFINITE NUMBER OF ITS SHARES UNDER THE
SECURITIES ACT OF 1933 PURSUANT TO RULE 24f-2 UNDER THE INVESTMENT COMPANY ACT
OF 1940. THE NOTICE REQUIRED BY SUCH RULE FOR THE REGISTRANT'S MOST RECENT
FISCAL YEAR WAS FILED ON SEPTEMBER 25, 1996.     
 
        CALCULATION OF REGISTRATION FEE UNDER THE SECURITIES ACT OF 1933
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<TABLE>   
<CAPTION>
                           AMOUNT OF   PROPOSED MAXIMUM PROPOSED MAXIMUM
  TITLE OF SECURITIES     SHARES BEING  OFFERING PRICE     AGGREGATE        AMOUNT OF
    BEING REGISTERED       REGISTERED      PER UNIT      OFFERING PRICE  REGISTRATION FEE
- -----------------------------------------------------------------------------------------
<S>                       <C>          <C>              <C>              <C>
Shares of Beneficial In-
 terest (par
 value $.10 per
 share)................    1,097,703        $10.76          $329,998           $100
</TABLE>    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
*(1) The calculation of the maximum aggregate offering price is made pursuant
     to Rule 24e-2 under the Investment Company Act of 1940.
   
 (2) The total amount of securities redeemed or repurchased during Registrant's
     previous fiscal year was 1,067,034 Shares of Beneficial Interest.     
   
 (3) None of the Shares described in (2) above have been used for reduction
     pursuant to Rule 24e-2(a) or Rule 24f-2(c) under the Investment Company
     Act of 1940 in previous filings during Registrant's current fiscal year.
            
 (4) 1,067,034 of the Shares redeemed during Registrant's previous fiscal year
     are being used for the reduction of the registration fee in this amendment
     to the Registration Statement.     
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
                 MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND OF
                MERRILL LYNCH MULTI-STATE MUNICIPAL SERIES TRUST
 
                      REGISTRATION STATEMENT ON FORM N-1A
 
                             CROSS REFERENCE SHEET
 
<TABLE>
<CAPTION>
 N-1A
 ITEM NO.                                               LOCATION
 --------                                               --------
 <C>         <S>                         <C>
 PART A
  Item  1.   Cover Page...............   Cover Page
  Item  2.   Synopsis.................   Fee Table
             Condensed Financial
  Item  3.   Information..............   Financial Highlights; Performance Data
  Item  4.   General Description of      
             Registrant...............   Investment Objective and Policies;  
                                          Additional Information              
  Item  5.   Management of the Fund...   Fee Table; Management of the Trust;
                                          Inside Back Cover Page
  Item  5A.  Management's Discussion
             of Fund  Performance.....   Not Applicable
  Item  6.   Capital Stock and Other     
             Securities...............   Cover Page; Merrill Lynch Select  
                                          Pricing SM System; Additional    
                                          Information                       
  Item  7.   Purchase of Securities      
             Being Offered............   Cover Page; Fee Table; Merrill Lynch  
                                          Select Pricing SM System; Purchase of
                                          Shares; Shareholder Services;        
                                          Additional Information; Inside Back  
                                          Cover Page                            
  Item  8.   Redemption or Repurchase.   Fee Table; Merrill Lynch Select
                                          Pricing SM System; Purchase of Shares;
                                          Redemption of Shares
  Item  9.   Pending Legal               
             Proceedings..............   Not Applicable 
 
PART B
  Item 10.   Cover Page...............   Cover Page
  Item 11.   Table of Contents........   Back Cover Page
  Item 12.   General Information and     
             History..................   Additional Information 
  Item 13.   Investment Objective and    
             Policies.................   Investment Objective and Policies 
  Item 14.   Management of the Fund...   Management of the Trust
  Item 15.   Control Persons and
              Principal Holders of       
              Securities..............   Management of the Trust; General    
                                          Information--Additional Information 
  Item 16.   Investment Advisory and     
             Other Services...........   Management of the Trust; Purchase of
                                          Shares; General Information         
  Item 17.   Brokerage Allocation and    
             Other Practices..........   Portfolio Transactions 
  Item 18.   Capital Stock and Other     
             Securities...............   General Information--Description of 
                                          Series and Shares                   
  Item 19.   Purchase, Redemption and
              Pricing of Securities      
              Being Offered...........   Purchase of Shares; Redemption of  
                                          Shares;  Determination of Net Asset
                                          Value; Shareholder Services        
  Item 20.   Tax Status...............   Distributions and Taxes
  Item 21.   Underwriters.............   Purchase of Shares
  Item 22.   Calculation of              
             Performance Data.........   Performance Data 
  Item 23.   Financial Statements.....   Financial Statements
</TABLE>
 
PART C
  Information required to be included in Part C is set forth under the
appropriate Item, so numbered, in Part C to this Registration Statement.
<PAGE>
 
PROSPECTUS
   
OCTOBER 29, 1996     
 
                  MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND
               MERRILL LYNCH MULTI-STATE MUNICIPAL SERIES TRUST
  P.O. BOX 9011, PRINCETON, NEW JERSEY 08543-9011 . PHONE NO. (609) 282-2800
   
  Merrill Lynch Minnesota Municipal Bond Fund (the "Fund") is a mutual fund
seeking to provide shareholders with as high a level of income exempt from
Federal and Minnesota personal income taxes as is consistent with prudent
investment management. The Fund invests primarily in a non-diversified
portfolio of long-term, investment grade obligations of the State of
Minnesota, its political or governmental subdivisions, municipalities,
governmental agencies or instrumentalities, or of Indian tribal governments of
tribes located in Minnesota, the interest on which is exempt from Federal and
Minnesota personal income taxes ("Minnesota Municipal Bonds"). Dividends paid
by the Fund are exempt from Federal and Minnesota personal income taxes to the
extent they are paid from interest on Minnesota Municipal Bonds, provided 95%
or more of the exempt-interest dividends paid by the Fund is derived from
interest on such Minnesota Municipal Bonds. The Fund may invest in certain
tax-exempt securities classified as "private activity bonds" that may subject
certain investors in the Fund to an alternative minimum tax. At times, the
Fund may seek to hedge its portfolio through the use of futures transactions
and options. There can be no assurance that the investment objective of the
Fund will be realized. For more information on the Fund's investment objective
and policies, please see "Investment Objective and Policies" on page 10.     
 
                               ----------------
  Pursuant to the Merrill Lynch Select Pricing SM System, the Fund offers four
classes of shares each with a different combination of sales charges, ongoing
fees and other features. The Merrill Lynch Select Pricing SM System permits an
investor to choose the method of purchasing shares that the investor believes
is most beneficial given the amount of the purchase, the length of time the
investor expects to hold the shares and other relevant circumstances. See
"Merrill Lynch Select Pricing SM System" on page 4.
 
  Shares may be purchased directly from Merrill Lynch Funds Distributor, Inc.
(the "Distributor"), P.O. Box 9081, Princeton, New Jersey 08543-9081 [(609)
282-2800], and other securities dealers which have entered into selected
dealer agreements with the Distributor, including Merrill Lynch, Pierce,
Fenner & Smith Incorporated ("Merrill Lynch"). The minimum initial purchase is
$1,000 and the minimum subsequent purchase is $50. Merrill Lynch may charge
its customers a processing fee (presently $4.85) for confirming purchases and
repurchases. Purchases and redemptions directly through the Fund's Transfer
Agent are not subject to the processing fee. See "Purchase of Shares" and
"Redemption of Shares".
 
                               ----------------
THESE SECURITIES HAVE  NOT BEEN APPROVED OR DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE  SECURITIES COMMISSION NOR HAS THE SECURITIES
 AND EXCHANGE COMMISSION  OR ANY STATE SECURITIES  COMMISSION PASSED UPON THE
 ACCURACY OR ADEQUACY OF THIS  PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY
  IS A CRIMINAL OFFENSE.
   
  This Prospectus is a concise statement of information about the Fund that is
relevant to making an investment in the Fund. This Prospectus should be
retained for future reference. A statement containing additional information
about the Fund, dated October 29, 1996 (the "Statement of Additional
Information"), has been filed with the Securities and Exchange Commission (the
"Commission") and is available, without charge, by calling or by writing
Merrill Lynch Multi-State Municipal Series Trust (the "Trust") at the above
telephone number or address. The Statement of Additional Information is hereby
incorporated by reference into this Prospectus. The Fund is a separate series
of the Trust, an open-end management investment company organized as a
Massachusetts business trust.     
                               ----------------
                        FUND ASSET MANAGEMENT--MANAGER
 
              MERRILL LYNCH FUNDS DISTRIBUTOR, INC.--DISTRIBUTOR
<PAGE>
 
                                   FEE TABLE
 
  A general comparison of the sales arrangements and other nonrecurring and
recurring expenses applicable to shares of the Fund follows:
 
<TABLE>   
<CAPTION>
                             CLASS A(a)        CLASS B(b)       CLASS C CLASS D
                             ----------        ----------       ------- -------
<S>                          <C>         <C>                    <C>     <C>
SHAREHOLDER TRANSACTION EX-
 PENSES:
 Maximum Sales Charge
  Imposed on Purchases
  (as a percentage of
  offering price)..........    4.00%(c)           None           None    4.00%(c)
 Sales Charge Imposed on
  Dividend Reinvestments...     None              None           None     None
 Deferred Sales Charge (as
  a percentage of original
  purchase price or             
  redemption proceeds,          
  whichever is lower)......     None(d)  4.0% during the first    1.0%    None(d)
                                                 year,          for one         
                                            decreasing 1.0%     year(f)         
                                                annually                        
                                           thereafter to 0.0%                   
                                               after the                        
                                             fourth year(e) 
 Exchange Fee..............     None              None           None     None
ANNUAL FUND OPERATING EX-
 PENSES
 (AS A PERCENTAGE OF AVER-
 AGE NET ASSETS):
 Management Fees(g)........    0.55%             0.55%           0.55%   0.55%
 12b-1 Fees(h):
 Account Maintenance Fees..     None             0.25%           0.25%   0.10%
 Distribution Fees.........     None             0.25%           0.35%    None
                                            (Class B shares
                                               convert to
                                             Class D shares
                                             automatically
                                          after approximately
                                               ten years,
                                            and cease being
                                               subject to
                                         distribution fees and
                                                 become
                                            subject to lower
                                                account
                                            maintenance fees)
 Other Expenses:
 Custodial Fees............     .01%              .01%             .01%   .01%
 Shareholder Servicing
  Costs(i).................     .06%              .07%             .08%   .06%
 Miscellaneous.............     .33%              .33%             .33%   .33%
                                ----             -----            -----  -----
  Total Other Expenses.....     .40%              .41%             .42%   .40%
                                ----             -----            -----  -----
 Total Fund Operating Ex-       .95%             1.46%            1.57%  1.05%
  penses+..................     ====             =====            =====  =====
</TABLE>    
- --------
   
(a) Class A shares are sold to a limited group of investors including existing
    Class A shareholders and certain participants in fee-based programs. See
    "Purchase of Shares--Initial Sales Charge Alternatives--Class A and Class
    D Shares"--page 24 and "Shareholder Services--Fee-Based Programs"--page
    35.     
   
(b) Class B shares convert to Class D shares automatically approximately ten
    years after initial purchase. See "Purchase of Shares--Deferred Sales
    Charge Alternatives--Class B and Class C Shares"--page 26.     
   
(c) Reduced for purchases of $25,000 and over and waived for purchases of
    Class A shares in connection with certain fee-based programs. Class A or
    Class D purchases of $1,000,000 or more may not be subject to an initial
    sales charge. See "Purchase of Shares--Initial Sales Charge Alternatives--
    Class A and Class D Shares"--page 24.     
   
(d) Class A and Class D shares are not subject to a contingent deferred sales
    charge ("CDSC"), except that certain purchases of $1,000,000 or more which
    are not subject to an initial sales charge may instead be subject to a
    CDSC of 1.0% of amounts redeemed within the first year after purchase.
    Such CDSC may be waived in connection with redemptions to fund
    participation in certain fee-based programs. See "Shareholder Services--
    Fee-Based Programs"--page 35.     
 
                                       2
<PAGE>
 
          
(e) The CDSC may be modified in connection with redemptions to fund
    participation in certain fee-based programs. See "Shareholder Services--
    Fee-Based Programs"--page 35.     
   
(f) The CDSC may be waived in connection with redemptions to fund
    participation in certain fee-based programs. See "Shareholder Services--
    Fee-Based Programs"--page 35.     
   
(g) See "Management of the Trust--Management and Advisory Arrangements"--page
    21.     
   
(h) See "Purchase of Shares--Distribution Plans"--page 29.     
   
(i) See "Management of the Trust--Transfer Agency Services"--page 22.     
   
 + For the fiscal year ended July 31, 1996, Fund Asset Management, L.P. ("the
   Manager") voluntarily waived $65,688 of the management fees due from the
   Fund and voluntarily reimbursed the Fund for a portion of other expenses
   (excluding Rule 12b-1 fees). Total Fund Operating Expenses in the fee table
   have been restated to assume the absence of any such waiver or
   reimbursement because the Manager may discontinue or reduce such waiver of
   fees and/or assumption of expenses at any time without notice. For the
   fiscal year ended July 31, 1996, the Manager waived management fees and
   reimbursed expenses totaling .11% for Class A shares, .11% for Class B
   shares, .09% for Class C shares and .11% for Class D shares after which the
   Fund's total expense ratio was .84% for Class A shares, 1.35% for Class B
   shares, 1.48% for Class C shares and .94% for Class D shares.     
 
EXAMPLE:
 
<TABLE>   
<CAPTION>
                                                  CUMULATIVE EXPENSES PAID
                                                     FOR THE PERIOD OF:
                                               -------------------------------
                                               1 YEAR 3 YEARS 5 YEARS 10 YEARS
                                               ------ ------- ------- --------
<S>                                            <C>    <C>     <C>     <C>
An investor would pay the following expenses
 on a $1,000 investment including the maximum
 $40 initial sales charge (Class A and Class D
 shares only) and assuming (1) the Total Fund
 Operating Expenses for each class set forth
 on page 2, (2) a 5% annual return throughout
 the periods and (3) redemption at the end of
 the period:
  Class A.....................................  $49     $69     $90     $152
  Class B.....................................  $55     $66     $80     $175
  Class C.....................................  $26     $50     $86     $187
  Class D.....................................  $50     $72     $96     $163
An investor would pay the following expenses
 on the same $1,000 investment assuming no
 redemption at the end of the period:
  Class A ....................................  $49     $69     $90     $152
  Class B.....................................  $15     $46     $80     $175
  Class C.....................................  $16     $50     $86     $187
  Class D.....................................  $50     $72     $96     $163
</TABLE>    
   
  The foregoing Fee Table is intended to assist investors in understanding the
costs and expenses that a shareholder in the Fund will bear directly or
indirectly. The example set forth above assumes reinvestment of all dividends
and distributions and utilizes a 5% annual rate of return as mandated by
Commission regulations. THE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION
OF PAST OR FUTURE EXPENSES OR ANNUAL RATES OF RETURN, AND ACTUAL EXPENSES OR
ANNUAL RATES OF RETURN MAY BE MORE OR LESS THAN THOSE ASSUMED FOR PURPOSES OF
THE EXAMPLE. Class B and Class C shareholders who hold their shares for an
extended period of time may pay more in Rule 12b-1 distribution fees than the
economic equivalent of the maximum front-end sales charge permitted under the
Conduct Rules of the National Association of Securities Dealers, Inc.
("NASD"). Merrill Lynch may charge its customers a processing fee (presently
$4.85) for confirming purchases and repurchases. Purchases and redemptions
directly through the Fund's Transfer Agent are not subject to the processing
fee. See "Purchase of Shares" and "Redemption of Shares".     
 
                                       3
<PAGE>
 
                    MERRILL LYNCH SELECT PRICING SM SYSTEM
   
  The Fund offers four classes of shares under the Merrill Lynch Select
Pricing SM System. The shares of each class may be purchased at a price equal
to the next determined net asset value per share subject to the sales charges
and ongoing fee arrangements described below. Shares of Class A and Class D
are sold to investors choosing the initial sales charge alternatives, and
shares of Class B and Class C are sold to investors choosing the deferred
sales charge alternatives. The Merrill Lynch Select PricingSM System is used
by more than 50 registered investment companies advised by Merrill Lynch Asset
Management, L.P. ("MLAM") or an affiliate of MLAM, Fund Asset Management, L.P.
("FAM" or the "Manager"). Funds advised by MLAM or FAM which utilize the
Merrill Lynch Select PricingSM System are referred to herein as "MLAM-advised
mutual funds".     
   
  Each Class A, Class B, Class C or Class D share of the Fund represents an
identical interest in the investment portfolio of the Fund and has the same
rights, except that Class B, Class C and Class D shares bear the expenses of
the ongoing account maintenance fees and Class B and Class C shares bear the
expenses of the ongoing distribution fees and the additional incremental
transfer agency costs resulting from the deferred sales charge arrangements.
The deferred sales charges, distribution and account maintenance fees that are
imposed on Class B and Class C shares, as well as the account maintenance fees
that are imposed on the Class D shares, are imposed directly against those
classes and not against all assets of the Fund and, accordingly, such charges
will not affect the net asset value of any other class or have any impact on
investors choosing another sales charge option. Dividends paid by the Fund for
each class of shares will be calculated in the same manner at the same time
and will differ only to the extent that account maintenance and distribution
fees and any incremental transfer agency costs relating to a particular class
are borne exclusively by that class. Each class has different exchange
privileges. See "Shareholder Services--Exchange Privilege".     
 
  Investors should understand that the purpose and function of the initial
sales charges with respect to the Class A and Class D shares are the same as
those of the deferred sales charges with respect to the Class B and Class C
shares in that the sales charges applicable to each class provide for the
financing of the distribution of the shares of the Fund. The distribution-
related revenues paid with respect to a class will not be used to finance the
distribution expenditures of another class. Sales personnel may receive
different compensation for selling different classes of shares.
 
  The following table sets forth a summary of the distribution arrangements
for each class of shares under the Merrill Lynch Select PricingSM System,
followed by a more detailed description of each class and a discussion of the
factors that investors should consider in determining the method of purchasing
shares under the Merrill Lynch Select PricingSM System that the investor
believes is most beneficial under his particular circumstances. More detailed
information as to each class of shares is set forth under the "Purchase of
Shares".
 
                                       4
<PAGE>
 
 
<TABLE>   
<CAPTION>
                                       ACCOUNT
                                     MAINTENANCE DISTRIBUTION
 CLASS       SALES CHARGE(/1/)           FEE         FEE        CONVERSION FACTORS
- ------------------------------------------------------------------------------------
<S>    <C>                           <C>         <C>          <C>
  A        Maximum 4.00% initial         No           No                No
          sales charge(/2/)(/3/)
- ------------------------------------------------------------------------------------
  B    CDSC for a period of 4 years,    0.25%       0.25%      B shares convert to
       at a rate of 4.0% during the                           D shares automatically
        first year, decreasing 1.0%                            after approximately
           annually to 0.0%(/4/)                                  ten years(/5/)
- ------------------------------------------------------------------------------------
  C     1.0% CDSC for one year(/6/)     0.25%       0.35%               No
- ------------------------------------------------------------------------------------
  D        Maximum 4.00% initial        0.10%         No                No
             sales charge(/3/)
</TABLE>    
- --------
   
(1) Initial sales charges are imposed at the time of purchase as a percentage
    of the offering price. CDSCs are imposed if the redemption occurs within
    the applicable CDSC time period. The charge will be assessed on an amount
    equal to the lesser of the proceeds of redemption or the cost of the
    shares being redeemed.     
(2) Offered only to eligible investors. See "Purchase of Shares--Initial Sales
    Charge Alternatives--Class A and Class D Shares--Eligible Class A
    Investors".
   
(3) Reduced for purchases of $25,000 or more and waived for purchases of Class
    A shares in connection with certain fee-based programs. Class A and Class
    D share purchases of $1,000,000 or more may not be subject to an initial
    sales charge but instead may be subject to a 1.0% CDSC if redeemed within
    one year. Such CDSC may be waived in connection with redemptions to fund
    participation in certain fee-based programs. See "Class A" and "Class D"
    below.     
   
(4) The CDSC may be modified in connection with redemptions to fund
    participation in certain fee-based programs.     
   
(5) The conversion period for dividend reinvestment shares and certain fee-
    based programs may be modified. Also, Class B shares of certain other
    MLAM-advised mutual funds into which exchanges may be made have an eight
    year conversion period. If Class B shares of the Fund are exchanged for
    Class B shares of another MLAM-advised mutual fund, the conversion period
    applicable to the Class B shares acquired in the exchange will apply, and
    the holding period for the shares exchanged will be tacked onto the
    holding period for the shares acquired.     
   
(6) The CDSC may be waived in connection with redemptions to fund
    participation in certain fee-based programs.     
   
Class A: Class A shares incur an initial sales charge when they are purchased
         and bear no ongoing distribution or account maintenance fees. Class A
         shares are offered to a limited group of investors and also will be
         issued upon reinvestment of dividends on outstanding Class A shares.
         Investors that currently own Class A shares of the Fund in a
         shareholder account are entitled to purchase additional Class A
         shares of the Fund in that account. Other eligible investors include
         participants in certain fee-based programs. In addition, Class A
         shares will be offered at net asset value to Merrill Lynch & Co.,
         Inc. ("ML & Co.") and its subsidiaries (the term "subsidiaries", when
         used herein with respect to ML & Co., includes MLAM, the Manager and
         certain other entities directly or indirectly wholly-owned and
         controlled by ML & Co.), and their directors and employees, and to
         members of the Boards of MLAM-advised mutual funds. The maximum
         initial sales charge is 4.00%, which is reduced for purchases of
         $25,000 and over and waived for purchases of Class A shares in
         connection with certain fee-based programs. Purchases of $1,000,000
         or more may not be subject to an initial sales charge but if the
         initial sales charge is waived such purchases may be subject to a
         1.0% CDSC if the shares are redeemed within one year after purchase.
         Such CDSC may be waived in connection with redemptions to fund
         participation in certain fee-based programs. Sales charges also are
         reduced under a right of accumulation which takes into account the
         investor's holdings of all classes of all MLAM-advised mutual funds.
         See "Purchase of Shares--Initial Sales Charge Alternatives--Class A
         and Class D Shares".     
 
                                       5
<PAGE>
 
   
Class B: Class B shares do not incur a sales charge when they are purchased,
         but they are subject to an ongoing account maintenance fee of 0.25% of
         the Fund's average net assets attributable to the Class B shares, an
         ongoing distribution fee of 0.25% and a CDSC if they are redeemed
         within four years of purchase. Such CDSC may be modified in connection
         with redemptions to fund participation in certain fee-based programs.
         Approximately ten years after issuance, Class B shares will convert
         automatically into Class D shares of the Fund, which are subject to a
         lower account maintenance fee of 0.10% and no distribution fee; Class
         B shares of certain other MLAM-advised mutual funds into which
         exchanges may be made convert into Class D shares automatically after
         approximately eight years. If Class B shares of the Fund are exchanged
         for Class B shares of another MLAM-advised mutual fund, the conversion
         period applicable to the Class B shares acquired in the exchange will
         apply, as will the Class D account maintenance fee of the acquired
         fund upon the conversion, and the holding period for the shares
         exchanged will be tacked onto the holding period for the shares
         acquired. Automatic conversion of Class B shares into Class D shares
         will occur at least once a month on the basis of the relative net
         asset values of the shares of the two classes on the conversion date,
         without the imposition of any sales load, fee or other charge.
         Conversion of Class B shares to Class D shares will not be deemed a
         purchase or sale of the shares for Federal income tax purposes. Shares
         purchased through reinvestment of dividends on Class B shares also
         will convert automatically to Class D shares. The conversion period
         for dividend reinvestment shares is modified as described under
         "Purchase of Shares--Deferred Sales Charge Alternatives--Class B and
         Class C Shares--Conversion of Class B Shares to Class D Shares".     
   
Class C: Class C shares do not incur a sales charge when they are purchased,
         but they are subject to an ongoing account maintenance fee of 0.25%
         and an ongoing distribution fee of 0.35% of the Fund's average net
         assets attributable to Class C shares. Class C shares are also subject
         to a CDSC of 1.0% if they are redeemed within one year of purchase.
         Such CDSC may be waived in connection with redemptions to fund
         participation in certain fee-based programs. Although Class C shares
         are subject to a CDSC for only one year (as compared to four years for
         Class B), Class C shares have no conversion feature and, accordingly,
         an investor that purchases Class C shares will be subject to account
         maintenance fees and higher distribution fees that will be imposed on
         Class C shares for an indefinite period subject to annual approval by
         the Fund's Board of Trustees and regulatory limitations.     
   
Class D: Class D shares incur an initial sales charge when they are purchased
         and are subject to an ongoing account maintenance fee of 0.10% of the
         Fund's average net assets attributable to Class D shares. Class D
         shares are not subject to an ongoing distribution fee or any CDSC when
         they are redeemed. Purchases of $1,000,000 or more may not be subject
         to an initial sales charge, but if the initial sales charge is waived
         such purchases may be subject to a CDSC of 1.0% if the shares are
         redeemed within one year after purchase. Such CDSC may be waived in
         connection with redemptions to fund participation in certain fee-based
         programs. The schedule of initial sales charges and reductions for
         Class D shares is the same as the schedule for Class A shares, except
         that there is no waiver for purchases of Class D shares in connection
         with certain fee-based programs. Class D shares also will be issued
         upon conversion of Class B shares as described above under "Class B".
         See "Purchase of Shares--Initial Sales Charge Alternatives--Class A
         and Class D Shares".     
 
                                       6
<PAGE>
 
  The following is a discussion of the factors that investors should consider
in determining the method of purchasing shares under the Merrill Lynch Select
PricingSM System that the investor believes is most beneficial under his
particular circumstances.
   
  Initial Sales Charge Alternatives. Investors that prefer an initial sales
charge alternative may elect to purchase Class D shares or, if an eligible
investor, Class A shares. Investors choosing the initial sales charge
alternative who are eligible to purchase Class A shares should purchase Class A
shares rather than Class D shares because there is an account maintenance fee
imposed on Class D shares. Investors qualifying for significantly reduced
initial sales charges may find the initial sales charge alternative
particularly attractive because similar sales charge reductions are not
available with respect to the CDSCs imposed in connection with purchases of
Class B or Class C shares. Investors not qualifying for reduced initial sales
charges who expect to maintain their investment for an extended period of time
also may elect to purchase Class A or Class D shares, because over time the
accumulated ongoing account maintenance and distribution fees on Class B or
Class C shares may exceed the initial sales charge and, in the case of Class D
shares, the account maintenance fee. Although some investors that previously
purchased Class A shares may no longer be eligible to purchase Class A shares
of other MLAM-advised mutual funds, those previously purchased Class A shares,
together with Class B, Class C and Class D share holdings, will count toward a
right of accumulation which may qualify the investor for reduced initial sales
charges on new initial sales charge purchases. In addition, the ongoing Class B
and Class C account maintenance and distribution fees will cause Class B and
Class C shares to have higher expense ratios, pay lower dividends and have
lower total returns than the initial sales charge shares. The ongoing Class D
account maintenance fees will cause Class D shares to have a higher expense
ratio, pay lower dividends and have a lower total return than Class A shares.
    
  Deferred Sales Charge Alternatives. Because no initial sales charges are
deducted at the time of purchase, Class B and Class C shares provide the
benefit of putting all of the investor's dollars to work from the time the
investment is made. The deferred sales charge alternatives may be particularly
appealing to investors who do not qualify for a reduction in initial sales
charges. Both Class B and Class C shares are subject to ongoing account
maintenance fees and distribution fees; however, the ongoing account
maintenance and distribution fees potentially may be offset to the extent any
return is realized on the additional funds initially invested in Class B or
Class C shares. In addition, Class B shares will be converted into Class D
shares of the Fund after a conversion period of approximately ten years, and
thereafter investors will be subject to lower ongoing fees.
 
  Certain investors may elect to purchase Class B shares if they determine it
to be most advantageous to have all their funds invested initially and intend
to hold their shares for an extended period of time. Investors in Class B
shares should take into account whether they intend to redeem their shares
within the CDSC period and, if not, whether they intend to remain invested
until the end of the conversion period and thereby take advantage of the
reduction in ongoing fees resulting from the conversion into Class D shares.
Other investors, however, may elect to purchase Class C shares if they
determine that it is advantageous to have all their assets invested initially
and they are uncertain as to the length of time they intend to hold their
assets in MLAM-advised mutual funds. Although Class C shareholders are subject
to a shorter CDSC period at a lower rate, they are subject to higher
distribution fees and forgo the Class B conversion feature, making their
investment subject to account maintenance and distribution fees for an
indefinite period of time. In addition, while both Class B and Class C
distribution fees are subject to the limitations on asset-based sales charges
imposed by the NASD, the Class B distribution fees are further limited under a
voluntary waiver of asset-based sales charges. See "Purchase of Shares--
Limitations on the Payment of Deferred Sales Charges".
 
                                       7
<PAGE>
 
                              FINANCIAL HIGHLIGHTS
   
  The financial information in the table below has been audited in conjunction
with the annual audits of the financial statements of the Fund by Deloitte &
Touche LLP, independent auditors. Financial statements for the year ended July
31, 1996 and the independent auditors' report thereon are included in the
Statement of Additional Information. The following per share data and ratios
have been derived from information provided in the Fund's audited financial
statements. Further information about the performance of the Fund is contained
in the Fund's most recent annual report to shareholders which may be obtained,
without charge, by calling or by writing the Trust at the telephone number or
address on the front cover of this Prospectus.     
 
<TABLE>   
<CAPTION>
                                                     CLASS A
                                      ------------------------------------------
                                                                        FOR THE
                                                                        PERIOD
                                              FOR THE YEAR             MARCH 27,
                                             ENDED JULY 31,            1992+  TO
                                      -------------------------------  JULY 31,
                                       1996    1995    1994    1993      1992
                                      ------  ------  ------  -------  ---------
 <S>                                  <C>     <C>     <C>     <C>      <C>
 Increase (Decrease) in Net Asset
  Value:
 PER SHARE OPERATING PERFORMANCE:
 Net asset value, beginning of
  period...........................   $10.31  $10.33  $10.83  $ 10.58   $10.00
                                      ------  ------  ------  -------   ------
 Investment income--net............      .54     .55     .55      .58      .20
 Realized and unrealized gain
  (loss) on investments--net.......     (.03)   (.02)   (.35)     .30      .58
                                      ------  ------  ------  -------   ------
 Total from investment operations..      .51     .53     .20      .88      .78
                                      ------  ------  ------  -------   ------
 Less dividends and distributions:
 Investment income--net............     (.54)   (.55)   (.55)    (.58)    (.20)
 Realized gain on investments--net.      --      --      --      (.05)     --
 In excess of realized gain on
  investments--net.................      --      --     (.15)     --       --
                                      ------  ------  ------  -------   ------
 Total dividends and distributions.     (.54)   (.55)   (.70)    (.63)    (.20)
                                      ------  ------  ------  -------   ------
 Net asset value, end of period....   $10.28  $10.31  $10.33  $ 10.83   $10.58
                                      ======  ======  ======  =======   ======
 TOTAL INVESTMENT RETURNS:**
 Based on net asset value per
  share............................     4.98%   5.44%   1.87%    8.71%    7.88%#
                                      ======  ======  ======  =======   ======
 RATIOS TO AVERAGE NET ASSETS:
 Expenses, net of reimbursement....      .84%    .75%    .69%     .45%     .12%*
                                      ======  ======  ======  =======   ======
 Expenses..........................      .95%    .92%   1.03%    1.04%    1.18%*
                                      ======  ======  ======  =======   ======
 Investment income--net............     5.16%   5.51%   5.18%    5.56%    5.73%*
                                      ======  ======  ======  =======   ======
 SUPPLEMENTAL DATA:
 Net assets, end of period (in
  thousands).......................   $5,884  $6,936  $8,810  $12,859   $9,493
                                      ======  ======  ======  =======   ======
 Portfolio Turnover................    53.99%  22.36%  58.67%   23.83%   30.39%
                                      ======  ======  ======  =======   ======
</TABLE>    
- --------
 + Commencement of Operations.
 * Annualized
** Total investment returns exclude the effects of sales loads.
# Aggregate total investment return.
 
                                       8
<PAGE>
 
<TABLE>   
<CAPTION>
                                            CLASS B                             CLASS C              CLASS D
                           ---------------------------------------------  -------------------- --------------------
                          
                          
                          
                                                                FOR THE              FOR THE              FOR THE
                                                                PERIOD    FOR THE    PERIOD    FOR THE    PERIOD
                                    FOR THE YEAR               MARCH 27,    YEAR   OCTOBER 21,   YEAR   OCTOBER 21,
                                   ENDED JULY 31,              1992+  TO   ENDED    1994+ TO    ENDED    1994+ TO
                           ----------------------------------   JULY 31,   JULY 31,  JULY 31,   JULY 31,  JULY 31,
                            1996     1995     1994     1993      1992       1996      1995       1996      1995
                           -------  -------  -------  -------  ---------  -------- ----------- -------- -----------
 <S>                       <C>      <C>      <C>      <C>      <C>        <C>      <C>         <C>      <C>
 Increase (Decrease) in
  Net Asset Value:
 PER SHARE OPERATING
  PERFORMANCE:
 Net asset value,
  beginning of period....  $ 10.31  $ 10.33  $ 10.83  $ 10.58   $ 10.00    $10.31    $ 9.99     $10.31    $ 9.99
                           -------  -------  -------  -------   -------    ------    ------     ------    ------
 Investment income--net..      .48      .50      .50      .53       .18       .47       .37        .53       .41
 Realized and unrealized
  gain (loss) on
  investments--net.......     (.03)    (.02)    (.35)     .30       .58      (.03)      .32       (.03)      .32
                           -------  -------  -------  -------   -------    ------    ------     ------    ------
 Total from investment
  operations.............      .45      .48      .15      .83       .76       .44       .69        .50       .73
                           -------  -------  -------  -------   -------    ------    ------     ------    ------
 Less dividends and
  distributions:
 Investment income--net..     (.48)    (.50)    (.50)    (.53)     (.18)     (.47)     (.37)      (.53)     (.41)
 Realized gain on
  investments--net.......      --       --       --      (.05)      --        --        --         --        --
 In excess of realized
  gain on investments--
  net....................      --       --      (.15)     --        --        --        --         --        --
                           -------  -------  -------  -------   -------    ------    ------     ------    ------
 Total dividends and
  distributions..........     (.48)    (.50)    (.65)    (.58)     (.18)     (.47)     (.37)      (.53)     (.41)
                           -------  -------  -------  -------   -------    ------    ------     ------    ------
 Net asset value, end of
  period.................  $ 10.28  $ 10.31  $ 10.33  $ 10.83   $ 10.58    $10.28    $10.31     $10.28    $10.31
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
 TOTAL INVESTMENT
  RETURNS:**
 Based on net asset value
  per share..............     4.44%    4.91%    1.35%    8.16%     7.69%#    4.33%     7.13%#     4.88%     7.57%#
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
 RATIOS TO AVERAGE NET
  ASSETS:
 Expenses, net of
  reimbursement..........     1.35%    1.27%    1.21%     .96%      .62%*    1.48%     1.46%*      .94%      .92%*
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
 Expenses................     1.46%    1.44%    1.54%    1.55%     1.70%*    1.57%     1.61%*     1.05%     1.07%*
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
 Investment income--net..     4.64%    5.00%    4.70%    5.03%     5.13%*    4.50%     4.70%*     5.05%     5.27%*
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
 SUPPLEMENTAL DATA:
 Net assets, end of
  period (in thousands)..  $48,696  $52,023  $56,960  $54,921   $32,686    $1,219    $  375     $  684    $  796
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
 Portfolio Turnover......    53.99%   22.36%   58.67%   23.83%    30.39%    53.99%    22.36%     53.99%    22.36%
                           =======  =======  =======  =======   =======    ======    ======     ======    ======
</TABLE>    
- --------
 + Commencement of Operations.
 * Annualized
** Total investment returns exclude the effects of sales loads.
# Aggregate total investment return.
 
                                       9
<PAGE>
 
                       INVESTMENT OBJECTIVE AND POLICIES
   
  The investment objective of the Fund is to provide shareholders with as high
a level of income exempt from Federal and Minnesota personal income taxes as is
consistent with prudent investment management. The Fund seeks to achieve its
objective by investing primarily in a non-diversified portfolio of long-term
obligations issued by or on behalf of the State of Minnesota, its political or
governmental subdivisions, municipalities, governmental agencies or
instrumentalities, or by Indian tribal governments of tribes located in
Minnesota, which pay interest exempt from Federal and Minnesota personal income
taxes ("Minnesota Municipal Bonds"). Obligations exempt from Federal income
taxes generally are referred to herein as "Municipal Bonds." Unless otherwise
indicated, references to Municipal Bonds shall be deemed to include Minnesota
Municipal Bonds. The Fund at all times, except during temporary defensive
periods, will maintain at least 65% of its total assets invested in Minnesota
Municipal Bonds. The investment objective of the Fund as set forth in the first
sentence of this paragraph is a fundamental policy and may not be changed
without shareholder approval. At times, the Fund may seek to hedge its
portfolio through the use of futures transactions to reduce volatility in the
net asset value of Fund shares.     
   
  Municipal Bonds may include several types of bonds. The Fund also may invest
in variable rate demand obligations ("VRDOs") and participations therein,
described below, and short-term tax-exempt municipal obligations such as tax
anticipation notes. The interest on Municipal Bonds may be payable either at a
fixed rate or at a variable or floating rate. At least 80% of the Municipal
Bonds purchased by the Fund primarily will be what are commonly referred to as
"investment grade" securities, which are obligations rated at the time of
purchase within the four highest quality ratings as determined by either
Moody's Investors Service, Inc. ("Moody's") (currently Aaa, Aa, A and Baa),
Standard & Poor's Ratings Group ("Standard & Poor's") (currently AAA, AA, A and
BBB) or Fitch Investors Service, Inc. ("Fitch") (currently AAA, AA, A and BBB).
If Municipal Bonds are unrated, such securities will possess creditworthiness
comparable, in the opinion of the manager of the Fund, Fund Asset Management,
L.P. (the "Manager"), to obligations in which the Fund may invest. Municipal
Bonds rated in the fourth highest rating category, while considered "investment
grade", have certain speculative characteristics and are more likely to be
downgraded to non-investment grade than obligations rated in one of the top
three rating categories. See Appendix II--"Ratings of Municipal Bonds" in the
Statement of Additional Information for more information regarding ratings of
debt securities. An issue of rated Municipal Bonds may cease to be rated or its
rating may be reduced below "investment grade" subsequent to its purchase by
the Fund. If an obligation is downgraded below investment grade, the Manager
will consider factors such as price, credit risk, market conditions, financial
condition of the issuer and interest rates to determine whether to continue to
hold the obligation in the Fund's portfolio.     
   
  The Fund may invest up to 20% of its total assets in Municipal Bonds that are
rated below Baa by Moody's or below BBB by Standard & Poor's or Fitch or which,
in the Manager's judgment, possess similar credit characteristics. Such
securities, sometimes referred to as "high yield" or "junk" bonds, are
predominantly speculative with respect to the capacity to pay interest and
repay principal in accordance with the terms of the security and generally
involve a greater volatility of price than securities in higher rating
categories. The market prices of high yielding, lower-rated securities may
fluctuate more than higher-rated securities and may decline significantly in
periods of general economic difficulty, which may follow periods of rising
interest rates. In purchasing such securities, the Fund will rely on the
Manager's judgment, analysis     
 
                                       10
<PAGE>
 
   
and experience in evaluating the creditworthiness of the issuer of such
securities. The Manager will take into consideration, among other things, the
issuer's financial resources, its sensitivity to economic conditions and
trends, its operating history, the quality of its management and regulatory
matters. See "Investment Objective and Policies" in the Statement of Additional
Information for a more detailed discussion of the pertinent risk factors
involved in investing in "high yield" or "junk" bonds and Appendix II--"Ratings
of Municipal Bonds" in the Statement of Additional Information for additional
information regarding ratings of debt securities. The Fund does not intend to
purchase debt securities that are in default or which the Manager believes will
be in default.     
 
  Certain Municipal Bonds may be entitled to the benefits of letters of credit
or similar credit enhancements issued by financial institutions. In such
instances, the Trustees and the Manager will take into account in assessing the
quality of such bonds not only the creditworthiness of the issuer of such bonds
but also the creditworthiness of the financial institution.
 
  The Fund's investments may also include VRDOs and VRDOs in the form of
participation interests ("Participating VRDOs") in variable rate tax-exempt
obligations held by a financial institution. The VRDOs in which the Fund will
invest are tax-exempt obligations which contain a floating or variable interest
rate adjustment formula and an unconditional right of demand on the part of the
holder thereof to receive payment of the unpaid principal balance plus accrued
interest on a short notice period not to exceed seven days. Participating VRDOs
provide the Fund with a specified undivided interest (up to 100%) of the
underlying obligation and the right to demand payment of the unpaid principal
balance plus accrued interest on the Participating VRDOs from the financial
institution on a specified number of days' notice, not to exceed seven days.
There is, however, the possibility that because of default or insolvency the
demand feature of VRDOs or Participating VRDOs may not be honored. The Fund has
been advised by its counsel that the Fund should be entitled to treat the
income received on Participating VRDOs as interest from tax-exempt obligations.
 
  VRDOs that contain an unconditional right of demand to receive payment of the
unpaid principal balance plus accrued interest on a notice period exceeding
seven days may be deemed illiquid securities. A VRDO with a demand notice
period exceeding seven days will therefore be subject to the Fund's restriction
on illiquid investments unless, in the judgment of the Trustees, such VRDO is
liquid. The Trustees may adopt guidelines and delegate to the Manager the daily
function of determining and monitoring liquidity of such VRDOs. The Trustees,
however, will retain sufficient oversight and be ultimately responsible for
such determinations.
 
  The Fund ordinarily does not intend to realize investment income not exempt
from Federal and Minnesota personal income taxes. However, to the extent that
suitable Minnesota Municipal Bonds are not available for investment by the
Fund, the Fund may purchase Municipal Bonds issued by other states, their
agencies and instrumentalities, the interest income on which is exempt, in the
opinion of bond counsel, from Federal, but not Minnesota, taxation. In
addition, the Fund may invest in obligations of other qualifying issuers, such
as issuers located in Puerto Rico, the Virgin Islands and Guam, which are
exempt both from Federal and Minnesota taxation. The Fund also may invest in
securities not issued by or on behalf of a state or territory or by an agency
or instrumentality thereof, if the Fund nevertheless believes such securities
to be exempt from Federal income taxation ("Non-Municipal Tax-Exempt
Securities"). Non-Municipal Tax-Exempt Securities may include securities issued
by other investment companies that invest in municipal
 
                                       11
<PAGE>
 
bonds, to the extent such investments are permitted by the Investment Company
Act of 1940, as amended (the "1940 Act"). Other Non-Municipal Tax-Exempt
Securities could include trust certificates or other derivative instruments
evidencing interests in one or more Municipal Bonds.
   
  Under normal circumstances, except when acceptable securities are unavailable
as determined by the Manager, the Fund will invest at least 65% of its assets
in Minnesota Municipal Bonds. However, since at least 95% of the Fund's exempt-
interest dividends must be derived from interest income on obligations of the
State of Minnesota, its political or governmental subdivisions, municipalities,
governmental agencies or instrumentalities, or of Indian tribal governments of
tribes located in Minnesota, in order for such interest income to be excluded
from the Minnesota taxable net income of individuals, estates and trusts, it is
anticipated that substantially all of the Fund's assets will be invested in
Minnesota Municipal Bonds. Dividends from interest on other qualifying issues
would not satisfy the 95% test. If for any reason there is not an adequate
supply of Minnesota Municipal Bonds, the Fund may have to hold cash uninvested
in order to preserve the Minnesota tax status of its dividends. Cash held
uninvested will not earn income. For temporary defensive periods or to provide
liquidity, the Fund has the authority to invest as much as 35% of its total
assets in tax-exempt or taxable money market obligations with a maturity of one
year or less (such short-term obligations being referred to herein as
"Temporary Investments"), except that taxable Temporary Investments shall not
exceed 20% of the Fund's net assets. The Temporary Investments, VRDOs and
Participating VRDOs in which the Fund may invest also will be in the following
rating categories at the time of purchase: MIG-1/VMIG-1 through MIG-4/VMIG-4
for notes and VRDOs and Prime-1 through Prime-3 for commercial paper (as
determined by Moody's), SP-1 through SP-2 for notes and A-1 through A-3 for
VRDOs and commercial paper (as determined by Standard & Poor's), or F-1 through
F-3 for notes, VRDOs and commercial paper (as determined by Fitch) or, if
unrated, of comparable quality in the opinion of the Manager. The Fund at all
times will have at least 80% of its net assets invested in securities the
interest on which is exempt from Federal taxation. However, interest received
on certain otherwise tax-exempt securities which are classified as "private
activity bonds" (in general, bonds that benefit non-governmental entities) may
be subject to Federal and Minnesota alternative minimum tax. The percentage of
the Fund's net assets invested in "private activity bonds" will vary during the
year. See "Distributions and Taxes". In addition, the Fund reserves the right
to invest temporarily a greater portion of its assets in Temporary Investments
for defensive purposes, when, in the judgment of the Manager, market conditions
warrant. The investment objective of the Fund is a fundamental policy of the
Fund which may not be changed without a vote of a majority of the outstanding
shares of the Fund. The Fund's hedging strategies, which are described in more
detail under "Financial Futures Transactions and Options", are not fundamental
policies and may be modified by the Trustees of the Trust without the approval
of the Fund's shareholders.     
 
POTENTIAL BENEFITS
 
  Investment in shares of the Fund offers several benefits. The Fund offers
investors the opportunity to receive income exempt from Federal and Minnesota
personal income taxes by investing in a professionally managed portfolio
consisting primarily of long-term Minnesota Municipal Bonds. The Fund also
provides liquidity because of its redemption features and relieves the investor
of the burdensome administrative details involved in managing a portfolio of
tax-exempt securities. The benefits of investing in the Fund are at least
partially offset by the expenses involved in operating an investment company.
Such expenses primarily consist of the management fee and operational costs
and, in the case of certain classes of shares, the account maintenance and
distribution costs.
 
                                       12
<PAGE>
 
SPECIAL AND RISK CONSIDERATIONS RELATING TO MUNICIPAL BONDS
 
  The risks and special considerations involved in investments in Municipal
Bonds vary with the types of instruments being acquired. Investments in Non-
Municipal Tax-Exempt Securities may present similar risks, depending on the
particular product. Certain instruments in which the Fund may invest may be
characterized as derivative instruments. See "Description of Municipal Bonds"
and "Financial Futures Transactions and Options".
   
  Moreover, the Fund ordinarily will invest at least 65% (and, it is
anticipated, substantially more) of its total assets in Minnesota Municipal
Bonds, and therefore it is more susceptible to factors adversely affecting
issuers of Minnesota Municipal Bonds than is a municipal bond mutual fund that
is not concentrated in issuers of Minnesota Municipal Bonds to this degree. The
Minnesota Department of Finance has projected that the State will complete its
current biennium June 30, 1997 with a $1 million surplus, plus a $350 million
cash flow account balance, plus a $270 million budget reserve. Total General
Fund expenditures and transfers for the biennium are projected to be $18.9
billion. Planning estimates for the biennium ending June 30, 1999 indicate the
possible need for additional revenue increases or spending cuts relative to
current law. State expenditures for education finance (K-12) and corrections in
the biennium ending June 30, 1999 are not anticipated to be sufficient to
maintain current program levels. State grants and aids represent a large
percentage of the total revenues of cities, towns, counties and school
districts in Minnesota. Possible reductions in federal aid to the State and its
political subdivisions, economic or other fiscal difficulties in the State,
possible future changes in Federal and State income tax laws, including rate
reductions, and recent Minnesota tax legislation (see "Distributions and
Taxes--Taxes") could adversely affect the value and marketability of Minnesota
Municipal Bonds that are held by the Fund. The Manager does not believe,
however, that the current economic conditions in Minnesota will have a
significant adverse affect on the Fund's ability to invest in high quality
Minnesota Municipal Bonds. See Appendix I--"Economic Conditions in Minnesota"
in the Statement of Additional Information.     
 
DESCRIPTION OF MUNICIPAL BONDS
   
  Municipal Bonds include debt obligations issued to obtain funds for various
public purposes, including construction and equipping of a wide range of public
facilities (including water, sewer, gas, electricity, solid waste, health care,
transportation, education and housing facilities), financing various
governmental programs, including mortgage financing for owner-occupied
residences, refunding outstanding obligations and obtaining funds for general
operating expenses and loans to other public institutions. In addition, certain
types of bonds are issued by or on behalf of public authorities to finance or
refinance various privately operated facilities, including manufacturing
facilities, hospitals, nursing homes, multi-family residential rental projects
and certain other specialized facilities. For purposes of this Prospectus, such
obligations are referred to as Municipal Bonds if the interest paid thereon is
excluded from gross income for purposes of Federal income taxation and as
Minnesota Municipal Bonds if the obligations are issued by or on behalf of the
State of Minnesota, its political or governmental subdivisions, municipalities,
governmental agencies or instrumentalities, or by Indian tribal governments of
tribes located in Minnesota, and if the interest thereon is excluded from gross
income for Federal income tax purposes and from taxable net income of
individuals, estates and trusts for Minnesota income tax purposes, even though
such bonds may be "private activity bonds" as discussed below.     
 
                                       13
<PAGE>
 
   
  The two principal classifications of Municipal Bonds are "general obligation"
and "revenue" bonds which include industrial development bonds ("IDBs") and,
for bonds issued after August 15, 1986, private activity bonds. General
obligation bonds are secured by the issuer's pledge of its full faith, credit
and general taxing power to the payment of principal and interest. The taxing
power of any governmental entity may be limited, however, by provisions of its
state constitution or laws. An issuer's creditworthiness and its capacity to
make timely payment of interest and principal on a general obligation bond when
due will depend on many factors, including potential erosion of its property
tax base due to population declines, economic conditions which may depress
property values, natural disasters, declines in its industrial or commercial
base or inability to attract new industries or businesses, economic limits on
the ability to tax without eroding the tax base, legislation or voter
initiatives to limit ad valorem real property taxes or the value or
classification of property for property tax purposes, and the extent to which
the issuer relies on Federal or state aid, access to capital markets or other
factors beyond the issuer's control.     
   
  Revenue bonds are payable solely from the revenues derived from a particular
facility or class of facilities or, in some cases, from the proceeds of a
special excise tax or other specific revenue source such as payments from the
user of the facility being financed; accordingly, the timely payment of
interest and the repayment of principal in accordance with the terms of a
revenue bond is a function of the economic viability of such facility or such
revenue source. The Fund will not invest in revenue bonds where the entity
supplying the revenues from which the issuer is paid, including predecessors,
has a record of less than three years of continuous business operations if such
investments, together with investments involving other unseasoned entities,
would exceed 5% of the Fund's total assets. Investments involving entities with
less than three years of continuous business operations may pose somewhat
greater risks due to the lack of a substantial operating history for such
entities. The Manager believes, however, that the potential benefits of such
investments outweigh the potential risks, particularly given the Fund's
limitations on such investments.     
   
  The Fund may purchase IDBs and private activity bonds. IDBs and private
activity bonds are, in most cases, tax-exempt securities issued by states,
municipalities or public authorities to provide funds, usually through a loan
or lease arrangement, for the purpose of financing construction or improvement
of a facility to be used by a private entity. Such bonds are secured primarily
by revenues derived from loan repayments or lease payments due from the entity
which may or may not be guaranteed by an affiliated company or otherwise
secured. IDBs and private activity bonds are generally not secured by a pledge
of the taxing power of the issuer of such bonds. Therefore, an investor should
be aware that repayment of such bonds generally depends on revenues
attributable to a private entity and should be aware of the risks that such an
investment may entail. Continued ability of an entity to generate sufficient
revenues for the payment of principal and interest on such bonds will be
affected by many factors including the size of the entity, its capital
structure, demand for its products or services, competition, general economic
conditions, government regulation and the entity's dependence on revenues from
the operation of the particular facility being financed. The Fund also may
invest in so-called "moral obligation" bonds, which are normally issued by
special purpose authorities. If an issuer of moral obligation bonds is unable
to meet its obligations, repayment of such bonds becomes a moral commitment,
but not a legal obligation, of the state or municipality in question.     
 
  The Fund may invest in Municipal Bonds (and Non-Municipal Tax-Exempt
Securities) the return on which is based on a particular index of value or
interest rates. For example, the Fund may invest in Municipal Bonds that pay
interest based on an index of Municipal Bond interest rates or based on the
value of gold or
 
                                       14
<PAGE>
 
   
some other commodity. The principal amount payable upon maturity of certain
Municipal Bonds also may be based on the value of an index. To the extent the
Fund invests in these types of Municipal Bonds, the Fund's return on such
Municipal Bonds will be subject to risk with respect to the value of the
particular index. Interest and principal payable on the Municipal Bonds may
also be based on relative changes among particular indices. Also, the Fund may
invest in so-called "inverse floating obligations" or "residual interest bonds"
on which the interest rates typically decline as market rates increase and
increase as market rates decline. The Fund's return on such types of Municipal
Bonds (and Non-Municipal Tax-Exempt Securities) will be subject to risk with
respect to the value of the particular index, which may include reduced or
eliminated interest payments and losses of invested principal. Such securities
have the effect of providing a degree of investment leverage, since they may
increase or decrease in value in response to changes, as an illustration, in
market interest rates at a rate which is a multiple (typically two) of the rate
at which fixed-rate long-term tax-exempt securities increase or decrease in
response to such changes. As a result, the market values of such securities
will generally be more volatile than the market values of fixed-rate tax-exempt
securities. To seek to limit the volatility of these securities, the Fund may
purchase inverse floating obligations with shorter-term maturities or which
contain limitations on the extent to which the interest rate may vary. Certain
investments in such obligations may be illiquid. The Fund may not invest in
such illiquid obligations if such investments, together with other illiquid
investments, would exceed 15% of the Fund's total assets. The Manager believes,
however, that indexed and inverse floating obligations represent flexible
portfolio management instruments for the Fund which allow the Fund to seek
potential investment rewards, hedge other portfolio positions or vary the
degree of investment leverage relatively efficiently under different market
conditions.     
   
  Also included within the general category of Municipal Bonds are
participation certificates that represent participations in a lease, an
installment purchase contract or a conditional sales contract (hereinafter
collectively called "lease obligations") entered into by a governmental entity
or authority to finance the acquisition or construction of land, buildings,
equipment or other facilities. Although lease obligations do not constitute
general obligations of the issuer for which the issuer's unlimited taxing power
is pledged, a lease obligation is frequently backed by the issuer's covenant to
budget for, appropriate and make the payments due under the lease obligation.
However, certain lease obligations contain "non-appropriation" clauses which
provide that the issuer has no obligation to make lease or installment purchase
payments in future years unless money is appropriated for such purpose on a
yearly basis. Although "non-appropriation" lease obligations are secured by the
leased property, disposition of the property in the event of repossession might
prove difficult. These securities represent a type of financing that has not
yet developed the depth of marketability associated with more conventional
securities. Certain investments in lease obligations may be illiquid. The Fund
may not invest in illiquid lease obligations if such investments, together with
all other illiquid investments, would exceed 15% of the Fund's total net
assets. The Fund may, however, invest without regard to such limitation in
lease obligations which the Manager, pursuant to guidelines which have been
adopted by the Board of Trustees and subject to the supervision of the Board,
determines to be liquid. The Manager will deem lease obligations liquid if they
are publicly offered and have received an investment grade rating of Baa or
better by Moody's, or BBB or better by Standard & Poor's or Fitch. Unrated
lease obligations, or those rated below investment grade, will be considered
liquid if the obligations come to the market through an underwritten public
offering and at least two dealers are willing to give competitive bids. In
reference to obligations rated below investment grade, the Manager must, among
other things, also review the creditworthiness of the governmental entity that
is obligated to make payment under the lease obligation     
 
                                       15
<PAGE>
 
and make certain specified determinations based on such factors as the
existence of a rating or credit enhancement such as insurance, the frequency of
trades or quotes for the obligations and the willingness of dealers to make a
market in the obligation.
   
  Federal tax legislation has limited the types and volume of bonds the
interest on which qualifies for a Federal income tax exemption. The State of
Minnesota also has enacted legislation that could limit the types of bonds
eligible for a Minnesota income tax exemption. See "Distributions and Taxes--
Taxes". As a result, this legislation and legislation which may be enacted in
the future may affect the availability of Municipal Bonds for investment by the
Fund.     
 
WHEN-ISSUED SECURITIES AND DELAYED DELIVERY TRANSACTIONS
   
  The Fund may purchase or sell Municipal Bonds on a delayed delivery basis or
a when-issued basis at fixed purchase terms. These transactions arise when
securities are purchased or sold by the Fund with payment and delivery taking
place in the future. The purchase will be recorded on the date the Fund enters
into the commitment, and the value of the obligation will thereafter be
reflected in the calculation of the Fund's net asset value. The value of the
obligation on the delivery date may be more or less than its purchase price. A
separate account of the Fund will be established with its custodian consisting
of cash, cash equivalents or liquid securities having a market value at all
times at least equal to the amount of the forward commitment.     
 
CALL RIGHTS
   
  The Fund may purchase a Municipal Bond issuer's right to call all or a
portion of such Municipal Bond for mandatory tender for purchase (a "Call
Right"). A holder of a Call Right may exercise such right to require a
mandatory tender for the purchase of related Municipal Bonds, subject to
certain conditions. A Call Right that is not exercised prior to the maturity of
the related Municipal Bond will expire without value. The economic effect of
holding both the Call Right and the related Municipal Bond is identical to that
of holding a Municipal Bond as a non-callable security. Certain investments in
such obligations may be illiquid. The Fund may not invest in such illiquid
obligations if such investments, together with other illiquid investments,
would exceed 15% of the Fund's total assets.     
 
FINANCIAL FUTURES TRANSACTIONS AND OPTIONS
 
  The Fund is authorized to purchase and sell certain exchange traded financial
futures contracts ("financial futures contracts") solely for the purpose of
hedging its investments in Municipal Bonds against declines in value and to
hedge against increases in the cost of securities it intends to purchase.
However, any transactions involving financial futures or options (including
puts and calls associated therewith) will be in accordance with the Fund's
investment policies and limitations. A financial futures contract obligates the
seller of a contract to deliver and the purchaser of a contract to take
delivery of the type of financial instrument covered by the contract or in the
case of an index-based futures contract, to make and accept a cash settlement,
at a specific future time for a specified price. A sale of financial futures
contracts may provide a hedge against a decline in the value of portfolio
securities because such depreciation may be offset, in whole or in part, by an
increase in the value of the position in the financial futures contracts. A
purchase of financial futures contracts may provide a hedge against an increase
in the cost of securities intended to be purchased because such appreciation
may be offset, in whole or in part, by an increase in the value of the position
in the
 
                                       16
<PAGE>
 
futures contracts. Distributions, if any, of net long-term capital gains from
certain transactions in futures or options are taxable at long-term capital
gains rates for Federal income tax purposes, regardless of the length of time
the shareholder has owned Fund shares. See "Distributions and Taxes--Taxes".
 
  The Fund may deal in financial futures contracts traded on the Chicago Board
of Trade based on The Bond Buyer Municipal Bond Index, a price-weighted measure
of the market value of 40 large, recently issued tax-exempt bonds. There can be
no assurance, however, that a liquid secondary market will exist to terminate
any particular financial futures contract at any specific time. If it is not
possible to close a financial futures position entered into by the Fund, the
Fund would continue to be required to make daily cash payments of variation
margin in the event of adverse price movements. In such a situation, if the
Fund has insufficient cash, it may have to sell portfolio securities to meet
daily variation margin requirements at a time when it may be disadvantageous to
do so. The inability to close financial futures positions also could have an
adverse impact on the Fund's ability to hedge effectively. There is also the
risk of loss by the Fund of margin deposits in the event of bankruptcy of a
broker with whom the Fund has an open position in a financial futures contract.
 
  The Fund may purchase and sell financial futures contracts on U.S. Government
securities and write and purchase put and call options on such futures
contracts as a hedge against adverse changes in interest rates as described
more fully in the Statement of Additional Information. With respect to U.S.
Government securities, currently there are financial futures contracts based on
long-term U.S. Treasury bonds, Treasury notes, Government National Mortgage
Association ("GNMA") Certificates and three-month U.S. Treasury bills.
 
  Subject to policies adopted by the Trustees, the Fund also may engage in
other financial futures contracts transactions and options thereon, such as
financial futures contracts or options on other municipal bond indexes which
may become available if the Manager of the Fund and the Trustees of the Trust
should determine that there is normally a sufficient correlation between the
prices of such futures contracts and the Municipal Bonds in which the Fund
invests to make such hedging appropriate.
 
  Utilization of futures transactions and options thereon involves the risk of
imperfect correlation in movements in the price of futures contracts and
movements in the price of the security which is the subject of the hedge. If
the price of the futures contract moves more or less than the price of the
security that is the subject of the hedge, the Fund will experience a gain or
loss which will not be completely offset by movements in the price of such
security. There is a risk of imperfect correlation where the securities
underlying futures contracts have different maturities, ratings or geographic
mixes than the security being hedged. In addition, the correlation may be
affected by additions to or deletions from the index which serves as a basis
for a financial futures contract. Finally, in the case of futures contracts on
U.S. Government securities and options on such futures contracts, the
anticipated correlation of price movements between the U.S. Government
securities underlying the futures or options and Municipal Bonds may be
adversely affected by economic, political, legislative or other developments
which have a disparate impact on the respective markets for such securities.
 
  Under regulations of the Commodity Futures Trading Commission ("CFTC"), the
futures trading activities described herein will not result in the Fund being
deemed to be a "commodity pool", as defined under such regulations, provided
that the Fund adheres to certain restrictions. In particular, the Fund may
 
                                       17
<PAGE>
 
   
purchase and sell futures contracts and options thereon (i) for bona fide
hedging purposes, and (ii) for non-hedging purposes, if the aggregate initial
margins and premiums required to establish positions in such contracts and
options does not exceed 5% of the liquidation value of the Fund's portfolio
assets after taking into account unrealized profits and unrealized losses on
any such contracts and options. (However, as stated above, the Fund intends to
engage in options and futures transactions only for hedging purposes.) Margin
deposits may consist of cash or securities acceptable to the broker and the
relevant contract market.     
   
  When the Fund purchases a futures contract or writes a put option or
purchases a call option thereon, it will maintain an amount of cash, cash
equivalents (e.g., high grade commercial paper and daily tender adjustable
notes) or liquid securities in a segregated account with the Fund's custodian
so that the amount so segregated plus the amount of initial and variation
margin held in the account of its broker equals the market value of the futures
contracts, thereby ensuring that the use of such futures contract is
unleveraged. It is not anticipated that transactions in futures contracts will
have the effect of increasing portfolio turnover.     
 
  Although certain risks are involved in options and futures transactions, the
Manager believes that, because the Fund will engage in futures transactions
only for hedging purposes, the futures portfolio strategies of the Fund will
not subject the Fund to certain risks frequently associated with speculation in
futures transactions. The Fund must meet certain Federal income tax
requirements under the Internal Revenue Code of 1986, as amended (the "Code"),
in order to qualify for the special tax treatment afforded regulated investment
companies, including a requirement that less than 30% of its gross income be
derived from the sale or other disposition of securities held for less than
three months. Additionally, the Fund is required to meet certain
diversification requirements under the Code.
 
  The liquidity of a secondary market in a futures contract may be adversely
affected by "daily price fluctuation limits" established by commodity exchanges
which limit the amount of fluctuation in a futures contract price during a
single trading day. Once the daily limit has been reached in the contract, no
trades may be entered into at a price beyond the limit, thus preventing the
liquidation of open futures positions. Prices have in the past moved beyond the
daily limit on a number of consecutive trading days.
 
  The successful use of transactions in futures also depends on the ability of
the Manager to forecast correctly the direction and extent of interest rate
movements within a given time frame. To the extent these rates remain stable
during the period in which a futures contract is held by the Fund or moves in a
direction opposite to that anticipated, the Fund may realize a loss on the
hedging transaction which is not fully or partially offset by an increase in
the value of portfolio securities. As a result, the Fund's total return for
such period may be less than if it had not engaged in the hedging transaction.
Furthermore, the Fund will only engage in hedging transactions from time to
time and may not necessarily be engaging in hedging transactions when movements
in interest rates occur.
 
  Reference is made to the Statement of Additional Information for further
information on financial futures contracts and certain options thereon.
 
REPURCHASE AGREEMENTS
 
  As Temporary Investments, the Fund may invest in securities pursuant to
repurchase agreements. Repurchase agreements may be entered into only with a
member bank of the Federal Reserve System or a
 
                                       18
<PAGE>
 
   
primary dealer in U.S. Government securities or an affiliate thereof. Under
such agreements, the seller agrees, upon entering into the contract, to
repurchase the security from the Fund at a mutually agreed upon time and price,
thereby determining the yield during the term of the agreement. This results in
a fixed rate of return insulated from market fluctuations during such period.
The Fund may not invest in repurchase agreements maturing in more than seven
days if such investments, together with the Fund's other illiquid investments,
would exceed 15% of the Fund's total assets. In the event of default by the
seller under a repurchase agreement, the Fund may suffer time delays and incur
costs or possible losses in connection with the disposition of the underlying
securities.     
 
INVESTMENT RESTRICTIONS
   
  The Fund's investment activities are subject to further restrictions that are
described in the Statement of Additional Information. Investment restrictions
and policies which are fundamental policies may not be changed without the
approval of the holders of a majority of the Fund's outstanding voting
securities, as defined in the 1940 Act which means the lesser of (i) 67% of the
shares represented at a meeting at which more than 50% of the outstanding
shares are represented or (ii) more than 50% of the outstanding shares. Among
its fundamental policies, the Fund may not invest more than 25% of its assets,
taken at market value at the time of each investment, in the securities of
issuers in any particular industry (excluding the U.S. Government and its
agencies and instrumentalities) (For purposes of this restriction, states,
municipalities and their political subdivisions are not considered to be part
of any industry). Investment restrictions and policies that are non-fundamental
policies may be changed by the Board of Trustees without shareholder approval.
As a non-fundamental policy, the Fund may not borrow amounts in excess of 20%
of its total assets taken at market value (including the amount borrowed), and
then only from banks as a temporary measure for extraordinary or emergency
purposes. In addition, the Fund will not purchase securities while borrowings
are outstanding.     
   
  As a non-fundamental policy, the Fund will not invest in securities which
cannot be readily resold because of legal or contractual restrictions or which
cannot otherwise be marketed, redeemed or put to the issuer or a third party,
if at the time of acquisition more than 15% of its total assets would be
invested in such securities. This restriction shall not apply to securities
which mature within seven days or securities which the Board of Trustees of the
Trust has otherwise determined to be liquid pursuant to applicable law.     
 
  The Fund is classified as non-diversified within the meaning of the 1940 Act,
which means that the Fund is not limited by the 1940 Act in the proportion of
its assets that it may invest in obligations of a single issuer. However, the
Fund's investments will be limited so as to qualify as a "regulated investment
company" for purposes of the Code. See "Distributions and Taxes--Taxes". To
qualify, among other requirements, the Trust will limit the Fund's investments
so that, at the close of each quarter of the taxable year, (i) not more than
25% of the market value of the Fund's total assets will be invested in the
securities of a single issuer, and (ii) with respect to 50% of the market value
of its total assets, not more than 5% of the market value of its total assets
will be invested in the securities of a single issuer and the Fund will not own
more than 10% of the outstanding voting securities of a single issuer. For
purposes of this restriction, the Fund will regard each state and each
political subdivision, agency or instrumentality of such state and each multi-
state agency of which such state is a member and each public authority which
issues securities on behalf of a private entity, as a separate issuer, except
that if the security is backed only by the assets and revenues of a non-
government
 
                                       19
<PAGE>
 
entity, then the entity with the ultimate responsibility for the payment of
interest and principal may be regarded as the sole issuer. These tax-related
limitations may be changed by the Trustees of the Trust to the extent necessary
to comply with changes to the Federal tax requirements. A fund which elects to
be classified as "diversified" under the 1940 Act must satisfy the foregoing 5%
and 10% requirements with respect to 75% of its total assets. To the extent
that the Fund assumes large positions in the obligations of a small number of
issuers, the Fund's total return may fluctuate to a greater extent than that of
a diversified company as a result of changes in the financial condition or in
the market's assessment of the issuers.
 
  Investors are referred to the Statement of Additional Information for a
complete description of the Fund's investment restrictions.
 
                            MANAGEMENT OF THE TRUST
 
TRUSTEES
 
  The Trustees of the Trust consist of six individuals, five of whom are not
"interested persons" of the Trust as defined in the 1940 Act. The Trustees are
responsible for the overall supervision of the operations of the Trust and the
Fund and perform the various duties imposed on the directors or trustees of
investment companies by the 1940 Act.
 
  The Trustees are:
   
  Arthur Zeikel*--President of the Manager and its affiliate, MLAM; President
and Director of Princeton Services, Inc. ("Princeton Services"); Executive Vice
President of ML & Co.; and Director of the Distributor.     
   
  James H. Bodurtha--Director and Executive Vice President, The China Business
Group, Inc.     
   
  Herbert I. London--John M. Olin Professor of Humanities, New York University.
       
  Robert R. Martin--Former Chairman, Kinnard Investments, Inc.     
 
  Joseph L. May--Attorney in private practice.
 
  Andre F. Perold--Professor, Harvard Business School.
- --------
*Interested person, as defined in the 1940 Act, of the Trust.
 
                                       20
<PAGE>
 
MANAGEMENT AND ADVISORY ARRANGEMENTS
   
  The Manager, which is an affiliate of MLAM and is owned and controlled by ML
& Co., a financial services holding company, acts as the manager for the Fund
and provides the Fund with management services. The Manager or MLAM acts as the
investment adviser for more than 130 registered investment companies. MLAM also
offers investment advisory services to individual and institutional accounts.
As of September 30, 1996, the Manager and MLAM had a total of approximately
$214.1 billion in investment company and other portfolio assets under
management, including accounts of certain affiliates of the Manager.     
 
  Subject to the direction of the Trustees, the Manager is responsible for the
actual management of the Fund's portfolio and constantly reviews the Fund's
holdings in light of its own research analysis and that from other relevant
sources. The responsibility for making decisions to buy, sell or hold a
particular security rests with the Manager. The Manager performs certain of the
other administrative services and provides all the office space, facilities,
equipment and necessary personnel for management of the Fund.
   
  Fred K. Stuebe is the Portfolio Manager for the Fund and is responsible for
the day-to-day management of Fund's investment portfolio. He has been a Vice
President of MLAM since 1989.     
   
  Pursuant to the management agreement between the Manager and the Trust on
behalf of the Fund (the "Management Agreement"), the Manager is entitled to
receive from the Fund a monthly fee based upon the average daily net assets of
the Fund at the following annual rates: 0.55% of the average daily net assets
not exceeding $500 million; 0.525% of the average daily net assets exceeding
$500 million but not exceeding $1.0 billion; and 0.50% of the average daily net
assets exceeding $1.0 billion. For the fiscal year ended July 31, 1996, the
total fee payable by the Fund to the Manager was $328,665 (based upon average
net assets of approximately $59.8 million), of which $65,688 was voluntarily
waived.     
   
  The Management Agreement obligates the Trust on behalf of the Fund to pay
certain expenses incurred in the Fund's operations, including, among other
things, the management fee, legal and audit fees, unaffiliated Trustees' fees
and expenses, registration fees, custodian and transfer agency fees, accounting
and pricing costs, and certain of the costs of printing proxies, shareholder
reports, prospectuses and statements of additional information. Accounting
services are provided to the Fund by the Manager, and the Fund reimburses the
Manager for its costs in connection with such services. For the fiscal year
ended July 31, 1996, the Fund reimbursed the Manager $52,951 for accounting
services. For the fiscal year ended July 31, 1996, the ratio of total expenses
to average net assets was .95% for Class A shares, 1.46% for Class B shares,
1.57% for Class C shares and 1.05% for Class D shares.     
 
CODE OF ETHICS
 
  The Board of Trustees of the Trust has adopted a Code of Ethics under Rule
17j-1 of the 1940 Act which incorporates the Code of Ethics of the Manager
(together, the "Codes"). The Codes significantly restrict the personal
investing activities of all employees of the Manager and, as described below,
impose additional, more onerous, restrictions on fund investment personnel.
 
 
                                       21
<PAGE>
 
  The Codes require that all employees of the Manager preclear any personal
securities investment (with limited exceptions, such as government
securities). The preclearance requirement and associated procedures are
designed to identify any substantive prohibition or limitation applicable to
the proposed investment. The substantive restrictions applicable to all
employees of the Manager include a ban on acquiring any securities in a "hot"
initial public offering and a prohibition from profiting on short-term trading
in securities. In addition, no employee may purchase or sell any security
which at the time is being purchased or sold (as the case may be), or to the
knowledge of the employee is being considered for purchase or sale, by any
fund advised by the Manager. Furthermore, the Codes provide for trading
"blackout periods" which prohibit trading by investment personnel of the Fund
within periods of trading by the Fund in the same (or equivalent) security (15
or 30 days depending upon the transaction).
 
TRANSFER AGENCY SERVICES
   
  Merrill Lynch Financial Data Services, Inc. (the "Transfer Agent"), which is
a wholly-owned subsidiary of ML&Co., acts as the Trust's transfer agent
pursuant to a transfer agency, dividend disbursing agency and shareholder
servicing agency agreement (the "Transfer Agency Agreement"). Pursuant to the
Transfer Agency Agreement, the Transfer Agent is responsible for the issuance,
transfer and redemption of shares and the opening and maintenance of
shareholder accounts. Pursuant to the Transfer Agency Agreement, the Fund pays
the Transfer Agent an annual fee of $11.00 per Class A or Class D shareholder
account and $14.00 per Class B and Class C shareholder account, and the
Transfer Agent is entitled to reimbursement from the Fund for out-of-pocket
expenses incurred by the Transfer Agent under the Transfer Agency Agreement.
For the fiscal year ended July 31, 1996, the Fund paid the Transfer Agent a
total fee of $39,835 pursuant to the Transfer Agency Agreement for providing
transfer agency services. At September 30, 1996, the Fund had 203 Class A
shareholder accounts, 1,752 Class B shareholder accounts, 51 Class C
shareholder accounts and 30 Class D shareholder accounts. At this level of
accounts, the annual fee payable to the Transfer Agent would aggregate
approximately $27,805, plus miscellaneous and out-of-pocket expenses.     
 
                              PURCHASE OF SHARES
   
  The Distributor, an affiliate of the Manager, MLAM and Merrill Lynch, acts
as the Distributor of the shares of the Fund. Shares of the Fund are offered
continuously for sale by the Distributor and other eligible securities dealers
(including Merrill Lynch). Shares of the Fund may be purchased from securities
dealers or by mailing a purchase order directly to the Transfer Agent. The
minimum initial purchase is $1,000 and the minimum subsequent purchase is $50.
       
  The Fund offers its shares in four classes at a public offering price equal
to the next determined net asset value per share plus sales charges imposed
either at the time of purchase or on a deferred basis depending upon the class
of shares selected by the investor under the Merrill Lynch Select Pricing SM
System, as described below. The applicable offering price for purchase orders
is based upon the net asset value of the Fund next determined after receipt of
the purchase orders by the Distributor. As to purchase orders received by
securities dealers prior to the close of business on the New York Stock
Exchange (the "NYSE") (generally, 4:00 p.m., New York time), which includes
orders received after the close of business on the previous day, the
applicable offering price will be based on the net asset value determined as
of 15 minutes after the close of business on the NYSE on that day, provided
the Distributor in turn receives the order from the securities     
 
                                      22
<PAGE>
 
   
dealer prior to 30 minutes after the close of business on the NYSE, on that
day. If the purchase orders are not received by the Distributor prior to 30
minutes after the close of business on the NYSE, such orders shall be deemed
received on the next business day. The Trust or the Distributor may suspend
the continuous offering of the Fund's shares of any class at any time in
response to conditions in the securities markets or otherwise and may
thereafter resume such offering from time to time. Any order may be rejected
by the Distributor or the Trust. Neither the Distributor nor the dealers are
permitted to withhold placing orders to benefit themselves by a price change.
Merrill Lynch may charge its customers a processing fee (presently $4.85) to
confirm a sale of shares to such customers. Purchases directly through the
Transfer Agent are not subject to the processing fee.     
 
  The Fund issues four classes of shares under the Merrill Lynch Select
Pricing SM System, which permits each investor to choose the method of
purchasing shares that the investor believes is most beneficial given the
amount of the purchase, the length of time the investor expects to hold the
shares and other relevant circumstances. Shares of Class A and Class D are
sold to investors choosing the initial sales charge alternatives and shares of
Class B and Class C are sold to investors choosing the deferred sales charge
alternatives. Investors should determine whether under their particular
circumstances it is more advantageous to incur an initial sales charge or to
have the entire initial purchase price invested in the Fund with the
investment thereafter being subject to a contingent deferred sales charge and
ongoing distribution fees. A discussion of the factors that investors should
consider in determining the method of purchasing shares under the Merrill
Lynch Select Pricing SM System is set forth under "Merrill Lynch Select
Pricing SM System" on page 4.
   
  Each Class A, Class B, Class C and Class D share of the Fund represents
identical interests in the investment portfolio of the Fund and has the same
rights, except that Class B, Class C and Class D shares bear the expenses of
the ongoing account maintenance fees, and Class B and Class C shares bear the
expenses of the ongoing distribution fees and the additional incremental
transfer agency costs resulting from the deferred sales charge arrangements.
The deferred sales charges, distribution and account maintenance fees that are
imposed on Class B and Class C shares, as well as the account maintenance fees
that are imposed on Class D shares, will be imposed directly against those
classes and not against all assets of the Fund and, accordingly, such charges
will not affect the net asset value of any other class or have any impact on
investors choosing another sales charge option. Dividends paid by the Fund for
each class of shares will be calculated in the same manner at the same time
and will differ only to the extent that account maintenance and distribution
fees and any incremental transfer agency costs relating to a particular class
are borne exclusively by that class. Class B, Class C and Class D shares each
have exclusive voting rights with respect to the Rule 12b-1 distribution plan
adopted with respect to such class pursuant to which account maintenance
and/or distribution fees are paid. See "Distribution Plans" below. Each class
has different exchange privileges. See "Shareholder Services--Exchange
Privilege".     
 
  Investors should understand that the purpose and function of the initial
sales charges with respect to Class A and Class D shares are the same as those
of the deferred sales charges with respect to Class B and Class C shares in
that the sales charges applicable to each class provide for the financing of
the distribution of the shares of the Fund. The distribution-related revenues
paid with respect to a class will not be used to finance the distribution
expenditures of another class. Sales personnel may receive different
compensation for selling different classes of shares. Investors are advised
that only Class A and Class D shares may be available for purchase through
securities dealers, other than Merrill Lynch, which are eligible to sell
shares.
 
 
                                      23
<PAGE>
 
  The following table sets forth a summary of the distribution arrangements
for each class of shares under the Merrill Lynch Select PricingSM System.
 
 
<TABLE>    
<CAPTION>
                                          ACCOUNT
                                        MAINTENANCE DISTRIBUTION
  CLASS          SALES CHARGE(1)            FEE         FEE        CONVERSION FEATURE
- ---------------------------------------------------------------------------------------
  <S>     <C>                           <C>         <C>          <C>
    A         Maximum 4.00% initial         No           No                No
             sales charge(/2/)(/3/)
- ---------------------------------------------------------------------------------------
    B     CDSC for a period of 4 years,    0.25%        0.25%     B shares convert to
          at a rate of 4.0% during the                           D shares automatically
           first year, decreasing 1.0%                            after approximately
                 annually to 0.0%(/4/)                               ten years(/5/)
- ---------------------------------------------------------------------------------------
    C      1.0% CDSC for one year(/6/)     0.25%        0.35%              No
- ---------------------------------------------------------------------------------------
    D         Maximum 4.00% initial        0.10%         No                No
                sales charge(/3/)
</TABLE>    
 
- --------
   
(1) Initial sales charges are imposed at the time of purchase as a percentage
    of the offering price. CDSCs are imposed if the redemption occurs within
    the applicable CDSC time period. The charge will be assessed on an amount
    equal to the lesser of the proceeds of redemption or the cost of the
    shares being redeemed.     
(2) Offered only to eligible investors. See "Initial Sales Charge
    Alternatives--Class A and Class D Shares--Eligible Class A Investors".
   
(3) Reduced for purchases of $25,000 or more and waived for purchases of Class
    A shares in connection with certain fee-based programs. Class A and Class
    D share purchases of $1,000,000 or more may not be subject to an initial
    sales charge but instead may subject to a CDSC if redeemed within one
    year. Such CDSC may be waived in connection with redemptions to fund
    participation in certain fee-based programs.     
   
(4) The CDSC may be modified in connection with redemptions to fund
    participation in certain fee-based programs.     
   
(5) The conversion period for dividend reinvestment shares and certain fee-
    based programs may be modified. Also, Class B shares of certain other
    MLAM-advised mutual funds into which exchanges may be made have an eight
    year conversion period. If Class B shares of the Fund are exchanged for
    Class B shares of another MLAM-advised mutual fund, the conversion period
    applicable to the Class B shares acquired in the exchange will apply, and
    the holding period for the shares exchanged will be tacked onto the
    holding period for the shares acquired.     
   
(6) The CDSC may be waived in connection with redemptions to fund
    participation in certain fee-based programs.     
 
INITIAL SALES CHARGE ALTERNATIVES--CLASS A AND CLASS D SHARES
 
  Investors choosing the initial sales charge alternatives who are eligible to
purchase Class A shares should purchase Class A shares rather than Class D
shares because there is an account maintenance fee imposed on Class D shares.
 
  The public offering price of Class A and Class D shares for purchasers
choosing the initial sales charge alternative is the next determined net asset
value plus varying sales charges (i.e., sales loads), as set forth below.
<TABLE>
<CAPTION>
                             SALES CHARGE   SALES CHARGE       DISCOUNT TO
                             AS PERCENTAGE AS PERCENTAGE*    SELECTED DEALERS
                              OF OFFERING    OF THE NET    AS PERCENTAGE OF THE
AMOUNT OF PURCHASE               PRICE     AMOUNT INVESTED    OFFERING PRICE
- ------------------           ------------- --------------- --------------------
<S>                          <C>           <C>             <C>
Less than $25,000...........     4.00%          4.17%              3.75%
$25,000 but less than
 $50,000....................     3.75           3.90               3.50
$50,000 but less than
 $100,000...................     3.25           3.36               3.00
$100,000 but less than
 $250,000...................     2.50           2.56               2.25
$250,000 but less than
 $1,000,000.................     1.50           1.52               1.25
$1,000,000 and over**.......     0.00           0.00               0.00
</TABLE>
 
                                      24
<PAGE>
 
- --------
 * Rounded to the nearest one-hundredth percent.
   
** The initial sales charge may be waived on Class A and Class D purchases of
   $1,000,000 or more and on Class A purchases in connection with certain fee-
   based programs. If the sales charge is waived in connection with a purchase
   of $1,000,000 or more, such purchases may be subject to a CDSC of 1.0% if
   the shares are redeemed within one year after purchase. Such CDSC may be
   waived in connection with redemptions to fund participation in certain fee-
   based programs. The charge will be assessed on an amount equal to the lesser
   of the proceeds of redemption or the cost of the shares being redeemed.     
   
  The Distributor may reallow discounts to selected dealers and retain the
balance over such discounts. At times the Distributor may reallow the entire
sales charge to such dealers. Since securities dealers selling Class A and
Class D shares of the Fund will receive a concession equal to most of the sales
charge, they may be deemed to be underwriters under the Securities Act of 1933,
as amended. For the fiscal year ended July 31, 1996, the Fund sold 27,717 Class
A shares for aggregate net proceeds to the Fund of $288,349. The gross sales
charges for the sale of Class A shares of the Fund for the year were $54,038,
of which $318 and $53,720 were received by the Distributor and Merrill Lynch,
respectively. For the fiscal year ended July 31, 1996 the Distributor received
no CDSCs with respect to redemption within one year after purchase of Class A
shares purchased subject to a front-end sales charge waiver. For the fiscal
year ended July 31, 1996, the Fund sold 47,017 Class D shares for aggregate net
proceeds to the Fund of $496,152. The gross sales charges for the sale of Class
D shares of the Fund for the year were $6,395, of which $116 and $6,279 were
received by the Distributor and Merrill Lynch, respectively. For the fiscal
year ended July 31, 1996, the Distributor received no CDSCs with respect to
redemption within one year after purchase of Class D shares purchased subject
to a front-end sales charge waiver.     
   
  Eligible Class A Investors. Class A shares are offered to a limited group of
investors and also will be issued upon reinvestment of dividends from
outstanding Class A shares. Investors that currently own Class A shares of the
Fund in a shareholder account are entitled to purchase additional Class A
shares of the Fund in that account. Class A shares are available at net asset
value to corporate warranty insurance reserve fund programs provided that the
program has $3 million or more initially invested in MLAM-advised mutual funds.
Also eligible to purchase Class A shares at net asset value are participants in
certain investment programs including TMASM Managed Trusts to which Merrill
Lynch Trust Company provides discretionary trustee services, collective
investment trusts for which Merrill Lynch Trust Company serves as trustee and
purchases made in connection with certain fee-based programs. In addition,
Class A shares are offered at net asset value to ML & Co. and its subsidiaries
and their directors and employees and to members of the Boards of MLAM-advised
investment companies, including the Trust. Certain persons who acquired shares
of certain MLAM-advised closed-end funds in their initial offerings who wish to
reinvest the net proceeds from a sale of their closed-end fund shares of common
stock in shares of the Fund also may purchase Class A shares of the Fund if
certain conditions set forth in the Statement of Additional Information are
met. In addition, Class A shares of the Fund and certain other MLAM-advised
mutual funds are offered at net asset value to shareholders of Merrill Lynch
Senior Floating Rate Fund, Inc. and, if certain conditions set forth in the
Statement of Additional Information are met, to shareholders of Merrill Lynch
Municipal Strategy Fund, Inc. and Merrill Lynch High Income Municipal Bond
Fund, Inc. who wish to reinvest the net proceeds from a sale of certain of
their shares of common stock pursuant to a tender offer conducted by such funds
in shares of the Fund and certain other MLAM-advised mutual funds.     
 
  Reduced Initial Sales Charges. No initial sales charges are imposed upon
Class A and Class D shares issued as a result of the automatic reinvestment of
dividends or capital gains distributions. Class A and Class
 
                                       25
<PAGE>
 
   
D sales charges also may be reduced under a Right of Accumulation and a Letter
of Intention. Class A shares are offered at net asset value to certain
eligible Class A investors as set forth above under "Eligible Class A
Investors". See "Shareholder Services--Fee-Based Programs". Class A and Class
D shares are offered at net asset value to Employee Access Accounts SM
available through qualified employers which provide employer-sponsored
retirement and savings plans that are eligible to purchase such shares at net
asset value. Class A and Class D shares are offered at net asset value to
shareholders of Merrill Lynch Municipal Strategy Fund, Inc. and Merrill Lynch
High Income Municipal Bond Fund, Inc. who wish to reinvest in shares of the
Fund the net proceeds from a sale of certain of their shares of common stock,
pursuant to tender offers conducted by those funds.     
 
  Class D shares are offered at net asset value without sales charge to an
investor who has a business relationship with a Merrill Lynch financial
consultant, if certain conditions set forth in the Statement of Additional
Information are met. Class D shares may be offered at net asset value in
connection with the acquisition of assets of other investment companies.
 
  Additional information concerning these reduced initial sales charges is set
forth in the Statement of Additional Information.
 
DEFERRED SALES CHARGE ALTERNATIVES--CLASS B AND CLASS C SHARES
  Investors choosing the deferred sales charge alternatives should consider
Class B shares if they intend to hold their shares for an extended period of
time and Class C shares if they are uncertain as to the length of time they
intend to hold their assets in MLAM-advised mutual funds.
   
  The public offering price of Class B and Class C shares for investors
choosing the deferred sales charge alternatives is the next determined net
asset value per share without the imposition of a sales charge at the time of
purchase. As discussed below, Class B shares are subject to a four-year CDSC,
while Class C shares are subject only to a one-year 1.0% CDSC. On the other
hand, approximately ten years after Class B shares are issued, such Class B
shares, together with shares issued upon dividend reinvestment with respect to
those shares, are automatically converted into Class D shares of the Fund and
thereafter will be subject to lower continuing fees. See "Conversion of Class
B Shares to Class D Shares" below. Both Class B and Class C shares are subject
to an account maintenance fee of 0.25% of net assets and Class B and Class C
shares are subject to distribution fees of 0.25% and 0.35%, respectively, of
net assets as discussed below under "Distribution Plans". The proceeds from
the account maintenance fees are used to compensate Merrill Lynch for
providing continuing account maintenance activities.     
 
  Class B and Class C shares are sold without an initial sales charge so that
the Fund will receive the full amount of the investor's purchase payment.
Merrill Lynch compensates its financial consultants for selling Class B and
Class C shares at the time of purchase from its own funds. See "Distribution
Plans" below.
 
  Proceeds from the CDSC and the distribution fee are paid to the Distributor
and are used in whole or in part by the Distributor to defray the expenses of
dealers (including Merrill Lynch) related to providing distribution-related
services to the Fund in connection with the sale of the Class B and Class C
shares, such as the payment of compensation to financial consultants for
selling Class B and Class C shares, from the dealer's own funds. The
combination of the CDSC and the ongoing distribution fee facilitates the
ability of the Fund to sell the Class B and Class C shares without a sales
charge being deducted at the time of purchase.
 
                                      26
<PAGE>
 
Approximately ten years after issuance, Class B shares will convert
automatically into Class D shares of the Fund, which are subject to a lower
account maintenance fee and no distribution fee; Class B shares of certain
other MLAM-advised mutual funds into which exchanges may be made convert into
Class D shares automatically after approximately eight years. If Class B shares
of the Fund are exchanged for Class B shares of another MLAM-advised mutual
fund, the conversion period applicable to the Class B shares acquired in the
exchange will apply, and the holding period for the shares exchanged will be
tacked onto the holding period for the shares acquired.
   
  Imposition of the CDSC and the distribution fee on Class B and Class C shares
is limited by the NASD asset-based sales charge rule. See "Limitations on the
Payment of Deferred Sales Charges" below. Class B shareholders of the Fund
exercising the exchange privilege described under "Shareholder Services--
Exchange Privilege" will continue to be subject to the Fund's CDSC schedule if
such schedule is higher than the CDSC schedule relating to the Class B shares
acquired as a result of the exchange.     
 
  Contingent Deferred Sales Charges--Class B Shares. Class B shares which are
redeemed within four years of purchase may be subject to a CDSC at the rates
set forth below charged as a percentage of the dollar amount subject thereto.
The charge will be assessed on an amount equal to the lesser of the proceeds of
redemption value or the cost of the shares being redeemed. Accordingly, no CDSC
will be imposed on increases in net asset value above the initial purchase
price. In addition, no CDSC will be assessed on shares derived from
reinvestment of dividends or capital gains distributions.
 
  The following table sets forth the rates of the Class B CDSC:
 
<TABLE>
<CAPTION>
                                                                      CLASS B
                                                                     CDSC AS A
                                                                   PERCENTAGE OF
                                                                   DOLLAR AMOUNT
     YEAR SINCE PURCHASE                                            SUBJECT TO
     PAYMENT MADE                                                     CHARGE
     -------------------                                           -------------
     <S>                                                           <C>
     0-1..........................................................      4.0%
     1-2..........................................................      3.0%
     2-3..........................................................      2.0%
     3-4..........................................................      1.0%
     4 and thereafter.............................................      0.0%
</TABLE>
   
  For the fiscal year ended July 31, 1996, the Distributor received CDSCs of
$58,961 with respect to redemptions of Class B shares, all of which were paid
to Merrill Lynch.     
 
  In determining whether a CDSC is applicable to a redemption, the calculation
will be determined in the manner that results in the lowest applicable rate
being charged. Therefore, it will be assumed that the redemption is first of
shares held for over four years or shares acquired pursuant to reinvestment of
dividends or distributions and then of shares held longest during the four-year
period. The charge will not be applied to dollar amounts representing an
increase in the net asset value since the time of purchase. A transfer of
shares from a shareholder's account to another account will be assumed to be
made in the same order as redemption.
 
  To provide an example, assume an investor purchased 100 shares at $10 per
share (at a cost of $1,000) and in the third year after purchase, the net asset
value per share is $12 and, during such time, the investor
 
                                       27
<PAGE>
 
has acquired 10 additional shares upon dividend reinvestment. If at such time
the investor makes his or her first redemption of 50 shares (proceeds of $600),
10 shares will not be subject to a CDSC because of dividend reinvestment. With
respect to the remaining 40 shares, the CDSC is applied only to the original
cost of $10 per share and not to the increase in net asset value of $2 per
share. Therefore, $400 of the $600 redemption proceeds will be charged at a
rate of 2.0% (the applicable rate in the third year after purchase).
          
  The Class B CDSC is waived on redemptions of shares following the death or
disability (as defined in the Code) of a shareholder. Additional information
concerning the waiver of the Class B CDSC is set forth in the Statement of
Additional Information. The terms of the CDSC may be modified in connection
with redemptions to fund participation in certain fee-based programs. See
"Shareholder Services--Fee-Based Programs".     
   
  Contingent Deferred Sales Charges--Class C Shares. Class C shares which are
redeemed within one year of purchase may be subject to a 1.0% CDSC charged as a
percentage of the dollar amount subject thereto. The charge will be assessed on
an amount equal to the lesser of the proceeds of redemption or the cost of the
shares being redeemed. Accordingly, no Class C CDSC will be imposed on
increases in net asset value above the initial purchase price. In addition, no
Class C CDSC will be assessed on shares derived from reinvestment of dividends
or capital gains distributions. For the fiscal year ended July 31, 1996, the
Distributor received CDSCs of $27 with respect to redemptions of Class C
shares, all of which were paid to Merrill Lynch. No CDSC will be assessed in
connection with redemptions to fund participation in certain fee-based
programs. See "Shareholder Services--Fee-Based Programs".     
 
  In determining whether a Class C CDSC is applicable to a redemption, the
calculation will be determined in the manner that results in the lowest
possible rate being charged. Therefore, it will be assumed that the redemption
is first of shares held for over one year or shares acquired pursuant to
reinvestment of dividends or distributions and then of shares held longest
during the one-year period. The charge will not be applied to dollar amounts
representing an increase in the net asset value since the time of purchase. A
transfer of shares from a shareholder's account to another account will be
assumed to be made in the same order as a redemption.
 
  Conversion of Class B Shares to Class D Shares. After approximately ten years
(the "Conversion Period"), Class B shares will be converted automatically into
Class D shares of the Fund. Class D shares are subject to an ongoing account
maintenance fee of 0.10% of net assets but are not subject to the distribution
fee that is borne by Class B shares. Automatic conversion of Class B shares
into Class D shares will occur at least once each month (on the "Conversion
Date") on the basis of the relative net asset values of the shares of the two
classes on the Conversion Date, without the imposition of any sales load, fee
or other charge. Conversion of Class B shares to Class D shares will not be
deemed a purchase or sale of the shares for Federal income tax purposes.
 
  In addition, shares purchased through reinvestment of dividends on Class B
shares also will convert automatically to Class D shares. The Conversion Date
for dividend reinvestment shares will be calculated taking into account the
length of time the shares underlying such dividend reinvestment shares were
outstanding. If at a Conversion Date the conversion of Class B shares to Class
D shares of the Fund in a single account will result in less than $50 worth of
Class B shares being left in the account, all of the Class B shares of the Fund
held in the account on the Conversion Date will be converted to Class D shares
of the Fund.
 
                                       28
<PAGE>
 
  Share certificates for Class B shares of the Fund to be converted must be
delivered to the Transfer Agent at least one week prior to the Conversion Date
applicable to those shares. In the event such certificates are not received by
the Transfer Agent at least one week prior to the Conversion Date, the related
Class B shares will convert to Class D shares on the next scheduled Conversion
Date after such certificates are delivered.
 
  In general, Class B shares of equity MLAM-advised mutual funds will convert
approximately eight years after initial purchase, and Class B shares of taxable
and tax-exempt fixed income MLAM-advised mutual funds will convert
approximately ten years after initial purchase. If, during the Conversion
Period, a shareholder exchanges Class B shares with an eight-year Conversion
Period for Class B shares with a ten-year Conversion Period, or vice versa, the
Conversion Period applicable to the Class B shares acquired in the exchange
will apply, and the holding period for the shares exchanged will be tacked onto
the holding period for the shares acquired.
   
  The Conversion Period may be modified for investors that participate in
certain fee-based programs. See "Shareholder Services--Fee-Based Programs".
    
DISTRIBUTION PLANS
 
  The Fund has adopted separate distribution plans for Class B, Class C and
Class D shares pursuant to Rule 12b-1 under the 1940 Act (each a "Distribution
Plan") with respect to the account maintenance and/or distribution fees paid by
the Fund to the Distributor with respect to such classes. The Class B and Class
C Distribution Plans provide for the payment of account maintenance fees and
distribution fees, and the Class D Distribution Plan provides for the payment
of account maintenance fees.
 
  The Distribution Plans for Class B, Class C and Class D shares each provide
that the Fund pays the Distributor an account maintenance fee relating to the
shares of the relevant class, accrued daily and paid monthly, at the annual
rates of 0.25%, 0.25% and 0.10%, respectively, of the average daily net assets
of the Fund attributable to shares of the relevant class in order to compensate
the Distributor and Merrill Lynch (pursuant to a sub-agreement) in connection
with account maintenance activities.
 
  The Distribution Plans for Class B and Class C shares each provide that the
Fund also pays the Distributor a distribution fee relating to the shares of the
relevant class, accrued daily and paid monthly, at the annual rate of 0.25% and
0.35%, respectively, of the average daily net assets of the Fund attributable
to the shares of the relevant class in order to compensate the Distributor and
Merrill Lynch (pursuant to a sub-agreement) for providing shareholder and
distribution services, and bearing certain distribution-related expenses of the
Fund, including payments to financial consultants for selling Class B and Class
C shares of the Fund. The Distribution Plans relating to Class B and Class C
shares are designed to permit an investor to purchase Class B and Class C
shares through dealers without the assessment of an initial sales charge and at
the same time permit the dealer to compensate its financial consultants in
connection with the sale of the Class B and Class C shares. In this regard, the
purpose and function of the ongoing distribution fee and the CDSC are the same
as those of the initial sales charge with respect to the Class A and Class D
shares of the Fund in that the deferred sales charges provide for the financing
of the distribution of the Fund's Class B and Class C shares.
   
  For the fiscal year ended July 31, 1996, the Fund paid the Distributor
$258,745 pursuant to the Class B Distribution Plan (based on average net assets
subject to such Class B Distribution Plan of approximately     
 
                                       29
<PAGE>
 
   
$51.7 million), all of which was paid to Merrill Lynch for providing account
maintenance and distribution-related activities and services in connection with
Class B shares. For the fiscal year ended July 31, 1996, the Fund paid the
Distributor $5,345 pursuant to the Class C Distribution Plan (based on average
net assets subject to such Class C Distribution Plan of approximately
$890,786), all of which was paid to Merrill Lynch for providing account
maintenance and distribution-related activities and services in connection with
Class C shares. For the fiscal year ended July 31, 1996, the Fund paid the
Distributor $713 pursuant to the Class D Distribution Plan (based on average
net assets subject to such Class D Distribution Plan of approximately
$713,042), all of which was paid to Merrill Lynch for providing account
maintenance activities in connection with Class D shares. At September 30,
1996, the net assets of the Fund subject to the Class B Distribution Plan
aggregated approximately $46.4 million. At this asset level, the annual fee
payable pursuant to such Class B Distribution Plan would aggregate
approximately $231,870. At September 30, 1996, the net assets of the Fund
subject to the Class C Distribution Plan aggregated approximately $1.3 million.
At this asset level, the annual fee payable pursuant to such Class C
Distribution Plan would aggregate approximately $7,511. At September 30, 1996,
the net assets of the Fund subject to the Class D Distribution Plan aggregated
approximately $743,522. At this asset level, the annual fee payable pursuant to
such Class D Distribution Plan would aggregate approximately $744.     
   
  The payments under the Distribution Plans are based on a percentage of
average daily net assets attributable to the shares regardless of the amount of
expenses incurred and, accordingly, distribution-related revenues from the
Distribution Plans may be more or less than distribution-related expenses.
Information with respect to the distribution-related revenues and expenses is
presented to the Trustees for their consideration in connection with their
deliberations as to the continuance of the Class B and Class C Distribution
Plans. This information is presented annually as of December 31 of each year on
a "fully allocated accrual" basis and quarterly on a "direct expense and
revenue/cash" basis. On the fully allocated accrual basis, revenues consist of
the account maintenance fees, distribution fees, the CDSCs and certain other
related revenues, and expenses consist of financial consultant compensation,
branch office and regional operation center selling and transaction processing
expenses, advertising, sales promotion and marketing expenses, corporate
overhead and interest expense. On the direct expense and revenue/cash basis,
revenues consist of the account maintenance fees, distribution fees and CDSCs,
and the expenses consist of financial consultant compensation. As of December
31, 1995, the fully allocated accrual expenses incurred by the Distributor and
Merrill Lynch for the period since the commencement of operations of Class B
shares exceeded fully allocated accrual revenues by approximately $971,000
(1.82% of Class B net assets at that date). As of July 31, 1996, direct cash
revenues for the period since the commencement of operations of Class B shares
exceeded direct cash expenses by $402,491 (.83% of Class B net assets at that
date). Similar fully allocated accrual data for Class C shares is not presented
because such revenues and expenses for the period from October 21, 1994
(commencement of operations) to December 31, 1995 are de minimis. As of July
31, 1996, direct cash revenues for the period since the commencement of
operations of Class C shares exceeded direct cash expenses by $1,462 (.12% of
Class C net assets at that date).     
 
LIMITATIONS ON THE PAYMENT OF DEFERRED SALES CHARGES
   
  The maximum sales charge rule in the Conduct Rules of the National
Association of Securities Dealers, Inc. ("NASD") imposes a limitation on
certain asset-based sales charges such as the distribution fee and the CDSC
borne by the Class B and Class C shares, but not the account maintenance fee.
The maximum sales charge rule is applied separately to each class. As
applicable to the Fund, the maximum sales charge rule     
 
                                       30
<PAGE>
 
limits the aggregate of distribution fee payments and CDSCs payable by the Fund
to (1) 6.25% of eligible gross sales of Class B shares and Class C shares,
computed separately (defined to exclude shares issued pursuant to dividend
reinvestments and exchanges) plus (2) interest on the unpaid balance for the
respective class, computed separately, at the prime rate plus 1% (the unpaid
balance being the maximum amount payable minus amounts received from the
payment of the distribution fee and the CDSC). In connection with the Class B
shares, the Distributor has voluntarily agreed to waive interest charges on the
unpaid balance in excess of 0.50% of eligible gross sales. Consequently, the
maximum amount payable to the Distributor (referred to as the "voluntary
maximum") in connection with the Class B shares is 6.75% of eligible gross
sales. The Distributor retains the right to stop waiving the interest charges
at any time. To the extent payments would exceed the voluntary maximum, the
Fund will not make further payments of the distribution fee with respect to
Class B shares, and any CDSCs will be paid to the Fund rather than to the
Distributor; however, the Fund will continue to make payments of the account
maintenance fee. In certain circumstances the amount payable pursuant to the
voluntary maximum may exceed the amount payable under the NASD formula. In such
circumstances payments in excess of the amount payable under the NASD formula
will not be made.
 
  The Fund has no obligation with respect to distribution and/or account
maintenance-related expenses incurred by the Distributor and Merrill Lynch in
connection with Class B, Class C and Class D shares, and there is no assurance
that the Trustees of the Trust will approve the continuance of the Distribution
Plans from year to year. However, the Distributor intends to seek annual
continuation of the Distribution Plans. In their review of the Distribution
Plans, the Trustees will be asked to take into consideration expenses incurred
in connection with the account maintenance and/or distribution of each class of
shares separately. The initial sales charges, the account maintenance fees, the
distribution fees and/or the CDSCs received with respect to one class will not
be used to subsidize the sale of shares of another class. Payments of the
distribution fee on Class B shares will terminate upon conversion of those
Class B shares into Class D shares as set forth under "Deferred Sales Charge
Alternatives--Class B and Class C Shares--Conversion of Class B Shares to Class
D Shares".
 
                              REDEMPTION OF SHARES
 
  The Trust is required to redeem for cash all shares of the Fund upon receipt
of a written request in proper form. The redemption price is the net asset
value per share next determined after the initial receipt of proper notice of
redemption. Except for any CDSC which may be applicable, there will be no
charge for redemption if the redemption request is sent directly to the
Transfer Agent. Shareholders liquidating their holdings will receive upon
redemption all dividends reinvested through the date of redemption. The value
of shares at the time of redemption may be more or less than the shareholder's
cost, depending on the market value of the securities held by the Fund at such
time.
 
REDEMPTION
 
  A shareholder wishing to redeem shares may do so without charge by tendering
the shares directly to the Transfer Agent, Merrill Lynch Financial Data
Services, Inc., P.O. Box 45289, Jacksonville, Florida 32232-5289. Redemption
requests delivered other than by mail should be delivered to Merrill Lynch
Financial Data Services, Inc., 4800 Deer Lake Drive East, Jacksonville, Florida
32246-6484. Proper notice of redemption in the case of shares deposited with
the Transfer Agent may be accomplished by a written letter requesting
redemption. Proper notice of redemption in the case of shares for which
certificates have
 
                                       31
<PAGE>
 
been issued may be accomplished by a written letter as noted above accompanied
by certificates for the shares to be redeemed. Redemption requests should not
be sent to the Trust. The notice in either event requires the signature(s) of
all persons in whose name(s) the shares are registered, signed exactly as such
name(s) appear(s) on the Transfer Agent's register. The signature(s) on the
redemption request must be guaranteed by an "eligible guarantor institution" as
such term is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934,
as amended, the existence and validity of which may be verified by the Transfer
Agent through use of industry publications. Notarized signatures are not
sufficient. In certain instances, the Transfer Agent may require additional
documents such as, but not limited to, trust instruments, death certificates,
appointments as executor or administrator, or certificates of corporate
authority. For shareholders redeeming directly with the Transfer Agent,
payments will be mailed within seven days of receipt of a proper notice of
redemption.
 
  At various times the Trust may be requested to redeem Fund shares for which
it has not yet received good payment (e.g., cash, Federal funds or certified
check drawn on a United States bank). The Trust may delay or cause to be
delayed the mailing of a redemption check until such time as it has assured
itself that good payment has been collected for the purchase of such Fund
shares, which will not exceed 10 days.
 
REPURCHASE
   
  The Trust also will repurchase Fund shares through a shareholder's listed
securities dealer. The Trust normally will accept orders to repurchase Fund
shares by wire or telephone from dealers for their customers at the net asset
value next computed after receipt of the order by the dealer, provided that the
request for repurchase is received by the dealer prior to the close of business
on the NYSE (generally, 4:00 p.m., New York time) on the day received, and such
request is received by the Trust from such dealer not later than 30 minutes
after the close of business on the NYSE, on the same day. Dealers have the
responsibility of submitting such repurchase requests to the Trust not later
than 30 minutes after the close of business on the NYSE, in order to obtain
that day's closing price.     
   
  The foregoing repurchase arrangements are for the convenience of shareholders
and do not involve a charge by the Trust (other than any applicable CDSC).
Securities firms which do not have selected dealer agreements with the
Distributor, however, may impose a transaction charge on the shareholder for
transmitting the notice of repurchase to the Trust. Merrill Lynch may charge
its customers a processing fee (presently $4.85) to confirm a repurchase of
shares of such customers. Repurchases directly through the Transfer Agent are
not subject to the processing fee. The Trust reserves the right to reject any
order for repurchase, which right of rejection might adversely affect
shareholders seeking redemption through the repurchase procedure. However, a
shareholder whose order for repurchase is rejected by the Trust may redeem Fund
shares as set forth above.     
   
  Redemption payments will be made within seven days of the proper tender of
the certificates, if any, and stock power or letter requesting redemption, in
each instance with signatures guaranteed as noted above.     
 
REINSTATEMENT PRIVILEGE--CLASS A AND CLASS D SHARES
   
  Shareholders who have redeemed their Class A or Class D shares have a
privilege to reinstate their accounts by purchasing Class A or Class D shares,
as the case may be, of the Fund at net asset value without a sales charge up to
the dollar amount redeemed. The reinstatement privilege may be exercised by
sending a notice of exercise along with a check for the amount to be reinstated
to the Transfer Agent within 30 days     
 
                                       32
<PAGE>
 
   
after the date the request for redemption was accepted by the Transfer Agent
or the Distributor. Alternatively, the reinstatement privilege may be
exercised through the investor's Merrill Lynch Financial Consultant within 30
days after the date the request for redemption was accepted by the Transfer
Agent or the Distributor. The reinstatement will be made at the net asset
value per share next determined after the notice of reinstatement is received
and cannot exceed the amount of the redemption proceeds.     
 
                             SHAREHOLDER SERVICES
 
  The Trust offers a number of shareholder services and investment plans
designed to facilitate investment in shares of the Fund. Full details as to
each of such services, copies of the various plans described below, and
instructions as to how to participate in the various services or plans, or to
change options with respect thereto, can be obtained from the Trust by calling
the telephone number on the cover page hereof or from the Distributor or
Merrill Lynch. Included in such services are the following:
   
  Investment Account. Each shareholder whose account is maintained at the
Transfer Agent has an Investment Account and will receive statements, at least
quarterly, from the Transfer Agent. These statements will serve as transaction
confirmations for automatic investment purchases and the reinvestment of
ordinary income dividends and long-term capital gains distributions. The
statements also will show any other activity in the account since the
preceding statement. Shareholders also will receive separate transaction
confirmations for each purchase or sale transaction other than automatic
investment purchases and the reinvestment of ordinary income dividends and
long-term capital gains distributions. Shareholders may make additions to
their Investment Account at any time by mailing a check directly to the
Transfer Agent. Shareholders also may maintain their accounts through Merrill
Lynch. Upon the transfer of shares out of a Merrill Lynch brokerage account,
an Investment Account in the transferring shareholder's name will be opened
automatically at the Transfer Agent. Shareholders considering transferring
their Class A or Class D shares from Merrill Lynch to another brokerage firm
or financial institution should be aware that, if the firm to which the Class
A or Class D shares are to be transferred will not take delivery of shares of
the Fund, a shareholder either must redeem the Class A or Class D shares
(paying any applicable CDSC) so that the cash proceeds can be transferred to
the account at the new firm or such shareholder must continue to maintain an
Investment Account at the Transfer Agent for those Class A or Class D shares.
Shareholders interested in transferring their Class B or Class C shares from
Merrill Lynch and who do not wish to have an Investment Account maintained for
such shares at the Transfer Agent may request their new brokerage firm to
maintain such shares in an account registered in the name of the brokerage
firm for the benefit of the shareholder at the Transfer Agent.     
   
  Exchange Privilege. U.S. shareholders of each class of shares of the Fund
each have an exchange privilege with certain other MLAM-advised mutual funds.
There is currently no limitation on the number of times a shareholder may
exercise the exchange privilege. The exchange privilege may be modified or
terminated at any time in accordance with the rules of the Commission.     
   
  Under the Merrill Lynch Select Pricing SM System, Class A shareholders may
exchange Class A shares of the Fund for Class A shares of a second MLAM-
advised mutual fund if the shareholder holds any Class A shares of the second
fund in his or her account in which the exchange is made at the time of the
exchange or is otherwise eligible to purchase Class A shares of the second
fund. If the Class A shareholder wants to     
 
                                      33
<PAGE>
 
   
exchange Class A shares for shares of a second MLAM-advised mutual fund, and
the shareholder does not hold Class A shares of the second fund in his or her
account at the time of the exchange and is not otherwise eligible to acquire
Class A shares of the second fund, the shareholder will receive Class D shares
of the second fund as a result of the exchange. Class D shares also may be
exchanged for Class A shares of a second MLAM-advised mutual fund at any time
as long as, at the time of the exchange, the shareholder holds Class A shares
of the second fund in the account in which the exchange is made or is otherwise
eligible to purchase Class A shares of the second fund.     
 
  Exchanges of Class A and Class D shares are made on the basis of the relative
net asset values per Class A or Class D share, respectively, plus an amount
equal to the difference, if any, between the sales charge previously paid on
the Class A or Class D shares being exchanged and the sales charge payable at
the time of the exchange on the shares being acquired.
 
  Class B, Class C and Class D shares are exchangeable with shares of the same
class of other MLAM-advised mutual funds.
   
  Shares of the Fund which are subject to a CDSC are exchangeable on the basis
of relative net asset value per share without the payment of any CDSC that
might otherwise be due upon redemption of the shares of the Fund. For purposes
of computing the CDSC that may be payable upon a disposition of the shares
acquired in the exchange, the holding period for the previously owned shares of
the Fund is "tacked" to the holding period for the newly acquired shares of the
other fund.     
 
  Class A, Class B, Class C and Class D shares also are exchangeable for shares
of certain MLAM-advised money market funds specifically designated as available
for exchange by holders of Class A, Class B, Class C or Class D shares. The
period of time that Class A, Class B, Class C or Class D shares are held in a
money market fund, however, will not count toward satisfaction of the holding
period requirement for reduction of any CDSC imposed on such shares, if any,
and, with respect to Class B shares, toward satisfaction of the Conversion
Period.
 
  Class B shareholders of the Fund exercising the exchange privilege will
continue to be subject to the Fund's CDSC schedule if such schedule is higher
than the CDSC schedule relating to the new Class B shares. In addition, Class B
shares of the Fund acquired through use of the exchange privilege will be
subject to the Fund's CDSC schedule if such schedule is higher than the CDSC
schedule relating to the Class B shares of the MLAM-advised mutual fund from
which the exchange has been made.
 
  Exercise of the exchange privilege is treated as a sale for Federal and
Minnesota income and corporate franchise tax purposes. For further information,
see "Shareholder Services--Exchange Privilege" in the Statement of Additional
Information.
       
       
  Automatic Reinvestment of Dividends and Capital Gains Distributions. All
dividends and capital gains distributions are reinvested automatically in full
and fractional shares of the Fund, without a sales charge, at the net asset
value per share at the close of business on the monthly payment date for such
dividends and distributions. A shareholder may at any time, by written
notification or by telephone (1-800-MER-FUND) to the Transfer Agent, elect to
have subsequent dividends or both dividends and capital gains distributions
paid in cash, rather than reinvested, in which event payment will be mailed
monthly. Cash payments can
 
                                       34
<PAGE>
 
also be directly deposited to the shareholder's bank account. No CDSC will be
imposed upon redemption of shares issued as a result of the automatic
reinvestment of dividends or capital gains distributions.
   
  Systematic Withdrawal Plans. A Class A or Class D shareholder may elect to
receive systematic withdrawal payments from his or her Investment Account
through automatic payment by check or through automatic payment by direct
deposit to his or her bank account on either a monthly or quarterly basis.
Alternatively, a Class A or Class D shareholder whose shares are held within a
CMA(R) or CBA(R) account may elect to have shares redeemed on a monthly,
bimonthly, quarterly, semiannual or annual basis through the CMA(R) or CBA(R)
Systematic Redemption Program, subject to certain conditions.     
   
  Automatic Investment Plans. Regular additions of Class A, Class B, Class C
and Class D shares may be made to an investor's Investment Account by
prearranged charges of $50 or more to his or her regular bank account.
Alternatively, investors who maintain CMA(R) or CBA(R) accounts may arrange to
have periodic investments made in the Fund in their CMA(R) or CBA(R) account or
in certain related accounts in amounts of $100 or more through the CMA(R) or
CBA(R) Automated Investment Program.     
          
  Fee-Based Programs. Certain Merrill Lynch fee-based programs, including
pricing alternatives for securities transactions, (each referred to in this
paragraph as a "Program") may permit the purchase of Class A shares at net
asset value. Under specified circumstances, participants in certain Programs
may deposit other classes of shares which will be exchanged for Class A shares.
Initial or deferred sales charges otherwise due in connection with such
exchanges may be waived or modified, as may the Conversion Period applicable to
the deposited shares. Termination of participation in a Program may result in
the redemption of shares held therein or the automatic exchange thereof to
another class at net asset value, which may be shares of a money market fund.
In addition, upon termination of participation in a Program, shares that have
been held for less than specified periods within such Program may be subject to
a fee based upon the current value of such shares. These Programs also
generally prohibit such shares from being transferred to another account at
Merrill Lynch, to another broker-dealer or to the Transfer Agent. Except in
limited circumstances (which may also involve an exchange as described above),
such shares must be redeemed and another class of shares purchased (which may
involve the imposition of initial or deferred sales charges and distribution
and account maintenance fees) in order for the investment not to be subject to
Program fees. Additional information regarding a specific Program (including
charges and limitations on transferability applicable to shares that may be
held in such Program) is available in such Program's client agreement and from
Merrill Lynch Investor Services at (800) MER-FUND (637-3863).     
 
                             PORTFOLIO TRANSACTIONS
 
  The Trust has no obligation to deal with any dealer or group of dealers in
the execution of transactions in portfolio securities of the Fund. Municipal
Bonds and other securities in which the Fund invests are traded primarily in
the over-the-counter market. Where possible, the Trust deals directly with the
dealers who make a market in the securities involved except in those
circumstances where better prices and execution are available elsewhere. It is
the policy of the Trust to obtain the best net results in conducting portfolio
transactions for the Fund, taking into account such factors as price (including
the applicable dealer spread), the size, type and difficulty of the
transactions involved, the firm's general execution and operations facilities,
 
                                       35
<PAGE>
 
and the firm's risk in positioning the securities involved and the provision of
supplemental investment research by the firm. While reasonably competitive
spreads or commissions are sought, the Fund will not necessarily be paying the
lowest spread or commission available. The sale of shares of the Fund may be
taken into consideration as a factor in the selection of brokers or dealers to
execute portfolio transactions for the Fund. The portfolio securities of the
Fund generally are traded on a net basis and normally do not involve either
brokerage commissions or transfer taxes. The cost of portfolio securities
transactions of the Fund primarily consists of dealer or underwriter spreads.
Under the 1940 Act, persons affiliated with the Trust, including Merrill Lynch,
are prohibited from dealing with the Trust as a principal in the purchase and
sale of securities unless such trading is permitted by an exemptive order
issued by the Commission. The Trust has obtained an exemptive order permitting
it to engage in certain principal transactions with Merrill Lynch involving
high quality short-term municipal bonds subject to certain conditions. In
addition, the Trust may not purchase securities, including Municipal Bonds, for
the Fund during the existence of any underwriting syndicate of which Merrill
Lynch is a member except pursuant to procedures approved by the Trustees of the
Trust which comply with rules adopted by the Commission. The Trust has applied
for an exemptive order permitting it to, among other things, (i) purchase high
quality tax-exempt securities from Merrill Lynch when Merrill Lynch is a member
of an underwriting syndicate and (ii) purchase tax-exempt securities from and
sell tax-exempt securities to Merrill Lynch in secondary market transactions.
Affiliated persons of the Trust may serve as its broker in over-the-counter
transactions conducted for the Fund on an agency basis only.
 
                            DISTRIBUTIONS AND TAXES
 
DISTRIBUTIONS
   
  The net investment income of the Fund is declared as dividends daily, prior
to the determination of the net asset value which is calculated 15 minutes
after the close of business on the NYSE (generally 4:00 P.M., New York time) on
that day. The net investment income of the Fund for dividend purposes consists
of interest earned on portfolio securities, less expenses, in each case
computed since the most recent determination of the net asset value. Expenses
of the Fund, including the management fees and the account maintenance and
distribution fees, are accrued daily. Dividends of net investment income are
declared daily and reinvested monthly in the form of additional full and
fractional shares of the Fund at net asset value as of the close of business on
the "payment date" unless the shareholder elects to receive such dividends in
cash. Shares will accrue dividends as long as they are issued and outstanding.
Shares are issued and outstanding from the settlement date of a purchase order
to the day prior to settlement date of a redemption order.     
 
  All net realized long-term or short-term capital gains, if any, are declared
and distributed to the Fund's shareholders annually. Capital gains
distributions will be reinvested automatically in shares unless the shareholder
elects to receive such distributions in cash.
 
  The per share dividends and distributions on each class of shares will be
reduced as a result of any account maintenance, distribution and transfer
agency fees applicable with respect to that class. See "Additional
Information--Determination of Net Asset Value".
 
  See "Shareholder Services" for information as to how to elect either dividend
reinvestment or cash payments. Portions of dividends and distributions which
are taxable to shareholders as described below are subject to income tax
whether they are reinvested in shares of the Fund or received in cash.
 
                                       36
<PAGE>
 
TAXES
   
  The Trust intends to continue to qualify the Fund for the special tax
treatment afforded regulated investment companies ("RICs") under the Code. If
it so qualifies, the Fund (but not its shareholders) will not be subject to
Federal income tax to the extent that it distributes its net investment income
and net realized capital gains. The Trust intends to cause the Fund to
distribute substantially all of such income.     
 
  To the extent that the dividends distributed to the Fund's Class A, Class B,
Class C and Class D shareholders (together, the "shareholders") are derived
from interest income exempt from Federal tax under Code Section 103(a) and are
properly designated as "exempt-interest dividends" by the Trust, they will be
excludable from a shareholder's gross income for Federal income tax purposes.
Exempt-interest dividends are included, however, in determining the portion, if
any, of a person's social security and railroad retirement benefits subject to
Federal income and Minnesota personal income taxes. The portion of such exempt-
interest dividends that is derived from interest income on Minnesota Municipal
Bonds is excluded from the Minnesota taxable net income of individuals, estates
and trusts, provided that the portion of the exempt-interest dividends from
such Minnesota Municipal Bonds paid to all shareholders represents 95% or more
of the exempt-interest dividends paid by the Fund. Also excluded from the
Minnesota taxable net income of individuals, estates and trusts are dividends
that are directly attributable to interest on obligations of the Government of
Puerto Rico, the Territory of Guam and certain other territories and
possessions of the United States. Shareholders subject to income taxation by
states other than Minnesota will realize a lower after-tax rate of return than
Minnesota shareholders since the dividends distributed by the Fund generally
will not be exempt, to any significant degree, from income taxation by such
other states. The Trust will inform shareholders annually as to the portion of
the Fund's distributions which constitutes exempt-interest dividends and the
portion which is exempt from Minnesota personal income taxes. Interest on
indebtedness incurred or continued to purchase or carry Fund shares is not
deductible for Federal income or Minnesota personal income tax purposes.
Persons who may be "substantial users" (or "related persons" of substantial
users) of facilities financed by industrial development bonds or private
activity bonds held by the Fund should consult their tax advisers before
purchasing Fund shares.
 
  Exempt-interest dividends are not excluded from the Minnesota taxable income
of corporations and financial institutions.
 
  The 1995 Minnesota Legislature has enacted a statement of intent that
interest on obligations of Minnesota governmental units and Indian tribes be
included in net income of individuals, estates and trusts for Minnesota income
tax purposes if a court determines that Minnesota's exemption of such interest
unlawfully discriminates against interstate commerce because interest on
obligations of governmental issuers located in other states is so included.
This provision applies to taxable years that begin during or after the calendar
year in which any such court decision becomes final, irrespective of the date
on which the obligations were issued. The Fund is not aware of any judicial
decision holding that a state's exemption of interest on its own bonds or those
of its political subdivisions or Indian tribes, but not of interest on the
bonds of other states or their political subdivisions or Indian tribes,
unlawfully discriminates against interstate commerce or otherwise contravenes
the United States Constitution. Nevertheless, the Fund cannot predict the
likelihood that interest on the Minnesota Bonds held by the Fund would become
taxable under this Minnesota statutory provision.
 
 
                                       37
<PAGE>
 
   
  To the extent that the Fund's distributions are derived from interest on its
taxable investments (including, in the case of Minnesota tax law, interest on
Municipal Bonds of other states) or from an excess of net short-term capital
gains over net long-term capital losses ("ordinary income dividends"), such
distributions are considered ordinary income for Federal and Minnesota income
tax purposes, except, in the case of Minnesota personal income tax, for
dividends that are directly attributable to interest on obligations of the
United States Government. Distributions, if any, from an excess of net long-
term capital gains over net short-term capital losses derived from the sale of
securities or from certain transactions in futures or options ("capital gain
dividends") are taxable as long-term capital gains for Federal income tax
purposes, regardless of the length of time the shareholder has owned Fund
shares. Such capital gain dividends are also subject to Minnesota personal
income and corporate franchise taxes. Distributions by the Fund, whether from
exempt-interest income, ordinary income or capital gains, will not be eligible
for the dividends received deduction allowed to corporations under the Code.
       
  All or a portion of the Fund's gain from the sale or redemption of tax-exempt
obligations purchased at a market discount will be treated as ordinary income
rather than capital gain. This rule may increase the amount of ordinary income
dividends received by shareholders. Distributions in excess of the Fund's
earnings and profits will first reduce the adjusted tax basis of a holder's
shares and, after such adjusted tax basis is reduced to zero, will constitute
capital gains to such holder (assuming the shares are held as a capital asset).
Any loss upon the sale or exchange of Fund shares held for six months or less
will be disallowed for both Federal income and Minnesota personal income and
corporate franchise tax purposes to the extent of any exempt-interest dividends
received by the shareholder, even, in the case of Minnesota taxes, where all or
a portion of such dividends is not excluded from Minnesota taxable income. In
addition, any such loss that is not disallowed under the rule stated above will
be treated as long-term capital loss to the extent of any capital gain
dividends received by the shareholder. If the Fund pays a dividend in January
which was declared in the previous October, November or December to
shareholders of record on a specified date in one of such months, then such
dividend will be treated for tax purposes as being paid by the Fund and
received by its shareholders on December 31 of the year in which such dividend
was declared.     
   
  The Code subjects interest received on certain otherwise tax-exempt
securities to an alternative minimum tax. This alternative minimum tax applies
to interest received on certain "private activity bonds" issued after August 7,
1986. Private activity bonds are bonds which, although tax-exempt, are used for
purposes other than those generally performed by governmental units and which
benefit non-governmental entities (e.g., bonds used for industrial development
or housing purposes). Income received on such bonds is classified as an item of
"tax preference," which could subject certain investors in such bonds,
including shareholders of the Fund, to an alternative minimum tax. The Fund
will purchase such "private activity bonds" and the Trust will report to
shareholders within 60 days after the Fund's taxable year-end the portion of
the Fund's dividends declared during the year which constitutes an item of tax
preference for alternative minimum tax purposes. The Code further provides that
corporations are subject to an alternative minimum tax based, in part, on
certain differences between taxable income as adjusted for other tax
preferences and the corporation's "adjusted current earnings", which more
closely reflect a corporation's economic income. Because an exempt-interest
dividend paid by the Fund will be included in adjusted current earnings, a
corporate shareholder may be required to pay alternative minimum tax on exempt-
interest dividends paid by the Fund. Exempt-interest dividends attributable to
interest on certain private activity bonds issued after August 7, 1986, also
will be included in Minnesota alternative minimum taxable income of
individuals, estates and trusts for purposes of computing Minnesota's
alternative minimum tax.     
 
                                       38
<PAGE>
 
  No gain or loss will be recognized by Class B shareholders on the conversion
of their Class B shares into Class D shares. A shareholder's basis in the Class
D shares acquired will be the same as such shareholder's basis in the Class B
shares converted, and the holding period of the acquired Class D shares will
include the holding period for the converted Class B shares.
 
  If a shareholder exercises an exchange privilege within 90 days of acquiring
the shares, then the loss the shareholder can recognize on the exchange will be
reduced (or the gain increased) to the extent any sales charge paid to the Fund
on the exchanged shares reduces any sales charge the shareholder would have
owed upon purchase of the new shares in the absence of the exchange privilege.
Instead, such sales charge will be treated as an amount paid for the new
shares.
 
  A loss realized on a sale or exchange of shares of the Fund will be
disallowed if other Fund shares are acquired (whether through the automatic
reinvestment of dividends or otherwise) within a 61-day period beginning 30
days before and ending 30 days after the date that the shares are disposed of.
In such a case, the basis of the shares acquired will be adjusted to reflect
the disallowed loss.
 
  Under certain provisions of the Code, some shareholders may be subject to a
31% withholding tax on certain ordinary income dividends and on capital gain
dividends and redemption payments ("backup withholding"). Generally,
shareholders subject to backup withholding will be those for whom no certified
taxpayer identification number is on file with the Trust or who, to the Trust's
knowledge, have furnished an incorrect number. When establishing an account, an
investor must certify under penalty of perjury that such number is correct and
that such investor is not otherwise subject to backup withholding.
 
  The Code provides that every person required to file a tax return must
include for information purposes on such return the amount of exempt-interest
dividends received from all sources (including the Fund) during the taxable
year.
 
  The foregoing is a general and abbreviated summary of the applicable
provisions of the Code, Treasury regulations and Minnesota tax laws presently
in effect. For the complete provisions, reference should be made to the
pertinent Code sections, the Treasury regulations promulgated thereunder and
the applicable Minnesota tax laws. The Code and the Treasury regulations, as
well as the Minnesota tax laws, are subject to change by legislative, judicial
or administrative action either prospectively or retroactively.
   
  Shareholders are urged to consult their tax advisors regarding the
availability of any exemptions from state or local taxes (other than those
imposed by Minnesota) and with specific questions as to Federal, foreign, state
or local taxes.     
 
                                       39
<PAGE>
 
                                PERFORMANCE DATA
 
  From time to time the Fund may include its average annual total return, yield
and tax-equivalent yield for various specified time periods in advertisements
or information furnished to present or prospective shareholders. Average annual
total return, yield and tax-equivalent yield are computed separately for
Class A, Class B, Class C and Class D shares in accordance with formulas
specified by the Commission.
 
  Average annual total return quotations for the specified periods will be
computed by finding the average annual compounded rates of return (based on net
investment income and any realized and unrealized capital gains or losses on
portfolio investments over such periods) that would equate the initial amount
invested to the redeemable value of such investment at the end of each period.
Average annual total return will be computed assuming all dividends and
distributions are reinvested and taking into account all applicable recurring
and nonrecurring expenses, including any CDSC that would be applicable to a
complete redemption of the investment at the end of the specified period such
as in the case of Class B and Class C shares and the maximum sales charge in
the case of Class A and Class D shares. Dividends paid by the Fund with respect
to all shares, to the extent any dividends are paid, will be calculated in the
same manner at the same time on the same day and will be in the same amount,
except that account maintenance fees and distribution charges and any
incremental transfer agency costs relating to each class of shares will be
borne exclusively by that class. The Fund will include performance data for all
classes of shares of the Fund in any advertisement or information including
performance data of the Fund.
 
  The Fund also may quote total return and aggregate total return performance
data for various specified time periods. Such data will be calculated
substantially as described above, except that (1) the rates of return
calculated will not be average annual rates, but rather, actual annual,
annualized or aggregate rates of return, and (2) the maximum applicable sales
charges will not be included with respect to annual or annualized rates of
return calculations. Aside from the impact on the performance data calculations
of including or excluding the maximum applicable sales charges, actual annual
or annualized total return data generally will be lower than average annual
total return data since the average annual rates of return reflect compounding;
aggregate total return data generally will be higher than average annual total
return data since the aggregate rates of return reflect compounding over a
longer period of time. In advertisements distributed to investors whose
purchases are subject to waiver of the CDSC in the case of Class B and Class C
shares, or to reduced sales charges in the case of Class A or Class D shares,
the performance data may take into account the reduced, and not the maximum,
sales charge or may not take into account the CDSC and therefore may reflect
greater total return since, due to the reduced sales charges or waiver of the
CDSC, a lower amount of expenses is deducted. See "Purchase of Shares". The
Fund's total return may be expressed either as a percentage or as a dollar
amount in order to illustrate such total return on a hypothetical $1,000
investment in the Fund at the beginning of each specified period.
   
  Yield quotations will be computed based on a 30-day period by dividing (a)
the net income based on the yield of each security earned during the period by
(b) the average daily number of shares outstanding during the period that were
entitled to receive dividends multiplied by the maximum offering price per
share on the last day of the period. Tax equivalent yield quotations will be
computed by dividing (a) the part of the Fund's yield that is tax-exempt by (b)
one minus a stated tax rate and (c) adding the result to that part, if any, of
the Fund's yield that is not tax-exempt. The yield for the 30-day period ended
July 31, 1996 was 4.50% for Class A shares, 4.18% for Class B shares, 4.08% for
Class C shares and 4.41% for Class D shares and the     
 
                                       40
<PAGE>
 
   
tax-equivalent yield for the same period (based on a Federal income tax rate of
28%) was 6.25% for Class A shares, 5.81% for Class B shares, 5.67% for Class C
shares and 6.13% for Class D shares.     
 
  Total return, yield and tax-equivalent yield figures are based on the Fund's
historical performance and are not intended to indicate future performance. The
Fund's total return, yield and tax-equivalent yield will vary depending on
market conditions, the securities comprising the Fund's portfolio, the Fund's
operating expenses and the amount of realized and unrealized net capital gains
or losses during the period. The value of an investment in the Fund will
fluctuate and an investor's shares, when redeemed, may be worth more or less
than their original cost.
 
  On occasion, the Fund may compare its performance to performance data
published by Lipper Analytical Services, Inc., Morningstar Publications, Inc.
("Morningstar"), and CDA Investment Technology, Inc. or to data contained in
publications such as Money Magazine, U.S. News & World Report, Business Week,
Forbes Magazine and Fortune Magazine. From time to time, the Fund may include
the Fund's Morningstar risk-adjusted performance ratings in advertisements or
supplemental sales literature. As with other performance data, performance
comparisons should not be considered indicative of the Fund's relative
performance for any future period.
 
                             ADDITIONAL INFORMATION
 
DETERMINATION OF NET ASSET VALUE
   
  The net asset value of the shares of all classes of the Fund is determined by
the Manager once daily 15 minutes after the close of business on the NYSE
(generally, 4:00 p.m., New York time), on each day during which the NYSE is
open for trading. The net asset value per share is computed by dividing the sum
of the value of the securities held by the Fund plus any cash or other assets
minus all liabilities by the total number of shares outstanding at such time,
rounded to the nearest cent. Expenses, including the fees payable to the
Manager and the Distributor, are accrued daily.     
   
  The per share net asset value of Class A shares generally will be higher than
the per share net asset value of shares of the other classes, reflecting the
daily expense accruals of the account maintenance, distribution and higher
transfer agency fees applicable with respect to Class B and Class C shares and
the daily expense accruals of the account maintenance fees applicable with
respect to Class D shares; moreover, the per share net asset value of Class D
shares generally will be higher than the per share net asset value of Class B
and Class C shares, reflecting the daily expense accruals of the distribution
fees, higher account maintenance fees and higher transfer agency fees
applicable with respect to Class B and Class C shares. It is expected, however,
that the per share net asset value of the classes will tend to converge
(although not necessarily meet) immediately after the payment of dividends or
distributions which will differ by approximately the amount of the expense
accrual differentials between the classes.     
 
ORGANIZATION OF THE TRUST
 
  The Trust is an unincorporated business trust organized on August 2, 1985
under the laws of Massachusetts. On October 1, 1987, the Trust changed its name
from "Merrill Lynch Multi-State Tax-Exempt Series Trust" to "Merrill Lynch
Multi-State Municipal Bond Series Trust", and on December 22,
 
                                       41
<PAGE>
 
   
1987, the Trust changed its name to "Merrill Lynch Multi-State Municipal Series
Trust". The Trust is an open-end management investment company comprised of
separate series ("Series"), each of which is a separate portfolio offering
shares to selected groups of purchasers. Each of the Series is to be managed
independently in order to provide to shareholders who are residents of the
state to which such Series relates as high a level of income exempt from
Federal and, in certain cases, state and local income taxes as is consistent
with prudent investment management. The Trustees are authorized to create an
unlimited number of Series and, with respect to each Series, to issue an
unlimited number of full and fractional shares of beneficial interest of $.10
par value of different classes. Shareholder approval is not required for the
authorization of additional Series or classes of a Series of the Trust. At the
date of this Prospectus, the shares of the Fund are divided into Class A, Class
B, Class C and Class D shares. Class A, Class B, Class C and Class D shares
represent interests in the same assets of the Fund and are identical in all
respects except that Class B, Class C and Class D shares bear certain expenses
related to the account maintenance associated with such shares, and Class B and
Class C shares bear certain expenses related to the distribution of such
shares. Each class has exclusive voting rights with respect to matters relating
to account maintenance and distribution expenditures as applicable. See
"Purchase of Shares". The Trustees of the Trust may classify and reclassify the
shares of any Series into additional classes at a future date.     
 
  Shareholders are entitled to one vote for each full share and to fractional
votes for fractional shares held in the election of Trustees (to the extent
hereinafter provided) and on other matters submitted to the vote of
shareholders. There normally will be no meeting of shareholders for the purpose
of electing Trustees unless and until such time as less than a majority of the
Trustees holding office have been elected by shareholders, at which time the
Trustees then in office will call a shareholders' meeting for the election of
Trustees. Shareholders may, in accordance with the terms of the Declaration of
Trust, cause a meeting of shareholders to be held for the purpose of voting on
the removal of Trustees. Also, the Trust will be required to call a special
meeting of shareholders of a Series in accordance with the requirements of the
1940 Act to seek approval of new management and advisory arrangements, of a
material increase in distribution fees or of a change in the fundamental
policies, objectives or restrictions of a Series. Except as set forth above,
the Trustees shall continue to hold office and appoint successor Trustees. Each
issued and outstanding share is entitled to participate equally in dividends
and distributions declared by the respective Series and in net assets of such
Series upon liquidation or dissolution remaining after satisfaction of
outstanding liabilities except that, as noted above, Class B, Class C and Class
D shares bear certain additional expenses. The obligations and liabilities of a
particular Series are restricted to the assets of that Series and do not extend
to the assets of the Trust generally. The shares of each Series, when issued,
will be fully-paid and non-assessable by the Trust.
 
SHAREHOLDER REPORTS
 
  Only one copy of each shareholder report and certain shareholder
communications will be mailed to each identified shareholder regardless of the
number of accounts such shareholder has. If a shareholder wishes to receive
separate copies of each report and communication for each of the shareholder's
related accounts, the shareholder should notify in writing:
 
    Merrill Lynch Financial Data Services, Inc.
    P.O. Box 45289
    Jacksonville, Florida 32232-5289
 
                                       42
<PAGE>
 
   
The written notification should include the shareholder's name, address, tax
identification number and Merrill Lynch, Pierce, Fenner & Smith Incorporated
and/or mutual fund account numbers. If you have any questions regarding this
matter, please call your Merrill Lynch Financial Consultant or Merrill Lynch
Financial Data Services, Inc. at 800-637-3863.     
 
SHAREHOLDER INQUIRIES
 
  Shareholder inquiries may be addressed to the Trust at the address or
telephone number set forth on the cover page of this Prospectus.
 
                               ----------------
 
  The Declaration of Trust establishing the Trust, dated August 2, 1985, a copy
of which together with all amendments thereto (the "Declaration"), is on file
in the office of the Secretary of the Commonwealth of Massachusetts, provides
that the name "Merrill Lynch Multi-State Municipal Series Trust" refers to the
Trustees under the Declaration collectively as Trustees, but not as individuals
or personally; and no Trustee, shareholder, officer, employee or agent of the
Trust shall be held to any personal liability, nor shall resort be had to such
person's private property for the satisfaction of any obligation or claim of
the Trust, but the "Trust Property" only shall be liable.
 
                                       43
<PAGE>
 
                      
                   [This page intentionally left blank.]     
 
                                       44
<PAGE>
 
  MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND -- AUTHORIZATION FORM (PART 1)
- -------------------------------------------------------------------------------
1. SHARE PURCHASE APPLICATION
  I, being of legal age, wish to purchase: (choose one)
 [_] Class A shares  [_] Class B shares  [_] Class C shares  [_] Class D shares
 
of Merrill Lynch Minnesota Municipal Bond Fund and establish an Investment
Account as described in the Prospectus. In the event that I am not eligible to
purchase Class A shares, I understand that Class D shares will be purchased.
 
  Basis for establishing an Investment Account:
    A. I enclose a check for $............ payable to Merrill Lynch Financial
  Data Services, Inc., as an initial investment (minimum $1,000). I understand
  that this purchase will be executed at the applicable offering price next to
  be determined after this Application is received by you.
    B. I already own shares of the following Merrill Lynch mutual funds that
  would qualify for the right of accumulation as outlined in the Statement of
  Additional Information: (Please list all funds. Use a separate sheet of
  paper if necessary.)
1. ..................................    4. ..................................
2. ..................................    5. ..................................
3. ..................................    6. ..................................
Name...........................................................................
  First Name                        Initial                        Last Name
Name of Co-Owner (if any)......................................................
                First Name                 Initial                 Last Name
Address........................................................................
 ................................................. Date........................
                                     (Zip Code)
Occupation...........................    Name and Address of Employer ........
                                         .....................................
                                         .....................................
 .....................................    .....................................
         Signature of Owner                 Signature of Co-Owner (if any)
(In the case of co-owner, a joint tenancy with right of survivorship will be
presumed unless otherwise specified.)
- -------------------------------------------------------------------------------
2. DIVIDEND AND CAPITAL GAIN DISTRIBUTION OPTIONS
 
                                         
     Ordinary Income Dividends            Long-Term Capital Gains 
      SELECT                              SELECT               
      ONE:                                ONE:          
              [_] Reinvest                       [_] Reinvest    
              [_] Cash                           [_] Cash       
    
    
 
If no election is made, dividends and capital gains will be automatically
reinvested at net asset value without a sales charge.
IF CASH, SPECIFY HOW YOU WOULD LIKE YOUR DISTRIBUTIONS PAID TO YOU: [_] Check
or [_] Direct Deposit to bank account
IF DIRECT DEPOSIT TO BANK ACCOUNT IS SELECTED, PLEASE COMPLETE BELOW:
I hereby authorize payment of dividend and capital gain distributions by
direct deposit to my bank account and, if necessary, debit entries and
adjustments for any credit entries made to my account in accordance with the
terms I have selected on the Merrill Lynch Minnesota Municipal Bond Fund
Authorization Form.
 
Specify type of account (check one): [_] checking  [_] savings
 
Name on your account ..........................................................
 
Bank Name .....................................................................
 
Bank Number ...................... Account Number ............................
 
Bank Address ..................................................................
 
I AGREE THAT THIS AUTHORIZATION WILL REMAIN IN EFFECT UNTIL I PROVIDE WRITTEN
NOTIFICATION TO MERRILL LYNCH FINANCIAL DATA SERVICES, INC. AMENDING OR
TERMINATING THIS SERVICE.
 
Signature of Depositor ........................................................
 
Signature of Depositor ............................... Date...................
(if joint account, both must sign)
NOTE: IF DIRECT DEPOSIT TO BANK ACCOUNT IS SELECTED, YOUR BLANK, UNSIGNED
CHECK MARKED "VOID" OR A DEPOSIT SLIP FROM YOUR SAVINGS ACCOUNT SHOULD
ACCOMPANY THIS APPLICATION.
 
                                      45
<PAGE>
 
 MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND -- AUTHORIZATION FORM (PART 1) --
                                  (CONTINUED)
- -------------------------------------------------------------------------------
3. SOCIAL SECURITY NUMBER OR TAXPAYER IDENTIFICATION NUMBER
 
           [                                                       ]
           Social Security Number or Taxpayer Identification Number
 
  Under penalty of perjury, I certify (1) that the number set forth above is
my correct Social Security Number or Taxpayer Identification Number and (2)
that I am not subject to backup withholding (as discussed in the Prospectus
under "Distributions and Taxes -- Taxes") either because I have not been
notified that I am subject thereto as a result of a failure to report all
interest or dividends, or the Internal Revenue Service ("IRS") has notified me
that I am no longer subject thereto.
 
  INSTRUCTION: YOU MUST STRIKE OUT THE LANGUAGE IN (2) ABOVE IF YOU HAVE BEEN
NOTIFIED THAT YOU ARE SUBJECT TO BACKUP WITHHOLDING DUE TO UNDERREPORTING AND
IF YOU HAVE NOT RECEIVED A NOTICE FROM THE IRS THAT BACKUP WITHHOLDING HAS
BEEN TERMINATED. THE UNDERSIGNED AUTHORIZES THE FURNISHING OF THIS
CERTIFICATION TO OTHER MERRILL LYNCH SPONSORED MUTUAL FUNDS.
 
 .....................................    .....................................
         Signature of Owner                 Signature of Co-Owner (if any)
- -------------------------------------------------------------------------------
4. LETTER OF INTENTION--CLASS A AND CLASS D SHARES ONLY (SEE TERMS AND
CONDITIONS IN THE STATEMENT OF ADDITIONAL INFORMATION)
 
                                                 ..................., 19......
Dear Sir/Madam:                                    Date of initial purchase
 
  Although I am not obligated to do so, I intend to purchase shares of Merrill
Lynch Minnesota Municipal Bond Fund or any other investment company with an
initial sales charge or deferred sales charge for which Merrill Lynch Funds
Distributor, Inc. acts as distributor over the next 13-month period which will
equal or exceed:
 
 [_] $25,000    [_] $50,000    [_] $100,000    [_] $250,000    [_] $1,000,000
  Each purchase will be made at the then reduced offering price applicable to
the amount checked above, as described in the Merrill Lynch Minnesota
Municipal Bond Fund Prospectus.
 
  I agree to the terms and conditions of the Letter of Intention. I hereby
irrevocably constitute and appoint Merrill Lynch Funds Distributor, Inc., my
attorney, with full power of substitution, to surrender for redemption any or
all shares of Merrill Lynch Minnesota Municipal Bond Fund held as security.
 
By ..................................    .....................................
        Signature of Owner                       Signature of Co-Owner
                                 (if registered in joint names, both must sign)
  In making purchases under this letter, the following are the related
accounts on which reduced offering prices are to apply:
 
(1) Name.............................    (2) Name.............................
                                         
Account Number.......................    Account Number.......................
- -------------------------------------------------------------------------------
 
5. FOR DEALER ONLY
    Branch Office, Address, Stamp           
- -                                  -     We hereby authorize Merrill Lynch
                                         Funds Distributor, Inc. to act as
                                         our agent in connection with
                                         transactions under this
                                         authorization form and agree to
                                         notify the Distributor of any
                                         purchases or sales made under a
                                         Letter of Intention, Automatic
                                         Investment Plan or Systematic
                                         Withdrawal Plan. We guarantee the
                                         shareholder's signature.     
 
- -                                  -
This form, when completed, should
be mailed to:
 
  Merrill Lynch Minnesota Municipal 
    Bond Fund
  c/o Merrill Lynch Financial Data 
    Services, Inc.
                                         .....................................
  P.O. Box 45289                                Dealer Name and Address
                                                               
  Jacksonville, FL 32232-5289                                  
                                         [_][_][_]   [_][_][_][_] ..............
                                         Branch Code F/C No.      F/C Last Name 
                                                
                                         By: .................................
                                            Authorized Signature of Dealer

                                         [_][_][_] [_][_][_][_][_]
                                          Dealer's Customer A/C No.
                                         
 
                                      46
<PAGE>
 
  MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND -- AUTHORIZATION FORM (PART 2)
- -------------------------------------------------------------------------------
 
NOTE: THIS FORM IS REQUIRED TO APPLY FOR THE SYSTEMATIC WITHDRAWAL OR
AUTOMATIC INVESTMENT PLANS ONLY.
- -------------------------------------------------------------------------------
 
1. ACCOUNT REGISTRATION
 
(Please Print)
                                                    [                       ] 
Name of Owner..................................     Social Security Number or
                                                     Taxpayer Identification
                                                             Number
 
Name of Co-Owner (if any)......................
 
Address........................................    Account Number ............
                                                   (if existing account)
 ...............................................
- -------------------------------------------------------------------------------
 
2. SYSTEMATIC WITHDRAWAL PLAN--CLASS A AND D SHARES ONLY (SEE TERMS AND
CONDITIONS IN THE STATEMENT OF ADDITIONAL INFORMATION)
 
MINIMUM REQUIREMENTS: $10,000 for monthly disbursements, $5,000 for quarterly,
of [_] Class A or [_] Class D shares in Merrill Lynch Minnesota Municipal Bond
Fund at cost or current offering price. Withdrawals to be made either (check
one) [_] Monthly on the 24th day of each month, or [_] Quarterly on the 24th
day of March, June, September and December. If the 24th falls on a weekend or
holiday, the next succeeding business day will be utilized. Begin systematic
withdrawal on                     or as soon as possible thereafter.
                                        (month)
 
SPECIFY HOW YOU WOULD LIKE YOUR WITHDRAWAL PAID TO YOU (CHECK ONE): [_] $______
or [_] _____% of the current value of [_] Class A or [_] Class D shares in the
account.
 
SPECIFY WITHDRAWAL METHOD: [_] check or [_] direct deposit to bank account
(check one and complete part (a) or (b) below):
 
DRAW CHECKS PAYABLE (CHECK ONE)
 
(a)I hereby authorize payment by check
  [_] as indicated in Item 1.
  [_] to the order of..........................................................
 
Mail to (check one)
  [_] the address indicated in Item 1.
  [_] Name (Please Print)......................................................
 
Address .......................................................................
 
   ..........................................................................
 
   Signature of Owner................................   Date..................
 
   Signature of Co-Owner (if any)............................................
 
(B) I HEREBY AUTHORIZE PAYMENT BY DIRECT DEPOSIT TO MY BANK ACCOUNT AND, IF
NECESSARY, DEBIT ENTRIES AND ADJUSTMENTS FOR ANY CREDIT ENTRIES MADE TO MY
ACCOUNT. I AGREE THAT THIS AUTHORIZATION WILL REMAIN IN EFFECT UNTIL I PROVIDE
WRITTEN NOTIFICATION TO MERRILL LYNCH FINANCIAL DATA SERVICES, INC. AMENDING
OR TERMINATING THIS SERVICE.
 
Specify type of account (check one): [_] checking [_] savings
 
Name on your Account...........................................................
 
Bank Name......................................................................
 
Bank Number........................ Account Number............................
 
Bank Address...................................................................
 
     ........................................................................
 
Signature of Depositor................................. Date..................
 
Signature of Depositor.........................................................
(If joint account, both must sign)
 
NOTE: IF DIRECT DEPOSIT IS ELECTED, YOUR BLANK, UNSIGNED CHECK MARKED "VOID"
OR A DEPOSIT SLIP FROM YOUR SAVINGS ACCOUNT SHOULD ACCOMPANY THIS APPLICATION.
 
                                      47
<PAGE>
 
 MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND -- AUTHORIZATION FORM (PART 2) --
                                  (CONTINUED)
- -------------------------------------------------------------------------------
 
3. APPLICATION FOR AUTOMATIC INVESTMENT PLAN
 
  I hereby request that Merrill Lynch Financial Data Services, Inc. draw an
automated clearing house ("ACH") debit on my checking account as described
below each month to purchase: (choose one)
 
[_] Class A shares   [_] Class B shares   [_] Class C shares  [_] Class D shares
 
of Merrill Lynch Minnesota Municipal Bond Fund subject to the terms set forth
below. In the event that I am not eligible to purchase Class A shares, I
understand that Class D shares will be purchased.
 
                                           AUTHORIZATION TO HONOR ACH DEBITS
    MERRILL LYNCH FINANCIAL DATA
           SERVICES, INC.
 
                                           DRAWN BY MERRILL LYNCH FINANCIAL
You are hereby authorized to draw an              DATA SERVICES, INC.
ACH debit each month on my bank
account for investment in Merrill
Lynch Minnesota Municipal Bond Fund,
as indicated below:
 
                                         To...............................Bank
                                                       (Investor's Bank)
 
 Amount of each ACH debit $........      Bank Address.........................
                                     
 
 Account Number....................      City...... State...... Zip Code......
 
 
Please date and invest ACH debits on     As a convenience to me, I hereby
the 20th of each month                   request and authorize you to pay and
beginning     or as soon thereafter      charge to my account ACH debits
as possible.                             drawn on my account by and payable
     (Month)                             to Merrill Lynch Financial Data
  I agree that you are drawing these     Services, Inc. I agree that your
ACH debits voluntarily at my request     rights in respect to each such debit
and that you shall not be liable for     shall be the same as if it were a
any loss arising from any delay in       check drawn on you and signed
preparing or failure to prepare any      personally by me. This authority is
such debit. If I change banks or         to remain in effect until revoked
desire to terminate or suspend this      personally by me in writing. Until
program, I agree to notify you           you receive such notice, you shall
promptly in writing. I hereby            be fully protected in honoring any
authorize you to take any action to      such debit. I further agree that if
correct erroneous ACH debits of my       any such debit be dishonored,
bank account or purchases of Fund        whether with or without cause and
shares including liquidating shares      whether intentionally or
of the Fund and crediting my bank        inadvertently, you shall be under no
account. I further agree that if a       liability.
check or debit is not honored upon      
presentation, Merrill Lynch Financial    ............   .....................
Data Services, Inc. is authorized to        Date           Signature of
discontinue immediately the Automatic                        Depositor
Investment Plan and to liquidate        
sufficient shares held in my account     ............   .....................
to offset the purchase made with the        Bank      Signature of Depositor
dishonored debit.                          Account       (If joint account,
                                            Number         both must sign)
 ............    .....................
    Date            Signature of
                      Depositor
 
                ......................
               Signature of Depositor
                 (If joint account,
                   both must sign)
 
NOTE: IF AUTOMATIC INVESTMENT PLAN IS ELECTED, YOUR BLANK, UNSIGNED CHECK
MARKED "VOID" SHOULD ACCOMPANY THIS APPLICATION.
 
                                      48
<PAGE>
 
                      
                   [This page intentionally left blank.]     
 
                                       49
<PAGE>
 
                      
                   [This page intentionally left blank.]     
 
                                       50
<PAGE>
 
                                    MANAGER
 
                             Fund Asset Management
 
                            Administrative Offices:
                             800 Scudders Mill Road
                             Plainsboro, New Jersey
 
                                Mailing Address:
                                 P.O. Box 9011
                        Princeton, New Jersey 08543-9011
                                  DISTRIBUTOR
 
                     Merrill Lynch Funds Distributor, Inc.
 
                            Administrative Offices:
                             800 Scudders Mill Road
                             Plainsboro, New Jersey
 
                                Mailing Address:
                                 P.O. Box 9081
                        Princeton, New Jersey 08543-9081
 
                                   CUSTODIAN
 
                      State Street Bank and Trust Company
                                  P.O. Box 351
                          Boston, Massachusetts 02101
 
                                 TRANSFER AGENT
 
                  Merrill Lynch Financial Data Services, Inc.
 
                            Administrative Offices:
                           4800 Deer Lake Drive East
                        Jacksonville, Florida 32246-6484
 
                                Mailing Address:
                                 P.O. Box 45289
                        Jacksonville, Florida 32232-5289
                              INDEPENDENT AUDITORS
 
                             Deloitte & Touche LLP
                                117 Campus Drive
                        Princeton, New Jersey 08540-6400
                                    COUNSEL
                                
                             Brown & Wood LLP     
                             One World Trade Center
                         New York, New York 10048-0557
<PAGE>
 
 NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS, OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, IN CONNECTION
WITH THE OFFER CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH OTHER
INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED BY THE TRUST, THE MANAGER OR THE DISTRIBUTOR. THIS PROSPECTUS DOES
NOT CONSTITUTE AN OFFERING IN ANY STATE IN WHICH SUCH OFFERING MAY NOT LAWFULLY
BE MADE.
 
                              -------------------
 
                               TABLE OF CONTENTS
 
<TABLE>   
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Fee Table..................................................................   2
Merrill Lynch Select PricingSM System......................................   4
Financial Highlights.......................................................   8
Investment Objective and Policies..........................................  10
 Potential Benefits........................................................  12
 Special and Risk Considerations Relating to Municipal Bonds...............  13
 Description of Municipal Bonds............................................  13
 When-Issued Securities and Delayed Delivery Transactions..................  16
 Call Rights...............................................................  16
 Financial Futures Transactions and Options................................  16
 Repurchase Agreements.....................................................  18
 Investment Restrictions...................................................  19
Management of the Trust....................................................  20
 Trustees..................................................................  20
 Management and Advisory Arrangements......................................  21
 Code of Ethics............................................................  21
 Transfer Agency Services..................................................  22
Purchase of Shares.........................................................  22
 Initial Sales Charge Alternatives
  --Class A and Class D Shares.............................................  24
 Deferred Sales Charge Alternatives
  --Class B and Class C Shares.............................................  26
 Distribution Plans........................................................  29
 Limitations on the Payment of Deferred Sales Charges......................  30
Redemption of Shares.......................................................  31
 Redemption................................................................  31
 Repurchase................................................................  32
 Reinstatement Privilege--Class A and Class D Shares.......................  32
Shareholder Services.......................................................  33
Portfolio Transactions.....................................................  35
Distributions and Taxes....................................................  36
 Distributions.............................................................  36
 Taxes.....................................................................  37
Performance Data...........................................................  40
Additional Information.....................................................  41
 Determination of Net Asset Value..........................................  41
 Organization of the Trust.................................................  41
 Shareholder Reports.......................................................  42
 Shareholder Inquiries.....................................................  43
Authorization Form.........................................................  45
</TABLE>    
                                                              
                                                           Code #16185-1096     
 
[LOGO] MERRILL LYNCH

Merrill Lynch
Minnesota Municipal 
Bond Fund
Merrill Lynch Multi-State
Municipal Series Trust

[ART]

PROSPECTUS

    October 29, 1996     

Distributor:
Merrill Lynch
Funds Distributor, Inc.

This prospectus should be retained for future reference. 
<PAGE>
 
STATEMENT OF ADDITIONAL INFORMATION
 
                  MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND
               MERRILL LYNCH MULTI-STATE MUNICIPAL SERIES TRUST
  P.O. BOX 9011, PRINCETON, NEW JERSEY 08543-9011 . PHONE NO. (609) 282-2800
 
                               ----------------
 
  Merrill Lynch Minnesota Municipal Bond Fund (the "Fund") is a series of
Merrill Lynch Multi-State Municipal Series Trust (the "Trust"), an open-end
management investment company organized as a Massachusetts business trust. The
investment objective of the Fund is to provide shareholders with as high a
level of income exempt from Federal and Minnesota personal income taxes as is
consistent with prudent investment management. The Fund invests primarily in a
non-diversified portfolio of long-term investment grade obligations of the
State of Minnesota, its political or governmental subdivisions,
municipalities, governmental agencies or instrumentalities, or of Indian
tribal governments of tribes located in Minnesota, the interest on which is
exempt, in the opinion of bond counsel to the issuer, from Federal and
Minnesota personal income taxes. There can be no assurance that the investment
objective of the Fund will be realized.
 
  Pursuant to the Merrill Lynch Select Pricing SM System, the Fund offers four
classes of shares, each with a different combination of sales charges, ongoing
fees and other features. The Merrill Lynch Select Pricing SM System permits an
investor to choose the method of purchasing shares that the investor believes
is most beneficial given the amount of the purchase, the length of time the
investor expects to hold the shares and other relevant circumstances.
 
                               ----------------
   
  The Statement of Additional Information of the Fund is not a prospectus and
should be read in conjunction with the prospectus of the Fund, dated October
29, 1996 (the "Prospectus"), which has been filed with the Securities and
Exchange Commission (the "Commission") and can be obtained, without charge, by
calling or by writing the Fund at the above telephone number or address. This
Statement of Additional Information has been incorporated by reference into
the Prospectus.     
 
                               ----------------
 
                       FUND ASSET MANAGEMENT -- MANAGER
 
             MERRILL LYNCH FUNDS DISTRIBUTOR, INC. -- DISTRIBUTOR
 
                               ----------------
    
 The date of this Statement of Additional Information is October 29, 1996     
<PAGE>
 
                       INVESTMENT OBJECTIVE AND POLICIES
   
  The investment objective of the Fund is to provide shareholders with as high
a level of income exempt from Federal and Minnesota personal income taxes as is
consistent with prudent investment management. The Fund seeks to achieve its
objective by investing primarily in a portfolio of long-term obligations issued
by or on behalf of the State of Minnesota, its political or governmental
subdivisions, municipalities, governmental agencies or instrumentalities, or by
Indian tribal governments of tribes located in Minnesota, which pay interest
exempt from Federal and Minnesota personal income taxes ("Minnesota Municipal
Bonds"). Obligations exempt from Federal income taxes generally are referred to
herein as "Municipal Bonds." Unless otherwise indicated, references to
Municipal Bonds shall be deemed to include Minnesota Municipal Bonds. The Fund
anticipates that at all times, except during temporary defensive periods, it
will maintain at least 65% of its total assets invested in Minnesota Municipal
Bonds. At times, the Fund will seek to hedge its portfolio through the use of
futures transactions to reduce volatility in the net asset value of Fund
shares. Reference is made to "Investment Objective and Policies" in the
Prospectus for a discussion of the investment objective and policies of the
Fund.     
 
  Municipal Bonds may include general obligation bonds of the state and its
political subdivisions, revenue bonds to finance utility systems, highways,
bridges, port and airport facilities, colleges, hospitals, housing facilities,
etc., and industrial development bonds or private activity bonds. The interest
on such obligations may bear a fixed rate or be payable at a variable or
floating rate. The Municipal Bonds purchased by the Fund will be primarily what
are commonly referred to as "investment grade" securities, which are
obligations rated at the time of purchase within the four highest quality
ratings as determined by either Moody's Investors Service, Inc. ("Moody's")
(currently Aaa, Aa, A and Baa), Standard & Poor's Ratings Group ("Standard &
Poor's") (currently AAA, AA, A and BBB) or Fitch Investors Service, Inc.
("Fitch") (currently AAA, AA, A and BBB). If unrated, such securities will
possess creditworthiness comparable, in the opinion of the manager of the Fund,
Fund Asset Management, L.P. (the "Manager"), to other obligations in which the
Fund may invest.
 
  The Fund ordinarily does not intend to realize investment income not exempt
from Federal and Minnesota personal income taxes. However, to the extent that
suitable Minnesota Municipal Bonds are not available for investment by the
Fund, the Fund may purchase Municipal Bonds issued by other states, their
agencies and instrumentalities, the interest income on which is exempt, in the
opinion of bond counsel, from Federal but not Minnesota taxation. In addition,
the Fund may invest in obligations of other qualifying issuers, such as issuers
located in Puerto Rico, the Virgin Islands and Guam which are exempt both from
Federal and Minnesota taxation. The Fund also may invest in securities not
issued by or on behalf of a state or territory or by an agency or
instrumentality thereof if the Fund nevertheless believes such securities to be
exempt from Federal income taxation ("Non-Municipal Tax-Exempt Securities").
Non-Municipal Tax-Exempt Securities could include trust certificates or other
instruments evidencing interests in one or more long-term municipal securities.
Non-Municipal Tax-Exempt Securities also may include securities issued by other
investment companies that invest in municipal bonds, to the extent permitted by
applicable law. Other Non-Municipal Tax-Exempt Securities also could include
trust certificates or other instruments evidencing interests in one or more
Municipal Bonds.
 
  Except when acceptable securities are unavailable as determined by the
Manager, the Fund, under normal circumstances, will invest at least 65% of its
total assets in Minnesota Municipal Bonds. However,
 
                                       2
<PAGE>
 
since at least 95% of the Fund's exempt-interest dividends must be derived from
interest income on obligations of the State of Minnesota, its political or
governmental subdivisions, municipalities, governmental agencies or
instrumentalities, or of Indian tribal governments of tribes located in
Minnesota, in order for such interest income to be excluded from the Minnesota
taxable net income of individuals, estates and trusts, it is anticipated that
substantially all of the Fund's assets will be invested in Minnesota Municipal
Bonds. Dividends from interest on other qualifying issues would not satisfy the
95% test. If for any reason there is not an adequate supply of Minnesota
Municipal Bonds, the Fund may have to hold cash uninvested in order to preserve
the Minnesota tax status of its dividends. For temporary periods or to provide
liquidity, the Fund has the authority to invest as much as 35% of its assets in
tax-exempt or taxable money market obligations with a maturity of one year or
less (such short-term obligations being referred to herein as "Temporary
Investments"), except that taxable Temporary Investments shall not exceed 20%
of the Fund's net assets. The Fund at all times will have at least 80% of its
net assets invested in securities exempt from Federal income taxation. However,
interest received on certain otherwise tax-exempt securities which are
classified as "private activity bonds" (in general, bonds that benefit non-
governmental entities) may be subject to an alternative minimum tax. The Fund
may purchase such private activity bonds. See "Distributions and Taxes". In
addition, the Fund reserves the right to invest temporarily a greater portion
of its assets in Temporary Investments for defensive purposes, when, in the
judgment of the Manager, market conditions warrant. The investment objective of
the Fund set forth in this paragraph is a fundamental policy of the Fund which
may not be changed without a vote of a majority of the outstanding shares of
the Fund. The Fund's hedging strategies are not fundamental policies and may be
modified by the Trustees of the Trust without the approval of the Fund's
shareholders.
 
  Municipal Bonds may at times be purchased or sold on a delayed delivery basis
or a when-issued basis. These transactions arise when securities are purchased
or sold by the Fund with payment and delivery taking place in the future, often
a month or more after the purchase. The payment obligation and the interest
rate are each fixed at the time the buyer enters into the commitment. The Fund
will make only commitments to purchase such securities with the intention of
actually acquiring the securities, but the Fund may sell these securities prior
to the settlement date if it is deemed advisable. Purchasing Municipal Bonds on
a when-issued basis involves the risk that the yields available in the market
when the delivery takes place may actually be higher than those obtained in the
transaction itself; if yields so increase, the value of the when-issued
obligations generally will decrease. The Fund will maintain a separate account
at its custodian bank consisting of cash, cash equivalents or high-grade,
liquid Municipal Bonds or Temporary Investments (valued on a daily basis) equal
at all times to the amount of the when-issued commitment.
 
  The Fund may invest in Municipal Bonds (and Non-Municipal Tax Exempt
Securities) the return on which is based on a particular index of value or
interest rates. For example, the Fund may invest in Municipal Bonds that pay
interest based on an index of Municipal Bond interest rates or based on the
value of gold or some other commodity. The principal amount payable upon
maturity of certain Municipal Bonds also may be based on the value of an index.
Also, the Fund may invest in so-called "inverse floating obligations" or
"residual interest bonds" on which the interest rates typically decline as
market rates increase and increase as market rates decline. To the extent the
Fund invests in these types of Municipal Bonds, the Fund's return on such
Municipal Bonds will be subject to risk with respect to the value of the
particular index, which may include reduced or eliminated interest payments and
losses of invested principal. Such securities have the effect of providing a
degree of investment leverage, since they may increase or decrease in value in
response
 
                                       3
<PAGE>
 
   
to changes, as an illustration, in market interest rates at a rate which is a
multiple (typically two) of the rate at which fixed-rate long-term tax exempt
securities increase or decrease in response to such changes. As a result, the
market values of such securities will generally be more volatile than the
market values of fixed-rate tax exempt securities. To seek to limit the
volatility of these securities, the Fund may purchase inverse floating
obligations with shorter term maturities or which contain limitations on the
extent to which the interest rate may vary. Certain investments in such
obligations may be illiquid. The Fund may not invest in such illiquid
obligations if such investments, together with other illiquid investments,
would exceed 15% of the Fund's total assets. The Manager believes, however,
that indexed and inverse floating obligations represent flexible portfolio
management instruments for the Fund which allow the Fund to seek potential
investment rewards, hedge other portfolio positions or vary the degree of
investment leverage relatively efficiently under different market conditions.
       
  The Fund may purchase a Municipal Bond issuer's right to call all or a
portion of such Municipal Bond for mandatory tender for purchase (a "Call
Right"). A holder of a Call Right may exercise such right to require a
mandatory tender for the purchase of related Municipal Bonds, subject to
certain conditions. A Call Right that is not exercised prior to the maturity of
the related Municipal Bond will expire without value. The economic effect of
holding both the Call Right and the related Municipal Bond is identical to
holding a Municipal Bond as a non-callable security. Certain investments in
such obligations may be illiquid. The Fund may not invest in such illiquid
obligations if such investments, together with other illiquid investments,
would exceed 15% of the Fund's total assets.     
   
  The Fund may invest up to 20% of its total assets in Municipal Bonds which
are rated below Baa by Moody's or below BBB by Standard & Poor's or Fitch or
which, in the Manager's judgment, possess similar credit characteristics ("high
yield securities"). See Appendix II--"Ratings of Municipal Bonds" for
additional information regarding ratings of debt securities. The Manager
considers the ratings assigned by Standard & Poor's, Moody's or Fitch as one of
several factors in its independent credit analysis of issuers.     
   
  High yield securities are considered by Standard & Poor's, Moody's and Fitch
to have varying degrees of speculative characteristics. Consequently, although
high yield securities can be expected to provide higher yields, such securities
may be subject to greater market price fluctuations and risk of loss of
principal than lower yielding, higher rated debt securities. Investments in
high yield securities will be made only when, in the judgment of the Manager,
such securities provide attractive total return potential relative to the risk
of such securities, as compared to higher quality debt securities. The Fund
generally will not invest in debt securities in the lowest rating categories
(those rated CC or lower by Standard & Poor's or Fitch or Ca or lower by
Moody's) unless the Manager believes that the financial condition of the issuer
or the protection afforded the particular securities is stronger than would
otherwise be indicated by such low ratings. The Fund does not intend to
purchase debt securities that are in default or which the Manager believes will
be in default.     
   
  Issuers of high yield securities may be highly leveraged and may not have
available to them more traditional methods of financing. Therefore, the risks
associated with acquiring the securities of such issuers or obligors generally
are greater than is the case with higher rated securities. For example, during
an economic downturn or a sustained period of rising interest rates, issuers of
high yield securities may be more likely to experience financial stress,
especially if such issuers or obligors are highly leveraged. During periods
    
                                       4
<PAGE>
 
   
of economic recession, such issuers may not have sufficient revenues to meet
their interest payment obligations. The issuer's ability to service its debt
obligations also may be adversely affected by specific issuer developments or
the issuer's inability to meet specific projected business forecasts or the
unavailability of additional financing. The risk of loss due to default by the
issuer is significantly greater for the holders of high yield securities
because such securities may be unsecured and may be subordinated to other
creditors of the issuer.     
   
  High yield securities frequently have call or redemption features that would
permit an issuer to repurchase the security from the Fund. If a call were
exercised by the issuer during a period of declining interest rates, the Fund
would likely have to replace such called security with a lower yielding
security, thus decreasing the net investment income to the Fund and dividends
to shareholders.     
   
  The Fund may have difficulty disposing of certain high yield securities
because there may be a thin trading market for such securities. Because not all
dealers maintain markets in all high yield securities, there is no established
secondary market for many of these securities, and the Fund anticipates that
such securities could be sold only to a limited number of dealers or
institutional investors. To the extent that a secondary trading market for high
yield securities does exist, it generally is not as liquid as the secondary
market for higher rated securities. Reduced secondary market liquidity may have
an adverse impact on market price and the Fund's ability to dispose of
particular issues when necessary to meet the Fund's liquidity needs or in
response to a specific economic event such as a deterioration in the
creditworthiness of the issuer. Reduced secondary market liquidity for certain
securities also may make it more difficult for the Fund to obtain accurate
market quotations for purposes of valuing the Fund's portfolio. Market
quotations are generally available on many high yield securities only from a
limited number of dealers and may not necessarily represent firm bids of such
dealers or prices for actual sales.     
   
  It is expected that a significant portion of the high yield securities
acquired by the Fund will be purchased upon issuance, which may involve special
risks because the securities so acquired are new issues. In such instances, the
Fund may be a substantial purchaser of the issue and therefore have the
opportunity to participate in structuring the terms of the offering. Although
this may enable the Fund to seek to protect itself against certain of such
risks, the considerations discussed herein would nevertheless remain
applicable.     
   
  Adverse publicity and investor perceptions, which may not be based on
fundamental analysis, also may decrease the value and liquidity of high yield
securities, particularly in a thinly traded market. Factors adversely affecting
the market value of high yield securities are likely to adversely affect the
Fund's net asset value. In addition, the Fund may incur additional expenses to
the extent that it is required to seek recovery upon a default on a portfolio
holding or participate in the restructuring of the obligation.     
 
            DESCRIPTION OF MUNICIPAL BONDS AND TEMPORARY INVESTMENTS
 
  Set forth below is a description of the Municipal Bonds and Temporary
Investments in which the Fund may invest. A more complete discussion concerning
futures and options transactions is set forth under "Investment Objective and
Policy" in the Prospectus. Information with respect to ratings assigned to tax-
exempt obligations which the Fund may purchase is set forth in Appendix II to
this Statement of Additional Information.
 
                                       5
<PAGE>
 
DESCRIPTION OF MUNICIPAL BONDS
   
  Municipal Bonds include debt obligations issued to obtain funds for various
public purposes, including construction of a wide range of public facilities,
financing governmental programs, refunding outstanding obligations and
obtaining funds for general operating expenses and loans to other public
institutions. In addition, certain types of bonds are issued by or on behalf of
public authorities to finance or refinance various privately owned or operated
facilities. Such obligations are included within the term Municipal Bonds if
the interest paid thereon is excluded from gross income for Federal income tax
purposes. Other types of industrial development bonds or private activity
bonds, the proceeds of which are used for the construction, equipment or
improvement of privately owned or operated facilities, may constitute Municipal
Bonds, although current Federal tax laws place substantial limitations on the
size and permitted purposes of such issues.     
 
  The two principal classifications of Municipal Bonds are "general obligation"
and "revenue" bonds, which latter category includes industrial development
bonds ("IDBs") and, for bonds issued after August 15, 1986, private activity
bonds. General obligation bonds are secured by the issuer's pledge of its full
faith, credit and taxing power for the payment of principal and interest.
Revenue bonds are payable only from the revenues derived from a particular
facility or class of facilities or, in some cases, from the proceeds of a
special or limited tax or other specific revenue source such as payments from
the user of the facility being financed. IDBs and private activity bonds are in
most cases revenue bonds and generally do not constitute the pledge of the
credit or taxing power of the issuer of such bonds. Generally, the payment of
the principal of and interest on such IDBs or private activity bonds depends
solely on the ability of the user of the facility financed by the bonds to meet
its financial obligations and the pledge, if any, of real and personal property
so financed as security for such payment, unless a letter of credit, bond
insurance or other security is furnished. The Fund may invest in "moral
obligation" bonds, which are normally issued by special purpose public
authorities. If an issuer of moral obligation bonds is unable to meet its
obligations, the repayment of such bonds becomes a moral commitment, but not a
legal obligation, of the state or municipality in question.
   
  Also included within the general category of Municipal Bonds are
participation certificates that represent participations in a lease, an
installment purchase contract or a conditional sales contract (hereinafter
collectively called "lease obligations") entered into by a governmental entity
or authority to finance the acquisition or construction of land, buildings,
equipment or other facilities. Although lease obligations ordinarily do not
constitute general obligations of the issuer for which the lessee's unlimited
taxing power is pledged, a lease obligation is frequently backed by the
issuer's covenant to budget for, appropriate and make the payments due under
the lease obligation. However, certain lease obligations contain "non-
appropriation" clauses which provide that the issuer has no obligation to make
lease or installment purchase payments in future years unless money is
appropriated for such purpose on a yearly basis. Although "non-appropriation"
lease obligations are secured by the leased property, disposition of the
property in the event of non-appropriation and repossession might prove
difficult. These securities represent a relatively new type of financing that
has not yet developed the depth of marketability associated with more
conventional securities. Certain investments in lease obligations may be
illiquid. The Fund may not invest in illiquid lease obligations if such
investments, together with all other illiquid investments, would exceed 15% of
the Fund's total assets. The Fund may, however, invest without regard to such
limitation in lease obligations which the Manager, pursuant to the guidelines
which have been adopted by the Board of Trustees and subject to the supervision
of the Board of Trustees, determines to be liquid. The Manager will deem lease
obligations liquid if they are publicly offered and have received an investment
grade rating of Baa or better by Moody's, or BBB or better     
 
                                       6
<PAGE>
 
by Standard & Poor's or Fitch. Unrated lease obligations, or those rated below
investment grade, will be considered liquid if the obligations come to the
market through an underwritten public offering and at least two dealers are
willing to give competitive bids. In reference to the latter, the Manager must,
among other things, also review the creditworthiness of the governmental entity
that is obligated to make payment under the lease obligation and make certain
specified determinations based on such factors as the existence of a rating or
credit enhancement such as insurance, the frequency of trades or quotes for the
obligations and the willingness of dealers to make a market in the obligations.
 
  Yields on Municipal Bonds are dependent on a variety of factors, including
the general condition of the money market and of the municipal bond market, the
size of a particular offering, the financial condition of the issuer or the
entity responsible for payment, the general conditions of the Municipal Bond
market, the maturity of the obligation and the rating of the issue or the
absence of a rating. The ability of the Fund to achieve its investment
objective is also dependent on the continuing ability of the issuers or the
entities responsible for payment of the bonds in which the Fund invests to meet
their obligations for the payment of interest and principal when due. There are
variations in the risks involved in holding Municipal Bonds, both within a
particular classification and between classifications, depending on numerous
factors. Furthermore, the rights of owners of Municipal Bonds and the
obligations of the issuer or the entity responsible for payment of such
Municipal Bonds may be subject to applicable bankruptcy, insolvency and similar
laws and court decisions affecting the rights of creditors generally and to
general equitable principles, which may limit the enforcement of certain
remedies.
 
DESCRIPTION OF TEMPORARY INVESTMENTS
 
  The Fund may invest in short-term tax-free and taxable securities subject to
the limitations set forth under "Investment Objective and Policies". The tax-
exempt money market securities may include municipal notes, municipal
commercial paper, municipal bonds with a remaining maturity of less than one
year, variable rate demand notes and participations therein. Municipal notes
include tax anticipation notes, bond anticipation notes and grant anticipation
notes. Anticipation notes are sold as interim financing in anticipation of tax
collection, bond sales, government grants or revenue receipts. Municipal
commercial paper refers to short-term unsecured promissory notes generally
issued to finance short-term credit needs. The taxable money market securities
in which the Fund may invest as Temporary Investments consist of U.S.
Government securities, U.S. Government agency securities, domestic bank or
savings institution certificates of deposit and bankers' acceptances, short-
term corporate debt securities such as commercial paper, and repurchase
agreements. These Temporary Investments must have a stated maturity not in
excess of one year from the date of purchase.
 
  Variable rate demand obligations ("VRDOs") are tax-exempt obligations which
contain a floating or variable interest rate adjustment formula and an
unconditional right of demand on the part of the holder thereof to receive
payment of the unpaid principal balance plus accrued interest upon a short
notice period not to exceed seven days. There is, however, the possibility that
because of default or insolvency the demand feature of VRDOs and Participating
VRDOs, described below, may not be honored. The interest rates are adjustable
at intervals (ranging from daily to up to one year) to some prevailing market
rate for similar investments, such adjustment formula being calculated to
maintain the market value of the VRDO at approximately the par value of the
VRDOs on the adjustment date. The adjustments typically are set at a
 
                                       7
<PAGE>
 
   
rate determined by the remarketing agent or based upon the Public Securities
Association Index or some other appropriate interest rate adjustment index. The
Fund may invest in all types of tax-exempt instruments currently outstanding or
to be issued in the future which satisfy the short-term maturity and quality
standards of the Fund.     
 
  The Fund also may invest in VRDOs in the form of participation interests
("Participating VRDOs") in variable rate tax-exempt obligations held by a
financial institution, typically a commercial bank. Participating VRDOs provide
the Fund with a specified undivided interest (up to 100%) of the underlying
obligation and the right to demand payment of the unpaid principal balance plus
accrued interest on the Participating VRDOs from the financial institution upon
a specified number of days' notice, not to exceed seven days. In addition, a
Participating VRDO is backed by an irrevocable letter of credit or guaranty of
the financial institution. The Fund would have an undivided interest in the
underlying obligation and thus participate on the same basis as the financial
institution in such obligation except that the financial institution typically
retains fees out of the interest paid on the obligation for servicing the
obligation, providing the letter of credit and issuing the repurchase
commitment. The Fund has been advised by its counsel that the Fund should be
entitled to treat the income received on Participating VRDOs as interest from
tax-exempt obligations.
 
  VRDOs that contain an unconditional right of demand to receive payment of the
unpaid principal balance plus accrued interest on a notice period exceeding
seven days may be deemed to be illiquid securities. A VRDO with a demand notice
period exceeding seven days will therefore be subject to the Fund's restriction
on illiquid investments unless, in the judgment of the Trustees, such VRDO is
liquid. The Trustees may adopt guidelines and delegate to the Manager the daily
function of determining and monitoring liquidity of such VRDOs. The Trustees,
however, will retain sufficient oversight and will be ultimately responsible
for such determination.
   
  The Trust has established the following standards with respect to money
market securities and VRDOs in which the Fund invests. Commercial paper
investments at the time of purchase must be rated A-1 through A-3 by Standard &
Poor's, Prime-1 through Prime-3 by Moody's or F-1 through F-3 by Fitch or, if
not rated, issued by companies having an outstanding debt issue rated at least
A by Standard & Poor's, Fitch or Moody's. Investments in corporate bonds and
debentures (which must have maturities at the date of purchase of one year or
less) must be rated at the time of purchase at least A by Standard & Poor's,
Moody's or Fitch. Notes and VRDOs at the time of purchase must be rated SP-1/A-
1 through SP-2/A-3 by Standard & Poor's, MIG-l/VMIG-1 through MIG-4/VMIG-4 by
Moody's or F-1 through F-3 by Fitch. Temporary Investments, if not rated, must
be of comparable quality to securities rated in the above rating categories in
the opinion of the Manager. The Fund may not invest in any security issued by a
commercial bank or a savings institution unless the bank or institution is
organized and operating in the United States, has total assets of at least one
billion dollars and is a member of the Federal Deposit Insurance Corporation
("FDIC"), except that up to 10% of total assets may be invested in certificates
of deposit of small institutions if such certificates are fully insured by the
FDIC.     
 
REPURCHASE AGREEMENTS
 
  The Fund may invest in securities pursuant to repurchase agreements.
Repurchase agreements may be entered into only with a member bank of the
Federal Reserve System or a primary dealer in U.S. Government
 
                                       8
<PAGE>
 
   
securities or an affiliate thereof. Under such agreements, the seller agrees,
upon entering into the contract, to repurchase the security at a mutually
agreed upon time and price, thereby determining the yield during the term of
the agreement. This results in a fixed rate of return insulated from market
fluctuations during such period. In repurchase agreements, the prices at which
the trades are conducted do not reflect accrued interest on the underlying
obligations. Such agreements usually cover short periods, such as under one
week. Repurchase agreements may be construed to be collateralized loans by the
purchaser to the seller secured by the securities transferred to the purchaser.
In a repurchase agreement, the Fund will require the seller to provide
additional collateral if the market value of the securities falls below the
repurchase price at any time during the term of the repurchase agreement. In
the event of default by the seller under a repurchase agreement construed to be
a collateralized loan, the underlying securities are not owned by the Fund but
only constitute collateral for the seller's obligation to pay the repurchase
price. Therefore, the Fund may suffer time delays and incur costs or possible
losses in connection with the disposition of the collateral. In the event of a
default under such a repurchase agreement, instead of the contractual fixed
rate of return, the rate of return to the Fund will depend on intervening
fluctuations of the market value of such security and the accrued interest on
the security. In such event, the Fund would have rights against the seller for
breach of contract with respect to any losses arising from market fluctuations
following the failure of the seller to perform. The Fund may not invest more
than 10% of its net assets in repurchase agreements maturing in more than seven
days if such investments, together with all other illiquid investments, would
exceed 15% of the Fund's total assets.     
 
  In general, for Federal income tax purposes, repurchase agreements are
treated as collateralized loans secured by the securities "sold". Therefore,
amounts earned under such agreements will not be considered tax-exempt
interest.
 
FINANCIAL FUTURES TRANSACTIONS AND OPTIONS
 
  Reference is made to the discussion concerning futures transactions under
"Investment Objective and Policies" in the Prospectus. Set forth below is
additional information concerning these transactions.
 
  As described in the Prospectus, the Fund may purchase and sell exchange
traded financial futures contracts ("financial futures contracts") to hedge its
portfolio of Municipal Bonds against declines in the value of such securities
and to hedge against increases in the cost of securities the Fund intends to
purchase. However, any transactions involving financial futures or options (and
puts and calls associated therewith) will be in accordance with the Fund's
investment policies and limitations. See "Investment Objective and Policies--
Investment Restrictions" in the Prospectus. To hedge its portfolio, the Fund
may take an investment position in a futures contract which will move in the
opposite direction from the portfolio position being hedged. While the Fund's
use of hedging strategies is intended to moderate capital changes in portfolio
holdings and thereby reduce the volatility of the net asset value of Fund
shares, the Fund anticipates that its net asset value will fluctuate. Set forth
below is information concerning futures transactions.
 
  Description of Futures Contracts. A futures contract is an agreement between
two parties to buy and sell a security or, in the case of an index-based
futures contract, to make and accept a cash settlement for a set price on a
future date. A majority of transactions in futures contracts, however, do not
result in the actual
 
                                       9
<PAGE>
 
delivery of the underlying instrument or cash settlement, but are settled
through liquidation, i.e., by entering into an offsetting transaction. Futures
contracts have been designed by boards of trade which have been designated
"contracts markets" by the Commodity Futures Trading Commission ("CFTC").
 
  The purchase or sale of a futures contract differs from the purchase or sale
of a security in that no price or premium is paid or received. Instead, an
amount of cash or securities acceptable to the broker and the relevant contract
market, which varies, but is generally about 5% of the contract amount, must be
deposited with the broker. This amount is known as "initial margin" and
represents a "good faith" deposit assuring the performance of both the
purchaser and seller under the futures contract. Subsequent payments to and
from the broker, called "variation margin", are required to be made on a daily
basis as the price of the futures contract fluctuates making the long and short
positions in the futures contract more or less valuable, a process known as
"mark to the market". At any time prior to the settlement date of the futures
contract, the position may be closed out by taking an opposite position which
will operate to terminate the position in the futures contract. A final
determination of variation margin is then made, additional cash is required to
be paid to or released by the broker, and the purchaser realizes a loss or
gain. In addition, a nominal commission is paid on each completed sale
transaction.
 
  The Fund may deal in financial futures contracts based on a long-term
municipal bond index developed by the Chicago Board of Trade ("CBT") and The
Bond Buyer (the "Municipal Bond Index"). The Municipal Bond Index is comprised
of 40 tax-exempt municipal revenue and general obligations bonds. Each bond
included in the Municipal Bond Index must be rated A or higher by Moody's or
Standard & Poor's and must have a remaining maturity of 19 years or more. Twice
a month new issues satisfying the eligibility requirements are added to, and an
equal number of old issues are deleted from, the Municipal Bond Index. The
value of the Municipal Bond Index is computed daily according to a formula
based on the price of each bond in the Municipal Bond Index, as evaluated by
six dealer-to-dealer brokers.
 
  The Municipal Bond Index futures contract is traded only on the CBT. Like
other contract markets, the CBT assures performance under futures contracts
through a clearing corporation, a nonprofit organization managed by the
exchange membership which is also responsible for handling daily accounting of
deposits or withdrawals of margin.
 
  As described in the Prospectus, the Fund may purchase and sell financial
futures contracts on U.S. Government securities as a hedge against adverse
changes in interest rates as described below. With respect to U.S. Government
securities, currently there are financial futures contracts based on long-term
U.S. Treasury bonds, Treasury notes, Government National Mortgage Association
("GNMA") Certificates and three-month U.S. Treasury bills. The Fund may
purchase and write call and put options on futures contracts on U.S. Government
securities in connection with its hedging strategies.
 
  Subject to policies adopted by the Trustees, the Fund also may engage in
other futures contracts transactions such as futures contracts on other
municipal bond indices which may become available if the Manager and the
Trustees should determine that there is normally a sufficient correlation
between the prices of such futures contracts and the Municipal Bonds in which
the Fund invests to make such hedging appropriate.
 
                                       10
<PAGE>
 
  Futures Strategies. The Fund may sell a financial futures contract (i.e.,
assume a short position) in anticipation of a decline in the value of its
investments in Municipal Bonds resulting from an increase in interest rates or
otherwise. The risk of decline could be reduced without employing futures as a
hedge by selling such Municipal Bonds and either reinvesting the proceeds in
securities with shorter maturities or by holding assets in cash. This
strategy, however, entails increased transaction costs in the form of dealer
spreads and typically would reduce the average yield of the Fund's portfolio
securities as a result of the shortening of maturities. The sale of futures
contracts provides an alternative means of hedging against declines in the
value of its investments in Municipal Bonds. As such values decline, the value
of the Fund's positions in the futures contracts will tend to increase, thus
offsetting all or a portion of the depreciation in the market value of the
Fund's Municipal Bond investments which are being hedged. While the Fund will
incur commission expenses in selling and closing out futures positions,
commissions on futures transactions are lower than transaction costs incurred
in the purchase and sale of Municipal Bonds. In addition, the ability of the
Fund to trade in the standardized contracts available in the futures markets
may offer a more effective defensive position than a program to reduce the
average maturity of the portfolio securities due to the unique and varied
credit and technical characteristics of the municipal debt instruments
available to the Fund. Employing futures as a hedge also may permit the Fund
to assume a defensive posture without reducing the yield on its investments
beyond any amounts required to engage in futures trading.
 
  When the Fund intends to purchase Municipal Bonds, the Fund may purchase
futures contracts as a hedge against any increase in the cost of such
Municipal Bonds, resulting from an increase in interest rates or otherwise,
that may occur before such purchases can be effected. Subject to the degree of
correlation between the Municipal Bonds and the futures contracts, subsequent
increases in the cost of Municipal Bonds should be reflected in the value of
the futures held by the Fund. As such purchases are made, an equivalent amount
of futures contracts will be closed out. Due to changing market conditions and
interest rate forecasts, however, a futures position may be terminated without
a corresponding purchase of portfolio securities.
 
  Call Options on Futures Contracts. The Fund also may purchase and write
exchange traded call and put options on financial futures contracts on U.S.
Government securities. The purchase of a call option on a futures contract is
analogous to the purchase of a call option on an individual security.
Depending on the pricing of the option compared to either the futures contract
on which it is based or on the price of the underlying debt securities, it may
or may not be less risky than ownership of the futures contract or underlying
debt securities. Like the purchase of a futures contract, the Fund will
purchase a call option on a futures contract to hedge against a market advance
when the Fund is not fully invested.
 
  The writing of a call option on a futures contract constitutes a partial
hedge against declining prices of the securities which are deliverable upon
exercise of the futures contract. If the futures price at expiration is below
the exercise price, the Fund will retain the full amount of the option premium
which provides a partial hedge against any decline that may have occurred in
the Fund's portfolio holdings.
 
  Put Options on Futures Contracts. The purchase of options on a futures
contract is analogous to the purchase of protective put options on portfolio
securities. The Fund will purchase put options on futures contracts to hedge
the Fund's portfolio against the risk of rising interest rates.
 
                                      11
<PAGE>
 
  The writing of a put option on a futures contract constitutes a partial hedge
against increasing prices of the securities which are deliverable upon exercise
of the futures contract. If the futures price at expiration is higher than the
exercise price, the Fund will retain the full amount of the option premium
which provides a partial hedge against any increase in the price of Municipal
Bonds which the Fund intends to purchase.
 
  The writer of an option on a futures contract is required to deposit initial
and variation margin pursuant to requirements similar to those applicable to
futures contracts. Premiums received from the writing of an option will be
included in initial margin. The writing of an option on a futures contract
involves risks similar to those relating to futures contracts.
 
                               ----------------
   
  The Trust has received an order from the Commission exempting it from the
provisions of Section 17(f) and Section 18(f) of the Investment Company Act of
1940, as amended (the "1940 Act"), in connection with its strategy of investing
in futures contracts. Section 17(f) relates to the custody of securities and
other assets of an investment company and may be deemed to prohibit certain
arrangements between the Trust and commodities brokers with respect to initial
and variation margin. Section 18(f) of the 1940 Act prohibits an open-end
investment company such as the Trust from issuing a "senior security" other
than a borrowing from a bank. The staff of the Commission has in the past
indicated that a futures contract may be a "senior security" under the 1940
Act.     
 
  Restrictions on Use of Futures Transactions. Regulations of the CFTC
applicable to the Fund require that all of the Fund's futures transactions
constitute bona fide hedging transactions and that the Fund purchase and sell
futures contracts and options thereon (i) for bona fide hedging purposes, and
(ii) for non-hedging purposes, if the aggregate initial margin and premiums
required to establish positions in such contracts and options does not exceed
5% of the liquidation value of the Fund's portfolio assets after taking into
account unrealized profits and unrealized losses on any such contracts and
options. (However, the Fund intends to engage in options and futures
transactions only for hedging purposes.) Margin deposits may consist of cash or
securities acceptable to the broker and the relevant contract market.
   
  When the Fund purchases futures contracts or a call option with respect
thereto or writes a put option on a futures contract, an amount of cash, cash
equivalents or liquid securities will be deposited in a segregated account with
the Fund's custodian so that the amount so segregated, plus the amount of
initial and variation margin held in the account of its broker, equals the
market value of the futures contract, thereby ensuring that the use of such
futures is unleveraged.     
 
  Risk Factors in Futures Transactions and Options. Investment in futures
contracts involves the risk of imperfect correlation between movements in the
price of the futures contract and the price of the security being hedged. The
hedge will not be fully effective when there is imperfect correlation between
the movements in the prices of two financial instruments. For example, if the
price of the futures contract moves more than the price of the hedged security,
the Fund will experience either a loss or gain on the futures contract which is
not completely offset by movements in the price of the hedged securities. To
compensate for imperfect correlations, the Fund may purchase or sell futures
contracts in a greater dollar amount than the hedged securities if the
volatility of the hedged securities is historically greater than the volatility
of the futures contracts. Conversely, the Fund may purchase or sell fewer
futures contracts if the volatility of the price of the hedged securities is
historically less than that of the futures contracts.
 
 
                                       12
<PAGE>
 
  The particular municipal bonds comprising the index underlying the Municipal
Bond Index financial futures contract may vary from the Municipal Bonds held by
the Fund. As a result, the Fund's ability to hedge effectively all or a portion
of the value of its Municipal Bonds through the use of such financial futures
contracts will depend in part on the degree to which price movements in the
index underlying the financial futures contract correlate with the price
movements of the Municipal Bonds held by the Fund. The correlation may be
affected by disparities in the average maturity, ratings, geographical mix or
structure of the Fund's investments as compared to those comprising the
Municipal Bond Index and general economic or political factors. In addition,
the correlation between movements in the value of the Municipal Bond Index may
be subject to change over time as additions to and deletions from the Municipal
Bond Index alter its structure. The correlation between futures contracts on
U.S. Government securities and the Municipal Bonds held by the Fund may be
adversely affected by similar factors, and the risk of imperfect correlation
between movements in the prices of such futures contracts and the prices of the
Municipal Bonds held by the Fund may be greater.
 
  The Fund expects to liquidate a majority of the futures contracts it enters
into through offsetting transactions on the applicable contract market. There
can be no assurance, however, that a liquid secondary market will exist for any
particular futures contract at any specific time. Thus, it may not be possible
to close out a futures position. In the event of adverse price movements, the
Fund would continue to be required to make daily cash payments of variation
margin. In such situations, if the Fund has insufficient cash, it may be
required to sell portfolio securities to meet daily variation margin
requirements at a time when it may be disadvantageous to do so. The inability
to close out futures positions also could have an adverse impact on the Fund's
ability to hedge effectively its investments in Municipal Bonds. The Fund will
enter into a futures position only if, in the judgment of the Manager, there
appears to be an actively traded secondary market for such futures contracts.
 
  The successful use of transactions in futures and related options also
depends on the ability of the Manager to forecast correctly the direction and
extent of interest rate movements within a given time frame. To the extent
interest rates remain stable during the period in which a futures contract or
option is held by the Fund or such rates move in a direction opposite to that
anticipated, the Fund may realize a loss on the hedging transaction which is
not fully or partially offset by an increase in the value of portfolio
securities. As a result, the Fund's total return for such period may be less
than if it had not engaged in the hedging transaction.
 
  Because of low initial margin deposits made on the opening of a futures
position, futures transactions involve substantial leverage. As a result,
relatively small movements in the price of the futures contracts can result in
substantial unrealized gains or losses. Because the Fund will engage in the
purchase and sale of futures contracts solely for hedging purposes, however,
any losses incurred in connection therewith should, if the hedging strategy is
successful, be offset in whole or in part by increases in the value of
securities held by the Fund or decreases in the price of securities the Fund
intends to acquire.
 
  The amount of risk the Fund assumes when it purchases an option on a futures
contract is the premium paid for the option plus related transaction costs. In
addition to the correlation risks discussed above, the purchase of an option on
a futures contract also entails the risk that changes in the value of the
underlying futures contract will not be fully reflected in the value of the
option purchased.
 
 
                                       13
<PAGE>
 
  Municipal Bond Index futures contracts were approved for trading in 1986.
Trading in such futures contracts may tend to be less liquid than that in other
futures contracts. The trading of futures contracts also is subject to certain
market risks, such as inadequate trading activity, which could at times make it
difficult or impossible to liquidate existing positions.
 
                            INVESTMENT RESTRICTIONS
 
  The Fund has adopted a number of fundamental and non-fundamental restrictions
and policies relating to the investment of its assets and its activities. The
fundamental policies set forth below may not be changed without the approval of
the holders of a majority of the Fund's outstanding voting securities (which
for this purpose and under the 1940 Act means the lesser of (i) 67% of the
Fund's shares present at a meeting at which more than 50% of the outstanding
shares of the Fund are represented or (ii) more than 50% of the Fund's
outstanding shares). The Fund may not:
     
    1. Invest more than 25% of its assets, taken at market value at the time
  of each investment, in the securities of issuers in any particular industry
  (excluding the U.S. Government and its agencies and instrumentalities). For
  purposes of this restriction, states, municipalities and their political
  subdivisions are not considered part of any industry.     
 
    2. Make investments for the purpose of exercising control or management.
 
    3. Purchase or sell real estate, except that, to the extent permitted by
  applicable law, the Fund may invest in securities directly or indirectly
  secured by real estate or interests therein or issued by companies which
  invest in real estate or interests therein.
 
    4. Make loans to other persons, except that the acquisition of bonds,
  debentures or other corporate debt securities and investment in government
  obligations, commercial paper, pass-through instruments, certificates of
  deposit, bankers acceptances, repurchase agreements or any similar
  instruments shall not be deemed to be the making of a loan, and except
  further that the Fund may lend its portfolio securities, provided that the
  lending of portfolio securities may be made only in accordance with
  acceptable law and the guidelines set forth in the Fund's Prospectus and
  Statement of Additional Information, as they may be amended from time to
  time.
 
    5. Issue senior securities to the extent such issuance would violate
  applicable law.
     
    6. Borrow money, except that (i) the Fund may borrow from banks (as
  defined in the 1940 Act) in amounts up to 33 1/3% of its total assets
  (including the amount borrowed), (ii) the Fund may, to the extent permitted
  by applicable law, borrow up to an additional 5% of its total assets for
  temporary purposes, (iii) the Fund may obtain such short-term credit as may
  be necessary for the clearance of purchases and sales of portfolio
  securities and (iv) the Fund may purchase securities on margin to the
  extent permitted by applicable law. The Fund may not pledge its assets
  other than to secure such borrowings or, to the extent permitted by the
  Fund's investment policies as set forth in its Prospectus and Statement of
  Additional Information, as they may be amended from time to time, in
  connection with hedging transactions, short sales, when-issued and forward
  commitment transactions and similar investment strategies.     
 
                                       14
<PAGE>
 
    7. Underwrite securities of other issuers, except insofar as the Fund
  technically may be deemed an underwriter under the Securities Act of 1933,
  as amended (the "Securities Act"), in selling portfolio securities.
 
    8. Purchase or sell commodities or contracts on commodities, except to
  the extent that the Fund may do so in accordance with applicable law and
  the Fund's Prospectus and Statement of Additional Information, as they may
  be amended from time to time, and without registering as a commodity pool
  operator under the Commodity Exchange Act.
 
  Under the non-fundamental investment restrictions, the Fund may not:
 
    a. Purchase securities of other investment companies, except to the
  extent such purchases are permitted by applicable law.
 
    b. Make short sales of securities or maintain a short position, except to
  the extent permitted by applicable law. The Fund currently does not intend
  to engage in short sales, except short sales "against the box."
     
    c. Invest in securities which cannot be readily resold because of legal
  or contractual restrictions or which cannot otherwise be marketed, redeemed
  or put to the issuer or a third party, if at the time of acquisition more
  than 15% of its total assets would be invested in such securities. This
  restriction shall not apply to securities which mature within seven days or
  securities which the Board of Trustees of the Trust has otherwise
  determined to be liquid pursuant to applicable law.     
     
    d. Invest in warrants if, at the time of acquisition, its investments in
  warrants, valued at the lower of cost or market value, would exceed 5% of
  the Fund's total assets; included within such limitation, but not to exceed
  2% of the Fund's total assets, are warrants which are not listed on the New
  York Stock Exchange (the "NYSE") or American Stock Exchange or a major
  foreign exchange. For purposes of this restriction, warrants acquired by
  the Fund in units or attached to securities may be deemed to be without
  value.     
 
    e. Invest in securities of companies having a record, together with
  predecessors, of less than three years of continuous operation, if more
  than 5% of the Fund's total assets would be invested in such securities.
  This restriction shall not apply to mortgage-backed securities, asset-
  backed securities or obligations issued or guaranteed by the U.S.
  Government, its agencies or instrumentalities.
 
    f. Purchase or retain the securities of any issuer, if those individual
  officers and Trustees of the Trust, the officers and general partner of the
  Manager, the directors of such general partner or the officers and
  directors of any subsidiary thereof each owning beneficially more than one-
  half of one percent of the securities of such issuer own in the aggregate
  more than 5% of the securities of such issuer.
 
    g. Invest in real estate limited partnership interests or interests in
  oil, gas or other mineral leases, or exploration or development programs,
  except that the Fund may invest in securities issued by companies that
  engage in oil, gas or other mineral exploration or development activities.
 
    h. Write, purchase or sell puts, calls, straddles, spreads or
  combinations thereof, except to the extent permitted in the Fund's
  Prospectus and Statement of Additional Information, as they may be amended
  from time to time.
 
 
                                       15
<PAGE>
 
    i. Notwithstanding fundamental investment restriction (6) above, borrow
  amounts in excess of 20% of its total assets, taken at market value
  (including the amount borrowed), and then only from banks as a temporary
  measure for extraordinary or emergency purposes. In addition, the Fund will
  not purchase securities while borrowings are outstanding.
 
  In addition, to comply with Federal income tax requirements for qualification
as a "regulated investment company", the Fund's investments will be limited in
a manner such that, at the close of each quarter of each fiscal year, (a) no
more than 25% of the Fund's total assets are invested in the securities of a
single issuer, and (b) with regard to at least 50% of the Fund's total assets,
no more than 5% of its total assets are invested in the securities of a single
issuer. For purposes of this restriction, the Fund will regard each state and
each political subdivision, agency or instrumentality of such state and each
multi-state agency of which such state is a member and each public authority
which issues securities on behalf of a private entity as a separate issuer,
except that if the security is backed only by the assets and revenues of a non-
governmental entity then the entity with the ultimate responsibility for the
payment of interest and principal may be regarded as the sole issuer. These
tax-related limitations may be changed by the Trustees of the Trust to the
extent necessary to comply with changes to the Federal income tax requirements.
 
                               ----------------
 
  Because of the affiliation of Merrill Lynch, Pierce, Fenner & Smith
Incorporated ("Merrill Lynch") with the Trust, the Fund is prohibited from
engaging in certain transactions involving such firm or its affiliates except
for brokerage transactions permitted under the 1940 Act involving only usual
and customary commissions or transactions pursuant to an exemptive order under
the 1940 Act. Included among such restricted transactions will be purchases
from or sales to Merrill Lynch of securities in transactions in which it acts
as principal. See "Portfolio Transactions". An exemptive order has been
obtained which permits the Trust to effect principal transactions with Merrill
Lynch in high quality, short-term, tax-exempt securities subject to conditions
set forth in such order.
 
                            MANAGEMENT OF THE TRUST
 
TRUSTEES AND OFFICERS
 
  Information about the Trustees, executive officers and portfolio manager of
the Trust, including their ages and principal occupations for at least the last
five years, is set forth below. Unless otherwise noted, the address of each
Trustee and executive officer is P.O. Box 9011, Princeton, New Jersey 08543-
9011.
   
  Arthur Zeikel (64) -- President and Trustee(1)(2) -- President of the Manager
(which term as used herein includes the Manager's corporate predecessors) since
1977; President of Merrill Lynch Asset Management, L.P. ("MLAM," which term as
used herein includes MLAM's corporate predecessors) since 1977; President and
Director of Princeton Services, Inc. ("Princeton Services") since 1993;
Executive Vice President of Merrill Lynch & Co., Inc. ("ML & Co.") since 1990;
Director of Merrill Lynch Funds Distributor, Inc. ("MLFD" or the "Distributor")
since 1977.     
 
                                       16
<PAGE>
 
   
  James H. Bodurtha (52) -- Trustee(2) -- 36 Popponesset Road, Cotuit,
Massachusetts 02635. Director and Executive Vice President, The China Business
Group, Inc. since 1996; Chairman and Chief Executive Officer, China Enterprise
Management Corporation from 1993 to 1996; Chairman, Berkshire Corporation since
1980; Partner, Squire, Sanders & Dempsey from 1990 to 1993.     
   
  Herbert I. London (57) -- Trustee(2) -- 113-115 University Place, New York,
New York 10003. John M. Olin Professor of Humanities, New York University since
1993 and Professor thereof since 1980; Dean, Gallatin Division of New York
University from 1978 to 1993; Distinguished Fellow, Herman Kahn Chair, Hudson
Institute from 1984 to 1985; Trustee, Hudson Institute since 1980; Director,
Damon Corporation since 1991; Overseer, Center for Naval Analyses from 1983 to
1993; Limited Partner, Hypertech L.P. since 1996.     
   
  Robert R. Martin (69) -- Trustee(2) -- 513 Grand Hill, St. Paul, Minnesota
55102. Chairman and Chief Executive Officer, Kinnard Investments, Inc. from
1990 to 1993; Executive Vice President, Dain Bosworth from 1974 to 1989;
Director, Carnegie Capital Management from 1977 to 1985 and Chairman thereof in
1979; Director, Securities Industry Association from 1981 to 1982 and Public
Securities Association from 1979 to 1980; Chairman of the Board, WTC
Industries, Inc. in 1994; Trustee, Northland College since 1992.     
   
  Joseph L. May (67) -- Trustee(2) -- 424 Church Street, Suite 2000, Nashville,
Tennessee 37219. Attorney in private practice since 1984; President, May and
Athens Hosiery Mills Division, Wayne-Gossard Corporation from 1954 to 1983;
Vice President, Wayne-Gossard Corporation from 1972 to 1983; Chairman, The May
Corporation (personal holding company) from 1972 to 1983; Director, Signal
Apparel Co. from 1972 to 1989.     
   
  Andre F. Perold (44) -- Trustee(2) -- Morgan Hall, Soldiers Field, Boston,
Massachusetts 02163. Professor, Harvard Business School since 1989 and
Associate Professor from 1983 to 1989; Trustee, The Common Fund, since 1989;
Director, Quantec Limited since 1991.     
   
  Terry K. Glenn (56) -- Executive Vice President(1)(2) -- Executive Vice
President of the Manager and MLAM since 1983; Executive Vice President and
Director of Princeton Services since 1993; President of MLFD since 1986 and
Director thereof since 1991; President of Princeton Administrators, L.P. since
1988.     
   
  Vincent R. Giordano (52) -- Vice President(1)(2) -- Portfolio Manager of the
Manager and MLAM since 1977 and Senior Vice President of the Manager and MLAM
since 1984; Vice President of MLAM from 1980 to 1984; Senior Vice President of
Princeton Services since 1993.     
   
  Kenneth A. Jacob (45) -- Vice President(1)(2) -- Vice President of the
Manager and MLAM since 1984.     
   
  Fred K. Stuebe (46) -- Portfolio Manager(1)(2) -- Vice President of MLAM
since 1989.     
   
  Donald C. Burke (36) -- Vice President(1)(2) -- Vice President and Director
of Taxation of MLAM since 1990; Employee of Deloitte & Touche LLP from 1982 to
1990.     
 
                                       17
<PAGE>
 
   
  Gerald M. Richard (47) -- Treasurer(1)(2) -- Senior Vice President and
Treasurer of the Manager and MLAM since 1984; Senior Vice President and
Treasurer of Princeton Services since 1993; Treasurer of MLFD since 1984 and
Vice President thereof since 1981.     
   
  Jerry Weiss (38) -- Secretary(1)(2) -- Vice President of MLAM since 1990;
Attorney in private practice from 1982 to 1990.     
- --------
(1) Interested person, as defined in the 1940 Act, of the Trust.
(2) Such Trustee or officer is a director or officer of certain other
    investment companies for which the Manager or MLAM acts as investment
    adviser or manager.
   
  At September 30, 1996, the Trustees and officers of the Trust as a group (12
persons) owned an aggregate of less than 1% of the outstanding shares of
Common Stock of ML & Co. and owned an aggregate of less than 1% of the
outstanding shares of the Fund.     
 
COMPENSATION OF TRUSTEES
   
  The Trust pays each Trustee not affiliated with the Manager (each a "non-
affiliated Trustee") a fee of $10,000 per year plus $1,000 per meeting
attended, together with such Trustee's actual out-of-pocket expenses relating
to attendance at meetings. The Trust also compensates members of its Audit and
Nominating Committee (the "Committee"), which consists of all the non-
affiliated Trustees, an annual fee of $2,000 plus $500 per committee meeting
attended. The Trust reimburses each non-affiliated Trustee for his out-of-
pocket expenses relating to attendance at Board and Committee meetings. In
addition, the Chairman of the Committee receives an annual fee for serving as
Chairman of the Committee. The fees and expenses of the Trustees are allocated
to the respective series of the Trust on the basis of asset size. For the
fiscal year ended July 31, 1996, fees and expenses paid to non-affiliated
Trustees which were allocated to the Fund aggregated $2,852.     
   
  The following table sets forth for the fiscal year ended July 31, 1996,
compensation paid by the Fund to the non-affiliated Trustees and, for the
calendar year ended December 31, 1995, the aggregate compensation paid by all
registered investment companies (including the Fund) advised by the Manager
and its affiliate, MLAM ("FAM/MLAM Advised Funds") to the non-affiliated
Trustees:     
 
<TABLE>   
<CAPTION>
                                                                    AGGREGATE
                                                                   COMPENSATION
                                                     PENSION OR   FROM FUND AND
                                                     RETIREMENT       OTHER
                                                      BENEFITS       FAM/MLAM
                                                     ACCRUED AS   ADVISED FUNDS
                                      COMPENSATION PART OF FUND'S    PAID TO
NAME OF TRUSTEE                        FROM FUND      EXPENSES      TRUSTEE(1)
- ---------------                       ------------ -------------- --------------
<S>                                   <C>          <C>            <C>
James H. Bodurtha....................     $569          None         $157,500*
Herbert I. London....................     $569          None         $157,500
Robert R. Martin.....................     $569          None         $157,500
Joseph L. May........................     $569          None         $157,500
Andre F. Perold......................     $569          None         $157,500
</TABLE>    
- --------
   
(1) The Trustees serve on the boards of FAM/MLAM Advised Funds as follows: Mr.
    Bodurtha (22 registered investment companies consisting of 46 portfolios);
    Mr. London (22 registered investment companies consisting of 46
    portfolios); Mr. Martin (22 registered investment companies consisting of
    46 portfolios); Mr. May (22 registered investment companies consisting of
    46 portfolios); and Mr. Perold (22 registered investment companies
    consisting of 46 portfolios).     
   
  * $157,500 represents the amount Mr. Bodurtha would have received if he had
    been a Trustee for the entire calendar year ended December 31, 1995. Mr.
    Bodurtha was elected to the Trust's Board of Trustees effective June 23,
    1995.     
       
                                      18
<PAGE>
 
MANAGEMENT AND ADVISORY ARRANGEMENTS
 
  Reference is made to "Management of the Trust--Management and Advisory
Arrangements" in the Prospectus for certain information concerning the
management and advisory arrangements of the Fund.
 
  Securities may be held by, or be appropriate investments for, the Fund as
well as other funds or investment advisory clients of the Manager or its
affiliates. Because of different objectives or other factors, a particular
security may be bought for one or more clients when one or more clients are
selling the same security. If the Manager or its affiliates purchase or sell
securities for the Fund or other funds for which they act as manager or for
their advisory clients and such sales and purchases arise for consideration at
or about the same time, transactions in such securities will be made, insofar
as feasible, for the respective funds and clients in a manner deemed equitable
to all. To the extent that transactions on behalf of more than one client of
the Manager or its affiliates during the same period may increase the demand
for securities being purchased or the supply of securities being sold, there
may be an adverse effect on price.
   
  Pursuant to a management agreement between the Trust on behalf of the Fund
and the Manager (the "Management Agreement"), the Manager receives for its
services to the Fund monthly compensation based upon the average daily net
assets of the Fund at the following annual rates: 0.55% of the average daily
net assets not exceeding $500 million; 0.525% of the average daily net assets
exceeding $500 million but not exceeding $1.0 billion; and 0.50% of the average
daily net assets exceeding $1.0 billion. For the fiscal years ended July 31,
1994, 1995 and 1996, the total advisory fees payable by the Fund to the Manager
were $371,950, $334,353 and $328,665, respectively, of which $227,573, $104,227
and $65,688, respectively, was voluntarily waived.     
          
  The Management Agreement obligates the Manager to provide investment advisory
services and to pay all compensation of and furnish office space for officers
and employees of the Trust connected with investment and economic research,
trading and investment management of the Trust, as well as the fees of all
Trustees of the Trust who are affiliated persons of ML & Co. or any of its
affiliates. The Fund pays all other expenses incurred in its operation and, if
other Series shall be added ("Series"), a portion of the Trust's general
administrative expenses will be allocated on the basis of the asset size of the
respective Series. Expenses that will be borne directly by the Series include,
among other things, redemption expenses, expenses of portfolio transactions,
expenses of registering the shares under Federal and state securities laws,
pricing costs (including the daily calculation of net asset value), expenses of
printing shareholder reports, prospectuses and statements of additional
information (except to the extent paid by the Distributor as described below),
fees for legal and auditing services, Commission fees, interest, certain taxes
and other expenses attributable to a particular Series. Expenses which will be
allocated on the basis of asset size of the respective Series include fees and
expenses of unaffiliated Trustees, state franchise taxes, costs of printing
proxies and other expenses related to shareholder meetings and other expenses
properly payable by the Trust. The organizational expenses of the Trust were
paid by the Trust, and as additional Series are added to the Trust, the
organizational expenses are allocated among the Series (including the Fund) in
a manner deemed equitable by the Trustees. Depending upon the nature of a
lawsuit, litigation costs may be assessed to the specific Series to which the
lawsuit relates or allocated on the basis of the asset size of the respective
Series. The Trustees have determined that this is an appropriate method of
allocation of expenses. Accounting services are provided to the Fund by the
Manager, and the Fund reimburses the Manager for its costs in connection with
such services. For the fiscal years ended July 31, 1994, 1995 and 1996, the
Fund reimbursed the Manager     
 
                                       19
<PAGE>
 
   
$58,120, $34,563 and $52,951, respectively, for accounting services. As
required by the Fund's distribution agreements, the Distributor will pay the
promotional expenses of the Fund incurred in connection with the offering of
shares of the Fund. Certain expenses in connection with the account maintenance
and distribution of Class B and Class C shares will be financed by the Fund
pursuant to the Distribution Plans in compliance with Rule 12b-1 under the 1940
Act. See "Purchase of Shares--Deferred Sales Charge Alternatives--Class B and
Class C Shares--Distribution Plans".     
 
  The Manager is a limited partnership, the partners of which are ML & Co. and
Princeton Services, Inc. ML & Co. and Princeton Services are "controlling
persons" of the Manager as defined under the 1940 Act because of their
ownership of its voting securities or their power to exercise a controlling
influence over its management or policies.
 
  Duration and Termination. Unless earlier terminated as described below, the
Management Agreement will remain in effect from year to year if approved
annually (a) by the Trustees of the Trust or by a majority of the outstanding
shares of the Fund and (b) by a majority of the Trustees who are not parties to
such contract or interested persons (as defined in the 1940 Act) of any such
party. Such contracts are not assignable and may be terminated without penalty
on 60 days' written notice at the option of either party thereto or by vote of
the shareholders of the Fund.
 
                               PURCHASE OF SHARES
 
  Reference is made to "Purchase of Shares" in the Prospectus for certain
information as to the purchase of Fund shares.
 
  The Fund issues four classes of shares under the Merrill Lynch Select
PricingSM System: shares of Class A and Class D are sold to investors choosing
the initial sales charge alternatives, and shares of Class B and Class C are
sold to investors choosing the deferred sales charge alternatives. Each Class
A, Class B, Class C and Class D share of the Fund represents identical
interests in the investment portfolio of the Fund and has the same rights,
except that Class B, Class C and Class D shares bear the expenses of the
ongoing account maintenance fees, and Class B and Class C shares bear the
expenses of the ongoing distribution fees and the additional incremental
transfer agency costs resulting from the deferred sales charge arrangements.
Class B, Class C and Class D shares each have exclusive voting rights with
respect to the Rule 12b-1 distribution plan adopted with respect to such class
pursuant to which account maintenance and/or distribution fees are paid. Each
class has different exchange privileges. See "Shareholder Services--Exchange
Privilege".
   
  The Merrill Lynch Select PricingSM System is used by more than 50 registered
investment companies advised by MLAM or its affiliate, the Manager. Funds
advised by MLAM or the Manager which utilize the Merrill Lynch Select
Pricing SM System are referred to herein as "MLAM-advised mutual funds".     
 
  The Fund has entered into four separate distribution agreements with the
Distributor in connection with the continuous offering of each class of shares
of the Fund (the "Distribution Agreements"). The Distribution Agreements
obligate the Distributor to pay certain expenses in connection with the
offering of each class of shares of the Fund. After the prospectuses,
statements of additional information and periodic reports have been prepared,
set in type and mailed to shareholders, the Distributor pays for the printing
and distribution
 
                                       20
<PAGE>
 
of copies thereof used in connection with the offering to dealers and
prospective investors. The Distributor also pays for other supplementary sales
literature and advertising costs. The Distribution Agreements are subject to
the same renewal requirements and termination provisions as the Management
Agreement described above.
 
INITIAL SALES CHARGE ALTERNATIVES--CLASS A AND CLASS D SHARES
   
  The gross sales charges for the sale of Class A shares for the fiscal year
ended July 31, 1994 were $24,995, of which $2,219 was paid to the Distributor
and $22,776 was payable to Merrill Lynch (of which $7,593 was voluntarily
waived). The gross sales charges for the sale of Class A shares for the fiscal
year ended July 31, 1995 were $6,020, of which the Distributor received $520
and Merrill Lynch received $5,500. The gross sales charges for the sale of
Class A shares for the fiscal year ended July 31, 1996 were $54,038, of which
the Distributor received $318 and Merrill Lynch received $53,720. The gross
sales charges for the sale of Class D shares for the period October 21, 1994
(commencement of operations) to July 31, 1995 were $7,382, of which the
Distributor received $549 and Merrill Lynch received $6,833. The gross sales
charges for the sale of Class D shares for the fiscal year ended July 31, 1996
were $6,395, of which the Distributor received $116 and Merrill Lynch received
$6,279. For the fiscal year ended July 31, 1994, the Distributor received CDSCs
of $3,768 with respect to redemption within one year after purchase of Class A
shares purchased subject to a front-end sales charge waiver. For the fiscal
years ended July 31, 1995 and 1996, the Distributor received no CDSCs with
respect to redemption within one year after purchase of Class A shares
purchased subject to a front-end sales charge waiver. For the period October
21, 1994 (commencement of operations) to July 31, 1995 and for the fiscal year
ended July 31, 1996, the Distributor received no CDSCs with respect to
redemption within one year after purchase of Class D shares purchased subject
to a front-end sales charge of waiver.     
 
  The term "purchase", as used in the Prospectus and this Statement of
Additional Information in connection with an investment in Class A and Class D
shares of the Fund, refers to a single purchase by an individual, or to
concurrent purchases, which in the aggregate are at least equal to the
prescribed amounts, by an individual, his spouse and their children under the
age of 21 years purchasing shares for his or their own account and to single
purchases by a trustee or other fiduciary purchasing shares for a single trust
estate or single fiduciary account although more than one beneficiary is
involved. The term "purchase" also includes purchases by any "company", as that
term is defined in the 1940 Act, but does not include purchases by any such
company which has not been in existence for at least six months or which has no
purpose other than the purchase of shares of the Fund or shares of other
registered investment companies at a discount; provided, however, that it shall
not include purchases by any group of individuals whose sole organizational
nexus is that the participants therein are credit cardholders of a company,
policyholders of an insurance company, customers of either a bank or broker-
dealer or clients of an investment adviser.
   
  Closed-End Fund Option. Class A shares of the Fund and certain other MLAM-
advised mutual funds ("Eligible Class A shares") are offered at net asset value
to shareholders of certain closed-end funds advised by the Manager or MLAM who
purchased such closed-end fund shares prior to October 21, 1994, the date the
Merrill Lynch Select PricingSM System commenced operations, and wish to
reinvest the net proceeds of a sale of their closed-end fund shares of common
stock in Eligible Class A shares, if the conditions set forth below are
satisfied. Alternatively, closed-end fund shareholders who purchased such
shares on or after October 21, 1994 and wish to reinvest the net proceeds from
a sale of their closed-end fund shares are offered     
 
                                       21
<PAGE>
 
   
Class A shares (if eligible to purchase Class A shares) or Class D shares of
the Fund and other MLAM-advised mutual funds ("Eligible Class D shares"), if
the following conditions are met. First, the sale of closed-end fund shares
must be made through Merrill Lynch, and the net proceeds therefrom must be
immediately reinvested in Eligible Class A or Class D shares. Second, the
closed-end fund shares must either have been acquired in the initial public
offering or be shares representing dividends from shares of common stock
acquired in such offering. Third, the closed-end fund shares must have been
continuously maintained in a Merrill Lynch securities account. Fourth, there
must be a minimum purchase of $250 to be eligible for the investment option.
       
  Shareholders of certain MLAM-advised continuously offered closed-end funds
may reinvest at net asset value the net proceeds from a sale of certain shares
of common stock of such funds in shares of the Fund. Upon exercise of this
investment option, shareholders of Merrill Lynch Senior Floating Rate Fund,
Inc. will receive Class A shares of the Fund and shareholders of Merrill Lynch
Municipal Strategy Fund, Inc. and Merrill Lynch High Income Municipal Bond
Fund, Inc. will receive Class D shares of the Fund, except that shareholders
already owning Class A shares of the Fund will be eligible to purchase
additional Class A shares pursuant to this option, if such additional Class A
shares will be held in the same account as the existing Class A shares and the
other requirements pertaining to the reinvestment privilege are met. In order
to exercise this investment option, a shareholder of one of the above-
referenced continuously offered closed-end funds (an "eligible fund") must sell
his or her shares of common stock of the eligible fund (the "eligible shares")
back to the eligible fund in connection with a tender offer conducted by the
eligible fund and reinvest the proceeds immediately in the designated class of
shares of the Fund. This investment option is available only with respect to
eligible shares as to which no Early Withdrawal Charge or CDSC (each as defined
in the eligible fund's prospectus) is applicable. Purchase orders from eligible
fund shareholders wishing to exercise this investment option will be accepted
only on the day that the related tender offer terminates and will be effected
at the net asset value of the designated class of the Fund on such day.     
 
REDUCED INITIAL SALES CHARGES
 
  Right of Accumulation. Reduced sales charges are applicable through a right
of accumulation under which eligible investors are permitted to purchase shares
of the Fund subject to an initial sales charge at the offering price applicable
to the total of (a) the public offering price of the shares then being
purchased plus (b) an amount equal to the then current net asset value or cost,
whichever is higher, of the purchaser's combined holdings of all classes of
shares of the Fund and of other MLAM-advised mutual funds. For any such right
of accumulation to be made available, the Distributor must be provided at the
time of purchase, by the purchaser or the purchaser's securities dealer, with
sufficient information to permit confirmation of qualification. Acceptance of
the purchase order is subject to such confirmation. The right of accumulation
may be amended or terminated at any time. Shares held in the name of a nominee
or custodian under pension, profit-sharing, or other employee benefit plans may
not be combined with other shares to qualify for the right of accumulation.
 
  Letter of Intention. Reduced sales charges are applicable to purchases
aggregating $25,000 or more of the Class A or Class D shares of the Fund or any
MLAM-advised mutual funds made within a thirteen-month period starting with the
first purchase pursuant to a Letter of Intention in the form provided in the
Prospectus. The Letter of Intention is available only to investors whose
accounts are maintained at the Fund's
 
                                       22
<PAGE>
 
Transfer Agent. The Letter of Intention is not available to employee benefit
plans for which Merrill Lynch provides plan participant recordkeeping
services. The Letter of Intention is not a binding obligation to purchase any
amount of Class A or Class D shares; however, its execution will result in the
purchaser paying a lower sales charge at the appropriate quantity purchase
level. A purchase not originally made pursuant to a Letter of Intention may be
included under a subsequent Letter of Intention executed within 90 days of
such purchase if the Distributor is informed in writing of this intent within
such 90-day period. The value of Class A or Class D shares of the Fund and of
other MLAM-advised mutual funds presently held, at cost or maximum offering
price (whichever is higher), on the date of the first purchase under the
Letter of Intention, may be included as a credit toward the completion of such
Letter, but the reduced sales charge applicable to the amount covered by such
Letter will be applied only to new purchases. If the total amount of shares
does not equal the amount stated in the Letter of Intention (minimum of
$25,000), the investor will be notified and must pay, within 20 days of the
expiration of such Letter, the difference between the sales charge on the
Class A or Class D shares purchased at the reduced rate and the sales charge
applicable to the shares actually purchased through the Letter. Class A or
Class D shares equal to at least five percent of the intended amount will be
held in escrow during the thirteen-month period (while remaining registered in
the name of the purchaser) for this purpose. The first purchase under the
Letter of Intention must be at least five percent of the dollar amount of such
Letter. If during the term of such Letter, a purchase brings the total amount
invested to an amount equal to or in excess of the amount indicated in the
Letter, the purchaser will be entitled on that purchase and subsequent
purchases to that further reduced percentage sales charge, but there will be
no retroactive reduction of the sales charges on any previous purchase. The
value of any shares redeemed or otherwise disposed of by the purchaser prior
to termination or completion of the Letter of Intention will be deducted from
the total purchases made under such Letter. An exchange from a MLAM-advised
money market fund into the Fund that creates a sales charge will count toward
completing a new or existing Letter of Intention from the Fund.
   
  Employee Access Accounts SM Class A or Class D shares are offered at net
asset value to Employee Access Accounts available through qualified employers
that provide employer-sponsored retirement or savings plans that are eligible
to purchase such shares at net asset value. The initial minimum for such
accounts is $500, except that the initial minimum for shares purchased for
such accounts pursuant to the Automatic Investment Program is $50.     
 
  TMA SM Managed Trusts. Class A shares are offered at net asset value to
TMA SM Managed Trusts to which Merrill Lynch Trust Company provides
discretionary trustee services.
       
       
  Purchase Privilege of Certain Persons. Trustees of the Trust, members of the
Boards of other MLAM-advised investment companies, ML & Co. and its
subsidiaries (the term "subsidiaries", when used herein with respect to ML &
Co., includes MLAM, the Manager and certain other entities directly or
indirectly wholly-owned and controlled by ML & Co.) and their directors and
employees, and any trust, pension, profit-sharing or other benefit plan for
such persons, may purchase Class A shares of the Fund at net asset value.
 
  Class D shares of the Fund are offered at net asset value, without sales
charge, to an investor who has a business relationship with a financial
consultant who joined Merrill Lynch from another investment firm within six
months prior to the date of purchase by such investor, if the following
conditions are satisfied: first, the investor must advise Merrill Lynch that
it will purchase Class D shares of the Fund with proceeds from a redemption of
a mutual fund that was sponsored by the financial consultant's previous firm
and was
 
                                      23
<PAGE>
 
subject to a sales charge either at the time of purchase or on a deferred
basis; and second, the investor also must establish that such redemption had
been made within 60 days prior to the investment in the Fund, and the proceeds
from the redemption had been maintained in the interim in cash or a money
market fund.
 
  Class D shares of the Fund are also offered at net asset value, without sales
charge, to an investor who has a business relationship with a Merrill Lynch
financial consultant and who has invested in a mutual fund sponsored by a non-
Merrill Lynch company for which Merrill Lynch has served as a selected dealer
and where Merrill Lynch has either received or given notice that such
arrangement will be terminated ("notice"), if the following conditions are
satisfied: first, the investor must purchase Class D shares of the Fund with
proceeds from a redemption of shares of such other mutual fund and the shares
of such other fund were subject to a sales charge either at the time of
purchase or on a deferred basis; and second, such purchase of Class D shares
must be made within 90 days after such notice.
 
  Class D shares of the Fund are offered at net asset value, without a sales
charge, to an investor who has a business relationship with a Merrill Lynch
financial consultant and who has invested in a mutual fund for which Merrill
Lynch has not served as a selected dealer if the following conditions are
satisfied: first, the investor must advise Merrill Lynch that it will purchase
Class D shares of the Fund with proceeds from the redemption of shares of such
other mutual fund and that such shares have been outstanding for a period of no
less than six months; and second, such purchase of Class D shares must be made
within 60 days after the redemption and the proceeds from the redemption must
be maintained in the interim in cash or a money market fund.
 
  Acquisition of Certain Investment Companies. The public offering price of
Class D shares may be reduced to the net asset value per Class D share in
connection with the acquisition of the assets of or merger or consolidation
with a personal holding company or a public or private investment company. The
value of the assets or company acquired in a tax-free transaction may be
adjusted in appropriate cases to reduce possible adverse tax consequences to
the Fund which might result from an acquisition of assets having net unrealized
appreciation which is disproportionately higher at the time of acquisition than
the realized or unrealized appreciation of the Fund. The issuance of Class D
shares for consideration other than cash is limited to bona fide
reorganizations, statutory mergers or other acquisitions of portfolio
securities which (i) meet the investment objectives and policies of the Fund;
(ii) are acquired for investment and not for resale (subject to the
understanding that the disposition of the Fund's portfolio securities shall at
all times remain within its control); and (iii) are liquid securities, the
value of which is readily ascertainable, which are not restricted as to
transfer either by law or liquidity of market (except that the Fund may acquire
through such transactions restricted or illiquid securities to the extent the
Fund does not exceed the applicable limits on acquisition of such securities
set forth under "Investment Objective and Policies" herein).
 
  Reductions in or exemptions from the imposition of a sales load are due to
the nature of the investors and/or the reduced sales efforts that will be
needed in obtaining such investments.
 
DISTRIBUTION PLANS
 
  Reference is made to "Purchase of Shares--Distribution Plans" in the
Prospectus for certain information with respect to the separate distribution
plans for Class B, Class C and Class D shares pursuant to Rule 12b-1 under the
1940 Act (each at a "Distribution Plan") with respect to the account
maintenance and/or distribution fees paid by the Fund to the Distributor with
respect to such classes.
 
                                       24
<PAGE>
 
  Payments of the account maintenance and/or distribution fees are subject to
the provisions of Rule 12b-1 under the 1940 Act. Among other things, each
Distribution Plan provides that the Distributor shall provide and the Trustees
shall review quarterly reports of the disbursement of the account maintenance
fees and/or distribution fees paid to the Distributor. In their consideration
of each Distribution Plan, the Trustees must consider all factors they deem
relevant, including information as to the benefits of the Distribution Plan to
the Fund and its related class of shareholders. Each Distribution Plan further
provides that, so long as the Distribution Plan remains in effect, the
selection and nomination of Trustees who are not "interested persons" of the
Trust, as defined in the 1940 Act (the "Independent Trustees"), shall be
committed to the discretion of the Independent Trustees then in office. In
approving each Distribution Plan in accordance with Rule 12b-1, the Independent
Trustees concluded that there is reasonable likelihood that such Distribution
Plan will benefit the Fund and its related class of shareholders. Each
Distribution Plan can be terminated at any time, without penalty, by the vote
of a majority of the Independent Trustees or by the vote of the holders of a
majority of the outstanding related class of voting securities of the Fund. A
Distribution Plan cannot be amended to increase materially the amount to be
spent by the Fund without the approval of the related class of shareholders,
and all material amendments are required to be approved by the vote of
Trustees, including a majority of the Independent Trustees who have no direct
or indirect financial interest in such Distribution Plan, cast in person at a
meeting called for that purpose. Rule 12b-1 further requires that the Trust
preserve copies of such Distribution Plan and any report made pursuant to such
plan for a period of not less than six years from the date of such Distribution
Plan or such report, the first two years in an easily accessible place.
 
LIMITATIONS ON THE PAYMENT OF DEFERRED SALES CHARGES
   
  The maximum sales charge rule in the Conduct Rules of the National
Association of Securities Dealers, Inc. ("NASD") imposes a limitation on
certain asset-based sales charges such as the distribution fee and the
contingent deferred sales charge ("CDSC") borne by the Class B and Class C
shares but not the account maintenance fee. The maximum sales charge rule is
applied separately to each class. As applicable to the Fund, the maximum sales
charge rule limits the aggregate of distribution fee payments and CDSCs payable
by the Fund to (1) 6.25% of eligible gross sales of Class B shares and Class C
shares, computed separately (defined to exclude shares issued pursuant to
dividend reinvestments and exchanges), plus (2) interest on the unpaid balance
for the respective class, computed separately, at the prime rate plus 1% (the
unpaid balance being the maximum amount payable minus amounts received from the
payment of the distribution fee and the CDSC). In connection with the Class B
shares, the Distributor has voluntarily agreed to waive interest charges on the
unpaid balance in excess of 0.50% of eligible gross sales. Consequently, the
maximum amount payable to the Distributor (referred to as the "voluntary
maximum") in connection with the Class B shares is 6.75% of eligible gross
sales. The Distributor retains the right to stop waiving the interest charges
at any time. To the extent payments would exceed the voluntary maximum, the
Fund will not make further payments of the distribution fee with respect to
Class B shares, and any CDSCs will be paid to the Fund rather than to the
Distributor; however, the Fund will continue to make payments of the account
maintenance fee. In certain circumstances the amount payable pursuant to the
voluntary maximum may exceed the amount payable under the NASD formula. In such
circumstances payment in excess of the amount payable under the NASD formula
will not be made.     
   
  The following table sets forth comparative information as of July 31, 1996,
with respect to the Class B and Class C shares of the Fund indicating the
maximum allowable payments that can be made under the     
 
                                       25
<PAGE>
 
   
NASD maximum sales charge rule and, with respect to the Class B shares, the
Distributor's voluntary maximum.     
 
<TABLE>   
<CAPTION>
                                                 DATA CALCULATED AS OF JULY 31, 1996
                          ----------------------------------------------------------------------------------
                                                            (IN THOUSANDS)
CLASS B SHARES, FOR THE            ALLOWABLE  ALLOWABLE             AMOUNTS                     ANNUAL
 PERIOD MARCH 27, 1992    ELIGIBLE AGGREGATE INTEREST ON MAXIMUM   PREVIOUSLY   AGGREGATE    DISTRIBUTION
 (COMMENCEMENT             GROSS     SALES     UNPAID    AMOUNT     PAID TO      UNPAID   FEE AT CURRENT NET
 OF OPERATIONS) TO JULY   SALES(1)  CHARGES  BALANCE(2)  PAYABLE DISTRIBUTOR(3)  BALANCE    ASSET LEVEL(4)
 31, 1996:                -------- --------- ----------- ------- -------------- --------- ------------------
<S>                       <C>      <C>       <C>         <C>     <C>            <C>       <C>
Under NASD Rule as
 Adopted................  $65,556   $4,097     $1,231    $5,328       $927       $4,401          $122
Under Distributor's Vol-
 untary Waiver..........  $65,556   $4,097     $  328    $4,425       $927       $3,498          $122

CLASS C SHARES, FOR THE
 PERIOD OCTOBER 21, 1994
 (COMMENCEMENT OF
 OPERATIONS) TO JULY 31,
 1996:
Under NASD Rule as
 Adopted................  $ 1,217   $   76     $    6    $   82       $  4       $   78          $  4
</TABLE>    
- --------
   
(1) Purchase price of all eligible Class B or Class C shares sold during the
    periods indicated other than shares acquired through dividend reinvestment
    and the exchange privilege.     
(2) Interest is computed on a monthly basis based upon the prime rate, as
    reported in The Wall Street Journal, plus 1.0% as permitted under the NASD
    Rule.
(3) Consists of CDSC payments, distribution fee payments and accruals.
   
(4) Provided to illustrate the extent to which the current level of
    distribution fee payments (not including any CDSC payments) is amortizing
    the unpaid balance. No assurance can be given that payments of the
    distribution fee will reach either the voluntary maximum or the NASD
    maximum.     
 
                             REDEMPTION OF SHARES
 
  Reference is made to "Redemption of Shares" in the Prospectus for certain
information as to the redemption and repurchase of Fund shares.
   
  The right to redeem shares or to receive payment with respect to any such
redemption may be suspended only for any period during which trading on the
NYSE is restricted as determined by the Commission or the NYSE is closed
(other than customary weekend and holiday closings), for any period during
which an emergency exists as defined by the Commission as a result of which
disposal of portfolio securities or determination of the net asset value of
the Fund is not reasonably practicable, and for such other periods as the
Commission may by order permit for the protection of shareholders of the Fund.
    
DEFERRED SALES CHARGES--CLASS B AND CLASS C SHARES
   
  As discussed in the Prospectus under "Purchase of Shares--Deferred Sales
Charge Alternatives--Class B and Class C Shares", while Class B shares
redeemed within four years of purchase are subject to a CDSC under most
circumstances, the charge is waived on redemptions of Class B shares following
the death or disability of a Class B shareholder. Redemptions for which the
waiver applies are any partial or complete redemption following the death or
disability (as defined in the Code) of a Class B shareholder (including one
who owns the Class B shares as joint tenant with his or her spouse), provided
the redemption is requested within one year of the death or initial
determination of disability. For the fiscal years ended July 31, 1994, 1995
and 1996, the Distributor received CDSCs of $127,261, $133,898 and $58,961,
respectively, with respect to redemptions of Class B shares, all of which were
paid to Merrill Lynch. For the period October 21, 1994     
 
                                      26
<PAGE>
 
   
(commencement of operations) to July 31, 1995, the Distributor received no
CDSCs with respect to redemptions of Class C shares. For the fiscal year ended
July 31, 1996, the Distributor received CDSCs of $26 with respect to
redemptions of Class C shares, all of which were paid to Merrill Lynch.     
       
                             PORTFOLIO TRANSACTIONS
 
  Reference is made to "Investment Objective and Policies" and "Portfolio
Transactions" in the Prospectus.
   
  Under the 1940 Act, persons affiliated with the Trust are prohibited from
dealing with the Fund as a principal in the purchase and sale of securities
unless such trading is permitted by an exemptive order issued by the
Commission. Since over-the-counter transactions are usually principal
transactions, affiliated persons of the Trust, including Merrill Lynch, may not
serve as dealer in connection with transactions with the Fund. The Trust has
obtained an exemptive order permitting it to engage in certain principal
transactions with Merrill Lynch involving high quality short-term municipal
bonds subject to certain conditions. For the fiscal year ended July 31, 1994,
the Fund engaged in one such transaction in the amount of $1,500,000 pursuant
to such order. For the fiscal years ended July 31, 1995 and 1996, the Fund
engaged in no transactions pursuant to such order. Affiliated persons of the
Trust may serve as broker for the Fund in over-the-counter transactions
conducted on an agency basis. Certain court decisions have raised questions as
to the extent to which investment companies should seek exemptions under the
1940 Act in order to seek to recapture underwriting and dealer spreads from
affiliated entities. The Trustees have considered all factors deemed relevant
and have made a determination not to seek such recapture at this time. The
Trustees will reconsider this matter from time to time.     
 
  As a non-fundamental restriction, the Trust will prohibit the purchase or
retention by the Fund of the securities of any issuer if the officers and
Trustees of the Trust, the officers and general partner of the Manager, the
directors of such general partner or the officers and directors of any
subsidiary thereof each owning beneficially more than one-half of one per cent
of the securities of such issuer own in the aggregate more than five percent of
the securities of such issuer. In addition, under the 1940 Act, the Fund may
not purchase securities from any underwriting syndicate of which Merrill Lynch
is a member except pursuant to an exemptive order or rules adopted by the
Commission. Rule 10f-3 under the 1940 Act sets forth conditions under which the
Fund may purchase municipal bonds in such transactions. The rule sets forth
requirements relating to, among other things, the terms of an issue of
municipal bonds purchased by the Fund, the amount of municipal bonds which may
be purchased in any one issue and the assets of the Fund which may be invested
in a particular issue. The Trust has applied for an exemptive order permitting
it to, among other things, (i) purchase high quality tax-exempt securities from
Merrill Lynch when Merrill Lynch is a member of an underwriting syndicate and
(ii) purchase tax-exempt securities from and sell tax-exempt securities to
Merrill Lynch in secondary market transactions. Affiliated persons of the Trust
may serve as its broker in over-the-counter transactions conducted for the Fund
on an agency basis only.
 
  The Fund does not expect to use any particular dealer in the execution of
transactions but, subject to obtaining the best net results, dealers who
provide supplemental investment research (such as information
 
                                       27
<PAGE>
 
concerning tax-exempt securities, economic data and market forecasts) to the
Manager may receive orders for transactions by the Fund. Information so
received will be in addition to and not in lieu of the services required to be
performed by the Manager under its Management Agreement, and the expenses of
the Manager will not necessarily be reduced as a result of the receipt of such
supplemental information.
   
  The Trust has no obligation to deal with any broker in the execution of
transactions for the Fund's portfolio securities. In addition, consistent with
the Conduct Rules of the NASD and policies established by the Trustees of the
Trust, the Manager may consider sales of shares of the Fund as a factor in the
selection of brokers or dealers to execute portfolio transactions for the Fund.
       
  Generally, the Fund does not purchase securities for short-term trading
profits. However, the Fund may dispose of securities without regard to the time
they have been held when such action, for defensive or other reasons, appears
advisable to its Manager. The portfolio turnover rate is calculated by dividing
the lesser of purchases or sales of portfolio securities for the particular
fiscal year by the monthly average of the value of the portfolio securities
owned by the Fund during the particular fiscal year. For purposes of
determining this rate, all securities whose maturities at the time of
acquisition are one year or less are excluded. The portfolio turnover rates for
the fiscal years ended July 31, 1995 and 1996 were 22.36% and 53.99%,
respectively.     
 
  Section 11(a) of the Securities Exchange Act of 1934, as amended, generally
prohibits members of the U.S. national securities exchanges from executing
exchange transactions for their affiliates and institutional accounts which
they manage unless the member (i) has obtained prior express authorization from
the account to effect such transactions, (ii) at least annually furnishes the
account with a statement setting forth the aggregate compensation received by
the member in effecting such transactions, and (iii) complies with any rules
the Commission has prescribed with respect to the requirements of clauses (i)
and (ii). To the extent Section 11(a) would apply to Merrill Lynch acting as a
broker for the Fund in any of its portfolio transactions executed on any such
securities exchange of which it is a member, appropriate consents have been
obtained from the Fund and annual statements as to aggregate compensation will
be provided to the Fund.
 
                        DETERMINATION OF NET ASSET VALUE
   
  The net asset value of the shares of all classes of the Fund is determined by
the Manager once daily, Monday through Friday, as of 15 minutes after the close
of business on the NYSE (generally 4:00 P.M., New York time) on each day during
which the NYSE is open for trading. The NYSE is not open on New Year's Day,
Presidents' Day, Good Friday, Memorial Day, Independence Day, Labor Day,
Thanksgiving Day and Christmas Day. Net asset value per share is computed by
dividing the sum of the value of the securities held by the Fund plus any cash
or other assets minus all liabilities by the total number of shares outstanding
at such time, rounded to the nearest cent. Expenses, including the fees payable
to the Manager and any account maintenance and/or distribution fees, are
accrued daily. The per share net asset value of Class B, Class C and Class D
shares generally will be lower than the per share net asset value of Class A
shares reflecting the daily expense accruals of the account maintenance,
distribution and higher transfer agency fees applicable with respect to Class B
and Class C shares and the daily expense accruals of the account maintenance
fees applicable with respect to Class D shares; moreover the per share net
asset value of the Class B and Class C     
 
                                       28
<PAGE>
 
   
shares generally will be lower than the per share net asset value of Class D
shares, reflecting the daily expense accruals of the distribution fees, higher
account maintenance fees and higher transfer agency fees applicable with
respect to Class B and Class C shares of the Fund. It is expected, however,
that the per share net asset value of the four classes will tend to converge
(although not necessarily meet) immediately after the payment of dividends,
which will differ by approximately the amount of the expense accrual
differentials between the classes.     
 
  The Municipal Bonds and other portfolio securities in which the Fund invests
are traded primarily in over-the-counter municipal bond and money 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 from one or more dealers that make
markets in the securities. One bond is the "yield equivalent" of another bond
when, taking into account market price, maturity, coupon rate, credit rating
and ultimate return of principal, both bonds will theoretically produce an
equivalent return to the bondholder. Financial futures contracts and options
thereon, which are traded on exchanges, are valued at their settlement prices
as of the close of such exchanges. Short-term investments with a remaining
maturity of 60 days or less are valued on an amortized cost basis, 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 Trustees of the Trust, including valuations
furnished by a pricing service retained by the Trust, which may utilize a
matrix system for valuations. The procedures of the pricing service and its
valuations are reviewed by the officers of the Trust under the general
supervision of the Trustees.
 
                              SHAREHOLDER SERVICES
 
  The Trust offers a number of shareholder services described below which are
designed to facilitate investment in shares of the Fund. Full details as to
each of such services and copies of the various plans described below can be
obtained from the Trust, the Distributor or Merrill Lynch.
 
INVESTMENT ACCOUNT
 
  Each shareholder whose account is maintained at the Transfer Agent has an
Investment Account and will receive statements, at least quarterly, from the
Transfer Agent. These statements will serve as transaction confirmations for
automatic investment purchases and the reinvestment of ordinary income
dividends and long-term capital gains distributions. The statements will also
show any other activity in the account since the preceding statement.
Shareholders also will receive separate transaction confirmations for each
purchase or sale transaction other than automatic investment purchases and the
reinvestment of ordinary income dividends and long-term capital gain
distributions. A shareholder may make additions to his or her Investment
Account at any time by mailing a check directly to the Transfer Agent.
 
  Share certificates are issued only for full shares and only upon the specific
request of a shareholder who has an Investment Account. Issuance of
certificates representing all or only part of the full shares in an Investment
Account may be requested by a shareholder directly from the Transfer Agent.
 
 
                                       29
<PAGE>
 
  Shareholders considering transferring their Class A or Class D shares from
Merrill Lynch to another brokerage firm or financial institution should be
aware that, if the firm to which the Class A or Class D shares are to be
transferred will not take delivery of shares of the Fund, a shareholder either
must redeem the Class A or Class D shares (paying any applicable CDSC) so that
the cash proceeds can be transferred to the account at the new firm, or such
shareholder must continue to maintain an Investment Account at the Transfer
Agent for those Class A or Class D shares. Shareholders interested in
transferring their Class B or Class C shares from Merrill Lynch and who do not
wish to have an Investment Account maintained for such shares at the Transfer
Agent may request their new brokerage firm to maintain such shares in an
account registered in the name of the brokerage firm for the benefit of the
shareholder at the Transfer Agent. If the new brokerage firm is willing to
accommodate the shareholder in this manner, the shareholder must request that
he or she be issued certificates for his or her shares, and then must turn the
certificates over to the new firm for re-registration as described in the
preceding sentence.
 
AUTOMATIC INVESTMENT PLANS
   
  A shareholder may make additions to an Investment Account at any time by
purchasing Class A shares (if he or she is an eligible Class A investor as
described in the Prospectus) or Class B, Class C or Class D shares at the
applicable public offering price either through the shareholder's securities
dealer or by mail directly to the Transfer Agent, acting as agent for such
securities dealers. Voluntary accumulation also can be made through a service
known as the Fund's Automatic Investment Plan whereby the Fund is authorized
through pre-authorized checks or automated clearing house debits of $50 or more
to charge the regular bank account of the shareholder on a regular basis to
provide systematic additions to the Investment Account of such shareholder.
Alternatively, investors who maintain CMA(R) or CBA(R) accounts may arrange to
have periodic investments made in the Fund, in their CMA (R) or CBA (R) account
or in certain related accounts in amounts of $100 or more through the CMA (R)
or CBA (R) Automated Investment Program.     
 
AUTOMATIC REINVESTMENT OF DIVIDENDS AND CAPITAL GAINS DISTRIBUTIONS
   
  Unless specific instructions are given as to the method of payment of
dividends and capital gains distributions, dividends and distributions will be
automatically reinvested in additional shares of the Fund. Such reinvestment
will be at the net asset value of shares of the Fund as of the close of
business on the monthly payment date for such dividends and distributions.
Shareholders may elect in writing to receive either their income dividends or
capital gains distributions, or both, in cash, in which event payment will be
mailed on or about the payment date.     
 
  Shareholders may, at any time, notify the Transfer Agent in writing or by
telephone (1-800-MER-FUND) that they no longer wish to have their dividends
and/or capital gains distributions reinvested in shares of the Fund or vice
versa and, commencing ten days after the receipt by the Transfer Agent of such
notice, such instructions will be effected.
 
SYSTEMATIC WITHDRAWAL PLANS--CLASS A AND CLASS D SHARES
 
  A Class A and Class D shareholder may elect to make systematic withdrawals
from an Investment Account on either a monthly or quarterly basis as provided
below. Quarterly withdrawals are available for
 
                                       30
<PAGE>
 
shareholders who have acquired Class A or Class D shares of the Fund having a
value, based on cost or the current offering price, of $5,000 or more, and
monthly withdrawals are available for shareholders with Class A or Class D
shares with such a value of $10,000 or more.
   
  At the time of each withdrawal payment, sufficient Class A or Class D shares
are redeemed from those on deposit in the shareholder's account to provide the
withdrawal payment specified by the shareholder. The shareholder may specify
either a dollar amount or a percentage of the value of his Class A or Class D
shares. Redemptions will be made at net asset value as determined 15 minutes
after the close of business on the NYSE (generally 4:00 P.M., New York time)
on the 24th day of each month or the 24th day of the last month of each
quarter, whichever is applicable. If the NYSE is not open for business on such
date, the Class A or Class D shares will be redeemed at the close of business
on the following business day. The check for the withdrawal payment will be
mailed, or the direct deposit for the withdrawal payment will be made, on the
next business day following redemption. When a shareholder is making
systematic withdrawals, dividends and distributions on all Class A or Class D
shares in the Investment Account are reinvested automatically in the Fund's
Class A or Class D shares, respectively. A shareholder's Systematic Withdrawal
Plan may be terminated at any time, without charge or penalty, by the
shareholder, the Trust, the Transfer Agent or the Distributor. Withdrawal
payments should not be considered as dividends, yield or income. Each
withdrawal is a taxable event. If periodic withdrawals continuously exceed
reinvested dividends, the shareholder's original investment may be reduced
correspondingly. Purchases of additional Class A or Class D shares concurrent
with withdrawals are ordinarily disadvantageous to the shareholder because of
sales charges and tax liabilities. The Trust will not knowingly accept
purchase orders for Class A or Class D shares of the Fund from investors who
maintain a Systematic Withdrawal Plan unless such purchase is equal to at
least one year's scheduled withdrawals or $1,200, whichever is greater.
Periodic investments may not be made into an Investment Account in which the
shareholder has elected to make systematic withdrawals.     
   
  Alternatively, a Class A or Class D shareholder whose shares are held within
a CMA(R) or CBA(R) Account may elect to have shares redeemed on a monthly,
bimonthly, quarterly, semiannual or annual basis through the CMA(R) or CBA(R)
Systematic Redemption Program. The minimum fixed dollar amount redeemable is
$25. The proceeds of systematic redemptions will be posted to the
shareholder's account three business days after the date the shares are
redeemed. Monthly systematic redemptions will be made at net asset value on
the first Monday of each month, bimonthly systematic redemptions will be made
at net asset value on the first Monday of every other month, and quarterly,
semiannual or annual redemptions are made at net asset value on the first
Monday of months selected at the shareholder's option. If the first Monday of
the month is a holiday, the redemption will be processed at net asset value on
the next business day. The Systematic Redemption Program is not available if
Fund shares are being purchased within the account pursuant to the Automatic
Investment Program. For more information on the CMA(R) or CBA(R) Systematic
Redemption Program, eligible shareholders should contact their Financial
Consultant.     
 
EXCHANGE PRIVILEGE
   
  Shareholders of each class of shares of the Fund have an exchange privilege
with certain other MLAM-advised mutual funds. Under the Merrill Lynch Select
Pricing SM System, Class A shareholders may exchange Class A shares of the
Fund for Class A shares of a second MLAM-advised mutual fund if the
shareholder holds any Class A shares of the second fund in his account in
which the exchange is made at the time of the     
 
                                      31
<PAGE>
 
   
exchange or is otherwise eligible to purchase Class A shares of the second
fund. If the Class A shareholder wants to exchange Class A shares for shares of
a second MLAM-advised mutual fund, and the shareholder does not hold Class A
shares of the second fund in his account at the time of the exchange and is not
otherwise eligible to acquire Class A shares of the second fund, the
shareholder will receive Class D shares of the second fund as a result of the
exchange. Class D shares also may be exchanged for Class A shares of a second
MLAM-advised mutual fund at any time as long as, at the time of the exchange,
the shareholder holds Class A shares of the second fund in the account in which
the exchange is made or is otherwise eligible to purchase Class A shares of the
second fund. Class B, Class C and Class D shares are exchangeable with shares
of the same class of other MLAM-advised mutual funds. For purposes of computing
the CDSC that may be payable upon a disposition of the shares acquired in the
exchange, the holding period for the previously owned shares of the Fund is
"tacked" to the holding period for the newly acquired shares of the other Fund
as more fully described below. Class A, Class B, Class C and Class D shares are
also exchangeable for shares of certain MLAM-advised money market funds as
follows: Class A shares may be exchanged for shares of Merrill Lynch Ready
Assets Trust, Merrill Lynch Retirement Reserves Money Fund (available only for
exchanges within certain retirement plans), Merrill Lynch U.S.A. Government
Reserves and Merrill Lynch U.S. Treasury Money Fund; Class B, Class C and Class
D shares may be exchanged for shares of Merrill Lynch Government Fund, Merrill
Lynch Institutional Fund, Merrill Lynch Institutional Tax-Exempt Fund and
Merrill Lynch Treasury Fund. Shares with a net asset value of at least $100 are
required to qualify for the exchange privilege, and any shares utilized in an
exchange must have been held by the shareholder for 15 days. It is contemplated
that the exchange privilege may be applicable to other new mutual funds whose
shares may be distributed by the Distributor.     
   
  Exchanges of Class A or Class D shares outstanding ("outstanding Class A or
Class D shares") for Class A or Class D shares of another MLAM-advised mutual
fund ("new Class A or Class D shares") are transacted on the basis of relative
net asset value per Class A or Class D share, respectively, plus an amount
equal to the difference, if any, between the sales charge previously paid on
the outstanding Class A or Class D shares and the sales charge payable at the
time of the exchange on the new Class A or Class D shares. With respect to
outstanding Class A or Class D shares as to which previous exchanges have taken
place, the "sales charge previously paid" shall include the aggregate of the
sales charges paid with respect to such Class A or Class D shares in the
initial purchase and any subsequent exchange. Class A or Class D shares issued
pursuant to dividend reinvestment are sold on a no-load basis in each of the
funds offering Class A or Class D shares. For purposes of the exchange
privilege, Class A or Class D shares acquired through dividend reinvestment
shall be deemed to have been sold with a sales charge equal to the sales charge
previously paid on the Class A or Class D shares on which the dividend was
paid. Based on this formula, Class A or Class D shares generally may be
exchanged into the Class A or Class D shares of the other funds or into shares
of certain money market funds without a sales charge.     
 
  In addition, each of the funds with Class B and Class C shares outstanding
("outstanding Class B or Class C shares") offers to exchange its Class B or
Class C shares for Class B or Class C shares, respectively, of any of another
MLAM-advised mutual fund ("new Class B or Class C shares") on the basis of
relative net asset value per Class B or Class C share, without the payment of
any CDSC that might otherwise be due on redemption of the outstanding shares.
Class B shareholders of the Fund exercising the exchange privilege will
continue to be subject to the Fund's CDSC schedule if such schedule is higher
than the CDSC schedule relating to the new Class B shares acquired through use
of the exchange privilege. In addition, Class B shares
 
                                       32
<PAGE>
 
of the Fund acquired through use of the exchange privilege will be subject to
the Fund's CDSC schedule if such schedule is higher than the CDSC schedule
relating to the Class B shares of the fund from which the exchange has been
made. For purposes of computing the sales charge that may be payable on a
disposition of the new Class B or Class C shares, the holding period for the
outstanding Class B or Class C shares is "tacked" to the holding period of the
new Class B or Class C shares. For example, an investor may exchange Class B
shares of the Fund for those of Merrill Lynch Special Value Fund, Inc.
("Special Value Fund") after having held the Fund's Class B shares for two and
a half years. The 2% CDSC that generally would apply to a redemption would not
apply to the exchange. Three years later the investor may decide to redeem the
Class B shares of Special Value Fund and receive cash. There will be no CDSC
due on this redemption, since by "tacking" the two and a half year holding
period of the Fund's Class B shares to the three year holding period for the
Special Value Fund Class B shares, the investor will be deemed to have held the
new Class B shares for more than five years.
   
  Shareholders also may exchange shares of the Fund into shares of certain
money market funds advised by the Manager or its affiliates, but the period of
time that Class B or Class C shares are held in a money market fund will not
count towards satisfaction of the holding period requirement for purposes of
reducing the CDSC, or with respect to Class B shares, towards satisfaction of
the conversion period. However, shares of a money market fund which were
acquired as a result of an exchange for Class B or Class C shares of the Fund
may, in turn, be exchanged back into Class B or Class C shares, respectively,
of any fund offering such shares, in which event the holding period for Class B
or Class C shares of the newly-acquired fund will be aggregated with previous
holding periods for purposes of reducing the CDSC. Thus, for example, an
investor may exchange Class B shares of the Fund for shares of Merrill Lynch
Institutional Fund after having held the Fund Class B shares for two and a half
years and three years later decide to redeem the shares of Merrill Lynch
Institutional Fund for cash. At the time of this redemption, the 2% CDSC that
would have been due had the Class B shares of the Fund been redeemed for cash
rather than exchanged for shares of Merrill Lynch Institutional Fund will be
payable. If, instead of such redemption the shareholder exchanged such shares
for Class B shares of a fund which the shareholder continued to hold for an
additional two and a half years, any subsequent redemption would not incur a
CDSC.     
       
       
  Before effecting an exchange, shareholders should obtain a currently
effective prospectus of the fund into which the exchange is to be made.
   
  To exercise the exchange privilege, a shareholder should contact his or her
Merrill Lynch Financial Consultant, who will advise the Fund of the exchange.
Shareholders of the Fund, and shareholders of the other funds described above
with shares for which certificates have not been issued, may exercise the
exchange privilege by wire through their securities dealers. The Fund reserves
the right to require a properly completed Exchange Application. This exchange
privilege may be modified or terminated at any time in accordance with the
rules of the Commission. The Fund reserves the right to limit the number of
times an investor may exercise the exchange privilege. Certain funds may
suspend the continuous offering of their shares to the general public at any
time and may thereafter resume such offering from time to time. The exchange
privilege is available only to U.S. Shareholders in states where the exchange
legally may be made.     
 
 
                                       33
<PAGE>
 
                            DISTRIBUTIONS AND TAXES
   
  The Trust intends to continue to qualify the Fund for the special tax
treatment afforded regulated investment companies ("RICs") under the Internal
Revenue Code of 1986, as amended (the "Code"). If it so qualifies, the Fund
(but not its shareholders) will not be subject to Federal income tax to the
extent that it distributes its net investment income and net realized capital
gains. The Trust intends to cause the Fund to distribute substantially all of
such income.     
 
  As discussed in the Fund's Prospectus, the Trust has established other series
in addition to the Fund (together with the Fund, the "Series"). Each Series of
the Trust is treated as a separate corporation for Federal income tax purposes.
Each Series, therefore, is considered to be a separate entity in determining
its treatment under the rules for RICs described in the Prospectus. Losses in
one Series do not offset gains in another Series, and the requirements (other
than certain organizational requirements) for qualifying for RIC status are
determined at the Series level rather than at the Trust level.
 
  The Code requires a RIC to pay a nondeductible 4% excise tax to the extent
the RIC does not distribute, during each calendar year, 98% of its ordinary
income, determined on a calendar year basis, and 98% of its capital gains,
determined, in general, on an October 31 year end, plus certain undistributed
amounts from previous years. The required distributions, however, are based
only on the taxable income of a RIC. The excise tax, therefore, generally will
not apply to the tax-exempt income of a RIC, such as the Fund, that pays
exempt-interest dividends.
   
  The Trust intends to qualify the Fund to pay "exempt-interest dividends" as
defined in Section 852(b)(5) of the Code. Under such section if, at the close
of each quarter of the Fund's taxable year, at least 50% of the value of the
Fund's total assets consists of obligations exempt from Federal income tax
("tax-exempt obligations") under Section 103(a) of the Code (relating generally
to obligations of a state or local governmental unit), the Fund shall be
qualified to pay exempt-interest dividends to its Class A, Class B, Class C and
Class D shareholders (together, the "shareholders"). Exempt-interest dividends
are dividends or any part thereof paid by the Fund which are attributable to
interest on tax-exempt obligations and designated by the Trust as exempt-
interest dividends in a written notice mailed to the Fund's shareholders within
60 days after the close of the Fund's taxable year. For this purpose, the Fund
will allocate interest from tax-exempt obligations (as well as ordinary income,
capital gains and tax preference items, discussed below) among the Class A,
Class B, Class C and Class D shareholders according to a method (which it
believes is consistent with the Commission rule permitting the issuance and
sale of multiple classes of shares) that is based on the gross income allocable
to Class A, Class B, Class C and Class D shareholders during the taxable year,
or such other method as the Internal Revenue Service may prescribe. To the
extent that the dividends distributed to the Fund's shareholders are derived
from interest income exempt from Federal income tax under Code Section 103(a)
and are properly designated as exempt-interest dividends, they will be
excludable from a shareholder's gross income for Federal income tax purposes.
Exempt-interest dividends are included, however, in determining the portion, if
any, of a person's social security and railroad retirement benefits subject to
Federal income and Minnesota personal income taxes. Shareholders are advised to
consult their tax advisers with respect to whether exempt-interest dividends
retain the exclusion under Code Section 103(a)     
 
                                       34
<PAGE>
 
if such shareholder would be treated as a "substantial user" or "related
person" under Code Section 147(a) with respect to property financed with the
proceeds of an issue of "industrial development bonds" or "private activity
bonds," if any, held by the Fund.
 
  Subject to the preceding paragraph, the portion of the Fund's exempt-interest
dividends that is derived from interest income on Minnesota Municipal Bonds is
excluded from the Minnesota taxable net income of individuals, estates and
trusts, provided that the portion of the exempt-interest dividends from such
Minnesota sources paid to all shareholders represents 95% or more of the
exempt-interest dividends paid by the Fund. Also excluded from the Minnesota
taxable net income of individuals, estates and trusts are dividends that are
directly attributable to interest on obligations of the Government of Puerto
Rico, the Territory of Guam and certain other territories and possessions of
the United States. Shareholders subject to income taxation by states other than
Minnesota will realize a lower after tax rate of return than Minnesota
shareholders since the dividends distributed by the Fund generally will not be
exempt, to any significant degree, from income taxation by such other states.
The Trust will inform shareholders annually regarding the portion of the Fund's
distributions which constitutes exempt-interest dividends and the portion which
is exempt from Minnesota personal income taxes. The Fund will allocate exempt-
interest dividends among Class A, Class B, Class C and Class D shareholders for
Minnesota income tax purposes based on a method similar to that described above
for Federal income tax purposes. Interest on indebtedness incurred or continued
to purchase or carry shares of a RIC paying exempt-interest dividends, such as
the Fund, will not be deductible by the investor for Federal income and
Minnesota personal income tax purposes.
   
  Exempt-interest dividends are not excluded from the Minnesota taxable income
of corporations and financial institutions. Distributions from investment
income and capital gains of the Fund, including exempt-interest dividends, will
be subject to Minnesota corporate franchise tax, state taxes in states other
than Minnesota and local taxes in cities other than those in Minnesota.
Accordingly, investors in the Fund, including, in particular, corporate
investors which may be subject to the Minnesota corporate franchise tax, should
consult their tax advisors with respect to the application of such taxes to an
investment in the Fund and to the receipt of Fund dividends and as to their
Minnesota tax situation in general.     
   
  The 1995 Minnesota Legislature enacted a statement of intent that interest on
obligations of Minnesota governmental units and Indian tribes be included in
net income of individuals, estates and trusts for Minnesota income tax purposes
if a court determines that Minnesota's exemption of such interest unlawfully
discriminates against interstate commerce because interest on obligations of
governmental issuers located in other states is so included. This provision
applies to taxable years that begin during or after the calendar year in which
any such court decision becomes final, irrespective of the date on which the
obligations were issued. The Fund is not aware of any judicial decision holding
that a state's exemption of interest on its own bonds or those of its political
subdivisions or Indian tribes, but not of interest on the bonds of other states
or their political subdivisions or Indian tribes, unlawfully discriminates
against interstate commerce or otherwise contravenes the United States
Constitution. Nevertheless, the Fund cannot predict the likelihood that
interest on the Minnesota Bonds held by the Fund would become taxable under
this Minnesota statutory provision.     
       
  To the extent that the Fund's distributions are derived from interest on its
taxable investments (including, in the case of Minnesota tax law, interest on
Municipal Bonds of other states) or from an excess of net short-term capital
gains over net long-term capital losses ("ordinary income dividends"), such
 
                                       35
<PAGE>
 
   
distributions are considered ordinary income for Federal and Minnesota income
tax purposes, except, in the case of Minnesota personal income tax, for
dividends that are directly attributable to interest on obligations of the
United States Government. Distributions, if any, from an excess of net long-
term capital gains over net short-term capital losses derived from the sale of
securities or from certain transactions in futures or options ("capital gain
dividends") are taxable as long-term capital gains for Federal income tax
purposes, regardless of the length of time the shareholder has owned Fund
shares. Such capital gain dividends also are subject to the Minnesota personal
income and corporate franchise taxes. Distributions by the Fund whether from
exempt-interest income, ordinary income or capital gains, will not be eligible
for the dividends received deduction allowed to corporations under the Code.
       
  All or a portion of the Fund's gain from the sale or redemption of tax-exempt
obligations purchased at a market discount will be treated as ordinary income
rather than capital gain. This rule may increase the amount of ordinary income
dividends received by shareholders. Distributions in excess of the Fund's
earnings and profits will first reduce the adjusted tax basis of a holder's
shares and, after such adjusted tax basis is reduced to zero, will constitute
capital gains to such holder (assuming the shares are held as a capital asset).
Any loss upon the sale or exchange of Fund shares held for six months or less
will be disallowed for both Federal income and Minnesota personal income and
corporate franchise tax purposes to the extent of any exempt-interest dividends
received by the shareholder, even, in the case of Minnesota taxes, where all or
a portion of such dividends is not excluded from Minnesota taxable income. In
addition, any such loss that is not disallowed under the rule stated above will
be treated as long-term capital loss to the extent of any capital gain
dividends received by the shareholder. If the Fund pays a dividend in January
which was declared in the previous October, November or December to
shareholders of record on a specified date in one of such months, then such
dividend will be treated for tax purposes as being paid by the Fund and
received by its shareholders on December 31 of the year in which such dividend
was declared.     
   
  The Code subjects interest received on certain otherwise tax-exempt
securities to an alternative minimum tax. The alternative minimum tax applies
to interest received on certain "private activity bonds" issued after August 7,
1986. Private activity bonds are bonds which, although tax-exempt, are used for
purposes other than those generally performed by governmental units and which
benefit non-governmental entities (e.g., bonds used for industrial development
or housing purposes). Income received on such bonds is classified as an item of
"tax preference," which could subject certain investors in such bonds,
including shareholders of the Fund, to an alternative minimum tax. The Fund
will purchase such "private activity bonds" and the Trust will report to
shareholders within 60 days after the Fund's taxable year-end the portion of
the Fund's dividends declared during the year which constitutes an item of tax
preference for alternative minimum tax purposes. The Code further provides that
corporations are subject to an alternative minimum tax based, in part, on
certain differences between taxable income as adjusted for other tax
preferences and the corporation's "adjusted current earnings", which more
closely reflect a corporation's economic income. Because an exempt-interest
dividend paid by the Fund will be included in adjusted current earnings, a
corporate shareholder may be required to pay alternative minimum tax on exempt-
interest dividends paid by the Fund. Exempt-interest dividends attributable to
interest on certain private activity bonds issued after August 7, 1986, also
will be included in Minnesota alternative minimum taxable income of
individuals, estates and trusts for purposes of computing Minnesota's
alternative minimum tax.     
   
  The Fund may invest in high yield securities, as described in the Prospectus.
Furthermore, the Fund may also invest in instruments the return on which
includes nontraditional features such as indexed principal     
 
                                       36
<PAGE>
 
   
or interest payments ("nontraditional instruments"). These instruments may be
subject to special tax rules under which the Fund may be required to accrue and
distribute income before amounts due under the obligations are paid. In
addition, it is possible that all or a portion of the interest payments on such
high yield securities and/or nontraditional instruments could be
recharacterized as taxable ordinary income.     
 
  No gain or loss will be recognized by Class B shareholders on the conversion
of their Class B shares into Class D shares. A shareholder's basis in the Class
D shares acquired will be the same as such shareholder's basis in the Class B
shares converted, and the holding period of the acquired Class D shares will
include the holding period for the converted Class B shares.
 
  If a shareholder exercises an exchange privilege within 90 days of acquiring
the shares, then the loss the shareholder can recognize on the exchange will be
reduced (or the gain increased) to the extent any sales charge paid to the Fund
on the exchanged shares reduces any sales charge such shareholder would have
owed upon purchase of the new shares in the absence of the exchange privilege.
Instead, such sales charge will be treated as an amount paid for the new
shares.
 
  Under certain provisions of the Code, some shareholders may be subject to a
31% withholding tax on certain ordinary income dividends and on capital gain
dividends and redemption payments ("backup withholding"). Generally,
shareholders subject to backup withholding will be those for whom no certified
taxpayer identification number is on file with the Trust or who, to the Trust's
knowledge, have furnished an incorrect number. When establishing an account, an
investor must certify under penalty of perjury that such number is correct and
that such investor is not otherwise subject to backup withholding.
 
  A loss realized on a sale or exchange of shares of the Fund will be
disallowed if other Fund shares are acquired (whether through the automatic
reinvestment of dividends or otherwise) within a 61-day period beginning 30
days before and ending 30 days after the date that the shares are disposed of.
In such a case, the basis of the shares acquired will be adjusted to reflect
the disallowed loss.
   
  Ordinary income dividends paid to shareholders who are nonresident aliens or
foreign entities will be subject to a 30% United States withholding tax under
existing provisions of the Code applicable to foreign individuals and entities
unless a reduced rate of withholding or a withholding exemption is provided
under applicable treaty law. Nonresident shareholders are urged to consult
their own tax advisors concerning the applicability of the United States
withholding tax.     
 
  The Code provides that every person required to file a tax return must
include for information purposes on such return the amount of exempt-interest
dividends received from all sources (including the Fund) during the taxable
year.
 
ENVIRONMENTAL TAX
   
  The Code previously imposed a deductible tax (the "Environmental Tax") on a
corporation's modified alternative minimum taxable income (computed without
regard to the alternative tax net operating loss deduction and the deduction
for the Environmental Tax) at a rate of $12 per $10,000 (0.12%) of alternative
minimum taxable income in excess of $2,000,000. The Environmental Tax has
expired for tax years beginning after December 31, 1995, but may be reinstated
in the future. The Environmental Tax was imposed even if     
 
                                       37
<PAGE>
 
   
the corporation was not required to pay an alternative minimum tax because the
corporation's regular income tax liability exceeded its minimum tax liability.
The Code provides, however, that a RIC, such as the Fund, would not be subject
to the Environmental Tax. However, exempt-interest dividends paid by the Fund
that create alternative minimum taxable income for corporate shareholders (as
described above) could subject corporate shareholders of the Fund to the
Environmental Tax.     
 
TAX TREATMENT OF OPTION AND FUTURES TRANSACTIONS
 
  The Fund may purchase or sell municipal bond index futures contracts and
interest rate futures contracts on U.S. Government securities ("financial
futures contracts"). The Fund may also purchase and write call and put options
on such financial futures contracts. In general, unless an election is
available to the Fund or an exception applies, such options and financial
futures contracts that are "Section 1256 contracts" will be "marked to market"
for Federal income tax purposes at the end of each taxable year, i.e., each
such option or financial futures contract will be treated as sold for its fair
market value on the last day of the taxable year and any gain or loss
attributable to Section 1256 contracts will be 60% long-term and 40% short-term
capital gain or loss. Application of these rules to Section 1256 contracts held
by the Fund may alter the timing and character of distributions to
shareholders. The mark-to-market rules outlined above, however, will not apply
to certain transactions entered into by the Fund solely to reduce the risk of
changes in price or interest rates with respect to its investments.
   
  Code Section 1092, which applies to certain "straddles," may affect the
taxation of the Fund's sales of securities and transactions in financial
futures contracts and related options. Under Section 1092, the Fund may be
required to postpone recognition for tax purposes of losses incurred in certain
sales of securities and certain closing transactions in financial futures
contracts or the related options.     
 
  One of the requirements for qualification as a RIC is that less than 30% of
the Fund's gross income be derived from gains from the sale or other
disposition of securities held for less than three months. Accordingly, the
Fund may be restricted in effecting closing transactions within three months
after entering into an option or financial futures contract.
 
                               ----------------
 
  The foregoing is a general and abbreviated summary of the applicable
provisions of the Code, Treasury regulations and Minnesota tax laws presently
in effect. For the complete provisions, reference should be made to the
pertinent Code sections, the Treasury regulations promulgated thereunder and
the applicable Minnesota tax laws. The Code and the Treasury regulations, as
well as the Minnesota tax laws, are subject to change by legislative, judicial
or administrative action either prospectively or retroactively.
   
  Shareholders are urged to consult their own tax advisors regarding the
availability of any exemptions from state or local taxes (other than those
imposed by Minnesota) and with specific questions as to Federal, foreign, state
or local taxes.     
 
 
                                       38
<PAGE>
 
                                PERFORMANCE DATA
 
  From time to time the Fund may include its average annual total return and
other total return data, as well as yield and tax-equivalent yield, in
advertisements or information furnished to present or prospective shareholders.
From time to time, the Fund may include the Fund's Morningstar risk-adjusted
performance ratings in advertisements or supplemental sales literature. Total
return and yield and tax-equivalent yield figures are based on the Fund's
historical performance and are not intended to indicate future performance.
Average annual total return, yield and tax-equivalent yield are determined
separately for Class A, Class B, Class C and Class D shares in accordance with
formulas specified by the Commission.
 
  Average annual total return quotations for the specified periods are computed
by finding the average annual compounded rates of return (based on net
investment income and any realized and unrealized capital gains or losses on
portfolio investments over such periods) that would equate the initial amount
invested to the redeemable value of such investment at the end of each period.
Average annual total return is computed assuming all dividends and
distributions are reinvested and taking into account all applicable recurring
and nonrecurring expenses, including the maximum sales charge in the case of
Class A and Class D shares and the CDSC that would be applicable to a complete
redemption of the investment at the end of the specified period in the case of
the Class B and Class C shares.
 
  The Fund also may quote annual, average annual and annualized total return
and aggregate total return performance data, both as a percentage and as a
dollar amount based on a hypothetical $1,000 investment, for various periods
other than those noted below. Such data will be computed as described above,
except that (1) as required by the periods of the quotations, actual annual,
annualized or aggregate data, rather than average annual data, may be quoted
and (2) the maximum applicable sales charges will not be included with respect
to annual or annualized rates of return calculations. Aside from the impact on
the performance data calculations of including or excluding the maximum
applicable sales charges, actual annual or annualized total return data
generally will be lower than average annual total return data since the average
rates of return reflect compounding of return; aggregate total return data
generally will be higher than average annual total return data since the
aggregate rates of return reflect compounding over a longer period of time.
 
                                       39
<PAGE>
 
  Set forth below is the total return, yield and tax equivalent yield
information for Class A, Class B, Class C and Class D shares of the Fund for
the periods indicated.
 
<TABLE>   
<CAPTION>
                          CLASS A SHARES                  CLASS B SHARES                  CLASS C SHARES          
                  ------------------------------- ------------------------------- ------------------------------- 
                                     REDEEMABLE                      REDEEMABLE                      REDEEMABLE   
                                     VALUE OF A                      VALUE OF A                      VALUE OF A   
                    EXPRESSED AS    HYPOTHETICAL    EXPRESSED AS    HYPOTHETICAL    EXPRESSED AS    HYPOTHETICAL  
                    A PERCENTAGE       $1,000       A PERCENTAGE       $1,000       A PERCENTAGE       $1,000     
                     BASED ON A      INVESTMENT      BASED ON A      INVESTMENT      BASED ON A      INVESTMENT   
                    HYPOTHETICAL    AT THE END OF   HYPOTHETICAL    AT THE END OF   HYPOTHETICAL    AT THE END OF 
     PERIOD       $1,000 INVESTMENT  THE PERIOD   $1,000 INVESTMENT  THE PERIOD   $1,000 INVESTMENT  THE PERIOD   
     ------       ----------------- ------------- ----------------- ------------- ----------------- ------------- 
                                                                    AVERAGE ANNUAL TOTAL RETURN                   
                                                            (including maximum applicable sales charge) 
<S>               <C>               <C>           <C>               <C>           <C>               <C>           
One year ended                                                                                                    
July 31, 1996...        0.78%         $1,007.80         0.45%         $1,004.50         3.33%         $1,033.30   
Inception (March                                                                                                  
27, 1992) to                                                                                                      
July 31, 1996...        5.64%         $1,269.50         6.10%         $1,293.50                                   
Inception                                                                                                         
(October 21,                                                                                                      
1994) to July                                                                                                     
31, 1996........                                                                        6.46%         $1,117.70   
                                                                        ANNUAL TOTAL RETURN                       
                                                            (excluding maximum applicable sales charge) 
Year ended July                                                                                                   
31, 1996........        4.98%         $1,049.80         4.44%         $1,044.40         4.33%         $1,043.30   
Year ended July                                                                                                   
31, 1995........        5.44%         $1,054.40         4.91%         $1,049.10                                   
Year ended July                                                                                                   
31, 1994........        1.87%         $1,018.70         1.35%         $1,013.50                                   
Year ended July                                                                                                   
31, 1993........        8.71%         $1,087.10         8.16%         $1,081.60                                   
Inception (March                                                                                                  
27, 1992) to                                                                                                      
July 31, 1992...        7.88%         $1,078.80         7.69%         $1,076.90                                   
Inception                                                                                                         
(October 21,                                                                                                      
1994) to July                                                                                                     
31, 1995........                                                                        7.13%         $1,071.30   
                                                                      AGGREGATE TOTAL RETURN                      
                                                            (including maximum applicable sales charge)  
Inception (March                                                                                                  
27, 1992) to                                                                                                      
July 31, 1996...       26.95%         $1,269.50        29.35%         $1,293.50                                   
Inception (Octo-                                                                                                  
ber 21, 1994) to                                                                                                  
July 31, 1996...                                                                       11.77%         $1,117.70   
                                                                               YIELD  
30 days ended                                                                                                     
July 31, 1996...        4.50%                           4.18%                           4.08%                     
                                                                       TAX-EQUIVALENT YIELD*  
30 days ended                                                                                                     
July 31, 1996...        6.25%                           5.81%                           5.67%                     

<CAPTION>
                           CLASS D SHARES
                   -------------------------------
                                      REDEEMABLE
                                      VALUE OF A
                     EXPRESSED AS    HYPOTHETICAL
                     A PERCENTAGE       $1,000
                      BASED ON A      INVESTMENT
                     HYPOTHETICAL    AT THE END OF
     PERIOD        $1,000 INVESTMENT  THE PERIOD
     ------        ----------------- -------------
            AVERAGE ANNUAL TOTAL RETURN                           
        (including maximum applicable sales charge)                   
<S>                  <C>               <C>
One year ended    
July 31, 1996...           0.68%         $1,006.80
Inception (March  
27, 1992) to      
July 31, 1996...  
Inception         
(October 21,      
1994) to July     
31, 1996........           4.59%         $1,083.00
              ANNUAL TOTAL RETURN                               
        (excluding maximum applicable sales charge)                   
Year ended July   
31, 1996........           4.88%         $1,048.80
Year ended July   
31, 1995........  
Year ended July   
31, 1994........  
Year ended July   
31, 1993........  
Inception (March  
27, 1992) to      
July 31, 1992...  
Inception         
(October 21,      
1994) to July     
31, 1995........           7.57%         $1,075.70
             AGGREGATE TOTAL RETURN                               
        (including maximum applicable sales charge)                    
Inception (March  
27, 1992) to      
July 31, 1996...  
Inception (Octo-  
ber 21, 1994) to  
July 31, 1996...           8.30%         $1,083.00
                           YIELD                    
30 days ended     
July 31, 1996...           4.41%
                   TAX-EQUIVALENT YIELD*                    
30 days ended     
July 31, 1996...           6.13%
</TABLE>    
- ----
          
* Based on a Federal income tax rate of 28%.     
 
                                       40
<PAGE>
 
  In order to reflect the reduced sales charges in the case of Class A or Class
D shares or the waiver of the CDSC in the case of Class B or Class C shares
applicable to certain investors, as described under "Purchase of Shares" and
"Redemption of Shares", respectively, the total return data quoted by the Fund
in advertisements directed to such investors may take into account the reduced,
and not the maximum, sales charge or may take into account the contingent
deferred sales charge and therefore may reflect greater total return since, due
to the reduced sales charges or the waiver of sales charges, a lower amount of
expenses is deducted.
 
                              GENERAL INFORMATION
 
DESCRIPTION OF SHARES
   
  The Declaration of Trust provides that the Trust shall be comprised of
separate Series each of which will consist of a separate portfolio which will
issue separate shares. The Trust is presently comprised of the Fund, Merrill
Lynch Arizona Municipal Bond Fund, Merrill Lynch Arkansas Municipal Bond Fund,
Merrill Lynch Colorado Municipal Bond Fund, Merrill Lynch Connecticut Municipal
Bond Fund, Merrill Lynch Florida Municipal Bond Fund, Merrill Lynch Maryland
Municipal Bond Fund, Merrill Lynch Massachusetts Municipal Bond Fund, Merrill
Lynch Michigan Municipal Bond Fund, Merrill Lynch New Jersey Municipal Bond
Fund, Merrill Lynch New Mexico Municipal Bond Fund, Merrill Lynch New York
Municipal Bond Fund, Merrill Lynch North Carolina Municipal Bond Fund, Merrill
Lynch Ohio Municipal Bond Fund, Merrill Lynch Oregon Municipal Bond Fund,
Merrill Lynch Pennsylvania Municipal Bond Fund and Merrill Lynch Texas
Municipal Bond Fund. The Trustees are authorized to create an unlimited number
of Series and, with respect to each Series, to issue an unlimited number of
full and fractional shares of beneficial interest, par value $.10 per share, of
different classes and to divide or combine the shares into a greater or lesser
number of shares without thereby changing the proportionate beneficial
interests in the Series. Shareholder approval is not necessary for the
authorization of additional Series or classes of a Series of the Trust. At the
date of this Statement of Additional Information, the shares of the Fund are
divided into Class A, Class B, Class C and Class D shares. Class A, Class B,
Class C and Class D shares represent interests in the same assets of the Fund
and are identical in all respects except that the Class B, Class C and Class D
shares bear certain expenses related to the account maintenance and/or
distribution of such shares and have exclusive voting rights with respect to
matters relating to such account maintenance and/or distribution expenditures.
The Board of Trustees may classify and reclassify the shares of any Series into
additional classes at a future date.     
 
  All shares of the Trust have equal voting rights, except that only shares of
the respective Series are entitled to vote on matters concerning only that
Series and, as noted above, Class B, Class C and Class D shares have exclusive
voting rights with respect to matters relating to the account maintenance
and/or distribution expenses being borne solely by such class. Each issued and
outstanding share is entitled to one vote and to participate equally in
dividends and distributions declared by the Fund and in the net assets of such
Series upon liquidation or dissolution remaining after satisfaction of
outstanding liabilities, except that, as noted above, expenses related to the
account maintenance and/or distribution of the Class B, Class C and Class D
shares are borne solely by such class. There normally will be no meetings of
shareholders for the purposes of electing Trustees unless and until such time
as less than a majority of the Trustees holding office have been elected by
shareholders, at which time the Trustees then in office will call a
shareholders' meeting for the election of Trustees. Shareholders may, in
accordance with the terms of the Declaration of Trust,
 
                                       41
<PAGE>
 
cause a meeting of shareholders to be held for the purpose of voting on the
removal of Trustees. Also, the Trust will be required to call a special meeting
of shareholders in accordance with the requirements of the 1940 Act to seek
approval of new management and advisory arrangements, of a material increase in
distribution fees or of a change in the fundamental policies, objectives or
restrictions of a Series.
 
  The obligations and liabilities of a particular Series are restricted to the
assets of that Series and do not extend to the assets of the Trust generally.
The shares of each Series, when issued, will be fully paid and nonassessable,
have no preference, preemptive, conversion, exchange or similar rights and are
freely transferable. Holders of shares of any Series are entitled to redeem
their shares as set forth elsewhere herein and in the Prospectus. Shares do not
have cumulative voting rights, and the holders of more than 50% of the shares
of the Trust voting for the election of Trustees can elect all of the Trustees
if they choose to do so and in such event the holders of the remaining shares
would not be able to elect any Trustees. No amendments may be made to the
Declaration of Trust without the affirmative vote of a majority of the
outstanding shares of the Trust.
   
  The Manager provided the initial capital for the Fund by purchasing 10,000
shares of the Fund for $100,000. Such shares were acquired for investment and
can only be disposed of by redemption. The organizational expenses of the Fund
were paid by the Fund and are being amortized over a period not exceeding five
years. The proceeds realized by the Manager upon the redemption of any of the
shares initially purchased by it will be reduced by the proportionate amount of
unamortized organizational expenses which the number of shares redeemed bears
to the number of shares initially purchased. Such organizational expenses
include certain of the initial organizational expenses of the Trust which have
been allocated to the Fund by the Trustees. If additional Series are added to
the Trust, the organizational expenses will be allocated among the Series in a
manner deemed equitable by the Trustees.     
 
                                       42
<PAGE>
 
COMPUTATION OF OFFERING PRICE PER SHARE
   
  An illustration of the computation of the initial offering price for Class
A, Class B, Class C and Class D shares of the Fund based on the value of the
Fund's net assets and number of shares outstanding on July 31, 1996, is
calculated as set forth below.     
       
<TABLE>   
<CAPTION>
                                      CLASS A     CLASS B    CLASS C   CLASS D
                                     ---------- ----------- ---------- --------
<S>                                  <C>        <C>         <C>        <C>
Net Assets.......................... $5,884,357 $48,696,225 $1,219,215 $683,550
                                     ========== =========== ========== ========
Number of Shares Outstanding........    572,608   4,738,076    118,616   66,462
                                     ========== =========== ========== ========
Net Asset Value Per Share (net
 assets divided by number of shares
 outstanding)....................... $    10.28 $     10.28 $    10.28 $  10.28
Sales Charge (for Class A and Class
 D shares: 4.00% of offering price
 (4.17% of net asset value per
 share))*...........................        .43          **         **      .43
                                     ---------- ----------- ---------- --------
Offering Price...................... $    10.71 $     10.28 $    10.28 $  10.71
                                     ========== =========== ========== ========
</TABLE>    
- --------
 * Rounded to the nearest one-hundredth percent; assumes maximum sales charge
   is applicable.
   
** Class B and Class C shares are not subject to an initial sales charge but
   may be subject to a CDSC on redemption. See "Purchase of Shares--Deferred
   Sales Charge Alternatives--Class B and Class C Shares" in the Prospectus
   and "Redemption of Shares--Deferred Sales Charges--Class B and Class C
   Shares" herein.     
 
INDEPENDENT AUDITORS
 
  Deloitte & Touche LLP, 117 Campus Drive, Princeton, New Jersey, 08540-6400,
has been selected as the independent auditors of the Fund. The independent
auditors are responsible for auditing the annual financial statements of the
Fund.
 
CUSTODIAN
 
  State Street Bank and Trust Company, P.O. Box 351, Boston, Massachusetts
02101, acts as the custodian of the Fund's assets. The custodian is
responsible for safeguarding and controlling the Fund's cash and securities,
handling the delivery of securities and collecting interest on the Fund's
investments.
 
TRANSFER AGENT
 
  Merrill Lynch Financial Data Services, Inc., 4800 Deer Lake Drive East,
Jacksonville, Florida 32246-6484, acts as the Trust's transfer agent. The
Transfer Agent is responsible for the issuance, transfer and redemption of
shares and the opening, maintenance and servicing of shareholder accounts. See
"Management of the Trust-Transfer Agency Services" in the Prospectus.
 
                                      43
<PAGE>
 
LEGAL COUNSEL
   
  Brown & Wood LLP, One World Trade Center, New York, New York 10048-0557, is
counsel for the Trust.     
 
REPORTS TO SHAREHOLDERS
 
  The fiscal year of the Fund ends on July 31 of each year. The Trust sends to
shareholders of the Fund at least semi-annually reports showing the Fund's
portfolio and other information. An annual report, containing financial
statements audited by independent auditors, is sent to shareholders each year.
After the end of each year, shareholders will receive Federal income tax
information regarding dividends and capital gains distributions.
 
ADDITIONAL INFORMATION
   
  The Prospectus and this Statement of Additional Information do not contain
all the information set forth in the Registration Statement and the exhibits
relating thereto, which the Trust has filed with the Commission, Washington,
D.C., under the Securities Act and the 1940 Act, to which reference is hereby
made.     
 
  The Declaration of Trust establishing the Trust dated August 2, 1985, a copy
of which, together with all amendments thereto (the "Declaration") is on file
in the office of the Secretary of the Commonwealth of Massachusetts, provides
that the name "Merrill Lynch Multi-State Municipal Series Trust" refers to the
Trustees under the Declaration collectively as Trustees, but not as individuals
or personally; and no Trustee, shareholder, officer, employee or agent of the
Trust shall be held to any personal liability; nor shall resort be had to any
such person's private property for the satisfaction of any obligation or claim
of the Trust but the "Trust Property" only shall be liable.
   
  To the knowledge of the Trust, no person or entity owned beneficially 5% or
more of the Fund's shares on October 1, 1996.     
 
                                       44
<PAGE>
 
                                   APPENDIX I
 
                        ECONOMIC CONDITIONS IN MINNESOTA
   
  The following information is a brief summary of factors affecting the economy
of the State and does not purport to be a complete description of such factors.
Other factors will affect issuers. The summary is based primarily upon one or
more publicly available offering statements relating to debt offerings of the
State of Minnesota and releases issued by the Minnesota Department of Finance;
however, the information has not been updated and it will not be updated during
the year. The Trust has not independently verified the information.     
   
  Diversity and a significant natural resource base are two important
characteristics of the Minnesota economy. Generally, the structure of the
State's economy parallels the structure of the United States economy as a
whole. There are, however, employment concentrations in durable goods and non-
durable goods manufacturing, particularly industrial machinery, instruments and
miscellaneous, food, paper and related industries, and printing and publishing.
During the period from 1980 to 1990, overall employment growth in Minnesota
lagged behind national employment growth, in large part due to declining
agricultural employment. The rate of non-farm employment growth in Minnesota
exceeded the rate of national growth, however, in the period of 1990 to 1995.
Since 1980, Minnesota per capita income generally has remained above the
national average. During the last three years, the State's monthly unemployment
rate has been less than the national unemployment rate.     
   
  The State relies heavily on a progressive individual income tax and a retail
sales tax for revenue, which results in a fiscal system that is sensitive to
economic conditions. Frequently in recent years, legislation has been required
to eliminate projected budget deficits by raising additional revenue, reducing
expenditures, including aids to political subdivisions and higher education,
reducing the State's budget reserve, imposing a sales tax on purchases by local
governmental units, and making other budgetary adjustments. The Minnesota
Department of Finance April 1996 Estimates project that, under current laws,
the State will complete its current biennium June 30, 1997 with a $1 million
surplus, plus a $350 million cash flow account balance, plus a $270 million
budget reserve. Total General Fund expenditures and transfers for the biennium
are projected to be $18.9 billion. Planning estimates (extrapolations) for the
biennium ending June 30, 1999 show a General Fund deficit of $71 million, after
funding a $350 million cash flow account plus a $270 million budget reserve, if
current law is not changed. Accordingly, there may be additional revenue
increases or spending cuts relative to current law. Furthermore, under current
law spending caps, State expenditures for education finance (K-12) and
corrections in the biennium ending June 30, 1999 are not anticipated to be
sufficient to maintain program levels of the previous biennium. The State is
party to a variety of civil actions that could adversely affect the State's
General Fund. In addition, substantial portions of State and local revenues are
derived from federal expenditures, and reductions in federal aid to the State
and its political subdivisions and other federal spending cuts may have
substantial adverse effects on the economic and fiscal condition of the State
and its local governmental units. The Department of Finance February 1996
Forecast states that possible federal spending cuts could reduce federal aid to
Minnesota's state and local governments by a total of $3.2 billion over seven
years. Risks are inherent in making revenue and expenditure forecasts. Economic
or fiscal conditions less favorable than those reflected in State budget
forecasts and planning estimates may create additional budgetary pressures.
    
                                       45
<PAGE>
 
  State grants and aids represent a large percentage of the total revenues of
cities, towns, counties and school districts in Minnesota, but generally the
State has no obligation to make payments on local obligations in the event of a
default. Even with respect to revenue obligations, no assurance can be given
that economic or other fiscal difficulties and the resultant impact on State
and local government finances will not adversely affect the ability of the
respective obligors to make timely payment of the principal and interest on
Minnesota Municipal Bonds that are held by the Fund or the value or
marketability of such obligations.
   
  Recent Minnesota tax legislation and possible future changes in federal and
State income tax laws, including rate reductions, could adversely affect the
value and marketability of Minnesota Municipal Bonds that are held by the Fund.
See "Distributions and Taxes".     
 
                                       46
<PAGE>
 
                                  APPENDIX II
 
                           RATINGS OF MUNICIPAL BONDS
 
DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S ("MOODY'S") MUNICIPAL BOND
RATINGS
 
Aaa  Bonds which are rated Aaa are judged to be of the best quality. They
     carry the smallest degree of investment risk and are generally
     referred to as "gilt edge". Interest payments are protected by a large
     or by an exceptionally stable margin and principal is secure. While
     the various protective elements are likely to change, such changes as
     can be visualized are most unlikely to impair the fundamentally strong
     position of such issues.
 
Aa   Bonds which are rated Aa are judged to be of high quality by all
     standards. Together with the Aaa group they comprise what are
     generally known as high grade bonds. They are rated lower than the
     best bonds because margins of protection may not be as large as in Aaa
     securities or fluctuation of protective elements may be of greater
     amplitude or there may be other elements present which make the long-
     term risks appear somewhat larger than in Aaa securities.
 
A    Bonds which are rated A possess many favorable investment attributes
     and are to be considered as upper medium grade obligations. Factors
     giving security to principal and interest are considered adequate, but
     elements may be present which suggest a susceptibility to impairment
     sometime in the future.
 
Baa  Bonds which are rated Baa are considered as medium grade obligations,
     i.e., they are neither highly protected nor poorly secured. Interest
     payment and principal security appear adequate for the present but
     certain protective elements may be lacking or may be
     characteristically unreliable over any great length of time. Such
     bonds lack outstanding investment characteristics and in fact have
     speculative characteristics as well.
 
Ba   Bonds which are rated Ba are judged to have speculative elements;
     their future cannot be considered as well assured. Often the
     protection of interest and principal payments may be very moderate and
     thereby not well safeguarded during both good and bad times over the
     future. Uncertainty of position characterizes bonds in this class.
 
B    Bonds which are rated B generally lack characteristics of the
     desirable investment. Assurance of interest and principal payments or
     of maintenance of other terms of the contract over any long period of
     time may be small.
 
Caa  Bonds which are rated Caa are of poor standing. Such issues may be in
     default or there may be present elements of danger with respect to
     principal or interest.
 
Ca   Bonds which are rated Ca represent obligations which are speculative
     in a high degree. Such issues are often in default or have other
     marked shortcomings.
 
C    Bonds which are rated C are the lowest rated class of bonds, and
     issues so rated can be regarded as having extremely poor prospects of
     ever attaining any real investment standing.
 
Note: Those bonds in the Aa, A, Baa, Ba and B groups which Moody's believes
possess the strongest investment attributes are designated by the symbols Aa1,
A1, Baa1, Ba1 and B1.
 
                                       47
<PAGE>
 
  Short-term Notes: The four ratings of Moody's for short-term notes are MIG
1/VMIG1, MIG 2/VMIG2, MIG 3/VMIG3 and MIG 4/VMIG4; MIG 1/VMIG1 denotes "best
quality . . . strong protection by established cash flows"; MIG 2/VMIG2 denotes
"high quality" with ample margins of protection; MIG 3/VMIG3 notes are of
"favorable quality . . . but . . . lacking the undeniable strength of the
preceding grades"; MIG 4/VMIG4 notes are of "adequate quality . . .
[p]rotection commonly regarded as required of an investment security is present
 . . . there is specific risk".
 
DESCRIPTION OF MOODY'S CORPORATE BOND RATINGS
 
  Excerpts from Moody's description of its corporate bond ratings: Aaa--judged
to be the best quality, carry the smallest degree of investment risk; Aa--
judged to be of high quality by all standards; A--possess many favorable
investment attributes and are to be considered as upper medium grade
obligations; Baa--considered as medium grade obligations, i.e., they are
neither highly protected nor poorly secured.
 
DESCRIPTION OF MOODY'S COMMERCIAL PAPER RATINGS
 
  Moody's Commercial Paper ratings are opinions of the ability of issuers to
repay punctually promissory obligations not having an original maturity in
excess of nine months. Moody's employs the following three designations, all
judged to be investment grade, to indicate the relative repayment capacity of
rated issuers:
 
  Issuers rated Prime-1 (or related supporting institutions) have a superior
capacity for repayment of short-term promissory obligations. Prime-1 repayment
capacity will normally be evidenced by the following characteristics: leading
market positions in well established industries; high rates of return on funds
employed; conservative capitalization structures with moderate reliance on debt
and ample asset protection; broad margins in earning coverage of fixed
financial charges and high internal cash generation; and well established
access to a range of financial markets and assured sources of alternate
liquidity.
 
  Issuers rated Prime-2 (or related supporting institutions) have a strong
capacity for repayment of short-term promissory obligations. This will normally
be evidenced by many of the characteristics cited above but to a lesser degree.
Earnings trends and coverage ratios, while sound, will be more subject to
variation. Capitalization characteristics, while still appropriate, may be more
affected by external conditions. Ample alternate liquidity is maintained.
 
  Issuers rated Prime-3 (or related supporting institutions) have an acceptable
capacity for repayment of short-term promissory obligations. The effects of
industry characteristics and market composition may be more pronounced.
Variability in earnings and profitability may result in changes in the level of
debt protection measurements and the requirement for relatively high financial
leverage. Adequate alternate liquidity is maintained.
 
  Issuers rated Not Prime do not fall within any of the Prime rating
categories.
 
DESCRIPTION OF STANDARD & POOR'S RATINGS GROUP ("STANDARD & POOR'S") MUNICIPAL
DEBT RATINGS
 
  A Standard & Poor's municipal debt rating is a current assessment of the
creditworthiness of an obligor with respect to a specific obligation. This
assessment may take into consideration obligors such as guarantors, insurers,
or lessees.
 
                                       48
<PAGE>
 
  The debt rating is not a recommendation to purchase, sell or hold a security,
inasmuch as it does not comment as to market price or suitability for a
particular investor.
 
  The ratings are based on current information furnished by the issuer or
obtained by Standard & Poor's from other sources Standard & Poor's considers
reliable. Standard & Poor's does not perform an audit in connection with any
rating and may, on occasion, rely on unaudited financial information. The
ratings may be changed, suspended or withdrawn as a result of changes in, or
unavailability of, such information, or for other reasons.
 
  The ratings are based, in varying degrees, on the following considerations:
 
I.          Likelihood of default--capacity and willingness of the obligor as
            to the timely payment of interest and repayment of principal in
            accordance with the terms of the obligation;
 
II.         Nature of and provisions of the obligation;
 
III.        Protection afforded by, and relative position of, the obligation
            in the event of bankruptcy, reorganization or other arrangement
            under the laws of bankruptcy and other laws affecting creditors'
            rights.
           AAA  Debt rated "AAA" has the highest rating assigned by Standard &
                Poor's. Capacity to pay interest and repay principal is
                extremely strong.
            AA  Debt rated "AA" has a very strong capacity to pay interest and
                repay principal and differs from the highest rated issues only
                in small degree.
             A  Debt rated "A" has a strong capacity to pay interest and repay
                principal although they are somewhat more susceptible to the
                adverse effects of changes in circumstances and economic
                conditions than debt in higher-rated categories.
           BBB  Debt rated "BBB" is regarded as having an adequate capacity to
                pay interest and repay principal. Whereas it normally exhibits
                adequate protection parameters, adverse economic conditions or
                changing circumstances are more likely to lead to a weakened
                capacity to pay interest and repay principal for debt in this
                category than for debt in higher rated categories.
            BB  Debt rated "BB", "B", "CCC", "CC" and "C" are regarded, on
             B  balance, as predominately speculative with respect to capacity 
           CCC  to pay interest and repay principal in accordance with the terms
            CC  of the obligations. "BB" indicates the lowest degree of 
             C  speculation and "C" the highest degree of speculation. While
                such bonds will likely have some quality and protective 
                characteristics, these are outweighed by large uncertainties 
                or major risk exposures to adverse conditions.
            CI  The rating "CI" is reserved for income bonds on which no
                interest is being paid.
             D  Debt rated "D" is in payment default. The "D" rating category
                is used when interest payments of principal payments are not
                made on the date due even if the applicable grace period has
                not expired, unless Standard & Poor's believes that such
                payments will be made during such grace period. The "D" rating
                also will be used upon the filing of a bankruptcy petition if
                debt service payments are jeopardized.
 
  Plus (+) or Minus (-): The ratings from "AA" to "CCC" may be modified by the
addition of a plus or minus sign to show relative standing within the major
rating categories.
 
                                       49
<PAGE>
 
DESCRIPTION OF STANDARD & POOR'S CORPORATE BOND RATINGS
 
  A Standard & Poor's corporate debt rating is a current assessment of the
creditworthiness of an obligor with respect to a specific obligation. Debt
rated "AAA" has the highest rating assigned by Standard & Poor's. Capacity to
pay interest and repay principal is extremely strong. Debt rated "AA" has a
very strong capacity to pay interest and to repay principal and differs from
the highest rated issues only in small degree. Debt rated "A" has a strong
capacity to pay interest and repay principal although it is somewhat more
susceptible to the adverse effects of changes in circumstances and economic
conditions than debt of a higher rated category. Debt rated "BBB" is regarded
as having an adequate capacity to pay interest and repay principal. Whereas it
normally exhibits adequate protection parameters, adverse economic conditions
or changing circumstances are more likely to lead to a weakened capacity to pay
interest and repay principal for debt in this category than in higher rated
categories.
 
  The ratings from "AA" to "BBB" may be modified by the addition of a plus or
minus sign to show relative standing within the major rating categories.
 
DESCRIPTION OF STANDARD & POOR'S COMMERCIAL PAPER RATINGS
 
  A Standard & Poor's Commercial Paper Rating is a current assessment of the
likelihood of timely payment of debt having an original maturity of no more
than 365 days. Ratings are graded into four categories, ranging from "A" for
the highest quality obligations to "D" for the lowest. Ratings are applicable
to both taxable and tax-exempt commercial paper. Issues assigned the highest
rating are regarded as having the greatest capacity for timely payment. Issues
in this category are further refined with the designation 1, 2 and 3 to
indicate the relative degree of safety. These categories are as follows:
 
   A-1  This highest category indicates that the degree of safety regarding
        timely payment is strong. Those issues determined to possess extremely
        strong safety characteristics are denoted with a plus sign (+)
        designation.
 
   A-2  Capacity for timely payment on issues with this designation is
        satisfactory. However, the relative degree of safety is not as high as
        for issues designated "A-1".
 
   A-3  Issues carrying this designation have adequate capacity for timely
        payment. They are, however, somewhat more vulnerable to the adverse
        effects of changes in circumstances than obligations carrying the
        higher designations.
 
     B  Issues rated "B" are regarded as having only speculative capacity for
        timely payment.
 
     C  This rating is assigned to short-term debt obligations with a doubtful
        capacity for payment.
 
     D  Debt rated "D" is in payment default. The "D" rating category is used
        when interest payments or principal payments are not made on the date
        due, even if the applicable grace period has not expired, unless
        Standard & Poor's believes that such payments will be made during such
        grace period.
 
  A Commercial Paper Rating is not a recommendation to purchase or sell a
security. The ratings are based on current information furnished to Standard &
Poor's by the issuer or obtained by Standard & Poor's from other sources it
considers reliable. The ratings may be changed, suspended, or withdrawn as a
result of changes in, or unavailability of, such information.
 
                                       50
<PAGE>
 
  A Standard & Poor's note rating reflects the liquidity concerns and market
access risks unique to such notes. Notes due in three years or less will likely
receive a note rating. Notes maturing beyond three years will most likely
receive a long-term debt rating. The following criteria will be used in making
that assessment.
 
  --Amortization schedule (the larger the final maturity relative to other
    maturities, the more likely it will be treated as a note).
 
  --Source of payment (the more dependent the issue is on the market for its
    refinancing, the more likely it will be treated as a note).
 
Note rating symbols are as follows:
 
  SP-1  A very strong, or strong, capacity to pay principal and interest.
        Issues that possess overwhelming safety characteristics will be given
        a "+" designation.
 
  SP-2  A satisfactory capacity to pay principal and interest.
 
  SP-3  A speculative capacity to pay principal and interest.
 
  Standard & Poor's may continue to rate note issues with a maturity greater
than three years in accordance with the same rating scale currently employed
for municipal bond ratings.
 
  Unrated: Where no rating has been assigned or where a rating has been
suspended or withdrawn, it may be for reasons unrelated to the quality of the
issue.
 
  Should no rating be assigned, the reason may be one of the following:
 
    1. An application for rating was not received or accepted.
 
    2. The issue or issuer belongs to a group of securities that are not
  rated as a matter of policy.
 
    3. There is a lack of essential data pertaining to the issue or issuer.
 
    4. The issue was privately placed, in which case the rating is not
  published in Standard & Poor's publications.
 
  Suspension or withdrawal may occur if new and material circumstances arise,
the effects of which preclude satisfactory analysis; if there is no longer
available reasonable up-to-date information to permit a judgment to be formed;
if a bond is called for redemption; or for other reasons.
 
DESCRIPTION OF FITCH INVESTORS SERVICE, INC.'S ("FITCH") INVESTMENT GRADE BOND
RATINGS
 
  Fitch investment grade bond ratings provide a guide to investors in
determining the credit risk associated with a particular security. The ratings
represent Fitch's assessment of the issuer's ability to meet the obligations of
a specific debt issue or class of debt in a timely manner.
 
  The rating takes into consideration special features of the issue, its
relationship to other obligations of the issuer, the current and prospective
financial condition and operating performance of the issuer and of any
guarantor, as well as the economic and political environment that might affect
the issuer's future financial strength and credit quality.
 
                                       51
<PAGE>
 
  Fitch ratings do not reflect any credit enhancement that may be provided by
insurance policies or financial guaranties unless otherwise indicated.
 
  Bonds that have the same rating are of similar but not necessarily identical
credit quality since the rating categories do not fully reflect small
differences in the degrees of credit risk.
 
  Fitch ratings are not recommendations to buy, sell, or hold any security.
Ratings do not comment on the adequacy of market price, the suitability of any
security for a particular investor, or the tax-exempt nature or taxability of
payments made in respect of any security.
 
  Fitch ratings are based on information obtained from issuers, other obligors,
underwriters, their experts, and other sources Fitch believes to be reliable.
Fitch does not audit or verify the truth or accuracy of such information.
Ratings may be changed, suspended, or withdrawn as a result of changes in, or
the unavailability of, information or for other reasons.
 
AAA  Bonds considered to be investment grade and of the highest credit
     quality. The obligor has an exceptionally strong ability to pay
     interest and repay principal, which is unlikely to be affected by
     reasonably foreseeable events.
 
AA   Bonds considered to be investment grade and of very high credit
     quality. The obligor's ability to pay interest and repay principal is
     very strong, although not quite as strong as bonds rated "AAA".
     Because bonds rated in the "AAA" and "AA" categories are not
     significantly vulnerable to foreseeable future developments, short-
     term debt of these issuers is generally rated "F-1+".
 
A    Bonds considered to be investment grade and of high credit quality.
     The obligor's ability to pay interest and repay principal is
     considered to be strong, but may be more vulnerable to adverse changes
     in economic conditions and circumstances than bonds with higher
     ratings.
 
BBB  Bonds considered to be investment grade and of satisfactory credit
     quality. The obligor's ability to pay interest and repay principal is
     considered to be adequate. Adverse changes in economic conditions and
     circumstances, however, are more likely to have adverse impact on
     these bonds, and therefore, impair timely payment. The likelihood that
     the ratings of these bonds will fall below investment grade is higher
     than for bonds with higher ratings.
 
  Plus (+) or Minus (-): Plus and minus signs are used with a rating symbol to
indicate the relative position of a credit within the rating category. Plus and
minus signs, however, are not used in the "AAA" category.
 
  Credit Trend Indicator: Credit trend indicators show whether credit
fundamentals are improving, stable, declining, or uncertain, as follows:
 
  Improving     UP ARROW
 
  Stable        LEFT ARROW/RIGHT ARROW
 
  Declining     DOWN ARROW
 
  Uncertain     UP ARROW/DOWN ARROW
 
                                       52
<PAGE>
 
  Credit trend indicators are not predictions that any rating change will
occur, and have a longer-term time frame than issues placed on FitchAlert.
 
NR          indicates that Fitch does not rate the specific issue.
 
Conditional A conditional rating is premised on the successful completion of a
            project or the occurrence of a specific event.
 
Suspended   A rating is suspended when Fitch deems the amount of information
            available from the issuer to be inadequate for rating purposes.
 
Withdrawn   A rating will be withdrawn when an issue matures or is called or
            refinanced and, at Fitch's discretion, when an issuer fails to
            furnish proper and timely information.
 
FitchAlert  Ratings are placed on FitchAlert to notify investors of an
            occurrence that is likely to result in a rating change and the
            likely direction of such change. These are designated as
            "Positive", indicating a potential upgrade, "Negative", for
            potential downgrade, or "Evolving", where ratings may be raised or
            lowered. FitchAlert is relatively short-term, and should be
            resolved within 12 months.
 
DESCRIPTION OF FITCH SPECULATIVE GRADE BOND RATINGS
 
  Fitch speculative grade bond ratings provide a guide to investors in
determining the credit risk associated with a security. The ratings ("BB" to
"C") represent Fitch's assessment of the likelihood of timely payment of
principal and interest in accordance with the terms of obligation for bond
issues not in default. For defaulted bonds, the rating ("DDD" to "D") is an
assessment of the ultimate recovery value through reorganization or
liquidation.
 
  The rating takes into consideration special features of the issue, its
relationship to other obligations of the issuer, the current and prospective
financial condition and operating performance of the issuer and any guarantor,
as well as the economic and political environment that might affect the
issuer's future financial strength.
 
  Bonds that have the same rating are of similar but not necessarily identical
credit quality since rating categories cannot fully reflect the differences in
degrees of credit risk.
 
BB              Bonds are considered speculative. The obligor's ability to pay
                interest and repay principal may be affected over time by
                adverse economic changes. However, business and financial
                alternatives can be identified which could assist the obligor
                in satisfying its debt service requirements.
 
B               Bonds are considered highly speculative. While bonds in this
                class are currently meeting debt service requirements, the
                probability of continued timely payment of principal and
                interest reflects the obligor's limited margin of safety and
                the need for reasonable business and economic activity
                throughout the life of the issue.
 
                                       53
<PAGE>
 
CCC             Bonds have certain identifiable characteristics which, if not
                remedied, may lead to default. The ability to meet obligations
                requires an advantageous business and economic environment.
 
CC              Bonds are minimally protected. Default in payment of interest
                and/or principal seems probable over time.
 
C               Bonds are in imminent default in payment of interest or
                principal.
 
DDD, DD and D   Bonds are in default on interest and/or principal payments.
                Such bonds are extremely speculative and should be valued on
                the basis of their ultimate recovery value in liquidation or
                reorganization of the obligor. "DDD" represents the highest
                potential for recovery on these bonds, and "D" represents the
                lowest potential for recovery.
 
  Plus (+) or Minus (-): Plus and minus signs are used with a rating symbol to
indicate the relative position of a credit within the rating category. Plus and
minus signs, however, are not used in the "DDD", "DD", or "D" categories.
 
DESCRIPTION OF FITCH INVESTMENT GRADE SHORT-TERM RATINGS
 
  Fitch's short-term ratings apply to debt obligations that are payable on
demand or have original maturities of generally up to three years, including
commercial paper, certificates of deposit, medium-term notes, and municipal and
investment notes.
 
  The short-term rating places greater emphasis than a long-term rating on the
existence of liquidity necessary to meet the issuer's obligations in a timely
manner.
 
  Fitch short-term ratings are as follows:
 
F-1+Exceptionally Strong Credit Quality. Issues assigned this rating are
    regarded as having the strongest degree of assurance for timely
    payment.
 
F-1 Very Strong Credit Quality. Issues assigned this rating reflect an
    assurance of timely payment only slightly less in degree than issues
    rated "F-1+".
 
F-2 Good Credit Quality. Issues assigned this rating have a satisfactory
    degree of assurance for timely payment, but the margin of safety is not
    as great as for issues assigned "F-1+" and "F-1" ratings.
 
F-3 Fair Credit Quality. Issues assigned this rating have characteristics
    suggesting that the degree of assurance for timely payment is adequate,
    however, near-term adverse changes could cause these securities to be
    rated below investment grade.
 
                                       54
<PAGE>
 
F-S Weak Credit Quality. Issues assigned this rating have characteristics
    suggesting a minimal degree of assurance for timely payment and are
    vulnerable to near-term adverse changes in financial and economic
    conditions.
 
D   Default. Issues assigned this rating are in actual or imminent payment
    default.
 
LOC The symbol "LOC" indicates that the rating is based on a letter of
    credit issued by a commercial bank.
   
INS     
       
    The symbol "INS" indicates that the rating is based on an insurance
    policy or financial guaranty issued by an insurance company.     
 
                                       55
<PAGE>
 
INDEPENDENT AUDITORS' REPORT
 
The Board of Trustees and Shareholders,
Merrill Lynch Minnesota Municipal Bond Fund
of Merrill Lynch Multi-State Municipal Series Trust:
   
We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch Minnesota Municipal Bond Fund of
Merrill Lynch Multi-State Municipal Series Trust as of July 31, 1996, the
related statements of operations for the year then ended and changes in net
assets for each of the years in the two-year period then ended, and the
financial highlights for each of the years in the four-year period then ended
and for the period March 27, 1992 (commencement of operations) to July 31,
1992. These financial statements and the financial highlights are the
responsibility of the Fund's management. Our responsibility is to express an
opinion on these financial statements and the financial highlights based on our
audits.     
   
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and the financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned at July
31, 1996 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.     
   
In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Merrill Lynch
Minnesota Municipal Bond Fund of Merrill Lynch Multi-State Municipal Series
Trust as of July 31, 1996, the results of its operations, the changes in its
net assets, and the financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.     
 
Deloitte & Touche LLP
Princeton, New Jersey
   
September 6, 1996     
 
                                       56
<PAGE>
 
PORTFOLIO ABBREVIATIONS

To simplify the listings of Merrill Lynch Minnesota Municipal Bond
Fund's portfolio holdings in the Schedule of Investments, we have
abbreviated the names of many of the securities according to the
list below and at right.


AMT    Alternative Minimum Tax (subject to)
EDA    Economic Development Authority
GO     Government Obligation Bonds
HFA    Housing Finance Agency
IDR    Industrial Development Revenue Bonds
IRS    Inverse Rate Securities
M/F    Multi-Family
PCR    Pollution Control Revenue Bonds
S/F    Single-Family
UT     Unlimited Tax
VRDN   Variable Rate Demand Notes

<TABLE>
<CAPTION>


SCHEDULE OF INVESTMENTS                                                                                   (in Thousands)

S&P     Moody's       Face                                                                                       Value
Ratings Ratings      Amount                                          Issue                                     (Note 1a)

Minnesota--100.7%
<S>      <S>         <C>      <S>                                                                                <C>
NR*      A           $1,475   Alexandria, Minnesota, Independent School District No. 206, UT, Series A,
                              6.30% due 2/01/2010                                                                $ 1,546

A1+      Aa3          2,225   Anoka County, Minnesota, Solid Waste Disposal Revenue Bonds (National
                              Rural Utilities), AMT, Series A, 6.95% due 12/01/2008                                2,364

A1+      NR*          1,100   Beltrami County, Minnesota, Environmental Control Revenue Bonds (Northwood
                              Panelboard Co. Project), VRDN, AMT, 3.65% due 7/01/2025 (a)                          1,100

NR*      Baa1         1,000   Clay County, Minnesota, Housing and Redevelopment Authority, Lease Revenue
                              Bonds, 6.50% due 2/01/2014 (i)                                                       1,016

AAA      NR*          3,530   Coon Rapids, Minnesota, M/F Housing Revenue Refunding Bonds (Browns Meadow),
                              AMT, 6.85% due 8/01/2033 (h)                                                         3,624

AAA      NR*          1,000   Duluth, Minnesota, EDA, Hospital Facilities Revenue Refunding Bonds (Saint
                              Luke's Hospital of Duluth), Series B, 6.40% due 5/01/2018 (c)                        1,043

A1+      NR*          1,600   Hubbard County, Minnesota, Solid Waste Disposal Revenue Bonds (Potlatch
                              Corporation Project), VRDN, AMT, 3.65% due 8/01/2014 (a)                             1,600

A-       A            2,000   Minneapolis and Saint Paul, Minnesota, Housing and Redevelopment Authority,
                              Health Care System Revenue Bonds (Group Health Plan Incorporated Project),
                              6.90% due 10/15/2022                                                                 2,160

AA-      A1           1,600   Minneapolis, Minnesota, Community Development Agency, PCR (Northern System
                              Power Co. Project), VRDN, 3.70% due 3/01/2011 (a)                                    1,600

AAA      Aaa          1,500   Minneapolis, Minnesota, Sales Tax Refunding Bonds, GO, UT, 6.25%
                              due 4/01/2012                                                                        1,575

AAA      Aa1          1,300   Minnesota Public Facilities Authority, Water, PCR, Series A, 6.50%
                              due 3/01/2014                                                                        1,390

                              Minnesota State, GO, UT:
AAA      NR*          1,000     6.50% due 8/01/2001 (g)                                                            1,085
AAA      NR*          1,000     6.625% due 8/01/2001 (g)                                                           1,088
AA+      Aaa          1,500     6% due 10/01/2014                                                                  1,542

                              Minnesota State HFA, S/F Mortgage:
AA+      Aa           1,750     AMT, Series E, 6.85% due 1/01/2024                                                 1,805
AA+      Aa           1,480     AMT, Series L, 6.70% due 7/01/2020                                                 1,519
AA+      Aa             860     Series A, 6.95% due 7/01/2016                                                        902
AA+      Aa           1,635     Series D-1, 6.50% due 1/01/2017                                                    1,681

AAA      NR*          1,000   Minnesota State Higher Educational Facilities Authority, Mortgage Revenue
                              Bonds (Augsburg College), Series 3-G, 6.50% due 1/01/2011 (c)                        1,041
</TABLE>

                                      57
<PAGE>
 
<TABLE>
<CAPTION>

SCHEDULE OF INVESTMENTS (concluded)                                                                       (in Thousands)

S&P     Moody's       Face                                                                                       Value
Ratings Ratings      Amount                                          Issue                                     (Note 1a)

Minnesota (concluded)
<S>      <S>         <C>      <S>                                                                                <C>
                              Minnesota State Higher Educational Facilities Authority, Revenue
                              Refunding Bonds (Macalester College), Series 3-J:
AA-      Aa          $  550     6.30% due 3/01/2014                                                              $   574
AA-      Aa           2,250     6.40% due 3/01/2022                                                                2,357

AA       Aa1          2,000   North Saint Paul, Minnesota, Maplewood Independent School District No.
                              622, UT, 5.125% due 2/01/2020                                                        1,835

A        A              890   Northern Minnesota Municipal Power Agency, Electric System Revenue
                              Refunding Bonds, Series A, 7.25% due 1/01/2016                                         949

NR*      A              500   Northfield, Minnesota, College Facilities Revenue Refunding Bonds (Saint
                              Olaf College Project), 6.40% due 10/01/2021                                            521

AAA      Aaa          1,000   Prior Lake, Minnesota, Independent School District No. 719, UT, Series A,
                              5.25% due 2/01/2016 (f)                                                                947

AA-      A1           1,300   Red Wing, Minnesota, PCR (Northern States Power Company Project), VRDN,
                              3.70% due 3/01/2011 (a)                                                              1,300

AA+      NR*          3,450   Rochester, Minnesota, Health Care Facilities Revenue Bonds (Mayo Foundation),
                              IRS, Series H, 8.067% due 11/15/2015 (j)                                             3,411

AAA      Aaa          1,825   Saint Cloud, Minnesota, Hospital Facilities Revenue Refunding Bonds
                              (Saint Cloud Hospital), Series B, 5% due 7/01/2020 (b)                               1,622

AAA      Aaa          1,000   Saint Francis, Minnesota, Independent School District No. 015, UT, Series A,
                              6.35% due 2/01/2013 (k)                                                              1,059

                              Saint Paul, Minnesota, Housing and Redevelopment Authority Revenue Bonds:
A-       NR*          1,750     Parking, Series A, 6.55% due 8/01/2000 (g)                                         1,902
A        A            3,175     Sales Tax (Civic Center Project), 5.55% due 11/01/2023 (d)                         3,027
AAA      NR*            910     S/F Mortgage, Refunding, Series C, 6.95% due 12/01/2031 (e)                          941

                              Saint Paul, Minnesota, Independent School District No. 625, UT:
AA       Aa           2,225     5.25% due 2/01/2014                                                                2,134
AA       Aa           1,125     Series B, 6.25% due 2/01/2001 (g)                                                  1,199

                              Sartell, Minnesota, Refunding (Champion International):
BBB      Baa1           990     IDR, 6.95% due 7/01/2012                                                           1,042
BBB      Baa1           665     PCR, 6.95% due 10/01/2012                                                            700

AAA      Aaa          4,000   Southern Minnesota Municipal Power Agency, Power Supply Systems, Revenue
                              Refunding Bonds, Series A, 6.085%** due 1/01/2024 (l)                                  781

AAA      Aaa            820   Western Minnesota Municipal Power Agency, Power Supply Revenue Bonds,
                              Series A, 6.375% due 1/01/2016 (d)                                                     874


Total Investments (Cost--$54,702)--100.7%                                                                         56,856

Liabilities in Excess of Other Assets--(0.7%)                                                                       (373)
                                                                                                                 -------
Net Assets--100.0%                                                                                               $56,483
                                                                                                                 =======
</TABLE>

[FN]
(a)The interest rate is subject to change periodically based upon
   prevailing market rates. The interest rate shown is the rate in
   effect at July 31, 1996.
(b)AMBAC Insured.
(c)Insured by Connie Lee.
(d)Escrowed to Maturity.
(e)FNMA Collateralized.
(f)FGIC Insured.
(g)Prerefunded.
(h)FHA Insured.
(i)Bank Qualified.
(j)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 July 31, 1996.
(k)FSA Insured.
(l)MBIA Insured.
  *Not Rated.
 **Represents a zero coupon bond; the interest rate shown is the
   effective yield at the time of purchase by the Fund.
Ratings of issues shown have not been audited by Deloitte & Touche LLP.

See Notes to Financial Statements.

                                      58
<PAGE>
 
FINANCIAL INFORMATION

<TABLE>
<CAPTION> 

Statement of Assets and Liabilities as of July 31, 1996

<S>                 <S>                                                                    <C>              <C>
Assets:             Investments, at value (identified cost--$54,701,947) (Note 1a)                          $ 56,855,714
                    Cash                                                                                          47,870
                    Receivables:
                      Interest                                                             $    906,487
                      Securities sold                                                            80,448
                      Beneficial interest sold                                                    9,989          996,924
                                                                                           ------------

                    Deferred organization expenses (Note 1e)                                                       5,221
                    Prepaid registration fees and other assets (Note 1e)                                          20,046
                                                                                                            ------------
                    Total assets                                                                              57,925,775
                                                                                                            ------------

Liabilities:        Payables:
                      Securities purchased                                                    1,061,128
                      Beneficial interest redeemed                                              168,872
                      Dividends to shareholders (Note 1f)                                        62,507
                      Investment adviser (Note 2)                                                26,486
                      Distributor (Note 2)                                                       21,447        1,340,440
                                                                                           ------------
                    Accrued expenses and other liabilities                                                       101,988
                                                                                                            ------------
                    Total liabilities                                                                          1,442,428
                                                                                                            ------------

Net Assets:         Net assets                                                                              $ 56,483,347
                                                                                                            ============

Net Assets          Class A Shares of beneficial interest, $.10 par value,
Consist of:         unlimited number of shares authorized                                                   $     57,261
                    Class B Shares of beneficial interest, $.10 par value,
                    unlimited number of shares authorized                                                        473,808
                    Class C Shares of beneficial interest, $.10 par value,
                    unlimited number of shares authorized                                                         11,862
                    Class D Shares of beneficial interest, $.10 par value,
                    unlimited number of shares authorized                                                          6,646
                    Paid-in capital in excess of par                                                          55,819,752
                    Accumulated realized capital losses on investments
                    --net (Note 5)                                                                            (1,229,809)
                    Accumulated distributions in excess of realized capital
                    gains--net (Note 1f)                                                                        (809,940)
                    Unrealized appreciation on investments--net                                                2,153,767
                                                                                                            ------------
                    Net assets                                                                              $ 56,483,347
                                                                                                            ============

Net Asset Value:    Class A--Based on net assets of $5,884,357 and 572,608
                    shares of beneficial interest outstanding                                               $     10.28
                                                                                                            ============
                    Class B--Based on net assets of $48,696,225 and 4,738,076
                    shares of beneficial interest outstanding                                               $     10.28
                                                                                                            ============
                    Class C--Based on net assets of $1,219,215 and 118,616
                    shares of beneficial interest outstanding                                               $     10.28
                                                                                                            ============
                    Class D--Based on net assets of $683,550 and 66,462
                    Shares of beneficial interest outstanding                                               $     10.28
                                                                                                            ============

                    See Notes to Financial Statements.
</TABLE>

                                      59
<PAGE>
 
FINANCIAL INFORMATION (continued)

<TABLE>
<CAPTION>

Statement of Operations

                                                                                                      For the Year Ended
                                                                                                           July 31, 1996
<S>                 <S>                                                                    <C>              <C>
Investment Income   Interest and amortization of premium and discount earned                                $  3,589,994
(Note 1d):

Expenses:           Investment advisory fees (Note 2)                                      $    328,665
                    Account maintenance and distribution fees--Class B (Note 2)                 258,745
                    Professional fees                                                            60,273
                    Printing and shareholder reports                                             56,419
                    Accounting services (Note 2)                                                 52,951
                    Transfer agent fees--Class B (Note 2)                                        35,169
                    Registration fees (Note 1e)                                                  13,982
                    Amortization of organization expenses (Note 1e)                               8,097
                    Pricing fees                                                                  5,937
                    Account maintenance and distribution fees--Class C (Note 2)                   5,345
                    Custodian fees                                                                4,397
                    Transfer agent fees--Class A (Note 2)                                         3,618
                    Trustees' fees and expenses                                                   2,852
                    Account maintenance fees--Class D (Note 2)                                      713
                    Transfer agent fees--Class C (Note 2)                                           642
                    Transfer agent fees--Class D (Note 2)                                           406
                    Other                                                                         1,051
                                                                                           ------------
                    Total expenses before reimbursement                                         839,262
                    Reimbursement of expenses (Note 2)                                          (65,688)
                                                                                           ------------
                    Total expenses after reimbursement                                                           773,574
                                                                                                            ------------
                    Investment income--net                                                                     2,816,420
                                                                                                            ------------

Realized &          Realized loss on investments--net                                                           (284,411)
Unrealized          Change in unrealized appreciation on investments--net                                         93,704
Gain (Loss) on                                                                                              ------------
Investments--Net    Net Increase in Net Assets Resulting from Operations                                    $  2,625,713
(Notes 1b, 1d & 3):                                                                                         ============


                    See Notes to Financial Statements.
</TABLE>

                                      60
<PAGE>
 
FINANCIAL INFORMATION (continued)

<TABLE>
<CAPTION>

Statements of Changes in Net Assets

                                                                                            For the Year Ended July 31,
Increase (Decrease) in Net Assets:                                                             1996             1995
<S>                 <S>                                                                    <C>              <C>
Operations:         Investment income--net                                                 $  2,816,420     $  3,075,897
                    Realized loss on investments--net                                          (284,411)        (945,500)
                    Change in unrealized appreciation on investments--net                        93,704          506,946
                                                                                           ------------     ------------
                    Net increase in net assets resulting from operations                      2,625,713        2,637,343
                                                                                           ------------     ------------

Dividends to        Investment income--net:
Shareholders          Class A                                                                  (331,165)        (407,132)
(Note 1f):            Class B                                                                (2,408,920)      (2,647,786)
                      Class C                                                                   (40,224)          (6,180)
                      Class D                                                                   (36,111)         (14,799)
                                                                                           ------------     ------------
                    Net decrease in net assets resulting from dividends
                    to shareholders                                                          (2,816,420)      (3,075,897)
                                                                                           ------------     ------------

Beneficial Interest Net decrease in net assets derived from beneficial interest
Transactions        transactions                                                             (3,455,361)      (5,201,307)
(Note 4):                                                                                  ------------     ------------


Net Assets:         Total decrease in net assets                                             (3,646,068)      (5,639,861)
                    Beginning of year                                                        60,129,415       65,769,276
                                                                                           ------------     ------------
                    End of year                                                            $ 56,483,347     $ 60,129,415
                                                                                           ============     ============

                    See Notes to Financial Statements.
</TABLE>

                                      61
<PAGE>
 
FINANCIAL INFORMATION (continued)

Financial Highlights

<TABLE>
<CAPTION>
                                                                                             Class A
                                                                                                                For the
                                                                                                                 Period
The following per share data and ratios have been derived                                                       Mar. 27,
from information provided in the financial statements.                                                         1992++ to
                                                                             For the Year Ended July 31,        July 31,
Increase (Decrease) in Net Asset Value:                                  1996      1995      1994      1993       1992
<S>                 <S>                                               <C>        <C>       <C>       <C>        <C>
Per Share           Net asset value, beginning of period              $  10.31   $  10.33  $  10.83  $  10.58   $  10.00
Operating                                                             --------   --------  --------  --------   --------
Performance:        Investment income--net                                 .54        .55       .55       .58        .20
                    Realized and unrealized gain (loss) on
                    investments--net                                      (.03)      (.02)     (.35)      .30        .58
                                                                      --------   --------  --------  --------   --------
                    Total from investment operations                       .51        .53       .20       .88        .78
                                                                      --------   --------  --------  --------   --------
                    Less dividends and distributions:
                      Investment income--net                              (.54)      (.55)     (.55)     (.58)      (.20)
                      Realized gain on investments--net                     --         --        --      (.05)        --
                      In excess of realized gain on
                      investments--net                                      --         --      (.15)       --         --
                                                                      --------   --------  --------  --------   --------
                    Total dividends and distributions                     (.54)      (.55)     (.70)     (.63)      (.20)
                                                                      --------   --------  --------  --------   --------
                    Net asset value, end of period                    $  10.28   $  10.31  $  10.33  $  10.83   $  10.58
                                                                      ========   ========  ========  ========   ========

Total Investment    Based on net asset value per share                   4.98%      5.44%     1.87%     8.71%      7.88%+++
Return:**                                                             ========   ========  ========  ========   ========

Ratios to           Expenses, net of reimbursement                        .84%       .75%      .69%      .45%       .12%*
Average                                                               ========   ========  ========  ========   ========
Net Assets:         Expenses                                              .95%       .92%     1.03%     1.04%      1.18%*
                                                                      ========   ========  ========  ========   ========
                    Investment income--net                               5.16%      5.51%     5.18%     5.56%      5.73%*
                                                                      ========   ========  ========  ========   ========

Supplemental        Net assets, end of period (in thousands)          $  5,884   $  6,936  $  8,810  $ 12,859   $  9,493
Data:                                                                 ========   ========  ========  ========   ========
                    Portfolio turnover                                  53.99%     22.36%    58.67%    23.83%     30.39%
                                                                      ========   ========  ========  ========   ========

                 <FN>
                   *Annualized.
                  **Total investment returns exclude the effects of sales loads.
                  ++Commencement of Operations.
                 +++Aggregate total investment return.

                    See Notes to Financial Statements.
</TABLE>

                                      62
<PAGE>
 
FINANCIAL INFORMATION (continued)


Financial Highlights (continued)

<TABLE>
<CAPTION>
                                                                                             Class B
                                                                                                                For the
                                                                                                                 Period
The following per share data and ratios have been derived                                                       Mar. 27,
from information provided in the financial statements.                                                         1992++ to
                                                                             For the Year Ended July 31,        July 31,
Increase (Decrease) in Net Asset Value:                                  1996      1995      1994      1993       1992
<S>                 <S>                                               <C>        <C>       <C>       <C>        <C>
Per Share           Net asset value, beginning of period              $  10.31   $  10.33  $  10.83  $  10.58   $  10.00
Operating                                                             --------   --------  --------  --------   --------
Performance:        Investment income--net                                 .48        .50       .50       .53        .18
                    Realized and unrealized gain (loss) on
                    investments--net                                      (.03)      (.02)     (.35)      .30        .58
                                                                      --------   --------  --------  --------   --------
                    Total from investment operations                       .45        .48       .15       .83        .76
                                                                      --------   --------  --------  --------   --------
                    Less dividends and distributions:
                      Investment income--net                              (.48)      (.50)     (.50)     (.53)      (.18)
                      Realized gain on investments--net                     --         --        --      (.05)        --
                      In excess of realized gain on
                      investments--net                                      --         --      (.15)       --         --
                                                                      --------   --------  --------  --------   --------
                    Total dividends and distributions                     (.48)      (.50)     (.65)     (.58)      (.18)
                    Net asset value, end of period                    $  10.28   $  10.31  $  10.33  $  10.83   $  10.58
                                                                      ========   ========  ========  ========   ========

Total Investment    Based on net asset value per share                   4.44%      4.91%     1.35%     8.16%      7.69%+++
Return:**                                                             ========   ========  ========  ========   ========

Ratios to           Expenses, net of reimbursement                       1.35%      1.27%     1.21%      .96%       .62%*
Average                                                               ========   ========  ========  ========   ========
Net Assets:         Expenses                                             1.46%      1.44%     1.54%     1.55%      1.70%*
                                                                      ========   ========  ========  ========   ========
                    Investment income--net                               4.64%      5.00%     4.70%     5.03%      5.13%*
                                                                      ========   ========  ========  ========   ========

Supplemental        Net assets, end of period (in thousands).         $ 48,696   $ 52,023  $ 56,960  $ 54,921   $ 32,686
Data:                                                                 ========   ========  ========  ========   ========
                    Portfolio turnover                                  53.99%     22.36%    58.67%    23.83%     30.39%
                                                                      ========   ========  ========  ========   ========

                 <FN>
                   *Annualized.
                  **Total investment returns exclude the effects of sales loads.
                  ++Commencement of Operations.
                 +++Aggregate total investment return.

                    See Notes to Financial Statements.
</TABLE>

                                      63
<PAGE>
 
FINANCIAL INFORMATION (concluded)

Financial Highlights (concluded)

<TABLE>
<CAPTION>
                                                                                     Class C               Class D
                                                                                         For the                For the
                                                                              For the    Period      For the    Period
The following per share data and ratios have been derived                       Year     Oct. 21,      Year     Oct. 21,
from information provided in the financial statements.                         Ended    1994++ to     Ended    1994++ to
                                                                              July 31,   July 31,    July 31,   July 31,
Increase (Decrease) in Net Asset Value:                                         1996       1995        1996       1995
<S>                 <S>                                                       <C>        <C>         <C>        <C>
Per Share           Net asset value, beginning of period                      $  10.31   $   9.99    $  10.31   $   9.99
Operating                                                                     --------   --------    --------   --------
Performance:        Investment income--net                                         .47        .37         .53        .41
                    Realized and unrealized gain (loss) on investments--net       (.03)       .32        (.03)       .32
                                                                              --------   --------    --------   --------
                    Total from investment operations                               .44        .69         .50        .73
                                                                              --------   --------    --------   --------
                    Less dividends from investment income--net                    (.47)      (.37)       (.53)      (.41)
                                                                              --------   --------    --------   --------
                    Net asset value, end of period                            $  10.28   $  10.31    $  10.28   $  10.31
                                                                              ========   ========    ========   ========

Total Investment    Based on net asset value per share                           4.33%      7.13%+++    4.88%      7.57%+++
Return:**                                                                     ========   ========    ========   ========


Ratios to           Expenses, net of reimbursement                               1.48%      1.46%*       .94%       .92%*
Average                                                                       ========   ========    ========   ========
Net Assets:         Expenses                                                     1.57%      1.61%*      1.05%      1.07%*
                                                                              ========   ========    ========   ========
                    Investment income--net                                       4.50%      4.70%*      5.05%      5.27%*
                                                                              ========   ========    ========   ========

Supplemental        Net assets, end of period (in thousands)                  $  1,219   $    375    $    684   $    796
Data:                                                                         ========   ========    ========   ========
                    Portfolio turnover                                          53.99%     22.36%      53.99%     22.36%
                                                                              ========   ========    ========   ========

                 <FN>
                   *Annualized.
                  **Total investment returns exclude the effects of sales loads.
                  ++Commencement of Operations.
                 +++Aggregate total investment return.

                    See Notes to Financial Statements.
</TABLE>

                                      64
<PAGE>
 
NOTES TO FINANCIAL STATEMENTS


1. Significant Accounting Policies:
Merrill Lynch Minnesota Municipal Bond Fund (the "Fund") is part of
Merrill Lynch Multi-State Municipal Series Trust (the "Trust"). The
Fund is registered under the Investment Company Act of 1940 as a non-
diversified, open-end management investment company. The Fund offers
four classes of shares under the Merrill Lynch Select Pricing SM
System. Shares of Class A and Class D 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 B, Class C and Class D
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. The following is
a summary of significant accounting policies followed by the Fund.

(a) Valuation of investments--Municipal bonds and other portfolio
securities in which the Fund invests are traded primarily in the
over-the-counter municipal bond and money 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 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
settlement prices as of the close of such exchanges. Short-term
investments with remaining maturities 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 Trust, including
valuations furnished by a pricing service retained by the Trust,
which may utilize a matrix system for valuations. The procedures of
the pricing service and its valuations are reviewed by the officers
of the Trust under the general supervision of the Trustees.

(b) Derivative financial instruments--The Fund may engage in various
portfolio strategies to seek to increase its return by hedging its
portfolio against adverse movements in the debt markets. Losses may
arise due to changes in the value of the contract or if the
counterparty does not perform under the contract.

* Financial futures contracts--The Fund may purchase or sell interest
rate futures contracts and options on such futures contracts for the
purpose of hedging the market risk on existing securities or the
intended purchase of securities. 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.

(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). Interest income is recognized on the accrual
basis. Discounts and market premiums are amortized into interest
income. Realized gains and losses on security transactions are
determined on the identified cost basis.

(e) Deferred organization expenses and prepaid registration fees--
Deferred organization expenses are charged to expense on a straight-
line basis over a five-year period. 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 

                                      65
<PAGE>
 
monthly. Distributions of capital gains are recorded on the 
ex-dividend dates. Distributions in excess of realized capital 
gains are due primarily to differing tax treatments for futures 
transactions and post-October losses.

(g) Reclassification--Generally accepted accounting principles
require that certain components of net assets be reclassified to
reflect permanent differences between financial reporting and tax
purposes. Accordingly, current year's permanent book/tax differences
of $102 have been reclassified from paid-in capital in excess of par
to accumulated net realized capital losses. These reclassifications
have no effect on net assets or net asset values per share.

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. The Fund has also entered into a Distribution
Agreement and Distribution Plans with Merrill Lynch Funds
Distributor, Inc. ("MLFD" or "Distributor"), a wholly-owned
subsidiary of Merrill Lynch Group, Inc.

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: 0.55%
of the Fund's average daily net assets not exceeding $500 million;
0.525% of average daily net assets in excess of $500 million but not
exceeding $1 billion; and 0.50% of average daily net assets in
excess of $1 billion. The Investment Advisory Agreement obligates
FAM to reimburse the Fund to the extent the Fund's expenses
(excluding interest, taxes, distribution fees, brokerage fees and
commissions, and extraordinary items) exceed 2.5% of the Fund's
first $30 million of average daily net assets, 2.0% of the next $70
million of average daily net assets, and 1.5% of the average daily
net assets in excess thereof. FAM's obligation to reimburse the Fund
is limited to the amount of the management fee. No fee payment will
be made to FAM during any fiscal year which will cause such expenses
to exceed expense limitations at the time of payment. For the year
ended July 31, 1996, FAM earned fees of $328,665, of which $65,688
was voluntarily waived.

Pursuant to the distribution plans (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 B                                     0.25%          0.25%
Class C                                     0.25%          0.35%
Class D                                     0.10%           --

Pursuant to a sub-agreement with the Distributor, Merrill Lynch,
Pierce, Fenner & Smith Inc. ("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 B, Class C and Class D 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 year ended July 31, 1996, MLFD earned underwriting discounts
and MLPF&S earned dealer concessions on sales of the Fund's Class A
and Class D Shares as follows:

                                         MLFD         MLPF&S

Class A                                  $318        $53,720
Class D                                  $116        $ 6,279

For the year ended July 31, 1996, MLPF&S received contingent
deferred sales charges of $58,961 and $26 relating to transactions
in Class B and Class C Shares, respectively.

Merrill Lynch Financial Data Services, Inc. ("MLFDS"), a wholly-
owned subsidiary of ML & Co., is the Fund's transfer agent.

                                      66
<PAGE>
 
NOTES TO FINANCIAL STATEMENTS (concluded)


Accounting services are provided to the Fund by FAM at cost.

Certain officers and/or trustees of the Fund are officers and/or
directors of FAM, PSI, MLPF&S, MLFDS, MLFD, and/or ML & Co.

3. Investments:
Purchases and sales of investments, excluding short-term securities,
for the year ended July 31, 1996 were $30,696,499 and $35,931,236,
respectively.

Net realized and unrealized gains (losses) as of July 31, 1996 were
as follows:

                                     Realized     Unrealized
                                      Losses        Gains

Long-term investments             $   (45,344)   $ 2,153,767
Financial futures
contracts                            (239,067)        --
                                  -----------    -----------
Total                             $  (284,411)   $ 2,153,767
                                  ===========    ===========

As of July 31, 1996, net unrealized appreciation for Federal income
tax purposes aggregated $2,153,767, of which $2,378,014 related to
appreciated securities and $224,247 related to depreciated
securities. The aggregate cost of investments at July 31, 1996 for
Federal income tax purposes was $54,701,947.

4. Beneficial Interest Transactions:
Net decrease in net assets derived from beneficial interest
transactions was $3,455,361 and $5,201,307 for the years ended July
31, 1996 and July 31, 1995, respectively.

Transactions in shares of beneficial interest for each class were as
follows:


Class A Shares for the Year                         Dollar
Ended July 31, 1996                   Shares        Amount

Shares sold                            27,717    $   288,349
Shares issued to share-
holders in reinvestment
of dividends                           16,771        174,647
                                  -----------    -----------
Total issued                           44,488        462,996
Shares redeemed                      (144,883)    (1,510,591)
                                  -----------    -----------
Net decrease                         (100,395)   $(1,047,595)
                                  ===========    ===========


Class A Shares for the Year                         Dollar
Ended July 31, 1995                   Shares        Amount

Shares sold                            49,385    $   491,560
Shares issued to share-
holders in reinvestment of
dividends                              20,298        204,295
                                  -----------    -----------
Total issued                           69,683        695,855
Shares redeemed                      (249,214)    (2,473,727)
                                  -----------    -----------
Net decrease                         (179,531)   $(1,777,872)
                                  ===========    ===========


Class B Shares for the Year                         Dollar
Ended July 31, 1996                   Shares        Amount

Shares sold                           418,920    $ 4,377,666
Shares issued to share-
holders in reinvestment
of dividends                          126,666      1,318,894
                                  -----------    -----------
Total issued                          545,586      5,696,560
Automatic conversion
of shares                              (6,671)       (68,278)
Shares redeemed                      (848,447)    (8,794,304)
                                  -----------    -----------
Net decrease                         (309,532)   $(3,166,022)
                                  ===========    ===========


Class B Shares for the Year                         Dollar
Ended July 31, 1995                   Shares        Amount

Shares sold                           500,298    $ 5,026,448
Shares issued to share-
holders in reinvestment
of dividends                          145,027      1,460,745
                                  -----------    -----------
Total issued                          645,325      6,487,193
Shares redeemed                    (1,109,526)   (11,061,375)
                                  -----------    -----------
Net decrease                         (464,201)   $(4,574,182)
                                  ===========    ===========


Class C Shares for the Year                         Dollar
Ended July 31, 1996                   Shares        Amount

Shares sold                            87,093    $   913,147
Shares issued to share-
holders in reinvestment
of dividends                            2,971         30,908
                                  -----------    -----------
Total issued                           90,064        944,055
Shares redeemed                        (7,794)       (80,355)
                                  -----------    -----------
Net increase                           82,270    $   863,700
                                  ===========    ===========

                                      67
<PAGE>
 
Class C Shares for the Period
October 21, 1994++ to                               Dollar
July 31, 1995                         Shares        Amount

Shares sold                            38,161    $   389,432
Shares issued to share-
holders in reinvestment of
dividends                                 559          5,738
                                  -----------    -----------
Total issued                           38,720        395,170
Shares redeemed                        (2,374)       (24,700)
                                  -----------    -----------
Net increase                           36,346    $   370,470
                                  ===========    ===========

[FN]
++Commencement of Operations.


Class D Shares for the Year                         Dollar
Ended July 31, 1996                   Shares        Amount

Shares sold                            47,017    $   496,152
Automatic conversion
of shares                               6,666         68,278
Shares issued to share-
holders in reinvestment
of dividends                            1,532         15,967
                                  -----------    -----------
Total issued                           55,215        580,397
Shares redeemed                       (65,910)      (685,841)
                                  -----------    -----------
Net decrease                          (10,695)   $  (105,444)
                                  ===========    ===========


Class D Shares for the Period
October 21, 1994++ to                               Dollar
July 31, 1995                         Shares        Amount

Shares sold                            76,912    $   777,785
Shares issued to share-
holders in reinvestment of
dividends                                 673          6,941
                                  -----------    -----------
Total issued                           77,585        784,726
Shares redeemed                          (428)        (4,449)
                                  -----------    -----------
Net increase                           77,157    $   780,277
                                  ===========    ===========

[FN]
++Commencement of Operations.

5. Capital Loss Carryforward:
At July 31, 1996, the Fund had a net capital loss carryforward of
approximately $1,168,000, of which $881,000 expires in 2003 and
$287,000 expires in 2004. This amount will be available to offset
like amounts of any future taxable gains.

                                      68
<PAGE>
 
 
 
 
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                                       69
<PAGE>
 
 
 
 
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                                       70
<PAGE>
 
 
 
 
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                                       71
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>   
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Investment Objective and Policies..........................................   2
Description of Municipal Bonds and Temporary Investments...................   5
 Description of Municipal Bonds............................................   6
 Description of Temporary Investments......................................   7
 Repurchase Agreements.....................................................   8
 Financial Futures Transactions and Options................................   9
Investment Restrictions....................................................  14
Management of the Trust....................................................  16
 Trustees and Officers.....................................................  16
 Compensation of Trustees..................................................  18
 Management and Advisory Arrangements......................................  19
Purchase of Shares.........................................................  20
 Initial Sales Charge Alternatives--Class A and Class D Shares.............  21
 Reduced Initial Sales Charges.............................................  22
 Distribution Plans........................................................  24
 Limitations on the Payment of Deferred Sales Charges......................  25
Redemption of Shares.......................................................  26
 Deferred Sales Charges--Class B and Class C Shares........................  26
Portfolio Transactions.....................................................  27
Determination of Net Asset Value...........................................  28
Shareholder Services.......................................................  29
 Investment Account........................................................  29
 Automatic Investment Plans................................................  30
 Automatic Reinvestment of Dividends and Capital Gains Distributions.......  30
 Systematic Withdrawal Plans--Class A and Class D Shares...................  30
 Exchange Privilege........................................................  31
Distributions and Taxes....................................................  34
 Environmental Tax.........................................................  37
 Tax Treatment of Option and Futures Transactions..........................  38
Performance Data...........................................................  39
General Information........................................................  41
 Description of Shares.....................................................  41
 Computation of Offering Price Per Share...................................  43
 Independent Auditors......................................................  43
 Custodian.................................................................  43
 Transfer Agent............................................................  43
 Legal Counsel.............................................................  44
 Reports to Shareholders...................................................  44
 Additional Information....................................................  44
Appendix I--Economic Conditions in Minnesota...............................  45
Appendix II--Ratings of Municipal Bonds....................................  47
Independent Auditors' Report...............................................  56
Financial Statements.......................................................  57
</TABLE>    
                                                             
                                                          Code # 16186-1096     
 
[LOGO] MERRILL LYNCH 
 
Merrill Lynch
Minnesota Municipal
Bond Fund
Merrill Lynch Multi-State
Municipal Series Trust

[ART]

STATEMENT OF
ADDITIONAL
INFORMATION

   
October 29, 1996     

Distributor:
Merrill Lynch
Funds Distributor, Inc. 
<PAGE>
 
                           PART C. OTHER INFORMATION
 
ITEM 24. FINANCIAL STATEMENTS AND EXHIBITS.
 
  (A)FINANCIAL STATEMENTS
 
    Contained in Part A:
        
     Financial Highlights for each of the years in the four-year period
      ended July 31, 1996 and for the period March 27, 1992 (commencement
      of operations) to July 31, 1992.     
 
    Contained in Part B:
        
     Schedule of Investments as of July 31, 1996.     
        
     Statement of Assets and Liabilities as of July 31, 1996.     
        
     Statement of Operations for the year ended July 31, 1996.     
        
     Statements of Changes in Net Assets for each of the years in the two-
      year period ended July 31, 1996.     
        
     Financial Highlights for each of the years in the four-year period
      ended July 31, 1996 and for the period March 27, 1992 (commencement
      of operations) to July 31, 1992.     
 
  (B)EXHIBITS
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER
 -------
 <C>     <S>
   1(a)  --Declaration of Trust of the Registrant, dated August 2, 1985.(a)
    (b)  --Amendment to Declaration of Trust, dated September 18, 1987.(a)
    (c)  --Amendment to Declaration of Trust, dated December 21, 1987.(a)
    (d)  --Amendment to Declaration of Trust, dated October 3, 1988.(a)
    (e)  --Amendment to Declaration of Trust, dated October 17, 1994 and
          instrument establishing Class C and Class D shares of beneficial
          interest.(a)
    (f)  --Instrument establishing Merrill Lynch Minnesota Municipal Bond Fund
          (the "Fund") as a series of Registrant.(a)
    (g)  --Instrument establishing Class A and Class B shares of beneficial
          interest of the Fund.(a)
   2     --By-Laws of Registrant.(a)
   3     --None.
   4     --Portions of the Declaration of Trust, Establishment and Designation
          and By-Laws of the Registrant defining the rights of holders of the
          Fund as a series of the Registrant.(b)
   5(a)  --Form of Management Agreement between Registrant and Fund Asset
          Management, Inc.(a)
    (b)  --Supplement to Management Agreement between Registrant and Fund Asset
          Management, Inc.(d)
   6(a)  --Form of Revised Class A Shares Distribution Agreement between
          Registrant and Merrill Lynch Funds Distributor, Inc. (including Form
          of Selected Dealers Agreement).(d)
    (b)  --Form of Class B Shares Distribution Agreement between Registrant and
          Merrill Lynch Funds Distributor, Inc.(a)
    (c)  --Form of Class C Shares Distribution Agreement between Registrant and
          Merrill Lynch Funds Distributor, Inc. (including Form of Selected
          Dealers Agreement).(d)
    (d)  --Form of Class D Shares Distribution Agreement between Registrant and
          Merrill Lynch Funds Distributor, Inc. (including Form of Selected
          Dealers Agreement).(d)
    (e)  --Letter Agreement between the Fund and Merrill Lynch Funds
          Distributor, Inc., dated September 15, 1993, in connection with the
          Merrill Lynch Mutual Fund Adviser program.(c)
   7     --None.
   8     --Form of Custody Agreement between Registrant and State Street Bank &
          Trust Company.(d)
   9     --Form of Transfer Agency, Dividend Disbursing Agency and Shareholder
          Servicing Agency Agreement between Registrant and Merrill Lynch
          Financial Data Services, Inc. (formerly Financial Data Services,
          Inc.)(e)
</TABLE>    
 
                                      C-1
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER
 -------
 <C>     <S>
     10  --Opinion of Brown & Wood LLP, counsel for the Registrant.
     11  --Consent of Deloitte & Touche LLP, independent auditors for the
          Registrant.
     12  --None.
     13  --Certificate of Fund Asset Management, Inc.(a)
     14  --None.
  15(a)  --Amended and Restated Class B Shares Distribution Plan of the
          Registrant and Amended and Restated Class B Shares Distribution Plan
          Sub-Agreement.(c)
    (b)  --Form of Class C Shares Distribution Plan and Class C Shares
          Distribution Plan Sub-Agreement of Registrant.(d)
    (c)  --Form of Class D Shares Distribution Plan and Class D Shares
          Distribution Plan Sub-Agreement of Registrant.(d)
  16(a)  --Schedule for computation of each performance quotation provided in
          the Registration Statement in response to Item 22 relating to Class A
          Shares.(a)
    (b)  --Schedule for computation of each performance quotation provided in
          the Registration Statement in response to Item 22 relating to Class B
          Shares.(a)
    (c)  --Schedule for computation of each performance quotation provided in
          the Registration Statement in response to Item 22 relating to Class C
          Shares.(a)
    (d)  --Schedule for computation of each performance quotation provided in
          the Registration Statement in response to Item 22 relating to Class D
          Shares.(a)
  17(a)  --Financial Data Schedule for Class A shares.
    (b)  --Financial Data Schedule for Class B shares.
    (c)  --Financial Data Schedule for Class C shares.
    (d)  --Financial Data Schedule for Class D shares.
     18  --Merrill Lynch Select PricingSM System Plan Pursuant to Rule 18f-
          3.(f)
</TABLE>    
- --------
   
(a) Filed on November 2, 1995 as an Exhibit to Post-Effective Amendment No. 4
    to Registrant's Registration Statement on Form N-1A under the Securities
    Act of 1933, as amended (File No. 33-44734) (the "Registration Statement").
           
(b) Reference is made to Article II, Section 2.3 and Articles V, VI, VIII, IX,
    X and XI of the Registrant's Declaration of Trust, as amended, filed as
    Exhibits 1(a), 1(b), 1(c), 1(d) and 1(e) with Post-Effective Amendment No.
    4 to the Registration Statement; to the Certificates of Establishment and
    Designation establishing the Fund as a series of the Registrant and
    establishing Class A and Class B shares of beneficial interest of the Fund,
    filed as Exhibits 1(f) and 1(g), respectively, with Post-Effective
    Amendment No. 4 to the Registration Statement; and to Articles I, V and VI
    of the Registrant's By-Laws, filed as Exhibit 2 with Post-Effective
    Amendment No. 4 to the Registration Statement.     
   
(c) Filed on November 24, 1993 as an Exhibit to Post-Effective Amendment No. 2
    to the Registration Statement.     
   
(d) Filed on October 14, 1994 as an Exhibit to Post-Effective Amendment No. 3
    to the Registration Statement.     
(e) Incorporated by reference to Exhibit 9 to Post-Effective Amendment No. 5 to
    Registrant's Registration Statement on Form N-1A under the Securities Act
    of 1933, as amended, filed on October 20, 1995, relating to shares of
    Merrill Lynch Arizona Municipal Bond Fund series of the Registrant (File
    No. 33-41311).
   
(f) Incorporated by reference to Exhibit 18 to Post-Effective Amendment No. 13
    to Registrant's Registration Statement on Form N-1A under the Securities
    Act of 1933, as amended, filed on January 25, 1996, relating to shares of
    Merrill Lynch New York Municipal Bond Fund series of the Registrant (File
    No. 2-99473).     
 
ITEM 25. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT.
 
  Registrant is not controlled by or under common control with any other
person.
 
                                      C-2
<PAGE>
 
ITEM 26. NUMBER OF HOLDERS OF SECURITIES.
<TABLE>       
<CAPTION>
                                                                NUMBER OF
                                                            RECORD HOLDERS AT
                         TITLE OF CLASS                    SEPTEMBER 30, 1996*
                         --------------                    -------------------
      <S>                                                  <C>
      Class A Shares of beneficial interest, par value
       $0.10 per share....................................          203
      Class B Shares of beneficial interest, par value
       $0.10 per share....................................        1,752
      Class C Shares of beneficial interest, par value
       $0.10 per share....................................           51
      Class D Shares of beneficial interest, par value
       $0.10 per share....................................           30
</TABLE>    
- --------
* The number of holders includes holders of record plus beneficial owners whose
  shares are held of record by Merrill Lynch, Pierce, Fenner & Smith
  Incorporated.
 
ITEM 27. INDEMNIFICATION.
 
  Section 5.3 of the Registrant's Declaration of Trust provides as follows:
 
  "The Trust shall indemnify each of its Trustees, officers, employees and
agents (including persons who serve at its request as directors, officers or
trustees of another organization in which it has any interest as a shareholder,
creditor or otherwise) against all liabilities and expenses (including amounts
paid in satisfaction of judgments, in compromise, as fines and penalties and as
counsel fees) reasonably incurred by him in connection with the defense or
disposition of any action, suit or other proceeding, whether civil or criminal,
in which he may be involved or with which he may be threatened, while in office
or thereafter, by reason of his being or having been such a trustee, officer,
employee or agent, except with respect to any matter as to which he shall have
been adjudicated to have acted in bad faith, willful misfeasance, gross
negligence or reckless disregard of his duties; provided, however, that as to
any matter disposed of by a compromise payment by such person, pursuant to a
consent decree or otherwise, no indemnification either for said payment or for
any other expenses shall be provided unless the Trust shall have received a
written opinion from independent legal counsel approved by the Trustees to the
effect that if either the matter of willful misfeasance, gross negligence or
reckless disregard of duty, or the matter of good faith and reasonable belief
as to the best interests of the Trust, had been adjudicated, it would have been
adjudicated in favor of such person. The rights accruing to any Person under
these provisions shall not exclude any other right to which he may be lawfully
entitled; provided that no person may satisfy any right in indemnity or
reimbursement granted herein or in Section 5.1 or to which he may be otherwise
entitled except out of the property of the Trust, and no Shareholder shall be
personally liable to any Person with respect to any claim for indemnity or
reimbursement or otherwise. The Trustees may make advance payments in
connection with indemnification under this Section 5.3, provided that the
indemnified person shall have given a written undertaking to reimburse the
Trust in the event it is subsequently determined that he is not entitled to
such indemnification."
   
  Insofar as the conditional advancing of indemnification monies for actions
based upon the Investment Company Act of 1940, as amended, may be concerned,
such payments will be made only on the following conditions: (i) the advances
must be limited to amounts used, or to be used, for the preparation or
presentation of a defense to the action, including costs connected with the
preparation of a settlement; (ii) advances may be made only upon receipt of a
written promise by, or on behalf of, the recipient to repay that amount of the
advance which exceeds the amount which it is ultimately determined he is
entitled to receive from the Registrant by reason of indemnification; and (iii)
(a) such promise must be secured by a surety bond, other suitable insurance or
an equivalent form of security which assures that any repayments may be
obtained by the Registrant without delay or litigation, which bond, insurance
or other form of security must be provided by the recipient of the advance, or
(b) a majority of a quorum of the Registrant's disinterested, non-party
Trustees, or an independent legal counsel in a written opinion, shall
determine, based upon a review of readily available facts that the recipient of
the advance ultimately will be found entitled to indemnification.     
 
  In Section 9 of the Distribution Agreements relating to the securities being
offered hereby, the Registrant agrees to indemnify the Distributor and each
person, if any, who controls the Distributor within the meaning of the
Securities Act of 1933 (the "1933 Act"), against certain types of civil
liabilities arising in connection with the Registration Statement or Prospectus
and Statement of Additional Information.
 
                                      C-3
<PAGE>
 
   
  Insofar as indemnification for liabilities arising under the 1933 Act may be
permitted to Trustees, officers and controlling persons of the Registrant and
the principal underwriter pursuant to the foregoing provisions or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the 1933 Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a Trustee, officer, or controlling
person of the Registrant and the principal underwriter in connection with the
successful defense of any action, suit or proceeding) is asserted by such
Trustee, officer or controlling person or the principal underwriter in
connection with the shares being registered, the Registrant will, unless in the
opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the 1933 Act and
will be governed by the final adjudication of such issue.     
 
ITEM 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER.
   
  Fund Asset Management, L.P. (the "Manager" or "FAM") acts as the investment
adviser for the following open-end investment companies: CBA Money Fund, CMA
Government Securities Fund, CMA Money Fund, CMA Multi-State Municipal Series
Trust, CMA Tax-Exempt Fund, CMA Treasury Fund, The Corporate Fund Accumulation
Program, Inc., Financial Institutions Series Trust, Merrill Lynch Basic Value
Fund, Inc., Merrill Lynch California Municipal Series Trust, Merrill Lynch
Corporate Bond Fund, Inc., Merrill Lynch Emerging Tigers Fund, Inc., Merrill
Lynch Federal Securities Trust, Merrill Lynch Funds for Institutions Series,
Merrill Lynch Multi-State Limited Maturity Municipal Series Trust, Merrill
Lynch Multi-State Municipal Series Trust, Merrill Lynch Municipal Bond Fund,
Inc., Merrill Lynch Phoenix Fund, Inc., Merrill Lynch Special Value Fund, Inc.,
Merrill Lynch World Income Fund, Inc. and The Municipal Fund Accumulation
Program, Inc.; and the following closed-end investment companies: Apex
Municipal Fund, Inc., Corporate High Yield Fund, Inc., Corporate High Yield
Fund II, Inc., Income Opportunities Fund 1999, Inc., Income Opportunities Fund
2000, Inc., Merrill Lynch Municipal Strategy Fund, Inc., MuniAssets Fund, Inc.,
MuniEnhanced Fund, Inc., MuniInsured Fund, Inc., MuniVest Fund, Inc., MuniVest
Fund II, Inc., MuniVest California Insured Fund, Inc., MuniVest Florida Fund,
MuniVest Michigan Insured Fund, Inc., MuniVest New Jersey Fund, Inc., MuniVest
New York Insured Fund, Inc., MuniVest Pennsylvania Insured Fund, MuniYield
Arizona Fund, Inc., MuniYield California Fund, Inc., MuniYield California
Insured Fund, Inc., MuniYield California Insured Fund II, Inc., MuniYield
Florida Fund, MuniYield Florida Insured Fund, MuniYield Fund, Inc., MuniYield
Insured Fund, Inc., MuniYield Insured Fund II, Inc., MuniYield Michigan Fund,
Inc., MuniYield Michigan Insured Fund, Inc., MuniYield New Jersey Fund, Inc.,
MuniYield New Jersey Insured Fund, Inc., MuniYield New York Insured Fund, Inc.,
MuniYield New York Insured Fund II, Inc., MuniYield New York Insured Fund III,
Inc., MuniYield Pennsylvania Fund, MuniYield Quality Fund, Inc., MuniYield
Quality Fund II, Inc., Senior High Income Portfolio, Inc., Taurus
MuniCalifornia Holdings, Inc., Taurus MuniNewYork Holdings, Inc. and Worldwide
DollarVest Fund, Inc.     
   
  Merrill Lynch Asset Management, L.P. ("MLAM"), an affiliate of the Manager,
acts as the investment adviser for the following open-end investment companies:
Merrill Lynch Adjustable Rate Securities Fund, Inc., Merrill Lynch Americas
Income Fund, Inc., Merrill Lynch Asset Builder Program, Inc., Merrill Lynch
Asset Growth Fund, Inc., Merrill Lynch Asset Income Fund, Inc., Merrill Lynch
Capital Fund, Inc., Merrill Lynch Developing Capital Markets Fund, Inc.,
Merrill Lynch Dragon Fund, Inc., Merrill Lynch EuroFund, Merrill Lynch
Fundamental Growth Fund, Inc., Merrill Lynch Fund For Tomorrow, Inc., Merrill
Lynch Global Allocation Fund, Inc., Merrill Lynch Global Bond Fund for
Investment and Retirement, Merrill Lynch Global Convertible Fund, Inc., Merrill
Lynch Global Holdings, Inc., Merrill Lynch Global Resources Trust, Merrill
Lynch Global SmallCap Fund, Inc., Merrill Lynch Global Utility Fund, Inc.,
Merrill Lynch Global Value Fund, Inc., Merrill Lynch Growth Fund, Merrill Lynch
Healthcare Fund, Inc., Merrill Lynch Institutional Intermediate Fund, Merrill
Lynch International Equity Fund, Merrill Lynch Latin America Fund, Inc.,
Merrill Lynch Middle East/Africa Fund, Inc., Merrill Lynch Municipal Series
Trust, Merrill     
 
                                      C-4
<PAGE>
 
Lynch Pacific Fund, Inc., Merrill Lynch Ready Assets Trust, Merrill Lynch
Retirement Series Trust, Merrill Lynch Series Fund, Inc., Merrill Lynch Short-
Term Global Income Fund, Inc., Merrill Lynch Strategic Dividend Fund, Merrill
Lynch Technology Fund, Inc., Merrill Lynch U.S.A. Government Reserves, Merrill
Lynch U.S. Treasury Money Fund, Merrill Lynch Utility Income Fund, Inc. and
Merrill Lynch Variable Series Funds, Inc. and the following closed-end
investment companies: Convertible Holdings, Inc. Merrill Lynch High Income
Municipal Bond Fund, Inc. and Merrill Lynch Senior Floating Rate Fund, Inc.
   
  The address of each of these investment companies is P.O. Box 9011,
Princeton, New Jersey 08543-9011, except that the address of Merrill Lynch
Funds for Institutions Series and Merrill Lynch Institutional Intermediate Fund
is One Financial Center, 15th Floor, Boston, Massachusetts 02111-2646. The
address of the Manager, MLAM, Princeton Services, Inc. ("Princeton Services")
and Princeton Administrators, L.P. is also P.O. Box 9011, Princeton, New Jersey
08543-9011. The address of Merrill Lynch Funds Distributor, Inc. (MLFD) is P.O.
Box 9081, Princeton, New Jersey 08543-9081. The address of Merrill Lynch,
Pierce, Fenner & Smith Incorporated ("Merrill Lynch") and Merrill Lynch & Co.,
Inc. ("ML & Co.") is World Financial Center, North Tower, 250 Vesey Street, New
York, New York 10281. The address of the Fund's transfer agent, Merrill Lynch
Financial Data Services, Inc. ("MLFDS"), is 4800 Deer Lake Drive East,
Jacksonville, Florida 32246-6484.     
   
  Set forth below is a list of each executive officer and partner of the
Manager indicating each business, profession, vocation or employment of a
substantial nature in which each such person or entity has been engaged since
August 1, 1994 for his or its own account or in the capacity of director,
officer, partner or trustee. In addition, Mr. Zeikel is President, Mr. Glenn is
Executive Vice President and Mr. Richard is Treasurer of substantially all of
the investment companies described in the first two paragraphs of this Item and
Messrs. Giordano, Harvey, Hewitt, Kirstein and Monagle are directors, trustees
or officers of one or more of such companies.     
 
  Officers and partners of FAM are set forth as follows:
 
<TABLE>   
<CAPTION>
                                                           OTHER SUBSTANTIAL BUSINESS,
           NAME           POSITION(S) WITH THE MANAGER PROFESSION, VOCATION OR EMPLOYMENT
           ----           ---------------------------- ----------------------------------
 <C>                      <C>                          <S>
 ML & Co. ...............    Limited Partner              Financial Services Holding
                                                           Company; Limited Partner of
                                                           MLAM
 Princeton Services......    General Partner              General Partner of MLAM
 Arthur Zeikel...........    President                    President of MLAM; President
                                                           and Director of Princeton
                                                           Services; Director of MLFD;
                                                           Executive Vice President of
                                                           ML & Co.
 Terry K. Glenn..........    Executive Vice               Executive Vice President of
                              President                    MLAM; Executive Vice
                                                           President and Director of
                                                           Princeton Services;
                                                           President and Director of
                                                           MLFD; Director of MLFDS;
                                                           President of Princeton
                                                           Administrators, L.P.
 Vincent R. Giordano.....    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 Elizabeth Griffin.......    Senior Vice President        Senior Vice President of MLAM
 Norman R. Harvey........    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 Michael J. Hennewinkel..    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 N. John Hewitt..........    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
</TABLE>    
 
                                      C-5
<PAGE>
 
<TABLE>   
<CAPTION>
                                                           OTHER SUBSTANTIAL BUSINESS,
           NAME           POSITION(S) WITH THE MANAGER PROFESSION, VOCATION OR EMPLOYMENT
           ----           ---------------------------- ----------------------------------
 <C>                      <C>                          <S>
 Philip L. Kirstein......    Senior Vice                  Senior Vice President,
                              President, General           General Counsel and
                              Counsel and                  Secretary of MLAM; Senior
                              Secretary                    Vice President, General
                                                           Counsel, Secretary and
                                                           Director of Princeton
                                                           Services; Director of MLFD
 Ronald M. Kloss.........    Senior Vice President        Senior Vice President and
                              and Controller               Controller of MLAM; Senior
                                                           Vice President and
                                                           Controller of Princeton
                                                           Services
 Stephen M.M. Miller.....    Senior Vice President        Executive Vice President of
                                                           Princeton Administrators,
                                                           L.P.; Senior Vice President
                                                           of Princeton Services
 Joseph T. Monagle, Jr. .    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 Michael L. Quinn........    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services;
                                                           Managing Director and First
                                                           Vice President of Merrill
                                                           Lynch from 1989 to 1995
 Richard L. Reller.......    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 Gerald M. Richard.......    Senior Vice President        Senior Vice President and
                              and Treasurer                Treasurer of MLAM; Senior
                                                           Vice President and
                                                           Treasurer of Princeton
                                                           Services; Vice President
                                                           and Treasurer of MLFD
 Ronald L. Welburn.......    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 Anthony Wiseman.........    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
</TABLE>    
 
ITEM 29. PRINCIPAL UNDERWRITERS.
   
  (a) MLFD acts as the principal underwriter for the Registrant and for each of
the open-end investment companies referred to in the first two paragraphs of
Item 28 except CBA Money Fund, CMA Government Securities Fund, CMA Money Fund,
CMA Multi-State Municipal Series Trust, CMA Tax-Exempt Fund, CMA Treasury Fund,
The Corporate Fund Accumulation Program, Inc., and The Municipal Fund
Accumulation Program, Inc. and MLFD also acts as the principal underwriter for
the following closed-end investment companies: Merrill Lynch High Income
Municipal Bond Fund, Inc., Merrill Lynch Municipal Strategy Fund, Inc. and
Merrill Lynch Senior Floating Rate Fund, Inc.     
   
  (b) Set forth below is information concerning each director and officer of
MLFD. The principal business address of each such person is P.O. Box 9011,
Princeton, New Jersey 08543-9011, except that the address of Messrs. Aldrich,
Brady, Breen, Crook, Fatseas and Wasel is One Financial Center, Boston,
Massachusetts 02111-2646.     
 
<TABLE>
<CAPTION>
                                         (2)                     (3)
          (1)                  POSITION(S) AND OFFICES POSITION(S) AND OFFICES
         NAME                         WITH MLFD            WITH REGISTRANT
         ----                  ----------------------- -----------------------
<S>                            <C>                     <C>
Terry K. Glenn................ President and Director  Executive Vice President
Arthur Zeikel................. Director                President and Trustee
Philip L. Kirstein............ Director                None
</TABLE>
 
                                      C-6
<PAGE>
 
<TABLE>   
<CAPTION>
                                       (2)                        (3)
          (1)                POSITION(S) AND OFFICES    POSITION(S) AND OFFICES
         NAME                       WITH MLFD               WITH REGISTRANT
         ----                -----------------------    -----------------------
<S>                        <C>                          <C>
William E. Aldrich........ Senior Vice President        None
Robert W. Crook........... Senior Vice President        None
Kevin P. Boman............ Vice President               None
Michael J. Brady.......... Vice President               None
William M. Breen.......... Vice President               None
Mark A. DeSario........... Vice President               None
James T. Fatseas.......... Vice President               None
Debra W. Landsman-Yaros... Vice President               None
Michelle T. Lau........... Vice President               None
Gerald M. Richard......... Vice President and Treasurer Treasurer
Salvatore Venezia......... Vice President               None
William Wasel............. Vice President               None
Robert Harris............. Secretary                    None
</TABLE>    
 
  (c) Not applicable.
 
ITEM 30. LOCATION OF ACCOUNTS AND RECORDS.
   
  All accounts, books and other documents required to be maintained by Section
31(a) of the Investment Company Act of 1940, as amended, and the rules
thereunder are maintained at the offices of the Registrant, 800 Scudders Mill
Road, Plainsboro, New Jersey 08536, and Merrill Lynch Financial Data Services,
Inc., 4800 Deer Lake Drive East, Jacksonville, Florida 32246-6484.     
 
ITEM 31. MANAGEMENT SERVICES.
 
  Other than as set forth under the caption "Management of the Trust--
Management and Advisory Arrangements" in the Prospectus constituting Part A of
the Registration Statement and under "Management of the Trust--Management and
Advisory Arrangements" in the Statement of Additional Information constituting
Part B of the Registration Statement, Registrant is not a party to any
management-related service contract.
 
ITEM 32. UNDERTAKINGS.
 
  (a) Not applicable.
 
  (b) Not applicable.
 
  (c) Registrant undertakes to furnish each person to whom a Prospectus is
delivered with a copy of the Registrant's latest annual report to shareholders,
upon request and without charge.
 
                                      C-7
<PAGE>
 
                                   SIGNATURES
   
  Pursuant to the requirements of the Securities Act of 1933 and the Investment
Company Act of 1940, the Registrant certifies that it meets all of the
requirements for effectiveness of this Post-Effective Amendment to its
Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933
and has duly caused this Amendment to its Registration Statement to be signed
on its behalf by the undersigned, thereunto duly authorized, in the Township of
Plainsboro, and the State of New Jersey, on the 25th day of October, 1996.     
 
                                          Merrill Lynch Multi-State Municipal
                                           Series Trust
                                                      (Registrant)
                                                   
                                                /s/ Gerald M. Richard     
                                          By: _________________________________
                                                 
                                              (GERALD M. RICHARD, TREASURER)
                                                               
  Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed below by the following persons in the capacities and
on the date(s) indicated.
 
              SIGNATURE                         TITLE                DATE
 
           Arthur Zeikel*               President and
- -------------------------------------    Trustee
           (ARTHUR ZEIKEL)               (Principal Executive Officer)
 
                                        Treasurer (Principal Financial
     /s/ Gerald M. Richard               and Accounting
                                         Officer)
                                                                    
                                                                 October 25,
- -------------------------------------                             1996     
         (GERALD M. RICHARD)
 
         James H. Bodurtha*             Trustee                         
- -------------------------------------                                    
         (JAMES H. BODURTHA)
 
         Herbert I. London*             Trustee
- -------------------------------------
         (HERBERT I. LONDON)
 
          Robert R. Martin*             Trustee
- -------------------------------------
         (ROBERT R. MARTIN)
 
           Joseph L. May*               Trustee
- -------------------------------------
           (JOSEPH L. MAY)
 
          Andre F. Perold*              Trustee
- -------------------------------------
          (ANDRE F. PEROLD)
                                                                 
     /s/ Gerald M. Richard                                       October 25,
*By: ________________________________                             1996     
     
  (GERALD M. RICHARD, ATTORNEY-IN-
             FACT)     
 
                                      C-8
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER                             DESCRIPTION
 -------                            -----------
 <C>     <S>
  10     --Opinion of Brown & Wood LLP, counsel for the Registrant.
  11     --Consent of Deloitte & Touche LLP, independent auditors for the
          Registrant.
  17(a)  --Financial Data Schedule for Class A shares.
    (b)  --Financial Data Schedule for Class B shares.
    (c)  --Financial Data Schedule for Class C shares.
    (d)  --Financial Data Schedule for Class D shares.
</TABLE>    
<PAGE>
 
APPENDIX FOR GRAPHIC AND IMAGE MATERIAL

        Pursuant to Rule 304 of Regulation S-T, the following table presents 
fair and accurate narrative descriptions of graphic and image material omitted
from this EDGAR Submission file due to ASCII-incompatibility and cross-
references this material to the location of each occurrence in the text.

DESCRIPTION OF OMITTED                          LOCATION OF GRAPHIC
  GRAPHIC OR IMAGE                               OR IMAGE IN TEXT
- ----------------------                          -------------------
Compass plate, circular                     Back cover of Prospectus and
graph paper and Merrill Lynch                back cover of Statement of
logo including stylized market                  Additional Information
bull

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 1
   <NAME> MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND- CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1996
<PERIOD-START>                             AUG-01-1995
<PERIOD-END>                               JUL-31-1996
<INVESTMENTS-AT-COST>                         54701947
<INVESTMENTS-AT-VALUE>                        56855714
<RECEIVABLES>                                   996924
<ASSETS-OTHER>                                   73137
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                57925775
<PAYABLE-FOR-SECURITIES>                       1061128
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       381300
<TOTAL-LIABILITIES>                            1442428
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      56369329
<SHARES-COMMON-STOCK>                           572608
<SHARES-COMMON-PRIOR>                           673003
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (1229809)
<OVERDISTRIBUTION-GAINS>                      (809940)
<ACCUM-APPREC-OR-DEPREC>                       2153767
<NET-ASSETS>                                   5884357
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              3589994
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (773574)
<NET-INVESTMENT-INCOME>                        2816420
<REALIZED-GAINS-CURRENT>                      (284411)
<APPREC-INCREASE-CURRENT>                        93704
<NET-CHANGE-FROM-OPS>                          2625713
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (331165)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          27717
<NUMBER-OF-SHARES-REDEEMED>                   (144883)
<SHARES-REINVESTED>                              16771
<NET-CHANGE-IN-ASSETS>                       (3646068)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                     (945500)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (809940)
<GROSS-ADVISORY-FEES>                           328665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 839262
<AVERAGE-NET-ASSETS>                           6404038
<PER-SHARE-NAV-BEGIN>                            10.31
<PER-SHARE-NII>                                    .54
<PER-SHARE-GAIN-APPREC>                          (.03)
<PER-SHARE-DIVIDEND>                             (.54)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.28
<EXPENSE-RATIO>                                    .95
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 2
   <NAME> MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND-CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1996
<PERIOD-START>                             AUG-01-1995
<PERIOD-END>                               JUL-31-1996
<INVESTMENTS-AT-COST>                         54701947
<INVESTMENTS-AT-VALUE>                        56855714
<RECEIVABLES>                                   996924
<ASSETS-OTHER>                                   73137
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                57925775
<PAYABLE-FOR-SECURITIES>                       1061128
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       381300
<TOTAL-LIABILITIES>                            1442428
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      56369329
<SHARES-COMMON-STOCK>                          4738076
<SHARES-COMMON-PRIOR>                          5047608
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (1229809)
<OVERDISTRIBUTION-GAINS>                      (809940)
<ACCUM-APPREC-OR-DEPREC>                       2153767
<NET-ASSETS>                                  48696225
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              3589994
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (773574)
<NET-INVESTMENT-INCOME>                        2816420
<REALIZED-GAINS-CURRENT>                      (284411)
<APPREC-INCREASE-CURRENT>                        93704
<NET-CHANGE-FROM-OPS>                          2625713
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (2408920)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         418920
<NUMBER-OF-SHARES-REDEEMED>                   (855118)
<SHARES-REINVESTED>                             126666
<NET-CHANGE-IN-ASSETS>                       (3646068)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                     (945500)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (809940)
<GROSS-ADVISORY-FEES>                           328665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 839262
<AVERAGE-NET-ASSETS>                          51746633
<PER-SHARE-NAV-BEGIN>                            10.31
<PER-SHARE-NII>                                    .48
<PER-SHARE-GAIN-APPREC>                          (.03)
<PER-SHARE-DIVIDEND>                             (.48)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.28
<EXPENSE-RATIO>                                   1.46
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6

<SERIES>
   <NUMBER> 3
   <NAME> MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND-CLASS C
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1996
<PERIOD-START>                             AUG-01-1995
<PERIOD-END>                               JUL-31-1996
<INVESTMENTS-AT-COST>                         54701947
<INVESTMENTS-AT-VALUE>                        56855714
<RECEIVABLES>                                   996924
<ASSETS-OTHER>                                   73137
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                57925775
<PAYABLE-FOR-SECURITIES>                       1061128
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       381300
<TOTAL-LIABILITIES>                            1442428
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      56369329
<SHARES-COMMON-STOCK>                           118616
<SHARES-COMMON-PRIOR>                            36346
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (1229809)
<OVERDISTRIBUTION-GAINS>                      (809940)
<ACCUM-APPREC-OR-DEPREC>                       2153767
<NET-ASSETS>                                   1219215
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              3589994
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (773574)
<NET-INVESTMENT-INCOME>                        2816420
<REALIZED-GAINS-CURRENT>                      (284411)
<APPREC-INCREASE-CURRENT>                        93704
<NET-CHANGE-FROM-OPS>                          2625713
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (40224)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          87093
<NUMBER-OF-SHARES-REDEEMED>                     (7794)
<SHARES-REINVESTED>                               2971
<NET-CHANGE-IN-ASSETS>                       (3646068)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                     (945500)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (809940)
<GROSS-ADVISORY-FEES>                           328665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 839262
<AVERAGE-NET-ASSETS>                            890786
<PER-SHARE-NAV-BEGIN>                            10.31
<PER-SHARE-NII>                                    .47
<PER-SHARE-GAIN-APPREC>                          (.03)
<PER-SHARE-DIVIDEND>                             (.47)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.28
<EXPENSE-RATIO>                                   1.57
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6

<SERIES>
   <NUMBER> 114
   <NAME> MERRILL LYNCH MINNESOTA MUNICIPAL BOND FUND-CLASS D
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1996
<PERIOD-START>                             AUG-01-1995
<PERIOD-END>                               JUL-31-1996
<INVESTMENTS-AT-COST>                         54701947
<INVESTMENTS-AT-VALUE>                        56855714
<RECEIVABLES>                                   996924
<ASSETS-OTHER>                                   73137
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                57925775
<PAYABLE-FOR-SECURITIES>                       1061128
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       381300
<TOTAL-LIABILITIES>                            1442428
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      56369329
<SHARES-COMMON-STOCK>                            66462
<SHARES-COMMON-PRIOR>                            77157
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (1229809)
<OVERDISTRIBUTION-GAINS>                      (809940)
<ACCUM-APPREC-OR-DEPREC>                       2153767
<NET-ASSETS>                                    683550
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              3589994
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (773574)
<NET-INVESTMENT-INCOME>                        2816420
<REALIZED-GAINS-CURRENT>                      (284411)
<APPREC-INCREASE-CURRENT>                        93704
<NET-CHANGE-FROM-OPS>                          2625713
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (36111)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          53683
<NUMBER-OF-SHARES-REDEEMED>                    (65910)
<SHARES-REINVESTED>                               1532
<NET-CHANGE-IN-ASSETS>                       (3646068)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                     (945500)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (809940)
<GROSS-ADVISORY-FEES>                           328665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 839262
<AVERAGE-NET-ASSETS>                            713042
<PER-SHARE-NAV-BEGIN>                            10.31
<PER-SHARE-NII>                                    .53
<PER-SHARE-GAIN-APPREC>                          (.03)
<PER-SHARE-DIVIDEND>                             (.53)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.28
<EXPENSE-RATIO>                                   1.05
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<PAGE>
 
                               BROWN & WOOD LLP
                                                                   EXHIBIT 99.10
                             ONE WORLD TRADE CENTER
                           NEW YORK, N.Y. 10048-0557
                            TELEPHONE: 212-839-5300
                            FACSIMILE: 212-839-5577



                                 October 28, 1996


Merrill Lynch Minnesota Municipal Bond Fund
of Merrill Lynch Multi-State Municipal Series Trust
P.O. Box 9011
Princeton, New Jersey  08543-9011


Ladies and Gentlemen:

     This opinion is furnished in connection with the registration by Merrill
Lynch Multi-State Municipal Series Trust, a Massachusetts business trust (the
"Trust"), of shares of beneficial interest, par value $0.10 per share (the
"Shares") of the Merrill Lynch Minnesota Municipal Bond Fund, a series of the
Trust, under the Securities Act of 1933, as amended, pursuant to a registration
statement on Form N-1A (File No. 33-44734), as amended (the "Registration
Statement"), in the amount set forth under "Amount Being Registered" on the
facing page of the Registration Statement.

     As counsel for the Trust, we are familiar with the proceedings taken by it
in connection with the authorization, issuance and sale of the Shares.  In
addition, we have examined and are familiar with the Declaration of Trust of the
Trust, as amended, the By-Laws of the Trust and such other documents as we have
deemed relevant to the matters referred to in this opinion.
<PAGE>
 
     Based upon the foregoing, we are of the opinion that the Shares, upon
issuance and sale in the manner referred to in the Registration Statement for
consideration not less than the par value thereof, will be legally issued, fully
paid and non-assessable shares of beneficial interest, except that shareholders
of the Trust may under certain circumstances be held personally liable for the
Trust's obligations.

     In rendering this opinion, we have relied as to matters of Massachusetts
law upon an opinion of Bingham, Dana & Gould rendered to the Trust.

     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of our name in the Prospectus and
Statement of Additional Information constituting parts thereof.

                                 Very truly yours,
 
                                 /s/ Brown & Wood

                                       2

<PAGE>
 
                                                                   Exhibit 99.11
 
INDEPENDENT AUDITORS' CONSENT


Merrill Lynch Minnesota Municipal Bond Fund of
Merrill Lynch Multi-State Municipal Series Trust:

We consent to the use in Post-Effective Amendment No. 5 to Registration 
Statement No. 33-44734 of our report dated September 6, 1996 appearing in the 
Statement of Additional Information, which is a part of such Registration 
Statement, and to the reference to us under the caption "Financial Highlights" 
appearing in the Prospectus, which also is a part of such Registration 
Statement.



/s/ Deloitte & Touche LLP
Deloitte & Touche LLP
Princeton, New Jersey
October 25, 1996


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