MERRILL LYNCH OHIO MUNICIPAL BOND FUND OF MLMSMST
485BPOS, 1997-11-14
Previous: ILX INC/AZ/, 10-Q, 1997-11-14
Next: CHARTER ONE FINANCIAL INC, 10-Q, 1997-11-14



<PAGE>
 
    
 AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 14, 1997     
                                                SECURITIES ACT FILE NO. 33-44500
                                        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. 7                         [X]
                                     AND/OR
        REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940      [X]
                                                                             [X]
                             AMENDMENT NO. 152     
                        (Check appropriate box or boxes)
 
                               ----------------
 
                     MERRILL LYNCH OHIO 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:     
           BROWN & WOOD LLP                  PHILIP L. KIRSTEIN, ESQ.
        ONE WORLD TRADE CENTER                FUND ASSET MANAGEMENT
    NEW YORK, NEW YORK 10048-0557                 P.O. BOX 9011
ATTENTION: THOMAS R. SMITH, JR., ESQ.    PRINCETON, NEW JERSEY 08543-9011
       BRIAN M. KAPLOWITZ, ESQ.
 
                               ----------------
 
 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)
                        
                     [X] immediately upon filing pursuant to paragraph (b)
                            
                     [_] on (date) 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.
 
                               ----------------
    
 TITLE OF SECURITIES BEING REGISTERED: Shares of Beneficial Interest, par value
                              $.10 per share.     
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
                   MERRILL LYNCH OHIO 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     Investment Objective and Policies;
             Registrant..............    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    Cover Page; Merrill Lynch Select
             Securities..............    Pricing(SM) System; Additional
                                         Information
  Item  7.   Purchase of Securities     Cover Page; Fee Table; Merrill Lynch
             Being Offered...........    Select Pricing(SM) System; Purchase of
                                         Shares; Shareholder Services;
                                         Additional Information; Inside Back
                                         Cover Page
  Item  8.   Redemption or              Fee Table; Merrill Lynch Select
             Repurchase..............    Pricing(SM) System; Purchase of Shares;
                                         Redemption of Shares
  Item  9.   Pending Legal              Not Applicable
             Proceedings.............
 
PART B
  Item 10.   Cover Page..............   Cover Page
  Item 11.   Table of Contents.......   Back Cover Page
  Item 12.   General Information and    Additional Information
             History.................
  Item 13.   Investment Objective and   Investment Objective and Policies
             Policies................
  Item 14.   Management of the Fund..   Management of the Trust
  Item 15.   Control Persons and
              Principal Holders of      Management of the Trust; General
              Securities.............    Information--Additional Information
  Item 16.   Investment Advisory and    Management of the Trust; Purchase of
             Other Services..........    Shares; General Information
  Item 17.   Brokerage Allocation and   Portfolio Transactions
             Other Practices.........
  Item 18.   Capital Stock and Other    General Information--Description of
             Securities..............    Shares
  Item 19.   Purchase, Redemption and
              Pricing of Securities     Purchase of Shares; Redemption of
              Being Offered..........   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
   
NOVEMBER 14, 1997     
 
                    MERRILL LYNCH OHIO 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 Ohio Municipal Bond Fund (the "Fund") is a mutual fund that
seeks to provide shareholders with as high a level of income exempt from
Federal and Ohio income taxes as is consistent with prudent investment
management. With respect to Ohio taxes, such income is expected to be exempt
only from Ohio personal and estate income taxes. The Fund invests primarily in
a portfolio of long-term, investment grade obligations issued by or on behalf
of the State of Ohio, its political subdivisions, agencies and
instrumentalities and of other qualifying issuers, such as issuers located in
Puerto Rico, the U.S. Virgin Islands and Guam, the interest on which, in the
opinion of bond counsel to the issuer, is exempt from Federal income tax and
Ohio personal and estate income taxes ("Ohio Municipal Bonds"). Dividends paid
by the Fund are exempt from Federal income tax and Ohio personal and estate
income taxes to the extent they are derived from Ohio 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, see "Investment
Objective and Policies" on page 10.     
 
                               ----------------
  Pursuant to the Merrill Lynch Select PricingSM 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 PricingSM 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 PricingSM 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], or from securities dealers which have entered into 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 except that for participants in
certain fee-based programs the minimum initial purchase is $500 and the
minimum subsequent purchase is $50. Merrill Lynch may charge its customers a
processing fee (presently $5.35) for confirming purchases and repurchases.
Purchases and redemptions made directly through Merrill Lynch Financial Data
Services, Inc. (the "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 NOR  HAS  THE   COMMISSION  PASSED UPON  THE
       ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRE- SENTATION 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 November 14, 1997 (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-
referenced telephone number or address. The Commission maintains a Web site
(http://www.sec.gov) that contains the Statement of Additional Information,
material incorporated by reference and other information regarding the Fund.
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 percent-
  age of offer-
  ing 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 pur-
  chase price or
  redemption
  proceeds,
  whichever is                 4.0% during the first
  lower)........     None(d)           year,           1.0% for one year(f)   None(d)
                              decreasing 1.0% annually
                              thereafter to 0.0% after
                                        the
                                   fourth year(e)
 Exchange Fee...     None               None                   None           None
ANNUAL FUND OP-
 ERATING EX-
 PENSES (AS A
 PERCENTAGE OF
 AVERAGE NET AS-
 SETS):
 Investment Ad-
  visory
  Fees(g).......    0.55%               0.55%                  0.55%         0.55%
 Rule 12b-1
  Fees(h):
 Account Mainte-
  nance 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,
                               cease being subject to
                               distribution fees and
                                       become
                              subject to lower account
                                 maintenance fees)
 Other Expenses:
 Custodial
  Fees..........    0.01%              0.01%                          0.01%  0.01%
 Shareholder
  Servicing
  Costs(i)......    0.04%              0.05%                          0.05%  0.04%
 Miscellaneous..    0.20%                        0.20%                0.20%  0.20%
                    -----                        -----                -----  -----
  Total Other
   Expenses.....    0.25%                        0.26%                0.26%  0.25%
                    -----                        -----                -----  -----
 Total Fund Op-
  erating Ex-
  penses........    0.80%                        1.31%                1.41%  0.90%
                    =====                        =====                =====  =====
</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 25.     
   
(c) Reduced for purchases of $25,000 and over and waived for purchases of
    Class A shares by participants in connection with certain fee-based
    programs. Class A and 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 that
    are not subject to an initial sales charge may instead be subject to a
    CDSC of 1.0% if redeemed within the first year after purchase. Such CDSC
    may be waived in connection with certain fee-based programs. See
    "Shareholder Services--Fee-Based Programs"--page 35.     
                                             (Footnotes continued on next page)
 
                                       2
<PAGE>
 
   
(e) The CDSC may be modified in connection with certain fee-based programs.
    See "Shareholder Services--Fee-Based Programs"--page 35.     
   
(f) The CDSC may be waived in connection with certain fee-based programs. See
    "Shareholder Services--Fee-Based Programs"--page 35.     
(g) See "Management of the Trust--Management and Advisory Arrangements"--page
    20.
   
(h) See "Purchase of Shares--Distribution Plans"--page 29.     
(i) See "Management of the Trust--Transfer Agency Services"--page 21.
 
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
 (including any applicable
 CDSC for Class B and Class
 C shares):
  Class A..................  $       48    $       65   $       83   $       135
  Class B..................  $       53    $       62   $       72   $       158
  Class C..................  $       24    $       45   $       77   $       169
  Class D..................  $       49    $       68   $       88   $       146
An investor would pay the
 following expenses on the
 same $1,000 investment
 assuming no redemption at
 the end of the period:
  Class A..................  $       48    $       65   $       83   $       135
  Class B..................  $       13    $       42   $       72   $       158
  Class C..................  $       14    $       45   $       77   $       169
  Class D..................  $       49    $       68   $       88   $       146
</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 RATE 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. (the
"NASD"). Merrill Lynch may charge its customers a processing fee (presently
$5.35) for confirming purchases and repurchases. Purchases and redemptions
made 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 Pricing(SM) System is used
by more than 50 registered investment companies advised by Merrill Lynch Asset
Management, L.P. ("MLAM") or its affiliate, Fund Asset Management, L.P. ("FAM"
or the "Manager"). Funds advised by MLAM or FAM that use the Merrill Lynch
Select Pricing(SM) 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 CDSCs, 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 CDSCs and distribution fees with respect to the Class B and Class
C shares in that the sales charges and distribution fees 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 Pricing(SM) 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 Pricing(SM) 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 "Purchase of
Shares."     
 
                                       4
<PAGE>
 
 
<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 four 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 by participants 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 CDSC of
    1.0% if redeemed within one year. Such CDSC may be waived in connection
    with certain fee-based programs. See "Class A" and "Class D" below.     
   
(4) The CDSC may be modified in connection with certain fee-based programs.
           
(5) The conversion period for dividend reinvestment shares and certain fee-
    based programs was 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 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 of 4.00% is reduced for purchases of $25,000 and
         over and waived for purchases by participants 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 certain fee-based programs. Sales charges
         also are reduced under a right of accumulation that takes into
         account the investor's holdings of all classes of all MLAM-advised
             
                                       5
<PAGE>
 
         
      mutual funds. See "Purchase of Shares--Initial Sales Charge
      Alternatives--Class A and Class D Shares."     
   
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%,
         an ongoing distribution fee of 0.25% of the Fund's average net assets
         attributable to Class B shares, as well as a CDSC if they are redeemed
         within four years of purchase. Such CDSC may be modified in connection
         with 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 after purchase.
         Such CDSC may be waived in connection with 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 shares), Class C shares have no
         conversion feature and, accordingly, an investor who 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. The maximum initial sales charge of 4.00% is
         reduced for purchases of $25,000 and over. 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 certain fee-based programs. The
         schedule of initial sales charges and reductions for the Class D
         shares is the same as the schedule for Class A shares, except that
         there is no waiver for purchases 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" above. 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
Pricing(SM) System that the investor believes is most beneficial under his
particular circumstances.
   
  Initial Sales Charge Alternatives. Investors who 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 that 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 connection
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, 1997 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
                                                              FEBRUARY 28,
                        FOR THE YEAR ENDED JULY 31,            1992+  TO
                    ----------------------------------------    JULY 31,
                     1997    1996     1995     1994    1993       1992
                    ------  -------  -------  ------  ------  ------------
 <S>                <C>     <C>      <C>      <C>     <C>     <C>
 Increase
  (Decrease) in
  Net Asset
  Value:
 PER SHARE
  OPERATING
  PERFORMANCE:
 Net asset value,
  beginning of
  period.........   $10.70  $ 10.56  $ 10.50  $11.02  $10.56     $10.00
                    ------  -------  -------  ------  ------     ------
 Investment
  income--net....      .55      .54      .55     .56     .58        .25
 Realized and
  unrealized gain
  (loss) on
  investments--
  net............      .47      .14      .06    (.43)    .49        .56
                    ------  -------  -------  ------  ------     ------
 Total from
  investment
  operations.....     1.02      .68      .61     .13    1.07        .81
                    ------  -------  -------  ------  ------     ------
 Less dividends
  and
  distributions:
 Investment
  income--net....     (.55)    (.54)    (.55)   (.56)   (.58)      (.25)
 Realized gain on
  investments--
  net............      --       --       --      --     (.03)       --
 In excess of
  realized gain
  on
  investments--
  net............      --       --       --     (.09)    --         --
                    ------  -------  -------  ------  ------     ------
 Total dividends
  and
  distributions..     (.55)    (.54)    (.55)   (.65)   (.61)      (.25)
                    ------  -------  -------  ------  ------     ------
 Net asset value,
  end of period..   $11.17  $ 10.70  $ 10.56  $10.50  $11.02     $10.56
                    ======  =======  =======  ======  ======     ======
 TOTAL INVESTMENT
  RETURN**:
 Based on net
  asset value per
  share..........    9.80%    6.56%    6.03%   1.10%  10.51%      8.21%#
                    ======  =======  =======  ======  ======     ======
 RATIOS TO
  AVERAGE NET
  ASSETS:
 Expenses, net of
  reimbursement..     .80%     .87%     .86%    .65%    .51%       .16%*
                    ======  =======  =======  ======  ======     ======
 Expenses........     .80%     .87%     .89%    .89%   1.04%      1.36%*
                    ======  =======  =======  ======  ======     ======
 Investment
  income--net....    5.07%    5.03%    5.30%   5.12%   5.44%      5.75%*
                    ======  =======  =======  ======  ======     ======
 SUPPLEMENTAL
  DATA:
 Net assets, end
  of period (in
  thousands).....   $8,506  $ 7,281  $ 7,270  $9,373  $8,446     $4,209
                    ======  =======  =======  ======  ======     ======
 Portfolio
  Turnover.......   52.57%  118.21%  169.34%  44.83%  41.51%     13.21%
                    ======  =======  =======  ======  ======     ======
<CAPTION>
                                          CLASS B
                    ---------------------------------------------------------
                                                                   FOR THE
                                                                    PERIOD
                                 FOR THE YEAR                    FEBRUARY 28,
                                ENDED JULY 31,                    1992+  TO
                    --------------------------------------------   JULY 31,
                     1997     1996     1995     1994     1993        1992
                    -------- -------- -------- -------- -------- ------------
 <S>                <C>      <C>      <C>      <C>      <C>      <C>
 Increase
  (Decrease) in
  Net Asset
  Value:
 PER SHARE
  OPERATING
  PERFORMANCE:
 Net asset value,
  beginning of
  period.........   $ 10.70  $ 10.56  $ 10.50  $ 11.02  $ 10.56    $ 10.00
                    -------- -------- -------- -------- -------- ------------
 Investment
  income--net....       .49      .49      .49      .50      .52        .23
 Realized and
  unrealized gain
  (loss) on
  investments--
  net............       .47      .14      .06     (.43)     .49        .56
                    -------- -------- -------- -------- -------- ------------
 Total from
  investment
  operations.....       .96      .63      .55      .07     1.01        .79
                    -------- -------- -------- -------- -------- ------------
 Less dividends
  and
  distributions:
 Investment
  income--net....      (.49)    (.49)    (.49)    (.50)    (.52)      (.23)
 Realized gain on
  investments--
  net............       --       --       --       --      (.03)       --
 In excess of
  realized gain
  on
  investments--
  net............       --       --       --      (.09)     --         --
                    -------- -------- -------- -------- -------- ------------
 Total dividends
  and
  distributions..     (.49)     (.49)    (.49)    (.59)    (.55)      (.23)
                    -------- -------- -------- -------- -------- ------------
 Net asset value,
  end of period..   $ 11.17  $ 10.70  $ 10.56  $ 10.50  $ 11.02    $ 10.56
                    ======== ======== ======== ======== ======== ============
 TOTAL INVESTMENT
  RETURN**:
 Based on net
  asset value per
  share..........     9.25%    6.01%    5.49%     .59%    9.95%      7.98%#
                    ======== ======== ======== ======== ======== ============
 RATIOS TO
  AVERAGE NET
  ASSETS:
 Expenses, net of
  reimbursement..     1.31%    1.38%    1.37%    1.16%    1.02%       .67%*
                    ======== ======== ======== ======== ======== ============
 Expenses........     1.31%    1.38%    1.40%    1.39%    1.55%      1.86%*
                    ======== ======== ======== ======== ======== ============
 Investment
  income--net....     4.56%    4.52%    4.79%    4.61%    4.93%      5.26%*
                    ======== ======== ======== ======== ======== ============
 SUPPLEMENTAL
  DATA:
 Net assets, end
  of period (in
  thousands).....   $60,072  $64,397  $64,068  $65,610  $53,341    $26,244
                    ======== ======== ======== ======== ======== ============
 Portfolio
  Turnover.......    52.57%  118.21%  169.34%   44.83%   41.51%     13.21%
                    ======== ======== ======== ======== ======== ============
</TABLE>    
- --------
 * Annualized.
** Total investment returns exclude the effects of sales loads.
 + Commencement of operations.
# Aggregate total investment return.
 
                                       8
<PAGE>
 
 
 
 
<TABLE>   
<CAPTION>
                                     CLASS C                      CLASS D
                            ---------------------------- ----------------------------
                                               FOR THE                      FOR THE
                                               PERIOD                       PERIOD
                             FOR THE YEAR    OCTOBER 21,  FOR THE YEAR    OCTOBER 21,
                            ENDED JULY 31,    1994+ TO   ENDED JULY 31,    1994+ TO
                            ---------------   JULY 31,   ---------------   JULY 31,
                             1997    1996       1995      1997    1996       1995
                            ------  -------  ----------- ------  -------  -----------
 <S>                        <C>     <C>      <C>         <C>     <C>      <C>
 Increase (Decrease) in
  Net Asset Value:
 PER SHARE OPERATING
  PERFORMANCE:
 Net asset value,
  beginning of period....   $10.70  $ 10.56    $ 10.09   $10.70  $ 10.56    $ 10.09
                            ------  -------    -------   ------  -------    -------
 Investment income--net..      .48      .48        .37      .54      .53        .41
 Realized and unrealized
  gain on investments--
  net....................      .47      .14        .47      .46      .14        .47
                            ------  -------    -------   ------  -------    -------
 Total from investment
  operations.............      .95      .62        .84     1.00      .67        .88
                            ------  -------    -------   ------  -------    -------
 Less dividends from
  investment income--
  net....................     (.48)    (.48)      (.37)    (.54)    (.53)      (.41)
                            ------  -------    -------   ------  -------    -------
 Net asset value, end of
  period.................   $11.17  $ 10.70    $ 10.56   $11.16  $ 10.70    $ 10.56
                            ======  =======    =======   ======  =======    =======
 TOTAL INVESTMENT
  RETURN**:
 Based on net asset value
  per share..............     9.14%   5.90%      8.50%#    9.60%   6.45%      8.93%#
                            ======  =======    =======   ======  =======    =======
 RATIOS TO AVERAGE NET
  ASSETS:
 Expenses................     1.41%   1.49%      1.50%*     .90%    .97%       .99%*
                            ======  =======    =======   ======  =======    =======
 Investment income--net..     4.46%   4.42%      4.62%*    4.97%   4.93%      5.17%*
                            ======  =======    =======   ======  =======    =======
 SUPPLEMENTAL DATA:
 Net assets, end of
  period (in thousands)..   $2,412  $ 2,720    $   874   $4,310  $ 3,513    $ 3,234
                            ======  =======    =======   ======  =======    =======
 Portfolio Turnover......    52.57% 118.21%    169.34%    52.57% 118.21%    169.34%
                            ======  =======    =======   ======  =======    =======
</TABLE>    
- --------
 * Annualized.
** Total investment returns exclude the effects of sales loads.
 + Commencement of operations.
# 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 Ohio income taxes as is consistent
with prudent investment management. With respect to Ohio taxes, such income is
expected to be exempt only from Ohio personal and estate income taxes. The Fund
seeks to achieve its objective while providing investors with the opportunity
to invest in a portfolio of securities consisting primarily of long-term
obligations issued by or on behalf of the State of Ohio, its political
subdivisions, agencies and instrumentalities and obligations of other
qualifying issuers, such as issuers located in Puerto Rico, the U.S. Virgin
Islands and Guam, which pay interest exempt, in the opinion of bond counsel to
the issuer, from Federal income tax and Ohio personal and estate income taxes.
Obligations exempt from Federal income taxes are referred to herein as
"Municipal Bonds" and obligations exempt from both Federal income tax and Ohio
personal and estate income taxes are referred to as "Ohio Municipal Bonds."
Unless otherwise indicated, references to Municipal Bonds shall be deemed to
include Ohio Municipal Bonds. The Fund at all times, except during temporary
defensive periods, will maintain at least 65% of its total assets invested in
Ohio 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.     
   
  Municipal Bonds may include several types of bonds. The Fund may also invest
in variable rate demand obligations ("VRDOs"). The interest on Municipal Bonds
may bear a fixed rate or be payable 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 Services ("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, 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 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     
 
                                       10
<PAGE>
 
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 income tax and Ohio personal and estate income taxes. However, to
the extent that suitable Ohio 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 Ohio, 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 also
include securities issued by other investment companies that invest in
municipal 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 instruments
evidencing interests in one or more long-term municipal securities.     
 
 
                                       11
<PAGE>
 
   
  Under normal circumstances, except when acceptable securities are unavailable
as determined by the Manager, the Fund will invest at least 65% of its total
assets in Ohio Municipal Bonds. 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 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 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 income tax and
Ohio personal and estate income taxes by investing in a professionally managed
portfolio consisting primarily of long-term Ohio 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 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.     
 
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 investment. Certain instruments in which the Fund may invest may be
characterized as derivative securities. See "Description of Municipal Bonds"
and "Financial Futures Transactions and Options."     
   
  Moreover, the Fund ordinarily will invest at least 65% of its total assets in
Ohio Municipal Bonds, and therefore it is more susceptible to factors and
conditions adversely affecting issuers of Ohio Municipal Bonds than is a
municipal bond mutual fund that is not concentrated in issuers of Ohio
Municipal Bonds to this degree. The Ohio State General Revenue Fund (the "GRF")
had positive fund and cash balances at the end     
 
                                       12
<PAGE>
 
   
of the 1997 Fiscal Year of $834.9 million and $1,400 million, respectively, and
as of the end of August 1997, the GRF had a positive cash balance of $2.796
million. Economic activity in the State, as in many other industrially
developed states, tends to be more cyclical than in some other states and in
the nation as a whole. Currently, the State of Ohio's general obligation bonds
are rated AA+, Aa1 and AA+ by Fitch, Moody's and Standard & Poor's,
respectively.     
   
  The value of Municipal Bonds generally may be affected by uncertainties in
the municipal markets as a result of legislation or litigation changing the
taxation of Municipal Bonds or the rights of Municipal Bond holders in the
event of a bankruptcy. Municipal bankruptcies are rare, and certain provisions
of the U.S. Bankruptcy Code governing such bankruptcies are unclear. Further,
the application of state law to Municipal Bond issuers could produce varying
results among the states or among Municipal Bond issuers with a state. These
uncertainties could have a significant impact on the prices of the Ohio
Municipal Bonds or Municipal Bonds in which the Fund invests.     
   
  The Manager does not believe that the current economic conditions in Ohio (or
other factors described above) will have a significant adverse effect on the
Fund's ability to invest in high quality Ohio Municipal Bonds. Because the
Fund's portfolio will be comprised primarily of investment grade securities,
the Fund is expected to be less subject to market and credit risks than a fund
that invests primarily in lower quality Ohio Municipal Bonds. See "Description
of Municipal Bonds" in the Statement of Additional Information and see also
Appendix I--"Economic and Financial Conditions in Ohio" 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), refunding of outstanding
obligations and obtaining funds for general operating expenses and loans to
other public institutions and facilities. In addition, certain types of
industrial development bonds ("IDBs") are issued by or on behalf of public
authorities to finance various privately operated facilities, including certain
facilities for local furnishing of electric energy or gas, sewage facilities,
solid waste disposal facilities and 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 Ohio Municipal Bonds if the interest thereon is exempt
from both Federal income tax and Ohio personal and estate income taxes, even
though such bonds may be "private activity bonds" as discussed below.     
   
  The two principal classifications of Municipal Bonds are "general obligation"
bonds and "revenue" bonds which latter category includes IDBs and, for bonds
issued after August 15, 1986, private activity bonds. General obligation bonds
are secured by the issuer's pledge of its faith, credit and taxing power for
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, and an entity's creditworthiness will depend on many factors, including
potential erosion of the tax base due to population declines, natural
disasters, declines in the state's industrial base or inability to attract new
industries, economic limits on the ability to tax without eroding the tax base,
state legislative proposals or voter initiatives to limit ad valorem real
property taxes, and the extent to which the entity relies on Federal or state
aid, access to capital markets or other factors beyond the state's     
 
                                       13
<PAGE>
 
or entity's control. Accordingly, the capacity of the issuer of a general
obligation bond as to the timely payment of interest and the repayment of
principal when due is affected by the issuer's maintenance of its tax base.
   
  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 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 the
revenue or special obligation bond is a function of the economic viability of
such facility or such revenue source.     
   
  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, to a private entity for the purpose of financing
construction or improvement of a facility to be used by the 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 a
parent 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 the revenues of a private entity and 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, capital
structure, demand for its products or services, competition, general economic
conditions, government regulation and the entity's dependence on revenues for
the operation of the particular facility being financed. The Fund may invest
more than 25% of its total assets in IDBs and private activity bonds. The Fund
may also invest in so-called "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, 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 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 Municipal
Bonds must 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
 
                                       14
<PAGE>
 
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 issued by government authorities or entities to
finance the acquisition or construction of equipment, land and/or facilities.
The certificates represent participations in a lease, an installment purchase
contract or a conditional sales contract (hereinafter collectively called
"lease obligations") relating to such equipment, land or 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 foreclosure 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 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 to be 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 the obligations rated below investment grade, the Manager must,
among other things, also review the creditworthiness of the entity 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
obligation and the willingness of dealers to make a market in the obligation.
    
  The value of bonds and other fixed-income obligations may fall when interest
rates rise and rise when interest rates fall. In general, bonds and other
fixed-income obligations with longer maturities will be subject to greater
volatility resulting from interest rate fluctuations than will similar
obligations with shorter maturities. Under normal conditions, it is generally
anticipated that the Fund's average weighted maturity would be in excess of ten
years.
 
  Federal tax legislation has limited the types and volume of bonds the
interest on which qualifies for a Federal income tax exemption. 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.
 
                                       15
<PAGE>
 
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.
 
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.
 
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. 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 index-
based futures contracts 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
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. Recent legislation has created new
categories of capital gains taxable at different rates, which the Fund may be
able to pass through to shareholders. 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
 
                                       16
<PAGE>
 
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, 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 purchase and
sell futures contracts and options thereon (i) only 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.) Manager 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.
 
                                       17
<PAGE>
 
   
  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, which requirement will no longer apply to the Fund after its
fiscal year ending July 31, 1998. 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 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, 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.
 
                                       18
<PAGE>
 
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 for the special tax
treatment afforded regulated investment companies under 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 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.
 
                                       19
<PAGE>
 
  The Trustees are:
   
  Arthur Zeikel*--President of the Manager and its affiliate, MLAM; President
and Director of Princeton Services, Inc. ("Princeton Services"); and Executive
Vice President of ML & Co.     
 
  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 Investment Company Act of 1940, of the
  Trust.
 
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 140 registered investment companies. MLAM also
provides investment advisory services to individual and institutional accounts.
As of October 31, 1997, the Manager and MLAM had a total of approximately
$271.9 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.
   
  Theodore R. Jaeckel, Jr. is the Portfolio Manager of the Fund and has been
responsible for the day-to-day management of the Fund's investment portfolio
since September 1997. He has been a Director (Municipal Tax-Exempt Fund
Management) of MLAM since 1997 and was a Vice President thereof from 1991 to
1997.     
   
  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, 1997, the
total fee paid by the Fund to the Manager was $418,770 (based upon average net
assets of approximately $76.1 million).     
 
  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
 
                                       20
<PAGE>
 
   
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, 1997, the Fund reimbursed the Manager
$44,658 for accounting services. For the fiscal year ended July 31, 1997, the
ratio of total expenses to average net assets was .80% for Class A shares,
1.31% for Class B shares, 1.41% for Class C shares and .90% 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 that 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.
       
  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 that 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
   
  The Transfer Agent, which is a 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 Transfer Agent receives an annual fee of up to $11.00 per Class A or Class
D account and up to $14.00 per Class B or Class C account, and is entitled to
reimbursement for certain transaction charges and out-of-pocket expenses
incurred by the Transfer Agent under the Transfer Agency Agreement.
Additionally, a $.20 monthly closed account charge will be assessed on all
accounts which close during the calendar year. Application of this fee will
commence the month following the month the account is closed. At the end of the
calendar year, no further fees will be due. For purposes of the Transfer Agency
Agreement, the term "account" includes a shareholder account maintained
directly by the Transfer Agent and any other account representing the
beneficial interest of a person in a relevant share class on a recordkeeping
system, provided the recordkeeping system is maintained by a subsidiary of ML &
Co. For the fiscal year ended July 31, 1997, the Fund paid the Transfer Agent a
total fee of $38,242 pursuant to the Transfer Agency Agreement for providing
transfer agency services.     
 
 
                                       21
<PAGE>
 
                              PURCHASE OF SHARES
   
  The Distributor, an affiliate of each 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, except that for participants in certain fee-based
programs, the minimum initial purchase is $500 and the minimum subsequent
purchase is $50.     
   
  The Fund is offering 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 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 on that day, 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 $5.35) to
confirm a sale of shares to such customers. Purchases made directly through
the Fund's 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 CDSC and ongoing distribution fees
and higher account maintenance 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 CDSCs, 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
 
                                      22
<PAGE>
 
   
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 (except that Class B
shareholders may vote upon any material changes to expenses charged under the
Class D Distribution Plan). 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 CDSCs and distribution fees with respect to Class B and Class C shares
in that the sales charges and distribution fees 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, that are
eligible to sell shares.     
 
  The following table sets forth a summary of the distribution arrangements
for each class of shares under the Merrill Lynch Select Pricing(SM) System.
 
 
<TABLE>   
<CAPTION>
                                             ACCOUNT
                                           MAINTENANCE DISTRIBUTION
  CLASS          SALES CHARGE(/1/)             FEE         FEE        CONVERSION FEATURE
- ------------------------------------------------------------------------------------------
  <S>     <C>                              <C>         <C>          <C>
    A       Maximum 4.00% initial sales        No           No                No
                  charge(/2/)(/3/)
- ------------------------------------------------------------------------------------------
    B     CDSC for a period of four 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 by participants 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 certain fee-based programs.     
   
(4) The CDSC may be modified in connection with certain fee-based programs.
           
(5) The conversion period for dividend reinvestment shares and certain fee-
    based programs was 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 certain fee-based programs.     
 
                                      23
<PAGE>
 
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>    
- --------
 * 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 by participants 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 1.0% CDSC if the shares are redeemed within one year after
   purchase. Such CDSC may be waived in connection with 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 (the "Securities Act"). For the fiscal year ended July 31,
1997, the Fund sold 281,570 Class A shares for aggregate net proceeds of
$3,056,459. The gross sales charges for the sale of Class A shares of the Fund
for the year were $2,244, of which $216 and $2,028 were received by the
Distributor and Merrill Lynch, respectively. For the fiscal year ended July
31, 1997, 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, 1997, the Fund sold
48,281 Class D shares for aggregate net proceeds of $522,360. The gross sales
charge for the sale of Class D shares of the Fund for the year were $4,379, of
which $449 and $3,930 were received by the Distributor and Merrill Lynch,
respectively. For the fiscal year ended July 31, 1997, 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 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
 
                                      24
<PAGE>
 
   
that account. Class A shares are available at net asset value to corporate
warranty insurance reserve fund programs and U.S. branches of Foreign banking
institutions provided that the program or branch 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 TMA(SM) 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 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." Provided applicable threshold
requirements are met, either Class A or Class D shares are offered at net asset
value to Employee Access(SM) Accounts available through authorized employers.
Class A shares are offered at net asset value to shareholders of Merrill Lynch
Senior Floating Rate Fund, Inc. and, subject to certain conditions. 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 a 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
 
                                       25
<PAGE>
 
   
time of purchase. As discussed below, Class B shares are subject to a four-year
CDSC, which declines each year, 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."     
   
  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. The proceeds from the account
maintenance fees are used to compensate the Distributor and Merrill Lynch
(pursuant to a sub-agreement) for providing continuing account maintenance
activities. 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 that 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 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.     
 
                                       26
<PAGE>
 
  The following table sets forth the rates of the Class B CDSC:
 
<TABLE>
<CAPTION>
                                                                    CLASS B
                                                                   CDSC AS A
                                                                 PERCENTAGE OF
                                                                 DOLLAR AMOUNT
                                                                  SUBJECT TO
   YEAR SINCE PURCHASE PAYMENT MADE                                 CHARGE
   --------------------------------                              -------------
   <S>                                                           <C>
   0-1..........................................................     4.0%
   1-2..........................................................     3.0%
   2-3..........................................................     2.0%
   3-4..........................................................     1.0%
   4 and thereafter.............................................     None
</TABLE>
   
  For the fiscal year ended July 31, 1997, the Distributor received CDSCs of
$91,048 with respect to redemptions of Class B shares, all of which were paid
to Merrill Lynch. Additional CDSCs payable to the Distributor may have been
waived or converted to a contingent obligation in connection with a
shareholder's participation in certain fee-based programs.     
 
  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 Class B 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 has
acquired 10 additional shares upon dividend reinvestment. If at such time the
investor makes his first redemption of 50 shares (proceeds of $600), 10 shares
will not be subject to 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. The Class B CDSC also is
waived for any Class B shares that are purchased within qualifying Employee
Access(SM) Accounts. 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 that 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, 1997, the
Distributor received     
 
                                      27
<PAGE>
 
   
CDSCs of $518 with respect to redemptions of Class C shares, all of which were
paid to Merrill Lynch. The Class C CDSC may be waived in connection with
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.
 
  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 also may be modified for investors who participate in
certain fee-based programs. See "Shareholder Services--Fee-Based Programs."
    
                                       28
<PAGE>
 
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 provides
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 fees 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, 1997, the Fund paid the Distributor
$310,021 pursuant to the Class B Distribution Plan (based on average daily net
assets subject to such Class B Distribution Plan of approximately $62 million),
all of which were 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, 1997, the Fund paid the Distributor $15,210
pursuant to the Class C Distribution Plan (based on average daily net assets
subject to such Class C Distribution Plan of approximately $2.5 million), all
of which were 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, 1997, the Fund paid the Distributor $3,931
pursuant to the Class D Distribution Plan (based on average daily net assets
subject to such Class D Distribution Plan of approximately $3.9 million), all
of which were paid to Merrill Lynch for providing account maintenance
activities in connection with Class D shares.     
   
  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
    
                                       29
<PAGE>
 
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, 1996, 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 $1,111,000 (1.75% of Class B net assets at that date). As of July
31, 1997, direct cash revenues for the period since the commencement of
operations of Class B shares exceeded direct cash expenses by $686,270 (1.14%
of Class B net assets at that date). As of December 31, 1996, the fully
allocated accrual expenses incurred by the Distributor and Merrill Lynch for
the period since commencement of operations of Class C shares exceeded fully
allocated accrual revenues by approximately $8,000 (.29% of Class C net assets
at that date). As of July 31, 1997, direct cash revenues for the period since
the commencement of operations of Class C shares exceeded direct cash expenses
by $14,249 (.59% 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 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 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 fee, the
distribution fee 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
 
                                       30
<PAGE>
 
   
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 that 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 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 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 the 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     
 
                                       31
<PAGE>
 
   
minutes after the close of business on the NYSE, on the same day. Dealers have
the responsibility of submitting such repurchase requests to the Fund 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 that 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 $5.35) to confirm a repurchase of
shares to such customers. Repurchases made directly through the Fund's 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 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. Alternatively, the reinstatement privilege may be exercised through
the investor's Merrill Lynch Financial Consultant within thirty days after the
date the request for redemption was accepted by the Transfer Agent or
Distributor.     
 
                              SHAREHOLDER SERVICES
   
  The Trust offers a number of shareholder services and investment plans
described below that are 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.     
 
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 will receive separate transaction confirmations for each purchase
or sale transaction other than automatic investment purchases and the
reinvestments of ordinary income
 
                                       32
<PAGE>
 
   
dividends and long-term capital gains distributions. A shareholder may make
additions to his or her Investment Account at any time by mailing a check
directly to the Transfer Agent. Shareholders may also 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. 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 such shares and then must turn the
certificates over to the new firm for re-registration as described in the
preceding sentence.     
 
EXCHANGE PRIVILEGE
 
  U.S. shareholders of each class of shares of the Fund 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 the 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 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.
 
                                      33
<PAGE>
 
   
  Shares of the Fund that 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 of the exchanged
shares and a purchase of the acquired shares for Federal income 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 to Merrill Lynch if the shareholder's account is maintained with
Merrill Lynch or by written notification to Merrill Lynch, if the shareholder's
account is maintained with Merrill Lynch, or telephone (1-800-MER-FUND) to the
Transfer Agent if the shareholder's account is maintained with 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 or direct deposited monthly. The Fund is not responsible for any
failure of delivery to the shareholder's address of record and no interest will
accrue on amounts represented by uncashed distribution or redemption checks.
Cash payments can 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 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 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.     
 
                                       34
<PAGE>
 
   
With respect to redemptions of Class B or Class C shares pursuant to a
systematic withdrawal plan, the maximum number of Class B or Class C shares
that can be redeemed from an account annually shall not exceed 10% of the value
of shares of such class in that account at the time the election to join the
systematic withdrawal plan was made. Any CDSC that otherwise might be due on
such redemption of Class B or Class C shares will be waived. Shares redeemed
pursuant to a systematic withdrawal plan will be redeemed in the same order as
Class B or Class C shares are otherwise redeemed. See "Purchase of Shares--
Deferred Sales Charge Alternatives--Class B and Class C Shares--Contingent
Deferred Sales Charges--Class B Shares" and "--Contingent Deferred Sales
Charges--Class C Shares." Where the systematic withdrawal plan is applied to
Class B shares, upon conversion of the last Class B shares in an account to
Class D shares, the systematic withdrawal plan will automatically be applied
thereafter to Class D shares. See "Purchase of Shares--Deferred Sales Charge
Alternatives--Class B and Class C Shares--Conversion of Class B Shares to Class
D Shares."     
 
AUTOMATIC INVESTMENT PLANS
 
  Regular additions of Class A, Class B, Class C or 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 the Transfer Agent at
(800) MER-FUND or (800) 637-3863.     
 
 
                                       35
<PAGE>
 
                             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,
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 Fund may not purchase securities, including Municipal Bonds,
during the existence of any underwriting syndicate of which Merrill Lynch is a
member or in a private placement in which Merrill Lynch serves as placement
agent except pursuant to procedures approved by the Trustees of the Trust which
either comply with rules adopted by the Commission or with interpretations of
the Commission staff. Affiliated persons of the Trust may serve as its broker
in over-the-counter transactions conducted for the Fund on an agency basis
only.     
   
  Portfolio Turnover. 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 the Manager. As a result of the investment
policies of the Fund, the Fund's portfolio turnover may be higher than that of
other investment companies; however, it is extremely difficult to predict
portfolio turnover rates with any degree of accuracy. Higher portfolio turnover
may contribute to higher transactional costs and negative tax consequences,
such as an increase in capital gain dividends or in ordinary income dividends
of accrued market discount, as well as greater difficulty meeting the
requirement for qualification as a regulated investment company that less than
30% of its gross income be derived from the sale or other disposition of
securities held for less than three months which requirement will not apply to
the Fund after its fiscal year ending July 31, 1998. See "Distributions and
Taxes--Taxes." 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, 1996
and 1997 were 118.21% and 52.57%, respectively. The Fund's shift to a more
defensive posture necessitated a significant portfolio restructuring which led
to increased trading activity for the fiscal year ended July 31, 1996. High
portfolio turnover involves corresponding greater transaction costs in the form
of dealer spreads and brokerage commissions, which are borne directly by the
Fund. Such turnover also has certain tax consequences for the Fund. See
"Distributions and Taxes."     
 
                                       36
<PAGE>
 
                            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 the settlement date of a redemption order.     
   
  All net realized capital gains, if any, are declared and distributed to the
Fund's shareholders at least 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 to that class.
 
  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.
 
TAXES
   
  The Trust intends to continue to qualify the Fund for the special tax
treatment afforded regulated investment companies ("RICs") under the Code. As
long as 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 benefits and railroad retirement benefits
subject to Federal income taxes. The portion of such exempt-interest dividends
paid from interest received by the Fund from Ohio Municipal Bonds also will be
exempt from Ohio personal and estate income taxes. Shareholders subject to
income taxation by states other than Ohio will realize a lower after-tax rate
of return than Ohio 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 Ohio personal and estate income taxes.
Interest on indebtedness incurred or continued to purchase or carry Fund shares
is not deductible for Federal income     
 
                                       37
<PAGE>
 
   
tax or Ohio personal and estate income tax purposes to the extent attributable
to exempt-interest dividends. 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 advisors before purchasing Fund shares.     
   
  Distributions from investment income and capital gains of the Fund, including
exempt-interest dividends, may also be subject to state taxes in states other
than Ohio and may be subject to local taxes. Accordingly, investors in the Fund
should consult their tax advisors with respect to the application of such taxes
to the receipt of Fund dividends and to the holding of shares in the Fund.     
 
  Distributions treated as investment income or as capital gains for Federal
income tax purposes, including exempt-interest dividends, may be subject to
local taxes imposed by certain cities within Ohio. Additionally, the value of
shares of the Fund will be included in (i) the net worth measure of the issued
and outstanding shares of corporations and financial institutions for purposes
of computing the Ohio corporate franchise tax, (ii) the value of the gross
estate for purposes of the Ohio estate tax, (iii) the value of capital and
surplus for purposes of the Ohio domestic insurance company franchise tax and
(iv) the value of shares of and capital employed by dealers in intangibles for
purposes of the Ohio tax on dealers in intangibles. Investors should consult
their tax advisers with respect to the application of such taxes to the receipt
of Fund dividends, the holding of shares in the Fund and as to their Ohio tax
situation in general.
 
  Exempt-interest dividends paid to a corporate shareholder will be subject to
Ohio corporation excise tax, and shares of the Fund will be included in the net
worth base of such tax.
   
  To the extent that the Fund's distributions are derived from interest on its
taxable investments 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 income tax purposes. 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 the Ohio personal and estate income taxes unless they are attributable to
the sale of certain Ohio Municipal Bonds issued pursuant to legislation which
specifically exempts capital gains on their sale from Ohio income taxation.
Recent legislation creates additional categories of capital gains taxable at
different rates. Not later than 60 days after the close of its taxable year,
the Fund will provide its shareholders with a written notice designating the
amounts of any exempt-interest dividends, ordinary income dividends or capital
gain dividends, as well as the amount of capital gain dividends in the
different categories of capital gain referred to above. 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
 
                                       38
<PAGE>
 
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 to the extent of any
exempt-interest dividends received by the shareholder. 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 its 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.
    
  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.
 
  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 Code provisions, 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.
 
                                       39
<PAGE>
 
  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 Ohio 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 Ohio income tax laws. The Code and the Treasury regulations, as well
as the Ohio income 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 and local taxes and with specific
questions as to Federal, foreign, state or local taxes.     
 
                                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
 
                                       40
<PAGE>
 
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 and 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, 1997 was 4.35% for Class A shares, 4.03% for Class B shares, 3.93% for
Class C shares and 4.26% for Class D shares and the tax-equivalent yield for
the same period (based on a Federal income tax rate of 28%) was 6.04% for Class
A shares, 5.60% for Class B shares, 5.46% for Class C shares and 5.92% 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
once daily 15 minutes after the close of business on the NYSE (approximately
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
(including interest and dividends accrued but not yet received) minus all
liabilities (including accrued expenses) 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.     
 
                                       41
<PAGE>
 
  The per share net asset value of Class A shares will generally 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 the 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
D shares generally will be higher than the per share net asset value of the
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 a 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, 1987 the Trust again 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 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, $.10 par value per share, 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 relating to the account maintenance
associated with such shares, and Class B and Class C shares bear certain
expenses relating to the distribution of such shares. Each class has exclusive
voting rights with respect to matters relating to distribution and/or account
maintenance expenditures, as applicable. See "Purchase of Shares." The Trustees
of the Trust may classify and reclassify any Series into additional or other
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. 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, only Class B, Class C or Class D shares
of a Series will have exclusive voting rights with respect to matters relating
to the account maintenance and distribution expenses being borne solely by such
class (except that Class B shareholders may vote upon any material changes to
expenses charged under the Class D Distribution Plan). 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     
 
                                       42
<PAGE>
 
   
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. Upon liquidation or dissolution of a Series, each issued and
outstanding share of that Series is entitled to participate equally in
dividends and distributions declared by the respective Series and in net assets
of such Series 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
 
  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. No Trustee, shareholder, officer, employee or agent of the Trust
shall be held to any personal liability, nor shall resort be had to their
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 OHIO 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 Ohio 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
Address................................                                Name
........................................     Name and Address of Employer ......
                             (Zip Code)
Occupation.............................     ...................................
........................................     ...................................
........................................     ...................................
........................................     ...................................
........................................     ...................................
          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  [_] Reinvest                    SELECT  [_] Reinvest   
     ONE:    [_] Cash                        ONE:    [_] 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 Ohio 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 OHIO 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 "Distribution 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 Ohio 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 Ohio 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 Ohio 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:                                        Dealer Name and Address     
                                                                              
  Merrill Lynch Ohio Municipal Bond Fund    By: ...............................
                                              Authorized Signature of Dealer  
  c/o Merrill Lynch Financial Data                                            
    Services, Inc.                          
  P.O. Box 45289                            [_][_][_] [_][_][_][_] ............
  Jacksonville, Florida 32232-5289          Branch    F/C No.        F/C Last  
                                            Code                       Name    

                                            [_][_][_] [_][_][_][_][_]          
                                            Dealer's Customer A/C No.    
                                                                               
                                                                               
                                      46
<PAGE>
 
     MERRILL LYNCH OHIO 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
 
Name of Owner......................        [                                 ]
 
                                                  Social Security No. or
Name of Co-Owner (if any)..........           Taxpayer Identification Number
 
Address............................        Account Number ....................
                                           (if existing account)
....................................
- -------------------------------------------------------------------------------
   
2. SYSTEMATIC WITHDRAWAL PLAN (SEE TERMS AND CONDITIONS IN THE STATEMENT OF
ADDITIONAL INFORMATION)     
   
MINIMUM REQUIREMENTS: $10,000 for monthly disbursements, $5,000 for quarterly,
of [_] Class A, [_] Class B*, [_] Class C* or [_] Class D shares in Merrill
Lynch Ohio 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 THE AMOUNT OF THE WITHDRAWAL YOU WOULD LIKE PAID TO YOU (CHECK ONE):
[_] $      of [_] Class A, [_] Class B*, [_] Class C* 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.
   
*ANNUAL WITHDRAWAL CANNOT EXCEED 10% OF THE VALUE OF SHARES OF SUCH CLASS HELD
IN THE ACCOUNT AT THE TIME THE ELECTION TO JOIN THE SYSTEMATIC WITHDRAWAL PLAN
IS MADE.     
 
                                      47
<PAGE>
 
   MERRILL LYNCH OHIO 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 Ohio 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           DRAWN BY MERRILL LYNCH FINANCIAL
           SERVICES, INC.                         DATA SERVICES, INC.
 
 
You are hereby authorized to draw an     To...............................Bank
ACH debit each month on my bank                        (Investor's Bank)
account for investment in Merrill
Lynch Ohio Municipal Bond Fund, as
indicated below:
 
  Amount of each ACH debit $........     Bank Address.........................
                                      
                                       
  Account number ...................     City...... State...... Zip Code......
                                      
                                         As a convenience to me, I hereby
Please date and invest ACH debits on     request and authorize you to pay and
the 20th of each month beginning         charge to my account ACH debits
___________ or as soon thereafter        drawn on my account by and payable
   (Month)                               to Merrill Lynch Financial Data
as possible.                             Services, Inc. I agree that your
                                         rights in respect to each such debit
  I agree that you are drawing these     shall be the same as if it were a
ACH debits voluntarily at my request     check drawn on you and signed
and that you shall not be liable for     personally by me. This authority is
any loss arising from any delay in       to remain in effect until revoked
preparing or failure to prepare any      personally by me in writing. Until
such debit. If I change banks or         you receive such notice, you shall
desire to terminate or suspend this      be fully protected in honoring any
program, I agree to notify you           such debit. I further agree that if
promptly in writing. I hereby            any such debit be dishonored,
authorize you to take any action to      whether with or without cause and
correct erroneous ACH debits of my       whether intentionally or
bank account or purchases of fund        inadvertently, you shall be under no
shares including liquidating shares      liability.
of the Fund and crediting my bank    
account. I further agree that if a    
check or debit is not honored upon       ............   .....................
presentation, Merrill Lynch Financial        Date           Signature of     
Data Services, Inc. is authorized to                          Depositor      
discontinue immediately the Automatic                                        
Investment Plan and to liquidate         ............   .....................
sufficient shares held in my account         Bank      Signature of Depositor
to offset the purchase made with the       Account       (If joint account,  
dishonored debit.                           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]     
 
<PAGE>
 
                      
                   [This Page Intentionally Left Blank]     
 
<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 Pricing(SM) System....................................   4
Financial Highlights.......................................................   8
Investment Objective and Policies..........................................  10
 Potential Benefits........................................................  12
 Special and Risk Considerations Relating to Municipal Bonds...............  12
 Description of Municipal Bonds............................................  13
 Call Rights...............................................................  16
 When-Issued Securities and Delayed Delivery Transactions..................  16
 Financial Futures Transactions and Options................................  16
 Repurchase Agreements.....................................................  18
 Investment Restrictions...................................................  18
Management of the Trust....................................................  19
 Trustees..................................................................  19
 Management and Advisory Arrangements......................................  20
 Code of Ethics............................................................  21
 Transfer Agency Services..................................................  21
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............  25
 Distribution Plans........................................................  29
 Limitations on the Payment of Deferred Sales Charges......................  30
Redemption of Shares.......................................................  31
 Redemption................................................................  31
 Repurchase................................................................  31
 Reinstatement Privilege--Class A and
  Class D Shares...........................................................  32
Shareholder Services.......................................................  32
 Investment Account........................................................  32
 Exchange Privilege........................................................  33
 Automatic Reinvestment of Dividends and Capital Gains Distributions.......  34
 Systematic Withdrawal Plans...............................................  34
 Automatic Investment Plans................................................  35
 Fee-Based Programs........................................................  35
Portfolio Transactions.....................................................  36
Distributions and Taxes....................................................  37
 Distributions.............................................................  37
 Taxes.....................................................................  37
Performance Data...........................................................  40
Additional Information.....................................................  41
 Determination of Net Asset Value..........................................  41
 Organization of the Trust.................................................  42
 Shareholder Reports.......................................................  43
 Shareholder Inquiries.....................................................  43
Authorization Form.........................................................  45
</TABLE>    
                                                              
                                                           Code #16154-1197     

[LOGO] MERRILL LYNCH 

Merrill Lynch 
Ohio Municipal Bond Fund

[ART]

PROSPECTUS
    
November 14, 1997      

Distributor:
Merrill Lynch
Funds Distributor, Inc.

This prospectus should be retained for future reference.
<PAGE>
 
STATEMENT OF ADDITIONAL INFORMATION
 
                     MERRILL LYNCH OHIO 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 Ohio 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 Ohio income taxes as is consistent with prudent
investment management. With respect to Ohio taxes, such income is expected to
be exempt only from Ohio personal and estate income taxes. The Fund invests
primarily in a portfolio of long-term investment grade obligations issued by or
on behalf of the State of Ohio, its political subdivisions, agencies and
instrumentalities and obligations of other qualifying issuers, such as issuers
located in Puerto Rico, the U.S. Virgin Islands and Guam, which pay interest
exempt, in the opinion of bond counsel to the issuer, from Federal income tax
and Ohio personal and estate income taxes ("Ohio Municipal Bonds"). There can
be no assurance that the investment objective of the Fund will be realized.
    
  Pursuant to the Merrill Lynch Select PricingSM 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 PricingSM 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 November
14, 1997 (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 November 14, 1997.     
<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 Ohio income taxes as is consistent
with prudent investment management. With respect to Ohio taxes, such income is
expected to be exempt only from Ohio personal and estate income taxes. The Fund
seeks to achieve its objective by investing primarily in a portfolio of long-
term obligations issued by or on behalf of Ohio, its political subdivisions,
agencies and instrumentalities and obligations of other qualifying issuers,
such as issuers located in Puerto Rico, the U.S. Virgin Islands and Guam, which
pay interest exempt, in the opinion of bond counsel to the issuer, from Federal
income tax and Ohio personal and estate income taxes. Obligations exempt from
Federal income taxes are referred to herein as "Municipal Bonds" and
obligations exempt from both Federal income tax and Ohio personal and estate
income taxes are referred to as "Ohio Municipal Bonds." Unless otherwise
indicated, references to Municipal Bonds shall be deemed to include Ohio
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 Ohio 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 (defined below) 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 ("IDBs") 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 Services ("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, LP. (the "Manager" or "FAM"), to other obligations in
which the Fund may invest.     
   
  The Fund ordinarily does not intend to realize investment income not exempt
from Federal income tax and Ohio personal and estate income taxes. However, to
the extent that suitable Ohio 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 to the issuer, from Federal, but not Ohio,
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 bonds, to the extent permitted by applicable law. Other Non-Municipal
Tax-Exempt Securities could include trust certificates or other derivative
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 Ohio Municipal Bonds. 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, together with
 
                                       2
<PAGE>
 
such other investments as are not exempt from Ohio taxation, 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 objectives
of the Fund set forth in this paragraph are fundamental policies 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
obligation 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 to changes, as an illustration, in market interest rates at a rate
which is a multiple (typically two) 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.
    
                                       3
<PAGE>
 
  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 or obligors 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 are highly leveraged. In addition,
the market for high yield municipal securities is relatively new and has not
weathered a major economic recession, and it is unknown what effects such a
recession might have on such securities. During periods 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
likely would 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
 
                                       4
<PAGE>
 
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 generally are 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 Municipal Bonds and Temporary Investments
which the Fund may invest. A more complete discussion concerning futures and
options transactions is set forth under "Investment Objective and Policies" in
the Prospectus. Information with respect to ratings assigned to tax-exempt
obligations which the Fund may purchase is set forth in Appendix II--"Ratings
of Municipal Bonds" in this Statement of Additional Information.
 
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,
refunding of outstanding obligations and obtaining funds for general operating
expenses and loans to other public institutions and facilities. In addition,
certain types of bonds are issued by or on behalf of public authorities to
finance various privately owned or operated facilities. Such obligations are
included within the term Municipal Bonds if the interest paid thereon is, in
the opinion of bond counsel to the issuer, excluded from gross income for
Federal income tax purposes and, in the case of Ohio Municipal Bonds, exempt
from Ohio personal and estate income taxes. Other types of IDBs or private
activity bonds, the proceeds of which are used for the construction, equipment
or improvement of privately operated industrial or commercial facilities, may
also constitute Municipal Bonds, although the current Federal tax laws place
substantial limitations on the size of such issues.     
 
 
                                       5
<PAGE>
 
   
  The two principal classifications of Municipal Bonds are "general obligation"
bonds and "revenue" bonds which latter category includes IDBs and, for bonds
issued after August 15, 1986, private activity bonds. General obligation bonds
are secured by the issuer's pledge of its 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,
in the case of bonds issued after August 15, 1986, private activity bonds are
in most cases revenue bonds and generally do not constitute a pledge of the
credit or taxing power of the issuer of such bonds. Generally, the payment of
the principal and interest on such 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 line of credit, bond insurance or other security is
furnished. The Fund also 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 the bond
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 issued by government authorities or entities to
finance the acquisition or construction of equipment, land and/or facilities.
The certificates represent participations in a lease, an installment purchase
contract or a conditional sales contract (hereinafter collectively called
"lease obligations") relating to such equipment, land or 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. 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 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 to be 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 the latter, the Manager must,
among other things, also review the creditworthiness of the entity 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
obligation and the willingness of dealers to make a market in the obligation.
    
  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, the
general conditions of the Municipal Bond market, the maturity of the
obligation, and the rating of the issue. The ability of the Fund to achieve its
investment objective also is dependent on the continuing ability of the issuers
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 of such
Municipal Bonds may be
 
                                       6
<PAGE>
 
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 VRDOs at approximately the par value of the
VRDOs on the adjustment date. The adjustments typically are set at a 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.
 
                                       7
<PAGE>
 
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, Moody's or Fitch. 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 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. In the case of 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 in repurchase agreements maturing in more than seven days if such
investments, together with other illiquid securities, would exceed 15% of the
Fund's total assets.
 
                                       8
<PAGE>
 
  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 (or
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 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
"marking to 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
 
                                       9
<PAGE>
 
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 also is 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, U.S. Treasury notes, Government National Mortgage
Association 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 that 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.     
 
  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
 
                                       10
<PAGE>
 
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 sell
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.
 
  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
 
                                       11
<PAGE>
 
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.
 
  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.
 
                                       12
<PAGE>
 
  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 reflected fully in the value of the
option purchased.
 
  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, in the
  securities of issuers in any particular industry (excluding the U.S.
  Government and its agencies and instrumentalities).
 
    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
 
                                       13
<PAGE>
 
  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 applicable 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.
 
    7. Underwrite securities of other issuers except insofar as the Fund
  technically may be deemed an underwriter under 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 proposed non-fundamental investment restrictions, the Fund may not:
     
    a. Purchase securities of other investment companies, except to the
  extent that such purchases are permitted by applicable law. As a matter of
  policy, however, the Fund will not purchase shares of any registered open-
  end investment company or registered unit investment trust, in reliance on
  Section 12(d)(1)(F) or (G) (the "fund of funds" provisions) of the 1940
  Act, at any time the Fund's shares are owned by another investment company
  that is part of the same group of investment companies as the Fund.     
 
    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 to 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. 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.     
 
                                       14
<PAGE>
 
  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-
government 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.
 
                               ----------------
 
  Because of the affiliation of Merrill Lynch, Pierce, Fenner & Smith
Incorporated ("Merrill Lynch") with the Trust, the Trust is prohibited from
engaging in certain transactions involving Merrill Lynch except pursuant to a
permissive order or otherwise in compliance with the provisions of the 1940 Act
and the rules and regulations thereunder. Included among such restricted
transactions are purchases from or sales to Merrill Lynch of securities in
transactions in which it acts as principal and purchases of securities from
underwriting syndicates of which Merrill Lynch is a member.
 
                            MANAGEMENT OF THE TRUST
 
TRUSTEES AND OFFICERS
   
  Information about the Trustees and executive officers of the Trust and the
portfolio manager of the Fund, including their ages and their 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 (65)--President and Trustee(1)(2)--President of the Manager
(which term, as used herein, includes its corporate predecessors) since 1977;
President of MLAM (which term, as used herein, includes its 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.     
   
  James H. Bodurtha (53)--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 1980 to 1993.     
   
  Herbert I. London (58)--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; President, Hudson Institute since 1997
and Trustee since 1980; Dean, Gallatin Division of New York University from
1976 to 1993; Distinguished Fellow, Herman Kahn Chair, Hudson Institute from
1984 to 1985; Director, Damon Corporation from 1991 to 1995; Overseer, Center
for Naval Analyses from 1983 to 1993; Limited Partner, Hypertech LP in 1996.
    
                                       15
<PAGE>
 
   
  Robert R. Martin (70)--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 (68)--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 (45)--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 and TIBCO from 1994 to 1996.     
   
  Terry K. Glenn (57)--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 Merrill Lynch Funds
Distributor, Inc. ("MLFD" or the "Distributor") since 1986 and Director
thereof since 1991; President of Princeton Administrators, L.P. since 1988.
       
  Vincent R. Giordano (53)--Senior Vice President(1)(2)--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 (46)--Vice President(1)(2)--First Vice President of MLAM
since 1997; Vice President of MLAM from 1984 to 1997; Vice President of the
Manager since 1984.     
   
  Theodore R. Jaeckel, Jr. (38)--Portfolio Manager of the Fund(1)(2)--Director
(Municipal Tax-Exempt Fund Management) since 1997; Vice President of MLAM from
1991 to 1997.     
   
  Donald C. Burke (37)--Vice President(1)(2)--First Vice President of MLAM
since 1997; Vice President of MLAM from 1990 to 1997; Director of Taxation of
MLAM since 1990.     
   
  Gerald M. Richard (48)--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.     
   
  Robert E. Putney, III (37)--Secretary(1)(2)--Director (Legal Advisory) of
MLAM since 1997; Vice President of MLAM from 1994 to 1997; Attorney employed
by MLAM from 1991 to 1994; Attorney in private practice prior thereto.     
- --------
(1) Interested person, as defined in the 1940 Act, of the Trust.
   
(2) Such Trustee or officer is a director, trustee or officer of certain other
    investment companies for which the Manager or MLAM acts as investment
    adviser or manager.     
   
  At October 1, 1997, the Trustees and officers of the Trust as a group (13
persons) owned an aggregate of less than 1% of the outstanding shares of the
Fund. At such date, Mr. Zeikel, a Trustee and officer of the Trust, and the
other officers of the Trust owned an aggregate of less than 1% of the
outstanding shares of Common Stock of ML & Co.     
 
                                      16
<PAGE>
 
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
Committee and Nominating Committee (the "Committee"), which consists of all
the non-affiliated Trustees, an annual fee of $2,000 per year 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. 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, 1997, fees and expenses paid to the non-affiliated Trustees
that were allocated to the Fund aggregated $234.     
   
  The following table sets forth for the fiscal year ended July 31, 1997,
compensation paid by the Fund to the non-affiliated Trustees and for the
calendar year ended December 31, 1996, the aggregate compensation paid by all
registered investment companies (including the Trust) advised by the Manager
and its affiliate, MLAM ("FAM/MLAM Advised Funds") to the non-affiliated
Trustees:     
 
<TABLE>   
<CAPTION>
                                                                    AGGREGATE
                                                                   COMPENSATION
                                                    PENSION OR    FROM TRUST AND
                                                    RETIREMENT        OTHER
                                                     BENEFITS        FAM/MLAM
                                                    ACCRUED AS    ADVISED FUNDS
                                     COMPENSATION PART OF TRUST'S    PAID TO
NAME OF TRUSTEE                       FROM FUND      EXPENSES       TRUSTEE(1)
- ---------------                      ------------ --------------- --------------
<S>                                  <C>          <C>             <C>
James H. Bodurtha...................     $782          None          $148,500
Herbert I. London...................     $782          None          $148,500
Robert R. Martin....................     $782          None          $148,500
Joseph L. May.......................     $782          None          $148,500
Andre F. Perold.....................     $782          None          $148,500
</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).
       
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 affiliate purchases or sells
securities for the Fund or other funds for which they act as manager or for
their advisory clients and such sales or 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.
 
                                      17
<PAGE>
 
   
  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 year ended July 31,
1995, the total advisory fees payable by the Fund to the Manager aggregated
$402,455, of which the Manager voluntarily waived $19,871. For the fiscal year
ended July 31, 1996 and 1997, the total advisory fees paid by the Fund to the
Manager aggregated $431,325 and $418,770. No fees were waived for the fiscal
years ended July 31, 1996 and 1997.     
   
  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 compensation 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 a
portion of the Trust's general administrative expenses allocated on the basis
of the asset size of the respective series of the Trust ("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 that 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, 1995, 1996 and 1997, the
Fund reimbursed the Manager $32,847, $68,930 and $44,658, 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 shares will
be financed by the Fund pursuant to the Distribution Plan in compliance with
Rule 12b-1 under the 1940 Act. See "Purchase of Shares--Distribution Plan."
    
  The Manager is a limited partnership, the partners of which are ML & Co. and
Princeton Services. 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 policies.
 
  Duration and Termination. Unless earlier terminated as described herein, 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
 
                                       18
<PAGE>
 
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
Pricing(SM) 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
(except that Class B shareholders may vote upon any material changes to
expenses charged under the Class D Distribution Plan). Each class has
different exchange privileges. See "Shareholder Services--Exchange Privilege".
       
  The Merrill Lynch Select Pricing(SM) 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 that 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 subscription and 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 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, 1995 were $2,561, of which the Distributor received $310 and
Merrill Lynch received $2,251. The gross sales charges for the sale of Class A
shares for the fiscal year ended July 31, 1996 were $985, of which the
Distributor received $92 and Merrill Lynch received $893. The gross sales
charges for the sale of Class A shares for the fiscal year ended July 31, 1997
were $2,244, of which the Distributor received $216 and Merrill Lynch received
$2,028. 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 $737, of
which the Distributor received $112 and Merrill Lynch received $625. The gross
sales charges for the sale of Class D shares for the fiscal year ended July
31, 1996 were $1,557, of which the Distributor received $218 and Merrill Lynch
received $1,339. The gross sales charges for the sale of Class D shares for
the     
 
                                      19
<PAGE>
 
   
fiscal year ended July 31, 1997 were $4,379, of which the Distributor received
$449 and Merrill Lynch received $3,930. For the fiscal years ended July 31,
1995, 1996 and 1997, 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 years ended
July 31, 1996 and 1997, 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.     
   
  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 that 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 Investment Option. Class A shares of the Fund and 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 and wish to
reinvest the net proceeds from 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 Class A shares (if eligible
to buy 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
 
                                       20
<PAGE>
 
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
other MLAM-advised mutual funds made within a 13-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 transfer agent. The Letter of Intention
is not available to employee benefit plans for which Merrill Lynch provides
plan participant record-keeping 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 and 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 13-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 a purchase during the term of such Letter
would otherwise be subject to a further reduced sales charge based on the right
for accumulation, 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
 
                                       21
<PAGE>
 
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(SM) Accounts. Provided applicable threshold requirements are
met, either Class A or Class D shares are offered at net asset value to
Employee Access(SM) Accounts available through authorized employers. 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 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 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 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 such fund
was subject to a sales charge either at the time of purchase or on a deferred
basis. 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 such shares of
other mutual funds 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.
 
                                      22
<PAGE>
 
   
  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 that might result from an acquisition of assets having net unrealized
appreciation that 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 that (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, that 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 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.
 
  Payments of account maintenance fees 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 each 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 each 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.
 
                                       23
<PAGE>
 
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 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, 1997
with respect to the Class B and Class C shares of the Fund indicating the
maximum allowable payments that can be made under the 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, 1997
                          ------------------------------------------------------------------------------
                                                                                               ANNUAL
                                                                                            DISTRIBUTION
CLASS B SHARES, FOR THE             ALLOWABLE  ALLOWABLE              AMOUNTS                  FEE AT
 PERIOD FEBRUARY 28,      ELIGIBLE  AGGREGATE INTEREST ON MAXIMUM   PREVIOUSLY    AGGREGATE   CURRENT
 1992 (COMMENCEMENT OF      GROSS     SALES     UNPAID    AMOUNT      PAID TO      UNPAID    NET ASSET
 OPERATIONS) TO JULY 31,  SALES (1)  CHARGES  BALANCE (2) PAYABLE DISTRIBUTOR (3)  BALANCE   LEVEL (4)
 1997:                    --------- --------- ----------- ------- --------------- --------- ------------
                                                          (IN THOUSANDS)
<S>                       <C>       <C>       <C>         <C>     <C>             <C>       <C>
Under NASD Rule as
 Adopted................   $84,474   $5,280     $1,793    $7,073      $1,335       $5,738       $150
Under Distributor's
 Voluntary Waiver.......   $84,474   $5,280     $  422    $5,702      $1,335       $4,367       $150
CLASS C SHARES, FOR THE
 PERIOD OCTOBER 21, 1994
 (COMMENCEMENT OF
 OPERATIONS) TO JULY 31,
 1997:
Under NASD Rule as
 Adopted................   $ 3,598   $  225     $   29    $  254      $   18       $  236       $  8
</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. See
    "Purchase of Shares--Distribution Plans" in the Prospectus. This figure
    may include CDSCs that were deferred when a shareholder redeemed shares
    prior to the expiration of the applicable CDSC period and invested the
    proceeds, without the imposition of a sales charge, in Class A shares in
    conjunction with the shareholder's participation in the Merrill Lynch
    Mutual Fund Advisor (Merrill Lynch MFA(SM)) Program (the "MFA Program"). The
    CDSC is booked as a contingent obligation that may be payable if the
    shareholder terminates participation in the MFA Program.     
   
(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 (with respect to
    Class B shares) or the NASD maximum (with respect to Class B and Class C
    shares).     
 
                                      24
<PAGE>
 
                              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 for more than seven days 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.     
   
  The value of shares at the time of the redemption may be more or less than
the shareholder's cost, depending in part on the market value of the securities
held by the Fund at such time.     
 
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 in certain circumstances
including 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 Internal Revenue Code of
1986, as amended (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, 1995, 1996 and 1997, the
Distributor received CDSCs of $150,198, $136,374 and $91,048, respectively,
with respect to redemptions of Class B shares, all of which were paid to
Merrill Lynch. Additional CDSCs payable to the Distributor during the fiscal
year ended July 31, 1997, may have been waived or converted to a contingent
obligation in connection with a shareholder's participation in certain fee-
based programs. For the period October 21, 1994 (commencement of operations) to
July 31, 1995 and for the fiscal years ended July 31, 1996 and 1997, the
Distributor received CDSCs of $123, $863 and $518, respectively, 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--Other Investment
Policies and Practices" 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 ("OTC") 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     
 
                                       25
<PAGE>
 
   
fiscal year ended July 31, 1995, the Fund engaged in no transactions pursuant
to such order. For the fiscal year ended July 31, 1996, the Fund engaged in one
transaction pursuant to such order for an aggregate market value of $2,500,000.
For the fiscal year ended July 31, 1997, the Fund engaged in no transactions
pursuant to such order. An affiliated person of the Trust may serve as its
broker in transactions conducted by the Fund on an agency basis only. 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.     
   
  The Fund may not purchase securities, including Municipal Bonds, during the
existence of any underwriting syndicate of which Merrill Lynch is a member or
in a private placement in which Merrill Lynch serves as placement agent except
pursuant to procedures approved by the Trustees of the Trust which either
comply with rules adopted by the Commission or with interpretations of the
Commission staff. Rule 10f-3 under the 1940 Act sets forth conditions under
which the Fund may purchase municipal bonds from an underwriting syndicate of
which Merrill Lynch is a member. 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 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 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
einformation.     
 
  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 Rules of Fair Practice 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.
 
  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.
 
                                       26
<PAGE>
 
                        DETERMINATION OF NET ASSET VALUE
   
  Reference is made to "Additional Information--Determination of Net Asset
Value" in the Prospectus for information concerning the determination of net
asset value.     
   
  The net asset value of shares of all classes of the Fund is determined 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, Martin Luther
King, Jr. 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 (including interest and dividends accrued but not
yet received) minus all liabilities (including accrued expenses) 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 Class B and Class C 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 per share net asset
value of the four classes eventually 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 OTC municipal bond and money markets and are valued at
the last available bid price in the OTC 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.     
 
                                       27
<PAGE>
 
                              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 gain distributions. The statements will also
show any other activity in the account since the preceding statement.
Shareholders 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.
   
  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 so that the cash proceeds can be
transferred to the account at the new firm or 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. 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 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
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.
 
                                       28
<PAGE>
 
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 or direct deposited on or about the payment date.
   
  Shareholders may, at any time, notify Merrill Lynch in writing if their
account is maintained with Merrill Lynch or notify the Transfer Agent in
writing or by telephone (1-800-MER-FUND) if their account is maintained with
the Transfer Agent 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     
   
  A shareholder may elect to make systematic withdrawals from an Investment
Account of Class A, Class B, Class C or Class D shares on either a monthly or
quarterly basis as provided below. Quarterly withdrawals are available for
shareholders who have acquired 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 shares having a value of $10,000 or more.     
   
  At the time of each withdrawal payment, sufficient 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 the dollar amount and
class of shares to be redeemed. 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 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 shares in the Investment
Account are reinvested automatically in Fund shares. 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.     
   
  With respect to redemptions of Class B and Class C shares pursuant to a
systematic withdrawal plan, the maximum number of Class B or Class C shares
that can be redeemed from an account annually shall not exceed 10% of the value
of shares of such Class in that account at the time the election to join the
systematic withdrawal plan was made. Any CDSC that otherwise might be due on
such redemption of Class B or Class C shares will be waived. Shares redeemed
pursuant to a systematic withdrawal plan will be redeemed in the same order as
Class B or Class C shares are otherwise redeemed. See "Purchase of Shares--
Deferred Sales Charge Alternatives--Class B and Class C Shares--Contingent
Deferred Sales Charges--Class B Shares" and "--Contingent Deferred Sales
Charges--Class C Shares" in the Prospectus. Where the systematic withdrawal
plan is applied to Class B shares, upon conversion of the last Class B shares
in an account to Class D shares, the systematic withdrawal plan will
automatically be applied thereafter to Class D shares. See "Purchase of
Shares--Deferred Sales Charge Alternatives--Class B and C Shares--Conversion of
Class     
 
                                       29
<PAGE>
 
   
B Shares to Class D Shares" in the Prospectus; if an investor wishes to change
the amount being withdrawn in a systematic withdrawal plan the investor should
contact his or her Financial Consultant.     
   
  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 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 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 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 $50. The proceeds of
systematic redemptions will be posted to the shareholder's account three
business days after the date the shares are redeemed. All redemptions are made
at net asset value. A shareholder may elect to have his or her shares redeemed
on the first, second, third or fourth Monday of each month, in the case of
monthly redemptions, or of every other month, in the case of bimonthly
redemptions. For quarterly, semiannual or annual redemptions, the shareholder
may select the month in which the shares are to be redeemed and may designate
whether the redemption is to be made on the first, second, third or fourth
Monday of the month. If the Monday selected is not a business day, the
redemption will be processed at net asset value on the next business day. The
CMA(R) or CBA(R) 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
   
  U.S. 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 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 exchange Class A shares for shares of a second MLAM-
advised mutual fund, but 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. 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 also are
exchangeable     
 
                                      30
<PAGE>
 
   
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 at least 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 and 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 and 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 with a reduced or 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 outstanding
Class B or Class C shares for Class B or Class C shares, respectively, of
another MLAM-advised mutual funds ("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 contingent deferred sales charge 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 deferred sales charge
schedule relating to the new Class B shares acquired through use of the
exchange privilege. 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 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 Special Value Fund Class B shares for
more than five years.     
 
                                       31
<PAGE>
 
   
  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 that 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 ("Institutional Fund") after having held the Class B shares
for two and a half years and three years later decide to redeem the shares of
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 Institutional Fund will be payable. If,
instead of such redemption the shareholder exchanged such shares for Class B
shares of a fund that the shareholder continues 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 MLAM-advised funds 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.     
 
                            DISTRIBUTIONS AND TAXES
   
  The Trust intends to continue to qualify the Fund for the special tax
treatment afforded regulated investment companies ("RICs") under the Code. As
long as 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 for each Series at the Series level rather than at the Trust level.
 
 
                                       32
<PAGE>
 
  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 its
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 that are attributable to
interest on tax-exempt obligations and are 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, including new categories of 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 that is 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 and Ohio personal and estate income tax
purposes. Exempt-interest dividends are included, however, in determining the
portion, if any, of a person's social security benefits and railroad retirement
benefits subject to Federal income taxes. Interest on indebtedness incurred or
continued to purchase or carry shares of a RIC, such as the Fund, will not be
deductible by the investor for Federal or Ohio income tax purposes to the
extent attributable to exempt-interest dividends. Shareholders are advised to
consult their tax advisors with respect to whether exempt-interest dividends
retain the exclusion under Code Section 103(a) if a 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.     
   
  The portion of the Fund's exempt-interest dividends paid from interest
received by the Fund from Ohio Municipal Bonds also will be exempt from Ohio
personal and estate income taxes. Shareholders subject to income taxation by
states other than Ohio will realize a lower after tax rate of return than Ohio
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 that constitutes exempt-interest dividends and the portion that
is exempt from Ohio personal and estate income taxes. The Fund will allocate
exempt-interest dividends among Class A, Class B, Class C and Class D
shareholders for Ohio personal and estate income tax purposes based on a method
similar to that described above for Federal income tax purposes.     
 
                                       33
<PAGE>
 
   
  Distributions from investment income and capital gains of the Fund, including
exempt-interest dividends, will be subject to Ohio corporation excise tax, and
may also be subject to tax in states other than Ohio and local taxes.     
 
  Distributions treated as investment income or as capital gains for Federal
income tax purposes, including exempt-interest dividends, may be subject to
local taxes imposed by certain cities within Ohio. Additionally, the value of
shares of the Fund will be included in (i) the net worth measure of the issued
and outstanding shares of corporations and financial institutions for purposes
of computing the Ohio corporate franchise tax, (ii) the value of the gross
estate for purposes of the Ohio estate tax, (iii) the value of capital and
surplus for purposes of the Ohio domestic insurance company franchise tax and
(iv) the value of shares of and capital employed by dealers in intangibles for
purposes of the Ohio tax on dealers in intangibles. Accordingly, investors in
the Fund, including, in particular, corporate investors which may be subject to
the Ohio corporate excise tax, should consult their tax advisors with respect
to the application of such taxes to an investment in the Fund, the receipt of
Fund dividends, the holding of shares in the Fund and as to their Ohio tax
situation in general.
   
  To the extent that the Fund's distributions are derived from interest on its
taxable investments 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 Ohio income tax purposes.
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. Recent legislation
creates additional categories of capital gains taxable at different rates. Not
later than 60 days after the close of its taxable year, the Fund will provide
its shareholders with a written notice designating the amounts of any exempt-
interest dividends, ordinary income dividends or capital gain dividends, as
well as the amount of capital gain dividends in the different categories of
capital gain referred to above. 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 to the extent of any exempt-interest dividends received by
the shareholder. 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
 
                                       34
<PAGE>
 
   
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.     
 
  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 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.
 
  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.
   
  Under certain Code provisions, 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     
 
                                       35
<PAGE>
 
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.
          
TAX TREATMENT OF OPTIONS 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 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 and 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 options or financial futures contract. Under recently
enacted legislation, this requirement will no longer apply to the Fund after
its fiscal year ending July 31, 1998.     
 
OHIO INCOME TAX
 
  Under present Ohio law, the Fund is not subject to any Ohio income taxation
or taxation measured by the capital assets of the Fund provided that the
appropriate annual report is timely filed with the Tax Commissioner of Ohio.
 
                               ----------------
 
  The foregoing is a general and abbreviated summary of the applicable
provisions of the Code, Treasury regulations and Ohio 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 Ohio income tax laws. The Code and the Treasury regulations, as well
as the Ohio tax laws, are subject to change by legislative, judicial or
administrative action either prospectively or retroactively.
 
                                       36
<PAGE>
 
   
  Shareholders are urged to consult their own tax advisors regarding the
availability of any exemptions from state or local taxes and with specific
questions as to Federal, foreign, state or local taxes.     
 
                                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, 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.
 
                                       37
<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              CLASS D SHARES
                  -------------------------- ---------------------------- -------------------------- ----------------------------
                                REDEEMABLE                   REDEEMABLE                 REDEEMABLE                   REDEEMABLE
                  EXPRESSED AS  VALUE OF A   EXPRESSED AS A  VALUE OF A   EXPRESSED AS  VALUE OF A   EXPRESSED AS A  VALUE OF A
                  A PERCENTAGE HYPOTHETICAL    PERCENTAGE   HYPOTHETICAL  A PERCENTAGE HYPOTHETICAL    PERCENTAGE   HYPOTHETICAL
                   BASED ON A     $1,000       BASED ON A      $1,000      BASED ON A     $1,000       BASED ON A      $1,000
                  HYPOTHETICAL  INVESTMENT    HYPOTHETICAL   INVESTMENT   HYPOTHETICAL  INVESTMENT    HYPOTHETICAL   INVESTMENT
                     $1,000    AT THE END OF     $1,000     AT THE END OF    $1,000    AT THE END OF     $1,000     AT THE END OF
                   INVESTMENT   THE PERIOD     INVESTMENT    THE PERIOD    INVESTMENT   THE PERIOD     INVESTMENT    THE PERIOD
                  ------------ ------------- -------------- ------------- ------------ ------------- -------------- -------------
                                                                    AVERAGE ANNUAL TOTAL RETURN
                                                            (INCLUDING MAXIMUM APPLICABLE SALES CHARGE)
<S>               <C>          <C>           <C>            <C>           <C>          <C>           <C>            <C>
One year ended
July 31, 1997...      5.41%      $1,054.10        5.25%       $1,052.50       8.14%      $1,081.40        5.21%       $1,052.10
Five years ended
July 31, 1997...      5.88%      $1,330.60        6.21%       $1,351.30
Inception
(February 28,
1992) to July
31, 1997........      6.95%      $1,439.80        7.22%       $1,459.10
Inception
(October 21,
1994) to July
31, 1997........                                                              8.50%      $1,254.00        7.43%       $1,220.00
<CAPTION>
                                                                        ANNUAL TOTAL RETURN
                                                            (EXCLUDING MAXIMUM APPLICABLE SALES CHARGE)
<S>               <C>          <C>           <C>            <C>           <C>          <C>           <C>            <C>
Year ended July
31, 1997........      9.80%      $1,098.00        9.25%       $1,092.50       9.14%      $1,091.40        9.60%       $1,096.00
Year ended July
31, 1996........      6.56%      $1,065.60        6.01%       $1,060.10       5.90%      $1,059.00        6.45%       $1,064.50
Year ended July
31, 1995........      6.03%      $1,060.30        5.49%       $1,054.90
Year ended July
31, 1994........      1.10%      $1,011.00        0.59%       $1,005.90
Year ended July
31, 1993........     10.51%      $1,105.10        9.95%       $1,099.50
Inception
(February 28,
1992) to July
31, 1992........      8.21%      $1,082.10        7.98%       $1,079.80
Inception
(October 21,
1994) to July
31, 1995........                                                              8.50%      $1,085.00        8.93%       $1,089.30
<CAPTION>
                                                                      AGGREGATE TOTAL RETURN
                                                            (INCLUDING MAXIMUM APPLICABLE SALES CHARGE)
<S>               <C>          <C>           <C>            <C>           <C>          <C>           <C>            <C>
Inception
(February 28,
1992) to July
31, 1997........     43.98%      $1,439.80       45.91%       $1,459.10
Inception
(October 21,
1994) to July
31, 1997........                                                             25.40%      $1,254.00       22.00%       $1,220.00
<CAPTION>
                                                                               YIELD
<S>               <C>          <C>           <C>            <C>           <C>          <C>           <C>            <C>
30 days ended
July 31, 1997...      4.35%                       4.03%                       3.93%                       4.26%
<CAPTION>
                                                                       TAX EQUIVALENT YIELD*
<S>               <C>          <C>           <C>            <C>           <C>          <C>           <C>            <C>
30 days ended
July 31, 1997...      6.04%                       5.60%                       5.46%                       5.92%
</TABLE>    
 
- ----
* Based on a Federal income tax rate of 28%.
 
                                       38
<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 not take into account the
CDSC 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 may be
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 Minnesota 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 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 an interest 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 and/or
distribution expenditures. The Board of Trustees of the Trust may classify and
reclassify the shares of any Series into additional or other 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 will have
exclusive voting rights with respect to matters relating to the account
maintenance and/or distribution expenses, as appropriate, being borne solely by
such class. Each issued and outstanding share of a Series is entitled to one
vote and to participate equally in dividends and distributions declared with
respect to that Series and, upon liquidation or dissolution of the Series, in
the net assets of such Series remaining after satisfaction of outstanding
liabilities, except that, as noted above, expenses relating to distribution
and/or account maintenance of the Class B, Class C and Class D shares are borne
solely by the respective 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, 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     
 
                                       39
<PAGE>
 
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, other than amendments necessary to conform the
Declaration to certain laws or regulations, to change the name of the Trust, or
to make certain non-material changes, without the affirmative vote of a
majority of the outstanding shares of the Trust or of the affected Series or
class, as applicable.     
   
  Under Massachusetts law, shareholders of a business trust may, under certain
circumstances, be held personally liable as partners for the trust's
obligations. However, the risk of a shareholder incurring financial loss on
account of shareholder liability is limited to circumstances in which both
inadequate insurance existed and the trust itself was unable to meet its
obligations.     
   
  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. 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.     
 
COMPUTATION OF OFFERING PRICE PER SHARE
   
  An illustration of the computation of the 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, 1997, as calculated, is set
forth below.     
 
<TABLE>   
<CAPTION>
                                   CLASS A     CLASS B    CLASS C    CLASS D
                                  ---------- ----------- ---------- ----------
<S>                               <C>        <C>         <C>        <C>
Net Assets....................... $8,505,538 $60,072,484 $2,411,704 $4,310,346
                                  ========== =========== ========== ==========
Number of Shares Outstanding.....    761,511   5,378,455    215,941    386,088
                                  ========== =========== ========== ==========
Net Asset Value Per Share (net
 assets divided by number of
 shares outstanding)............. $    11.17 $     11.17 $    11.17 $    11.16
Sales Charge (for Class A and
 Class D shares: 4.00% of
 offering price; 4.17% of net
 asset value per share)*.........        .47          **         **        .47
                                  ---------- ----------- ---------- ----------
Offering Price................... $    11.64 $     11.17 $    11.17 $    11.63
                                  ========== =========== ========== ==========
</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 of shares. 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.
 
                                       40
<PAGE>
 
INDEPENDENT AUDITORS
   
  Deloitte & Touche LLP, 117 Campus Drive, Princeton, New Jersey 08540-6400,
has been selected as the independent auditors of the Fund. The selection of
independent auditors is subject to approval by the independent Trustees of the
Trust. 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.
 
LEGAL COUNSEL
 
  Brown & Wood LLP, One World Trade Center, New York, New York 10048-0557, is
counsel for the Trust.
 
REPORT 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 semiannually 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 of 1933, as amended, 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 their
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 November 3, 1997.     
 
                                       41
<PAGE>
 
                                   APPENDIX I
 
                   ECONOMIC AND FINANCIAL CONDITIONS IN OHIO
   
  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 Ohio
issuers, however, it has not been updated nor will it be updated during the
year. The Trust has not independently verified the information.     
 
  The State of Ohio (the "State") operates on a fiscal biennium for its
appropriations and expenditures. The State finances the majority of its
operations through the State's General Revenue Fund (the "GRF"). The GRF is
funded mainly by the State's personal income tax, sales and use tax, various
other taxes and grants from the Federal government. The State is precluded by
law from ending a fiscal year or a biennium in a deficit position. In 1981 the
State created the Budget Stabilization Fund ("BSF") for purposes of cash
management.
   
  The GRF ending fund and cash balances for the State's 1984-85 through 1996-97
bienniums were as follows:     
 
<TABLE>   
<CAPTION>
                                                    ENDING FUND    ENDING CASH
                                 BEGINNING ENDING     BALANCE        BALANCE
              BIENNIUM            JULY 1   JUNE 30 (IN THOUSANDS) (IN THOUSANDS)
              --------           --------- ------- -------------- --------------
     <S>                         <C>       <C>     <C>            <C>
     1984-85....................   1983     1985      $297,600      $  849,900
     1986-87....................   1985     1987       226,300         632,700
     1988-89....................   1987     1989       475,100         784,268
     1990-91....................   1989     1991       135,365         326,576
     1992-93....................   1991     1993       111,013         393,634
     1994-95....................   1993     1995       928,000       1,312,200
     1996-97....................   1995     1997       834,900       1,400,000
</TABLE>    
   
  State and national fiscal uncertainties during the 1992-93 biennium required
several actions to achieve GRF positive ending balances. To allow time to
complete the resolution of differences, an interim appropriations act was
enacted effective July 1, 1992; the general appropriations act for the entire
biennium was then passed on July 11 and signed by the Governor of the State on
July 25 and included a $200 million transfer from the BSF to the GRF. In Fiscal
Year 1992, when the State's Office of Budget and Management ("OBM") projected
an imbalance in GRF resources and expenditures, the Governor ordered most State
agencies to reduce GRF appropriations spending in the final six months of
Fiscal Year 1992 by a total of approximately $184 million. (Debt service and
lease rental obligations were not affected by the order.) Then, with General
Assembly authorization, in June 1992 the entire $100.4 million BSF balance and
additional amounts from certain other funds were transferred to the GRF. Other
administration revenue and spending actions resolved the remaining GRF
imbalance for Fiscal Year 1992.     
   
  As a first step toward addressing a projected Fiscal Year 1993 GRF shortfall,
then estimated by OBM at approximately $520 million, the Governor ordered,
effective July 1, 1992, selected reductions in Fiscal Year 1993 GRF
appropriations spending totaling $300 million. Appropriations for debt service
(including lease rental appropriations) were expressly excluded from the
Governor's cutback orders. Subsequent executive and legislative actions--
including tax revisions that produced an additional $194.5 million and     
 
                                       42
<PAGE>
 
   
additional appropriations spending reductions totalling approximately $50
million--provided for positive biennium-ending GRF balances. As a first step
toward BSF replenishment, $21 million was deposited in the BSF.     
   
  The GRF budget for the 1994-95 biennium provided for total GRF expenditures
of approximately $30.7 billion, with Fiscal Year 1994 expenditures 9.2% higher
than in Fiscal Year 1993, and Fiscal Year 1995 expenditures 6.6% higher than in
Fiscal Year 1994. As noted above, the GRF ended the 1994-95 biennium with a
fund balance of $928 million and cash balance of $1,312.2 million. As an
additional step toward BSF replenishment, OBM transferred $260.3 million to the
BSF at the end of Fiscal Year 1994 and $535.2 million in July 1995.     
   
  For the 1996-97 biennium, GRF appropriations approximated $33.5 billion. At
the end of Fiscal Year 1996, the following transfers were made from the GRF:
$100 million for elementary and secondary school computer network purposes, $30
million for a new transportation infrastructure fund, and $400.8 million for
temporary personal income tax reductions. At the end of the biennium, the GRF
had fund and cash balances of $834.9 million and $1,400 million, respectively,
which allowed $250 million to be applied to school building construction and
renovation, $94.4 million for a school computer network, $44.2 million for
school textbooks and instructional materials and a distance learning program,
$34.4 million to be transferred to the BSF, and the $262.9 million balance to
an income tax reduction fund.     
   
  The General Appropriations Act for the 1998-99 biennium, passed by the
General Assembly and, with selected vetoes, approved by the Governor in June
1997, provides for total GRF biennial expenditures of approximately $36.1
billion, an increase of 7.8% over the previous appropriations act. The Act
increases spending for primary and secondary education, higher education, and
rehabilitation and corrections, and provides for a 4.5% personal income tax
reduction in 1998.     
   
  As of the end of August 1997, the GRF had a cash balance of $2.8 million, and
the BSF had a fund balance of 862.7 million.     
          
  Litigation pending in federal district court and in the Ohio Court of Claims
contests the Ohio Department of Human Services' ("ODHS") former Medicaid
financial eligibility rules for married couples where one spouse is living in a
nursing facility and the other spouse resides in the community. ODHS
promulgated new eligibility rules effective January 1, 1996. It is appealing an
order of the federal court directing it to provide notice to persons
potentially affected by the former rules from 1990 through 1995. It is not
possible at this time to state whether this appeal will be successful or,
should plaintiffs prevail, the period, beyond the current fiscal year, during
which necessary additional Medicaid expenditures would have to be made.
Plaintiffs have estimated total additional Medicaid expenditures at $600
million for the retroactive period and, based on current law, it is estimated
that the State's share of those additional expenditures is approximately $240
million. The Court of Claims case may come to trial later this year.     
 
  Because the schedule of GRF cash receipts and disbursements do not precisely
coincide, temporary GRF cash flow deficiencies may occur in some months of a
Fiscal Year. Statutory provisions provide for effective management of these
temporary GRF cash deficiencies by permitting the adjustment of payment
schedules and the use of a "Total Operating Fund" ("TOF"). The State has not
and does not do external revenue anticipation borrowing.
 
                                       43
<PAGE>
 
   
  The TOF includes the total consolidated cash balances, revenues,
disbursements and transfers of the GRF and several other specified funds
(including the BSF). The TOF cash balance at August 31, 1997 was $2,741.3
million. Those cash balances are consolidated only for the purpose of meeting
cash flow requirements, and, except for the GRF, a positive cash balance must
be maintained for each discrete fund included in the TOF. The GRF is permitted
to incur a temporary cash deficiency by drawing upon the available consolidated
cash balance in the TOF. The amount of that permitted GRF cash deficiency at
any time is limited to 10% of GRF revenues for the then preceding Fiscal Year
(raised from 7% by December 1992 legislation in order to better avoid the need
for even short delays in payments).     
   
  The State has encountered (and planned for) some monthly GRF cash flow
deficiencies in all recent Fiscal Years. For example, GRF cash flow
deficiencies have ranged from occurring in 10 months of Fiscal Year 1992 (with
$743.14 million being the highest) to four months in Fiscal year 1995 (the
highest being $337.964 million). OBM reports the GRF had cash flow deficiencies
in seven months of Fiscal Year 1996 and in four months of Fiscal Year 1997.
Current OBM estimates project cash flow deficiencies for six months of Fiscal
Year 1998.     
       
  All cash flow deficiencies have been within the TOF limitations discussed
above. Often, the GRF balancing steps described above ameliorated deficiencies
in later months of a Fiscal Year, significantly assisting in producing the
projected positive year-end GRF balances.
 
  The State's Constitution directs or restricts the use of certain revenues.
Highway fees and excise taxes, including gasoline taxes, are limited in use to
highway-related purposes including the payment of interest on certain
securities issued for purposes related to the State's highways. Not less than
50% of the receipts from State income and estate and inheritance taxes must be
returned to the political subdivisions and school districts where such receipts
originated. Since 1987 all net State lottery profits are allocated to
elementary, secondary, vocational and special education program purposes.
       
          
  Under the current financial structure, Ohio's public school districts receive
a major portion (statewide aggregate approximately 44% in recent years) of
their operating moneys from State subsidy programs (the primary portion of
which is known as the "Foundation Program") distributed in accordance with
statutory formulas that take into account both local needs and local taxing
capacity. The Foundation Program amounts have steadily increased in recent
years, including small aggregate increases even in those Fiscal Years in which
appropriations cutbacks were imposed. The State's appropriations for school
funding in the current 1998-99 biennium total $11.4 billion and represent a
14.5% increase over the preceding biennium. School districts also rely heavily
upon receipts from locally voted taxes. In part because of provisions of some
State laws, some school districts have experienced varying degrees of
difficulty in meeting mandated and discretionary increased costs.     
   
  Litigation, similar to that in other states, has been pending questioning the
constitutionality of Ohio's system of school funding. The Ohio Supreme Court
concluded in a decision released March 24, 1997 that major aspects of the
system (including the Foundation Program and certain borrowing programs) are
unconstitutional. The Court also ordered the State to provide for and fund
sufficiently a system complying with the Ohio Constitution, but staying its
order for one year to allow time for responsive corrective actions by the
General Assembly. In response to a State motion for reconsideration and
clarification, the Court on April 25, 1997 indicated that property taxes may
still play a role in, but "can no longer be the primary means" of, school
funding. The Court also confirmed that contractual repayment provisions of
certain debt obligations issued for school funding will remain valid until the
stay terminates.     
 
                                       44
<PAGE>
 
   
  The General Assembly is in the process of revising the State's school funding
programs to comply with the Court's decision; however, the impact of such
compliance on the State's budget and tax structure cannot be predicted at this
time.     
   
  Federal courts have ruled that the State shared joint liability with the
local school districts for segregation in public schools in Cincinnati,
Cleveland, Columbus, Dayton and Lorain. Subsequent trial court orders directed
that remedial costs be shared equally by the State and the respective local
districts. For that purpose the following amounts have been expended:
$75,752,659 in the 1992-93 biennium, $119,382,294 in the 1994-95 biennium, and
$144,759,340 in the 1996-97 biennium. $50,400,000 has been appropriated for
Fiscal Year 1998 with additional funds for Fiscal Year 1999.     
 
  The State's Constitution expressly provides that the State General Assembly
has no power to pass laws impairing the obligations of contracts.
 
  At the present time, the State does not levy any ad valorem taxes on real or
tangible personal property. Local taxing districts and political subdivisions
currently levy such taxes. The State's Constitution limits the amount of the
aggregate levy of ad valorem property taxes, without a vote of the electors or
municipal charter provision, to 1% of true value in money. Statutes also limit
the amount of the aggregate levy, without a vote or charter provision.
   
  Economic activity in the State, as in many other industrially developed
states, tends to be more cyclical than in some other states and in the nation
as a whole. Although manufacturing (including auto-related manufacturing)
remains an important part of the State's economy, the greatest growth in Ohio
employment in recent years, consistent with national trends, has been in the
nonmanufacturing area. Ohio ranked fourth in the nation in 1991 gross state
product derived from manufacturing. That income was 26.3% of total Ohio gross
state product, compared to 17.1% of that total being from "services." In
addition, agriculture and "agribusiness" continue as important elements of the
Ohio economy. Ohio continues as a major "headquarters" state. Of the top 500
corporations (industrial and service) as reported in 1997 by Fortune magazine,
29 had headquarters in Ohio, placing Ohio sixth as "headquarters" state for
corporations. Payroll employment in Ohio, in the diversifying employment base,
showed a steady upward trend until 1979, then decreased until 1982. It reached
an all-time high in the summer of 1993 after a slight decrease early in 1992
and then decreased slightly, and has reached a new high in 1996. Growth in
recent years has been concentrated among nonmanufacturing industries, with
manufacturing employment tapering off since its 1969 peak. Nonmanufacturing
industries now employ approximately 79.0% of all payroll workers (non-
agricultural) in Ohio. Historically, the average monthly unemployment rate in
Ohio has been higher than the average figures for the United States, although
in recent years, the average unemployment rate in Ohio has been lower than the
national rate. Ohio has been below the national rate through August 1997, as
well.     
 
  Ohio's 1990 decennial census population of over 10,840,000 indicated a 0.5%
population growth since 1980 and Ohio as ranking seventh among the states in
population. In 1980 it ranked sixth. The State's 1995 population was estimated
at 11,150,000, still seventh among the United States.
   
  As of the date of this Statement of Additional Information, the State's
general obligation bonds are rated Aa1, AA+ and AA+ by Moody's, Standard &
Poor's and Fitch, respectively.     
 
                                       45
<PAGE>
 
                                  APPENDIX II
 
                           RATINGS OF MUNICIPAL BONDS
 
DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S ("MOODY'S") MUNICIPAL BOND
RATINGS
 
<TABLE>
 <C>     <S>
 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 payment 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.
</TABLE>
 
 
                                       46
<PAGE>
 
  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.
 
  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 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 ability of
rated issuers:     
   
  Issuers rated Prime-1 (or supporting institutions) have a superior ability
for repayment of short-term promissory obligations. Prime-1 repayment ability
will often be evidenced by many of the following characteristics: leading
market positions in well established industries; high rates of return on funds
employed; conservative capitalization structure with moderate reliance on debt
and ample asset protection; broad margins in earnings 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 supporting institutions) have a strong ability 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, may 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 supporting institutions) have an acceptable ability
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 may require 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 SERVICES ("STANDARD & POOR'S")
MUNICIPAL DEBT RATINGS     
   
  A Standard & Poor's municipal debt rating is a current opinion of the
creditworthiness of an obligor with respect to financial obligation, a specific
class of financial obligations, or a specific financial program. It takes into
consideration the creditworthiness of guarantors, insurers or other forms of
credit enhancement on the obligation.     
   
  The debt rating is not a recommendation to purchase, sell or hold a financial
obligation, inasmuch as it does not comment as to market price or suitability
for a particular investor.     
 
                                       47
<PAGE>
 
   
  The ratings are based on current information furnished by the obligors or
obtained by Standard & Poor's from other sources it 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 based on other circumstances.     
 
  The ratings are based, in varying degrees, on the following considerations:
     
    I. Likelihood of payment--capacity and willingness of the obligor to meet
  its financial commitment on an obligation in accordance with the terms of
  the obligation;     
     
    II. Nature of and provisions of the obligation; and     
 
    III. Protection afforded to, 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.
 
<TABLE>   
 <C>     <S>
 AAA     Debt rated "AAA" has the highest rating assigned by Standard &
         Poor's. Capacity to meet its financial commitment on the obligation
         is extremely strong.
 AA      Debt rated "AA" differs from the highest-rated obligations only in
         small degree. The obligor's capacity to meet its financial commitment
         on the obligation is very strong.
 A       Debt rated "A" is somewhat more susceptible to the adverse effects of
         changes in circumstances and economic conditions than debt in higher-
         rated categories. However, the obligor's capacity to meet its
         financial commitment on the obligation is still strong.
 BBB     Debt rated "BBB" exhibits adequate protection parameters. However,
         adverse economic conditions or changing circumstances are more likely
         to lead to a weakened capacity of the obligor to meet its financial
         commitment on the obligation.
 BB      Bonds rated "BB", "B", "CCC", "CC" and "C" are regarded as having
 B       significant speculative characteristics. "BB" indicates the least
 CCC     degree of speculation and "C" the highest degree of speculation.
 CC      While such debt will likely have some quality and protective
 C       characteristics, these may be outweighed by large uncertainties or
         major risk exposures to adverse conditions.
 D       Debt rated "D" is in payment default. The "D" rating category is used
         when payments on an obligation 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 or the taking of a similar action if payments on an
         obligation are jeopardized.
</TABLE>    
 
  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.
 
                                       48
<PAGE>
 
       
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 several categories, ranging from "A-1"
for the highest quality obligations to "D" for the lowest. These categories are
as follows:
 
<TABLE>   
   <C>  <S>
   A-1  This designation 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 an adequate capacity for timely
        payment. They are, however, 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.
</TABLE>    
 
  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.
   
DESCRIPTION OF STANDARD & POOR'S SHORT-TERM ISSUE CREDIT RATINGS     
   
  A Standard & Poor's municipal note rating reflects the liquidity factors 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:
 
<TABLE>   
 <C>   <S>
 SP-1  Strong capacity to pay principal and interest. An issue determined to
       possess a very strong capacity to pay debt service is given a "+"
       designation.
 SP-2  Satisfactory capacity to pay principal and interest, with some
       vulnerability to adverse financial and economic changes over the term of
       the notes.
 SP-3  Speculative capacity to pay principal and interest.
</TABLE>    
 
                                       49
<PAGE>
 
       
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 any guarantor,
as well as the economic and political environment that might affect the
issuer's future financial strength and credit quality.
 
  Fitch ratings do not reflect any credit enhancement that may be provided by
insurance policies or financial guaranties unless otherwise indicated.
   
  Bonds carrying the same ratings 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.
 
<TABLE>   
 <C>     <S>
 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 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.
</TABLE>    
 
                                       50
<PAGE>
 
  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.
 
<TABLE>   
 <C>          <S>
 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.
</TABLE>    
   
  Ratings Outlook: An outlook is used to describe the most likely direction of
any rating change over the intermediate term. It is described as "Positive" or
"Negative". The absence of a designation indicates a stable outlook.     
 
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 particular 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.
 
<TABLE>
 <C>               <S>
 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.
</TABLE>
 
                                       51
<PAGE>
 
<TABLE>   
 <C>               <S>
 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               Bonds are in default of interest and/or principal payments.
 DD                Such bonds are extremely speculative and should be valued on
 D                 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.
</TABLE>    
   
  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:
 
<TABLE>
 <C>          <S>
 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 the "F-1+" and "F-1"
              categories.
 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.
 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.
</TABLE>
 
                                       52
<PAGE>
 
INDEPENDENT AUDITORS' REPORT
 
The Board of Trustees and Shareholders,
Merrill Lynch Ohio 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 Ohio Municipal Bond Fund of
Merrill Lynch Multi-State Municipal Series Trust as of July 31, 1997, 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 five-year period then ended.
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, 1997 by correspondence with the custodian and broker. 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 Ohio
Municipal Bond Fund of Merrill Lynch Multi-State Municipal Series Trust as of
July 31, 1997, 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 5, 1997     
 
                                       53
<PAGE>
 
<TABLE>
<CAPTION>

Merrill Lynch Ohio Municipal Bond Fund                                                                              July 31, 1997

SCHEDULE OF INVESTMENTS                                                                                             (in Thousands)

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

<S>      <C>      <C>      <C>                                                                                          <C>
Ohio -- 97.3%

NR*       Baa1      $900    Ashtabula County, Ohio, IDR, Refunding (Ashland Oil Inc. Project), Series A,
                            6.90% due 5/01/2010                                                                            $967
AAA       Aaa      1,000    Avon, Ohio, Local School District, GO, UT, 6% due 12/01/2020 (b)                              1,075
NR*       A        4,000    Barberton, Ohio, Hospital Facilities Revenue Bonds (Barberton Citizens Hospital Co.
                            Project), 7.25% due 1/01/2002 (h)                                                             4,538
AAA       Aaa      2,620    Brecksville-Broadview Heights, Ohio, City School District, UT, 5.25% due 12/01/2021           2,609
                            Cleveland, Ohio, Public Power System, Revenue Refunding Bonds, First Mortgage, 
                            Series 1 (d): 
AAA       Aaa      1,500    5.125% due 11/15/2018                                                                         1,485 
AAA       Aaa      2,000    5% due 11/15/2020                                                                             1,944
AAA       Aaa      1,000    5% due 11/15/2024                                                                               968
AAA       Aaa      3,665    Cleveland, Ohio, Water Works Revenue Bonds, First Mortgage, Series F-92 A, 6.25%
                            due 1/01/2015 (b)                                                                             3,962
                            Cuyahoga County, Ohio, M/F Revenue Bonds (Dalebridge Apartments), AMT (e):
NR*       Aaa      1,000    6.50% due 10/20/2020                                                                          1,052
NR*       Aaa      2,850    6.60% due 10/20/2030                                                                          2,994
BBB       NR*      1,000    Dayton, Ohio, Special Facilities Revenue Refunding Bonds (Emery Air Freight Corp./Emery
                            Worldwide Air Inc.), Series F, 6.05% due 10/01/2009                                           1,056
AAA       Aaa      1,500    Dublin, Ohio, City School District Revenue Refunding Bonds,  5% due 12/01/2019 (d)            1,451
A         A        2,120    Erie County, Ohio, Hospital Improvement Revenue Refunding Bonds (Firelands
                            Community Hospital Project), 6.75% due 1/01/2015                                              2,306
AAA       Aaa      1,200    Finneytown, Ohio, Local School District Revenue Bonds, UT, 5.80% due 12/01/2024 (c)           1,273
AAA       Aaa      1,200    Huron County, Ohio, Human Services, Building Revenue Bonds, 7.25% due 12/01/2013 (d)          1,422
NR*       Aaa      3,030    Kent, Ohio, M/F Housing Mortgage Revenue Bonds (Silver Meadows), AMT, 7.30% due
                            12/20/2036 (e)                                                                                3,374
AAA       Aaa      1,740    Lakota, Ohio, Local School District, GO, UT, 7% due 12/01/2010 (b)                            2,125
A         NR*      1,660    Loveland, Ohio, City School District, GO, UT, 6.65% due 12/01/2015                            1,826
BBB+      NR*      2,000    Lucas County, Ohio, Hospital Revenue Bonds (Flower Hospital), 6.125% due 12/01/2004 (h)       2,218
AAA       Aaa      2,500    Mahoning County, Ohio, Hospital Facilities Revenue Refunding Bonds (YHA Inc. Project),
                            Series A, 7% due 10/15/2014 (d)                                                               2,744
A-        A3       2,000    Moraine, Ohio, Solid Waste Disposal Revenue Bonds (General Motors Corp. Project),
                            AMT, 6.75% due 7/01/2014                                                                      2,341
AAA       Aaa      3,000    North Canton City, Ohio, School District Improvement Bonds, GO, UT, 6.70% due 
                            12/01/2019 (b)                                                                                3,417
                            Ohio HFA, Residential Mortgage Revenue Bonds, AMT (e):
AAA       NR*      1,750    Series A-1, 6.15% due 3/01/2029                                                               1,812
AAA       NR*        965    Series B-2, 6.70% due 3/01/2025                                                               1,026
AAA       Aaa      1,050    Ohio HFA, S/F Mortgage Revenue Bonds, AMT, RIB, Series B-4, 9.669% due 3/31/2031 (e)(g)       1,183
A1+       NR*      1,000    Ohio State Air Quality Development Authority Revenue Bonds, VRDN, Series B, 3.50% 
                            due 12/01/2015 (a)                                                                            1,000
</TABLE> 
                                       54
<PAGE>
 
<TABLE> 
<S>       <C>      <C>      <C>                                                                                           <C> 
                            Ohio State Air Quality Development Authority, Revenue Refunding Bonds:
NR*       Baa1     1,000    (Ashland Oil Inc. Project), 6.85% due 4/01/2010                                               1,058
A1+       VMIG1+     600    (Cincinnati Gas & Electric), VRDN, Series B, 3.55% due 9/01/2030 (a)                            600
AA-       Aa3      4,200    (Coll - Dayton Power & Light Project), Series B, 6.40% due 8/15/2027                          4,508
AAA       Aaa      1,505    PCR (Ohio-Edison), Series B, 7.10% due 6/01/2018 (c)                                          1,646
                            Ohio State Higher Educational Facility, Commission  Revenue Bonds:
AA        A1       1,000    (Denison University Project), 5.25% due 11/01/2016                                            1,012
NR*       NR*      1,000    (University of Findlay Project), 6.125% due 9/01/2016                                         1,039
AA        Aa       1,410    Ohio State Higher Educational Facility, Crossover Revenue Refunding Bonds (Case Western
                            Reserve University), 6.25% due 10/01/2016                                                     1,622
AAA       Aaa      1,000    Ohio State Water Development Authority, Pollution Control Facilities Revenue Refunding 
                            Bonds (Pennsylvania Power Co. Project), 6.15% due 8/01/2023 (b)                               1,078
A         A2       2,000    Ohio State Water Development Authority, Solid Waste Disposal Revenue Bonds (North Star
                            BHP Steel Project-Broken Hill), AMT, 6.45% due 9/01/2020                                      2,171
A1+       Aaa      1,000    Scioto County, Ohio, Hospital Facilities Revenue Bonds (VHA Central Inc. Capital Asset),
                            VRDN, Series E, 3.65% due 12/01/2025 (a)(b)                                                   1,000
NR*       Aa3      1,000    Toledo Lucas County, Ohio, Port Authority, Development Revenue Refunding Bonds
                            (Cargill Inc. Project), 5.90% due 12/01/2015                                                  1,050
AAA       Aaa      1,000    University of Akron, Ohio, Refunding, 5.25% due  1/01/2022 (b)                                  996
AAA       Aaa      1,000    Upper Arlington, Ohio, City School District, UT, 5.25% due 12/01/2022 (d)                       996
AAA       Aaa      2,000    Westerville, Ohio, Minerva Park and Blendon Joint Township, Hospital District Revenue
                            Refunding Bonds (Saint Ann's Hospital), Series B, 7% due 9/15/2012 (b)(f)                     2,331
Puerto Rico -- 3.6%
A1+       Baa1     2,500    Puerto Rico Commonwealth, Highway and Transportation Authority, Highway Revenue 
                            Bonds, RITES, Series X, 6.243% due 7/01/2004 (g)                                              2,706
Total Investments (Cost -- $70,406) -- 100.9%                                                                            75,981
Liabilities in Excess of Other Assets -- (0.9%)                                                                            (681)
                                                                                                                        -------
Net Assets -- 100.0%                                                                                                    $75,300
                                                                                                                        =======
(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, 1997.
(b) AMBAC Insured.
(c) FGIC Insured.
(d) MBIA Insured.
(e) GNMA Collateralized.
(f) Escrowed to Maturity.
(g) 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, 1997.
(h) Prerefunded.
*   Not Rated. 
+   Highest short-term rating by Moody's Investors Service, Inc.
Ratings of issues shown have not been audited by Deloitte & Touche LLP. 

See Notes to Financial Statements.

PORTFOLIO ABBREVIATIONS

To Simplify the listings of Merrill Lynch Ohio          AMT     Alternative Minimum Tax (subject to)
Municipal Bond Fund's portfolio holdings in the         GO      General Obligation Bonds
Schedule of Investments, we have abbreviated the        HFA     Housing Finance Agency
names of many of the securities according to the        IDR     Industrial Development Revenue Bonds
list at right.                                          M/F     Multi-Family
                                                        PCR     Pollution Control Revenue Bonds
                                                        RIB     Residual Interest Bonds
                                                        RITES   Residual Interest Tax-Exempt Securities
                                                        S/F     Single-Family
                                                        UT      Unlimited Tax
                                                        VRDN    Variable Rate Demand Notes
</TABLE>

                                       55
<PAGE>
 
FINANCIAL INFORMATION

<TABLE>
<CAPTION>
Statement of Assets and Liabilities as of July 31, 1997
<S>                     <C>                                                                <C>           <C>
Assets:                  Investments, at value (identified cost -- $70,406,059) (Note 1a)                 $75,981,389
                         Cash                                                                                 109,539
                         Receivables:
                         Interest                                                            $927,821
                         Beneficial interest sold                                              23,698         951,519
                                                                                         ------------  
                         Prepaid registration fees and other assets (Note 1e)                                     951
                                                                                                         ------------
                         Total assets                                                                      77,043,398
                                                                                                         ------------
Liabilities:             Payables:
                         Securities purchased                                               1,453,227
                         Beneficial interest redeemed                                          99,734
                         Dividends to shareholders (Note 1f)                                   91,273
                         Investment adviser (Note 2)                                           34,900
                         Distributor (Note 2)                                                  26,924       1,706,058
                                                                                         ------------
                         Accrued expenses and other liabilities                                                37,268
                                                                                                         ------------
                         Total liabilities                                                                  1,743,326
                                                                                                         ------------
Net Assets:              Net assets                                                                       $75,300,072
                                                                                                         ============
Net Assets               Class A Shares of beneficial interest, $.10 par value, 
Consist of:              unlimited number of shares authorized                                                $76,151
                         Class B Shares of beneficial interest, $.10 par value, 
                         unlimited number of shares authorized                                                537,846
                         Class C Shares of beneficial interest, $.10 par value, 
                         unlimited number of shares authorized                                                 21,594
                         Class D Shares of beneficial interest, $.10 par value, 
                         unlimited number of shares authorized                                                 38,609
                         Paid-in capital in excess of par                                                  70,012,823
                         Accumulated realized capital losses on investments -- 
                         net (Note 5)                                                                        (962,281)
                         Unrealized appreciation on investments -- net                                      5,575,330
                                                                                                         ------------
                         Net assets                                                                       $75,300,072
                                                                                                         ============
Net Asset Value:         Class A -- Based on net assets of $8,505,538 and 761,511 
                         shares of beneficial interest outstanding                                             $11.17
                                                                                                         ============
                         Class B -- Based on net assets of $60,072,484 and 5,378,455 
                         shares of beneficial interest outstanding                                             $11.17
                                                                                                         ============
                         Class C -- Based on net assets of $2,411,704 and 215,941 
                         shares of beneficial interest outstanding                                             $11.17
                                                                                                         ============
                         Class D -- Based on net assets of $4,310,346 and 386,088 
                         shares of beneficial interest outstanding                                             $11.16
                                                                                                         ============
                         See Notes to Financial Statements.

</TABLE>

                                       56
<PAGE>
 
<TABLE>
<CAPTION>

Statement of Operations
                                                                                                             For the Year Ended 
                                                                                                               July 31, 1997
<S>                 <C>                                                                                          <C>
Investment Income    Interest and amortization of premium and discount earned                                     $4,468,647
(Note 1d):
Expenses:            Investment advisory fees (Note 2)                                          $418,770
                     Account maintenance and distribution fees -- Class B (Note 2)               310,021
                     Professional fees                                                            49,663
                     Accounting services (Note 2)                                                 44,658
                     Transfer agent fees -- Class B (Note 2)                                      32,104
                     Printing and shareholder reports                                             28,614
                     Registration fees (Note 1e)                                                  18,435
                     Account maintenance and distribution fees -- Class C (Note 2)                15,210
                     Amortization of organization expenses (Note 1e)                               6,777
                     Pricing fees                                                                  4,992
                     Custodian fees                                                                4,328
                     Account maintenance fees -- Class D (Note 2)                                  3,931
                     Transfer agent fees --  Class A (Note 2)                                      3,185
                     Transfer agent fees -- Class D (Note 2)                                       1,633
                     Transfer agent fees -- Class C (Note 2)                                       1,320
                     Trustees' fees and expenses                                                     234
                                                                                            ------------
                     Total expenses                                                                                  943,875
                                                                                                                ------------
                     Investment income -- net                                                                      3,524,772
                                                                                                                ------------
Realized &           Realized gain on investments -- net                                                             803,076
Unrealized Gain on   Change in unrealized appreciation on investments -- net                                       2,393,293
Investments -- Net                                                                                              ------------
(Notes 1b, 1d & 3):  Net Increase in Net Assets Resulting from Operations                                         $6,721,141
                                                                                                                ============

                     See Notes to Financial Statements.

</TABLE>

                                       57
<PAGE>
 
<TABLE>
<CAPTION>

Statements of Changes in Net Assets
                                                                                             For the Year Ended July 31, 
                                                                                         -------------------------------
                                                                                               1997               1996
<S>                           <C>                                                         <C>                <C>
Increase (Decrease) in Net Assets:
Operations:                    Investment income -- net                                    $3,524,772         $3,607,605
                               Realized gain on investments -- net                            803,076             58,034
                               Change in unrealized appreciation on investments -- net      2,393,293            854,639
                                                                                         ------------       ------------
                               Net increase in net assets resulting from operations         6,721,141          4,520,278
                                                                                         ------------       ------------
Dividends to                   Investment income -- net:
Shareholders                   Class A                                                       (388,948)          (373,206)
(Note 1f):                     Class B                                                     (2,827,393)        (2,995,936)
                               Class C                                                       (113,014)           (76,853)
                               Class D                                                       (195,417)          (161,610)
                                                                                         ------------       ------------
                               Net decrease in net assets resulting from dividends 
                               to shareholders                                             (3,524,772)        (3,607,605)
                                                                                         ------------       ------------
Beneficial Interest            Net increase (decrease) in net assets derived 
Transactions                   from beneficial interest transactions                       (5,807,300)         1,552,305
(Note 4):                                                                                ------------       ------------

Net Assets:                    Total increase (decrease) in net assets                     (2,610,931)         2,464,978
                               Beginning of year                                           77,911,003         75,446,025
                                                                                         ------------       ------------
                               End of year                                                $75,300,072        $77,911,003
                                                                                         ------------       ------------
                               See Notes to Financial Statements.

</TABLE>

                                       58
<PAGE>
 
<TABLE>
<CAPTION>

Financial Highlights

The following per share data and ratios have been derived
from information provided in the financial statements.                                          Class A
                                                                -----------------------------------------------------------------
                                                                                     For the Year Ended July 31,
                                                                -----------------------------------------------------------------
Increase (Decrease) in Net Asset Value:                             1997          1996           1995          1994          1993
<S>                    <C>                                        <C>           <C>            <C>           <C>          <C>
Per Share               Net asset value, beginning of year         $10.70        $10.56         $10.50        $11.02       $10.56
Operating                                                       ---------     ---------      ---------     ---------    ---------
Performance:            Investment income -- net                      .55           .54            .55           .56          .58
                        Realized and unrealized gain (loss) on 
                        investments -- net                            .47           .14            .06          (.43)         .49
                                                                ---------     ---------      ---------     ---------    ---------
                        Total from investment operations             1.02           .68            .61           .13         1.07
                                                                ---------     ---------      ---------     ---------    ---------
                        Less dividends and distributions:
                        Investment income -- net                     (.55)         (.54)          (.55)         (.56)        (.58)
                        Realized gain on investments -- net            --            --             --            --         (.03)
                        In excess of realized gain on 
                        investments -- net                             --            --             --          (.09)          --
                                                                ---------     ---------      ---------     ---------    ---------
                        Total dividends and distributions            (.55)         (.54)          (.55)         (.65)        (.61)
                                                                ---------     ---------      ---------     ---------    ---------
                        Net asset value, end of year               $11.17        $10.70         $10.56        $10.50       $11.02
                                                                =========     =========      =========     =========    =========
Total Investment        Based on net asset value per share           9.80%         6.56%          6.03%         1.10%       10.51%
Return:*                                                        =========     =========      =========     =========    =========

Ratios to Average       Expenses, net of reimbursement                .80%          .87%           .86%          .65%         .51%
Net Assets:
                                                                =========     =========      =========     =========    =========
                        Expenses                                      .80%          .87%           .89%          .89%        1.04%
                                                                =========     =========      =========     =========    =========
                        Investment income -- net                     5.07%         5.03%          5.30%         5.12%        5.44%
                                                                =========     =========      =========     =========    =========

Supplemental            Net assets, end of year (in thousands)     $8,506        $7,281         $7,270        $9,373       $8,446
Data                                                            =========     =========      =========     =========    =========
                        Portfolio turnover                          52.57%       118.21%        169.34%        44.83%       41.51%
                                                                =========     =========      =========     =========    =========

                       *Total investment returns exclude the effects of sales loads.
                        See Notes to Financial Statements.

</TABLE>

                                       59
<PAGE>
 
<TABLE>
<CAPTION>

The following per share data and ratios have been derived
from information provided in the financial statements.                                          Class B
                                                                -----------------------------------------------------------------
                                                                                     For the Year Ended July 31,
                                                                -----------------------------------------------------------------
Increase (Decrease) in Net Asset Value:                             1997          1996          1995          1994          1993
<S>                    <C>                                        <C>           <C>            <C>           <C>          <C>
Per Share               Net asset value, beginning of year         $10.70        $10.56         $10.50        $11.02       $10.56
Operating                                                       ---------     ---------      ---------     ---------    ---------
Performance:            Investment income -- net                      .49           .49            .49           .50          .52
                        Realized and unrealized gain (loss) on 
                        investments  -- net                           .47           .14            .06          (.43)         .49
                                                                ---------     ---------      ---------     ---------    ---------
                        Total from investment operations              .96           .63            .55           .07         1.01
                                                                ---------     ---------      ---------     ---------    ---------
                        Less dividends and distributions:
                        Investment income  -- net                    (.49)         (.49)          (.49)         (.50)        (.52)
                        Realized gain on investments  -- net           --            --             --            --         (.03)
                        In excess of realized gain on 
                        investments -- net                             --            --             --          (.09)          --
                                                                ---------     ---------      ---------     ---------    ---------
                        Total dividends and distributions            (.49)         (.49)          (.49)         (.59)        (.55)
                                                                ---------     ---------      ---------     ---------    ---------
                        Net asset value, end of year               $11.17        $10.70         $10.56        $10.50       $11.02
                                                                =========     =========      =========     =========    =========

Total Investment        Based on net asset value per share           9.25%         6.01%          5.49%          .59%        9.95%
Return*                                                         =========     =========      =========     =========    =========

Ratios to Average       Expenses, net of reimbursement               1.31%         1.38%          1.37%         1.16%        1.02%
Net assets:                                                     =========     =========      =========     =========    =========
                        Expenses                                     1.31%         1.38%          1.40%         1.39%        1.55%
                                                                =========     =========      =========     =========    =========
                        Investment income -- net                     4.56%         4.52%          4.79%         4.61%        4.93%
                                                                =========     =========      =========     =========    =========

Supplemental            Net assets, end of year (in thousands)    $60,072       $64,397        $64,068       $65,610      $53,341
Data:                                                           =========     =========      =========     =========    =========
                        Portfolio turnover                          52.57%       118.21%        169.34%        44.83%       41.51%
                                                                =========     =========      =========     =========    =========
                      * Total investment returns exclude the effects of sales loads.
                        See Notes to Financial Statements.

</TABLE>

                                       60
<PAGE>
 
<TABLE>
<CAPTION>
                                                                            Class C                            Class D
                                                            ----------------------------------    ----------------------------
                                                                 For the           For the            For the         For the
The following per share data and ratios have been derived          Year             Period              Year           Period
from information provided in the financial statements.            Ended            Oct. 21,             Ended        Oct. 21,
                                                                 July 31,          1994+ to           July 31,       1994+ to
                                                           ------------------      July 31,       ----------------    July 31,
Increase (Decrease) in Net Asset Value:                    1997          1996        1995         1997        1996      1995
<S>            <C>                                      <C>           <C>         <C>          <C>         <C>        <C>
Per Share       Net asset value, beginning of period     $10.70        $10.56      $10.09       $10.70      $10.56     $10.09
Operating                                             ---------     ---------   ---------    ---------   ---------  ---------
Performance:    Investment income -- net                    .48           .48         .37          .54         .53        .41
                Realized and unrealized gain on 
                investments -- net                          .47           .14         .47          .46         .14        .47
                                                      ---------     ---------   ---------    ---------   ---------  ---------
                Total from investment operations            .95           .62         .84         1.00         .67        .88
                                                      ---------     ---------   ---------    ---------   ---------  ---------
                Less dividends from investment 
                income -- net                              (.48)         (.48)       (.37)        (.54)       (.53)      (.41)
                                                      ---------     ---------   ---------    ---------   ---------  ---------
                Net asset value, end of period           $11.17        $10.70      $10.56       $11.16      $10.70     $10.56
                                                      =========     =========   =========    =========   =========  =========
Total 
Investment      Based on net asset value per share         9.14%         5.90%       8.50%++      9.60%       6.45%      8.93%++++
Return:**                                             =========     =========   =========    =========   =========  =========

Ratios to 
Average         Expenses                                   1.41%         1.49%       1.50%*        .90%        .97%       .99%*
Net Assets:                                           =========     =========   =========    =========   =========  =========
                Investment income -- net                   4.46%         4.42%       4.62%*       4.97%       4.93%      5.17%*
                                                      =========     =========   =========    =========   =========  =========
Supplemental    Net assets, end of period 
Data:           (in thousands)                           $2,412        $2,720        $874       $4,310      $3,513     $3,234
                                                      =========     =========   =========    =========   =========  =========
                 Portfolio turnover                       52.57%       118.21%     169.34%       52.57%     118.21%    169.34%
                                                      =========     =========   =========    =========   =========  =========
              *  Annualized.
              ** Total investment returns exclude the effects of sales loads.
              +  Commencement of Operations.
              ++ Aggregate total investment return.
                 See Notes to Financial Statements.

</TABLE>

                                       61
<PAGE>
 
Merrill Lynch Ohio Municipal Bond Fund             July 31, 1997

NOTES TO FINANCIAL STATEMENTS

1. Significant Accounting Policies:
Merrill Lynch Ohio 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 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.

(bullet) 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 monthly. Distributions of capital 
gains are recorded on the ex-dividend dates.

                                       62
<PAGE>
 
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 a limited partner. 
The Fund had also entered into a Distribution Agreement and Distri-
bution Plans with Merill 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.

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      
              Maintenance      Distribution 
                  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, 1997, 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        $216     $2,028
Class D        $449     $3,930

For the year ended July 31, 1997, MLPF&S received contingent deferred 
sales charges of $116,317 and $518 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.

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, MLFDS, MLFD, and/or ML & Co.

3. Investments:
Purchases and sales of investments, excluding short-term securities, 
for the year ended July 31, 1997 were $38,744,323 and $38,154,029, 
respectively.

Net realized and unrealized gains as of July 31, 1997 were as follows:

                                  Realized     Unrealized
                                    Gains         Gains 

Long-term investments            $803,076     $5,575,330
                               ----------     ----------
Total                            $803,076     $5,575,330 
                               ==========     ==========

As of July 31, 1997, net unrealized appreciation for Federal income 
tax purposes aggregated $5,575,330, all of which related to 
appreciated securities. The aggregate cost of investments at 
July 31, 1997 for Federal income tax purposes was $70,406,059.

                                       63
<PAGE>
 
4. Beneficial Interest Transactions:
Net increase (decrease) in net assets derived from beneficial interest 
transactions was $(5,807,300) and $1,552,305 for the years ended July 
31, 1997 and July 31, 1996, respectively.

Transactions in shares of beneficial interest for each class were as 
follows:
Class A Shares for the Year                           Dollar
Ended July 31, 1997                    Shares         Amount

Shares sold                           281,570     $3,056,459
Shares issued to shareholders 
in reinvestment of dividends           16,807        182,136
                                  -----------    -----------
Total issued                          298,377      3,238,595
Shares redeemed                      (217,206)    (2,351,978)
                                  -----------    -----------
Net increase                           81,171       $886,617
                                  ===========    ===========

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

Shares sold                            86,942       $941,587
Shares issued to shareholders 
in reinvestment of dividends           14,338        153,697
                                  -----------    -----------
Total issued                          101,280      1,095,284
Shares redeemed                      (109,186)    (1,171,549)
                                  -----------    -----------
Net decrease                           (7,906)      $(76,265)
                                  ===========   ============

Class B Shares for the Year                           Dollar
Ended July 31, 1997                    Shares         Amount

Shares sold                           764,584     $8,274,531
Shares issued to shareholders 
in reinvestment of dividends          142,649      1,544,704
                                  -----------   ------------
Total issued                          907,233      9,819,235
Automatic conversion of shares        (40,791)      (443,365)
Shares redeemed                    (1,505,375)   (16,285,923)
                                  -----------    -----------
Net decrease                         (638,933)   $(6,910,053)
                                  ===========   ============

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

Shares sold                         1,044,627    $11,201,909
Shares issued to shareholders 
in reinvestment of dividends          156,760      1,680,914
                                  -----------   ------------
Total issued                        1,201,387     12,882,823
Automatic conversion of shares        (24,446)      (258,404)
Shares redeemed                    (1,224,936)   (13,097,953)
                                  -----------   ------------
Net decrease                          (47,995)     $(473,534)
                                  ===========   ============

Class C Shares for the Year                           Dollar
Ended July 31, 1997                    Shares         Amount

Shares sold                           102,395     $1,112,984
Shares issued to shareholders 
in reinvestment of dividends            7,211         78,087
                                  -----------  -------------
Total issued                          109,606      1,191,071
Shares redeemed                      (147,865)    (1,601,650)
                                  -----------  -------------
Net decrease                          (38,259)     $(410,579)
                                  ===========  =============

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

Shares sold                           193,104     $2,070,410
Shares issued to shareholders 
in reinvestment of dividends            4,969         53,252
                                  -----------  -------------
Total issued                          198,073      2,123,662
Shares redeemed                       (26,599)      (284,250)
                                  -----------  -------------
Net increase                          171,474     $1,839,412
                                  ===========  =============

Class D Shares for the Year                           Dollar
Ended July 31, 1997                    Shares         Amount

Shares sold                            48,281       $522,360
Automatic conversion of shares         40,810        443,365
Shares issued to shareholders 
in reinvestment of dividends            4,829         52,300
                                  -----------  -------------
Total issued                           93,920      1,018,025
Shares redeemed                       (36,222)      (391,310)
                                  -----------  -------------
Net increase                           57,698       $626,715
                                  ===========  =============

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

Shares sold                            91,966        $997,428
Automatic conversion of shares         24,448         258,404
Shares issued to shareholders 
in reinvestment of dividends            3,739          40,076
                                  -----------   -------------
Total issued                          120,153       1,295,908
Shares redeemed                       (98,084)     (1,033,216)
                                  -----------   -------------
Net increase                           22,069        $262,692
                                  ===========   =============

5. Capital Loss Carryforward:
At July 31, 1997, the Fund had a net capital loss carryforward of 
approximately $206,000, all of which expires in 2004. This amount will 
be available to offset like amounts of any future taxable gains.

                                       64
<PAGE>
 
                      
                   [This Page Intentionally Left Blank]     
<PAGE>
 
                      
                   [This Page Intentionally Left Blank]     
<PAGE>
 
                      
                   [This Page Intentionally Left Blank]     
<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............................................   5
 Description of Temporary Investments......................................   7
 Repurchase Agreements.....................................................   8
 Financial Futures Transactions and Options................................   9
Investment Restrictions....................................................  13
Management of the Trust....................................................  15
 Trustees and Officers.....................................................  15
 Compensation of Trustees..................................................  17
 Management and Advisory Arrangements......................................  17
Purchase of Shares.........................................................  19
 Initial Sales Charge Alternatives--Class A and
  Class D Shares...........................................................  19
 Reduced Initial Sales Charges.............................................  21
 Distribution Plans........................................................  23
 Limitations on the Payment of Deferred Sales Charges......................  24
Redemption of Shares.......................................................  25
 Deferred Sales Charges--Class B and Class C Shares........................  25
Portfolio Transactions.....................................................  25
Determination of Net Asset Value...........................................  27
Shareholder Services.......................................................  28
 Investment Account........................................................  28
 Automatic Investment Plans................................................  28
 Automatic Reinvestment of Dividends and Capital Gains Distributions.......  29
 Systematic Withdrawal Plans--Class A and
  Class D Shares...........................................................  29
 Exchange Privilege........................................................  30
Distributions and Taxes....................................................  32
 Tax Treatment of Option and Futures Transactions..........................  36
 Ohio Income Tax...........................................................  36
Performance Data...........................................................  37
General Information........................................................  39
 Description of Shares.....................................................  39
 Computation of Offering Price Per Share...................................  40
 Independent Auditors......................................................  41
 Custodian.................................................................  41
 Transfer Agent............................................................  41
 Legal Counsel.............................................................  41
 Report to Shareholders....................................................  41
 Additional Information....................................................  41
Appendix I--Economic and Financial Conditions in Ohio......................  42
Appendix II--Ratings of Municipal Bonds....................................  46
Independent Auditors' Report...............................................  53
Financial Statements.......................................................  54
</TABLE>    
                                                             
                                                          Code # 16155-1197     
 
[LOGO] MERRILL LYNCH 

Merrill Lynch 
Ohio Municipal Bond Fund

[ART]

STATEMENT OF 
ADDITIONAL
INFORMATION
    
November 14, 1997      

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 five-year period
      ended July 31, 1997 and for the period February 28, 1992
      (commencement of operations) to July 31, 1992.     
 
    Contained in Part B:
        
     Schedule of Investments as of July 31, 1997.     
        
     Statement of Assets and Liabilities as of July 31, 1997.     
        
     Statement of Operations for the year ended July 31, 1997.     
        
     Statements of Changes in Net Assets for each of the years in the two-
      year period ended July 31, 1997.     
        
     Financial Highlights for each of the years in the five-year period
      ended July 31, 1997.     
 
  (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 Ohio 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)  --Management Agreement between Registrant and Fund Asset Management,
          L.P.(a)
    (b)  --Supplement to Management Agreement between Registrant and Fund Asset
          Management, L.P.(e)
   6(a)  --Form of Revised Class A Shares Distribution Agreement between
          Registrant and Merrill Lynch Funds Distributor, Inc. (including Form
          of Selected Dealers Agreement).(e)
    (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).(e)
    (d)  --Form of Class D Shares Distribution Agreement between Registrant and
          Merrill Lynch Funds Distributor, Inc. (including Form of Selected
          Dealers Agreement).(e)
    (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     --Custody Agreement between Registrant and State Street Bank & Trust
          Company.(d)
   9     --Transfer Agency, Dividend Disbursing Agency and Shareholder
          Servicing Agency Agreement between Registrant and Merrill Lynch
          Financial Data Services, Inc.(f)
  10     --None.
  11     --Consent of Deloitte & Touche LLP, independent auditors for the
          Registrant.
</TABLE>    
 
                                      C-1
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER
 -------
 <C>     <S>
  12     --None.
  13     --Certificate of Fund Asset Management, Inc.(a)
  14     --None.
  15(a)  --Amended and Restated Class B Distribution Plan of the Registrant and
          Amended and Restated Class B Distribution Plan Sub-Agreement.(g)
    (b)  --Form of Class C Distribution Plan and Class C Distribution Plan Sub-
          Agreement of Registrant.(e)
    (c)  --Form of Class D Distribution Plan and Class D Distribution Plan Sub-
          Agreement of Registrant.(e)
  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 Pricing(SM) System Plan Pursuant to Rule 18f-
          3.(h)
</TABLE>    
- --------
   
(a) Filed on November 21, 1995 as an Exhibit to Post-Effective Amendment No. 5
    to the Registrant's Registration Statement on Form N-1A under the
    Securities Act of 1933, as amended (File No. 33-44500) (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.
    5 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. 5 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. 5 to the Registration Statement.
(c) Filed on November 8, 1993 as an Exhibit to Post-Effective Amendment No. 3
    to the Registration Statement.
(d) Incorporated by reference to Exhibit 8 to Post-Effective Amendment No. 3 to
    Registrant's Registration Statement on Form N-1A under the Securities Act
    of 1933, as amended, filed on October 14, 1994, relating to shares of
    Merrill Lynch Minnesota Municipal Bond Fund series of the Registrant (File
    No. 33-44734).
(e) Filed on October 19, 1994 as an Exhibit to Post-Effective Amendment No. 4
    to the Registration Statement.
(f) 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).
(g) Incorporated by reference to Exhibit 15(a) to Post-Effective Amendment No.
    4 to Registrant's Registration Statement on Form N-1A under the Securities
    Act of 1933, as amended, filed on October 26, 1995, relating to shares of
    Merrill Lynch Michigan Municipal Bond Fund series of the Registrant (File
    No. 33-55576).
(h) Incorporated by reference to Exhibit 18 to Post-Effective Amendment No. 13
    to the 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, 1997*
                        --------------                    -------------------
      <S>                                                 <C>
      Class A Shares of beneficial interest, par value
       $0.10 per share...................................          384
      Class B Shares of beneficial interest, par value
       $0.10 per share...................................        1,830
      Class C Shares of beneficial interest, par value
       $0.10 per share...................................           78
      Class D Shares of beneficial interest, par value
       $0.10 per share...................................           82
</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.
 
  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
 
                                      C-3
<PAGE>
 
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 registered 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
registered investment companies: Apex Municipal Fund, Inc., Corporate High
Yield Fund, Inc., Corporate High Yield Fund II, Inc., Debt Strategies Fund,
Inc., Income Opportunities Fund 1999, Inc., Income Opportunities Fund 2000,
Inc., Merrill Lynch Municipal Strategy Fund, Inc., MuniAssets Fund, Inc.,
MuniEnhanced Fund, Inc., MuniHoldings Fund, Inc., MuniHoldings California
Insured Fund, Inc., MuniHoldings Florida Insured Fund, MuniHoldings New York
Insured Fund, Inc., MuniInsured Fund, Inc., MuniVest Fund, Inc., MuniVest Fund
II, Inc., MuniVest Florida Fund, MuniVest Michigan Insured Fund, Inc., MuniVest
New Jersey 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 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 registered 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 Convertible 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 Intermediate
Government Bond 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 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., Merrill Lynch Variable Series Funds, Inc. and
Hotchkis and Wiley Funds (advised     
 
                                      C-4
<PAGE>
 
   
by Hotchkis and Wiley, a division of MLAM); and the following closed-end
registered investment companies: Merrill Lynch High Income Municipal Bond Fund,
Inc. and Merrill Lynch Senior Floating Rate Fund, Inc. MLAM also acts as sub-
adviser to Merrill Lynch World Strategy Portfolio and Merrill Lynch Basic Value
Equity Portfolio, two investment portfolios of EQ Advisory Trust.     
   
  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 Intermediate Government Bond
Fund is One Financial Center, 23rd 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, 1995 for his, her 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 28
and Messrs. Giordano, Harvey, 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; 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.
 Linda L. Federici.......    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 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
 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
</TABLE>    
 
                                      C-5
<PAGE>
 
<TABLE>   
<CAPTION>
                                                           OTHER SUBSTANTIAL BUSINESS,
           NAME           POSITION(S) WITH THE MANAGER PROFESSION, VOCATION OR EMPLOYMENT
           ----           ---------------------------- ----------------------------------
 <C>                      <C>                          <S>
 Ronald M. Kloss.........    Senior Vice President        Senior Vice President and
                              and Controller               Controller of MLAM; Senior
                                                           Vice President and
                                                           Controller of Princeton
                                                           Services
 Debra W. Landsman-          Senior Vice President        Senior Vice President of
  Yaros..................                                  MLAM; Vice President of
                                                           MLFD; Senior Vice President
                                                           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,          Senior Vice President        Senior Vice President of
  Jr. ...................                                  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;
                                                           Director of MLFD
 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
 Gregory Upah............    Senior Vice President        Senior Vice President of
                                                           MLAM; Senior Vice President
                                                           of Princeton Services
 Ronald L. Welburn.......    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., MuniAssets Fund, 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, 23rd Floor,
Boston, Massachusetts 02111-2665.     
<TABLE>   
<CAPTION>
                             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
Richard L. Reller........  Director                               None
Thomas Verage............  Director                               None
William E. Aldrich.......  Senior Vice President                  None
Robert W. Crook..........  Senior Vice President                  None
Michael J. Brady.........  Vice President                         None
William M. Breen.........  Vice President                         None
Michael G. Clark.........  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.
 
                                      C-6
<PAGE>
 
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, the 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 Post-Effective 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 14th day of
November, 1997.     
 
                                          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 Post-
Effective Amendment to its 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
       Gerald M. Richard*                and Accounting
                                         Officer)
                                                                        
                                                                         
- -------------------------------------
         (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                                       
*By: ________________________________                            November 14,
  (GERALD M. RICHARD, ATTORNEY-IN-                                1997     
                FACT)
 
                                      C-8
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER                             DESCRIPTION
 -------                            -----------
 <C>     <S>
  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> 001
   <NAME> MERRILL LYNCH OHIO MUNICIPAL BOND FUND FOR CLASS A SHARES
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1997
<PERIOD-START>                             AUG-01-1996
<PERIOD-END>                               JUL-31-1997
<INVESTMENTS-AT-COST>                         70406059
<INVESTMENTS-AT-VALUE>                        75981389
<RECEIVABLES>                                   951519
<ASSETS-OTHER>                                  110490
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                77043398
<PAYABLE-FOR-SECURITIES>                       1453227
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       290099
<TOTAL-LIABILITIES>                            1743326
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      70687023
<SHARES-COMMON-STOCK>                           761511
<SHARES-COMMON-PRIOR>                           680340
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (962281)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       5575330
<NET-ASSETS>                                   8505538
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              4468647
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (943875)
<NET-INVESTMENT-INCOME>                        3524772
<REALIZED-GAINS-CURRENT>                        803076
<APPREC-INCREASE-CURRENT>                      2393293
<NET-CHANGE-FROM-OPS>                          6721141
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (388948)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         281570
<NUMBER-OF-SHARES-REDEEMED>                   (217206)
<SHARES-REINVESTED>                              16807
<NET-CHANGE-IN-ASSETS>                       (2610931)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (1392366)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (372991)
<GROSS-ADVISORY-FEES>                           418770
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 943875
<AVERAGE-NET-ASSETS>                           7669658
<PER-SHARE-NAV-BEGIN>                            10.70
<PER-SHARE-NII>                                    .55
<PER-SHARE-GAIN-APPREC>                            .47
<PER-SHARE-DIVIDEND>                             (.55)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              11.17
<EXPENSE-RATIO>                                    .80
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 002
   <NAME> MERRILL LYNCH OHIO MUNICIPAL BOND FUND FOR CLASS B SHARES
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1997
<PERIOD-START>                             AUG-01-1996
<PERIOD-END>                               JUL-31-1997
<INVESTMENTS-AT-COST>                         70406059
<INVESTMENTS-AT-VALUE>                        75981389
<RECEIVABLES>                                   951519
<ASSETS-OTHER>                                  110490
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                77043398
<PAYABLE-FOR-SECURITIES>                       1453227
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       290099
<TOTAL-LIABILITIES>                            1743326
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      70687023
<SHARES-COMMON-STOCK>                          5378455
<SHARES-COMMON-PRIOR>                          6017388
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (962281)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       5575330
<NET-ASSETS>                                  60072484
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              4468647
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (943875)
<NET-INVESTMENT-INCOME>                        3524772
<REALIZED-GAINS-CURRENT>                        803076
<APPREC-INCREASE-CURRENT>                      2393293
<NET-CHANGE-FROM-OPS>                          6721141
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (2827393)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         764584 
<NUMBER-OF-SHARES-REDEEMED>                  (1546166)
<SHARES-REINVESTED>                             142649
<NET-CHANGE-IN-ASSETS>                       (2610931)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (1392366)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (372991)
<GROSS-ADVISORY-FEES>                           418770
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 943875
<AVERAGE-NET-ASSETS>                          62004174
<PER-SHARE-NAV-BEGIN>                            10.70
<PER-SHARE-NII>                                    .49
<PER-SHARE-GAIN-APPREC>                            .47
<PER-SHARE-DIVIDEND>                             (.49)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              11.17
<EXPENSE-RATIO>                                   1.31
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 003
   <NAME> MERRILL LYNCH OHIO MUNICIPAL BOND FUND FOR CLASS C SHARES
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1997
<PERIOD-START>                             AUG-01-1996
<PERIOD-END>                               JUL-31-1997
<INVESTMENTS-AT-COST>                         70406059
<INVESTMENTS-AT-VALUE>                        75981389
<RECEIVABLES>                                   951519
<ASSETS-OTHER>                                  110490
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                77043398
<PAYABLE-FOR-SECURITIES>                       1453227
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       290099
<TOTAL-LIABILITIES>                            1743326
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      70687023
<SHARES-COMMON-STOCK>                           215941
<SHARES-COMMON-PRIOR>                           254200
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (962281)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       5575330
<NET-ASSETS>                                   2411704
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              4468647
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (943875)
<NET-INVESTMENT-INCOME>                        3524772
<REALIZED-GAINS-CURRENT>                        803076
<APPREC-INCREASE-CURRENT>                      2393293
<NET-CHANGE-FROM-OPS>                          6721141
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (113014)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         102395
<NUMBER-OF-SHARES-REDEEMED>                   (147865)
<SHARES-REINVESTED>                               7211
<NET-CHANGE-IN-ASSETS>                       (2610931)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (1392366)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (372991)
<GROSS-ADVISORY-FEES>                           418770
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 943875
<AVERAGE-NET-ASSETS>                           2534944
<PER-SHARE-NAV-BEGIN>                            10.70
<PER-SHARE-NII>                                    .48
<PER-SHARE-GAIN-APPREC>                            .47
<PER-SHARE-DIVIDEND>                             (.48)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              11.17
<EXPENSE-RATIO>                                   1.41
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 004
   <NAME> MERRILL LYNCH OHIO MUNICIPAL BOND FUND FOR CLASS D SHARES
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          JUL-31-1997
<PERIOD-START>                             AUG-01-1996
<PERIOD-END>                               JUL-31-1997
<INVESTMENTS-AT-COST>                         70406059
<INVESTMENTS-AT-VALUE>                        75981389
<RECEIVABLES>                                   951519
<ASSETS-OTHER>                                  110490
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                77043398
<PAYABLE-FOR-SECURITIES>                       1453227
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       290099
<TOTAL-LIABILITIES>                            1743326
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      70687023
<SHARES-COMMON-STOCK>                           386088
<SHARES-COMMON-PRIOR>                           328390
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (962281)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       5575330
<NET-ASSETS>                                   4310346
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              4468647
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (943875)
<NET-INVESTMENT-INCOME>                        3524772
<REALIZED-GAINS-CURRENT>                        803076
<APPREC-INCREASE-CURRENT>                      2393293
<NET-CHANGE-FROM-OPS>                          6721141
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (195417)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          89091
<NUMBER-OF-SHARES-REDEEMED>                    (36222)
<SHARES-REINVESTED>                               4829
<NET-CHANGE-IN-ASSETS>                       (2610931)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (1392366)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                    (372991)
<GROSS-ADVISORY-FEES>                           418770
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 943875
<AVERAGE-NET-ASSETS>                           3931258
<PER-SHARE-NAV-BEGIN>                            10.70
<PER-SHARE-NII>                                    .54
<PER-SHARE-GAIN-APPREC>                            .46
<PER-SHARE-DIVIDEND>                             (.54)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              11.16
<EXPENSE-RATIO>                                    .90
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>

<PAGE>
 
                                                                   EXHIBIT 99.11


INDEPENDENT AUDITORS' CONSENT

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

We consent to the use in Post-Effective Amendment No. 7 to Registration 
Statement No. 33-44500 of our report dated September 5, 1997 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
Princeton, New Jersey
November 14, 1997


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission