MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
485BPOS, 1998-02-18
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<PAGE>   1
 
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 18, 1998
    
 
                                                                FILE NO. 33-8708
                                                               FILE NO. 811-4839
================================================================================
 
                       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. 14                      [X]
                                     AND/OR
        REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940      [X]
                                AMENDMENT NO. 15                             [X]
                        (CHECK APPROPRIATE BOX OR BOXES)
 
                            ------------------------
 
                MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
<TABLE>
<S>                                                    <C>
                   P.O. BOX 9011                                            08543-9011
               PRINCETON, NEW JERSEY                                        (ZIP CODE)
      (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
</TABLE>
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE (609) 282-2800
 
                                ROBERT W. CROOK
                MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
                                 P.O. BOX 9011
                        PRINCETON, NEW JERSEY 08543-9011
                    (NAME AND ADDRESS OF AGENT FOR SERVICE)
 
                            ------------------------
 
                                   COPIES TO:
 
<TABLE>
<S>                                                    <C>
              PHILIP L. KIRSTEIN, ESQ.                             LEONARD B. MACKEY, JR., ESQ.
            FUND ASSET MANAGEMENT, L.P.                                 ROGERS & WELLS LLP
                   P.O. BOX 9011                                         200 PARK AVENUE
          PRINCETON, NEW JERSEY 08543-9011                           NEW YORK, NEW YORK 10166
</TABLE>
 
                            ------------------------
 
 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX):
 
<TABLE>
<S>  <C>
[X]  immediately upon filing pursuant to paragraph (b)
[ ]  60 days after filing pursuant to paragraph (a)
[ ]  on (date) pursuant to paragraph (a)(i)
[ ]  75 days after filing pursuant to paragraph (a)(ii)
[ ]  on (date) pursuant to paragraph (a)(ii) of rule 485.
</TABLE>
 
                    IF APPROPRIATE, CHECK THE FOLLOWING BOX:
 
<TABLE>
<S>  <C>
[ ]  this post-effective amendment designates a new effective
     date for a previously filed post-effective amendment
</TABLE>
 
                        CALCULATION OF REGISTRATION FEE
 
     TITLE OF SECURITIES BEING REGISTERED CLASS A SHARES, CLASS B SHARES, CLASS
C SHARES AND CLASS D SHARES OF COMMON STOCK OF THE MERRILL LYNCH INTERMEDIATE
GOVERNMENT BOND FUND.
 
================================================================================
<PAGE>   2
 
                MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
 
                             CROSS REFERENCE SHEET
                                   FORM N-1A
 
<TABLE>
<CAPTION>
ITEM NO.                                                              LOCATION
- --------                                              -----------------------------------------
<C>        <S>                                        <C>
 PART A
    1.     Cover Page...............................  Cover Page
    2.     Synopsis.................................  Fee Table
    3.     Financial Highlights.....................  Financial Highlights; Performance Data
    4.     General Description of Registrant........  Investment Objectives and Policies;
                                                      Additional Information
    5.     Management of the Fund...................  Fee Table; Investment Adviser; Trustees;
                                                        Portfolio Transactions; Additional
                                                        Information
   5A.     Management's Discussion of Fund
             Performance............................  *
    6.     Capital Stock and Other Securities.......  Cover Page; Dividends, Distributions and
                                                        Taxes; Additional Information
    7.     Purchase of Securities Being Offered.....  Fee Table; Purchase of Shares; Merrill
                                                      Lynch Select Pricing(SM) System;
                                                        Additional Information
    8.     Redemption or Repurchase.................  Fee Table; Redemption of Shares; Merrill
                                                        Lynch Select Pricing(SM) System;
                                                        Shareholder Services
   *9.     Pending Legal Proceedings................  *
PART B
   10.     Cover Page...............................  Cover Page
   11.     Table of Contents........................  Table of Contents
   12.     General Information and History..........  Additional Information
   13.     Investment Objectives and Policies.......  Investment Objectives and Policies;
                                                      Investment Restrictions; Portfolio
                                                        Transactions
   14.     Management of the Fund...................  Management of the Fund
  *15.     Control Persons and Principal Holders of
             Securities.............................  *
   16.     Investment Advisory and Other Services...  Management of the Fund; Purchase of
                                                      Shares
   17.     Brokerage Allocation and Other
             Practices..............................  Portfolio Transactions
  *18.     Capital Stock and Other Securities.......  *
   19.     Purchase, Redemption and Pricing of
             Securities Being Offered...............  Purchase of Shares; Determination of Net
                                                        Asset Value; Redemption of Shares;
                                                        Systematic Withdrawal Plans; Retirement
                                                        Plans; Exchange Privilege; Additional
                                                        Information
   20.     Tax Status...............................  Dividends, Distributions and Taxes
   21.     Underwriters.............................  Purchase of Shares
   22.     Calculation of Performance Data..........  Performance Data
   23.     Financial Statements.....................  Financial Statements
PART C
</TABLE>
 
     Information required to be included in Part C is set forth under the
appropriate Item, so numbered, in Part C of this Registration Statement.
- ------------
 
* Item inapplicable or answer negative.
<PAGE>   3
 
PROSPECTUS
   
FEBRUARY 18, 1998
    
 
                MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
   P.O. BOX 9011, PRINCETON, NEW JERSEY 08543-9011 - PHONE NO. (609) 282-2800
                            ------------------------
 
     Merrill Lynch Intermediate Government Bond Fund (the "Fund") is a
diversified, open end investment
company seeking the highest possible current income consistent with the
protection of capital afforded by investing in intermediate-term debt securities
issued or guaranteed by the U.S. Government, its agencies or instrumentalities
with a maximum maturity not to exceed fifteen years. Under normal circumstances,
all or substantially all of the Fund's assets will be invested in such
securities. Under normal market conditions, the Fund will maintain a
dollar-weighted average maturity of six to eight years. There can be no
assurance that the Fund's investment objective will be realized. For more
information on the Fund's investment objective and policies, please see
"Investment Objectives and Policies" on page 10.
 
     Pursuant to the Merrill Lynch Select Pricing(SM) System, the Fund offers
four classes of shares, each with a different combination of sales charges,
ongoing fees and other features. Class C shares of the Fund are available only
through the Exchange Privilege. The Merrill Lynch Select Pricing(SM) System
permits an investor to choose the method of purchasing shares that the investor
believes is most beneficial given the amount of the purchase, the length of time
the investor expects to hold the shares and other relevant circumstances. See
"Merrill Lynch Select Pricing(SM) System" on page 3.
 
     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 other securities dealers which have entered into selected
dealer agreements with the Distributor including Merrill Lynch, Pierce, Fenner &
Smith Incorporated ("Merrill Lynch"). The minimum initial purchase for shares is
$1,000 and the minimum subsequent purchase is $50, except that for retirement
plans the minimum initial purchase is $100 and the minimum subsequent purchase
is $1, and 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 "Purchases of Shares" and "Redemption of Shares."
 
     A shareholder may have his shares redeemed at their net asset value per
share.
 
   
     Prior to February 18, 1997, the Fund operated as the Merrill Lynch
Institutional Intermediate Fund. At the close of business on February 14, 1997,
the Fund was reorganized as the Merrill Lynch Intermediate Government Bond Fund
and shares of the Fund outstanding on that date were reclassified as Class D
shares.
    
                            ------------------------
 
    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
     AND EXCHANGE COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------
 
   
     This Prospectus is a concise statement of information about the Fund that
is relevant to making an investment in the Fund. This Prospectus should be
retained for future reference. A statement containing additional information
about the Fund dated February 18, 1998 (the "Statement of Additional
Information") has been filed with the Securities and Exchange Commission (the
"Commission") and can be obtained without charge, by calling or writing the Fund
at the above 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 about the Fund. The
Statement of Additional Information is hereby incorporated.
    
                            ------------------------
 
              MERRILL LYNCH ASSET MANAGEMENT -- INVESTMENT ADVISER
              MERRILL LYNCH FUNDS DISTRIBUTOR, INC. -- DISTRIBUTOR
<PAGE>   4
 
                                   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(c)    CLASS D(d)
                                                               ----------    ----------    ----------    ----------
<S>                                                            <C>           <C>           <C>           <C>
SHAREHOLDER TRANSACTION EXPENSES:
  Maximum Sales Charge Imposed on Purchases (as a percentage
    of offering price)......................................      1.00%(e)       None          None         1.00%(e)
  Sales Charge Imposed on Dividend Reinvestments............       None          None          None          None
  Deferred Sales Charge (as a percentage of original
    purchase price or redemption proceeds, whichever is
    lower)..................................................       None(f)       1.0%(g)       1.0%(h)       None(f)
  Exchange Fee..............................................       None          None          None          None
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE
  NET ASSETS)(i):
  Investment Adviser Fees(j)................................      0.40%         0.40%         0.40%         0.40%
  12b-1 Fees(k):
    Account Maintenance Fees................................       None         0.25%         0.25%         0.10%
    Distribution Fees.......................................       None         0.25%         0.25%          None
  Other Expenses:
    Shareholder Servicing Fees(l)...........................      0.07%         0.10%         0.10%         0.07%
    Other Fees..............................................      1.12%         1.12%         1.12%         1.12%
                                                                  -----         -----         -----         -----
      Total Other Expenses..................................      1.19%         1.22%         1.22%         1.19%
                                                                  -----         -----         -----         -----
  Total Fund Operating Expenses(m)..........................      1.59%         2.12%         2.12%         1.69%
                                                                  =====         =====         =====         =====
</TABLE>
    
 
- ---------------
   
(a)  Class A shares are sold to a limited group of investors including existing
     Class A shareholders, certain retirement plans and certain participants in
     fee-based programs. See "Purchase of Shares -- Initial Sales Charge
     Alternatives -- Class A and Class D Shares" -- page 16 and "Shareholder
     Services -- Fee-Based Programs" -- page 31.
    
 
(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 18.
 
(c)  Class C shares are available only through the Exchange Privilege. See
     "Shareholder Services -- Exchange Privilege" -- page 32.
 
(d) The shares of the Fund in existence prior to its reorganization at the close
     of business on February 14, 1997 have been reclassified as Class D shares.
 
(e)  Reduced for purchases of $100,000 and over, and waived for purchases of
     Class A shares by certain retirement plans and participants in connection
     with certain fee-based programs. Class A or Class D purchases of $1,000,000
     or more may not be subject to an initial sales charge. See "Purchase of
     Shares -- Initial Sales Charge Alternatives -- Class A and Class D
     Shares" -- page 16.
 
   
(f)  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 0.20% of amounts 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 31.
    
 
   
(g)  Decreasing 1.0% thereafter to 0.0% after the first year. The CDSC may be
     modified in connection with certain fee-based programs. See "Shareholder
     Services -- Fee-Based Programs" -- page 31.
    
 
   
(h) Decreasing 1.0% thereafter to 0.0% after the first year. The CDSC may be
     waived in connection with certain fee-based programs. See "Shareholder
     Services -- Fee-Based Programs" -- page 31.
    
 
   
(i)  The Fund was reorganized at the close of business on February 14, 1997.
     Information for Class D shares is stated for the fiscal year ended October
     31, 1997. Information under "Other Expenses" for Class A, Class B and Class
     C shares is estimated for the fiscal year ending October 31, 1998.
    
 
(j)  See "Investment Adviser" -- page 11.
 
(k) See "Purchase of Shares -- Distribution Plans" -- page 22.
 
(l)  See "Investment Adviser -- Transfer Agency Services" -- page 13.
 
   
(m) For the fiscal year ended October 31, 1997, Merrill Lynch Asset Management,
     L.P. ("MLAM" or the "Manager") voluntarily waived its entire management fee
     and voluntarily reimbursed the Fund for a portion of other expenses
     (excluding Rule 12b-1 fees). Total Fund Operating Expenses in the Fee Table
     above have been restated to assume the absence of any such waiver of fees
     or reimbursement of expenses because the Manager may discontinue or reduce
     such waiver of fees or reimbursement of expenses at any time without
     notice. For the fiscal year ended October 31, 1997, the Manager waived
     management fees and reimbursed expenses totalling 0.96% for Class A shares,
     1.03% for Class B shares, 1.17% for Class C shares and 0.44% for Class D
     shares after which Total Fund Operating Expenses were 1.12% for Class A
     shares, 1.39% for Class B shares, 1.47% for Class C shares and 1.25% for
     Class D shares.
    
 
                                        2
<PAGE>   5
 
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 $10 initial sales charge
  (Class A and Class D shares only) assuming (i) the Total
  Fund Operating Expenses for each class set forth on page 2,
  (ii) a 5% annual return throughout the periods and (iii)
  redemption at the end of the period including any
  applicable CDSCs for Class B and Class C shares:
     Class A.................................................    $ 26       $60       $  96       $197
     Class B.................................................    $ 32       $66       $ 114       $245
     Class C*................................................    $ 32       $66       $ 114       $245
     Class D.................................................    $ 27       $63       $ 101       $208
An investor would pay the following expenses on the same
  $1,000 investment assuming no redemption at the end of the
  period:
     Class A.................................................    $ 26       $60       $  96       $197
     Class B.................................................    $ 22       $66       $ 114       $245
     Class C*................................................    $ 22       $66       $ 114       $245
     Class D.................................................    $ 27       $63       $ 101       $208
</TABLE>
 
- ---------------
* Class C shares are available only through the Exchange Privilege.
 
     The foregoing Fee Table is intended to assist investors in understanding
costs and expenses that a shareholder in the Fund will bear directly or
indirectly. The expenses set forth under "Other Expenses" are based on estimated
amounts through the end of the Fund's fiscal year on October 31, 1998. The
Example set forth above assumes the reinvestment of all dividends and
distributions and utilizes a five percent annual rate of return as mandated by
Securities and Exchange Commission regulations. THE EXAMPLE SHOULD NOT BE
CONSIDERED A REPRESENTATION OF PAST OR FUTURE EXPENSES OR ANNUAL RATES OF RETURN
AND ACTUAL EXPENSES OR ANNUAL RATES OF RETURN MAY BE MORE OR LESS THAN THOSE
ASSUMED FOR THE PURPOSE 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
charges permitted under the Rules of Fair Practice of the National Association
of Securities Dealers, Inc. ("NASD"). Merrill Lynch may charge its customers a
processing fee (presently $5.35) for confirming purchases and redemptions.
Purchases and redemptions effected directly through the Fund's transfer agent
are not subject to the processing fee. See "Purchase of Shares" and "Redemptions
of Shares."
 
                    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 are sold to investors choosing the deferred sales charge alternatives.
Class C shares are offered only through the Exchange Privilege and may not be
purchased except through exchange of Class C shares of certain other funds. The
Merrill Lynch Select
 
                                        3
<PAGE>   6
 
Pricing(SM) System is used by more than 50 registered investment companies
advised by Merrill Lynch Asset Management, L.P. ("MLAM" or the "Investment
Adviser") or its affiliate, Fund Asset Management, L.P. ("FAM"). 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, will be imposed directly against those classes and not against
all assets of the Fund and, accordingly, such charges will not affect the net
asset value of any other class or have any impact on investors choosing another
sales charge option. Dividends paid by the Fund for each class of shares will be
calculated in the same manner at the same time and will differ only to the
extent that account maintenance and distribution fees and any incremental
transfer agency costs relating to a particular class are borne exclusively by
that class. 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 or her particular circumstances. More
detailed information as to each class of shares is set forth under "Purchase of
Shares."
 
                                        4
<PAGE>   7
<TABLE>
<CAPTION>
===========================================================================================================
                                                       ACCOUNT
                                                     MAINTENANCE   DISTRIBUTION         CONVERSION
 CLASS                SALES CHARGE(1)                    FEE            FEE               FEATURE
 
<C>      <S>                                        <C>            <C>            <C>
   A      Maximum 1.00% initial sales                    No             No                  No
            charge(2),(3)
   B      CSDC for one year, at a rate of 1.0%          0.25%          0.25%        B shares convert to
            during the first year, decreasing 0.0%                                D shares automatically
            after the first year(4)                                                 after approximately
                                                                                       ten years(5)
   C(6)   CDSC for one year, at a rate of 1.0%          0.25%          0.25%                No
            during the first year, decreasing to
            0.0% after the first year(7)
   D      Maximum 1.00% initial sales charge(3)         0.10%           No                  No
===========================================================================================================
</TABLE>
 
- ---------------
(1) Initial sales charges are imposed at the time of purchase as a percentage of
    the offering price. Contingent deferred sales charges ("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 $100,000 or more and waived for purchases of Class
    A shares by certain retirement plans and 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 if the
    initial sales charge is waived, may be subject to a 0.20% CDSC if redeemed
    within one year. Such CDSC may be waived in connection with certain
    fee-based programs. A 0.30% sales charge for 401(k) purchases over
    $1,000,000 will apply. See "Class A" and "Class D" below.
(4) The CDSC may be modified in connection with certain fee-based programs.
(5) The conversion and holding periods for dividend reinvestment shares and
    certain retirement plans were 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) Class C shares are available only through the Exchange Privilege. See
    "Shareholder Services -- Exchange Privilege."
(7) 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 will be offered to a limited group of investors and also will be
         issued upon reinvestment of dividends on outstanding Class A shares.
         Investors who currently own Class A shares of the Fund in a shareholder
         account are entitled to purchase additional Class A shares of the Fund.
         Other eligible investors include certain retirement plans and
         participants in certain fee-based programs. In addition, Class A shares
         will be offered at net asset value to directors and employees of
         Merrill Lynch & Co., Inc. ("ML & Co.") and its subsidiaries (the term
         "subsidiaries," when used herein with respect to ML & Co., includes
         MLAM, FAM and certain other entities directly or indirectly
         wholly-owned and controlled by ML & Co.) and to members of the Boards
         of MLAM-advised mutual funds. The maximum initial sales charge of
         1.00%, reduced for purchases of $100,000 and over, and waived for
         purchases of Class A shares by certain retirement plans and
         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 CDSC of 0.20% 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
 
                                        5
<PAGE>   8
 
         account the investor's holdings of all classes of all MLAM-advised
         mutual funds. See "Purchase of Shares -- Initial Sales Charge
         Alternatives -- Class A and Class D Shares."
 
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 at the annual
         rate of 0.25% of the Fund's average daily net assets attributable to
         Class B shares, an ongoing distribution fee at the annual rate of 0.25%
         of average daily net assets attributable to Class B shares and a CDSC
         if they are redeemed within one year 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 an account
         maintenance fee but 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. 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 and the conversion
         and holding periods for certain retirement plans 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 at the annual
         rate of 0.25% of average daily net assets and an ongoing distribution
         fee of 0.25% of average daily net assets. Class C shares are also
         subject to a 1.0% CDSC if they are redeemed within one year of
         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, Class C shares have no conversion feature and, accordingly, an
         investor who purchases Class C shares will be subject to 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 C shares are available only through the
         Exchange Privilege.
 
Class D: The shares of the Fund in existence prior to its reorganization at the
         close of business on February 14, 1997 have been reclassified as Class
         D shares. Although purchasers of Class D shares generally will be
         subject to a 1.00% initial sales charge, those shareholders of the Fund
         who have held shares of the Fund since prior to its reorganization at
         the close of business on February 14, 1997 will not be subject to any
         sales charge with respect to either their reclassified Class D shares
         or any Class D shares that they may purchase in the future. In
         addition, while the Fund's shares prior to its reorganization at the
         close of business on February 14, 1997 were subject to a 0.15% annual
         distribution fee, the Class D shares are subject to a 0.10% annual
         account maintenance fee. Class D shares incur an initial sales charge
         when they are purchased and are subject to an ongoing account
         maintenance fee at the annual rate of 0.10% of average daily net
         assets. Class D shares are
 
                                        6
<PAGE>   9
 
         not subject to an ongoing distribution fee or any CDSC when they are
         redeemed. The maximum initial sales charge of 1.00% is reduced for
         purchases of $100,000 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 0.20% if the
         shares are redeemed within one year of purchase. Such CDSC may be
         waived in connection with certain fee-based programs. The schedule of
         initial sales charges and reductions for Class D shares is the same as
         the schedule for Class A shares, except that there is no waiver for
         purchases in connection with certain fee-based programs. Class D shares
         also will be issued upon conversion of Class B shares as described
         above under "Class B." See "Purchase of Shares -- Initial Sales Charge
         Alternatives -- Class A and Class D Shares."
 
     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 the his
or her 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 of the 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
deferred sales charges 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 who previously purchased Class A shares
may no longer be eligible to purchase Class A shares of other MLAM-advised
mutual funds, those previously purchased Class A shares, together with Class B,
Class C and Class D share holdings, will count toward a right of accumulation
which may qualify the investor for reduced initial sales charges on new initial
sales charge purchases. In addition, the ongoing Class B and Class C account
maintenance and distribution fees will cause Class B and Class C shares to have
higher expense ratios, pay lower dividends and have lower total returns than the
initial sales charge shares. The ongoing Class D account maintenance fees will
cause Class D shares to have a higher expense ratio, pay lower dividends and
have a lower total return than Class A shares.
 
     Deferred Sales Charge Alternatives. Because no initial sales charges are
deducted at the time of purchase, Class B and Class C shares provide the benefit
of putting all of the investor's dollars to work from the time the investment is
made. The deferred sales charge alternatives may be particularly appealing to
investors who do not qualify for a reduction in initial sales charges. Both
Class B and Class C shares are subject to ongoing account maintenance fees and
distribution fees; however, the ongoing account maintenance and distribution
fees potentially may be offset to the extent any return is realized on the
additional funds initially invested in Class B or Class C shares. In addition,
Class B shares will be converted into Class D shares of the Fund after a
conversion period of approximately ten years, and thereafter investors will be
subject to lower ongoing fees. Class C shares are available only through the
Exchange Privilege.
 
     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
 
                                        7
<PAGE>   10
 
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 one
year CDSC period, they 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."
 
                                        8
<PAGE>   11
 
                              FINANCIAL HIGHLIGHTS
 
    The financial information in the table below has been audited in conjunction
with the annual audits of the financial statements of the Fund by Deloitte &
Touche LLP, independent auditors. Financial Statements for the fiscal year ended
October 31, 1997 and the independent auditors' report thereon are included in
the Statement of Additional Information. The shares of the Fund in existence
prior to the close of business on February 14, 1997 were reclassified as Class D
shares. In connection with its reorganization at the close of business on
February 14, 1997, the Fund changed its investment objective from investing only
in assets which would permit shares of the Fund to qualify both as "liquid
assets" under the regulations of the Office of Thrift Supervision and as an
investment permitted by the regulations of the National Credit Union Association
to seeking the highest possible current income consistent with the protection of
capital afforded by investing in intermediate-term debt securities issued or
guaranteed by the U.S. Government, its agencies or instrumentalities with a
maximum maturity not to exceed fifteen years and, under normal market
conditions, a dollar-weighted average maturity of six to eight years. For the
period from the commencement of the Fund's operations through its reorganization
at the close of business on February 14, 1997, the portfolio of the Fund has
consisted primarily of securities issued by the U.S. Government and its agencies
and instrumentalities. The average maturity of the Fund's portfolio during this
period (generally ranging from two to five years) has been somewhat shorter than
the average maturity of the Fund of six to eight years following the change in
its investment objective upon its reorganization. As a result, the financial
information in the table below for operations of the Fund prior to its
reorganization may not be indicative of its performance following its
reorganization. Further information about the Fund's performance is contained in
the Fund's Annual Report, which can be obtained, without charge, upon request.
 
    The per share data and ratios set forth below have been derived from
information provided in the Fund's audited financial statements. The Fund issued
one class of shares prior to its reorganization on February 14, 1997. Shares of
the Fund in existence at the close of business on that date have been
reclassified as Class D shares. The Fund offers four classes of shares,
including Class A shares, Class B shares, Class C shares and Class D shares.
   
<TABLE>
<CAPTION>
                                                                           FOR THE
                                                                             YEAR
                                                                            ENDED
                                           FOR THE PERIOD FEBRUARY 18,     OCT. 31,
                                              1997+ TO OCT. 31, 1997         1997
                                          ------------------------------   --------
                                          CLASS A    CLASS B    CLASS C    CLASS D
                                          --------   --------   --------   --------
<S>                                       <C>        <C>        <C>        <C>
Increase (Decrease) in Net Asset Value:
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period....  $  9.66    $  9.66    $  9.66    $  9.68
                                          -------    -------    -------    -------
 Investment income -- net...............      .39        .37        .36        .55
 Realized and unrealized gain (loss) on
   investments -- net...................      .08        .08        .07        .06
                                          -------    -------    -------    -------
 Total from investment operations.......      .47        .45        .43        .61
                                          -------    -------    -------    -------
 Less dividends from investment
   income -- net........................     (.39)      (.37)      (.36)      (.55)
                                          -------    -------    -------    -------
Net asset value, end of period..........  $  9.74    $  9.74    $  9.73    $  9.74
                                          =======    =======    =======    =======
TOTAL INVESTMENT RETURN:**
Based on net asset value per share......     5.04% #    4.81% #    4.57% #    6.60%
                                          =======    =======    =======    =======
RATIOS TO AVERAGE NET ASSETS:
Expenses, net of reimbursement..........     1.12% *    1.39% *    1.47% *    1.25%
                                          =======    =======    =======    =======
Expenses................................     2.08% *    2.42% *    2.64% *    1.69%
                                          =======    =======    =======    =======
Investment income -- net................     5.95% *    5.69% *    5.55% *    5.71%
                                          =======    =======    =======    =======
SUPPLEMENTAL DATA:
Net assets, end of period (in
 thousands).............................  $   425    $   829    $    47    $28,805
                                          =======    =======    =======    =======
Portfolio turnover......................   201.55%    201.55%    201.55%    201.55%
                                          =======    =======    =======    =======
 
<CAPTION>
 
                                                     FOR THE YEAR ENDED OCTOBER 31,
                                          -----------------------------------------------------
                                            1996       1995      1994       1993        1992
                                          --------   --------   -------   ---------   ---------
<S>                                       <C>         <C>         <C>      <C>         <C>
Increase (Decrease) in Net Asset Value:
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period....  $   9.82   $   9.60   $ 10.31   $   10.06   $    9.76
                                           -------    -------   -------    --------     -------
 Investment income -- net...............       .61        .62       .55         .54         .62
 Realized and unrealized gain (loss) on
   investments -- net...................      (.14)       .22      (.71)        .25         .30
                                           -------    -------   -------    --------     -------
 Total from investment operations.......       .47        .84      (.16)        .79         .92
                                           -------    -------   -------    --------     -------
 Less dividends from investment
   income -- net........................      (.61)      (.62)     (.55)       (.54)       (.62)
                                           -------    -------   -------    --------     -------
Net asset value, end of period..........  $   9.68   $   9.82   $  9.60   $   10.31   $   10.06
                                           =======    =======   =======    ========     =======
TOTAL INVESTMENT RETURN:**
Based on net asset value per share......      4.87%      9.00%    (1.54)%      8.07%       9.66%
                                           =======    =======   =======    ========     =======
RATIOS TO AVERAGE NET ASSETS:
Expenses, net of reimbursement..........       .97%       .96%      .83%        .80%        .82%
                                           =======    =======   =======    ========     =======
Expenses................................       .97%       .96%      .83%        .80%        .82%
                                           =======    =======   =======    ========     =======
Investment income -- net................      6.19%      6.38%     5.55%       5.34%       6.24%
                                           =======    =======   =======    ========     =======
SUPPLEMENTAL DATA:
Net assets, end of period (in
 thousands).............................  $ 47,281   $ 65,139   $81,407   $ 122,283   $  94,798
                                           =======    =======   =======    ========     =======
Portfolio turnover......................     51.44%     47.90%   172.51%     204.80%     156.12%
                                           =======    =======   =======    ========     =======
 
<CAPTION>
 
                                            1991        1990        1989        1988
                                          ---------   ---------   ---------   ---------
<S>                                       <C>         <C>         <C>         <C>
Increase (Decrease) in Net Asset Value:
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period....  $    9.35   $    9.42   $    9.44   $    9.57
                                           --------    --------    --------    --------
 Investment income -- net...............        .72         .77         .83         .80
 Realized and unrealized gain (loss) on
   investments -- net...................        .41        (.07)       (.02)       (.13)
                                           --------    --------    --------    --------
 Total from investment operations.......       1.13         .70         .81         .67
                                           --------    --------    --------    --------
 Less dividends from investment
   income -- net........................       (.72)       (.77)       (.83)       (.80)
                                           --------    --------    --------    --------
Net asset value, end of period..........  $    9.76   $    9.35   $    9.42   $    9.44
                                           ========    ========    ========    ========
TOTAL INVESTMENT RETURN:**
Based on net asset value per share......      12.62%       7.75%       9.12%       7.29%
                                           ========    ========    ========    ========
RATIOS TO AVERAGE NET ASSETS:
Expenses, net of reimbursement..........        .81%        .75%        .70%        .65%
                                           ========    ========    ========    ========
Expenses................................        .81%        .75%        .70%        .65%
                                           ========    ========    ========    ========
Investment income -- net................       7.66%       8.24%       8.96%       8.36%
                                           ========    ========    ========    ========
SUPPLEMENTAL DATA:
Net assets, end of period (in
 thousands).............................  $ 125,888   $ 151,891   $ 211,528   $ 303,530
                                           ========    ========    ========    ========
Portfolio turnover......................     202.11%      68.74%     306.69%     262.56%
                                           ========    ========    ========    ========
</TABLE>
    
 
- ---------------
 * Annualized.
** Total investment returns exclude the effects of sales loads.
 + Commencement of operations.
 # Aggregate total investment return.
 
                                        9
<PAGE>   12
 
                       INVESTMENT OBJECTIVES AND POLICIES
 
     The Fund is a diversified, open-end management investment company. The
Fund's investment objective is to seek the highest possible current income
consistent with the protection of capital afforded by investing in
intermediate-term debt securities issued or guaranteed by the U.S. Government,
its agencies or instrumentalities with a maximum maturity not to exceed fifteen
years. Under normal circumstances, all or substantially all of the Fund's assets
will be invested in such securities. Under normal market conditions, the Fund
will maintain a dollar-weighted average maturity of six to eight years.
 
     Certain of the securities in which the Fund invests are supported by the
full faith and credit of the U.S. Government, such as U.S. Treasury obligations.
Other of the securities in which the Fund invests are not supported by the full
faith and credit of the U.S. Government but are issued by U.S. Government
agencies, instrumentalities or government-sponsored enterprises. Such securities
are generally supported only by the credit of the agency, instrumentality or
enterprise issuing the security and are generally considered to have a low
principal risk. However, because of the longer-term maturities of the securities
in which the Fund will invest, interest rate fluctuations may adversely affect
the market value of such securities. As interest rates rise, the value of
fixed-income securities will fall, adversely affecting the net asset value of
the Fund.
 
INVESTMENT RESTRICTIONS
 
     The Fund has adopted a number of restrictions and policies relating to the
investment of its assets and its activities which are fundamental policies and
may not be changed without the approval of the holders of a majority of the
Fund's outstanding voting securities. Investors are referred to the Statement of
Additional Information for a complete description of such restrictions and
policies.
 
OTHER PORTFOLIO STRATEGIES
 
     Indexed and Inverse Securities. The Fund may invest in securities whose
potential return is based on the change in particular measurements of value or
an interest rate (an "index"). As an illustration, the Fund may invest in a
security that pays interest and returns of principal based on the change in an
index of interest rates or on the value of a precious or industrial metal.
Interest and principal payable on a security may also be based on relative
changes among particular indices. In addition, the Fund may invest in securities
whose potential investment return is inversely based on the change in particular
indices. For example, the Fund may invest in securities that pay a higher rate
of interest and principal when a particular index decreases and pay a lower rate
of interest and principal when the value of the index increases. To the extent
that the Fund invests in such types of securities, it will be subject to the
risks associated with changes in the particular indices, which may include
reduced or eliminated interest payments and losses of invested principal.
 
     Certain indexed securities, including certain inverse securities, may have
the effect of providing a degree of investment leverage, because they may
increase or decrease in value at a rate that is a multiple of the changes in
applicable indices. As a result, the market value of such securities will
generally be more volatile than the market values of fixed-rate securities. The
Fund believes that indexed securities, including inverse securities, represent
flexible portfolio management instruments that may allow the Fund to seek
potential investment rewards, hedge other portfolio positions, or vary the
degree of portfolio leverage relatively efficiently under different market
conditions.
 
                                       10
<PAGE>   13
 
     Lending of Portfolio Securities. The Fund may from time to time lend
securities from its portfolio to brokers, dealers and financial institutions and
receive collateral in cash or securities issued or guaranteed by the U.S.
Government which, while the loan is outstanding, will be maintained at all times
in an amount equal to at least 100% of the current market value of the loaned
securities plus accrued interest. Such cash collateral will be invested in
short-term securities, the income from which will increase the return to the
Fund.
 
     Forward Commitments. The Fund may purchase securities on a when-issued
basis or forward commitment basis and may purchase or sell such securities for
delayed delivery. These transactions occur when securities are purchased or sold
by the Fund with payment and delivery taking place in the future to secure what
is considered an advantageous yield and price to the Fund at the time of
entering into the transaction. The value of the security on the delivery date
may be more or less than its purchase price. The Fund will establish a
segregated account in connection with such transactions in which the Fund will
deposit liquid securities with a value at least equal to the Fund's exposure, on
a mark-to-market basis, to the transaction (as calculated pursuant to
requirements of the Securities and Exchange Commission). Such segregation will
ensure that the Fund has assets available to satisfy its obligations with
respect to the transaction, but will not limit the Fund's exposure to loss.
 
     Repurchase Agreements. The Fund may invest in repurchase agreements.
Repurchase agreements may be entered into only with a member bank of the Federal
Reserve System or 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 for the Fund insulated from market
fluctuations during such period. In the event of default by the seller under a
repurchase agreement, a Fund will continue to hold the seller's securities as
collateral but may suffer time delays and incur costs or possible losses in
connection with such transactions.
 
                               INVESTMENT ADVISER
 
     The Investment Adviser to the Fund is MLAM, an indirect wholly owned
subsidiary of Merrill Lynch & Co., Inc. The principal address of the Investment
Adviser is 800 Scudders Mill Road, Plainsboro, New Jersey 08536 (mailing
address: P.O. Box 9011, Princeton, New Jersey 08543-9011). The Investment
Adviser or its affiliate, Fund Asset Management, L.P. ("FAM"), acts as the
investment adviser for more than 140 registered investment companies. The
Investment Adviser also offers portfolio management and portfolio analysis
services to individual and institutional accounts. As of December 31, 1997, the
Investment Adviser and FAM had a total of $278.7 billion in investment company
and other portfolios assets under management, including accounts of certain
affiliates of the Investment Adviser.
 
     The Investment Adviser has entered into a sub-advisory agreement (the
"Sub-Advisory Agreement") with MLAM U.K., an indirect, wholly owned subsidiary
of ML & Co. and an affiliate of the Investment Adviser, pursuant to which the
Investment Adviser pays MLAM U.K. a fee for providing investment advisory
services to the Investment Adviser with respect to the Fund in an amount to be
determined from time to time by the Investment Adviser and MLAM U.K., but in no
event in excess of the amount that the Investment Adviser actually receives for
providing services to the Fund pursuant to the Investment Advisory Agreement.
 
                                       11
<PAGE>   14
 
     MLAM, subject to the general supervision of the Board of Trustees of the
Fund, renders investment advice and is responsible for the overall management of
the Fund's business affairs. The responsibility for making decisions to buy,
sell or hold a particular security rests with MLAM.
 
     The Fund pays the Investment Adviser a monthly fee at the annual rate of
0.40% of the average daily net assets of the Fund. In addition, the Investment
Advisory Agreement obligates the Fund to pay certain expenses incurred in its
operations including, among other things, the investment advisory fee, legal and
audit fees, registration fees, unaffiliated trustees' fees and expenses,
custodian and transfer agency fees, accounting costs, the costs of issuing and
redeeming shares and certain of the costs of printing proxies, shareholder
reports, prospectuses and statements of additional information.
 
     The Investment Adviser has agreed that, in the event the operating expenses
of the Fund (including the fees payable to the Investment Adviser but excluding
taxes, interest, brokerage and extraordinary expenses) for any fiscal year
exceed the expense limitations applicable to the Fund imposed by state
securities laws or any published regulations thereunder, it will reduce its fee
by the extent of such excess and, if required pursuant to any such laws or
regulations, will annually reimburse the Fund in the amount of such excess.
 
     MLAM received $152,873 (based on average daily net assets of approximately
$38.3 million) in investment advisory fees from the Fund during the Fund's
fiscal year ended October 31, 1997. For the same period, the ratio of total
expenses to average net assets was 2.08% for Class A shares, 2.42% for Class B
shares, 2.64% for Class C shares and 1.69% for Class D shares. Accounting
services are provided to the Fund by MLAM, and the Fund reimburses MLAM for its
costs in connection with such services. For the fiscal year ended October 31,
1997, the amount of such reimbursement was $14,972.
 
     Ralph A. DeCesare serves as the Portfolio Manager for the Fund and is
primarily responsible for the day-to-day management of the Fund. Mr. DeCesare
has served as Vice President of MLAM since 1993.
 
CODE OF ETHICS
 
     The Board of Trustees of the Fund has adopted a Code of Ethics under Rule
17j-1 of the Investment Company Act of 1940 (the "Investment Company Act") which
incorporates the Code of Ethics of the Investment Adviser (together, the
"Codes"). The Codes significantly restrict the personal investing activities of
all employees of the Investment Adviser and, as described below, impose
additional, more onerous, restrictions on fund investment personnel.
 
     The Codes require that all employees of the Investment Adviser 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
Investment Adviser 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 Investment Adviser. 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).
 
                                       12
<PAGE>   15
 
TRANSFER AGENCY SERVICES
 
     The Transfer Agent, which is a subsidiary of ML & Co., acts as the Fund'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 of
the Fund and up to $14.00 per Class B or Class C account of the Fund, 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 the relevant share class on a recordkeeping system, provided the
recordkeeping system is maintained by a subsidiary of ML & Co. For the fiscal
year ended October 31, 1997, the total fee paid by the Fund to the Transfer
Agent was $25,060, pursuant to its current and previous transfer agency and
service agreement with State Street Bank and Trust Company.
 
                                    TRUSTEES
 
     The Trustees of the Fund consist of seven individuals, five of whom are not
"interested persons" of the Fund as defined in the Investment Company Act. The
Trustees of the Fund are responsible for the overall supervision of the
operations of the Fund and perform the various duties imposed on the directors
of investment companies by the Investment Company Act. The Board of Trustees
elects officers of the Fund annually.
 
     The Trustees of the Fund and their principal employment are as follows:
 
     ROBERT W. CROOK* -- Senior Vice President of the Investment Adviser and of
the Distributor.
 
     A. BRUCE BRACKENRIDGE -- Retired Group Executive of J.P. Morgan & Co., Inc.
and Morgan Guaranty Trust Company.
 
     CHARLES C. CABOT, JR. -- Partner in the law firm of Sullivan & Worcester.
 
     JAMES T. FLYNN -- Retired Chief Financial Officer of J.P. Morgan & Co.,
Inc.
 
     TERRY K. GLENN* -- Executive Vice President of the Investment Adviser and
FAM and President and Director of the Distributor.
 
     GEORGE W. HOLBROOK, JR. -- Managing Partner of Bradley Resources Company.
 
     W. CARL KESTER -- Professor, Business Administration, Harvard University
Graduate School of Business Administration.
- ---------------
 
* Interested person, as defined in the Investment Company Act of 1940, of the
Fund.
 
                                       13
<PAGE>   16
 
                               PURCHASE OF SHARES
 
     The Fund continuously offers its shares in four classes at a public
offering price equal to the net asset value plus varying sales charges as set
forth below. Merrill Lynch Funds Distributor, Inc. (the "Distributor"), an
affiliate of both the Investment Adviser and Merrill Lynch, acts as the
distributor of the shares. Class C shares of the Fund are offered only through
the Exchange Privilege. See "Deferred Sales Charge Alternatives -- Class B and
Class C Shares" below.
 
     Shares may be purchased directly from the Distributor or from other
securities dealers, including Merrill Lynch, with whom the Distributor has
entered into selected dealer agreements. The minimum initial purchase is $1,000
and the minimum subsequent purchase is $50, except that for retirement plans,
the minimum initial purchase is $100 and the minimum subsequent purchases
requirement is $1, and 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 (currently $5.35) to
confirm a sale of shares to such customers. Purchases made directly through the
Transfer Agent are not subject to the processing fee.
 
     As to purchase orders received by securities dealers prior to the close of
the New York Stock Exchange (the "NYSE") (generally 4:00 p.m., New York City
time) on the day the order is placed with the Distributor, including orders
received after the close 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
the NYSE on the day the order is placed with the Distributor, provided the order
is received by the Distributor not later than 30 minutes after the close of
business on the NYSE (generally 4:00 p.m., New York City time), on that day. If
the purchase orders are not received by the Distributor as of 30 minutes after
the close of business on the NYSE, such orders will be deemed received on the
next business day. Any order may be rejected by the Distributor or the Fund.
Neither the Distributor nor securities dealers are permitted to withhold placing
orders to benefit themselves by a price change. The Fund reserves the right to
suspend the sale of its shares to the public in response to conditions in the
securities markets, or otherwise. Any order may be rejected by the Distributor
or the Fund.
 
     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. Class A and Class D shares are sold to investors
choosing the initial sales charge alternative and Class B and Class C shares are
sold to investors choosing the deferred sales charge alternative. Class C shares
are available only through the Exchange Privilege and may not be purchased
except through exchange of Class C shares of another MLAM-advised mutual fund.
 
     The alternative sales arrangements of the Fund permit investors in the Fund
to choose the method of purchasing shares that they believe is most beneficial
given the amount of their purchase, the length of time the investor expects to
hold their shares and other relevant circumstances. Investors should determine
whether under their particular circumstances it is more advantageous to incur an
initial sales charge, as discussed below, or to have the entire initial purchase
price invested in the Fund with the investment thereafter being subject to
ongoing account maintenance and distribution fees. A discussion of the factors
that investors should consider in determining the method of purchasing shares
under the Merrill Lynch Select Pricing(SM) System is set forth under "Merrill
Lynch Select Pricing(SM) System" on page 3.
 
                                       14
<PAGE>   17
 
     Each Class A, Class B, Class C and Class D share of the Fund represents
identical interests in the Fund and has the same rights, except that Class B,
Class C and Class D shares bear the expenses of the ongoing account maintenance
fees, and Class B and Class C shares bear the expenses of the ongoing
distribution fees and the additional incremental transfer agency costs resulting
from the deferred sales charge arrangements. The deferred sales charges and
account maintenance fees that are imposed on Class B and Class C shares, as well
as the account maintenance fees that are imposed on Class D shares, will be
imposed directly against those classes and not against all assets of the Fund
and, accordingly, such charges will not affect the net asset value of any other
class or have any impact on investors choosing another sales charge option.
Dividends paid by the Fund for each class of shares will be calculated in the
same manner at the same time and will differ only to the extent that account
maintenance and distribution fees and any incremental transfer agency costs
relating to a particular class are borne exclusively by that class. Class B,
Class C and Class D shares of the Fund 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 CDSC 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 tables set forth a summary of the distribution arrangements
for each class of shares under the Merrill Lynch Select Pricing(SM) System.
 
<TABLE>
    ==========================================================================================================
                                                ACCOUNT
                                              MAINTENANCE   DISTRIBUTION
    CLASS     SALES CHARGE(1)                     FEE           FEE        CONVERSION FEATURE
    ----------------------------------------------------------------------------------------------------------
    <C>    <S>                             <C>              <C>           <C>
      A     Maximum 1.00% initial sales           No             No        No
              charge(2),(3)
    ----------------------------------------------------------------------------------------------------------
      B     CDSC for one year, at a rate of      0.25%         0.25%
              1.0% during the first year,
              decreasing to 0.0% after the                                 B shares convert to
              first year(4)                                                D shares automatically
                                                                           after approximately
                                                                           ten years(5)
    ----------------------------------------------------------------------------------------------------------
    C(6)    CDSC for one year, at a rate of      0.25%         0.25%       No
              1.0% during the first year,
              decreasing to 0.0% after the
              first year(7)
    ----------------------------------------------------------------------------------------------------------
      D     Maximum 1.00% initial sales          0.10%           No        No
              charge(3)
    ==========================================================================================================
</TABLE>
 
                                                    (see footnotes on next page)
 
                                       15
<PAGE>   18
 
(1) Initial sales charges are imposed at the time of purchase as a percentage of
    the offering price. CDSCs may be 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 $100,000 or more and waived for purchases of Class
    A shares by certain retirement plans and 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 if the
    initial sales charge is waived, may be subject to a 0.20% CDSC if redeemed
    within one year. Such CDSC may be waived in connection with certain
    fee-based programs. A 0.30% sales charge for 401(k) purchases over
    $1,000,000 will apply. See "Initial Sales Charge Alternatives -- Class A and
    Class D Shares."
 
(4) The CDSC may be modified in connection with certain fee-based programs.
 
(5) The conversion and holding periods for dividend reinvestment shares and
    certain retirement plans were 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) Class C shares are available only through the Exchange Privilege. See
    "Shareholder Services -- Exchange Privilege."
 
(7) The CDSC may be waived in connection with certain fee-based programs.
 
INITIAL SALES CHARGE ALTERNATIVES -- CLASS A AND CLASS D SHARES
 
     Investors choosing the initial sales charge alternatives who are eligible
to purchase Class A shares should purchase Class A shares rather than Class D
shares because there is an account maintenance fee imposed on Class D shares.
Sales charges for purchases of Class A and Class D shares of the Fund, computed
as indicated below, are reduced on larger purchases. The Distributor may reallow
discounts to selected securities 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 within the meaning of the Securities Act of 1933. 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. The Distributor will retain the
entire sales charge on orders placed directly with it. The sales charges
applicable to purchases of Class A and Class D shares, expressed as a percentage
of the gross public offering price and the net amount invested, and expected
dealer discounts, expressed as a percentage of the gross public offering price,
are as follows:
 
<TABLE>
<CAPTION>
                                            SALES LOAD AS A      SALES LOAD AS A        DISCOUNT TO SELECT
                                             PERCENTAGE OF      PERCENTAGE OF NET     DEALERS AS A PERCENTAGE
            AMOUNT OF PURCHASE              OFFERING PRICE      AMOUNT INVESTED*         OF OFFERING PRICE
- ------------------------------------------  ---------------     -----------------     -----------------------
<S>                                         <C>                 <C>                   <C>
Less than $100,000........................        1.00%                1.01%                    0.95%
$100,000 but less than $250,000...........        0.75                 0.76                     0.70
$250,000 but less than $500,000...........        0.50                 0.50                     0.45
$500,000 but less than $1,000,000.........        0.30                 0.30                     0.27
$1,000,000 or more**......................        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 certain fee-based plan
   investors and 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 CDSC of 0.20% 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. A sales charge of 0.30% will be imposed on purchases
   of $1 million or more of Class A or Class D shares by certain 401(k) plans.
 
                                       16
<PAGE>   19
 
   
     For the period February 18, 1997 (commencement of operations) to October
31, 1997, the Fund sold 49,642 Class A shares for aggregate net proceeds of
$467,013. There were no gross sales charges for the sale of Class A shares. For
the period February 18, 1997 (commencement of operations) to October 31, 1997,
the Distributor received no CDSC proceeds with respect to redemption within one
year after purchase of Class A shares purchased subject to an initial sales
charge waiver.
    
 
   
     For the fiscal year ended October 31, 1997, the Fund sold 564,311 Class D
shares (including shares of the Fund that were reclassified as Class D shares in
connection with the reorganization on February 14, 1997) for aggregate net
proceeds of $5,452,644. The gross sales charges for the sale of Class D shares
were $2,738, of which $277 was received by the Distributor and $2,461 was
received by Merrill Lynch. For the year ended October 31, 1997, the Distributor
received no CDSC proceeds with respect to redemption within one year after
purchase of Class D shares (including shares of the Fund that were reclassified
as Class D shares in connection with the reorganization on February 14, 1997)
purchased subject to an initial sales charge waiver.
    
 
   
     Eligible Class A Investors. Class A shares are offered to a limited group
of investors and also will be issued upon reinvestment of dividends from
outstanding Class A shares. Investors that currently own Class A shares in a
shareholder account, including participants in the Merrill Lynch Blueprint(SM)
Program, are entitled to purchase additional Class A shares of the Fund in that
account. Certain employer sponsored retirement or savings plans, including
eligible 401(k) plans, may purchase Class A shares of the Fund at net asset
value provided such plans meet the required minimum number of eligible employees
or required amount of assets advised by MLAM or any of its affiliates. Class A
shares are available at net asset value to corporate warranty insurance reserve
fund programs provided that the program has $3 million or more initially
invested in MLAM-advised mutual funds. Also eligible to purchase Class A shares
at net asset value are participants in certain investment programs including
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 will be 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
Fund. 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 or Class D shares of the Fund if certain conditions set
forth in the Statement of Additional Information are met. For example, 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."
 
     The shares of the Fund in existence prior to its reorganization at the
close of business on February 14, 1997 have been reclassified as Class D shares.
Although purchasers of Class D shares generally will be subject
 
                                       17
<PAGE>   20
 
to a 1.00% front-end sales load, those shareholders of the Fund who have held
shares of the Fund since prior to its reorganization at the close of business on
February 14, 1997 will not be subject to any sales load with respect to either
their reclassified Class D shares or any Class D shares that they may purchase
in the future.
 
     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. Subject to certain conditions Class A
and Class D shares of the Fund are offered at net asset value to shareholders of
Merrill Lynch Municipal Strategy Fund, Inc. and Merrill Lynch High Income
Municipal Bond Fund, Inc., and Class A shares are offered at net asset value to
shareholders of Senior Floating Rate Fund, Inc. who wish to reinvest in shares
of the Fund the net proceeds from a sale of certain of their shares of common
stock, pursuant to tender offers conducted by those funds.
 
     Class D shares are offered at net asset value, without sales charge, to an
investor who has a business relationship with a Merrill Lynch Financial
Consultant, if certain conditions set forth in the Statement of Additional
Information are met. Class D shares may be offered at net asset value in
connection with the acquisition of assets of other investment companies.
 
     Class D shares are offered with reduced sales charges and, in certain
circumstances, at net asset value, to participants in the Merrill Lynch
Blueprint(SM) Program.
 
     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. Class C shares,
however, are available only through the Exchange Privilege.
 
     The public offering price of Class B and Class C shares for investors
choosing the deferred sales charge alternatives is the next determined net asset
value per share without the imposition of a sales charge at the time of
purchase. As discussed below, Class B and Class C shares are subject to a one
year CDSC. 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 and thereafter
will be subject to lower continuing fees. Class C shares are available only
through the Exchange Privilege. 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 at an annual rate of 0.25% of average daily net assets and
distribution fees of 0.25% of average daily net assets. See "Distribution
Plans." 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.
 
     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" on page 22.
 
     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
 
                                       18
<PAGE>   21
 
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 dealers' 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. Approximately ten years after
issuance, Class B shares will convert automatically into Class D shares, which
are subject to an account maintenance fee but 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. The proceeds from the ongoing
account maintenance fee are used to compensate Merrill Lynch for providing
continuing account maintenance activities. 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 one year 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.
 
     The following table sets forth the rates of the CDSC on Class B shares:
 
<TABLE>
<CAPTION>
                                                                 CONTINGENT DEFERRED SALES
                              YEAR SINCE                          CHARGE AS A PERCENTAGE
                               PURCHASE                              OF DOLLAR AMOUNT
                             PAYMENT MADE                            SUBJECT TO CHARGE
        -------------------------------------------------------  -------------------------
        <S>                                                      <C>
        0-1....................................................       1.0%
        Thereafter.............................................       None
</TABLE>
 
   
     For the period February 18, 1997 (commencement of operations) to October
31, 1997, the Distributor received CDSCs of $210 with respect to redemption 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 possible
applicable rate being charged. Therefore, it will be assumed that the redemption
is 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 CDSC will not be applied to dollar amounts representing an
increase in the net asset value since the time of purchase. A transfer of shares
 
                                       19
<PAGE>   22
 
from a shareholder's account to another account will be assumed to be made in
the same order as a 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 eighth month 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 charge 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 a CDSC at a rate of 1.0%
(the applicable rate in the first year after purchase).
 
     The Class B CDSC is waived on redemptions of shares in connection with
certain post-retirement withdrawals from an Individual Retirement Account
("IRA") or other retirement plan or following the death or disability (as
defined in the Code) of a shareholder. The Class B CDSC also is waived on
redemption of shares in connection with certain group plans through the Merrill
Lynch Blueprint(SM) Program. See "Shareholder Services -- Merrill Lynch
Blueprint(SM) Program." The CDSC is waived on redemption of shares by certain
eligible 401(a) and eligible 401(k) plans. The CDSC is also waived for any Class
B shares which are purchased by an eligible 401(k) or eligible 401(a) plan and
are rolled over into a Merrill Lynch, Pierce, Fenner & Smith Incorporated or
Merrill Lynch Trust Company custodied IRA and held in such account at the time
of redemption and for any Class B shares that were acquired and held at the time
of the redemption in an Employee Access(SM) Account available through employers
providing eligible 401(k) plans. The Class B CDSC is also 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
for redemptions made in connection with fund participation in certain fee-based
programs. See "Shareholder Services -- Fee-Based Programs."
 
     Contingent Deferred Sales Charges -- Class C Shares. Class C shares which
are redeemed within one year of purchase may be subject to a 1.0% CDSC charged
as a percentage of the dollar amount subject thereto. The charge will be
assessed on an amount equal to the lesser of the proceeds of redemption or the
cost of the shares being redeemed. Accordingly, no Class C CDSC will be imposed
on increases in net asset value above the initial purchase price. In addition,
no Class C CDSC will be assessed on shares derived from reinvestment of
dividends or capital gains distributions. The Class C CDSC may be waived in
connection with certain fee-based programs. See "Shareholder
Services -- Fee-Based Programs."
 
     The following table sets forth the rates of the CDSC on Class C shares:
 
<TABLE>
<CAPTION>
                                                                 CONTINGENT DEFERRED SALES
                              YEAR SINCE                          CHARGE AS A PERCENTAGE
                               PURCHASE                              OF DOLLAR AMOUNT
                             PAYMENT MADE                            SUBJECT TO CHARGE
        -------------------------------------------------------  -------------------------
        <S>                                                      <C>
        0-1....................................................       1.0%
        Thereafter.............................................       None
</TABLE>
 
     For the period February 18, 1997 (commencement of operations) to October
31, 1997, the Distributor received no CDSCs with respect to redemptions of Class
C shares.
 
     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
 
                                       20
<PAGE>   23
 
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. Class D shares are subject to an ongoing account
maintenance fee at an annual rate of 0.10% of average daily 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.
 
     Class B shareholders holding share certificates must deliver such
certificates to the Transfer Agent at least one week prior to the Conversion
Date applicable to those shares. Shares evidenced by certificates that are not
received by the Transfer Agent at least one week prior to the Conversion Date
will be converted into Class D shares on the next scheduled Conversion Date
after such certificates are delivered.
 
     In general, Class B shares of MLAM-advised equity mutual funds will convert
approximately eight years after initial purchase, and Class B shares of
MLAM-advised taxable and tax-exempt fixed income 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 is modified for shareholders who purchased Class B
shares through certain retirement plans which qualified for a waiver of the CDSC
normally imposed on purchases of Class B shares ("Class B Retirement Plans").
When the first share of any MLAM-advised mutual fund purchased by a Class B
Retirement Plan has been held for ten years (i.e., ten years from the date the
relationship between MLAM-advised mutual funds and the Class B Retirement Plan
was established), all Class B shares of all MLAM-advised mutual funds held in
that Class B Retirement Plan will be converted into Class D shares of the
appropriate funds. Subsequent to such conversion, that Class B Retirement Plan
will be sold Class D shares of the appropriate funds at net asset value per
share.
 
     In the event that all Class B shares held in a single account are converted
to Class D shares on a Conversion Date, shares representing reinvestment of
declared but unpaid dividends on those Class B shares
 
                                       21
<PAGE>   24
 
also will be converted to Class D shares; otherwise, only Class B shares
purchased through reinvestment of dividends paid will convert to Class D shares
on the Conversion Date.
 
     The Conversion Period may also be modified for retirement plan investors
who participate in certain fee-based programs. See "Shareholder Services -- Fee
Based-Programs."
 
DISTRIBUTION PLANS
 
     The Fund has adopted separate distribution plans for Class B, Class C and
Class D shares pursuant to Rule 12b-1 under the Investment Company Act (each a
"Distribution Plan") with respect to the account maintenance and/or distribution
fees paid by the Fund to the Distributor with respect to such classes. The Class
B and Class C Distribution Plans provide for the payment of account maintenance
fees and distribution fees, and the Class D Distribution Plan provides for the
payment of account maintenance fees.
 
     The Distribution Plans for Class B, Class C and Class D shares each provide
that the Fund pays the Distributor an account maintenance fee relating to the
shares of the relevant class of the Fund's shares, accrued daily and paid
monthly, at the annual rate of 0.25% of average daily net assets of the relevant
class for Class B and Class C shares, and 0.10% of average daily net assets
attributable to the relevant class for Class D shares 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% of
average daily net assets attributable to the relevant class for Class B and
Class C shares, 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. 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 CDSC and ongoing distribution fees provide for the financing of the
distribution of the Fund's Class B and Class C shares.
 
     Prior to reorganization of the Fund at the close of business on February
14, 1997, pursuant to the Fund's then existing distribution plan (the "prior
distribution plan"), the Fund paid the Distributor a monthly fee at the annual
rate of 0.15% of the Fund's average daily net assets in order to compensate the
Distributor for the services it provided. During the fiscal year ended October
31, 1997, the Fund paid the Distributor $20,712 pursuant to the prior
distribution plan (based on average daily net assets subject to such prior
distribution plan of approximately $46.2 million), all of which was paid to
Merrill Lynch for the services it provided.
 
   
     For the period February 18, 1997 to October 31, 1997, the Fund paid the
Distributor $650 pursuant to the Class B Distribution Plan (based on average
daily net assets subject to such Class B Distribution Plan of approximately
$306,000), all of which was paid to Merrill Lynch for providing account
maintenance and distribution-related activities and services in connection with
Class B shares. For the period February 18, 1997 to October 31, 1997, the Fund
paid the Distributor $4 pursuant to the Class C Distribution Plan (based on
average daily net assets subject to such Class C Distribution Plan of
approximately $2,000), all of which was
    
 
                                       22
<PAGE>   25
 
paid to Merrill Lynch for providing account maintenance and distribution-related
activities and services in connection with Class C shares. For the period
February 18, 1997 (shares of the Fund were reclassified as Class D shares in
connection with the reorganization on February 14, 1997) to October 31, 1997,
the Fund paid the Distributor $23,955 pursuant to the Class D Distribution Plan
(based on average daily net assets subject to such Class D Distribution Plan of
approximately $34.0 million), all of which was paid to Merrill Lynch for
providing account maintenance activities in connection with Class D shares.
 
     The payments under the Distribution Plans are based on a percentage of
average daily net assets attributable to the relevant 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 to be presented annually as of December 31 of each
year on a "fully allocated accrual" basis and quarterly on a "direct expense and
revenue/cash" basis. On the fully allocated accrual basis, revenues consist of
the account maintenance fees, distribution fees, the CDSC 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 the CDSC
and the expenses consist of financial consultation compensation.
 
   
     As of December 31, 1996, the last date for which fully allocated accrual
data is available, the fully allocated accrual expenses incurred by the
Distributor and Merrill Lynch under the Fund's prior distribution plan since the
Fund commenced operations on November 6, 1986 exceeded revenues for such period
by $1,546,000 (2.43%) of net assets at that date).
    
 
   
     Direct cash revenues attributable to Class B shares for the period from
February 18, 1997 (commencement of operations) to October 31, 1997 exceeded
direct expenses for such period by $486 (representing .06% of net assets
attributable to Class B shares at that date). Direct cash revenues attributable
to Class C shares for the period from February 18, 1997 (commencement of
operations) to October 31, 1997 exceeded direct expenses for such period by $4
(representing .009% of net assets attributable to Class C shares at that date).
Direct cash revenues attributable to Class D shares for the period from November
11, 1996 to October 31, 1997 exceeded direct expenses for such period by $24,341
(representing .08% of net assets attributable to Class D shares at that date).
    
 
     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 the Class B, Class C and Class D shares, and there is no
assurance that the Board of Trustees of the Fund 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 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."
 
                                       23
<PAGE>   26
 
LIMITATIONS ON THE PAYMENT OF DEFERRED SALES CHARGES
 
     The maximum sales charge rule in the Rules of Fair Practice of the NASD
imposes a limitation on certain asset-based sales charges, such as the Fund's
distribution fee and the CDSC borne by the Class B and Class C shares but not
the account maintenance fees. The maximum sales charge rule is applied
separately by each class. As applicable to the Fund, the maximum sales charge
rule limits the aggregate of distribution fee payments and CDSCs payable to the
sum of (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
reinvestment and exchanges) and (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 Class B shares is 6.75% of eligible gross sales. The Distributor
retains the right to stop waiving the interest charge 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 fees. 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 table on the following page sets forth comparative information for the
period February 18, 1997 (commencement of Class B operations) to October 31,
1997 with respect to the Class B shares of the Fund, indicating allowable
payments that can be made under the NASD maximum sales charge rule and the
Distributor's voluntary maximum. No information is presented for the Class C
shares of the Fund because Class C shares are not available for purchase but
will be issued only pursuant to the Exchange Privilege to holders of Class C
shares of other MLAM-advised mutual funds who elect to exchange Class C shares
of such other MLAM-advised mutual fund for Class C shares of the Fund.
    
 
                                       24
<PAGE>   27
 
                     DATA CALCULATED AS OF OCTOBER 31, 1997
 
   
<TABLE>
<CAPTION>
                                                                                                             ANNUAL
                                                                                                          DISTRIBUTION
                                     ALLOWABLE    ALLOWABLE                   AMOUNTS                        FEE AT
                         ELIGIBLE    AGGREGATE     INTEREST     MAXIMUM      PREVIOUSLY      AGGREGATE      CURRENT
                          GROSS        SALES      ON UNPAID     AMOUNT        PAID TO         UNPAID       NET ASSET
                         SALES(1)     CHARGES     BALANCE(2)    PAYABLE    DISTRIBUTOR(3)     BALANCE       LEVEL(4)
                         --------    ---------    ----------    -------    --------------    ---------    ------------
                                                           (NOT IN THOUSANDS)
<S>                      <C>         <C>          <C>           <C>        <C>               <C>          <C>
Under NASD Rule as
  Adopted.............   $54,204      $3,388         $ 47       $3,435          $320          $3,115         $2,072
Under Distributor's                                                                                  
  Voluntary Waiver....   $54,204      $3,388         $270       $3,658          $320          $3,338         $2,072
</TABLE>
    
 
- ------------
   
(1)  Purchase price of all eligible Class B shares sold since February 18, 1997
     (commencement of Class B operations) 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. 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 imposition of a sales charge, in Class A shares in
     conjunction with the shareholder's participation in the Merrill Lynch Fund
     Adviser (Merrill Lynch MFA(SM)) Program (the "MFA Program"). The CDSC is
     booked as a contingent obligation that may be payable when the shareholder
     terminates participation in the MFA Program. See "Purchase of
     Shares -- Distribution Plans" in the Prospectus.
(4)  Provided to illustrate the extent to which the current level of
     distribution fee payments (not including any CDSC payments) is amortizing
     the unpaid balance. No assurance can be given that payments of the
     distribution fee will reach either the voluntary maximum or the NASD
     maximum.
 
                              REDEMPTION OF SHARES
 
     The Fund is required to redeem for cash all shares 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
in the case of Class A or Class D shares, and is the net asset value per share
next determined after the initial receipt of proper notice of redemption, less
the applicable CDSC, if any, in the case of Class B or Class C Shares. Except
for any CDSC which may be applicable to Class B or Class C Shares, there will be
no charge for redemption if the redemption request is sent directly to the
Transfer Agent. Shareholders liquidating their total holdings also will receive
upon redemption all dividends declared on the shares redeemed. If a shareholder
redeems all of the shares in his account, he will receive, in addition to the
net asset value of the shares redeemed, a separate check representing all
dividends declared but unpaid. If a shareholder redeems a portion of the shares
in his account, the dividends declared but unpaid on the shares redeemed will be
distributed on the next dividend payment date.
 
     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 at such
time.
 
REDEMPTION
 
     A shareholder wishing to redeem shares may do so 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
 
                                       25
<PAGE>   28
 
Deer Lake Drive East, Jacksonville, Florida 32246-6484. Proper notice of
redemption in 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. The notice in either event requires the signature(s)
of all persons in whose name(s) the shares are registered, signed exactly as
their name(s) appears on the Transfer Agent's register or on the certificate, as
the case may be. 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, the existence and validity of which may be
verified by the Transfer Agent through the use of industry publications.
Notarized signatures are not sufficient. Examples of "eligible guarantor
institutions" include most commercial banks and broker dealers (including, for
example, Merrill Lynch branch offices). Information regarding other financial
institutions which qualify as "eligible guarantor institutions" may be obtained
from the Transfer Agent. 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, payment will be mailed within seven days after receipt of a proper notice
of redemption.
 
     At various times the Fund may be requested to redeem shares for which it
has not yet received good payment. The Fund may delay or cause to be delayed the
mailing of a redemption check until such time as it has assured itself that good
payment (e.g., cash or certified check drawn on a United States bank) has been
collected for the purchase of such shares. Normally, this delay will not exceed
10 days.
 
REPURCHASE
 
   
     The Fund normally will accept orders to repurchase 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 purchase
is received by the dealer prior to the close of business on the NYSE (generally,
4:00 P.M., New York City time) on the day received, and such request is received
by the Fund from such dealer not later than 30 minutes after the close of
business on the NYSE on the same day. Dealers have the responsibility of
submitting such repurchase requests to the 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 Fund (other than any applicable
CDSC). Securities firms that do not have selected dealer agreements with the
Distributor may impose a transaction charge on the shareholder for transmitting
the notice of repurchase to the Fund. 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 Fund reserves the right to reject any order
for repurchase, which right of rejection might adversely affect shareholders
seeking redemption through the repurchase procedure. A shareholder whose order
for repurchase is rejected by the Fund, however, may redeem 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.
 
                                       26
<PAGE>   29
 
REINSTATEMENT PRIVILEGE -- CLASS A AND CLASS D SHARES
 
     As described in further detail in the Statement of Additional Information,
holders of Class A or Class D shares who have redeemed their shares have a
privilege to reinstate their accounts by purchasing shares of the same class 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 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.
 
                       DIVIDENDS, DISTRIBUTIONS AND TAXES
 
DIVIDENDS AND DISTRIBUTIONS
 
     It is the Fund's intention to distribute substantially all of the net
investment income of the Fund, if any. The net investment income of the Fund is
declared as dividends daily immediately prior to the determination of the net
asset value of the Fund on that day and reinvested monthly in additional full
and fractional shares of the Fund at net asset value unless the shareholder
elects to receive such dividends in cash. The net investment income of the Fund
for dividend purposes consists of interest and dividends earned on portfolio
securities, less expenses, in each case computed since the most recent
determination of net asset value. Expenses of the Fund, including the advisory
fee and any account maintenance and/or distribution fees (if applicable), are
accrued daily. Shares will accrue dividends as long as they are issued and
outstanding. The per share dividends and distributions on Class B and Class C
shares will be lower than the per share dividends and distributions on Class A
and Class D shares as a result of the account maintenance, distribution and
higher transfer agency fees applicable to the Class B and Class C shares.
Similarly, the per share dividends and distributions on Class D shares will be
lower than the per share dividends and distributions on Class A shares as a
result of the account maintenance fees applicable with respect to the Class D
shares. See "Additional Information -- Determination of Net Asset Value." Shares
are issued and outstanding as of the settlement date of a purchase order to the
settlement date of a redemption order.
 
     In order to avoid a four percent nondeductible excise tax, a regulated
investment company must distribute to its shareholders during the calendar year
an amount equal to 98 percent of the Fund's investment company income, with
certain adjustments, for such calendar year, plus 98 percent of the Fund's
capital gain net income for the one-year period ending on October 31 of such
calendar year. All net realized long- or short-term capital gains of the Fund,
if any, are declared and distributed to the shareholders of the Fund annually
after the close of the Fund's fiscal year.
 
     See "Shareholder Services -- Automatic Reinvestment of Dividends and
Capital Gain Distributions" for information concerning the manner in which
dividends and distributions may be automatically reinvested in shares of the
Fund. Shareholders may elect in writing to receive any such dividends or
distributions, or both, in cash. Dividends and distributions are taxable to
shareholders as discussed below whether they are reinvested in shares or
received in cash.
 
                                       27
<PAGE>   30
 
FEDERAL INCOME TAXES
 
     The Fund has in the past elected the special tax treatment afforded
regulated investment companies under the Internal Revenue Code of 1986 (the
"Code"). The Fund believes that it has qualified for such treatment and intends
to continue to qualify therefor. If it so qualifies, the Fund (but not its
shareholders) will be relieved of federal income tax on the amount it
distributes to Class A, Class B, Class C and Class D shareholders (together, the
"shareholders"). If in any taxable year the Fund does not qualify as a regulated
investment company, all of its taxable income will be taxed at corporate rates.
 
     The Fund contemplates declaring as dividends substantially all of its net
investment income. See "Dividends and Distributions." Dividends paid by the Fund
from its investment income and distributions of its net realized short-term
capital gains are taxable to shareholders as ordinary income. Distributions made
from net realized long-term capital gains are taxable to shareholders as
long-term capital gains. Dividends and distributions will be taxable to
shareholders as ordinary income or capital gains, whether received in cash or
reinvested in additional shares of the Fund. Merrill Lynch Financial Data
Services, Inc., the Fund's transfer agent, will send each shareholder a monthly
dividend statement which will include the amount of dividends paid and identify
whether such dividends represent ordinary income or capital gains.
 
     Upon sale or exchange of shares of the Fund, a shareholder will realize
short- or long-term capital gain or loss, depending upon the shareholder's
holding period in the shares. However, if a shareholder's holding period in his
shares is six months or less, any capital loss realized from a sale or exchange
of such shares must be treated as long-term capital loss to the extent of
capital gains dividends received with respect to such shares. Under the Taxpayer
Relief Act of 1997 (the "1997 Tax Act"), the maximum tax rates applicable to net
capital gains recognized by individuals and other non-corporate taxpayers are
(i) the same as ordinary income rates for capital assets held for one year or
less, (ii) 28% for capital assets held for more than one year but not more than
18 months and (iii) 20% for capital assets held for more than 18 months.
Shareholders should consult their own tax advisors regarding the availability
and effect of a certain tax election to mark-to-market shares of the Fund held
on January 1, 2001. Capital gains or losses recognized by corporate shareholders
are subject to tax at the ordinary income tax rates applicable to corporations.
The new tax rates for capital gains under the 1997 Tax Act described above apply
to distributions of capital gain dividends by regulated investment companies
("RICs") such as the Fund as well as to sales and exchanges of shares in RICs
such as the Fund.
 
   
     On November 24, 1997 the Service issued a notice describing temporary
treasury regulations to be issued, effective for tax years ending on or after
May 7, 1997, addressing how RICs and their shareholders are to apply the new tax
rates to capital gain dividends. According to the notice, if a RIC designates a
dividend as a capital gain dividend for tax years ending on or after May 7,
1997, it may also, subject to certain limitations, calculate and designate the
dividend as a 20% rate gain distribution or a 28% rate gain distribution. A RIC
will notify its shareholders of the category of capital gain dividend received,
and shareholders will report and be subject to tax on the dividend at the rate
applicable for the category of capital gain dividend received.
    
 
   
     The Fund may recognize interest attributable to it from holding zero coupon
securities. Current federal tax law requires that, for most zero coupon
securities, the Fund must accrue a portion of the discount at which the security
was purchased as income each year even though the Fund receives no interest
payment in cash on the security during the year. As an investment company, the
Fund must pay out substantially all of its net
    
 
                                       28
<PAGE>   31
 
investment income each year. Accordingly, the Fund may be required to pay out as
an income distribution each year an amount which is greater than the total
amount of cash interest it actually received. Such distributions will be made
from the cash assets of the Fund or by sales of portfolio securities, if
necessary. The Fund may realize a gain or loss from such sales.
 
     Some shareholders may be subject to a 31% withholding tax on ordinary
income dividends, capital gains distributions 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
Fund or who, to the Fund's knowledge, have furnished an incorrect number. An
investor when establishing an account must certify under penalty of perjury that
such number is correct and that he is not otherwise subject to backup
withholding.
 
     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.
 
     Dividends to shareholders who are nonresident aliens, trusts, estates,
partnerships or corporations may be subject to a 30% United States withholding
tax unless a reduced rate of withholding is provided under an applicable treaty.
Shareholders who are nonresident aliens or foreign entities are urged to consult
their own tax advisers concerning the applicability of the United States
withholding tax.
 
   
     If a shareholder exercises his exchange privilege with respect to shares of
the Fund within 90 days after the date such shares were acquired, to acquire
shares in a second Fund ("New Fund"), then the loss, if any, recognized on the
exchange will be reduced (or the gain, if any, increased) to the extent the load
charge paid to the Fund reduces any load charge such shareholder would have been
required to pay on the acquisition of the New Fund shares in the absence of the
exchange privilege. Instead, such load charge will be treated as an amount paid
for the New Fund shares and will be included in the shareholder's basis for such
shares.
    
 
   
     Any dividend declared by the Fund to shareholders of record in October,
November, or December of any year and made payable to shareholders of record in
such a month will be deemed to have been received on December 31 of such year if
actually paid during the following January.
    
 
     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 and capital gains dividends may also be subject to state
and local taxes.
    
 
     The foregoing is a general and abbreviated summary of the applicable
provisions of the Code and Treasury Regulations presently in effect. For the
complete provisions, reference should be made to the pertinent Code sections and
the Regulations promulgated thereunder. The Code and Regulations are subject to
change by legislative or administrative action either prospectively or
retroactively.
 
     The Statement of Additional Information describes the effect of other
provisions of the Code on the Fund's shareholders.
 
                                       29
<PAGE>   32
 
     Investors are urged to consult their attorneys or tax advisers regarding
specific questions as to federal, foreign, state or local taxes.
 
                             PORTFOLIO TRANSACTIONS
 
     Subject to policies established by the Board of Directors of the Fund, the
Investment Adviser is responsible for the Fund's portfolio decisions and the
placing of the Fund's portfolio transactions. With respect to such transactions,
the Investment Adviser seeks to obtain the best net results for the Fund, taking
into account such factors as price (including the applicable brokerage
commission or dealer spread), size of order, difficulty of execution and
operational facilities of the firm involved and the firm's risk in positioning a
block of securities. While the Investment Adviser generally seeks reasonably
competitive commission rates, the Fund will not necessarily be paying the lowest
commission or spread available.
 
     The Fund has no obligation to deal with any dealer or group of dealers in
the execution of transactions in portfolio securities. Subject to the policy
established by the Board of Trustees, the Investment Adviser is primarily
responsible for the portfolio decisions of the Fund and the placing of its
portfolio transactions. In placing orders, it is the policy of the Fund to
obtain the best price and execution for its transactions. Affiliated persons of
the Fund, including Merrill Lynch, may serve as its broker in over-the-counter
transactions conducted on an agency basis.
 
                              SHAREHOLDER SERVICES
 
     The Fund offers a number of shareholder services described below which are
designed to facilitate investment in its shares. Full details as to each of such
services and copies of the various plans described below can be obtained from
the Fund, the Distributor or Merrill Lynch. Certain of these services are
available only to U.S. investors.
 
INVESTMENT ACCOUNT
 
     Each shareholder whose account is maintained with 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 purchase and the reinvestment of ordinary income dividends
and long-term capital gain distributions. These statements will also show any
other activity in the account since the previous statement. Shareholders will
receive separate transaction confirmations for each purchase or sale transaction
other than automatic investment purchases and the reinvestments of ordinary
income dividends and long-term capital gain distributions. A shareholder may
make additions to his Investment Account at any time by purchasing shares at the
applicable public offering price either through a securities dealer that has
entered into a selected dealers agreement with the Distributor or by mail
directly to the Transfer Agent, acting as agent for the Distributor.
 
     Shareholders also may maintain their accounts through Merrill Lynch. Upon
the transfer of shares out of a Merrill Lynch brokerage account, an Investment
Account in the transferring shareholder's name will be opened automatically,
without charge, 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
 
                                       30
<PAGE>   33
 
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. Shareholders considering transferring a
tax-deferred retirement account such as an individual retirement account from
Merrill Lynch to another brokerage firm or financial institution should be aware
that, if the firm to which the retirement account is to be transferred will not
take delivery of shares of the Fund, a shareholder must either redeem the 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 a
retirement account at Merrill Lynch for those shares.
 
     Share certificates are issued only for full shares and only upon the
specific request of the shareholder. 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.
 
AUTOMATIC INVESTMENT PLANS
 
     Regular additions of Class A, Class B and Class D shares may be made to an
investor's Investment Account by prearranged charges of $50 or more to his
regular bank account. 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)
accounts or in certain related accounts in amounts of $100 or more through the
CMA(R)/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 of shares 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.
 
                                       31
<PAGE>   34
 
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 sales charge, at the net
asset value per share of the Fund as of 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 or by telephone call
(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
capital gains distributions paid in cash, rather than reinvested, in which event
payment will be mailed on or about the payment date. 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 on redemptions 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 in the form of payments by check or through automatic
payment by direct deposit to his or her bank account on either a monthly or
quarterly basis. A shareholder whose shares are held within a CMA(R), CBA(R) or
Retirement 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. With respect to redemption 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." 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."
 
RETIREMENT PLANS
 
     As described in further detail in the Statement of Additional Information,
eligible shareholders of the Fund may participate in a variety of qualified
employee benefit plans which are available from Merrill Lynch.
 
EXCHANGE PRIVILEGE
 
     U.S. shareholders of each class of shares 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 in accordance with the rules of the
Securities and Exchange Commission (the "Commission").
 
                                       32
<PAGE>   35
 
     Under the Merrill Lynch Select Pricing(SM) System, Class A shareholders may
exchange Class A shares for Class A shares of a second MLAM-advised mutual fund
if the shareholder holds any Class A shares of the second fund in his account in
which the exchange is made at the time of the exchange or is otherwise eligible
to purchase Class A shares of the second fund. If the Class A shareholder wants
to exchange Class A shares for shares of a second MLAM-advised mutual fund, and
the shareholder does not hold Class A shares of the second fund in his account
at the time of the exchange and is not otherwise eligible to acquire Class A
shares of the second fund, the shareholder will receive Class D shares of the
second fund as a result of the exchange. Class D shares also may be exchanged
for Class A shares of a second MLAM-advised mutual fund at any time as long as,
at the time of the exchange, the shareholder holds Class A shares of the second
fund in the account in which the exchange is made or is otherwise eligible to
purchase Class A shares of the second fund.
 
     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 will be exchangeable with shares of the
same class of other MLAM-advised mutual funds. Class C shares are available only
through the Exchange Privilege.
 
     Shares which are subject to a CDSC will be 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. 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 is "tacked" to the
holding period of the newly acquired shares of the other fund.
 
     Class A, Class B, Class C and Class D shares also will be 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 CDSC schedule applicable to the Fund 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.
 
MERRILL LYNCH BLUEPRINT(SM) PROGRAM
 
     Class D shares of the Fund are offered to participants in the Merrill Lynch
Blueprint(SM) Program ("Blueprint"). In addition, participants in Blueprint who
own Class A shares of the Fund may purchase additional Class A shares of the
Fund through Blueprint. Blueprint is directed to small investors, group or
 
                                       33
<PAGE>   36
 
corporate IRAs and participants in certain affinity groups such as benefit
plans, credit unions and trade associations. Investors placing orders to
purchase Class A or Class D shares of the Fund through a Blueprint account will
acquire such Class A or Class D shares at a reduced sales charge calculated in
accordance with the standard Blueprint sales charge schedules. Class B shares of
the Fund are offered through Blueprint only to members of certain affinity
groups. The contingent deferred sales load will be waived in connection with
orders to purchase Class B shares of the Fund through Blueprint provided that
the shareholder is a participant in a qualified group plan at the time of
purchase. However, services available to Fund shareholders through Blueprint may
differ from those available to other Fund shareholders. Orders for purchase and
redemption of shares of the Fund may be grouped for execution purposes which, in
some circumstances, may involve the execution of such orders two business days
following the day such orders are placed. There will be no minimum initial or
subsequent purchase requirement for participants who are part of an automatic
investment plan. Additional information concerning placing orders to purchase
through Blueprint, including any annual fees and transaction charges, is
available from Merrill Lynch, Pierce, Fenner & Smith Incorporated, The
Blueprint(SM) Program, P.O. Box 30441, New Brunswick, New Jersey 08989-0441.
 
                                PERFORMANCE DATA
 
     From time to time the Fund may include the average annual total return and
yield of the Fund for various specified time periods in advertisements or
information furnished to present or prospective shareholders. Average annual
total return and yield are computed separately for the Class A, Class B, Class C
and Class D shares of the Fund 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 contingent deferred sales charge 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 in any advertisement or
information including performance data of the Fund.
 
     The Fund also may quote its 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
charge will not be included with respect to annual or annualized rate of return
calculations. Aside from the impact on the performance data calculations of
including or excluding the maximum applicable sales charge, 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 generally will be higher than average annual total return
data since the aggregate rates of return reflect
 
                                       34
<PAGE>   37
 
compounding over a longer period of time. In advertisements distributed to
investors whose purchases are subject to waiver of the CDSC in the case of Class
B and Class C shares (such as investors in certain retirement plans) or to
reduced sales charges in the case of Class A and Class D shares, performance
data may take into account the reduced, and not the maximum, sales charge or may
not take into account the contingent deferred sales charges and therefore may
reflect greater total return since, due to the reduced sales charges or waiver
of the contingent deferred sales charge, 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 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 to maturity 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. The yield for the 30-day period ended
October 31, 1997 was: 5.42% for Class A shares, 4.94% for Class B shares, 4.93%
for Class C shares and 5.34% for Class D shares.
 
     In connection with its reorganization at the close of business on February
14, 1997, the Fund changed its investment objective from investing only in
assets which would permit shares of the Fund to qualify both as "liquid assets"
under the regulations of the Office of Thrift Supervision and as an investment
permitted by the regulations of the National Credit Union Association to seeking
the highest possible current income consistent with the protection of capital
afforded by investing in intermediate-term debt securities issued or guaranteed
by the U.S. Government, its agencies or instrumentalities with a maximum
maturity not to exceed fifteen years and, under normal market conditions, a
dollar-weighted average maturity of six to eight years. For the period from the
commencement of the Fund's operations through its reorganization at the close of
business on February 14, 1997, the portfolio of the Fund has consisted primarily
of securities issued by the U.S. government and its agencies and
instrumentalities. The average maturity of the Fund's portfolio during this
period (generally ranging from two to five years) has been somewhat shorter than
the average maturity of the Fund of six to eight years following the change in
its investment objective upon its reorganization. As a result, financial
information for operations of the Fund prior to its reorganization may not be
indicative of its performance following its reorganization.
 
     Total return and yield figures are based on the Fund's historical
performance and are not intended to indicate future performance. The Fund's
total return and yield will vary depending on market conditions, the securities
held by the Fund, 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 the performance of the Fund to that of
the Standard & Poor's 500 Composite Stock Price Index, the Value Line Composite
Index, the Dow Jones Industrial Average, or performance data contained in
publications such as Lipper Analytical Services, Inc., Morningstar Publications,
Inc., Money Magazine, U.S. News & World Report, Business Week, CDA Investment
Technology, Inc., Forbes Magazine or Fortune Magazine. In addition, from time to
time the Fund may include the Fund's risk-adjusted performance ratings assigned
by Morningstar Publications, Inc. in advertising 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.
 
                                       35
<PAGE>   38
 
                             ADDITIONAL INFORMATION
 
DETERMINATION OF NET ASSET VALUE
 
     The net asset value of all classes of shares of the Fund is determined once
daily by MLAM immediately after the declaration of dividends as of 15 minutes
after the close of business on the NYSE (generally 4:00 p.m., New York City
time) on each day during which the NYSE is open for trading and on any other day
on which there is sufficient trading in the Fund's portfolio securities that net
asset value might be materially affected but only if on any such day the Fund is
required to sell or redeem shares. The Fund's net asset value per share is
computed by dividing the sum of the value of the portfolio securities held by
the Fund plus any cash or other assets minus all liabilities by the total number
of shares outstanding at such time, rounded to the nearest cent. Expenses,
including the investment advisory fee payable to MLAM and any account
maintenance and/or distribution fees payable to the Distributor, are accrued
daily. The Fund employs Merrill Lynch Securities Pricing Service ("MLSPS"), an
affiliate of the Investment Adviser, to provide certain securities prices for
the Fund. For the fiscal year ended October 31, 1997, the Fund paid MLSPS $778
for securities price quotations to compute the net asset value of the Fund.
 
     The per share net asset value of Class A shares generally will be higher
than the per share net asset value of Class B, Class C and Class D 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 fee applicable
with respect to Class D shares. Moreover, the per share net asset value of Class
D shares generally will be higher than the per share net asset value of the
Class B and Class C shares, reflecting the daily expense accruals of the
distribution 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 four classes of shares 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.
 
ORGANIZATION OF THE FUND
 
     The Fund was organized as an unincorporated business trust under the laws
of Massachusetts under the name "Merrill Lynch Institutional Intermediate Fund"
on September 10, 1986. At the close of business on February 14, 1997, the Fund
was reorganized and changed its name to "Merrill Lynch Intermediate Government
Bond Fund." Its executive offices are located at One Financial Center, Boston,
Massachusetts 02111-2646 (telephone toll free 800-225-1576). Under the
Declaration of Trust, the Trustees are authorized to issue an indefinite number
of shares of $0.10 par value of one or more classes, and the Trustees have
designated four classes: "Class A Common Stock," "Class B Common Stock," "Class
C Common Stock" and "Class D Common Stock." Each Class A, Class B, Class C and
Class D share of Common Stock has equal voting rights, and each such issued and
outstanding share is entitled to one vote and to participate equally in
dividends and distributions declared by the Fund and in net assets of the Fund
upon liquidation or dissolution remaining after satisfaction of outstanding
liabilities. The shares of the Fund, when issued, will be fully paid and
non-assessable, be freely transferable and have no preference, preemptive,
conversion or similar rights, except that the Class B, Class C and Class D
shares bear certain expenses related to the account maintenance fees associated
with such shares, and Class B and Class C shares bear certain expenses related
to the distribution of such shares. Each class has exclusive voting rights with
respect to matters relating to such
 
                                       36
<PAGE>   39
 
account maintenance and distribution expenditures, as applicable. See "Purchase
of Shares." The Trustees are authorized to divide or combine such shares into a
greater or lesser number of shares and to classify and reclassify the shares of
the Fund into additional classes of Common Stock at a future date. Shares of the
Fund outstanding on the date the Fund was reorganized were reclassified as Class
D shares.
 
     There will normally be no meetings 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 Declaration of Trust, cause a
meeting of shareholders to be held for the purpose of voting on the removal of
Trustees. Meetings of the shareholders will be called upon written request of
shareholders holding in the aggregate not less than 10% of the outstanding
shares having voting rights. Except as set forth above, the Trustees will
continue to hold office and appoint successor trustees. Shares do not have
cumulative voting rights and the holders of more than 50% of the shares of the
Fund voting for the election of Trustees can elect all of the Trustees of the
Fund if they choose to do so and in such event the holders of the remaining
shares would not be able to elect any Trustees. Holders of shares of the Fund
are entitled to redeem their shares as set forth under "Redemption of Shares."
No amendment may be made to the Declaration of Trust without the affirmative
vote of a majority of the outstanding shares of the Fund.
 
     The Declaration of Trust establishing the Fund, dated September 10, 1986, 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 of the Fund 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 Fund may be held to any personal
liability, nor may resort be had to their private property for the satisfaction
of any obligation or claim otherwise in connection with the affairs of the Fund
but the Fund's property only shall be liable.
 
     For further information concerning the organization of the Fund, see the
Statement of Additional Information.
 
INDEPENDENT AUDITORS
 
     Deloitte & Touche LLP, independent auditors, has been selected as the
independent auditors of the Fund.
 
CUSTODIAN
 
     State Street Bank and Trust Company, Boston, Massachusetts, acts as
Custodian of the Fund's assets.
 
LEGAL COUNSEL
 
     Rogers & Wells LLP, New York, New York, is counsel for the Fund and passes
upon legal matters for the Fund in connection with the shares offered by this
Prospectus.
 
SHAREHOLDER INQUIRIES
 
     Shareholder inquiries may be addressed to the Fund at the address or
telephone number set forth in the cover page of this Prospectus.
 
REPORTS TO SHAREHOLDERS
 
     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
 
                                       37
<PAGE>   40
 
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
please call your Merrill Lynch Financial Consultant or Merrill Lynch Financial
Data Services, Inc. at 800-637-3863.
 
ADDITIONAL INFORMATION
 
     This Prospectus does not contain all the information included in the
Registration Statement filed with the Commission under the Securities Act of
1933 and the Investment Company Act of 1940, with respect to the securities
offered hereby, certain portions of which have been omitted pursuant to the
rules and regulations of the Commission.
 
     To the knowledge of the Fund as of January 1, 1998, no entities owned
beneficially more than 5% of the Fund's outstanding shares other than William E.
Arnold, CO., P.O. Box 371, Jacksonville, FL 32201, who owned 5.7% of the Fund;
Kingsbury Capital Partners, 3655 Nobel Dr. #490, San Diego, CA 92122, which
owned 5.7% of the Fund; and Highway Fed Credit Union, 111 Empire Dr., Saint
Paul, MN 55103, which owned 5.6% of the Fund. Each entity owned Class D shares.
 
   
     The Statement of Additional Information, dated February 18, 1998, which
forms a part of the Registration Statement, is incorporated by reference into
this Prospectus. The Statement of Additional Information may be obtained without
charge as provided on the cover page of this Prospectus. The Registration
Statement, including the exhibits filed therewith, may be examined at the office
of the Securities and Exchange Commission in Washington, D.C.
    
 
                                       38
<PAGE>   41
 
 MERRILL LYNCH INTERMEDIATE GOVERNMENT 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 D shares
 
of Merrill Lynch Intermediate Government 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.)
 
<TABLE>
<S>                                                            <C>
1.-------------------------------------------------------      4.
                                                               -------------------------------------------------------
 
2.
  -------------------------------------------------------      5.
                                                               -------------------------------------------------------
 
3.
  -------------------------------------------------------      6.
                                                               -------------------------------------------------------
</TABLE>
 
Name
    --------------------------------------------------------------------------
     First Name                     Initial                    Last Name
 
Name of Co-Owner (if any)
                         -----------------------------------------------------
                         First Name            Initial              Last Name
 
Address
       -----------------------------------------------------------------------
                                                             (Zip Code)
 
<TABLE>
<S>                                                            <C>
Occupation                                                     Name and Address of Employer
 
- ---------------------------------------------------------      ---------------------------------------------------------
Signature of Owner                                             Signature of Co-Owner (if any)
</TABLE>
 
(In the case of co-owners, a joint tenancy with right of survivorship will be
presumed unless otherwise specified.)
- --------------------------------------------------------------------------------
 
2. DIVIDEND AND CAPITAL GAIN DISTRIBUTION OPTIONS
 
<TABLE>
<S>                                                      <C>
Ordinary Income Dividends                                Long-Term Capital Gains
- ---------------------------------------------------      ---------------------------------------------------
  Select  [ ]  Reinvest                                  Select  [ ]  Reinvest
  One:    [ ]  Cash                                      One:    [ ]  Cash
- ---------------------------------------------------      ---------------------------------------------------
</TABLE>
 
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 Intermediate Government 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.
 
                                       39
<PAGE>   42
 
     MERRILL LYNCH INTERMEDIATE GOVERNMENT 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 LANGUAGE IN (2) ABOVE IF YOU HAVE BEEN
NOTIFIED THAT YOU ARE SUBJECT TO BACKUP WITHHOLDING DUE TO UNDER-REPORTING 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.
 
<TABLE>
<S>                                                             <C>
- ---------------------------------------------------------       ---------------------------------------------------------
                    Signature of Owner                                        Signature of Co-Owner (if any)
</TABLE>
 
- --------------------------------------------------------------------------------
4. LETTER OF INTENTION -- CLASS A AND D SHARES ONLY (See terms and conditions in
   the Statement of Additional Information)
 
                                   --------------------------------------, 19 __
 
                                              Date of Initial Purchase
Dear Sir/Madam:
 
    Although I am not obligated to do so, I intend to purchase shares of Merrill
Lynch Intermediate Government 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:
 
      [ ] $100,000      [ ] $250,000      [ ] $500,000      [ ] $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 Intermediate
Government Bond Fund Prospectus.
 
    I agree to the terms and conditions of this 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 Intermediate Government Bond Fund held as security.
 
<TABLE>
<S>                                                <C>
By ---------------------------------------        -------------------------------------------------------------------
              Signature of Owner                  Signature of Co-Owner (if registered in joint names, both must sign)
</TABLE>
 
    In making purchases under this letter, the following are the related
accounts on which reduced offering prices are to apply:
 
<TABLE>
<S>                                                             <C>
(1) Name -----------------------------------------------        (2) Name -----------------------------------------------

Account Number -----------------------------------------        Account Number -----------------------------------------
</TABLE>
 
- --------------------------------------------------------------------------------
 
5. FOR DEALER ONLY
 
- --                       Branch Office, Address, Stamp.                      --
 
                                                                                
 
- --                                                                           -- 
 
This form when completed should be mailed to:
 
Merrill Lynch Intermediate Government Bond Fund
c/o Merrill Lynch Financial Data Services, Inc.
P.O. Box 45289
Jacksonville, FL 32232-5289

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.
 
- ---------------------------------------------------------
                            Dealer Name and Address
 
By:---------------------------------------------------------
                          Authorized Signature of Dealer
 
[][]       [][][][][]
                               ------------------------
Branch-Code    F/C No.               F/C Last Name
 
[][]       [][][][][]
Dealer's Customer A/C No.
 
                                       40
<PAGE>   43
 
 MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND -- AUTHORIZATION FORM (PART 2)
- --------------------------------------------------------------------------------
 
NOTE: THIS FORM IS REQUIRED TO APPLY FOR THE SYSTEMATIC WITHDRAWAL OR AUTOMATIC
INVESTMENT PLANS ONLY.
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                                            <C>
1. ACCOUNT REGISTRATION                                                                               Social Security No.
Name of Owner ------------------------------------------                     or Taxpayer Identification No.
Name of Co-Owner (if any) -------------------------------      Account number ------------------------------------------
                                                               (if existing account)
Address -------------------------------------------------
 
- --------------------------------------------------------
</TABLE>
 
- --------------------------------------------------------------------------------
   
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
Intermediate Government 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 withdrawals on ________ or as soon as possible
thereafter.
                   (month)
 
SPECIFY THE AMOUNT OF THE WITHDRAWAL YOU WOULD LIKE, HOW YOU WOULD LIKE YOUR
WITHDRAWAL 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
- ---------------------
 
(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 Owner
 
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 SHALL 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.
 
                                       41
<PAGE>   44
 
     MERRILL LYNCH INTERMEDIATE GOVERNMENT 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 described below
each month to purchase: (choose one)
 
       [ ] Class A shares       [ ] Class B shares      [ ] Class D shares
 
of Merrill Lynch Intermediate Government 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.
 
<TABLE>
<S>                                                           <C>
          MERRILL LYNCH FINANCIAL DATA                                    AUTHORIZATION TO HONOR ACH DEBITS
                  SERVICES, INC.                                          DRAWN BY MERRILL LYNCH FINANCIAL
You are hereby authorized to draw an ACH debit each month     DATA SERVICES, INC.
on my bank account for investment in Merrill Lynch            To_________________________________________________ Bank
Intermediate Government Bond Fund as indicated below:                          (Investor's Bank)
    Amount of each ACH debit $________________________        Bank Address
    Account Number____________________________________        City State ------ Zip Code ------------
Please date and invest ACH debits on the 20th of each         As a convenience to me, I hereby request and authorize you
month                                                         to pay and charge to my account ACH debits drawn on my
beginning___________ or as soon thereafter as possible.       account by and payable to Merrill Lynch Financial Data
          (month)                                             Services, Inc. I agree that your rights in respect to each
I agree that you are drawing these ACH debits voluntarily     such debit shall be the same as if it were a check drawn
at my request and that you shall not be liable for any        on you and signed personally by me. This authority is to
loss arising from any delay in preparing or failure to        remain in effect until revoked personally by me in
prepare any such debit. If I change banks or desire to        writing. Until you receive such notice, you shall be fully
terminate or suspend this program, I agree to notify you      protected in honoring any such debit. I further agree that
promptly in writing. I hereby authorize you to take any       if any such debit be dishonored, whether with or without
action to correct erroneous ACH debits of my bank account     cause and whether intentionally or inadvertently, you
or purchases of Fund shares including liquidating shares      shall be under no liability.
of the Fund and crediting my bank account. I further agree    ------------------     -----------------------------------
that if a check or debit is not honored upon presentation,         Date                        Signature of Depositor
Merrill Lynch Financial Data Services, Inc. is authorized     
to discontinue immediately the Automatic Investment Plan      ---------------------   ----------------------------------
and to liquidate sufficient shares held in my account to      Bank Account Number          Signature of Depositor
offset the purchase made with the dishonored debit.           (If joint account, both must sign)

 ---------------          -----------------------------
     Date                    Signature of Depositor

                          ------------------------------
                             Signature of Depositor
                        (If joint account, both must sign)
</TABLE>

NOTE: IF AUTOMATIC INVESTMENT PLAN IS ELECTED, YOUR BLANK, UNSIGNED CHECK MARKED
"VOID" SHOULD ACCOMPANY THIS APPLICATION.
 
                                       42
<PAGE>   45
 
                               INVESTMENT ADVISER
 
                      Merrill Lynch Asset Management, L.P.
                            Administrative Offices:
                             800 Scudders Mill Road
                          Plainsboro, New Jersey 08536
 
                                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 08536
 
                                Mailing Address:
                                 P.O. Box 9081
                        Princeton, New Jersey 08543-9081
 
                                 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
 
                                   CUSTODIAN
 
                      State Street Bank and Trust Company
                                  P.O. Box 351
                          Boston, Massachusetts 02101
 
                              INDEPENDENT AUDITORS
 
                             Deloitte & Touche LLP
                                117 Campus Drive
                          Princeton, New Jersey 08540
 
                                    COUNSEL
 
   
                               Rogers & Wells LLP
    
                                200 Park Avenue
                            New York, New York 10166
<PAGE>   46
 
- ------
 
  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 FUND, THE INVESTMENT ADVISER 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.....    3
Financial Highlights........................    9
Investment Objectives and Policies..........   10
  Investment Restrictions...................   10
  Other Portfolio Strategies................   10
Investment Adviser..........................   11
  Code of Ethics............................   12
  Transfer Agency Services..................   13
Trustees....................................   13
Purchase of Shares..........................   14
  Initial Sales Charge Alternatives -- Class
    A and Class D Shares....................   16
  Deferred Sales Charge
    Alternatives -- Class B and Class C
    Shares..................................   18
  Distribution Plans........................   22
  Limitations on the Payment of Deferred
    Sales Charges...........................   24
Redemption of Shares........................   25
  Redemption................................   25
  Repurchase................................   26
  Reinstatement Privilege -- Class A and
    Class D Shares..........................   27
Dividends, Distributions and Taxes..........   27
  Dividends and Distributions...............   27
  Federal Income Taxes......................   28
Portfolio Transactions......................   30
Shareholder Services........................   30
  Investment Account........................   30
  Automatic Investment Plans................   31
  Fee-Based Programs........................   31
  Automatic Reinvestment of Dividends and
    Capital Gains Distributions.............   32
  Systematic Withdrawal Plans...............   32
  Retirement Plans..........................   32
  Exchange Privilege........................   32
  Merrill Lynch Blueprint(SM) Program.......   33
Performance Data............................   34
Additional Information......................   36
  Determination of Net Asset Value..........   36
  Organization of the Fund..................   36
  Independent Auditors......................   37
  Custodian.................................   37
  Legal Counsel.............................   37
  Shareholder Inquiries.....................   37
  Reports to Shareholders...................   37
  Additional Information....................   38
Authorization Form..........................   39
                                  Code 10431-0298
</TABLE>
    
 
    (Merrill Lynch Logo)
    MERRILL LYNCH
    INTERMEDIATE GOVERNMENT
    BOND FUND
                                                        [MLYNCH COMPASS GRAPHIC]
 
PROSPECTUS
 
   
February 18, 1998
    
 
Distributor:
Merrill Lynch
Funds Distributor, Inc.
 
This prospectus should be
retained for future reference.
<PAGE>   47
 
STATEMENT OF ADDITIONAL INFORMATION
   
FEBRUARY 18, 1998
    
 
                MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
  P.O. BOX 9011, PRINCETON, NEW JERSEY 08543-9011 -- PHONE NO. (609) 282-2800
 
                            ------------------------
 
     Merrill Lynch Intermediate Government Bond Fund, Inc. (the "Fund") is a
diversified, open-end investment company. Pursuant to the Merrill Lynch Select
Pricing(SM) System, the Fund offers four classes of shares of Common Stock, each
with a different combination of sales charges, ongoing fees and other features,
except that Class C shares of the Fund are available only through the Exchange
Privilege. The Merrill Lynch Select Pricing(SM) System permits an investor to
choose the method of purchasing shares that the investor believes is most
beneficial given the amount of the purchase, the length of time the investor
expects to hold the shares and other relevant circumstances.
 
                            ------------------------
 
   
     This Statement of Additional Information of the Fund is not a prospectus
and should be read in conjunction with the Prospectus of the Fund (the
"Prospectus") dated February 18, 1998, which has been filed with the Securities
and Exchange Commission (the "Commission") and is available upon oral or written
request without charge. Copies of the Prospectus can be obtained 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.
    
 
     Prior to February 18, 1997, the Fund operated as the Merrill Lynch
Institutional Intermediate Fund. At the close of business on February 14, 1997,
the Fund was reorganized as the Merrill Lynch Intermediate Government Bond Fund
and shares of the Fund outstanding on that date were reclassified as Class D
Shares.
 
                            ------------------------
 
              MERRILL LYNCH ASSET MANAGEMENT -- INVESTMENT ADVISER
              MERRILL LYNCH FUNDS DISTRIBUTOR, INC. -- DISTRIBUTOR
<PAGE>   48
 
                       INVESTMENT OBJECTIVES AND POLICIES
 
     The investment objective of the Fund is to seek the highest possible
current income consistent with the protection of capital afforded by investing
in intermediate-term debt securities issued or guaranteed by the U.S.
Government, its agencies or instrumentalities with a maximum maturity not to
exceed fifteen years. Under normal circumstances, all or substantially all of
the Fund's assets will be invested in such securities. Under normal market
conditions, the Fund will maintain a dollar-weighted average maturity of six to
eight years.
 
     Reference is made to "Investment Objectives and Policies" on page 10 of the
Prospectus for a discussion of the investment objectives and policies of the
Fund.
 
                            INVESTMENT RESTRICTIONS
 
     The Fund has adopted the following 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 Investment Company Act of 1940
(the "Investment Company Act") 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).
 
     Under the fundamental investment restrictions, the Fund may not:
 
          1. Make any investment inconsistent with the Fund's classification as
     a diversified company under the Investment Company Act.
 
          2. 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).
 
          3. Make investments for the purpose of exercising control or
     management.
 
          4. 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.
 
          5. Make loans to other persons, except that the acquisition of bonds,
     debentures or other corporate debt securities and investment in government
     obligations, commercial paper, pass-through instruments, certificates of
     deposit, bankers' acceptances, repurchase agreements or any similar
     instruments shall not be deemed to be the making of a loan, and except
     further that the Fund may lend its portfolio securities, provided that the
     lending of portfolio securities may be made only in accordance with
     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.
 
          6. Issue senior securities to the extent such issuance would violate
     applicable law.
 
          7. Borrow money, except that (i) the Fund may borrow from banks (as
     defined in the Investment Company 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
 
                                        2
<PAGE>   49
 
     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.
 
          8. Underwrite securities of other issuers except insofar as the Fund
     technically may be deemed an underwriter under the Securities Act of 1933,
     as amended (the "Securities Act") in selling portfolio securities.
 
          9. Purchase or sell commodities or contracts on commodities, except to
     the extent that the Fund may do so in accordance with applicable law and
     the Fund's Prospectus and Statement of Additional Information, as they may
     be amended from time to time, and without registering as a commodity pool
     operator under the Commodity Exchange Act.
 
     Under the non-fundamental investment restrictions, the Fund may not:
 
          a. Purchase securities of other investment companies, except to the
     extent such purchases are permitted by applicable law. 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 Investment Company 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 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 Fund has
     otherwise determined to be liquid pursuant to applicable law.
 
          d. Notwithstanding fundamental investment restriction (7) above, the
     Fund will not borrow amounts in excess of 5% of the total assets of the
     Fund, taken at market value, and then only from banks as a temporary
     measure for extraordinary or emergency purposes such as the redemption of
     Fund shares. In addition, the Fund will not purchase securities while
     borrowings are outstanding.
 
     Because of the affiliation of Merrill Lynch, Pierce, Fenner & Smith
Incorporated ("Merrill Lynch") with the Fund, the Fund is prohibited from
engaging in certain transactions involving Merrill Lynch except pursuant to an
exemptive order or otherwise in compliance with the provisions of the Investment
Company Act and the rules and regulations thereunder. Included among such
restricted transactions are (i) purchases from or sales to Merrill Lynch of
securities in transactions in which Merrill Lynch acts as principal, and (ii)
purchases of securities from underwriting syndicates of which Merrill Lynch is a
member.
 
                                        3
<PAGE>   50
 
     Lending of Portfolio Securities. Subject to investment restriction (5)
above, the Fund from time to time may lend securities from its portfolio to
brokers, dealers and financial institutions and receive as collateral cash or
United States Treasury securities which at all times while the loan is
outstanding will be maintained in amounts equal to at least 100% of the current
market value of the loaned securities. Any cash collateral will be invested in
short-term securities, which will increase the current income of the Fund. Such
loans, which will not have terms longer than 30 days, will be terminable at any
time. The Fund will have the right to regain record ownership of loaned
securities to exercise beneficial rights such as voting rights, subscription
rights and rights of dividends, interest or other distributions. The Fund may
pay reasonable fees to persons unaffiliated with the Fund for services in
arranging such loans. In the event of a default by the borrower, the Fund may
suffer time delays and incur costs or possible losses in connection with the
disposition of the collateral.
 
     Forward Commitments. U.S. Government securities and corporate debt
obligations may be purchased on a forward commitment basis at fixed purchase
terms with periods of up to 45 days between the commitment and settlement dates.
The purchase will be recorded on the date the Fund enters into the commitment
and the value of the security will thereafter be reflected in the calculation of
the Fund's net asset value. The value of the security on the delivery date may
be more or less than its purchase price. A separate account of the Fund will be
established with the Custodian consisting of cash or liquid high grade debt
obligations having a market value at all times until the delivery date at least
equal to the amount of the forward commitment. Although the Fund will generally
enter into forward commitments with the intention of acquiring securities for
its portfolio, the Fund may dispose of a commitment prior to settlement if the
Investment Adviser deems it appropriate to do so. There can, of course, be no
assurance that the judgments upon which these techniques are based will be
accurate or that such techniques when applied will be effective. The Fund will
enter into forward commitment arrangements only with respect to securities in
which it may otherwise invest as described under "Investment Objectives and
Policies."
 
     Repurchase Agreements. As described in the Prospectus, the Fund may invest
in securities pursuant to repurchase agreements. Under such agreements, the
seller agrees, upon entering into the contract, to repurchase the security at a
mutually agreed-upon time and price, thereby determining the yield during the
term of the agreement. This results in a fixed rate of return insulated from
market fluctuations during such period. 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. 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. Instead of the
contractual fixed rate of return, the rate of return to the Fund will be
dependent upon 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. From
time to time, the Fund also may invest in securities pursuant to purchase and
sale contracts. While the substance of purchase and sale contracts is similar to
repurchase agreements, because of the different treatment with respect to
accrued interest and additional collateral, management believes that purchase
and sale contracts are not repurchase agreements as such term is understood in
the banking and brokerage community. As a matter of operating policy, the Fund
will not enter into repurchase agreements or purchase
 
                                        4
<PAGE>   51
 
and sale contracts with greater than seven days to maturity if, at the time of
such investment, more than 10% of the total assets of the Fund would be so
invested.
 
                             MANAGEMENT OF THE FUND
 
TRUSTEES AND OFFICERS
 
   
     The Trustees and officers of the Fund, their ages, principal occupations
for at least the last five years and the public companies for which they serve
as directors are set forth below. Unless otherwise stated, the address of each
Trustee and officer is One Financial Center, 23rd Floor, Boston, Massachusetts
02111-2646.
    
 
     ROBERT W. CROOK (61) -- President and Trustee(1)(2) -- Senior Vice
President of Merrill Lynch Asset Management, L.P. ("MLAM") and of Merrill Lynch
Funds Distributor, Inc. ("MLFD") since 1990 and Vice President of MLAM and MLFD
prior thereto.
 
     A. BRUCE BRACKENRIDGE (67) -- Trustee(2) -- 9 Elm Lane, Bronxville, New
York 10708. Group Executive of J.P. Morgan & Co., Inc. (banking) and Morgan
Guaranty Trust Company from 1979 to 1991 and an employee of J.P. Morgan in
various capacities from 1952 to 1991.
 
     CHARLES C. CABOT, JR. (67) -- Trustee(2) -- One Post Office Square, Boston,
Massachusetts 02119. Partner of the law firm Sullivan & Worcester and associated
with that firm since 1966.
 
     JAMES T. FLYNN (58) -- Trustee(2) -- 340 East 72nd Street, New York, New
York 10021. Chief Financial Officer of J.P. Morgan & Co., Inc. from 1990 to 1995
and an employee of J.P. Morgan in various capacities from 1967 to 1995.
 
     TERRY K. GLENN (57) -- Trustee(1)(2) -- P.O. Box 9011, Princeton, New
Jersey 08543-9011. Executive Vice President of MLAM and FAM since 1983;
Executive Vice President and Director of Princeton Services, Inc. since 1993;
President of MLFD since 1986 and Director thereof since 1991; President of
Princeton Administrators, L.P. since 1988.
 
     GEORGE W. HOLBROOK, JR. (66) -- Trustee(2) -- 107 John Street, Southport,
Connecticut 06490. Managing Partner of Bradley Resources Company (private
investment company) and associated with that firm and its predecessors since
1953; Director of Canyon Resources Corporation (mineral exploration company);
Director of Thoratec Laboratories Corporation (medical device manufacturer).
 
     W. CARL KESTER (46) -- Trustee(2) -- Harvard Business School, Morgan Hall
393, Soldiers Field, Boston, Massachusetts 02163; James R. Williston Professor
of Business Administration of Harvard University Graduate School of business
since 1997, having been MBA Class of 1958 Professor of Business Administration
of Harvard University Graduate School of Business Administration since 1981;
Independent Consultant since 1978.
 
     WILLIAM E. ALDRICH (64) -- Executive Vice President(2) -- Vice President of
MLAM since 1993; Senior Vice President of MLFD since 1990; Vice President of
MLFD prior thereto and a Vice President of FAM since 1981.
 
     MICHAEL J. BRADY (38) -- Senior Vice President(2) -- Vice President of MLAM
since 1993; Vice President of MLFD since 1990 and an employee of MLFD prior
thereto.
 
                                        5
<PAGE>   52
 
     WILLIAM M. BREEN (43) -- Senior Vice President and Assistant
Treasurer(2) -- Vice President of MLAM since 1993 and Vice President of MLFD
since 1990 and Assistant Vice President of MLFD prior thereto.
 
     JAMES J. FATSEAS (41) -- Senior Vice President(2) -- Vice President of MLAM
since 1993; Vice President of MLFD since 1990 and Assistant Vice President of
MLFD prior thereto.
 
   
     JOSEPH T. MONAGLE, JR. (49) -- Senior Vice President(2) -- Senior Vice
President and Department Head of the Global Fixed Income Division of MLAM and
FAM since 1990 and Vice President of MLAM and FAM prior thereto.
    
 
     WILLIAM WASEL (39) -- Senior Vice President(2) -- Vice President of MLAM
since 1993; Vice President of MLFD since 1990 and Assistant Vice President of
MLFD prior thereto.
 
     DONALD C. BURKE (37) -- Vice President(2) -- P.O. Box 9011, Princeton, New
Jersey 08543-9011. First Vice President of MLAM since 1997; Vice President of
MLAM from 1990 to 1997 and Director of Taxation of MLAM since 1990.
 
     ANN CATLIN (36) -- Vice President(2) -- Employee of MLFD since 1986.
 
     DIANA FRANKLAND (62) -- Vice President(2) -- Employee of MLFD since 1979.
 
   
     JAY C. HARBECK (63) -- Senior Vice President(2) -- P.O. Box 9011,
Princeton, New Jersey 08543-9011. First Vice President of MLAM since 1997; Vice
President of MLAM since 1986.
    
 
   
     RALPH A. DECESARE (37) -- Vice President and Portfolio Manager -- Vice
President of MLAM since 1993; Assistant Vice President of MLAM since 1991; and
Credit Analyst of MLAM since 1990.
    
 
     MARK E. MAGUIRE (38) -- Vice President(2) -- Assistant Vice President of
MLFD since 1990 and an employee of MLFD since 1986.
 
     PATRICIA A. SCHENA (40) -- Vice President(2) -- Assistant Vice President of
MLFD since 1990 and an employee of MLFD since 1980.
 
     BARRY F. X. SMITH (32) -- Vice President(2) -- Employee of MLFD since 1987.
 
     KAREN D. YOUNG (33) -- Vice President(2) -- Employee of MLFD since 1982.
 
     DIANNE F. MCDONOUGH (36) -- Vice President(2) -- Employee of MLFD since
1983.
 
     GERALD M. RICHARD (48) -- Treasurer(2) -- P.O. Box 9011, Princeton, New
Jersey 08543-9011. Senior Vice President and Treasurer of MLAM and FAM since
1984; Vice President and Treasurer of MLFD since 1981; Senior Vice President and
Treasurer of Princeton Administrators, Inc. since 1988; Senior Vice President
and Treasurer of Princeton Services, Inc. since 1993.
 
     IRA SHAPIRO(34) -- Secretary -- P.O. Box 9011, Princeton, New Jersey
08543-9011. Director (Legal Advisory) of MLAM since 1997 and attorney associated
with MLAM since 1993. Prior to 1993, Mr. Shapiro was an attorney in private
practice.
- ---------------
(1) These Trustees may be deemed to be "interested persons" of the Fund as that
    term is defined in the Investment Company Act of 1940. Mr. Crook and Mr.
    Glenn are officers of MLFD and MLAM.
(2) Director/trustee or officer of certain other investment companies for which
    FAM or MLAM acts as investment adviser.
 
                                        6
<PAGE>   53
 
     Set forth below is a chart showing, for the fiscal year ended October 31,
1997, compensation paid by the Fund to the non-affiliated Trustees and, for the
calendar year ending December 31, 1997, the aggregate compensation paid by all
investment companies advised by MLAM and its affiliate, FAM (collectively, the
"Fund Complex"), to the non-affiliated Trustees. Fees and expenses paid to the
non-affiliated Trustees aggregated $30,000 for the fiscal year ended October 31,
1997.
 
<TABLE>
<CAPTION>
                                                    PENSION OR        AGGREGATE COMPENSATION
                                                RETIREMENT BENEFITS       FROM FUND AND
                                 COMPENSATION     ACCRUED AS PART        FAM/MLAM ADVISED
NAME OF TRUSTEE                   FROM FUND      OF FUND EXPENSES     FUNDS PAID TO TRUSTEES
- -----------------                ------------   -------------------   ----------------------
<S>                              <C>            <C>                   <C>
A. Bruce Brackenridge(1).......     $6,000              None                 $36,000 
Charles C. Cabot, Jr.(1).......      6,000              None                  36,000 
James T. Flynn(1)..............      6,000              None                  36,000 
George W. Holbrook(1)..........      6,000              None                  36,000 
W. Carl Kester(1)..............      6,000              None                  36,000 
</TABLE>
 
- ---------------
(1) In addition to the Fund, the Trustees serve on other FAM/MLAM Advised Funds
    as follows: Mr. Brackenridge (2) registered investment companies consisting
    of (6) portfolios; Mr. Cabot (2) registered investment companies consisting
    of (6) portfolios; Mr. Flynn (2) registered investment companies consisting
    of (6) portfolios; Mr. Holbrook (2) registered investment companies
    consisting of (6) portfolios; and Mr. Kester (2) registered investment
    companies consisting of (6) portfolios.
 
   
     At January 1, 1998, the officers and trustees of the Fund as a group
(twenty-five persons) owned an aggregate of less than 1% of the outstanding
shares of common stock of Merrill Lynch & Co., Inc. ("ML & Co.") and owned less
than 1% of the outstanding shares of the Fund.
    
 
     The trustees have an Audit and Nominating Committee, the members of which
are Messrs. Brackenridge, Cabot, Flynn, Holbrook and Kester.
 
     Each Trustee who is not an officer or employee of ML & Co. or its
subsidiaries will be paid $6,000 annually in his capacity as Trustee. All
Trustees will be reimbursed for any expenses incurred in attending meetings of
the Board of Trustees of the Fund or of any committee thereof. No officer or
employee of ML & Co. or its subsidiaries will receive any compensation from the
Fund for acting as a Trustee or officer of the Fund.
 
MANAGEMENT AND INVESTMENT ADVISORY ARRANGEMENTS
 
     The Investment Adviser (MLAM) acts as the investment adviser for the Fund
and provides the Fund with management services. The Investment Adviser (the
general partner of which is Princeton Services Inc., a wholly owned subsidiary
of ML & Co.) is itself a wholly owned affiliate of ML & Co. and has its
principal place of business at 800 Scudders Mill Road, Plainsboro, New Jersey
08536. ML & Co. has its principal place of business at 250 Vesey Street, New
York, New York 10281.
 
     The Investment Adviser is a limited partnership, the partners of which are
ML & Co. and Princeton Services. ML & Co. and Princeton Services are
"controlling persons" of the Investment Adviser as defined under the Investment
Company Act because of their ownership of its voting securities or their power
to exercise a controlling influence over its management or policies. Similarly,
the following entities may be considered "controlling persons" of MLAM U.K.:
Merrill Lynch Europe Limited (MLAM U.K.'s parent), a
 
                                        7
<PAGE>   54
 
subsidiary of ML International Holdings, a subsidiary of Merrill Lynch
International, Inc., subsidiary of ML & Co.
 
     The Investment Adviser has entered into a sub-advisory agreement (the
"Sub-Advisory Agreement") with MLAM U.K., an indirect, wholly owned subsidiary
of ML & Co. and an affiliate of the Investment Adviser, pursuant to which the
Investment Adviser pays MLAM U.K. a fee for providing investment advisory
services to the Investment Adviser with respect to the Fund in an amount to be
determined from time to time by the Investment Adviser and MLAM U.K. but in no
event in excess of the amount that the Investment Adviser actually receives for
providing services to the Fund pursuant to the Investment Advisory Agreement.
The address of the sub-adviser is Milton Gate, 1 Moor Lane, London EC2Y 9HA,
England.
 
     Pursuant to the terms of the Investment Advisory Agreement, the Investment
Adviser, subject to the general supervision of the Trustees of the Fund and in
conformance with the stated policies of the Fund, renders investment supervisory
and administrative services to the Fund. In this regard, it is the
responsibility of the Investment Adviser to make investment decisions for the
Fund and to place the purchase and sale orders for the portfolio transactions of
the Fund. In addition the Investment Adviser performs, or supervises the
performance of, administrative services in connection with the Fund, including
(i) supervision of all aspects of the Fund's administration and operations,
including processing services related to the purchase and redemption of Fund
shares, the general handling of shareholder relations, and portfolio management;
(ii) providing the Fund, at the Investment Adviser's expense, with the services
of persons competent to perform such administrative and clerical functions as
are necessary in order to provide effective administration of the Fund; and
(iii) providing the Fund, at the Investment Adviser's expense, with adequate
office space and related services. The Investment Adviser may arrange for the
provision of these administrative services and functions by MLFD or another
affiliate of ML & Co.
 
     The Investment Advisory Agreement obligates the Investment Adviser to pay
all compensation of and furnish office space for officers and employees of the
Fund connected with investment and economic research, trading and investment
management of the Fund, as well as compensation of all Trustees of the Fund who
are affiliated persons of ML & Co. or any of its subsidiaries. The Fund pays all
other expenses incurred in the operation of the Fund including, among other
things, taxes, expenses for legal and auditing services, costs of printing
proxies, stock certificates, shareholder reports, prospectuses and statements of
additional information (except to the extent paid by the Distributor), charges
of the custodian and the transfer agent, expenses of redemption of shares,
Securities and Exchange Commission fees, expenses of registering the shares
under Federal and state securities laws, fees and expenses of unaffiliated
trustees, accounting and pricing costs (including the daily calculation of net
asset value), insurance, interest, brokerage costs, litigation and other
extraordinary or non-recurring expenses, and other expenses properly payable by
the Fund. Accounting services are provided for the Fund by the Investment
Adviser, and the Fund reimburses the Investment Adviser for its costs in
connection with those services. MLFD pays certain of the expenses of the Fund in
connection with the continuous offering of Fund shares. See "Purchase of Shares"
in the Prospectus. Certain distribution expenses will be financed by the Fund
pursuant to the Distribution Plans in compliance with Rule 12b-1 under the
Investment Company Act of 1940. See "Distributor."
 
     As compensation for the services rendered under the Investment Advisory
Agreement, the Fund pays the Investment Adviser a fee, payable monthly, at an
annual rate of 0.40% of the Fund's average daily net assets. For the fiscal
years ended October 31, 1995, 1996 and 1997 the Fund paid investment advisory
fees of $271,378, $231,551 and $152,873, respectively.
 
                                        8
<PAGE>   55
 
DURATION AND TERMINATION
 
     The Investment Advisory Agreement is effective as of October 31, 1986 and,
unless earlier terminated as described below, will continue in effect from year
to year if approved annually (a) by the Board of Trustees of the Fund or by a
majority of the outstanding shares of the Fund, and (b) by a majority of the
trustees who are not parties to that contract or interested persons (as defined
in the Investment Company Act of 1940) of any such party. The Investment
Advisory Agreement will terminate automatically upon its assignment and is
terminable at any time without penalty by the trustees of the Fund or by a vote
of a majority of the Fund's outstanding shares (as defined under "Investment
Restrictions" herein) or by the Investment Adviser on 60 days' written notice to
the other party. The Investment Advisory Agreement was last renewed by the
Fund's Board of Trustees on September 8, 1997.
 
     The investment advisory services of the Investment Adviser to the Fund are
not exclusive under the terms of the Investment Advisory Agreement and the
Investment Adviser is also free to, and does, render such services to others.
 
                        DETERMINATION OF NET ASSET VALUE
 
   
     Reference is made to "Additional Information -- Determination of Net Asset
Value" on page 36 of the Prospectus. The net asset value of the shares of the
Fund is determined once daily by MLAM immediately after the declaration of
dividends as of 15 minutes after the close of business on the New York Stock
Exchange (the "NYSE") (generally 4:00 p.m., New York City time) on days that the
NYSE is open for business and on any other day on which there is sufficient
trading in the Fund's portfolio securities that net asset value might be
materially affected but only if on any such day the Fund is required to sell or
redeem shares. The NYSE is not open for business on the following holidays: New
Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Good Friday, Memorial
Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. The net
asset value per share of the Fund is computed by dividing the sum of the value
of the securities held by the Fund plus any cash or other assets minus all
liabilities by the total number of shares of the Fund outstanding at such time,
rounded to the nearest cent. Expenses, including the investment advisory fee
payable to MLAM and any account maintenance and/or distribution fees payable to
the Distributor, are accrued daily.
    
 
     The per share net asset value of Class A shares generally will be higher
than the per share net asset value of shares of the other classes, reflecting
the daily expense accruals of the account maintenance, distribution and higher
transfer agency fees applicable with respect to Class B and Class C shares and
the daily expense accruals of the account maintenance fees applicable with
respect to Class D shares; moreover, the per share net asset value of Class D
shares generally will be higher than the per share net asset value of Class B
and Class C shares, reflecting the daily expense accruals of the distribution
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.
 
     Portfolio securities that are traded in the over-the-counter market are
valued at the last available bid price as obtained from dealers who make a
market in the securities. Securities with remaining maturities of sixty days or
less are valued at amortized cost, which approximates market value. Securities
and assets for
 
                                        9
<PAGE>   56
 
which market quotations are not readily available are valued at fair value as
determined in good faith by or under the direction of the Board of Trustees of
the Fund.
 
                             PORTFOLIO TRANSACTIONS
 
     Reference is made to "Portfolio Transactions" in the Prospectus.
 
     The obligations in which the Fund invests are traded primarily in the
over-the-counter market but may be traded on an exchange. Where possible, the
Fund will deal directly with the dealers who make a market in the securities
involved except in those circumstances where better prices and execution are
available elsewhere. Such dealers usually are acting as principal for their own
account. On occasion, securities may be purchased directly from the issuer. The
cost of executing portfolio transactions of the Fund will primarily consist of
dealer spreads and underwriting commissions.
 
     Under the Investment Company Act, persons affiliated with the Fund are
prohibited from dealing with the Fund as a principal in the purchase and sale of
securities unless a permissive order allowing such transactions is obtained from
the Securities and Exchange Commission. Since over-the-counter ("OTC")
transactions are usually principal transactions, affiliated persons of the Fund,
including Merrill Lynch, may not serve as dealer in connection with transactions
with the Fund. Affiliated persons of the Fund may serve as broker for the Fund
in OTC transactions conducted on an agency basis. Certain court decisions have
raised questions as to the extent to which investment companies should seek
exemptions under the Investment Company 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.
 
     In placing orders, it is the policy of the Fund to obtain the best net
results taking into account such factors as price (including the applicable
dealer spread), the size, type and difficulty of the transaction involved, the
firm's general execution and operational facilities, the firm's risk in
positioning the securities involved and the firm's provision of supplemental
investment research (such as economic data and market forecasts). Information so
received will be in addition to and not in lieu of the services required to be
performed by the Investment Adviser under its Investment Advisory Agreement, and
the expenses of the Investment Adviser will not necessarily be reduced as a
result of the receipt of such supplemental information. In some cases, the
Investment Adviser may use such supplemental research in providing investment
advice to its other investment advisory accounts. While the Investment Adviser
generally seeks reasonably competitive spreads or commissions, the Fund will not
necessarily be paying the lowest spread or commission available.
 
     Securities held by the Fund may also be held by or be appropriate
investments for other funds for which the Investment Adviser or its affiliates
act as an adviser or by investment advisory clients of the Investment Adviser.
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 purchases or sales of securities for the Fund or other funds for
which they act as investment adviser or for their advisory clients 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 Investment Adviser 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.
 
                                       10
<PAGE>   57
 
PORTFOLIO TURNOVER
 
     The Investment Adviser effects portfolio transactions without regard to
holding period if, in its judgment, such transactions are advisable in light of
a change in circumstances in general market, economic or financial conditions.
As a result of its investment policies, the Fund may engage in a substantial
number of portfolio transactions. The portfolio turnover rate is calculated by
dividing the lesser of the Fund's annual sales or purchases of portfolio
securities (exclusive of purchases or sales of securities whose maturities at
the time of acquisition were one year or less) by the monthly average value of
the securities in the portfolio during the year. High portfolio turnover
involves correspondingly greater transaction costs in the form of dealer spread
and brokerage commissions, which are borne directly by the Fund, and may
increase the percentage of the Fund's distributions which are taxable to
shareholders as ordinary income. For the fiscal years ended October 31, 1996 and
October 31, 1997, the Fund's portfolio turnover rates were 51.44% and 201.55%,
respectively.
 
                               PURCHASE OF SHARES
 
     The Fund issues four classes of shares under the Merrill Lynch Select
Pricing(SM) System: Class A and Class D shares are sold to investors choosing
the initial sales charge alternatives and Class B and Class C shares are sold to
investors choosing the deferred sales charge alternatives. Each Class A, Class
B, Class C and Class D share represents an identical interest in the same
portfolio of investments of the Fund and has the same rights except that Class
B, Class C and Class D shares bear the expenses of the Class B, Class C and
Class D exclusive voting rights with respect to the Rule 12b-1 distribution plan
adopted with respect to such class pursuant to which the distribution and/or
account maintenance 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." Class C shares are available only through the
Exchange Privilege.
 
ALTERNATIVE SALES ARRANGEMENTS
 
     The alternative sales arrangements available for the Fund's shares permit
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 his shares and other relevant circumstances.
Investors should determine whether under their particular circumstances it is
more advantageous to incur an initial sales charge and not be subject to ongoing
charges, as discussed below, or to have the entire initial purchase price
invested in the Fund with the investment thereafter being subject to ongoing
charges.
 
     The Merrill Lynch Select Pricing(SM) System is used by more than 50
registered investment companies advised by MLAM or its affiliate, the Investment
Adviser. Funds advised by MLAM or the Investment Adviser that use the Merrill
Lynch Select Pricing(SM) System are referred to herein as "MLAM-advised mutual
funds."
 
     The Fund has entered into separate distribution agreements (the
"Distribution Agreements") with the Distributor in connection with the
continuous offering of each class of shares. 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
 
                                       11
<PAGE>   58
 
used in connection with the offering to dealers and 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 Investment Advisory Agreement described above.
 
   
INITIAL SALES CHARGE ALTERNATIVES -- CLASS A AND CLASS D SHARES
    
 
     Reduced Sales Charges.  As described generally in the Prospectus, a reduced
sales charge is available for any purchase of Class A or Class D shares of the
Fund in excess of $100,000. 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 (including a pension, profit-sharing or
other employee benefit trust created pursuant to a plan qualified under Section
401 of the Code) although more than one beneficiary is involved. The term
"purchase" also includes purchases by any "company," as that term is defined in
the Investment Company Act, but does not include purchases by any such company
that has not been in existence for at least six months or that 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. The term "purchase" also includes purchases by employee
benefit plans not qualified under Section 401 of the Code, including purchases
by employees or by employers on behalf of employees, by means of a payroll
deduction plan or otherwise, of shares of the Fund. Purchases by such a company
or non-qualified employee benefit plan will qualify for the quantity discounts
discussed above only if the Fund and the Distributor are able to realize
economies of scale in sales effort and sales related expense by means of the
company, employer or plan making the Fund's Prospectus available to individual
investors or employees and forwarding investments by such persons to the Fund
and by any such employer or plan bearing the expense of any payroll deduction
plan.
 
     Right of Accumulation.  Reduced sales charges are applicable through a
right of accumulation under which eligible investors are permitted to purchase
Class A or Class D shares of the Fund subject to 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 any other MLAM-advised mutual fund.
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, and
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
through any dealer aggregating $100,000 or more of Class A 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 by the
Distributor. The Letter of Intention is available only to investors whose
accounts are maintained at the Fund's
 
                                       12
<PAGE>   59
 
Transfer Agent. The Letter of Intention is not a binding obligation to purchase
any amount of Class A or Class D shares, but its execution will result in the
purchaser's 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 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 or 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. The reduced sales
charge applicable to the amount covered by the Letter of Intention will be
applied only to new purchases. If the total amount of shares purchased does not
equal the amount stated in the Letter of Intention, the investor will be
notified and must pay, within 20 days of the expiration of such Letter, the
difference between the sales charge on Class A or Class D shares of the Fund
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 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). The first purchase
under the Letter of Intention must be five percent of the dollar amount of such
Letter. If during the term of such Letter, a purchase brings the total amount
invested to an amount equal to or in excess of the amount indicated in the
Letter, the purchaser will be entitled on that purchase and subsequent purchases
to the reduced percentage sales charge which would be applicable to a single
purchase equal to the total dollar value of the Class A or Class D shares of the
Fund then being purchased under such Letter, but there will be no retroactive
reduction of the sales charges on any previous purchase. The value of any shares
redeemed or otherwise disposed of by the purchaser prior to termination or
completion of the Letter of Intention will be deducted from the total purchases
made under such Letter. An exchange from a MLAM-advised money market fund into
the Fund that creates a sales charge will count toward completing a new or
existing Letter of Intention in 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 to TMA(SM) Managed
Trusts to which Merrill Lynch Trust Company provides discretionary trustee
services at net asset value.
 
     Merrill Lynch Blueprint(SM) Program.  Class D shares of the Fund are
offered to participants in the Merrill Lynch Blueprint(SM) Program
("Blueprint"). In addition, participants in Blueprint who own Class A shares of
the Fund may purchase additional Class A shares of the Fund through Blueprint.
Blueprint is directed to small investors, Group IRAs and participants in certain
affinity groups such as benefit plans, credit unions and trade associations.
Investors placing orders to purchase Class A or Class D shares of the Fund
through Blueprint will acquire such Class A or Class D shares at net asset value
plus a sales charge calculated in accordance with the Blueprint sales charge
schedule (i.e., up to $5,000 at .80%. Purchases of greater than $5,000 will be
at the standard sales charge rate disclosed in the Prospectus). In addition,
Class D shares of the Fund are being offered at net asset value plus a sales
charge of .50% for participants in corporate or group IRA programs placing
orders to purchase their shares through Blueprint. However, services (including
the exchange privilege) available to Class A and Class D shareholders through
Blueprint may differ from those available to other investors in Class A or Class
D shares. Class A and Class D shares are offered at net asset value to
participants in the Merrill Lynch Blueprint(SM)Program through the Merrill Lynch
Directed IRA
 
                                       13
<PAGE>   60
 
Rollover Program ("IRA Rollover Program") available from Merrill Lynch Business
Financial Services, a business unit of Merrill Lynch. The IRA Rollover Program
is available to custodian rollover assets from Employer Sponsored Retirement and
Savings Plans (see definition below) whose Trustee and/or Plan Sponsor offers
the Merrill Lynch Directed IRA Rollover Program. Orders for purchases and
redemptions of Class A or Class D shares of the Fund may be grouped for
execution purposes which, in some circumstances, may involve the execution of
such orders two business days following the day such orders are placed. The
minimum initial purchase price is $100 with a $50 minimum for subsequent
purchases through Blueprint. Minimum initial or subsequent purchase requirements
are waived in connection with automatic investment plans for Blueprint
participants. Additional information concerning purchases through Blueprint,
including any annual fees and transaction charges, is available from Merrill
Lynch, Pierce, Fenner & Smith Incorporated, The Blueprint(SM) Program, P.O. Box
30441, New Brunswick, New Jersey 08989-0441.
 
     Purchase Privileges of Certain Persons.  Trustees of the Fund, directors
and trustees of other MLAM-advised mutual funds, ML & Co. and its subsidiaries
(the term "subsidiaries," when used herein with respect to ML & Co., includes
MLAM, FAM and certain other entities directly or indirectly wholly-owned and
controlled by ML & Co.), and their directors or 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.
 
     The shares of the Fund in existence prior to its reorganization at the
close of business on February 14, 1997 have been reclassified as Class D shares.
Although purchasers of Class D shares generally will be subject to a 1% initial
sales charge, those shareholders of the Fund who have held shares of the Fund
since prior to its reorganization at the close of business on February 14, 1997,
will not be subject to any sales charge with respect to either their
reclassified Class D shares or any Class D shares that they may purchase in the
future.
 
     Closed-End Fund 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 Investment
Adviser or MLAM who purchased such closed-end fund shares prior to October 21,
1994 (the date the Merrill Lynch Select Pricing(SM) System commenced operations)
and wish to reinvest the net proceeds from a sale of their closed-end fund
shares of common stock in Eligible Class A Shares of the Fund. 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"). In order to exercise this investment option, closed-end fund
shareholders must (i) sell their closed-end fund shares through Merrill Lynch
and reinvest the proceeds immediately in the Eligible Class A or Class D Shares
of the Fund, (ii) either have acquired the shares in the closed-end fund's
initial public offering or through reinvestment of dividends earned on shares
purchased in such offering, (iii) have maintained their closed-end fund shares
continuously in a Merrill Lynch account, and (iv) purchase a minimum of $250
worth of Fund shares. 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
 
                                       14
<PAGE>   61
 
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 fund in connection with a tender offer
conducted by the eligible fund and reinvest the proceeds immediately in the
designated class of shares of the Fund. This investment option is available only
with respect to eligible shares as to which no Early Withdrawal Charge or CDSC
(each as defined in the eligible fund's prospectus) is applicable. Purchase
orders from eligible fund shareholders wishing to exercise this investment
option will be accepted only on the day that the related tender offer terminates
and will be effected at the net asset value of the designated class of the Fund
on such day.
 
     Class D shares of the Fund are offered at the net asset value, without
sales charge, to an investor who has a business relationship with a Merrill
Lynch Financial Consultant and who has invested in a mutual fund 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 he or she will
purchase Class D shares of the Fund with proceeds from a redemption of such
shares of other mutual funds and that such shares have been outstanding for a
period of no less than six months. Second, such purchase of Class D shares must
be made within 60 days after the redemption and the proceeds from the redemption
must have been maintained in the interim in cash or a money market fund.
 
     Class D shares of the Fund are also offered at net asset value, without
sales charge, to an investor who has a business relationship with a Merrill
Lynch Financial Consultant and who has invested in a mutual fund sponsored by a
non-Merrill Lynch company for which Merrill Lynch has served as a selected
dealer and where Merrill Lynch has either received or given notice that such
arrangement will be terminated ("notice"), if the following conditions are
satisfied: First, the investor must purchase Class D shares of the Fund with
proceeds from a redemption of shares of such other mutual fund and 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 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 with proceeds from a redemption of shares of a
mutual fund that was sponsored by the financial consultant's previous firm and
imposed a sales charge either at the time of purchase or on a deferred basis.
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.
 
     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 investors.
 
     Acquisition of Certain Investment Companies.  The public offering price of
Class D shares of the Fund 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 in appropriate cases be adjusted to reduce possible adverse tax consequences
to the Fund which might result from an acquisition of assets having net
unrealized appreciation which is disproportionately higher at the time of
acquisition than the realized or unrealized appreciation of the Fund.
 
                                       15
<PAGE>   62
 
     The issuance of Class D shares for consideration other than cash is limited
to bona fide reorganizations, statutory mergers or other acquisitions of
portfolio securities which (i) meet the investment objectives and policies of
the Fund; (ii) are acquired for investment and not for resale (subject to the
understanding that the disposition of the Fund's portfolio securities shall at
all times remain within its control); and (iii) are liquid securities, the value
of which is readily ascertainable, which are not restricted as to transfer
either by law or liquidity of market (except that the Fund may acquire through
such transactions restricted or illiquid securities to the extent the Fund does
not exceed the applicable limits on acquisition of such securities set forth
under "Investment Objective and Policies" herein).
 
     Reductions in or exemptions from the imposition of a sales charge are due
to the nature of the investors and/or the reduced sales efforts that will be
needed in obtaining such investments.
 
EMPLOYER-SPONSORED RETIREMENT OR SAVINGS PLANS AND CERTAIN OTHER ARRANGEMENTS
 
     Certain employer-sponsored retirement or savings plans and certain other
arrangements may purchase Class A or Class D shares at net asset value, based on
the number of employees or number of employees eligible to participate in the
plan, the aggregate amount invested by the plan in specified investments and/or
the services provided by Merrill Lynch to the plan. Certain other plans may
purchase Class B shares with a waiver of the CDSC upon redemption, based on
similar criteria. Such Class B shares will convert into Class D shares
approximately ten years after the plan purchases the first share of any
MLAM-advised mutual fund. Minimum purchase requirements may be waived or varied
for such plans. Additional information regarding purchases by employer-sponsored
retirement or savings plans and certain other arrangements is available toll-
free from Merrill Lynch Business Financial Services at (800) 237-7777.
 
DISTRIBUTION PLANS
 
     Reference is made to "Purchase of Shares -- Deferred Sales Charge
Alternatives -- Class B and Class C Shares -- Distribution Plan" in the
Prospectus for certain information with respect to the separate distribution
plans of the Fund for Class B, Class C and Class D shares pursuant to Rule 12b-1
under the Investment Company Act (each a "Distribution Plan") with respect to
the account maintenance and/or distribution fees paid or payable by the Fund to
the Distributor with respect to such classes.
 
     Payments of the account maintenance fees and/or distribution fees are
subject to the provisions of Rule 12b-1 under the Investment Company 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 Fund, as defined in the Investment Company Act (the
"Independent Trustees"), shall be committed to the discretion of the Independent
Trustees then in office. In approving each Distribution Plan in accordance with
Rule 12b-1, the Independent Trustees concluded that there is reasonable
likelihood that such Distribution Plan will benefit the Fund and its related
class of shareholders. Each Distribution Plan can be terminated at any time,
without penalty, by the vote of a majority of the Independent Trustees or by the
vote of the holders of a majority of the outstanding related class of voting
securities. A Distribution Plan cannot be amended to increase materially the
amount to be spent without the approval of the related class of
 
                                       16
<PAGE>   63
 
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 Fund
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.
 
                              REDEMPTION OF SHARES
 
     The right to redeem shares or to receive payment with respect to any
redemption may only be suspended for any period during which trading on the NYSE
is restricted as determined by the Commission or such Exchange 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. Reference is made
to "Redemption of Shares" in the Prospectus for certain information as to the
redemption and repurchase of Fund shares.
 
     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.
 
REPURCHASE
 
     The Fund will normally accept orders to repurchase 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
on the day received and is received by the Fund from such dealer not later than
30 minutes after the close of business on the NYSE (generally 4:00 p.m., New
York City time), 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 (generally 4:00 p.m., New York City time), in order to
obtain that day's closing price.
 
     For shareholders submitting their shares for repurchase through listed
securities dealers, payment for fractional shares will be made by the Transfer
Agent directly to the shareholder and payment for full shares will be made by
the securities dealer 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 in the Prospectus.
 
REINSTATEMENT PRIVILEGE
 
     Shareholders who have redeemed Class A or Class D shares, including
redemption through repurchase by the Fund, have a privilege to reinstate their
accounts by purchasing Class A or Class D shares, as the case may be, at the net
asset value of such shares without a sales charge up to the dollar amount
redeemed. The reinstatement privilege may be exercised as follows. A notice to
exercise this privilege along with a check for the amount to be reinstated must
be received by 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 Distributor. The reinstatement
will be
 
                                       17
<PAGE>   64
 
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.
 
     If a shareholder disposes of shares within 90 days of their acquisition and
subsequently reacquires shares of the Fund pursuant to the reinstatement
privilege, then the shareholder's tax basis in those shares disposed of will be
reduced to the extent the load charge paid to the Fund upon the shareholder's
initial purchase reduces any load charge such shareholder would have been
required to pay on the subsequent acquisition in absence of the reinstatement
privilege. Instead, such load charge will be treated as an amount paid for the
subsequently acquired shares and will be included in the shareholder's tax basis
for such shares.
 
   
DEFERRED SALES CHARGES -- CLASS B AND CLASS C SHARES
    
 
   
     As discussed in the Prospectus under "Purchase of Shares -- Alternative
Sale Arrangements -- Deferred Sales Charge Alternatives -- Class B and Class C
Shares," while Class B shares redeemed within one year of purchase are subject
to a contingent deferred sales charge under most circumstances, the charge is
waived on redemptions of Class B shares in certain instances including in
connection with certain post-retirement withdrawals from an Individual
Retirement Account ("IRA") or other retirement plan or following the death or
disability of a Class B shareholder. Redemptions for which the waiver applies in
the case of such withdrawals are: (a) any partial or complete redemption in
connection with a distribution following retirement under a tax-deferred
retirement plan or attaining age 59 1/2 in the case of an IRA or other
retirement plan, or part of a series of equal periodic payments (not less
frequently than annually) made for the life (or life expectancy) or any
redemption resulting from the tax-free return of an excess contribution to an
IRA; or (b) any partial or complete redemption following the death or disability
(as defined in the Code) of a Class B shareholder (including one who owns the
Class B shares as joint tenant with his or her spouse), provided the redemption
is requested within one year of the death or initial determination of
disability. The CDSC is also waived for any Class B shares that were acquired
and held at the time of redemption by Employee Access Accounts available through
employers that provide Eligible 401(k) Plans. 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.
    
 
     For the period February 18, 1997 (commencement of operations) to October
31, 1997, the Distributor received CDSCs of $210 with respect to redemption of
Class B shares. 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.
 
     Merrill Lynch Blueprint(SM) Program.  Class B shares are offered to certain
participants in the Merrill Lynch Blueprint(SM) Program ("Blueprint"). Blueprint
is directed to small investors and participants in certain affinity groups such
as trade associations and credit unions. Class B shares are offered through
Blueprint only to members of certain affinity groups. The contingent deferred
sales charge is waived for shareholders who are members of certain affinity
groups at the time orders to purchase Class B shares are placed through
Blueprint. However, services (including the exchange privilege) available to
Class B shareholders through Blueprint may differ from those available to other
Class B investors. Orders for purchases and redemptions of Class B shares may be
grouped for execution purposes which, in some circumstances, may involve the
execution of such orders two business days following the day such orders are
placed. The minimum initial purchase price is $100 with a $50 minimum for
subsequent purchases through Blueprint. Minimum investment amounts are waived in
connection with automatic investment plans for Blueprint participants.
Additional information concerning
 
                                       18
<PAGE>   65
 
these Blueprint programs, including any annual fees or transaction charges, is
available from Merrill Lynch, Pierce, Fenner & Smith Incorporated, The
Blueprint(SM)Program, P.O. Box 30441, New Brunswick, New Jersey 08989-0441.
 
                       DIVIDENDS, DISTRIBUTIONS AND TAXES
 
DIVIDENDS AND DISTRIBUTIONS
 
   
     Reference is made to "Dividends, Distributions and Taxes" on page 27 of the
Prospectus.
    
 
FEDERAL INCOME TAXES
 
     The Fund intends to continue to qualify for the special tax treatment
afforded regulated investment companies ("RICs") under the Internal Revenue Code
of 1986, as amended (the "Code"). As long as it so qualifies, the Fund (but not
its shareholders) will not be subject to Federal income tax on the part of its
net ordinary income and net realized capital gains which it distributes to Class
A, Class B, Class C and Class D shareholders (together, the "shareholders"). The
Fund intends to distribute substantially all of such income.
 
     Dividends paid by the Fund from its ordinary income or from an excess of
net short-term capital gains over net long-term capital losses (together
referred to hereafter as "ordinary income dividends") are taxable to
shareholders as ordinary income. Distributions made from an excess of net
long-term capital gains over net short-term capital losses ("capital gain
dividends") are taxable to shareholders as long-term capital gains, regardless
of the length of time the shareholders has owned Fund shares. Recent legislation
creates additional categories of capital gains taxable at different rates.
Although the legislation does not explain how gain in these categories will be
taxed to shareholders of RICs, it authorizes regulations applying the new
categories of gain and the new rates to sales of securities by RICs. In the
absence of guidance, there is some uncertainty as to the manner in which the
categories of gain and related rates will be passed through to the shareholders
in capital gain dividends. Any loss upon the sale or exchange of Fund shares
held for six months or less, however, will be treated as long-term capital loss
to the extent of any capital gain dividends received by the shareholder.
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). Although the Fund may invest in certain
municipal securities, it is not anticipated that any portion of the dividends
paid by the Fund will qualify for tax-exempt treatment to shareholders.
 
     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.
 
     Some shareholders may be subject to a 31% withholding tax on reportable
dividends, capital gains distributions and redemption payments ("backup
withholding"). Generally, shareholders subject to backup withholding will be
those for whom a certified taxpayer identification number is not on file with
the Fund or who, to the Fund's knowledge, have furnished an incorrect number.
When establishing an account, an investor
 
                                       19
<PAGE>   66
 
must certify under penalties of perjury that such number is correct and that he
is not otherwise subject to backup withholding.
 
     Dividends and interest received by the Fund may give rise to withholding
and other taxes imposed by foreign countries. Tax conventions between certain
countries and the United States may reduce or eliminate such taxes.
 
     No gain or loss will be recognized by Class B shareholders on the
conversion of their Class B shares for 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 of the converted Class B 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.
 
     The Code imposes a 4% nondeductible excise tax on a regulated investment
company, such as the Fund, if it does not distribute to its shareholders during
the calendar year an amount equal to 98 percent of the Fund's investment company
income, with certain adjustments, for such calendar year, plus 98 percent of the
Fund's capital gain net income for the one-year period ending on October 31, of
such calendar year. In addition, an amount equal to any undistributed investment
company taxable income or capital gain net income from the previous calendar
year must also be distributed to avoid the excise tax. While the Fund intends to
distribute its income and capital gains in the manner necessary to avoid
imposition of the 4% excise tax, there can be no assurance that sufficient
amounts of the Fund's taxable income and capital gains will be distributed to
avoid entirely the imposition of the tax. The excise tax is imposed on the
amount by which the regulated investment company does not meet the foregoing
distribution requirements.
 
     Only dividends paid by the Fund which are attributable to dividends
received by the Fund will qualify for the 70% dividends-received deduction for
corporations. In addition, corporate shareholders must have held their shares in
the Fund for more than 45 days to qualify for the deduction on dividends paid by
the Fund. Because most of the Fund's income will be interest income, rather than
dividends on common or preferred stock, it is unlikely that any substantial
proportion of its distributions will be eligible for the dividends-received
deduction available for corporations under the Code.
 
     At October 31, 1997, the Fund had a net capital loss carry-forward of
approximately $11,717,000 ($4,643,000 expires in 1998, $3,224,000 expires in
2002, $1,995,000 expires in 2003, $977,000 expires in 2004 and $878,000 expires
in 2005), which will be available to offset like amounts of any future taxable
gains. Expired capital loss carryforward in the amount of $5,830,193 has been
reclassified to paid-in capital in excess of par.
 
     Dividends to shareholders who are nonresident aliens, trusts, estates,
partnerships or corporations may be subject to a 30% United States withholding
tax unless a reduced rate of withholding is provided under an applicable tax
treaty. Shareholders who are nonresident aliens or foreign entities are urged to
consult their own tax advisers concerning the applicability of the United States
withholding tax.
 
     The foregoing is a general and abbreviated summary of the applicable
provisions of the Code and Treasury Regulations presently in effect. For the
complete provisions, reference should be made to the
 
                                       20
<PAGE>   67
 
pertinent sections of the Code and the Treasury Regulations promulgated
thereunder. The Code and Regulations are subject to change by legislative or
administrative action.
 
                              SHAREHOLDER SERVICES
 
     The Fund offers a number of shareholder services described below which are
designed to facilitate investment in its shares. Full details as to each of such
services and copies of the various plans described below can be obtained from
the Fund, the Distributor or Merrill Lynch. Certain of these services are
available only to U.S. investors.
 
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 reinvestment of ordinary
income dividends and long-term capital gains distributions. A shareholder may
make additions to his Investment Account at any time by mailing a check directly
to the Fund's Transfer Agent.
 
     Share certificates are issued only for full shares and only upon the
specific request of the shareholder. 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 Fund's Transfer Agent.
 
     Shareholders considering transferring their Class A shares from Merrill
Lynch to another brokerage firm or financial institution should be aware that,
if the firm to which the Class A or Class D shares are to be transferred will
not take delivery of shares of the Fund, a shareholder either must redeem the
Class A or Class D shares (paying any applicable CDSC) so that the cash proceeds
can be transferred to the account at the new firm or such shareholder must
continue to maintain an Investment Account at the Transfer Agent for those Class
A or Class D shares. Shareholders interested in transferring their Class B or
Class C shares from Merrill Lynch and who do not wish to have an Investment
Account maintained for such shares at the transfer agent may request their new
brokerage firm to maintain such shares in an account registered in the name of
the brokerage firm for the benefit of the shareholder at the transfer agent. If
the new brokerage firm is willing to accommodate the shareholder in this manner,
the shareholder must request that he or she be issued certificates for his
shares, and then must turn the certificates over to the new firm for
re-registration as described in the preceding sentence. Shareholders considering
transferring a tax-deferred retirement account such as an individual retirement
account from Merrill Lynch to another brokerage firm or financial institution
should be aware that, if the firm to which the retirement account is to be
transferred will not take delivery of shares of the Fund, a shareholder must
either redeem the 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 a retirement account with Merrill Lynch for those shares.
 
                                       21
<PAGE>   68
 
AUTOMATIC INVESTMENT PLANS
 
   
     A shareholder may make additions to an Investment Account (as described in
the Prospectus under "Shareholder Services -- Investment Account" on p. 30) at
any time by purchasing Class A shares (if he or she is an eligible Class A
investor as described in the Prospectus) or Class B or Class D shares at the
applicable public offering price either through the shareholder's securities
dealer or by mail directly to the Fund's Transfer Agent, acting as agent for
such securities dealer. Voluntary accumulation also can be made through a
service known as the Fund's Automatic Investment Plan whereby the Fund is
authorized through pre-authorized checks or automated clearing house debits of
$50 or more to charge the regular bank account of the shareholder on a regular
basis to provide systematic additions to the Investment Account of such
shareholder. For investors who buy shares of the Fund through Blueprint no
minimum charge to the investors' bank accounts is required. An investor whose
shares of the Fund are held within a CMA(R) or CBA(R) account may arrange to
have periodic investments made in the Fund in amounts of $100 or more ($1 for
retirement accounts) through the CMA(R)/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.
 
AUTOMATIC REINVESTMENT OF DIVIDENDS AND CAPITAL GAINS DISTRIBUTIONS
 
     Unless specific instructions to the contrary are given as to the method of
payment of dividends and capital gains distributions, dividends and
distributions will be reinvested automatically 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 of the dividend or distribution.
Shareholders may elect in writing to receive either their 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 the
shareholder's account is maintained with Merrill Lynch or notify the Transfer
Agent in writing or by telephone (1-800-MER-FUND) that they no longer wish to
have their dividends and/or distributions reinvested in shares of the Fund or
vice versa, and
 
                                       22
<PAGE>   69
 
commencing ten days after receipt by the transfer agent of such notice, those
instructions will be effected. 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.
 
SYSTEMATIC WITHDRAWAL PLANS
 
     A shareholder of the Fund may elect to receive systematic withdrawal
payments from an Investment Account of Class A, Class B, Class C or Class D
shares in the form of payments by check or through automatic payment by direct
deposit to his bank account 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 upon the current net asset value, 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 Class A, Class B, Class
C or Class D shares are redeemed from those on deposit in the shareholder's
account to provide the withdrawal payment specified by the shareholder. The
shareholder may specify either the dollar amount and class of shares to be
redeemed. Redemptions will be made at net asset value as determined once by MLAM
immediately after the declaration of dividends as of 15 minutes after the close
of business on the NYSE (generally 4:00 p.m., New York City 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 of 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 shares
of the Fund. A shareholder's Systematic Withdrawal Plan may be terminated at any
time, without charge or penalty, by the shareholder, the Fund, the Transfer
Agent or the Distributor.
    
 
     Withdrawal payments should not be considered as dividends, yields or
income. Each withdrawal is a taxable event. If periodic withdrawals continuously
exceed reinvested dividends, the shareholder's original investment may be
correspondingly reduced. Purchases of additional shares concurrent with
withdrawals are ordinarily disadvantageous to the shareholder because of sales
charges and tax liabilities. The Fund 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 from which the shareholder has elected to make systematic
withdrawals.
 
     Alternatively, a shareholder whose shares are held within a CMA(R), CBA(R)
or Retirement Account may elect to have shares redeemed on a monthly, bimonthly,
quarterly, semiannual or annual basis through the CMA(R)/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
five 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
 
                                       23
<PAGE>   70
 
business day. The CMA(R)/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)/CBA(R) Systematic
Redemption Program, eligible shareholders should contact their Merrill Lynch
Financial Consultant.
 
     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." 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 B 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.
 
                                RETIREMENT PLANS
 
     Self-directed individual retirement accounts and other retirement plans are
available from Merrill Lynch. Under these plans, investments may be made in the
Fund and certain of the other mutual funds sponsored by Merrill Lynch as well as
in other securities. Merrill Lynch charges an initial establishment fee and an
annual custodial fee for each account. Information with respect to these plans
is available upon request from Merrill Lynch. The minimum initial purchase to
establish any such plan is $100 and the minimum subsequent purchase is $1.
 
  Retirement Plan
 
     Any Retirement Plan which does not meet the qualifications to purchase
Class A or Class D shares at net asset value may purchase Class B shares with a
waiver of the CDSC upon redemption if the following qualifications are met. The
CDSC is waived for any Eligible 401(k) Plan redeeming Class B shares and is also
waived for Class B redemptions from a 401(a) plan qualified under the Code,
provided that each such plan has the same or an affiliated sponsoring employer
as an Eligible 401(k) Plan purchasing Class B shares ("Eligible 401(a) Plan").
Other tax qualified retirement plans within the meaning of Section 401(a) and
403(b) of the Code which are provided specialized services (e.g., plans whose
participants may direct on a daily basis their plan allocations among a menu of
investments) by independent administration firms contracted through Merrill
Lynch may also purchase Class B shares with a waiver of the CDSC. The CDSC is
also waived for any Class B shares which are purchased by an Eligible 401(k)
Plan or Eligible 401(a) Plan and are rolled over into a Merrill Lynch or Merrill
Lynch Trust Company custodied IRA and held in such account at the time of
redemption. The Class B CDSC is also waived for shares purchased by a Merrill
Lynch rollover IRA that was funded by a rollover from a terminated 401(k) plan
managed by the MLAM Private Portfolio Group and held in such account at the time
of redemption. The minimum initial and subsequent purchase requirements are
waived in connection with all the above-referenced Retirement Plans.
 
                                       24
<PAGE>   71
 
                               EXCHANGE PRIVILEGE
 
     U.S. shareholders of each class of shares of the Fund have an exchange
privilege with certain other MLAM-advised mutual funds listed below. Under the
Merrill Lynch Select Pricing(SM) System, Class A shareholders may exchange Class
A shares of the Fund for Class A shares of a second MLAM-advised mutual fund if
the shareholder holds any Class A shares of the second fund in his account in
which the exchange is made at the time of the exchange or is otherwise eligible
to purchase Class A shares of the second fund. If the Class A shareholder wants
to exchange Class A shares for shares of a second MLAM-advised mutual fund, and
the shareholder does not hold Class A shares of the second fund in his account
at the time of the exchange and is not otherwise eligible to acquire Class A
shares of the second fund, the shareholder will receive Class D shares of the
second fund as a result of the exchange. Class D shares also may be exchanged
for Class A shares of a second MLAM-advised mutual fund at any time as long as,
at the time of the exchange, the shareholder holds Class A shares of the second
fund in the account in which the exchange is made or is otherwise eligible to
purchase Class A shares of the second fund. Class B, Class C and Class D shares
will be 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 of the newly acquired
shares of the other Fund as more fully described below. Class A, Class B, Class
C and Class D shares also will be exchangeable for shares of certain
MLAM-advised money market funds as follows: Class A shares may be exchanged for
shares of Merrill Lynch Ready Assets Trust, Merrill Lynch Retirement Reserves
Money Fund (available only for exchange within certain retirement plans),
Merrill Lynch USA 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 charge 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 of the Fund generally may be exchanged into the Class A or
Class D shares of the other funds or into shares of the Class A and Class D
money market funds with or without a reduced sales charge.
 
     In addition, each of the funds with Class B and Class C shares outstanding
("outstanding Class B or Class C shares") offers to exchange its Class B or
Class C shares for Class B or Class C shares, respectively
 
                                       25
<PAGE>   72
 
("new Class B or Class C shares"), of another MLAM-advised mutual fund on the
basis of relative net asset value per Class B or Class C share, without the
payment of any CDSC that might otherwise be due on redemption of the outstanding
shares. Class B shareholders of the fund exercising the exchange privilege will
continue to be subject to the fund's CDSC schedule if such schedule is higher
than the CDSC 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 higher of the fund's CDSC
schedule or the CDSC relating to the Class B shares of the fund from which the
exchange has been made. For purposes of computing the sales load 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% sales load that generally would apply to a
redemption would not apply to the exchange. Two years later the investor may
decide to redeem the Class B shares of Merrill Lynch 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 two
year holding period for the Merrill Lynch Special Value Fund Class B shares, the
investor will be deemed to have held the new Class B shares for more than four
years.
 
     Shareholders also may exchange shares of the Fund into shares of a money
market fund advised by the Investment Adviser or its affiliates, but the period
of time that Class B or Class C shares are held in a Class B money market fund
will not count towards satisfaction of the holding period requirement for
purposes of reducing the CDSC or with respect to Class B shares, towards
satisfaction of the conversion period. However, shares of a money market fund
which were acquired as a result of an exchange for Class B or Class C shares of
a fund may, in turn, be exchanged back into Class B or Class C shares of any
fund offering such shares, in which event the holding period for Class B or
Class C shares of that 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 Fund's Class B shares for two and a
half years and two 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 which the
shareholder continues to hold for an additional one and a half years, any
subsequent redemption will not incur a CDSC.
 
     To exercise the exchange privilege, shareholders should contact their
Merrill Lynch Financial Consultant who will advise the Fund of the exchange.
Before effecting an exchange, shareholders should obtain a currently effective
prospectus of the fund into which the exchange is to be made. Shareholders of
the Fund, and shareholders of the other funds described above with shares for
which certificates have not been issued, may exercise the exchange privilege by
wire through their securities dealers. The Fund reserves the right to require a
properly completed Exchange Application. This exchange privilege may be modified
or terminated in accordance with the rules of the SEC. 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.
 
                                       26
<PAGE>   73
 
                                PERFORMANCE DATA
 
     From time to time the Fund may include its average annual total return and
other total return data, as well as yield, in advertisements or information
furnished to present or prospective shareholders. Total return and yield figures
are based on the Fund's historical performance and are not intended to indicate
future performance. Average annual total return and yield are determined
separately for Class A, Class B, Class C and Class D shares in accordance with
formulas specified by the SEC and take into account the maximum applicable sales
charge.
 
     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 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) the rates of return calculated will not be average annual rates,
but rather, actual annual, annualized or aggregate rate of return and (2) the
maximum applicable sales charge 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 charge, 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.
 
   
     Set forth on the next page is total return information relating to the
periods prior and subsequent to the reorganization of the Fund. In connection
with its reorganization at the close of business on February 14, 1997, the Fund
changed its investment objective from investing only in assets which would
permit shares of the Fund to qualify both as "liquid assets" under the
regulations of the Office of Thrift Supervision and as an investment permitted
by the regulations of the National Credit Union Association to seeking the
highest possible current income consistent with the protection of capital
afforded by investing in intermediate-term debt securities issued or guaranteed
by the U.S. Government, its agencies or instrumentalities with a maximum
maturity not to exceed fifteen years and, under normal market conditions, a
dollar-weighted average maturity of six to eight years. For the period from the
commencement of the Fund's operations through its reorganization at the close of
business on February 14, 1997, the portfolio of the Fund consisted primarily of
securities issued by the U.S. government and its agencies and instrumentalities.
The average maturity of the Fund's portfolio during this period (generally
ranging from two to five years) has been somewhat shorter than the average
maturity of the Fund of six to eight years following the change in its
investment objective upon its reorganization. As a result, the financial
information in the table below for
    
 
                                       27
<PAGE>   74
 
operations of the Fund prior to its reorganization may not be indicative of its
performance following its reorganization.
 
   
<TABLE>
<CAPTION>
                                                                                REDEEMABLE VALUE OF
PRIOR TO THE REORGANIZATION ON FEBRUARY 14, 1997           EXPRESSED AS A         A HYPOTHETICAL
- ----------------------------------------------------   PERCENTAGE BASED ON A     $1,000 INVESTMENT
                                                        HYPOTHETICAL $1,000        AT THE END OF
                       PERIOD                                INVESTMENT             THE PERIOD
                                                       ----------------------   -------------------
- ----------------------------------------------------
                                                               AVERAGE ANNUAL TOTAL RETURN
<S>                                                    <C>                      <C>
One Year Ended February 14, 1997....................                    3.15%        $1,031.50
Five Years Ended February 14, 1997..................                    5.76%        $1,323.60
Ten Years Ended February 14, 1997...................                    6.90%        $1,950.70
                                                                                ANNUAL TOTAL RETURN
One Year Ended October 31, 1996.....................                    4.87%        $1,048.70
One Year Ended October 31, 1995.....................                    9.00%        $1,090.00
One Year Ended October 31, 1994.....................                  (1.54)%        $  984.60
One Year Ended October 31, 1993.....................                    8.07%        $1,080.70
One Year Ended October 31, 1992.....................                    9.66%        $1,096.60
One Year Ended October 31, 1991.....................                   12.62%        $1,126.20
One Year Ended October 31, 1990.....................                    7.75%        $1,077.50
One Year Ended October 31, 1989.....................                    9.12%        $1,091.20
One Year Ended October 31, 1988.....................                    7.29%        $1,072.90
Inception (November 6, 1986) to October 31, 1987....                    3.18%        $1,031.80
                                                                             AGGREGATE TOTAL RETURN
Inception (November 6, 1986) to February 14, 1997...                   98.52%        $1,985.20
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                REDEEMABLE VALUE OF
                   CLASS A SHARES                          EXPRESSED AS A         A HYPOTHETICAL
- ----------------------------------------------------   PERCENTAGE BASED ON A     $1,000 INVESTMENT
                                                        HYPOTHETICAL $1,000        AT THE END OF
                       PERIOD                                INVESTMENT             THE PERIOD
                                                       ----------------------   -------------------
- ----------------------------------------------------           AVERAGE ANNUAL TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
<S>                                                    <C>                      <C>
Inception (February 18, 1997) to October 31, 1997...                    5.75%        $1,039.90
                                                                                ANNUAL TOTAL RETURN
                                                       (EXCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (February 18, 1997) to October 31, 1997...                    5.04%        $1,050.40
                                                                             AGGREGATE TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (February 18, 1997) to October 31, 1997...                    3.99%        $1,039.90
</TABLE>
    
 
                                       28
<PAGE>   75
 
   
<TABLE>
<CAPTION>
                                                                                REDEEMABLE VALUE OF
                   CLASS B SHARES                          EXPRESSED AS A         A HYPOTHETICAL
- ----------------------------------------------------   PERCENTAGE BASED ON A     $1,000 INVESTMENT
                                                        HYPOTHETICAL $1,000        AT THE END OF
                       PERIOD                                INVESTMENT             THE PERIOD
                                                       ----------------------   -------------------
- ----------------------------------------------------           AVERAGE ANNUAL TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
<S>                                                    <C>                      <C>
Inception (February 18, 1997) to October 31, 1997...                    5.50%        $1,038.10
                                                                                ANNUAL TOTAL RETURN
                                                       (EXCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (February 18, 1997) to October 31, 1997...                    4.81%        $1,048.10
                                                                             AGGREGATE TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (February 18, 1997) to October 31, 1997...                    3.81%        $1,038.10
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                REDEEMABLE VALUE OF
                   CLASS C SHARES                          EXPRESSED AS A         A HYPOTHETICAL
- ----------------------------------------------------   PERCENTAGE BASED ON A     $1,000 INVESTMENT
                                                        HYPOTHETICAL $1,000        AT THE END OF
                       PERIOD                                INVESTMENT             THE PERIOD
                                                       ----------------------   -------------------
- ----------------------------------------------------           AVERAGE ANNUAL TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
<S>                                                    <C>                      <C>
Inception (February 18, 1997) to October 31, 1997...                    5.16%        $1,035.70
                                                                                ANNUAL TOTAL RETURN
                                                       (EXCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (February 18, 1997) to October 31, 1997...                    4.57%        $1,045.70
                                                                             AGGREGATE TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (February 18, 1997) to October 31, 1997...                    3.57%        $1,035.70
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                REDEEMABLE VALUE OF
                   CLASS D SHARES                          EXPRESSED AS A         A HYPOTHETICAL
- ----------------------------------------------------   PERCENTAGE BASED ON A     $1,000 INVESTMENT
                                                        HYPOTHETICAL $1,000        AT THE END OF
                       PERIOD                                INVESTMENT             THE PERIOD
                                                       ----------------------   -------------------
- ----------------------------------------------------           AVERAGE ANNUAL TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
<S>                                                    <C>                      <C>
One Year Ended October 31, 1997.....................                    5.53%        $1,055.30
Five Years Ended October 31, 1997...................                    5.12%        $1,283.50
Ten Years Ended October 31, 1997....................                    7.18%        $1,999.70
                                                                                ANNUAL TOTAL RETURN
                                                       (EXCLUDING MAXIMUM APPLICABLE SALES CHARGES)
One Year Ended October 31, 1997.....................                    6.60%        $1,066.00
                                                                             AGGREGATE TOTAL RETURN
                                                       (INCLUDING MAXIMUM APPLICABLE SALES CHARGES)
Inception (November 6, 1986) to October 31, 1997....                  106.32%        $2,063.20
</TABLE>
    
 
     In order to reflect the reduced sales charges applicable to certain
investors, as described under "Purchase of Shares," the total return data quoted
by the Fund in advertisements directed to such investors whose purchases are
subject to reduced sales load, in the case of Class A and Class D shares, or
waiver of the contingent deferred sales charge in the case of Class B and Class
C shares, may take into account the reduced, and not the maximum, sales charge
or may not take into account the contingent deferred sales charge and
 
                                       29
<PAGE>   76
 
therefore may reflect greater total return since, due to the reduced sales
charge, a lower amount of expenses is deducted.
 
     On occasion, the Fund may compare its performance to that of the Standard &
Poor's 500 Composite Stock Price Index, the Value Line Composite Index, the Dow
Jones Industrial Average, or performance data contained in publications such as
Lipper Analytical Services, Inc., Morningstar Publications, Inc., Money
Magazine, U.S. News & World Report, Business Week, CDA Investment Technology,
Inc., Forbes Magazine or Fortune Magazine. As with other performance data,
performance comparisons should not be considered indicative of the Fund's
relative performance for any future period.
 
                             ADDITIONAL INFORMATION
 
ORGANIZATION OF THE FUND
 
   
     The Fund was organized as an unincorporated business trust under the laws
of Massachusetts under the name "Merrill Lynch Institutional Intermediate Fund"
on September 10, 1986. At the close of business on February 14, 1997, the Fund
was reorganized and changed its name to "Merrill Lynch Intermediate Government
Bond Fund." Its executive offices are located at One Financial Center, 23rd
Floor, Boston, Massachusetts 02111-2646 (telephone toll free 800-225-1576).
Under the Declaration of Trust, the Trustees are authorized to issue an
indefinite number of shares of $0.10 par value of one or more classes, and the
Trustees have designated four classes: "Class A Common Stock," "Class B Common
Stock," "Class C Common Stock" and "Class D Common Stock." Each Class A, Class
B, Class C and Class D share of Common Stock has equal voting rights, and each
such issued and outstanding share is entitled to one vote and to participate
equally in dividends and distributions declared by the Fund and in net assets of
the Fund upon liquidation or dissolution remaining after satisfaction of
outstanding liabilities. The shares of the Fund, when issued, will be fully paid
and non-assessable, be freely transferable and have no preference, preemptive,
conversion or similar rights, except that the Class B, Class C and Class D
shares bear certain expenses related to the account maintenance fees associated
with such shares, and Class B and Class C shares bear certain expenses related
to the distribution of such shares. Each class has exclusive voting rights with
respect to matters relating to such account maintenance and distribution
expenditures, as applicable. See "Purchase of Shares." The Trustees are
authorized to divide or combine such shares into a greater or lesser number of
shares and to classify and reclassify the shares of the Fund into additional
classes of Common Stock at a future date. Shares of the Fund outstanding on the
date the Fund was reorganized were reclassified as Class D shares.
    
 
     There will normally be no meetings 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 Declaration of Trust, cause a
meeting of shareholders to be held for the purpose of voting on the removal of
Trustees. Meetings of the shareholders will be called upon written request of
shareholders holding in the aggregate not less than 10% of the outstanding
shares having voting rights. Except as set forth above, the Trustees will
continue to hold office and appoint successor trustees. Shares do not have
cumulative voting rights and the holders of more than 50% of the shares of the
Fund voting for the election of Trustees can elect all of the Trustees of the
Fund if they choose to do so and in such event the holders of the remaining
shares would not be able to elect any Trustees. Holders of shares of the Fund
are entitled to redeem
 
                                       30
<PAGE>   77
 
their shares as set forth under "Redemption of Shares." No amendment may be made
to the Declaration of Trust without the affirmative vote of a majority of the
outstanding shares of the Fund.
 
     The Declaration of Trust establishing the Fund, dated September 10, 1986, 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 of the Fund 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 Fund may be held to any personal
liability, nor may resort be had to their private property for the satisfaction
of any obligation or claim otherwise in connection with the affairs of the Fund
but the Fund's property only shall be liable.
 
     Under a separate agreement Merrill Lynch has granted the Fund the right to
use the "Merrill Lynch" name and has reserved the right to withdraw its consent
to the use of such name by the Fund at any time, or to grant the use of such
name to any other company, and the Fund has granted Merrill Lynch, under certain
conditions, the use of any other name it might assume in the future, with
respect to any corporation organized by Merrill Lynch.
 
COMPUTATION OF OFFERING PRICE PER SHARE
 
   
     Shares of the Fund outstanding at the close of business on February 14,
1997 were reclassified as D shares. The Fund's Class A, Class B and Class C
shares commenced operations on February 18, 1997. The offering price, based on
the Fund's net assets and number of shares, of each class, outstanding as of
October 31, 1997, is calculated as set forth below.
    
 
   
<TABLE>
<CAPTION>
                                                  CLASS A    CLASS B    CLASS C     CLASS D
                                                  --------   --------   -------   -----------
    <S>                                           <C>        <C>        <C>       <C>
    Net Assets..................................  $424,748   $828,851   $46,876   $28,805,315
                                                  ========   ========   =======    ==========
    Number of Shares Outstanding................    43,628     85,109     4,816     2,958,556
                                                  ========   ========   =======    ==========
    Net Asset Value Per Share (net assets
      divided by number of shares
      outstanding)..............................  $   9.74   $   9.74   $  9.73   $      9.74
                                                  ========   ========   =======    ==========
    Sales Charge* (for Class A and Class D
      shares:
         1.00% of offering price (1.01% of net
           asset value per share))..............       .10         **        **           .10
                                                  --------   --------   -------   -----------
    Offering Price..............................  $   9.84   $   9.74   $  9.73   $      9.84
                                                  ========   ========   =======    ==========
</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.
    
 
                              INDEPENDENT AUDITORS
 
     Deloitte & Touche LLP, 117 Campus Drive, Princeton, New Jersey 08540, has
been selected as the independent auditors of the Fund. The selection of
independent auditors is subject to ratification by the shareholders of the Fund.
The independent auditors are responsible for auditing the annual financial
statements of the Fund.
 
                                   CUSTODIAN
 
     The Chase Manhattan Bank, N.A., 4 MetroTech Center, 18th Floor, Brooklyn,
New York 11245 (the "Custodian"), acts as the Custodian of the Fund's assets.
Under its contract with the Fund, the Custodian is
 
                                       31
<PAGE>   78
 
authorized to establish separate accounts in foreign currencies and to cause
foreign securities owned by the Fund to be held in its offices outside the U.S.
and with certain foreign banks and securities depositories. The Custodian is
responsible for safeguarding and controlling the Fund's cash and securities,
handling the receipt and delivery of securities and collecting interest and
dividends on the Fund's investments.
 
                                 TRANSFER AGENT
 
     Merrill Lynch Financial Data Services, Inc., 4800 Deer Lake Drive East,
Jacksonville, Florida 32246-6484 (the "Transfer Agent"), acts as of the Fund'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 Fund--Transfer Agency Services" in the
Prospectus.
 
                                 LEGAL COUNSEL
 
   
     Rogers & Wells LLP, 200 Park Avenue, New York, New York 10166, is counsel
for the Fund.
    
 
                            REPORTS TO SHAREHOLDERS
 
     The fiscal year of the Fund ends on October 31 of each year. The Fund sends
to its shareholders at least semi-annually reports showing the Fund's portfolio
and other information. An annual report, containing financial statements audited
by independent auditors, is sent to shareholders each year. After the end of
each year, shareholders will receive Federal income tax information regarding
dividends and capital gains distributions.
 
                                       32
<PAGE>   79
 
INDEPENDENT AUDITORS' REPORT
 
The Board of Trustees and Shareholders,
Merrill Lynch Intermediate Government Bond Fund
(formerly Merrill Lynch Institutional Intermediate Fund):
 
We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch Intermediate Government Bond Fund
as of October 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 October
31, 1997 by correspondence with the custodian. 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
Intermediate Government Bond Fund as of October 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
   
February 17, 1998
    
 
                                       33
<PAGE>   80

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

SCHEDULE OF INVESTMENTS

<TABLE>
<CAPTION>
                                                                    Face     Interest     Maturity              Value
Issue                                                              Amount      Rate         Date              (Note 1a)

US Government & Agency Obligations--96.7%

<S>                                                              <C>           <C>        <C>              <C>
US Treasury Notes & Bonds                                        $1,000,000     8.875%     2/15/99          $ 1,039,690
                                                                  2,100,000    13.375      8/15/01            2,635,500
                                                                  1,000,000     6.50       5/31/02            1,028,590
                                                                  1,000,000     6.25       8/31/02            1,019,530
                                                                  1,000,000     7.25       5/15/04            1,075,940
                                                                  6,250,000     7.00       7/15/06            6,706,062
                                                                  1,000,000    10.00       5/15/10            1,240,620
=========================================================================================================================
Federal Farm Credit Banks                                         1,000,000     6.27       8/04/04            1,008,590
=========================================================================================================================
Federal Home Loan Banks                                           2,000,000     6.67       5/10/01            2,047,820
                                                                  2,000,000     6.789      2/05/07            2,071,560
=========================================================================================================================
Federal National Mortgage Association                             2,000,000     6.55       9/12/05            2,043,740
                                                                  2,000,000     6.95      11/13/06            2,041,240
                                                                  3,000,000     7.55       3/27/07            3,077,340
=========================================================================================================================
Student Loan Marketing Association                                2,000,000     7.50       3/08/00            2,073,120
=========================================================================================================================
Total US Government & Agency Obligations (Cost--$28,383,723)                                                 29,109,342
=========================================================================================================================

<CAPTION>
Face Amount                                           Short-Term Securities

US Government Agency Obligations*--3.6%

<C>                  <S>                                                                                   <C>
$1,079,000           Federal Home Loan Mortgage Corp., 5.65% due 11/03/1997                                   1,079,000
=========================================================================================================================
Total Short-Term Securities (Cost--$1,079,000)                                                                1,079,000
=========================================================================================================================
Total Investments (Cost--$29,462,723)--100.3%                                                                30,188,342
Liabilities in Excess of Other Assets--(0.3%)                                                                   (82,552)
                                                                                                            -----------
Net Assets--100.0%                                                                                          $30,105,790
                                                                                                            ===========
=========================================================================================================================
</TABLE>

*     Certain US Government Agency Obligations are traded on a discount basis;
      the interest rate shown is the discount rate paid at the time of purchase
      by the Fund.

      See Notes to Financial Statements.


                                         34                     
<PAGE>   81

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

FINANCIAL INFORMATION

Statement of Assets and Liabilities as of October 31, 1997

<TABLE>
<S>                  <C>                                                                        <C>           <C>
Assets:              Investments, at value (identified cost--$29,462,723) (Notes 1a & 1b) ...                  $ 30,188,342
                     Cash....................................................................                           657
                     Receivables:
                       Interest..............................................................    $ 574,773
                       Investment adviser (Note 2)...........................................       83,692
                       Beneficial interest sold..............................................       42,433          700,898
                                                                                                 ---------
                     Prepaid registration fees and other assets (Note 1e)....................                        35,686
                                                                                                               ------------
                     Total assets............................................................                    30,925,583
                                                                                                               ------------
===========================================================================================================================
Liabilities:         Payables:
                       Beneficial interest redeemed..........................................      720,392
                       Dividends to shareholders (Note 1f)...................................       50,737
                       Distributor (Note 2)..................................................        2,869          773,998
                                                                                                 ---------
                     Accrued expenses and other liabilities..................................                        45,795
                                                                                                               ------------
                     Total liabilities.......................................................                       819,793
                                                                                                               ------------
===========================================================================================================================
Net Assets:          Net assets..............................................................                  $ 30,105,790
                                                                                                               ============
===========================================================================================================================
Net Assets           Class A Shares of beneficial interest, $0.10 par value, unlimited
Consist of:          number of shares authorized.............................................                       $ 4,363
                     Class B Shares of beneficial interest, $0.10 par value, unlimited
                     number of shares authorized.............................................                         8,511
                     Class C Shares of beneficial interest, $0.10 par value, unlimited
                     number of shares authorized.............................................                           482
                     Class D Shares of beneficial interest, $0.10 par value, unlimited
                     number of shares authorized.............................................                       295,856
                     Paid-in capital in excess of par........................................                    40,941,628
                     Accumulated realized capital losses on investments--net (Note 5)........                   (11,870,669)
                     Unrealized appreciation on investments--net.............................                       725,619
                                                                                                               ------------
                     Net assets..............................................................                  $ 30,105,790
                                                                                                               ============
===========================================================================================================================
Net Asset Value:     Class A--Based on net assets of $424,748 and 43,628 shares of
                     beneficial interest outstanding.........................................                  $       9.74
                                                                                                               ============
                     Class B--Based on net assets of $828,851 and 85,109 shares of
                     beneficial interest outstanding.........................................                  $       9.74
                                                                                                               ============
                     Class C--Based on net assets of $46,876 and 4,816 shares of
                     beneficial interest outstanding.........................................                  $       9.73
                                                                                                               ============
                     Class D--Based on net assets of $28,805,315 and 2,958,556 shares of
                     beneficial interest outstanding.........................................                  $       9.74
                                                                                                               ============
===========================================================================================================================
</TABLE>

See Notes to Financial Statements.


                                   35
<PAGE>   82

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

FINANCIAL INFORMATION (continued)

Statement of Operations for the Year Ended October 31, 1997

<TABLE>
<S>                  <C>                                                                            <C>           <C>
Investment Income    Interest and amortization of premium and discount earned...................                  $ 2,665,577
(Note 1d):
==============================================================================================================================
Expenses:            Professional fees..........................................................    $ 186,977
                     Investment advisory fees (Note 2)..........................................      152,873
                     Registration fees (Note 1e)................................................      112,576
                     Printing and shareholder reports...........................................       71,721
                     Account maintenance fees--Class D (Note 2).................................       44,667
                     Trustees' fees and expenses................................................       30,000
                     Transfer agent fees--Class D (Note 2)......................................       24,607
                     Accounting services (Note 2)...............................................       14,972
                     Custodian fees.............................................................        8,489
                     Pricing fees...............................................................          808
                     Account maintenance and distribution fees--Class B (Note 2)................          650
                     Transfer agent fees--Class B (Note 2)......................................          228
                     Transfer agent fees--Class A (Note 2)......................................          221
                     Account maintenance and distribution fees--Class C (Note 2)................            4
                     Transfer agent fees--Class C (Note 2)......................................            4
                     Other......................................................................        2,224
                                                                                                    ---------
                     Total expenses before reimbursement........................................      651,021
                     Reimbursement of expenses (Note 2).........................................     (173,116)
                                                                                                    ---------
                     Total expenses after reimbursement.........................................                      477,905
                                                                                                                  -----------
                     Investment income--net.....................................................                    2,187,672
                                                                                                                  -----------
==============================================================================================================================
Realized &           Realized loss from investments--net........................................                   (1,031,827)
Unrealized           Change in unrealized depreciation on investments--net......................                      918,657
Gain (Loss) on                                                                                                    -----------
Investments--Net     Net Increase in Net Assets Resulting from Operations.......................                  $ 2,074,502
(Notes 1d & 3):                                                                                                   ===========
==============================================================================================================================
</TABLE>

See Notes to Financial Statements.


                                   36
<PAGE>   83

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

FINANCIAL INFORMATION (continued)

Statements of Changes in Net Assets

<TABLE>
<CAPTION>
                                                                                                For the Year Ended October 31,
                                                                                                ------------------------------
Increase (Decrease) in Net Assets:                                                                     1997         1996
<S>                  <C>                                                                           <C>          <C>
==============================================================================================================================
Operations:          Investment income--net...........................................             $ 2,187,672  $ 3,591,278
                     Realized loss on investments--net................................              (1,031,827)    (976,648)
                     Change in unrealized appreciation/depreciation on investments--net                918,657       (2,927)
                                                                                                  ------------  -----------
                     Net increase in net assets resulting from operations............                2,074,502    2,611,703
==============================================================================================================================
Dividends to         Investment income--net:
Shareholders           Class A.......................................................                  (14,144)          --
(Note 1f):             Class B.......................................................                  (12,287)          --
                       Class C.......................................................                      (77)          --
                       Class D.......................................................               (2,161,164)  (3,591,278)
                                                                                                  ------------  -----------
                     Net decrease in net assets resulting from dividends to shareholders            (2,187,672)  (3,591,278)
                                                                                                  ------------  -----------
==============================================================================================================================
Beneficial Interest  Net decrease in net assets derived from beneficial interest transactions      (17,062,260) (16,877,924)
Transactions                                                                                      ------------  -----------
(Note 4):
==============================================================================================================================
Net Assets:          Total decrease in net assets....................................              (17,175,430) (17,857,499)
                     Beginning of year...............................................               47,281,220   65,138,719
                                                                                                  ------------  -----------
                     End of year.....................................................             $ 30,105,790  $47,281,220
                                                                                                  ============  ===========
==============================================================================================================================
</TABLE>

See Notes to Financial Statements.


                                   37
<PAGE>   84

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

FINANCIAL INFORMATION (concluded)

Financial Highlights

<TABLE>
<CAPTION>
The following per share data and ratios have been derived                                   For the Period
from information provided in the financial statements.                              Feb. 18, 1997+ to Oct. 31, 1997
                                                                                    -------------------------------
Increase (Decrease) in Net Asset Value:                                                 Class A    Class B    Class C
=========================================================================================================================
<S>                                                                                    <C>         <C>        <C>
Per Share            Net asset value, beginning of period.........................     $   9.66    $   9.66   $   9.66
Operating                                                                              --------    --------   --------
Performance:         Investment income--net........................................         .39         .37        .36
                     Realized and unrealized gain on investments--net..............         .08         .08        .07
                                                                                       --------    --------   --------
                     Total from investment operations.............................          .47         .45        .43
                                                                                       --------    --------   --------
                     Less dividends from investment income--net....................        (.39)       (.37)      (.36)
                                                                                       --------    --------   --------
                     Net asset value, end of period...............................     $   9.74    $   9.74   $   9.73
                                                                                       ========    ========   ========
=========================================================================================================================
Total Investment     Based on net asset value per share...........................        5.04%++     4.81%++    4.57%++
Return:**                                                                              ========    ========   ========
=========================================================================================================================
Ratios to Average    Expenses, net of reimbursement...............................        1.12%*      1.39%*     1.47%*
Net Assets:                                                                            ========    ========   ========
                     Expenses.....................................................        2.08%*      2.42%*     2.64%*
                                                                                       ========    ========   ========
                     Investment income--net........................................       5.95%*      5.69%*     5.55%*
                                                                                       ========    ========   ========
=========================================================================================================================
Supplemental         Net assets, end of period (in thousands).....................     $    425    $    829   $     47
Data:                                                                                  ========    ========   ========
                     Portfolio turnover...........................................      201.55%     201.55%    201.55%
                                                                                       ========    ========   ========
=========================================================================================================================
</TABLE>

<TABLE>
<CAPTION>
                                                                                        Class D
The following per share data and ratios have been derived         --------------------------------------------------
from information provided in the financial statements.                        For the Year Ended October 31,
                                                                  --------------------------------------------------
Increase (Decrease) in Net Asset Value:                              1997      1996      1995      1994       1993
====================================================================================================================
<S>                                                               <C>       <C>       <C>        <C>       <C>
Per Share            Net asset value, beginning of year........   $   9.68  $   9.82  $   9.60   $  10.31  $  10.06
Operating                                                         --------  --------  --------   --------  --------
Performance:         Investment income--net....................        .55       .61       .62        .55       .54
                     Realized and unrealized gain (loss) on
                     investments--net..........................        .06      (.14)      .22       (.71)      .25
                                                                  --------  --------  --------   --------  --------
                     Total from investment operations..........        .61       .47       .84       (.16)      .79
                                                                  --------  --------  --------   --------  --------
                     Less dividends from investment income--net       (.55)     (.61)     (.62)      (.55)     (.54)
                                                                  --------  --------  --------   --------  --------
                     Net asset value, end of year..............   $   9.74  $   9.68  $   9.82   $   9.60  $  10.31
                                                                  ========  ========  ========   ========  ========
====================================================================================================================
Total Investment     Based on net asset value per share........      6.60%     4.87%     9.00%     (1.54%)    8.07%
Return:**                                                         ========  ========  ========   ========  ========
====================================================================================================================
Ratios to Average    Expenses, net of reimbursement............      1.25%      .97%      .96%       .83%      .80%
Net Assets:                                                       ========  ========  ========   ========  ========
                     Expenses..................................      1.69%      .97%      .96%       .83%      .80%
                                                                  ========  ========  ========   ========  ========
                     Investment income--net....................      5.71%     6.19%     6.38%      5.55%     5.34%
                                                                  ========  ========  ========   ========  ========
====================================================================================================================
Supplemental         Net assets, end of year (in thousands)....   $ 28,805  $ 47,281  $ 65,139   $ 81,407  $122,283
Data:                                                             ========  ========  ========   ========  ========
                     Portfolio turnover........................    201.55%    51.44%    47.90%    172.51%   204.80%
                                                                  ========  ========  ========   ========  ========
====================================================================================================================
</TABLE>
*   Annualized.
**  Total investment returns exclude the effects of sales loads.
+   Commencement of operations.
++  Aggregate total investment return.
    See Notes to Financial Statements.


                                       38
<PAGE>   85

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

NOTES TO FINANCIAL STATEMENTS

1. Significant Accounting Policies:

Merrill Lynch Intermediate Government Bond Fund (the "Fund") is registered under
the Investment Company Act of 1940 as a diversified, open-end management
investment company. Effective February 18, 1997, as a result of the approval of
its shareholders, the Fund converted to a multiple class structure. The Fund
offers four classes of shares under the Merrill Lynch Select Pricing(SM) System.
Shares of Class A and Class D are sold with a front-end sales charge. Shares of
Class B and Class C may be subject to a contingent deferred sales charge. All
classes of shares have identical voting, dividend, liquidation and other rights
and the same terms and conditions, except that Class B, Class C and Class D
Shares bear certain expenses related to the account maintenance of such shares,
and Class B and Class C Shares also bear certain expenses related to the
distribution of such shares. Each class has exclusive voting rights with respect
to matters relating to its account maintenance and distribution expenditures.
The following is a summary of significant accounting policies followed by the
Fund.

(a) Valuation of investments--Portfolio securities traded in the
over-the-counter markets are valued at the last available bid price or yield
equivalent as obtained from dealers who make a market in the securities. US
Government securities and securities issued by Federal agencies are traded in
the over-the-counter market. Securities with remaining maturities of sixty days
or less are valued at amortized cost, which approximates market value.

(b) Repurchase agreements--The Fund invests in US Government securities pursuant
to repurchase agreements with a member bank of the Federal Reserve System or a
primary dealer in US Government securities. Under such agreements, the bank or
primary dealer agrees to repurchase the security at a mutually agreed upon time
and price. The Fund takes possession of the underlying securities, marks to
market such securities and, if necessary, receives additions to such securities
daily to ensure that the contract is fully collateralized.

(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 (including amortization of discount and premium) is recognized
on the accrual basis. Realized gains and losses on security transactions are
determined on the identified cost basis.

(e) Prepaid registration fees--Prepaid registration fees are charged to expense
as the related shares are issued.

(f) Dividends and distributions--Dividends from net investment income are
declared daily and paid monthly. Distributions of capital gains are recorded on
the ex-dividend dates.

2. Investment Advisory Agreement and Transactions with Affiliates:

The Fund has entered into an Investment Advisory Agreement with Merrill Lynch
Asset Management, L.P. ("MLAM"). The general partner of MLAM is Princeton
Services, Inc. ("PSI"), an indirect wholly-owned subsidiary of Merrill Lynch &
Co., Inc. ("ML & Co."), which is the limited partner. The Fund has also entered
into a Distribution Agreement and Distribution Plan with Merrill Lynch Funds
Distributor, Inc. ("MLFD" or "Distributor"), a wholly-owned subsidiary of
Merrill Lynch Group, Inc.

MLAM is responsible for the management of the Fund's portfolio and provides the
necessary personnel, facilities, equipment and certain other services necessary
to the operations of the Fund. For such services, the Fund pays a monthly fee at
the annual rate of 0.40% of the average daily net assets of the Fund. For the
year ended October 31, 1997, MLAM earned fees of $152,873, of which $49,284 was
waived. MLAM also reimbursed the Fund for additional expenses of $123,832.

Pursuant to the Distribution Plans adopted by the Fund in accordance with Rule
12b-1 under the Investment Company Act of 1940, the Fund pays the Distributor
ongoing account maintenance and distribution fees. The fees are accrued daily
and paid monthly at


                                       39
<PAGE>   86

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

NOTES TO FINANCIAL STATEMENTS (concluded)

annual rates based upon the average daily net assets of the shares as follows:

                                        Account          Distribution
                                    Maintenance Fee          Fee
- --------------------------------------------------------------------------------
   Class B................             0.25%                0.25%
   Class C................             0.25%                0.25%
   Class D................             0.10%                  --
- --------------------------------------------------------------------------------

This fee is to compensate MLFD for the services it provides and the expenses
borne by MLFD under the Distribution Agreement. As authorized by the Plan, MLFD
has entered into an agreement with Merrill Lynch, Pierce, Fenner & Smith Inc.
("MLPF&S"), which provides for the compensation of MLPF&S for providing
distribution-related services to the Fund. Such services relate to the sale,
promotion, and marketing of the shares of the Fund.

For the year ended October 31, 1997, MLFD earned underwriting discounts and
direct commissions and MLPF&S earned dealer concessions on sales of the Fund's
Class D Shares as follows:

                                         MLFD               MLPF&S
- --------------------------------------------------------------------------------
   Class D...................            $277               $2,461
- --------------------------------------------------------------------------------

For the year ended October 31, 1997, MLPF&S received contingent deferred sales
charge of $210 relating to transactions in Class B Shares.

For the year ended October 31, 1997, the Fund paid Merrill Lynch Security
Pricing Service, an affiliate of MLPF&S, $778 for security price quotations to
compute the net asset value of the Fund.

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

Certain officers and/or trustees of the Fund are officers and/or directors of
MLAM, PSI, MLFD, and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the
year ended October 31, 1997 were $72,841,211 and $88,236,741, respectively.

Net realized and unrealized gains (losses) as of October 31, 1997 were as
follows:

                                            Realized          Unrealized
                                             Losses             Gains
- --------------------------------------------------------------------------------
   Long-term investments......            $(1,031,827)        $ 725,619
                                          -----------         ---------
   Total......................            $(1,031,827)        $ 725,619
                                          ===========         =========
- --------------------------------------------------------------------------------

As of October 31, 1997, net unrealized appreciation for Federal income tax
purposes aggregated $572,260, of which $655,045 related to appreciated
securities and $82,785 related to depreciated securities. The aggregate cost of
investments at October 31, 1997 for Federal income tax purposes was $29,616,082.

4. Transactions in Shares of Beneficial Interest:

Net decrease in net assets derived from beneficial interest transactions was
$17,062,260 and $16,877,924 for the years ended October 31, 1997 and October 31,
1996, respectively.

Transactions in shares of beneficial interest were as follows:

   Class A Shares for the Period
   February 18, 1997+ to                                Dollar
   October 31, 1997                      Shares         Amount
- --------------------------------------------------------------------------------
   Shares sold......................     49,642      $ 467,013
   Shares issued to shareholders
   in reinvestment of dividends ....        124          1,191
                                         ------      ---------
   Total issued.....................     49,766        468,204
   Shares redeemed..................     (6,138)       (58,663)
                                         ------      ---------
   Net increase.....................     43,628      $ 409,541
                                         ======      =========
- --------------------------------------------------------------------------------
 + Commencement of operations.
- --------------------------------------------------------------------------------

   Class B Shares for the Period
   February 18, 1997+ to                                Dollar
   October 31, 1997                      Shares         Amount
- --------------------------------------------------------------------------------
   Shares sold......................    100,605      $ 964,735
   Shares issued to shareholders
   in reinvestment of dividends ....        922          8,835
                                        -------      ---------
   Total issued.....................    101,527        973,570
   Shares redeemed..................    (16,418)      (156,834)
                                        -------      ---------
   Net increase.....................     85,109      $ 816,736
                                        =======      =========
- --------------------------------------------------------------------------------
 + Commencement of operations.
- --------------------------------------------------------------------------------


                                      40
<PAGE>   87

Merrill Lynch Intermediate Government Bond Fund                 October 31, 1997

   Class C Shares for the Period
   February 18, 1997+ to                                Dollar
   October 31, 1997                      Shares         Amount
- --------------------------------------------------------------------------------
   Shares sold......................      4,812      $  46,564
   Shares issued to shareholders
   in reinvestment of dividends ....          4             38
                                          -----      ---------
   Net increase.....................      4,816      $  46,602
                                          =====      =========
- --------------------------------------------------------------------------------
 + Commencement of operations.
- --------------------------------------------------------------------------------

   Class D Shares for the Year                          Dollar
   Ended October 31, 1997                Shares         Amount
- --------------------------------------------------------------------------------
   Shares sold......................    564,311    $  5,452,644
   Shares issued to shareholders
   in reinvestment of dividends ....    192,051       1,843,504
                                     ----------    ------------
   Total issued.....................    756,362       7,296,148
   Shares redeemed.................. (2,681,230)    (25,631,287)
                                     ----------    ------------
   Net decrease..................... (1,924,868)   $(18,335,139)
                                     ==========    ============
- --------------------------------------------------------------------------------

   Class D Shares for the Year                          Dollar
   Ended October 31, 1996                Shares         Amount
- --------------------------------------------------------------------------------
   Shares sold......................  3,906,826    $ 37,917,545
   Shares issued to shareholders
   in reinvestment of dividends ....    310,652       3,023,342
                                     ----------    ------------
   Total issued.....................  4,217,478      40,940,887
   Shares redeemed.................. (5,964,956)    (57,818,811)
                                     ----------    ------------
   Net decrease..................... (1,747,478)   $(16,877,924)
                                     ==========    ============
- --------------------------------------------------------------------------------

5. Capital Loss Carryforward:

At October 31, 1997, the Fund had a net capital loss carryforward of
approximately $11,717,000, of which $4,643,000 expires in 1998, $3,224,000
expires in 2002, $1,995,000 expires in 2003, $977,000 expires in 2004 and
$878,000 expires in 2005. This amount will be available to offset like amounts
of any future taxable gains. Expired capital loss carryforward in the amount of
$5,830,193 has been reclassified to paid-in capital in excess of par.


                                      41
<PAGE>   88
 
                      [THIS PAGE INTENTIONALLY LEFT BLANK]
<PAGE>   89
 
- ------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                     PAGE
<S>                                  <C>
Investment Objectives and
  Policies.........................     2
Investment Restrictions............     2
Management of the Fund.............     5
  Trustees and Officers............     5
  Management and Investment
     Advisory Arrangements.........     7
  Duration and Termination.........     9
Determination of Net Asset Value...     9
Portfolio Transactions.............    10
  Portfolio Turnover...............    11
Purchase of Shares.................    11
  Alternative Sales Arrangements...    11
  Initial Sales Charge
     Alternatives --
     Class A and Class D Shares....    12
  Employer-Sponsored Retirement or
     Savings Plans and Certain
     Other Arrangements............    16
  Distribution Plan................    16
Redemption of Shares...............    17
  Repurchase.......................    17
  Reinstatement Privilege..........    17
  Deferred Sales Charges --
     Class B and Class C Shares....    18
Dividends, Distributions and
  Taxes............................    19
  Dividends and Distributions......    19
  Federal Income Taxes.............    19
Shareholder Services...............    21
  Investment Account...............    21
  Automatic Investment Plans.......    22
  Fee-Based Programs...............    22
  Automatic Reinvestment of
     Dividends and Capital Gains
     Distributions.................    22
  Systematic Withdrawal Plans......    23
Retirement Plans...................    24
Exchange Privilege.................    25
Performance Data...................    27
Additional Information.............    30
  Organization of the Fund.........    30
  Computation of Offering Price Per
     Share.........................    31
Independent Auditors...............    31
Custodian..........................    31
Transfer Agent.....................    32
Legal Counsel......................    32
Reports to Shareholders............    32
Independent Auditors' Report.......    33
Financial Statements...............    34
                        Code # 10432-0298
</TABLE>
    
 
    [Merrill Lynch Logo]
    MERRILL LYNCH
    INTERMEDIATE GOVERNMENT
    BOND FUND
 
                                                          [MLYNCH COMPASS GRAPH]
    STATEMENT OF
 
    ADDITIONAL
    INFORMATION
 
   
    February 18, 1998
    
 
    Distributor:
    Merrill Lynch
    Funds Distributor, Inc.
<PAGE>   90

                   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 IMDATE                                  OR IMAGE IN TEST
- ----------------------                              -------------------
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.

<PAGE>   91
 
                           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 ten-year period
           ended October 31, 1997.
    
 
        Contained in Part B:
 
   
           Schedule of Investments as of October 31, 1997
    
 
   
           Statement of Assets and Liabilities as of October 31, 1997
    
 
           Statement of Operations for the year ended October 31, 1997
 
           Statements of Changes in Net Assets for each of the years in the
           two-year period ended October 31, 1997
 
           Financial Highlights for each of the years in the five-year period
           ended October 31, 1997.
 
     (b) EXHIBITS
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                          DESCRIPTION
- ------       ----------------------------------------------------------------------------------
<C>     <S>  <C>
  1(a)  --   Declaration of Trust (incorporated by reference to Exhibit 1 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
  1(b)  --   Form of Amendment to Declaration of Trust
  2     --   By-Laws of Registrant (incorporated by reference to Exhibit 2 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
  3     --   None.
  4     --   Specimen certificates for Class A, Class B, Class C and Class D shares of
             beneficial interest of Fund (incorporated by reference to Exhibit 4 to
             Post-Effective Amendment No. 12 to Registrant's Registration Statement on Form
             N-1A (File No. 33-8708).
  5     --   Form of Investment Advisory Agreement (incorporated by reference to Exhibit 5 to
             Post-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-1A
             (File No. 33-8708)).
  5(a)  --   Form of Sub-Advisory Agreement between Fund Asset Management, L.P. and Merrill
             Lynch Asset Management U.K. Limited (incorporated by reference to exhibit 5(a) to
             Post-Effective Amendment No. 13 to Registrant's Registration Statement on Form
             N-1A (File No. 33-8708)).
  6(a)  --   Form of Class A Distribution Agreement between Registrant and Merrill Lynch Funds
             Distributor, Inc. (including form of Selected Dealer Agreement) (incorporated by
             reference to Exhibit 6(a) to Post-Effective Amendment No. 10 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
  6(b)  --   Form of Class B Distribution Agreement between Registrant and Merrill Lynch Funds
             Distributor, Inc. (including form of Selected Dealer Agreement) (incorporated by
             reference to Exhibit 6(b) to Post-Effective Amendment No. 10 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
  6(c)  --   Form of Class C Distribution Agreement between Registrant and Merrill Lynch Funds
             Distributor, Inc. (including form of Selected Dealer Agreement) (incorporated by
             reference to Exhibit 6(c) to Post-Effective Amendment No. 10 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
  6(d)  --   Form of Class D Distribution Agreement between Registrant and Merrill Lynch Funds
             Distributor, Inc. (including form of Selected Dealer Agreement) (incorporated by
             reference to Exhibit 6(d) to Post-Effective Amendment No. 10 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
  7     --   None.
  8     --   Form of Custodian Agreement (incorporated by reference to Exhibit 8 to
             Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-1A
             (File No. 33-8708)).
</TABLE>
 
                                       C-1
<PAGE>   92
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                          DESCRIPTION
- ------       ----------------------------------------------------------------------------------
<C>     <S>  <C>
  9(a)  --   Form of Transfer Agency, Dividend Disbursing Agency and Shareholder Servicing
             Agency Agreement between Registrant and Merrill Lynch Financial Data Services,
             Inc. (incorporated by reference to Exhibit 9(a) to Post-Effective Amendment No. 12
             to Registrant's Registration Statement on Form N-1A (File No. 33-8708)).
  9(b)  --   Form of Agreement relating to the use of the "Merrill Lynch" name (incorporated by
             reference to Exhibit 9(b) to Pre-Effective Amendment No. 1 to Registrant's
             Registration Statement on Form N-1A (File No. 33-8708)).
 10     --   Opinion of Counsel. (incorporated by reference to Exhibit 10 to Post-Effective
             Amendment No. 13 to Registrant's Registration Statement on Form N-1A (File No.
             33-8708)).
 11     --   Consent of Deloitte & Touche LLP, independent accountants for the Registrant.*
 12     --   None.
 13(a)  --   None.
 14     --   None.
 15(a)  --   Form of Class B Distribution Plan of Registrant (incorporated by reference to
             Exhibit 15(a) to Post-Effective Amendment No. 10 to Registrant's Registration
             Statement on Form N-1A (File No. 33-8708)).
 15(b)  --   Form of Class C Distribution Plan of Registrant (incorporated by reference to
             Exhibit 15(b) to Post-Effective Amendment No. 10 to Registrant's Registration
             Statement on Form N-1A (File No. 33-8708)).
 15(c)  --   Form of Class D Distribution Plan of Registrant (incorporated by reference to
             Exhibit 15(c) to Post-Effective Amendment No. 10 to Registrant's Registration
             Statement on Form N-1A (File No. 33-8708)).
 16     --   Schedule for computation of each performance quotation provided in the
             Registration Statement in response to Item 22 (incorporated by reference to
             Exhibit 16 to Post-Effective Amendment No. 2 to Registrant's Registration
             Statement on Form N-1A (File No. 33-8708)).
 17     --   None.
 18     --   Form of plan under Rule 18f-3 (incorporated by reference to Exhibit 18 to
             Post-Effective Amendment No. 10 to Registrant's Registration Statement on Form
             N-1A (File No. 33-8708)).
 27(a)  --   Financial Data Schedule -- Class A shares.*
 27(b)  --   Financial Data Schedule -- Class B shares.*
 27(c)  --   Financial Data Schedule -- Class C shares.*
 27(d)  --   Financial Data Schedule -- Class D shares.*
</TABLE>
 
- ---------------
* Filed herewith.
 
ITEM 25. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT.
 
     None.
 
ITEM 26. NUMBER OF HOLDERS OF SECURITIES.
 
<TABLE>
<CAPTION>
                                                                                   NUMBER OF
                                                                                  HOLDERS AT
                               TITLE OF CLASS                                  DECEMBER 31, 1997
- ----------------------------------------------------------------------------   -----------------
<S>                                                                            <C>
Class A common stock, par value $0.10 per share.............................            81
Class B common stock, par value $0.10 per share.............................           105
Class C common stock, par value $0.10 per share.............................            11
Class D common stock, par value $0.10 per share.............................           245
</TABLE>
 
- ---------------
Note: The number of holders shown in the table above includes holders of record
      plus beneficial owners, whose shares are held of record by Merrill Lynch,
      Pierce, Fenner & Smith Incorporated.
 
                                       C-2
<PAGE>   93
 
ITEM 27. INDEMNIFICATION.
 
     Reference is made to Section 5.3 of Registrant's Declaration of Trust.
 
     Insofar as the conditional advancing of indemnification monies for actions
based upon the Investment Company Act of 1940 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 that
amount to which it is ultimately determined that 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 of 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.
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to trustees, officers and controlling persons of the
Registrant pursuant to the foregoing provisions or otherwise, the Registrant has
been advised that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the 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 in
connection with the successful defense of any action, suit or proceeding) is
asserted by such trustee, officer or controlling person in connection with
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 Act and will be governed by the final
adjudication of such issue.
 
ITEM 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER.
 
   
     Merrill Lynch Asset Management, L.P. ("MLAM" or the "Investment Adviser"),
an affiliate of FAM, 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 Growth Fund, Inc.,
Merrill Lynch Global Holdings, 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 Real Estate Fund, Inc., Merrill Lynch Retirement Series Trust, Merrill
Lynch Series Fund, Inc., Merrill Lynch Short-Term Global Income Fund, Inc.,
Merrill Lynch Strategic Dividend Fund, Merrill Lynch Technology Fund, Inc.,
Merrill Lynch U.S.A. Government Reserves, Merrill Lynch U.S. Treasury Money
Fund, Merrill Lynch Utility Income Fund, Inc., and Merrill Lynch Variable Series
Funds, Inc., and Hotchkis and Wiley Funds (advised by Hotchkis and Wiley, a
division of MLAM); and the following closed-end registered investment companies:
Convertible Holdings, Inc., Merrill Lynch High Income Municipal Bond Fund, Inc.,
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 Advisors Trust.
    
 
                                       C-3
<PAGE>   94
 
   
     Fund Asset Management, L.P. ("FAM") acts as the investment adviser for the
following other open-end registered investment companies: CBA Money Fund, CMA
Government Securities Fund, CMA Money Fund, CMA Multi-State Municipal Series
Trust, 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., Corporate
High Yield Fund, III, Inc., Debt Strategies Fund, Inc., Income Opportunities
Fund 1999, Inc., Income Opportunities Fund 2000, 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 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 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 Pennsylvania Fund, MuniYield
Quality Fund, Inc., MuniYield Quality Fund II, Inc., Senior High Income
Portfolio, Inc., Taurus MuniCalifornia Holdings, Inc., Taurus MuniNew York
Holdings, Inc. and Worldwide DollarVest Fund, Inc.
    
 
   
     The address of each of these investment companies is P.O. Box 9011,
Princeton, New Jersey 08543-9011, except that the address of Merrill Lynch Funds
for Institutions Series and Merrill Lynch Intermediate Government Bond Fund is
One Financial Center, 23rd Floor, Boston, Massachusetts 02111-2646. The address
of the Investment Adviser and of Merrill Lynch Funds Distributor, Inc. ("MLFD"),
and MLAM is also P.O. Box 9011, Princeton, New Jersey 08543-9011. 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 10281-1213.
    
 
     Set forth below is a list of each officer and director of the Investment
Adviser indicating each business, profession, vocation or employment of a
substantial nature in which each such person has been engaged since October 31,
1995 for his or her or its own account or in the capacity of director, officer,
partner or trustee. In addition, Messrs. Zeikel, Glenn and Richard hold the same
positions with substantially all of the investment companies described in the
preceding paragraph and Messrs. Giordano, Harvey and Monagle are directors or
officers of one or more of such companies. Messrs. Zeikel and Richard also hold
the same positions with all or substantially all of the investment companies
advised by FAM as they do with the Investment Adviser. Messrs. Harvey and
Monagle are directors or officers of one or more of such companies.
 
<TABLE>
<CAPTION>
                               POSITIONS WITH                 OTHER SUBSTANTIAL BUSINESS,
         NAME                INVESTMENT ADVISER            PROFESSION, VOCATION OR EMPLOYMENT
- -----------------------   -------------------------   --------------------------------------------
<S>                       <C>                         <C>
ML & Co.                  Limited Partner             Financial Services Holding Company; Limited
                                                        Partner of MLAM
Fund Asset Management,    Limited Partner             Investment Advisory Services
  Inc.
Princeton Services,       General Partner             General Partner of MLAM
  Inc. ("Princeton
  Services")
</TABLE>
 
                                       C-4
<PAGE>   95
 
   
<TABLE>
<CAPTION>
                               POSITIONS WITH                 OTHER SUBSTANTIAL BUSINESS,
         NAME                INVESTMENT ADVISER            PROFESSION, VOCATION OR EMPLOYMENT
- -----------------------   -------------------------   --------------------------------------------
<S>                       <C>                         <C>
Arthur Zeikel             President and Director      Chairman of MLAM; President of MLAM and FAM
                                                        (from 1977 to 1997); Chairman and Director
                                                        of Princeton Services; President of
                                                        Princeton Services (from 1993 to 1997);
                                                        Executive Vice President of ML & Co.
Jeffrey M. Peek           President                   President of MLAM since 1997; President and
                                                        Director of Princeton Services since 1997;
                                                        Executive Vice President of ML & Co.
Terry K. Glenn            Executive Vice President    Executive Vice President of MLAM and FAM;
                                                        Executive Vice President and Director of
                                                        Princeton Services; President of MLFD and
                                                        Director thereof; President of Princeton
                                                        Administrators, L.P.
Robert W. Crook           Senior Vice President       Senior Vice President of MLFD; Vice
                                                        President of MLFD and Vice President of
                                                        FAM
Linda L. Federici         Senior Vice President       Senior Vice President of MLAM
Vincent R. Giordano       Senior Vice President       Senior Vice President of MLAM; Senior Vice
                                                        President of Princeton Services
Elizabeth A. Griffin      Senior Vice President       Senior Vice President of MLAM; Senior Vice
                                                        President of Princeton Services
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 President       Senior Vice President, General Counsel and
                            General Counsel, and        Secretary of MLAM; Senior Vice President,
                            Secretary                   General Counsel, Director and Secretary of
                                                        Princeton Services
Ronald M. Kloss           Senior Vice President       Senior Vice President of MLAM; Senior Vice
                                                        President of Princeton Services
Debra Landsman-Yaros...   Senior Vice President       Senior Vice President of MLAM; Vice
                                                      President of MLFD
Stephen M. M. Miller      Senior Vice President       Executive Vice President of Princeton
                                                        Administrator, L.P.; Senior Vice President
                                                        of Princeton Services
Joseph T. Monagle, Jr.    Senior Vice President       Senior Vice President of MLAM; Senior Vice
                                                        President of Princeton Services
Michael L. Quinn          Senior Vice President       Senior Vice President of FAM; Senior Vice
                                                        President of Princeton Services; Managing
                                                        Director and First Vice President of
                                                        Merrill Lynch, Pierce, Fenner & Smith
Richard L. Reller         Senior Vice President       Senior Vice President of MLAM; Senior Vice
                                                        President of Princeton Services and
                                                        Director of MLFD
</TABLE>
    
 
                                       C-5
<PAGE>   96
 
   
<TABLE>
<CAPTION>
                               POSITIONS WITH                 OTHER SUBSTANTIAL BUSINESS,
         NAME                INVESTMENT ADVISER            PROFESSION, VOCATION OR EMPLOYMENT
- -----------------------   -------------------------   --------------------------------------------
<S>                       <C>                         <C>
Gerald M. Richard         Senior Vice President and   Senior Vice President and Treasurer of MLAM;
                            Treasurer                   Senior Vice President and Treasurer of
                                                        Princeton Services; Vice President and
                                                        Treasurer of MLFD
Gregory D. Upah           Senior Vice President       Senior Vice President of MLAM
Ronald L. Welburn         Senior Vice President       Senior Vice President of MLAM; Senior Vice
                                                        President of Princeton Services
</TABLE>
    
 
     Set forth below is a list of each executive officer and director of MLAM
U.K. indicating each business, profession, vocation or employment of a
substantial nature in which each such person has been engaged since July 1,
1995, for his or her own account or in the capacity of director, officer,
partner or trustee. In addition, Messrs. Zeikel, Albert and Richard are officers
of one or more of the registered investment companies listed in the first two
paragraphs of this Item 28:
 
   
<TABLE>
<CAPTION>
                                POSITION WITH                 OTHER SUBSTANTIAL BUSINESS,
         NAME                     MLAM U.K.                PROFESSION, VOCATION OR EMPLOYMENT
- -----------------------   -------------------------   --------------------------------------------
<S>                       <C>                         <C>
Arthur Zeikel             Director and Chairman       Chairman of the Manager and FAM; President
                                                        of the Manager and FAM (from 1977 to
                                                        1997); Chairman and Director of Princeton
                                                        Services; President of Princeton Services
                                                        (from 1993 to 1997); Executive Vice
                                                        President of ML & Co.
 
Alan J. Albert            Senior Managing Director    Vice President of the Manager
 
Terry K. Glenn            Director                    Director of Merrill Lynch Europe PLC;
                                                        General Counsel of Merrill Lynch
                                                        International Private Banking Group
 
Gerald M. Richard         Senior Vice President       Senior Vice President and Treasurer of the
                                                        Manager and FAM; Senior Vice President and
                                                        Treasurer of Princeton Services; Vice
                                                        President and Treasurer of the MLFD
 
Carol Ann Langham         Company Secretary           None
 
Debra Anne Searle         Assistant Company           None
                            Secretary
</TABLE>
    
 
ITEM 29. PRINCIPAL UNDERWRITERS.
 
     (a) Merrill Lynch Funds Distributor, Inc. ("MLFD") acts as the principal
underwriter for the Registrant. MLFD acts as the principal underwriter for each
of the investment companies referred to in Item 28 except Apex Municipal Fund,
Inc., CBA Money Fund, CMA Government Securities Fund, CMA Treasury Fund, CMA
Money Fund, CMA Multi-State Municipal Series Trust, CMA Tax-Exempt Fund, Merrill
Lynch Corporate High Yield Fund, Inc., Merrill Lynch Corporate High Yield Fund
II, Inc., MuniAssets Fund, Inc., MuniEnhanced Fund, Inc., MuniInsured Fund,
Inc., MuniVest Fund, Inc., MuniVest Florida Fund, MuniVest Fund II, Inc.,
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 Insured Fund, Inc., MuniYield Michigan Fund, Inc., MuniYield Michigan
Insured Fund, Inc., MuniYield New Jersey Fund, Inc., MuniYield New Jersey
Insured
 
                                       C-6
<PAGE>   97
 
Fund, Inc., MuniYield New York Insured Fund, Inc., MuniYield New York Insured
Fund II, Inc., MuniYield Pennsylvania Fund, Inc., MuniYield Fund, Inc.,
MuniYield Quality Fund, Inc., MuniYield Quality Fund II, Inc., Senior High
Income Portfolio, Inc., Taurus MuniCalifornia Holdings, Inc., Taurus MuniNew
York Holdings, The Corporate Fund Accumulation Program, Inc., The Municipal Fund
Accumulation Program, Inc., World Wide Dollar Vest, 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 9081,
Princeton, New Jersey 08543-9011, except that the address of Messrs. Crook,
Aldrich, Brady, Breen, Fatseas, Maguire and Wasel and Ms. Schena is One
Financial Center, 23rd Floor, Boston, Massachusetts 02111-2665.
 
   
<TABLE>
<CAPTION>
                                               POSITIONS AND OFFICES         POSITIONS AND OFFICES
                  NAME                           WITH UNDERWRITER               WITH REGISTRANT
- ----------------------------------------   -----------------------------   --------------------------
<S>                                        <C>                             <C>
Terry K. Glenn..........................   President                                Trustee
Richard R. Reller.......................   Director                                   None
Thomas J. Verage........................   Director                                   None
William E. Aldrich......................   Senior Vice President            Executive Vice President
Robert W. Crook.........................   Senior Vice President             President and Trustee
Gerald M. Richard.......................   Vice President and Treasurer    Vice President, Treasurer
Michael G. Clark........................   Vice President                             None
Michelle T. Lau.........................   Vice President                             None
Salvatore Venezia.......................   Vice President                             None
Michael J. Brady........................   Vice President                    Senior Vice President
William M. Breen........................   Vice President                  Senior Vice President and
                                                                              Assistant Treasurer
James T. Fatseas........................   Vice President                    Senior Vice President
William Wasel...........................   Vice President                    Senior Vice President
Debra W. Landsman-Yaros.................   Vice President                             None
Mark E. Maguire.........................   Assistant Vice President          Senior Vice President
Patricia A. Schena......................   Assistant Vice President            Vice President and
                                                                              Assistant Secretary
Robert Harris...........................   Secretary                                  None
</TABLE>
    
 
     (c) Not applicable.
 
ITEM 30. LOCATION OF ACCOUNTS AND RECORDS.
 
   
     All accounts, books and other documents required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the Rules thereunder
will be maintained at the offices of the Registrant, Merrill Lynch Intermediate
Government Bond Fund, 800 Scudders Mill Road, Plainsboro, New Jersey 08536; its
Investment Adviser, Merrill Lynch Asset Management, 800 Scudders Mill Road,
Plainsboro, New Jersey 08536; its Transfer Agent, Merrill Lynch Financial Data
Services, Inc., P.O. Box 45289, Jacksonville, Florida 32232-5289; and its
Custodian, State Street Bank and Trust Company, 225 Franklin Street, Boston,
Massachusetts 02110.
    
 
ITEM 31. MANAGEMENT SERVICES.
 
     Other than as set forth under the caption "Management of the Fund" in the
Prospectus constituting Part A of the Registration Statement and under the
caption "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.
 
     The 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>   98
 
                                   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
COUNTY OF SUFFOLK, AND COMMONWEALTH OF MASSACHUSETTS, ON THE   TH DAY OF
FEBRUARY, 1998.
 
                                          MERRILL LYNCH INTERMEDIATE
                                          GOVERNMENT BOND FUND
 
                                          By:      /s/ ROBERT W. CROOK
                                            ------------------------------------
                                                      ROBERT W. CROOK
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS AMENDMENT
TO THE REGISTRANT'S REGISTRATION STATEMENT HAS BEEN SIGNED BELOW BY THE
FOLLOWING PERSONS IN THE CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                   SIGNATURE                                TITLE                    DATE
- -----------------------------------------------  ---------------------------  ------------------
<C>                                              <S>                          <C>
 
              /s/ ROBERT W. CROOK                President and Trustee         February   , 1998
- -----------------------------------------------    (Principal Executive
                ROBERT W. CROOK                    Officer)
 
                       *                         Treasurer (Principal
- -----------------------------------------------    Financial and Accounting
               GERALD M. RICHARD                   Officer)
 
                       *                         Trustee
- -----------------------------------------------
             A. BRUCE BRACKENRIDGE
 
                       *                         Trustee
- -----------------------------------------------
             CHARLES C. CABOT, JR.
 
                       *                         Trustee
- -----------------------------------------------
                JAMES T. FLYNN
 
                       *                         Trustee
- -----------------------------------------------
                TERRY K. GLENN
 
                       *                         Trustee
- -----------------------------------------------
            GEORGE W. HOLBROOK, JR.
 
                       *                         Trustee
- -----------------------------------------------
                W. CARL KESTER
 
           *By: /s/ ROBERT W. CROOK                                            February   , 1998
- -----------------------------------------------
      (ROBERT W. CROOK, ATTORNEY-IN-FACT)
</TABLE>
 
                                       C-8
<PAGE>   99
 
                               INDEX TO EXHIBITS
 
   
<TABLE>
<CAPTION>
EXHIBIT                                                                                    PAGE
NUMBER                                                                                    NUMBER
- -------                                                                                   ------
<S>      <C>  <C>                                                                         <C>
11        --  Consent of Deloitte & Touche LLP, independent auditors of the
              Registrant*...............................................................
27(a)     --  Financial Data Schedule--Class A shares*..................................
  (b)     --  Financial Data Schedule--Class B shares*..................................
  (c)     --  Financial Data Schedule--Class C shares*..................................
  (d)     --  Financial Data Schedule--Class D shares*..................................
</TABLE>
    
 
- ---------------
* Filed herewith.

<PAGE>   1
 
INDEPENDENT AUDITORS' CONSENT
 
   
Merrill Lynch Intermediate Government Bond Fund
(Formerly Merrill Lynch Institutional Intermediate Fund):
    
 
We consent to the use in Post-Effective Amendment No. 14 to Registration
Statement No. 33-8708 of our report dated December 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.
 
Deloitte & Touche LLP
Princeton, New Jersey
   
February 17, 1998
    

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000801421
<NAME> MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
<SERIES>
   <NUMBER> 001
   <NAME> CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-START>                             NOV-01-1996
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                         29462723
<INVESTMENTS-AT-VALUE>                        30188342
<RECEIVABLES>                                   700898
<ASSETS-OTHER>                                   36343
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                30925583
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       819793
<TOTAL-LIABILITIES>                             819793
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      41250840
<SHARES-COMMON-STOCK>                            43628
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     (11870669)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        725619
<NET-ASSETS>                                    424748
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              2665577
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (477905)
<NET-INVESTMENT-INCOME>                        2817672
<REALIZED-GAINS-CURRENT>                     (1031827)
<APPREC-INCREASE-CURRENT>                       918657
<NET-CHANGE-FROM-OPS>                          2074502
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (14144)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          49642
<NUMBER-OF-SHARES-REDEEMED>                     (6138)
<SHARES-REINVESTED>                                124
<NET-CHANGE-IN-ASSETS>                      (17175430)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   (16669034)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           152873
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 651021
<AVERAGE-NET-ASSETS>                            336057
<PER-SHARE-NAV-BEGIN>                             9.66
<PER-SHARE-NII>                                    .39
<PER-SHARE-GAIN-APPREC>                            .08
<PER-SHARE-DIVIDEND>                             (.39)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9,74
<EXPENSE-RATIO>                                   2.08
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000801421
<NAME> MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
<SERIES>
   <NUMBER> 002
   <NAME> CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-START>                             NOV-01-1996
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                         29462723
<INVESTMENTS-AT-VALUE>                        30188342
<RECEIVABLES>                                   700898
<ASSETS-OTHER>                                   36343
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                30925583
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       819793
<TOTAL-LIABILITIES>                             819793
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      41250840
<SHARES-COMMON-STOCK>                            85109
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     (11870669)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        725619
<NET-ASSETS>                                    828851
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              2665577
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (477905)
<NET-INVESTMENT-INCOME>                        2187672
<REALIZED-GAINS-CURRENT>                     (1031827)
<APPREC-INCREASE-CURRENT>                       918657
<NET-CHANGE-FROM-OPS>                          2074502
<EQUALIZATION>                                       0
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<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000801421
<NAME> MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
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   <NAME> CLASS C
       
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000801421
<NAME> MERRILL LYNCH INTERMEDIATE GOVERNMENT BOND FUND
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   <NUMBER> 004
   <NAME> CLASS D
       
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