MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
485BPOS, 1998-10-30
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<PAGE>
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 30, 1998
 
                                                     REGISTRATION NOS.: 33-24245
                                                                        811-5654
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       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. 12                      /X/
                                     AND/OR
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940                                /X/
                                AMENDMENT NO. 13                             /X/
 
                              -------------------
 
                           MORGAN STANLEY DEAN WITTER
                         INTERMEDIATE INCOME SECURITIES
          (FORMERLY NAMED DEAN WITTER INTERMEDIATE INCOME SECURITIES)
                        (A MASSACHUSETTS BUSINESS TRUST)
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 392-1600
 
                                BARRY FINK, ESQ.
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                    (NAME AND ADDRESS OF AGENT FOR SERVICE)
 
                                    COPY TO:
                            DAVID M. BUTOWSKY, ESQ.
                  GORDON ALTMAN BUTOWSKY WEITZEN SHALOV & WEIN
                              114 WEST 47TH STREET
                            NEW YORK, NEW YORK 10036
 
                              -------------------
 
   APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING: As soon as practicable after
                the effective date of the registration statement
 
                              -------------------
 
 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)
            ___ immediately upon filing pursuant to paragraph (b)
            _X_ on October 30, 1998 pursuant to paragraph (b)
            ___ 60 days after filing pursuant to paragraph (a)
            ___ on (date) pursuant to paragraph (a) of rule 485.
 
           Amending the Prospectus and Updating Financial Statements.
 
            -------------------------------------------------------
            -------------------------------------------------------
<PAGE>
           MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
 
                             CROSS-REFERENCE SHEET
 
                                   FORM N-1A
 
<TABLE>
<CAPTION>
ITEM                                                                                      CAPTION
- --------------------------------------------------------  -----------------------------------------------------------------------
<S>                                                       <C>
PART A                                                                                  PROSPECTUS
 1.  ...................................................  Cover Page
 2.  ...................................................  Prospectus Summary; Summary of Fund Expenses
 3.  ...................................................  Financial Highlights; Performance Information
 4.  ...................................................  Prospectus Summary; Investment Objective and Policies; Risk
                                                           Considerations; The Fund and its Management; Cover Page; Investment
                                                           Restrictions
 5.  ...................................................  The Fund and Its Management; Back Cover; Investment
                                                           Objectives and Policies
 6.  ...................................................  Dividends, Distributions and Taxes; Additional Information
 7.  ...................................................  Shareholder Services
 8.  ...................................................  Purchase of Fund Shares; Redemptions and Repurchases; Shareholder
                                                           Services
 9.  ...................................................  Not Applicable
 
PART B                                                                      STATEMENT OF ADDITIONAL INFORMATION
10.  ...................................................  Cover Page
11.  ...................................................  Table of Contents
12.  ...................................................  The Fund and Its Management
13.  ...................................................  Investment Practices and Policies; Investment Restrictions;
                                                           Portfolio Transactions and Brokerage
14.  ...................................................  Trustees and Officers
15.  ...................................................  The Fund and Its Management; Trustees and Officers
16.  ...................................................  The Fund and Its Management; The Distributor; Custodian and Transfer
                                                           Agent; Independent Accountants; Shareholder
                                                           Services
17.  ...................................................  Portfolio Transactions and Brokerage
18.  ...................................................  Description of Shares
19.  ...................................................  The Distributor; Purchase of Fund Shares; Redemptions and Repurchases;
                                                           Financial Statements; Shareholder Services
20.  ...................................................  Dividends, Distributions and Taxes
21.  ...................................................  Not applicable
22.  ...................................................  Performance Information
23.  ...................................................  Financial Statements
</TABLE>
 
PART C
 
    Information required to be included in Part C is set forth under the
appropriate item, so numbered, in Part C of this Registration Statement.
<PAGE>
   
              PROSPECTUS
              OCTOBER 30, 1998
    
 
   
              Morgan Stanley Dean Witter Intermediate Income Securities (the
"Fund") is an open-end, diversified management investment company, whose
investment objective is high current income consistent with safety of principal.
The Fund seeks to achieve its investment objective by investing primarily in
intermediate term, investment grade fixed-income securities. See "Investment
Objective and Policies."
    
 
               The Fund offers four classes of shares (each, a "Class"), each
with a different combination of sales charges, ongoing fees and other features.
The different distribution arrangements permit 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 "Purchase of Fund
Shares--Alternative Purchase Arrangements."
 
   
               This Prospectus sets forth concisely the information you should
know before investing in the Fund. It should be read and retained for future
reference. Additional information about the Fund is contained in the Statement
of Additional Information, dated October 30, 1998, which has been filed with the
Securities and Exchange Commission, and which is available at no charge upon
request of the Fund at the address or telephone numbers listed on this page. The
Statement of Additional Information is incorporated herein by reference.
    
 
   
     MORGAN STANLEY DEAN WITTER
     DISTRIBUTORS INC.
      DISTRIBUTOR
    
 
      TABLE OF CONTENTS
 
   
Prospectus Summary/2
Summary of Fund Expenses/4
Financial Highlights/6
The Fund and its Management/9
Investment Objective and Policies/9
  Risk Considerations/13
Investment Restrictions/14
Purchase of Fund Shares/14
Shareholder Services/26
Redemptions and Repurchases/29
Dividends, Distributions and Taxes/30
Performance Information/31
Additional Information/32
    
 
SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK, AND THE SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT
INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD, OR ANY OTHER AGENCY.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
   
    Morgan Stanley Dean Witter
    Intermediate Income Securities
    Two World Trade Center
    New York, New York 10048
    (212) 392-2550 or
    (800) 869-NEWS (toll-free)
    
<PAGE>
PROSPECTUS SUMMARY
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>                 <C>
The                 The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an open- end,
Fund                diversified management investment company. The Fund invests primarily in intermediate term, investment grade
                    fixed-income securities.
- ------------------------------------------------------------------------------------------------------------------------------------
Shares              Shares of beneficial interest with $0.01 par value (see page 32). The Fund offers four Classes of shares, each
Offered             with a different combination of sales charges, ongoing fees and other features (see pages 14).
- ------------------------------------------------------------------------------------------------------------------------------------
Minimum             The minimum initial investment for each Class is $1,000 ($100 if the account is opened through EasyInvest-SM-).
Purchase            Class D shares are only available to persons investing $5 million ($25 million for certain qualified plans) or
                    more and to certain other limited categories of investors. For the purpose of meeting the minimum $5 million (or
                    $25 million) investment for Class D shares, and subject to the $1,000 minimum initial investment for each Class
                    of the Fund, an investor's existing holdings of Class A shares and shares of funds for which Morgan Stanley Dean
                    Witter Advisors Inc. serves as investment manager ("Morgan Stanley Dean Witter Funds") that are sold with a
                    front-end sales charge, and concurrent investments in Class D shares of the Fund and other Morgan Stanley Dean
                    Witter Funds that are multiple class funds, will be aggregated. The minimum subsequent investment is $100 (see
                    page 14).
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          The investment objective of the Fund is high current income consistent with safety of principal (see page 9).
Objective
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          Morgan Stanley Dean Witter Advisors Inc., the Investment Manager of the Fund, and its wholly-owned subsidiary,
Manager             Morgan Stanley Dean Witter Services Company Inc., serve in various investment management, advisory, management
                    and administrative capacities to 100 investment companies and other portfolios with assets of approximately
                    $113.7 billion at September 30, 1997 (see page 9).
- ------------------------------------------------------------------------------------------------------------------------------------
Management          The Investment Manager receives a monthly fee at the annual rate of 0.60% of daily net assets, scaled down on
Fee                 assets over $500 million (see page 9).
- ------------------------------------------------------------------------------------------------------------------------------------
Distributor         Morgan Stanley Dean Witter Distributors Inc. is the Distributor of the Fund's shares. The Fund has adopted a
and                 distribution plan pursuant to Rule 12b-1 under the Investment Company Act (the "12b-1 Plan") with respect to the
Distribution        distribution fees paid by the Class A, Class B and Class C shares of the Fund to the Distributor. The entire
Fee                 12b-1 fee payable by Class A and a portion of the 12b-1 fee payable by each of Class B and Class C equal to
                    0.20% of the average daily net assets of Class B and 0.25% of the average daily net assets of Class C are
                    currently each characterized as a service fee within the meaning of the National Association of Securities
                    Dealers, Inc. guidelines. The remaining portion of the 12b-1 fee, if any, is characterized as an asset-based
                    sales charge (see pages 14 and 24).
- ------------------------------------------------------------------------------------------------------------------------------------
Alternative         Four classes of shares are offered:
Purchase
Arrangements        - Class A shares are offered with a front-end sales charge, starting at 4.25% and reduced for larger purchases.
                    Investments of $1 million or more (and investments by certain other limited categories of investors) are not
                    subject to any sales charge at the time of purchase but a contingent deferred sales charge ("CDSC") of 1.0% may
                    be imposed on redemptions within one year of purchase. The Fund is authorized to reimburse the Distributor for
                    specific expenses incurred in promoting the distribution of the Fund's Class A shares and servicing shareholder
                    accounts pursuant to the Fund's 12b-1 Plan. Reimbursement may in no event exceed an amount equal to payments at
                    an annual rate of 0.25% of average daily net assets of the Class (see pages 14, 18 and 25).
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
                                       2
<PAGE>
- --------------------------------------------------------------------------------
   
<TABLE>
<S>                 <C>
                    - Class B shares are offered without a front-end sales charge, but will in most cases be subject to a CDSC
                    (scaled down from 5.0% to 1.0%) if redeemed within six years after purchase. The CDSC will be imposed on any
                    redemption of shares if after such redemption the aggregate current value of a Class B account with the Fund
                    falls below the aggregate amount of the investor's purchase payments made during the six years preceding the
                    redemption. A different CDSC schedule applies to investments by certain qualified plans. Class B shares are also
                    subject to a 12b-1 fee assessed at the annual rate of 0.85% of the lesser of: (a) the average daily net sales of
                    the Fund's Class B shares or (b) the average daily net assets of Class B. All shares of the Fund held prior to
                    July 28, 1997 (other than the shares held by certain employee benefit plans established by certain subsidiaries
                    of Morgan Stanley Dean Witter & Co.) have been designated Class B shares. Shares held by those employee benefit
                    plans prior to July 28, 1997 have been designated Class D shares. Shares held before May 1, 1997 that have been
                    designated Class B shares will convert to Class A shares in May 2007. In all other instances, Class B shares
                    convert to Class A shares approximately ten years after the date of the original purchase (see pages 14, 20 and
                    25).
                    - Class C shares are offered without a front-end sales charge, but will in most cases be subject to a CDSC of
                    1.0% if redeemed within one year after purchase. The Fund is authorized to reimburse the Distributor for
                    specific expenses incurred in promoting the distribution of the Fund's Class C shares and servicing shareholder
                    accounts pursuant to the Fund's 12b-1 Plan. Reimbursement may in no event exceed an amount equal to payments at
                    an annual rate of 0.85% of average daily net assets of the Class (see pages 14, 23 and 25).
                    - Class D shares are offered only to investors meeting an initial investment minimum of $5 million ($25 million
                    for certain qualified plans) and to certain other limited categories of investors. Class D shares are offered
                    without a front-end sales charge or CDSC and are not subject to any 12b-1 fee (see pages 14, 23 and 25).
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends           Dividends are declared daily, and either paid monthly in additional shares of the Fund or, at the shareholder's
and                 option, paid monthly in cash. Dividends from net short-term, mid-term and long-term capital gains, if any, are
Capital Gains       distributed at least once each year. The Fund may, however, determine to retain all or part of any net long-term
Distributions       and net mid-term capital gains in any year for reinvestment. Dividends and capital gains distributions paid on
                    shares of a Class are automatically reinvested in additional shares of the same Class at net asset value unless
                    the shareholder elects to receive cash. Shares acquired by dividend and distribution reinvestment will not be
                    subject to any sales charge or CDSC (see pages 26 and 30).
- ------------------------------------------------------------------------------------------------------------------------------------
Redemption          Shares are redeemable by the shareholder at net asset value less any applicable CDSC on Class A, Class B or
                    Class C shares. An account may be involuntarily redeemed if the total value of the account is less than $100 or,
                    if the account was opened through EasyInvest-SM-, if after twelve months the shareholder has invested less than
                    $1,000 in the account (see page 29).
- ------------------------------------------------------------------------------------------------------------------------------------
Risk                The net asset value of the Fund's shares will fluctuate with changes in the market value of its portfolio
Considerations      securities. Interest rate fluctuations will affect the Fund's net asset value but not the income received by the
                    Fund from its portfolio securities. The Fund may engage in various investment strategies including reverse
                    repurchase agreements, when-issued and delayed delivery securities and forward commitments and when, as and if
                    issued securities. The risks associated with these investments are included in their description (pages 9-12)
                    and in the "Risk Considerations" section (page 13).
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
                ELSEWHERE IN THE PROSPECTUS AND IN THE STATEMENT
                           OF ADDITIONAL INFORMATION.
 
                                       3
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
 
   
    The following table illustrates all expenses and fees that a shareholder of
the Fund will incur. The expenses and fees set forth in the table are based on
the expenses and fees for the fiscal year ended August 31, 1998.
    
 
   
<TABLE>
<CAPTION>
                                                                                   CLASS A    CLASS B    CLASS C    CLASS D
                                                                                  ---------   -------   ---------   -------
<S>                                                                               <C>         <C>       <C>         <C>
SHAREHOLDER TRANSACTION EXPENSES
- --------------------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases (as a percentage of offering price)...   4.25%(1)    None      None        None
Sales Charge Imposed on Dividend Reinvestments..................................   None        None      None        None
Maximum Contingent Deferred Sales Charge (as a percentage of original purchase
  price or redemption proceeds).................................................   None(2)     5.00%(3)  1.00%(4)    None
Redemption Fees.................................................................   None        None      None        None
Exchange Fee....................................................................   None        None      None        None
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- --------------------------------------------------------------------------------
Management Fees (5).............................................................   0.60%       0.60%     0.60%       0.60%
12b-1 Fees (6) (7)..............................................................   0.24%       0.85%     0.85%       None
Other Expenses..................................................................   0.26%       0.26%     0.26%       0.26%
Total Fund Operating Expenses...................................................   1.10%       1.71%     1.71%       0.86%
</TABLE>
    
 
- ------------
(1) REDUCED FOR PURCHASES OF $25,000 AND OVER (SEE "PURCHASE OF FUND
    SHARES--INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES").
 
(2) INVESTMENTS THAT ARE NOT SUBJECT TO ANY SALES CHARGE AT THE TIME OF PURCHASE
    ARE SUBJECT TO A CDSC OF 1.00% THAT WILL BE IMPOSED ON REDEMPTIONS MADE
    WITHIN ONE YEAR AFTER PURCHASE, EXCEPT FOR CERTAIN SPECIFIC CIRCUMSTANCES
    (SEE "PURCHASE OF FUND SHARES--INITIAL SALES CHARGE ALTERNATIVE--CLASS A
    SHARES").
 
(3) THE CDSC IS SCALED DOWN TO 1.00% DURING THE SIXTH YEAR, REACHING ZERO
    THEREAFTER.
 
(4) ONLY APPLICABLE TO REDEMPTIONS MADE WITHIN ONE YEAR AFTER PURCHASE (SEE
    "PURCHASE OF FUND SHARES-- LEVEL LOAD ALTERNATIVE--CLASS C SHARES").
 
   
(5) MANAGEMENT FEES AND OTHER EXPENSES ARE BASED ON THE FUND'S ACTUAL AGGREGATE
    EXPENSES.
    
 
   
(6) THE 12B-1 FEE IS ACCRUED DAILY AND PAYABLE MONTHLY. THE ENTIRE 12B-1 FEE
    PAYABLE BY CLASS A AND A PORTION OF THE 12B-1 FEE PAYABLE BY EACH OF CLASS B
    AND CLASS C EQUAL TO 0.20% OF THE AVERAGE DAILY NET ASSETS OF CLASS B AND
    0.25% OF THE AVERAGE DAILY NET ASSETS OF CLASS C ARE CURRENTLY EACH
    CHARACTERIZED AS A SERVICE FEE WITHIN THE MEANING OF NATIONAL ASSOCIATION OF
    SECURITIES DEALERS, INC. ("NASD") GUIDELINES AND ARE PAYMENTS MADE FOR
    PERSONAL SERVICE AND/OR MAINTENANCE OF SHAREHOLDER ACCOUNTS. THE REMAINDER
    OF THE 12B-1 FEE, IF ANY, IS AN ASSET-BASED SALES CHARGE, AND IS A
    DISTRIBUTION FEE PAID TO THE DISTRIBUTOR TO COMPENSATE IT FOR THE SERVICES
    PROVIDED AND THE EXPENSES BORNE BY THE DISTRIBUTOR AND OTHERS IN THE
    DISTRIBUTION OF THE FUND'S SHARES (SEE "PURCHASE OF FUND SHARES--PLAN OF
    DISTRIBUTION").
    
 
   
(7) UPON CONVERSION OF CLASS B SHARES TO CLASS A SHARES, SUCH SHARES WILL BE
    SUBJECT TO THE LOWER 12B-1 FEE APPLICABLE TO CLASS A SHARES. NO SALES CHARGE
    IS IMPOSED AT THE TIME OF CONVERSION OF CLASS B SHARES TO CLASS A SHARES.
    CLASS C SHARES DO NOT HAVE A CONVERSION FEATURE AND, THEREFORE, ARE SUBJECT
    TO AN ONGOING 0.85% DISTRIBUTION FEE (SEE "PURCHASE OF FUND
    SHARES--ALTERNATIVE PURCHASE ARRANGEMENTS").
    
 
                                       4
<PAGE>
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
EXAMPLES                                            1 Year   3 Years   5 Years   10 Years
- --------------------------------------------------  ------   -------   -------   --------
<S>                                                 <C>      <C>       <C>       <C>
You would pay the following expenses on a $1,000
 investment assuming (1) a 5% annual return and
 (2) redemption at the end of each time period:
    Class A.......................................   $53       $76       $100      $171
    Class B.......................................   $67       $84       $113      $202
    Class C.......................................   $27       $54       $93       $202
    Class D.......................................   $ 9       $27       $48       $106
 
You would pay the following expenses on the same
 $1,000 investment assuming no redemption at the
 end of the period:
    Class A.......................................   $53       $76       $100      $171
    Class B.......................................   $17       $54       $93       $202
    Class C.......................................   $17       $54       $93       $202
    Class D.......................................   $ 9       $27       $48       $106
</TABLE>
    
 
    THE ABOVE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR
FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF EACH CLASS MAY BE GREATER OR
LESS THAN THOSE SHOWN.
 
    The purpose of this table is to assist the investor in understanding the
various costs and expenses that an investor in the Fund will bear directly or
indirectly. For a more complete description of these costs and expenses, see
"The Fund and Its Management," "Purchase of Fund Shares--Plan of Distribution"
and "Redemptions and Repurchases."
 
    Long-term shareholders of Class B and Class C may pay more in sales charges,
including distribution fees, than the economic equivalent of the maximum
front-end sales charges permitted by the NASD.
 
                                       5
<PAGE>
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
   
    The following ratios and per share data for a share of beneficial interest
outstanding throughout each period have been audited by PricewaterhouseCoopers
LLP, independent accountants. The financial highlights should be read in
conjunction with the financial statements, notes thereto, and the unqualified
report of independent accountants, which are contained in the Statement of
Additional Information. Further information about the performance of the Fund is
contained in the Fund's Annual Report to Shareholders, which may be obtained
without charge upon request to the Fund.
    
   
<TABLE>
<CAPTION>
                                        FOR THE YEAR ENDED AUGUST 31
                             ---------------------------------------------------
CLASS B SHARES               1998++     1997*++     1996       1995       1994
                             -------    -------    -------    -------    -------
<S>                          <C>        <C>        <C>        <C>        <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning
 of period................   $  9.59    $  9.39    $  9.69    $  9.51    $ 10.26
                             -------    -------    -------    -------    -------
Net investment income.....      0.51       0.53       0.55       0.59       0.58
Net realized and
 unrealized gain (loss)...      0.11       0.20      (0.30)      0.19      (0.73)
                             -------    -------    -------    -------    -------
Total from investment
 operations...............      0.62       0.73       0.25       0.78      (0.15)
                             -------    -------    -------    -------    -------
Less dividends and
 distributions from:
   Net investment
    income................     (0.51)     (0.53)     (0.55)     (0.59)     (0.56)
   Net realized gain......        --         --         --      (0.01)     (0.04)
                             -------    -------    -------    -------    -------
Total dividends and
 distributions............     (0.51)     (0.53)     (0.55)     (0.60)     (0.60)
                             -------    -------    -------    -------    -------
Net asset value, end of
 period...................   $  9.70    $  9.59    $  9.39    $  9.69    $  9.51
                             -------    -------    -------    -------    -------
                             -------    -------    -------    -------    -------
TOTAL INVESTMENT
 RETURN+..................     6.53%      7.93%      2.58%      8.56%    (1.50)%
RATIOS TO AVERAGE NET
 ASSETS:
Expenses..................     1.71%(4)   1.65%      1.62%      1.63%      1.63%
Net investment income.....     5.19%(4)   5.52%      5.69%      6.23%      5.80%
SUPPLEMENTAL DATA:
Net assets, end of period,
 in thousands.............   $151,515   $162,959   $208,911   $232,752   $245,750
Portfolio turnover rate...       98%        98%       115%       114%       122%
 
<CAPTION>
                                                                         FOR THE PERIOD
                                                                          MAY 3, 1989*
                                                                             THROUGH
CLASS B SHARES                1993       1992       1991       1990      AUGUST 31, 1989
                             -------    -------    -------    -------    ---------------
<S>                          <C>        <C>        <C>        <C>        <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning
 of period................   $ 10.05    $  9.59    $  9.42    $  9.98    $   10.00
                             -------    -------    -------    -------      -------
Net investment income.....      0.62       0.70       0.79       0.86         0.28
Net realized and
 unrealized gain (loss)...      0.20       0.46       0.17      (0.55)       (0.02)
                             -------    -------    -------    -------      -------
Total from investment
 operations...............      0.82       1.16       0.96       0.31         0.26
                             -------    -------    -------    -------      -------
Less dividends and
 distributions from:
   Net investment
    income................     (0.61)     (0.70)     (0.79)     (0.86)       (0.28)
   Net realized gain......        --         --         --      (0.01)          --
                             -------    -------    -------    -------      -------
Total dividends and
 distributions............     (0.61)     (0.70)     (0.79)     (0.87)       (0.28)
                             -------    -------    -------    -------      -------
Net asset value, end of
 period...................   $ 10.26    $ 10.05    $  9.59    $  9.42    $    9.98
                             -------    -------    -------    -------      -------
                             -------    -------    -------    -------      -------
TOTAL INVESTMENT
 RETURN+..................     8.43%     12.58%     10.78%      3.22%        2.57%(1)
RATIOS TO AVERAGE NET
 ASSETS:
Expenses..................     1.62%      1.69%      1.69%      1.75%        1.42%(2)(3)
Net investment income.....     6.12%      7.11%      8.49%      8.78%        8.18%(2)(3)
SUPPLEMENTAL DATA:
Net assets, end of period,
 in thousands.............   $254,431   $187,285   $115,204   $114,086     $69,946
Portfolio turnover rate...      132%        93%       150%       135%          30%(1)
</TABLE>
    
 
- ---------------
   
 * COMMENCEMENT OF OPERATIONS.
    
   
 ** PRIOR TO JULY 28, 1997, THE FUND ISSUED ONE CLASS OF SHARES. ALL SHARES OF
    THE FUND HELD PRIOR TO THAT DATE, OTHER THAN SHARES HELD BY CERTAIN EMPLOYEE
    BENEFIT PLANS ESTABLISHED BY DEAN WITTER REYNOLDS INC. AND ITS AFFILIATE,
    SPS TRANSACTION SERVICES, INC., HAVE BEEN DESIGNATED AS CLASS B SHARES.
    SHARES HELD BY THOSE EMPLOYEE BENEFIT PLANS PRIOR TO JULY 28, 1997 HAVE BEEN
    DESIGNATED CLASS D SHARES.
    
   
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
    
   
 + DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE. CALCULATED BASED ON THE NET
   ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE PERIOD.
    
   
(1) NOT ANNUALIZED.
    
   
(2) ANNUALIZED.
    
   
(3) IF THE FUND HAD BORNE ALL THE EXPENSES THAT WERE ASSUMED OR WAIVED BY THE
    INVESTMENT MANAGER, THE ABOVE EXPENSE AND NET INVESTMENT INCOME RATIOS WOULD
    HAVE BEEN 2.15% AND 7.44%, RESPECTIVELY.
    
   
(4) REFLECTS OVERALL FUND RATIOS FOR INVESTMENT INCOME AND NON-CLASS SPECIFIC
EXPENSES.
    
 
                                       6
<PAGE>
- --------------------------------------------------------------------------------
   
<TABLE>
<CAPTION>
                                                                                            FOR THE PERIOD
                                                                          FOR THE YEAR      JULY 28, 1997*
                                                                             ENDED             THROUGH
                                                                           AUGUST 31,         AUGUST 31,
CLASS A SHARES                                                               1998++             1997++
                                                                        ----------------   ----------------
<S>                                                                     <C>                <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  9.59            $  9.68
                                                                            -------            -------
Net investment income.................................................         0.56               0.06
Net realized and unrealized gain (loss)...............................         0.13              (0.10)
                                                                            -------            -------
Total from investment operations......................................         0.69              (0.04)
                                                                            -------            -------
Less dividends from net investment income.............................        (0.57)             (0.05)
                                                                            -------            -------
Net asset value, end of period........................................      $  9.71            $  9.59
                                                                            -------            -------
                                                                            -------            -------
TOTAL INVESTMENT RETURN+..............................................         7.30%             (0.46)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         1.10%(3)           2.18%(2)
Net investment income.................................................         5.80%(3)           6.10%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................       $3,457             $1,855
Portfolio turnover rate...............................................           98%                98%
 
<CAPTION>
 
CLASS C SHARES
<S>                                                                     <C>                <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  9.61            $  9.68
                                                                            -------            -------
Net investment income.................................................         0.49               0.04
Net realized and unrealized gain (loss)...............................         0.11              (0.07)
                                                                            -------            -------
Total from investment operations......................................         0.60              (0.03)
                                                                            -------            -------
Less dividends from net investment income.............................        (0.50)             (0.04)
                                                                            -------            -------
Net asset value, end of period........................................      $  9.71            $  9.61
                                                                            -------            -------
                                                                            -------            -------
TOTAL INVESTMENT RETURN+..............................................         6.39%             (0.31)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         1.71%(3)           2.02%(2)
Net investment income.................................................         5.19%(3)           4.22%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................         $457                $38
Portfolio turnover rate...............................................           98%                98%
</TABLE>
    
 
- -------------
   
 * THE DATE SHARES WERE FIRST ISSUED.
    
   
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
    
   
 + DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE. CALCULATED BASED ON THE NET
   ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE PERIOD.
    
   
(1) NOT ANNUALIZED.
    
   
(2) ANNUALIZED.
    
   
(3) REFLECTS OVERALL FUND RATIOS FOR INVESTMENT INCOME AND NON-CLASS SPECIFIC
    EXPENSES.
    
 
                                       7
<PAGE>
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                            FOR THE PERIOD
                                                                                            JULY 28, 1997*
                                                                          FOR THE YEAR         THROUGH
                                                                              ENDED           AUGUST 31,
CLASS D SHARES                                                          AUGUST 31, 1998++       1997++
                                                                        -----------------   --------------
<S>                                                                     <C>                 <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................       $ 9.59             $ 9.68
                                                                            -------            -------
Net investment income.................................................         0.59               0.05
Net realized and unrealized gain (loss)...............................         0.11              (0.09)
                                                                            -------            -------
Total from investment operations......................................         0.70              (0.04)
                                                                            -------            -------
Less dividends from net investment income.............................        (0.59)             (0.05)
                                                                            -------            -------
Net asset value, end of period........................................       $ 9.70             $ 9.59
                                                                            -------            -------
                                                                            -------            -------
 
TOTAL INVESTMENT RETURN+..............................................         7.43%             (0.44)%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         0.86%(3)           1.11%(2)
Net investment income.................................................         6.04%(3)           5.91%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................       $5,726             $4,880
Portfolio turnover rate...............................................           98%                98%
</TABLE>
    
 
- -------------
   
 * THE DATE SHARES WERE FIRST ISSUED.
    
   
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
    
   
 + CALCULATED BASED ON THE NET ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE
PERIOD.
    
   
(1) NOT ANNUALIZED.
    
   
(2) ANNUALIZED.
    
   
(3) REFLECTS OVERALL FUND RATIOS FOR INVESTMENT INCOME AND NON-CLASS SPECIFIC
    EXPENSES.
    
 
                                       8
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
   
    Morgan Stanley Dean Witter Intermediate Income Securities (formerly named
Dean Witter Intermediate Income Securities) (the "Fund") is an open-end,
diversified management investment company. The Fund is a trust of the type
commonly known as a "Massachusetts business trust" and was organized under the
laws of the Commonwealth of Massachusetts on September 1, 1988.
    
 
   
    Morgan Stanley Dean Witter Advisors, Inc. ("MSDW Advisors" or the
"Investment Manager"), whose address is Two World Trade Center, New York, New
York 10048, is the Fund's Investment Manager. The Investment Manager is a
wholly-owned subsidiary of Morgan Stanley Dean Witter & Co., a preeminent global
financial services firm that maintains leading market positions in each of its
three primary businesses -- securities, asset management and credit services.
The Investment Manager, which was incorporated in July, 1992 under the name Dean
Witter InterCapital Inc., changed its name to Morgan Stanley Dean Witter
Advisors Inc. on June 22, 1998.
    
 
   
    MSDW Advisors and its wholly-owned subsidiary, Morgan Stanley Dean Witter
Services Company Inc. ("MSDW Services"), serve in various investment management,
advisory, management and administrative capacities to 100 investment companies,
28 of which are listed on the New York Stock Exchange, with combined assets of
approximately $109.6 billion at September 30, 1998. The Investment Manager also
manages portfolios of pension plans, other institutions and individuals which
aggregated approximately $4.1 billion at such date.
    
 
   
    The Fund has retained the Investment Manager to provide administrative
services, manage its business affairs and manage the investment of the Fund's
assets, including the placing of orders for the purchase and sale of portfolio
securities. MSDW Advisors has retained MSDW Services to provide the
aforementioned administrative services to the Fund. The Fund's Trustees review
the various services provided by or under the direction of the Investment
Manager to ensure that the Fund's general investment policies and programs are
being properly carried out and that administrative services are being provided
to the Fund in a satisfactory manner.
    
 
   
    As full compensation for the services and facilities furnished to the Fund
and for expenses of the Fund assumed by the Investment Manager, the Fund pays
the Investment Manager monthly compensation calculated daily by applying the
annual rate of 0.60% to the Fund's daily net assets up to $500 million, scaled
down at various levels to 0.30% on assets over $1 billion. For the fiscal year
ended August 31, 1998, the Fund accrued total compensation to the Investment
Manager amounting to 0.60% of the Fund's average daily net assets and the total
expenses of each Class amounted to 1.10%, 1.71%, 1.71% and 0.86% of the average
daily net assets of Class A, Class B, Class C and Class D, respectively.
    
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The investment objective of the Fund is high current income consistent with
safety of principal. There is no assurance that the objective will be achieved.
This investment objective is a fundamental policy and may not be changed without
approval of the Fund's shareholders. The Fund seeks to achieve its objective by
investing at least 65% of its total assets in intermediate term, investment
grade fixed-income securities. The Fund will maintain an average weighted
maturity of approximately seven years or less and may not invest in securities
with remaining maturities greater than twelve years. Under normal conditions,
the Fund's average weighted maturity will not be less than three years. (Under
the current interpretation by the staff of the Securities and Exchange
Commission, an intermediate bond fund must have an average weighted maturity
between three and ten years.)
 
                                       9
<PAGE>
    Under normal circumstances, the Fund will invest primarily in corporate debt
securities and preferred stock of investment grade, which consists of securities
which are rated at the time of purchase Baa or better by Moody's Investors
Service, Inc. ("Moody's") or BBB or better by Standard & Poor's Corporation
("Standard & Poor's"), or which, if unrated, are deemed to be of comparable
quality by the Fund's Trustees. Fixed-income securities rated Baa by Moody's
have speculative characteristics. (A more detailed description of bond ratings
is contained in the Appendix to the Statement of Additional Information.) The
Fund may also purchase U.S. Government securities (securities guaranteed as to
principal and interest by the United States or its agencies or
instrumentalities) and investment grade securities, denominated in U.S. Dollars,
issued by foreign governments or issuers. U.S. Government securities in which
the Fund may invest include zero coupon securities and mortgage-backed
securities, such as securities issued by the Government National Mortgage
Association, the Federal National Mortgage Association and the Federal Home Loan
Mortgage Corporation. There can be no assurance that the investment objective of
the Fund will be achieved.
 
    The Investment Manager believes that the Fund's policies of purchasing
intermediate term securities will reduce the volatility of the Fund's net asset
value over the long term. Although the values of fixed-income securities
generally increase during periods of declining interest rates and decrease
during periods of increasing interest rates, the extent of these fluctuations
has historically generally been smaller for intermediate term securities than
for securities with longer maturities. Conversely, the yield available on
intermediate term securities has also historically been lower than those
available from long term securities.
 
    Investment by the Fund in U.S. Dollar denominated fixed-income securities
issued by foreign governments and other foreign issuers may involve certain
risks not associated with U.S. issued securities. Those risks include the
political or economic instability of the issuer or of the country of issue, the
difficulty of predicting international trade patterns and the possibility of
imposition of exchange controls. In addition, there may be less publicly
available information about a foreign company than about a domestic company. A
more detailed description of the general risks of foreign issuers is contained
in the Statement of Additional Information. The Fund believes that those risks
are substantially lessened because the foreign securities in which the Fund may
invest are investment grade.
 
    While the Fund will invest primarily in investment grade fixed-income
securities, under ordinary circumstances it also may invest up to 35% of its
total assets in money market instruments, repurchase agreements, as discussed
below, and up to 5% of the Fund's net assets may be invested in lower rated
fixed-income securities.
 
    Lower rated fixed-income securities, which are those rated from Ba to C or
BB to C by Moody's or Standard & Poor's, respectively, are considered to be
speculative investments. Such lower rated securities, while producing higher
yield than investment grade securities, are subject to credit risk to a greater
extent than investment grade securities. The Fund does not have any minimum
quality rating standard with respect to the portion (up to 5%) of its net assets
which may be invested in lower rated securities. See the Statement of Additional
Information for a description of the special risks and characteristics of lower
rated fixed-income securities.
 
    There may be periods during which, in the opinion of the Investment Manager,
market conditions warrant reduction of some or all of the Fund's securities
holdings. During such periods, the Fund may adopt a temporary "defensive"
posture in which greater than 35% of its total assets are invested in cash or
money market instruments. Money market instruments in which the Fund may invest
are securities issued or guaranteed by the U.S. Government (Treasury bills,
notes and bonds, including zero coupon securities); bank obligations; Eurodollar
certificates of deposit; obligations of savings institutions; fully insured
certificates of deposit; and commercial paper rated within the two highest
 
                                       10
<PAGE>
grades by Moody's or Standard & Poor's or, if not rated, are issued by a company
having an outstanding debt issue rated at least AA by Standard & Poor's or Aa by
Moody's.
 
    ZERO COUPON SECURITIES.  A portion of the fixed-income securities purchased
by the Fund may be zero coupon securities. Such securities are purchased at a
discount from their face amount, giving the purchaser the right to receive their
full value at maturity. The interest earned on such securities is, implicitly,
automatically compounded and paid out at maturity. While such compounding at a
constant rate eliminates the risk of receiving lower yields upon reinvestment of
interest if prevailing interest rates decline, the owner of a zero coupon
security will be unable to participate in higher yields upon reinvestment of
interest received on interest-paying securities if prevailing interest rates
rise.
 
    A zero coupon security pays no interest to its holder during its life.
Therefore, to the extent the Fund invests in zero coupon securities, it will not
receive current cash available for distribution to shareholders. In addition,
zero coupon securities are subject to substantially greater price fluctuations
during periods of changing prevailing interest rates than are comparable
securities which pay interest on a current basis. Current federal tax law
requires that a holder (such as the Fund) of a zero coupon security accrue a
portion of the discount at which the security was purchased as income each year
even though the Fund receives no interest payments in cash on the security
during the year.
 
    REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements, which
may be viewed as a type of secured lending by the Fund, and which typically
involve the acquisition by the Fund of debt securities from a selling financial
institution such as a bank, savings and loan association or broker-dealer. The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security at a specified price and at
a fixed time in the future, usually not more than seven days from the date of
purchase. While repurchase agreements involve certain risks not associated with
direct investments in debt securities, including the risks of default or
bankruptcy of the selling financial institution, the Fund follows procedures
designed to minimize those risks. These procedures include effecting repurchase
transactions only with large, well-capitalized and well established financial
institutions and maintaining adequate collateralization.
 
    REVERSE REPURCHASE AGREEMENTS.  The Fund may also use reverse repurchase
agreements for purposes of meeting redemptions or as part of its investment
strategy. Reverse repurchase agreements involve sales by the Fund of portfolio
assets concurrently with an agreement by the Fund to repurchase the same assets
at a later date at a fixed price. Generally, the effect of such a transaction is
that the Fund can recover all or most of the cash invested in the portfolio
securities involved during the term of the reverse repurchase agreement, while
it will be able to keep the interest income associated with those portfolio
securities. Such transactions are only advantageous if the interest cost to the
Fund of the reverse repurchase transaction is less than the cost of obtaining
the cash otherwise. Opportunities to achieve this advantage may not always be
available, and the Fund intends to use the reverse repurchase technique only
when it will be to its advantage to do so. The Fund will establish a segregated
account with its custodian bank in which it will maintain cash, U.S. Government
securities or other liquid portfolio securities equal in value to its
obligations in respect of reverse repurchase agreements. Reverse repurchase
agreements are considered borrowings by the Fund. The use of borrowed funds for
other than emergency purposes constitutes leveraging, which is a speculative
technique. Reverse repurchase agreements may not exceed 10% of the Fund's total
assets.
 
    WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS.  From
time to time, in the ordinary course of business, the Fund may purchase
securities on a when-issued or delayed delivery basis or may purchase or sell
securities on
 
                                       11
<PAGE>
a forward commitment basis. When such transactions are negotiated, the price is
fixed at the time of the commitment, but delivery and payment can take place a
month or more after the date of the commitment. There is no overall limit on the
percentage of the Fund's assets which may be committed to the purchase of
securities on a when-issued, delayed delivery or forward commitment basis. An
increase in the percentage of the Fund's assets committed to the purchase of
securities on a when-issued, delayed delivery or forward commitment basis may
increase the volatility of the Fund's net asset value.
 
    WHEN, AS AND IF ISSUED SECURITIES.  The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization, leveraged buyout or debt restructuring. If the
anticipated event does not occur and the securities are not issued, the Fund
will have lost an investment opportunity. There is no overall limit on the
percentage of the Fund's assets which may be committed to the purchase of
securities on a "when, as and if issued" basis. An increase in the percentage of
the Fund's assets committed to the purchase of securities on a "when, as and if
issued" basis may increase the volatility of its net asset value.
 
    PRIVATE PLACEMENTS.  The Fund may invest up to 5% of its total assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933, as amended (the "Securities
Act"), or which are otherwise not readily marketable. (Securities eligible for
resale pursuant to Rule 144A under the Securities Act, and determined to be
liquid pursuant to the procedures discussed in the following paragraph, are not
subject to the foregoing restriction.) These securities are generally referred
to as private placements or restricted securities. Limitations on the resale of
such securities may have an adverse effect on their marketability, and may
prevent the Fund from disposing of them promptly at reasonable prices. The Fund
may have to bear the expense of registering such securities for resale and the
risk of substantial delays in effecting such registration.
 
    The Securities and Exchange Commission has adopted Rule 144A under the
Securities Act, which permits the Fund to sell restricted securities to
qualified institutional buyers without limitation. The Investment Manager,
pursuant to procedures adopted by the Trustees of the Fund, will make a
determination as to the liquidity of each restricted security purchased by the
Fund. If a restricted security is determined to be "liquid," such security will
not be included within the category "illiquid securities," which is limited by
the Fund's investment restrictions to 10% of the Fund's total assets. Investing
in Rule 144A securities could have the effect of increasing the level of Fund
illiquidity to the extent the Fund, at a particular point in time, may be unable
to find qualified institutional buyers interested in purchasing such securities.
 
    LENDING OF PORTFOLIO SECURITIES.  Consistent with applicable regulatory
requirements, the Fund may lend its portfolio securities to brokers, dealers and
other financial institutions, provided that such loans are callable at any time
by the Fund (subject to certain notice provisions described in the Statement of
Additional Information), and are at all times secured by cash or cash
equivalents, which are maintained in a segregated account pursuant to applicable
regulations and that are at least equal to the market value, determined daily,
of the loaned securities.
 
PORTFOLIO MANAGEMENT
 
   
    The Fund's portfolio is actively managed by its Investment Manager with a
view to achieving the Fund's investment objective. In determining which
securities to purchase for the Fund or hold in the Fund's portfolio, the
Investment Manager will rely on information from various sources, including
research, analysis and appraisals of brokers and dealers; the views of Trustees
of the Fund and others regarding economic developments and interest rate trends;
and the Investment Manager's own analysis of factors it deems relevant. The
Fund's portfolio is managed within MSDW Advisors'
    
 
                                       12
<PAGE>
   
Taxable Income Group, which manages twenty-one funds and fund portfolios, with
approximately $14.1 billion in assets as of September 30, 1998. Rochelle G.
Siegel, Senior Vice President of MSDW Advisors and a member of MSDW Advisors'
Taxable Group, has been the primary portfolio manager since the Fund's inception
and has been a portfolio manager at MSDW Advisors since July, 1985.
    
 
   
    Pursuant to an order of the Securities and Exchange Commission, the Fund may
effect principal transactions in certain money market instruments with Dean
Witter Reynolds Inc. In addition, the Fund may incur brokerage commissions on
transactions conducted through Dean Witter Reynolds Inc., Morgan Stanley and Co.
Incorporated and other brokers and dealers that are affiliates of MSDW Advisors.
It is not anticipated that the portfolio trading will result in the Fund's
portfolio turnover rate exceeding 200%. A high portfolio turnover rate may
increase the Fund's capital gains, which are passed along to Fund shareholders
as distributions. This, in turn, may increase your tax liability as a Fund
shareholder. A more extensive discussion of the Fund's portfolio brokerage
policies is set forth in the Statement of Additional Information. Except as
specifically noted, all investment objectives, policies and practices discussed
above are not fundamental policies of the Fund and, as such, may be changed
without shareholder approval.
    
 
RISK CONSIDERATIONS
 
    An increase in prevailing levels of interest rates will generally reduce the
value of securities in the Fund's portfolio, while a decline in rates will
generally increase the value of these securities. As a result, the fluctuations
or changes in interest rates will cause the Fund's net asset value to rise and
fall, in an inverse relationship; however, the income received by the Fund from
its portfolio securities will not be affected. Because yields on debt securities
available for purchase by a Fund vary over time, no specific yield on shares of
the Fund can be assured. In addition, if the bonds in the Fund's portfolio
contain call, prepayment or redemption provisions, during a period of declining
interest rates, these securities are likely to be redeemed, and the Fund will
probably be unable to replace them with securities having an equal yield.
 
   
    YEAR 2000.  The investment management services provided to the Fund by the
Investment Manager and the services provided to shareholders by the Distributor
and the Transfer Agent depend on the smooth functioning of their computer
systems. Many computer software systems in use today cannot recognize the year
2000, but revert to 1900 or some other date, due to the manner in which dates
were encoded and calculated. That failure could have a negative impact on the
handling of securities trades, pricing and account services. The Investment
Manager, the Distributor and the Transfer Agent have been actively working on
necessary changes to their own computer systems to prepare for the year 2000 and
expect that their systems will be adapted before that date, but there can be no
assurance that they will be successful, or that interaction with other
non-complying computer systems will not impair their services at that time.
    
 
   
    In addition, it is possible that the markets for securities in which the
Fund invests may be detrimentally affected by computer failures throughout the
financial services industry beginning January 1, 2000. Improperly functioning
trading systems may result in settlement problems and liquidity issues. In
addition, corporate and governmental data processing errors may result in
production problems for individual companies and overall economic uncertainties.
Earnings of individual issuers will be affected by remediation costs, which may
be substantial and may be reported inconsistently in U.S. and foreign financial
statements. Accordingly, the Fund's investments may be adversely affected.
    
 
    For additional risk disclosure, please refer to the "Investment Objective
and Policies" section of the Prospectus and to the "Investment Practices and
Policies" section in the Statement of Additional Information.
 
                                       13
<PAGE>
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    The investment restrictions listed below are among the restrictions which
have been adopted by the Fund as fundamental policies. Under the Investment
Company Act of 1940, as amended (the "Act"), a fundamental policy may not be
changed without the vote of a majority of the outstanding voting securities of
the Fund, as defined in the Act. For purposes of the following limitations: (i)
all percentage limitations apply immediately after a purchase or initial
investment, and (ii) any subsequent change in any applicable percentage
resulting from market fluctuations or other changes in total or net assets does
not require elimination of any security from the portfolio.
 
    The Fund may not:
 
   1. Invest more than 5% of the value of its total assets in the securities of
any one issuer (other than obligations issued or guaranteed by the United States
Government, its agencies or instrumentalities).
 
   2. Purchase more than 10% of all outstanding voting securities or any class
of securities of any one issuer.
 
   3. Invest 25% or more of the value of its total assets in securities of
issuers in any one industry. This restriction does not apply to obligations
issued or guaranteed by the United States Government or its agencies or
instrumentalities.
 
   4. Invest more than 10% of its total assets in "illiquid securities"
(securities for which market quotations are not readily available) and
repurchase agreements which have a maturity of longer than seven days.
 
   5. Invest more than 5% of the value of its total assets in securities of
issuers having a record, together with predecessors, of less than three years of
continuous operation. This restriction shall not apply to any obligation issued
or guaranteed by the United States Government, its agencies or
instrumentalities.
 
   6. Borrow money, except that the Fund may borrow from banks for temporary or
emergency purposes in an amount up to 5% (taken at the lower of cost or current
value) of its total assets (not including the amount borrowed), and may enter
into reverse repurchase agreements in an amount not exceeding 10% of the Fund's
total assets.
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
GENERAL
 
   
    The Fund offers each class of its shares for sale to the public on a
continuous basis. Pursuant to a Distribution Agreement between the Fund and
Morgan Stanley Dean Witter Distributors Inc. ("MSDW Distributors" or the
"Distributor"), an affiliate of the Investment Manager, shares of the Fund are
distributed by the Distributor and offered by Dean Witter Reynolds Inc. ("DWR"),
a selected dealer and a subsidiary of Morgan Stanley Dean Witter & Co., and
other dealers who have entered into selected dealer agreements with the
Distributor ("Selected Broker-Dealers"). It is anticipated that DWR will undergo
a change of corporate name which is expected to incorporate the brand name of
"Morgan Stanley Dean Witter," pending approval of various regulatory
authorities. The principal executive office of the Distributor is located at Two
World Trade Center, New York, New York 10048.
    
 
    The Fund offers four classes of shares (each, a "Class"). Class A shares are
sold to investors with an initial sales charge that declines to zero for larger
 
                                       14
<PAGE>
   
purchases; however, Class A shares sold without an initial sales charge are
subject to a contingent deferred sales charge ("CDSC") of 1.0% if redeemed
within one year of purchase, except for certain specific circumstances. Class B
shares are sold without an initial sales charge but are subject to a CDSC
(scaled down from 5.0% to 1.0%) payable upon most redemptions within six years
after purchase. (Class B shares purchased by certain qualified plans are subject
to a CDSC scaled down from 2.0% to 1.0% if redeemed within three years after
purchase.) Class C shares are sold without an initial sales charge but are
subject to a CDSC of 1.0% on most redemptions made within one year after
purchase. Class D shares are sold without an initial sales charge or CDSC and
are available only to investors meeting an initial investment minimum of $5
million ($25 million for certain qualified plans), and to certain other limited
categories of investors. At the discretion of the Board of Trustees of the Fund,
Class A shares may be sold to categories of investors in addition to those set
forth in this prospectus at net asset value without a front-end sales charge,
and Class D shares may be sold to certain other categories of investors, in each
case as may be described in the then current prospectus of the Fund. See
"Alternative Purchase Arrangements--Selecting a Particular Class" for a
discussion of factors to consider in selecting which Class of shares to
purchase.
    
 
   
    The minimum initial purchase is $1,000 for each Class of shares, although
Class D shares are only available to persons investing $5 million ($25 million
for certain qualified plans), or more and to certain other limited categories of
investors. For the purpose of meeting the minimum $5 million (or $25 million)
initial investment for Class D shares, and subject to the $1,000 minimum initial
investment for each Class of the Fund, an investor's existing holdings of Class
A shares of the Fund and other Morgan Stanley Dean Witter Funds that are
multiple class funds ("Morgan Stanley Dean Witter Multi-Class Funds") and shares
of Morgan Stanley Dean Witter Funds sold with a front-end sales charge ("FSC
Funds") and concurrent investments in Class D shares of the Fund and other
Morgan Stanley Dean Witter Multi-Class Funds will be aggregated. Subsequent
purchases of $100 or more may be made by sending a check, payable to Morgan
Stanley Dean Witter Intermediate Income Securities, directly to Morgan Stanley
Dean Witter Trust FSB (the "Transfer Agent" or "MSDW Trust") at P.O. Box 1040,
Jersey City, NJ 07303 or by contacting a Morgan Stanley Dean Witter Financial
Advisor or other Selected Broker-Dealer representative. When purchasing shares
of the Fund, investors must specify whether the purchase is for Class A, Class
B, Class C or Class D shares. If no Class is specified, the Transfer Agent will
not process the transaction until the proper Class is identified. The minimum
initial purchase in the case of investments through EasyInvest-SM-, an automatic
purchase plan (see "Shareholder Services"), is $100, provided that the schedule
of automatic investments will result in investments totalling at least $1,000
within the first twelve months. The minimum initial purchase in the case of an
"Education IRA" is $500, if the Distributor has reason to believe that
additional investments will increase the investment in the account to $1,000
within three years. In the case of investments pursuant to (i) Systematic
Payroll Deduction Plans (including Individual Retirement Plans), (ii) the MSDW
Advisors mutual fund asset allocation program and (iii) fee-based programs
approved by the Distributor, pursuant to which participants pay an asset based
fee for services in the nature of investment advisory, administrative and/or
brokerage services, the Fund, in its discretion, may accept investments without
regard to any minimum amounts which would otherwise be required, provided, in
the case of Systematic Payroll Deduction Plans, that the Distributor has reason
to believe that additional investments will increase the investment in all
accounts under such Plans to at least $1,000. Certificates for shares purchased
will not be issued unless a request is made by the shareholder in writing to the
Transfer Agent.
    
 
    Shares of the Fund are sold through the Distributor on a normal three
business day settlement basis; that is, payment is due on the third business day
(settlement date) after the order is placed with
 
                                       15
<PAGE>
the Distributor. Shares of the Fund purchased through the Distributor are
entitled to dividends beginning on the next business day following settlement
date. Since DWR and other Selected Broker-Dealers forward investors' funds on
settlement date, they will benefit from the temporary use of the funds where
payment is made prior thereto. Shares purchased through the Transfer Agent are
entitled to dividends beginning on the next business day following receipt of an
order. As noted above, orders placed directly with the Transfer Agent must be
accompanied by payment. Investors will be entitled to receive capital gains
distributions if their order is received by the close of business on the day
prior to the record date for such distributions. Sales personnel of a Selected
Broker-Dealer are compensated for selling shares of the Fund at the time of
their sale by the Distributor or any of its affiliates and/or the Selected
Broker-Dealer. In addition, some sales personnel of the Selected Broker-Dealer
will receive various types of non-cash compensation as special sales incentives,
including trips, educational and/or business seminars and merchandise. The Fund
and the Distributor reserve the right to reject any purchase orders.
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
    The Fund offers several Classes of shares to investors designed to provide
them with the flexibility of selecting an investment best suited to their needs.
The general public is offered three Classes of shares: Class A shares, Class B
shares and Class C shares, which differ principally in terms of sales charges
and rate of expenses to which they are subject. A fourth Class of shares, Class
D shares, is offered only to limited categories of investors (see "No Load
Alternative--Class D Shares" below).
 
    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 except that Class A,
Class B and Class C shares bear the expenses of the ongoing shareholder service
fees, Class B and Class C shares bear the expenses of the ongoing distribution
fees and Class A, Class B and Class C shares which are redeemed subject to a
CDSC bear the expense of the additional incremental distribution costs resulting
from the CDSC applicable to shares of those Classes. The ongoing distribution
fees that are imposed on Class A, Class B and Class C shares will be imposed
directly against those Classes and not against all assets of the Fund and,
accordingly, such charges against one Class will not affect the net asset value
of any other Class or have any impact on investors choosing another sales charge
option. See "Plan of Distribution" and "Redemptions and Repurchases."
 
    Set forth below is a summary of the differences between the Classes and the
factors an investor should consider when selecting a particular Class. This
summary is qualified in its entirety by detailed discussion of each Class that
follows this summary.
 
    CLASS A SHARES.  Class A shares are sold at net asset value plus an initial
sales charge of up to 4.25%. The initial sales charge is reduced for certain
purchases. Investments of $1 million or more (and investments by certain other
limited categories of investors) are not subject to any sales charges at the
time of purchase but are subject to a CDSC of 1.0% on redemptions made within
one year after purchase, except for certain specific circumstances. Class A
shares are also subject to a 12b-1 fee of up to 0.25% of the average daily net
assets of the Class. See "Initial Sales Charge Alternative--Class A Shares."
 
   
    CLASS B SHARES.  Class B shares are offered at net asset value with no
initial sales charge but are subject to a CDSC (scaled down from 5.0% to 1.0%)
if redeemed within six years of purchase. (Class B shares purchased by certain
qualified plans are subject to a CDSC scaled down from 2.0% to 1.0% if redeemed
within three years after purchase.) This CDSC may be waived for certain
redemptions. Class B shares are also subject to an annual 12b-1 fee of 0.85% of
the lesser of: (a) the average daily aggregate gross sales of the Fund's Class B
shares
    
 
                                       16
<PAGE>
since the inception of the Fund (not including reinvestments of dividends or
capital gains distributions), less the average daily aggregate net asset value
of the Fund's Class B shares redeemed since the Fund's inception upon which a
CDSC has been imposed or waived, or (b) the average daily net assets of Class B.
The Class B shares' distribution fee will cause that Class to have higher
expenses and pay lower dividends than Class A or Class D shares.
 
    After approximately ten (10) years, Class B shares will convert
automatically to Class A shares of the Fund, based on the relative net asset
values of the shares of the two Classes on the conversion date. In addition, a
certain portion of Class B shares that have been acquired through the
reinvestment of dividends and distributions will be converted at that time. See
"Contingent Deferred Sales Charge Alternative--Class B Shares."
 
    CLASS C SHARES.  Class C shares are sold at net asset value with no initial
sales charge but are subject to a CDSC of 1.0% on redemptions made within one
year after purchase. This CDSC may be waived for certain redemptions. They are
subject to an annual 12b-1 fee of up to 0.85% of the average daily net assets of
the Class C shares. The Class C shares' distribution fee may cause that Class to
have higher expenses and pay lower dividends than Class A or Class D shares. See
"Level Load Alternative--Class C Shares."
 
    CLASS D SHARES.  Class D shares are available only to limited categories of
investors (see "No Load Alternative--Class D Shares" below). Class D shares are
sold at net asset value with no initial sales charge or CDSC. They are not
subject to any 12b-1 fees. See "No Load Alternative--Class D Shares."
 
    SELECTING A PARTICULAR CLASS.  In deciding which Class of Fund shares to
purchase, investors should consider the following factors, as well as any other
relevant facts and circumstances:
 
    The decision as to which Class of shares is more beneficial to an investor
depends on the amount and intended length of his or her investment. Investors
who prefer an initial sales charge alternative may elect to purchase Class A
shares. Investors qualifying for significantly reduced or, in the case of
purchases of $1 million or more, no initial sales charges may find Class A
shares particularly attractive because similar sales charge reductions are not
available with respect to Class B or Class C shares. Moreover, Class A shares
are subject to lower ongoing expenses than are Class B or Class C shares over
the term of the investment. As an alternative, Class B and Class C shares are
sold without any initial sales charge so the entire purchase price is
immediately invested in the Fund. Any investment return on these additional
investment amounts may partially or wholly offset the higher annual expenses of
these Classes. Because the Fund's future return cannot be predicted, however,
there can be no assurance that this would be the case.
 
    Finally, investors should consider the effect of the CDSC period and any
conversion rights of the Classes in the context of their own investment time
frame. For example, although Class C shares are subject to a significantly lower
CDSC upon redemptions, they do not, unlike Class B shares, convert into Class A
shares after approximately ten years, and, therefore, are subject to an ongoing
12b-1 fee of 0.85% (rather than the 0.25% fee applicable to Class A shares) for
an indefinite period of time. Thus, Class B shares may be more attractive than
Class C shares to investors with longer term investment outlooks. Other
investors, however, may elect to purchase Class C shares if, for example, they
determine that they do not wish to be subject to a front-end sales charge and
they are uncertain as to the length of time they intend to hold their shares.
 
   
    For the purpose of meeting the $5 million (or $25 million) minimum
investment amount for Class D shares, holdings of Class A shares in all Morgan
Stanley Dean Witter Multi-Class Funds, shares of FSC Funds and shares of Morgan
Stanley Dean Witter Funds for which such shares have been
    
 
                                       17
<PAGE>
exchanged will be included together with the current investment amount.
 
    Sales personnel may receive different compensation for selling each Class of
shares. Investors should understand that the purpose of a CDSC is the same as
that of the initial sales charge in that the sales charges applicable to each
Class provide for the financing of the distribution of shares of that Class.
 
    Set forth below is a chart comparing the sales charge, 12b-1 fees and
conversion options applicable to each Class of shares:
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------
                                              CONVERSION
  CLASS       SALES CHARGE     12b-1 FEE       FEATURE
<C>        <S>                 <C>         <C>
- -----------------------------------------------------------
    A      Maximum 4.25%         0.25%            No
           initial sales
           charge reduced for
           purchases of
           $25,000 and over;
           shares sold
           without an initial
           sales charge
           generally subject
           to a 1.0% CDSC
           during first year.
- -----------------------------------------------------------
    B      Maximum 5.0% CDSC     0.85%     B shares convert
           during the first                to A shares
           year decreasing to              automatically
           0 after six years               after
                                           approximately
                                           ten years
- -----------------------------------------------------------
    C      1.0% CDSC during      0.85%            No
           first year
- -----------------------------------------------------------
    D             None            None            No
</TABLE>
 
    See "Purchase of Fund Shares" and "The Fund and its Management" for a
complete description of the sales charges and service and distribution fees for
each Class of shares and "Determination of Net Asset Value," "Dividends,
Distributions and Taxes" and "Shareholder Services--Exchange Privilege" for
other differences between the Classes of shares.
 
INITIAL SALES CHARGE ALTERNATIVE--
CLASS A SHARES
 
    Class A shares are sold at net asset value plus an initial sales charge. In
some cases, reduced sales charges may be available, as described below.
Investments of $1 million or more (and investments by certain other limited
categories of investors) are not subject to any sales charges at the time of
purchase but are subject to a CDSC of 1.0% on redemptions made within one year
after purchase (calculated from the last day of the month in which the shares
were purchased), except for certain specific circumstances. The CDSC will be
assessed on an amount equal to the lesser of the current market value or the
cost of the shares being redeemed. The CDSC will not be imposed (i) in the
circumstances set forth below in the section "Contingent Deferred Sales Charge
Alternative--Class B Shares--CDSC Waivers," except that the references to six
years in the first paragraph of that section shall mean one year in the case of
Class A shares, and (ii) in the circumstances identified in the section
"Additional Net Asset Value Purchase Options" below. Class A shares are also
subject to an annual 12b-1 fee of up to 0.25% of the average daily net assets of
the Class.
 
    The offering price of Class A shares will be the net asset value per share
next determined following receipt of an order (see "Determination of Net Asset
Value" below), plus a sales charge (expressed as a percentage of the offering
price) on a single transaction as shown in the following table:
 
<TABLE>
<CAPTION>
                                          SALES CHARGE
                           ------------------------------------------
                              PERCENTAGE OF          APPROXIMATE
        AMOUNT OF            PUBLIC OFFERING    PERCENTAGE OF AMOUNT
   SINGLE TRANSACTION             PRICE               INVESTED
- -------------------------  -------------------  ---------------------
<S>                        <C>                  <C>
Less than $25,000........           4.25%                 4.44%
$25,000 but less
     than $50,000........           4.00%                 4.17%
$50,000 but less
     than $100,000.......           3.50%                 3.63%
$100,000 but less
     than $250,000.......           2.75%                 2.83%
$250,000 but less
     than $1 million.....           1.75%                 1.78%
$1 million and over......              0                     0
</TABLE>
 
                                       18
<PAGE>
    Upon notice to all Selected Broker-Dealers, the Distributor may reallow up
to the full applicable sales charge as shown in the above schedule during
periods specified in such notice. During periods when 90% or more of the sales
charge is reallowed, such Selected Broker-Dealers may be deemed to be
underwriters as that term is defined in the Securities Act of 1933.
 
    The above schedule of sales charges is applicable to purchases in a single
transaction by, among others: (a) an individual; (b) an individual, his or her
spouse and their children under the age of 21 purchasing shares for his, her or
their own accounts; (c) a trustee or other fiduciary purchasing shares for a
single trust estate or a single fiduciary account; (d) a pension, profit-sharing
or other employee benefit plan qualified or non-qualified under Section 401 of
the Internal Revenue Code; (e) tax-exempt organizations enumerated in Section
501(c)(3) or (13) of the Internal Revenue Code; (f) employee benefit plans
qualified under Section 401 of the Internal Revenue Code of a single employer or
of employers who are "affiliated persons" of each other within the meaning of
Section 2(a)(3)(c) of the Act; and for investments in Individual Retirement
Accounts of employees of a single employer through Systematic Payroll Deduction
plans; or (g) any other organized group of persons, whether incorporated or not,
provided the organization has been in existence for at least six months and has
some purpose other than the purchase of redeemable securities of a registered
investment company at a discount.
 
   
    COMBINED PURCHASE PRIVILEGE.  Investors may have the benefit of reduced
sales charges in accordance with the above schedule by combining purchases of
Class A shares of the Fund in single transactions with the purchase of Class A
shares of other Morgan Stanley Dean Witter Multi-Class Funds and shares of FSC
Funds. The sales charge payable on the purchase of the Class A shares of the
Fund, the Class A shares of the other Morgan Stanley Dean Witter Multi-Class
Funds and the shares of the FSC Funds will be at their respective rates
applicable to the total amount of the combined concurrent purchases of such
shares.
    
 
   
    RIGHT OF ACCUMULATION.  The above persons and entities may benefit from a
reduction of the sales charges in accordance with the above schedule if the
cumulative net asset value of Class A shares purchased in a single transaction,
together with shares of the Fund and other Morgan Stanley Dean Witter Funds
previously purchased at a price including a front-end sales charge (including
shares of the Fund and other Morgan Stanley Dean Witter Funds acquired in
exchange for those shares, and including in each case shares acquired through
reinvestment of dividends and distributions), which are held at the time of such
transaction, amounts to $25,000 or more. If such investor has a cumulative net
asset value of shares of FSC Funds and Class A and Class D shares that, together
with the current investment amount, is equal to at least $5 million ($25 million
for certain qualified plans), such investor is eligible to purchase Class D
shares subject to the $1,000 minimum initial investment requirement of that
Class of the Fund. See "No Load Alternative--Class D Shares" below.
    
 
    The Distributor must be notified by DWR or a Selected Broker-Dealer or the
shareholder at the time a purchase order is placed that the purchase qualifies
for the reduced charge under the Right of Accumulation. Similar notification
must be made in writing by the dealer or shareholder when such an order is
placed by mail. The reduced sales charge will not be granted if: (a) such
notification is not furnished at the time of the order; or (b) a review of the
records of the Selected Broker-Dealer or the Transfer Agent fails to confirm the
investor's represented holdings.
 
   
    LETTER OF INTENT.  The foregoing schedule of reduced sales charges will also
be available to investors who enter into a written Letter of Intent providing
for the purchase, within a thirteen-month period, of Class A shares of the Fund
from DWR or other Selected Broker-Dealers. The cost of Class A shares of the
Fund or shares of other Morgan
    
 
                                       19
<PAGE>
   
Stanley Dean Witter Funds which were previously purchased at a price including a
front-end sales charge during the 90-day period prior to the date of receipt by
the Distributor of the Letter of Intent, or of Class A shares of the Fund or
shares of other Morgan Stanley Dean Witter Funds acquired in exchange for shares
of such funds purchased during such period at a price including a front-end
sales charge, which are still owned by the shareholder, may also be included in
determining the applicable reduction.
    
 
    ADDITIONAL NET ASSET VALUE PURCHASE OPTIONS. In addition to investments of
$1 million or more, Class A shares also may be purchased at net asset value by
the following:
 
   
    (1) trusts for which MSDW Trust (which is an affiliate of the Investment
Manager) provides discretionary trustee services;
    
 
   
    (2) persons participating in a fee-based program approved by the
Distributor, pursuant to which such persons pay an asset based fee for services
in the nature of investment advisory, administrative and/or brokerage services
(such investments are subject to all of the terms and conditions of such
programs, which may include termination fees, mandatory redemption upon
termination and such other circumstances as specified in the programs'
agreements, and restrictions on transferability of Fund shares);
    
 
   
    (3) employer-sponsored 401(k) and other plans qualified under Section 401(a)
of the Internal Revenue Code ("Qualified Retirement Plans") with at least 200
eligible employees and for which MSDW Trust serves as Trustee or DWR's
Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement;
    
 
   
    (4) Qualified Retirement Plans for which MSDW Trust serves as Trustee or
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement whose Class B shares have converted to Class A
shares, regardless of the plan's asset size or number of eligible employees;
    
 
   
    (5) investors who are clients of a Morgan Stanley Dean Witter Financial
Advisor who joined Morgan Stanley Dean Witter from another investment firm
within six months prior to the date of purchase of Fund shares by such
investors, if the shares are being purchased with the proceeds from a redemption
of shares of an open-end proprietary mutual fund of the Financial Advisor's
previous firm which imposed either a front-end or deferred sales charge,
provided such purchase was made within sixty days after the redemption and the
proceeds of the redemption had been maintained in the interim in cash or a money
market fund; and
    
 
    (6) other categories of investors, at the discretion of the Board, as
disclosed in the then current prospectus of the Fund.
 
    No CDSC will be imposed on redemptions of shares purchased pursuant to
paragraphs (1), (2) or (5), above.
 
    For further information concerning purchases of the Fund's shares, contact
DWR or another Selected Broker-Dealer or consult the Statement of Additional
Information.
 
CONTINGENT DEFERRED SALES CHARGE
ALTERNATIVE--CLASS B SHARES
 
   
    Class B shares are sold at net asset value next determined without an
initial sales charge so that the full amount of an investor's purchase payment
may be immediately invested in the Fund. A CDSC, however, will be imposed on
most Class B shares redeemed within six years after purchase. The CDSC will be
imposed on any redemption of shares if after such redemption the aggregate
current value of a Class B account with the Fund falls below the aggregate
amount of the investor's purchase payments for Class B shares made during the
six years (or, in the case of shares held by certain Qualified Retirement Plans,
three years) preceding the redemption. In addition, Class B shares are subject
to an annual 12b-1 fee of 0.85% of the lesser
    
 
                                       20
<PAGE>
of: (a) the average daily aggregate gross sales of the Fund's Class B shares
since the inception of the Fund (not including reinvestments of dividends or
capital gains distributions), less the average daily aggregate net asset value
of the Fund's Class B shares redeemed since the Fund's inception upon which a
CDSC has been imposed or waived, or (b) the average daily net assets of Class B.
 
    Except as noted below, Class B shares of the Fund which are held for six
years or more after purchase (calculated from the last day of the month in which
the shares were purchased) will not be subject to any CDSC upon redemption.
Shares redeemed earlier than six years after purchase may, however, be subject
to a CDSC which will be a percentage of the dollar amount of shares redeemed and
will be assessed on an amount equal to the lesser of the current market value or
the cost of the shares being redeemed. The size of this percentage will depend
upon how long the shares have been held, as set forth in the following table:
 
<TABLE>
<CAPTION>
         YEAR SINCE PURCHASE            CDSC AS A PERCENTAGE
             PAYMENT MADE                OF AMOUNT REDEEMED
- --------------------------------------  ---------------------
<S>                                     <C>
First.................................          5.0%
Second................................          4.0%
Third.................................          3.0%
Fourth................................          2.0%
Fifth.................................          2.0%
Sixth.................................          1.0%
Seventh and thereafter................          None
</TABLE>
 
   
    In the case of Class B shares of the Fund purchased on or after July 28,
1997 by Qualified Retirement Plans for which MSDW Trust serves as Trustee or
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement, shares held for three years or more after
purchase (calculated as described in the paragraph above) will not be subject to
any CDSC upon redemption. However, shares redeemed earlier than three years
after purchase may be subject to a CDSC (calculated as described in the
paragraph above), the percentage of which will depend on how long the shares
have been held, as set forth in the following table:
    
 
<TABLE>
<CAPTION>
         YEAR SINCE PURCHASE            CDSC AS A PERCENTAGE
             PAYMENT MADE                OF AMOUNT REDEEMED
- --------------------------------------  ---------------------
<S>                                     <C>
First.................................          2.0%
Second................................          2.0%
Third.................................          1.0%
Fourth and thereafter.................          None
</TABLE>
 
   
    CDSC WAIVERS.  A CDSC will not be imposed on: (i) any amount which
represents an increase in value of shares purchased within the six years (or, in
the case of shares held by certain Qualified Retirement Plans, three years)
preceding the redemption; (ii) the current net asset value of shares purchased
more than six years (or, in the case of shares held by certain Qualified
Retirement Plans, three years) prior to the redemption; and (iii) the current
net asset value of shares purchased through reinvestment of dividends or
distributions and/or shares acquired in exchange for shares of FSC Funds or of
other Morgan Stanley Dean Witter Funds acquired in exchange for such shares.
Moreover, in determining whether a CDSC is applicable it will be assumed that
amounts described in (i), (ii) and (iii) above (in that order) are redeemed
first.
    
 
    In addition, the CDSC, if otherwise applicable, will be waived in the case
of:
 
    (1) redemptions of shares held at the time a shareholder dies or becomes
disabled, only if the shares are:  (a) registered either in the name of an
individual shareholder (not a trust), or in the names of such shareholder and
his or her spouse as joint tenants with right of survivorship; or  (b) held in a
qualified corporate or self-employed retirement plan, Individual Retirement
Account ("IRA") or Custodial Account under Section 403(b)(7) of the Internal
Revenue Code ("403(b) Custodial Account"), provided in either case that the
redemption is requested within one year of the death or initial determination of
disability;
 
    (2) redemptions in connection with the following retirement plan
distributions:  (a) lump-sum or
 
                                       21
<PAGE>
   
other distributions from a qualified corporate or self-employed retirement plan
following retirement (or, in the case of a "key employee" of a "top heavy" plan,
following attainment of age 59 1/2); (b) distributions from an IRA or 403(b)
Custodial Account following attainment of age 59 1/2; or  (c) a tax-free return
of an excess contribution to an IRA;
    
 
   
    (3) all redemptions of shares held for the benefit of a participant in a
Qualified Retirement Plan which offers investment companies managed by the
Investment Manager or its subsidiary, MSDW Services, as self-directed investment
alternatives and for which MSDW Trust serves as Trustee or DWR's Retirement Plan
Services serves as recordkeeper pursuant to a written Recordkeeping Services
Agreement ("Eligible Plan"), provided that either:  (a) the plan continues to be
an Eligible Plan after the redemption; or  (b) the redemption is in connection
with the complete termination of the plan involving the distribution of all plan
assets to participants; and
    
 
   
    (4) certain redemptions pursuant to the Fund's Systematic Withdrawal Plan
(see "Shareholder Services--Systematic Withdrawal Plan").
    
 
    With reference to (1) above, for the purpose of determining disability, the
Distributor utilizes the definition of disability contained in Section 72(m)(7)
of the Internal Revenue Code, which relates to the inability to engage in
gainful employment. With reference to (2) above, the term "distribution" does
not encompass a direct transfer of IRA, 403(b) Custodial Account or retirement
plan assets to a successor custodian or trustee. All waivers will be granted
only following receipt by the Distributor of confirmation of the shareholder's
entitlement.
 
   
    CONVERSION TO CLASS A SHARES.  All shares of the Fund held prior to July 28,
1997 (other than shares held by certain employee benefit plans established by
DWR and its affiliate, SPS Transaction Services, Inc.) have been designated
Class B shares. Shares held before May 1, 1997 that have been designated Class B
shares will convert to Class A shares in May, 2007. In all other instances Class
B shares will convert automatically to Class A shares, based on the relative net
asset values of the shares of the two Classes on the conversion date, which will
be approximately ten (10) years after the date of the original purchase. The ten
year period is calculated from the last day of the month in which the shares
were purchased or, in the case of Class B shares acquired through an exchange or
a series of exchanges, from the last day of the month in which the original
Class B shares were purchased, provided that shares originally purchased before
May 1, 1997 will convert to Class A shares in May, 2007. The conversion of
shares purchased on or after May 1, 1997 will take place in the month following
the tenth anniversary of the purchase. There will also be converted at that time
such proportion of Class B shares acquired through automatic reinvestment of
dividends and distributions owned by the shareholder as the total number of his
or her Class B shares converting at the time bears to the total number of
outstanding Class B shares purchased and owned by the shareholder. In the case
of Class B shares held by a Qualified Retirement Plan for which MSDW Trust
serves as Trustee or DWR's Retirement Plan Services serves as recordkeeper
pursuant to a written Recordkeeping Services Agreement, the plan is treated as a
single investor and all Class B shares will convert to Class A shares on the
conversion date of the first shares of a Morgan Stanley Dean Witter Multi-Class
Fund purchased by that plan. In the case of Class B shares previously exchanged
for shares of an "Exchange Fund" (see "Shareholder Services-- Exchange
Privilege"), the period of time the shares were held in the Exchange Fund
(calculated from the last day of the month in which the Exchange Fund shares
were acquired) is excluded from the holding period for conversion. If those
shares are subsequently re-exchanged for Class B shares of a Morgan Stanley Dean
Witter Multi-Class Fund, the holding period resumes on the last day of the month
in which Class B shares are reacquired.
    
 
    If a shareholder has received share certificates for Class B shares, such
certificates must be delivered to the Transfer Agent at least one week prior to
the date for conversion. Class B shares evidenced by
 
                                       22
<PAGE>
share certificates that are not received by the Transfer Agent at least one week
prior to any conversion date will be converted into Class A shares on the next
scheduled conversion date after such certificates are received.
 
    Effectiveness of the conversion feature is subject to the continuing
availability of a ruling of the Internal Revenue Service or an opinion of
counsel that (i) the conversion of shares does not constitute a taxable event
under the Internal Revenue Code, (ii) Class A shares received on conversion will
have a basis equal to the shareholder's basis in the converted Class B shares
immediately prior to the conversion, and (iii) Class A shares received on
conversion will have a holding period that includes the holding period of the
converted Class B shares. The conversion feature may be suspended if the ruling
or opinion is no longer available. In such event, Class B shares would continue
to be subject to Class B 12b-1 fees.
 
LEVEL LOAD ALTERNATIVE--CLASS C SHARES
 
    Class C shares are sold at net asset value next determined without an
initial sales charge but are subject to a CDSC of 1.0% on most redemptions made
within one year after purchase (calculated from the last day of the month in
which the shares were purchased). The CDSC will be assessed on an amount equal
to the lesser of the current market value or the cost of the shares being
redeemed. The CDSC will not be imposed in the circumstances set forth above in
the section "Contingent Deferred Sales Charge Alternative--Class B Shares--CDSC
Waivers," except that the references to six years in the first paragraph of that
section shall mean one year in the case of Class C shares. Class C shares are
subject to an annual 12b-1 fee of up to 0.85% of the average daily net assets of
the Class. Unlike Class B shares, Class C shares have no conversion feature and,
accordingly, an investor that purchases Class C shares will be subject to 12b-1
fees applicable to Class C shares for an indefinite period subject to annual
approval by the Fund's Board of Trustees and regulatory limitations.
 
NO LOAD ALTERNATIVE--CLASS D SHARES
 
   
    Class D shares are offered without any sales charge on purchase or
redemption and without any 12b-1 fee. Class D shares are offered only to
investors meeting an initial investment minimum of $5 million ($25 million for
Qualified Retirement Plans for which MSDW Trust serves as Trustee or DWR's
Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement) and the following categories of investors: (i)
investors participating in the MSDW Advisors mutual fund asset allocation
program pursuant to which such persons pay an asset based fee; (ii) persons
participating in a fee-based program approved by the Distributor, pursuant to
which such persons pay an asset based fee for services in the nature of
investment advisory, administrative and/or brokerage services (subject to all of
the terms and conditions of such programs, referred to in (i) and (ii) above,
which may include termination fees, mandatory redemption upon termination and
such other circumstances as specified in the programs agreements, and
restrictions on transferability of Fund shares); (iii) employee benefit plans
maintained by Morgan Stanley Dean Witter & Co. or any of its subsidiaries for
the benefit of certain employees of Morgan Stanley Dean Witter & Co. and its
subsidiaries; (iv) certain Unit Investment Trusts sponsored by DWR; (v) certain
other open-end investment companies whose shares are distributed by the
Distributor; (vi) investors who were shareholders of Dean Witter Retirement
Series on September 11, 1998 (with respect to additional purchases for their
former Dean Witter Retirement Series accounts); and (vii) other categories of
investors, at the discretion of the Board, as disclosed in the then current
prospectus of the Fund. Investors who require a $5 million (or $25 million)
minimum initial investment to qualify to purchase Class D shares may satisfy
that requirement by investing that amount in a single transaction in Class D
shares of the Fund and other Morgan Stanley Dean Witter Multi-Class Funds,
subject to the $1,000 minimum initial investment required for that Class of the
Fund. In addition, for the purpose of meeting the $5 million (or $25 million)
minimum
    
 
                                       23
<PAGE>
   
investment amount, holdings of Class A shares in all Morgan Stanley Dean Witter
Multi-Class Funds, shares of FSC Funds and shares of Morgan Stanley Dean Witter
Funds for which such shares have been exchanged will be included together with
the current investment amount. If a shareholder redeems Class A shares and
purchases Class D shares, such redemption may be a taxable event.
    
 
PLAN OF DISTRIBUTION
 
    The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under the
Act with respect to the distribution of Class A, Class B and Class C shares of
the Fund. In the case of Class A and Class C shares, the Plan provides that the
Fund will reimburse the Distributor and others for the expenses of certain
activities and services incurred by them specifically on behalf of those shares.
Reimbursements for these expenses will be made in monthly payments by the Fund
to the Distributor, which will in no event exceed amounts equal to payments at
the annual rates of 0.25% and 0.85% of the average daily net assets of Class A
and Class C, respectively. In the case of Class B shares, the Plan provides that
the Fund will pay the Distributor a fee, which is accrued daily and paid
monthly, at the annual rate of 0.85% of the lesser of: (a) the average daily
aggregate gross sales of the Fund's Class B shares since the inception of the
Fund (not including reinvestments of dividends or capital gains distributions),
less the average daily aggregate net asset value of the Fund's Class B shares
redeemed since the Fund's inception upon which a CDSC has been imposed or
waived, or (b) the average daily net assets of Class B. The fee is treated by
the Fund as an expense in the year it is accrued. In the case of Class A shares,
the entire amount of the fee currently represents a service fee within the
meaning of the NASD guidelines. In the case of Class B and Class C shares, a
portion of the fee payable pursuant to the Plan, equal to 0.20% and 0.25% of the
average daily net assets of each of these Classes, respectively, is currently
characterized as a service fee. A service fee is a payment made for personal
service and/or the maintenance of shareholder accounts.
 
   
    Additional amounts paid under the Plan in the case of Class B and Class C
shares are paid to the Distributor for services provided and the expenses borne
by the Distributor and others in the distribution of the shares of those
Classes, including the payment of commissions for sales of the shares of those
Classes and incentive compensation to and expenses of Morgan Stanley Dean Witter
Financial Advisors and others who engage in or support distribution of shares or
who service shareholder accounts, including overhead and telephone expenses;
printing and distribution of prospectuses and reports used in connection with
the offering of the Fund's shares to other than current shareholders; and
preparation, printing and distribution of sales literature and advertising
materials. In addition, the Distributor may utilize fees paid pursuant to the
Plan in the case of Class B shares to compensate DWR and other Selected
Broker-Dealers for their opportunity costs in advancing such amounts, which
compensation would be in the form of a carrying charge on any unreimbursed
expenses.
    
 
   
    For the fiscal year ended August 31, 1998, Class B shares of the Fund
accrued payments under the Plan amounting to $1,300,714, which amount is equal
to 0.85% of the average daily net assets of Class B for the fiscal year. These
payments were calculated pursuant to clause (b) of the compensation formula
under the Plan. For the fiscal year ended August 31, 1998, Class A and Class C
shares of the Fund accrued payments under the Plan amounting to $4,202 and
$1,925, respectively, which amounts are equal to 0.24% and 0.85% of the average
daily net assets of Class A and Class C, respectively, for the fiscal year.
    
 
   
    In the case of Class B shares, at any given time, the expenses in
distributing Class B shares of the Fund may be in excess of the total of (i) the
payments made by the Fund pursuant to the Plan, and (ii) the proceeds of CDSCs
paid by investors upon the redemption of Class B shares. For example, if $1
million in expenses in distributing Class B shares of the Fund had been incurred
and $750,000 had been received as described in (i) and (ii) above, the excess
    
 
                                       24
<PAGE>
   
expense would amount to $250,000. The Distributor has advised the Fund that such
excess amounts, including the carrying charge described above, totalled
$5,232,570 at August 31, 1998, which was equal to 3.45% of the net assets of
Class B on such date. Because there is no requirement under the Plan that the
Distributor be reimbursed for all distribution expenses or any requirement that
the Plan be continued from year to year, such excess amount does not constitute
a liability of the Fund. Although there is no legal obligation for the Fund to
pay expenses incurred in excess of payments made to the Distributor under the
Plan, and the proceeds of CDSCs paid by investors upon redemption of shares, if
for any reason the Plan is terminated the Trustees will consider at that time
the manner in which to treat such expenses. Any cumulative expenses incurred,
but not yet recovered through distribution fees or CDSCs, may or may not be
recovered through future distribution fees or CDSCs.
    
 
   
    In the case of Class A and Class C shares, expenses incurred pursuant to the
Plan in any calendar year in excess of 0.25% or 0.85% of the average daily net
assets of Class A or Class C, respectively, will not be reimbursed by the Fund
through payments in any subsequent year, except that expenses representing a
gross sales commission credited to Morgan Stanley Dean Witter Financial Advisors
and other Selected Broker-Dealer representatives at the time of sale may be
reimbursed in the subsequent calendar year. The Distributor has advised the Fund
that unreimbursed expenses representing a gross sales commission credited to
Morgan Stanley Dean Witter Financial Advisors and other Selected Broker-Dealer
representatives at the time of sale totalled $2,528 in the case of Class C at
December 31, 1997, which was equal to 1.05% of the net assets of Class C on such
date, and that there were no such expenses which may be reimbursed in the
subsequent year in the case of Class A on such date. No interest or other
financing charges will be incurred on any Class A or Class C distribution
expenses incurred by the Distributor under the Plan or on any unreimbursed
expenses due to the Distributor pursuant to the Plan.
    
 
DETERMINATION OF NET ASSET VALUE
 
    The net asset value per share is determined once daily at 4:00 p.m., New
York time (or, on days when the New York Stock Exchange closes prior to 4:00
p.m., at such earlier time), on each day that the New York Stock Exchange is
open by taking the net assets of the Fund, dividing by the number of shares
outstanding and adjusting to the nearest cent. The assets belonging to the Class
A, Class B, Class C and Class D shares will be invested together in a single
portfolio. The net asset value of each Class, however, will be determined
separately by subtracting each Class's accrued expenses and liabilities. The net
asset value per share will not be determined on Good Friday and on such other
federal and non-federal holidays as are observed by the New York Stock Exchange.
 
    In the calculation of the Fund's net asset value: (1) an equity portfolio
security listed or traded on the New York or American Stock Exchange or other
domestic or foreign exchange is valued at its latest sale price on that exchange
prior to the time assets are valued; if there were no sales that day, the
security is valued at the latest bid price (in cases where a security is traded
on more than one exchange, the security is valued on the exchange designated as
the primary market pursuant to procedures adopted by the Trustees); and (2) all
portfolio securities for which over-the-counter market quotations are readily
available are valued at the latest bid price. When market quotations are not
readily available, including circumstances under which it is determined by the
Investment Manager that sale and bid prices are not reflective of a security's
market value, portfolio securities are valued at their fair value as determined
in good faith under procedures established by and under the general supervision
of the Board of Trustees.
 
    Certain of the Fund's portfolio securities may be valued by an outside
pricing service approved by the Fund's Trustees. The pricing service may utilize
a matrix system incorporating security quality, maturity and coupon as the
evaluation model parameters, and/or research evaluations by its staff, including
 
                                       25
<PAGE>
review of broker-dealer market price quotations, in determining what it believes
is the fair valuation of the portfolio securities valued by such pricing
service. (See "Determination of Net Asset Value" in the Statement of Additional
Information.)
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
   
    AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS.  All income dividends
and capital gains distributions are automatically paid in full and fractional
shares of the applicable Class of the Fund (or, if specified by the shareholder,
in shares of any other open-end Morgan Stanley Dean Witter Fund), unless the
shareholder requests that they be paid in cash. Shares so acquired are acquired
at net asset value and are not subject to the imposition of a front-end sales
charge or a CDSC (see "Redemptions and Repurchases"). Such dividends and
distributions will be paid, at the net asset value per share (without sales
charge), in shares of the applicable Class of the Fund (or in cash if the
shareholder so requests) on the monthly payment date, which will be no later
than the last business day of the month for which the dividend or distribution
is payable. Processing of dividend checks begins immediately following the
monthly payment date. Shareholders who have requested to receive dividends in
cash will normally receive their monthly dividend check during the first ten
days of the following month.
    
 
   
    EASYINVEST-SM-.  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
transferred automatically from a checking or savings account, or following
redemption of shares of a Morgan Stanley Dean Witter money market fund, on a
semi-monthly, monthly or quarterly basis, to the Fund's Transfer Agent for
investment in shares of the Fund (see "Purchases of Fund Shares" and
"Redemptions and Repurchases--Involuntary Redemption").
    
 
    INVESTMENT OF DIVIDENDS OR DISTRIBUTIONS RECEIVED IN CASH.  Any shareholder
who receives a cash payment representing a dividend or capital gains
distribution may invest such dividend or distribution in shares of the
applicable Class at the net asset value per share next determined after receipt
by the Transfer Agent, by returning the check or the proceeds to the Transfer
Agent within thirty days after the payment date. Shares so acquired are acquired
at net asset value and are not subject to the imposition of a front-end sales
charge or a CDSC (see "Redemptions and Repurchases").
 
   
    SYSTEMATIC WITHDRAWAL PLAN.  A systematic withdrawal plan (the "Withdrawal
Plan") is available for shareholders whose shares of Morgan Stanley Dean Witter
Funds have an aggregate value of $10,000 or more. Shares of any Fund from which
redemptions will be made pursuant to the Plan must have a value of $1,000 or
more (referred to as a "SWP Fund"). The required share values are determined on
the date the shareholder establishes the Withdrawal Plan. The Withdrawal Plan
provides for monthly, quarterly, semi-annual or annual payments in any amount
not less than $25, or in any whole percentage of the value of the SWP Funds'
shares, on an annualized basis. Any applicable CDSC will be imposed on shares
redeemed under the Withdrawal Plan (see "Purchase of Fund Shares"), except that
the CDSC, if any, will be waived on redemptions under the Withdrawal Plan of up
to 12% annually of the value of each SWP Fund account, based on the share values
next determined after the shareholder establishes the Withdrawal Plan.
Redemptions for which this CDSC waiver policy applies may be in amounts up to 1%
per month, 3% per quarter, 6% semi-annually or 12% annually. Under this CDSC
waiver policy, amounts withdrawn each period will be paid by first redeeming
shares not subject to a CDSC because the shares were purchased by the
reinvestment of dividends or capital gains distributions, the CDSC period has
elapsed or some other waiver of the CDSC applies. If shares subject to a CDSC
must be redeemed, shares held for the longest period of time will be redeemed
first and continuing with shares
    
 
                                       26
<PAGE>
   
held the next longest period of time until shares held the shortest period of
time are redeemed. Any shareholder participating in the Withdrawal Plan will
have sufficient shares redeemed from his or her account so that the proceeds
(net of any applicable CDSC) to the shareholder will be the designated monthly,
quarterly, semi-annual or annual amount.
    
 
   
    A shareholder may suspend or terminate participation in the Withdrawal Plan
at any time. A shareholder who has suspended participation may resume payments
under the Withdrawal Plan, without requiring a new determination of the account
value for the 12% CDSC waiver. The Withdrawal Plan may be terminated or revised
at any time by the Fund.
    
 
   
    Prior to adding an additional SWP Fund to an existing Withdrawal Plan, the
required $10,000/$1,000 share values must be met, to be calculated on the date
the shareholder adds the additional SWP Fund. However, the addition of a new SWP
Fund will not change the account value for the 12% CDSC waiver for the SWP Funds
already participating in the Withdrawal Plan.
    
 
   
    Withdrawal Plan payments should not be considered dividends, yields or
income. If periodic Withdrawal Plan payments continuously exceed net investment
income and net capital gains, the shareholder's original investment will be
correspondingly reduced and ultimately exhausted. Each withdrawal constitutes a
redemption of shares and any gain or loss realized must be recognized for
federal income tax purposes.
    
 
   
    Shareholders should contact their Morgan Stanley Dean Witter Financial
Advisor or other Selected Broker-Dealer representative or the Transfer Agent for
further information about any of the above services.
    
 
   
    TAX-SHELTERED RETIREMENT PLANS.  Retirement plans are available for use by
corporations, the self-employed, eligible Individual Retirement Accounts and
Custodial Accounts under Section 403(b)(7) of the Internal Revenue Code.
Adoption of such plans should be on advice of legal counsel or tax advisor.
    
 
   
    For further information regarding plan administration, custodial fees and
other details, investors should contact their Morgan Stanley Dean Witter
Financial Advisor or other Selected Broker-Dealer representative or the Transfer
Agent.
    
 
EXCHANGE PRIVILEGE
 
   
    Shares of each Class may be exchanged for shares of the same Class of any
other Morgan Stanley Dean Witter Multi-Class Fund without the imposition of any
exchange fee. Shares may also be exchanged for shares of the following funds:
Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust, Morgan Stanley Dean
Witter Limited Term Municipal Trust, Morgan Stanley Dean Witter Short-Term Bond
Fund and five Morgan Stanley Dean Witter Funds which are money market funds (the
"Exchange Funds"). Class A shares may also be exchanged for shares of Morgan
Stanley Dean Witter Multi-State Municipal Series Trust and Morgan Stanley Dean
Witter Hawaii Municipal Trust, which are Morgan Stanley Dean Witter Funds sold
with a front-end sales charge ("FSC Funds"). Exchanges may be made after the
shares of the Fund acquired by purchase (not by exchange or dividend
reinvestment) have been held for thirty days. There is no waiting period for
exchanges of shares acquired by exchange or dividend reinvestment.
    
 
   
    An exchange to another Morgan Stanley Dean Witter Multi-Class Fund, any FSC
Fund or any Exchange Fund that is not a money market fund is on the basis of the
next calculated net asset value per share of each fund after the exchange order
is received. When exchanging into a money market fund from the Fund, shares of
the Fund are redeemed out of the Fund at their next calculated net asset value
and the proceeds of the redemption are used to purchase shares of the money
market fund at their net asset value determined the following business day.
Subsequent exchanges between any of the Morgan Stanley Dean Witter Multi-Class
Funds, FSC Funds or any Exchange Fund that is not a
    
 
                                       27
<PAGE>
money market fund can be effected on the same basis.
 
   
    No CDSC is imposed at the time of any exchange of shares, although any
applicable CDSC will be imposed upon ultimate redemption. During the period of
time the shareholder remains in an Exchange Fund (calculated from the last day
of the month in which the Exchange Fund shares were acquired), the holding
period (for the purpose of determining the rate of the CDSC) is frozen. If those
shares are subsequently re-exchanged for shares of a Morgan Stanley Dean Witter
Multi-Class Fund, the holding period previously frozen when the first exchange
was made resumes on the last day of the month in which shares of a Morgan
Stanley Dean Witter Multi-Class Fund are reacquired. Thus, the CDSC is based
upon the time (calculated as described above) the shareholder was invested in
shares of a Morgan Stanley Dean Witter Multi-Class Fund (see "Purchase of Fund
Shares"). In the case of exchanges of Class A shares which are subject to a
CDSC, the holding period also includes the time (calculated as described above)
the shareholder was invested in shares of a FSC Fund. In the case of shares
exchanged into an Exchange Fund on or after April 23, 1990, upon a redemption of
shares which results in a CDSC being imposed, a credit (not to exceed the amount
of the CDSC) will be given in an amount equal to the Exchange Fund 12b-1
distribution fees incurred on or after that date which are attributable to those
shares. (Exchange Fund 12b-1 distribution fees are described in the prospectuses
for those funds.) Class B shares of the Fund acquired in exchange for Class B
shares of another Morgan Stanley Dean Witter Multi-Class Fund having a different
CDSC schedule than that of this Fund will be subject to the higher CDSC
schedule, even if such shares are subsequently re-exchanged for shares of the
fund with the lower CDSC schedule.
    
 
   
    ADDITIONAL INFORMATION REGARDING EXCHANGES. Purchases and exchanges should
be made for investment purposes only. A pattern of frequent exchanges may be
deemed by the Investment Manager to be abusive and contrary to the best
interests of the Fund's other shareholders and, at the Investment Manager's
discretion, may be limited by the Fund's refusal to accept additional purchases
and/or exchanges from the investor. Although the Fund does not have any specific
definition of what constitutes a pattern of frequent exchanges, and will
consider all relevant factors in determining whether a particular situation is
abusive and contrary to the best interests of the Fund and its other
shareholders, investors should be aware that the Fund and each of the other
Morgan Stanley Dean Witter Funds may in their discretion limit or otherwise
restrict the number of times this Exchange Privilege may be exercised by any
investor. Any such restriction will be made by the Fund on a prospective basis
only, upon notice of the shareholder not later than ten days following such
shareholder's most recent exchange. Also, the Exchange Privilege may be
terminated or revised at any time by the Fund and/or any of such Morgan Stanley
Dean Witter Funds for which shares of the Fund have been exchanged, upon such
notice as may be required by applicable regulatory agencies. Shareholders
maintaining margin accounts with DWR or another Selected Broker-Dealer are
referred to their Morgan Stanley Dean Witter Financial Advisor or other Selected
Broker-Dealer representative regarding restrictions on exchange of shares of the
Fund pledged in the margin account.
    
 
    The current prospectus for each fund describes its investment objective and
policies, and shareholders should obtain a copy and examine it carefully before
investing. Exchanges are subject to the minimum investment requirement of each
Class of shares and any other conditions imposed by each fund. In the case of a
shareholder holding a share certificate or certificates, no exchanges may be
made until all applicable share certificates have been received by the Transfer
Agent and deposited in the shareholder's account. An exchange will be treated
for federal income tax purposes the same as a repurchase or redemption of
shares, on which the shareholder may realize a capital gain or loss. However,
the ability to deduct capital losses on an exchange may be limited in situations
where there is an exchange of shares within ninety days after the
 
                                       28
<PAGE>
shares are purchased. The Exchange Privilege is only available in states where
an exchange may legally be made.
 
   
    If DWR or another Selected Broker-Dealer is the current dealer of record and
its account numbers are part of the account information, shareholders may
initiate an exchange of shares of the Fund for shares of any of the Morgan
Stanley Dean Witter Funds (for which the Exchange Privilege is available)
pursuant to this Exchange Privilege by contacting their Morgan Stanley Dean
Witter Financial Advisor or other Selected Broker-Dealer representative (no
Exchange Privilege Authorization Form is required). Other shareholders (and
those shareholders who are clients of DWR or other Selected Broker-Dealers but
who wish to make exchanges directly by writing or telephoning the Transfer
Agent) must complete and forward to the Transfer Agent an Exchange Privilege
Authorization Form, copies of which may be obtained from the Transfer Agent, to
initiate an exchange. If the Authorization Form is used, exchanges may be made
in writing or by contacting the Transfer Agent at (800) 869-NEWS (toll-free).
    
 
    The Fund will employ reasonable procedures to confirm that exchange
instructions communicated over the telephone are genuine. Such procedures may
include requiring various forms of personal identification such as name, mailing
address, social security or other tax identification number and DWR or other
Selected Broker-Dealer account number (if any). Telephone instructions may also
be recorded. If such procedures are not employed, the Fund may be liable for any
losses due to unauthorized or fraudulent instructions.
 
   
    Telephone exchange instructions will be accepted if received by the Transfer
Agent between 9:00 a.m. and 4:00 p.m., New York time, on any day the New York
Stock Exchange is open. Any shareholder wishing to make an exchange who has
previously filed an Exchange Privilege Authorization Form and who is unable to
reach the Fund by telephone should contact his or her Morgan Stanley Dean Witter
Financial Advisor or other Selected Broker-Dealer representative, if
appropriate, or make a written exchange request. Shareholders are advised that
during periods of drastic economic or market changes, it is possible that the
telephone exchange procedures may be difficult to implement, although this has
not been the experience with the Morgan Stanley Dean Witter Funds in the past.
    
 
   
    For further information regarding the Exchange Privilege, shareholders
should contact their Morgan Stanley Dean Witter Financial Advisor or other
Selected Broker-Dealer representative or the Transfer Agent.
    
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  Shares of each Class of the Fund can be redeemed for cash at
any time at the net asset value per share next determined less the amount of any
applicable CDSC in the case of Class A, Class B or Class C shares (see "Purchase
of Fund Shares"). If shares are held in a shareholder's account without a share
certificate, a written request for redemption to the Fund's Transfer Agent at
P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are held by the
shareholder, the shares may be redeemed by surrendering the certificates with a
written request for redemption along with any additional documentation required
by the Transfer Agent.
    REPURCHASE.  DWR and other Selected Broker-Dealers are authorized to
repurchase shares represented by a share certificate which is delivered to any
of their offices. Shares held in a shareholder's account without a share
certificate may also be repurchased by DWR and other Selected Broker-Dealers
upon the telephonic or telegraphic request of the shareholder. The repurchase
price is the net asset value next computed (see "Purchase of Fund Shares") after
such repurchase order is received by DWR and other Selected Broker-Dealers,
reduced by any applicable CDSC.
 
    The CDSC, if any, will be the only fee imposed by the Fund or the
Distributor. The offer by DWR and
 
                                       29
<PAGE>
other Selected Broker-Dealers to repurchase shares may be suspended without
notice by them at any time. In that event, shareholders may redeem their shares
through the Fund's Transfer Agent as set forth above under "Redemption."
 
   
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED. Payment for shares presented for
repurchase or redemption will be made by check within seven days after receipt
by the Transfer Agent of the certificate and/or written request in good order.
Such payment may be postponed or the right of redemption suspended under unusual
circumstances, e.g., when normal trading is not taking place on the New York
Stock Exchange. If the shares to be redeemed have recently been purchased by
check, payment of the redemption proceeds may be delayed for the minimum time
needed to verify that the check used for investment has been honored (not more
than fifteen days from the time of receipt of the check by the Transfer Agent).
Shareholders maintaining margin accounts with DWR or another Selected Broker-
Dealer are referred to their Morgan Stanley Dean Witter Financial Advisor or
other Selected Broker-Dealer representative regarding restrictions on redemption
of shares of the Fund pledged in the margin account.
    
 
    REINSTATEMENT PRIVILEGE.  A shareholder who has had his or her shares
redeemed or repurchased and has not previously exercised this reinstatement
privilege may, within 35 days after the date of the redemption or repurchase,
reinstate any portion or all of the proceeds of such redemption or repurchase in
shares of the Fund in the same Class from which such shares were redeemed or
repurchased, at their net asset value next determined after a reinstatement
request, together with the proceeds, is received by the Transfer Agent and
receive a pro rata credit for any CDSC paid in connection with such redemption
or repurchase.
 
    INVOLUNTARY REDEMPTION.  The Fund reserves the right to redeem, on sixty
days' notice and at net asset value, the shares (other than shares held in an
Individual Retirement Account or Custodial Account under Section 403(b)(7) of
the Internal Revenue Code) of any shareholder whose shares, due to redemptions
by the shareholder, have a value of less than $100 or such lesser amount as may
be fixed by the Trustees or, in the case of an account opened through
EasyInvest-SM-, if after twelve months the shareholder has invested less than
$1,000 in the account. However, before the Fund redeems such shares and sends
the proceeds to the shareholder it will notify the shareholder that the value of
the shares is less than the applicable amount and allow the shareholder sixty
days to make an additional investment in an amount which will increase the value
of the account to at least the applicable amount before the redemption is
processed. No CDSC will be imposed on any involuntary redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
   
    DIVIDENDS AND DISTRIBUTIONS.  The Fund declares dividends separately for
each Class of shares and intends to declare dividends from net investment income
on each day the New York Stock Exchange is open for business (see "Purchase of
Fund Shares"). The amount of the dividend declared may fluctuate from day to
day. Dividends are declared daily and paid monthly in additional shares of the
Fund. The Fund intends to distribute dividends from net short-term and long-term
capital gains, if any, at least once each year. The Fund may, however, elect to
retain all or a portion of any net long-term capital gains in any year.
    
    All dividends and any capital gains distributions will be paid in additional
shares of the same Class and automatically credited to the shareholder's account
without issuance of a share certificate unless the shareholder requests in
writing that all dividends or all dividends and distributions be paid in cash.
Shares acquired by dividend and distribution reinvestments will not be subject
to any front-end sales charge or CDSC. Class B shares acquired through
 
                                       30
<PAGE>
dividend and distribution reinvestments will become eligible for conversion to
Class A shares on a pro rata basis. Distributions paid on Class A and Class D
shares will be higher than for Class B and Class C shares because distribution
fees paid by Class B and Class C shares are higher. (See "Shareholder
Services--Automatic Investment of Dividends and Distributions".)
 
   
    TAXES.  Because the Fund intends to distribute all of its net investment
income and capital gains to shareholders and otherwise continue to qualify as a
regulated investment company under Subchapter M of the Internal Revenue Code, it
is not expected that the Fund will be required to pay any federal income tax.
Shareholders who are required to pay taxes on their income will normally have to
pay federal income taxes, and any state and local income taxes, on the dividends
and distributions they receive from the Fund. Such dividends and distributions,
to the extent that they are derived from net investment income or net short-term
capital gains, are taxable to the shareholder as ordinary dividend income
regardless of whether the shareholder receives such payments in additional
shares or in cash. Any dividends declared in the last quarter of any calendar
year which are paid to shareholders of record in such period in the following
year prior to February 1 will be deemed, for tax purposes, to have been received
by the shareholder in the prior year.
    
 
   
    Long-term and short-term capital gains may be generated by the sale of
portfolio securities by the Fund. Distributions of net long-term capital gains,
if any, are taxable to shareholders as long-term capital gains regardless of how
long a shareholder has held the Fund's shares and regardless of whether the
distribution is received in additional shares or in cash. After the end of the
calendar year, shareholders will receive full information on their dividends and
capital gains distributions for tax purposes, including information as to the
portion taxable as ordinary income and the portion taxable as mid-term and
long-term capital gains. Shareholders will also be notified if their
proportionate share of long-term capital gains distributions that are eligible
for a reduced rate of tax under the Taxpayer Relief Act of 1997.
    
 
    The Fund may at times make payments from sources other than income or net
capital gains. Payments from such sources would, in effect, represent a return
of a portion of each shareholder's investment. All, or a portion, of such
payments would not be taxable to shareholders.
 
   
    To avoid being subject to a 31% federal backup withholding tax on taxable
dividends, capital gains distributions and the proceeds of redemptions and
repurchases, shareholders' taxpayer identification numbers must be furnished and
certified as to accuracy. The foregoing discussion relates solely to the federal
income tax consequences of an investment in the Fund. Distributions may also be
subject to state and local taxes; therefore, each shareholder is advised to
consult his or her own tax advisor.
    
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    From time to time the Fund may quote its "yield" and/or its "total return"
in advertisements and sales literature. These figures are computed separately
for Class A, Class B, Class C and Class D shares. Both the yield and the total
return of the Fund are based on historical earnings and are not intended to
indicate future performance. The yield of each Class of the Fund is computed by
dividing the Class's net investment income over a 30-day period by an average
value (using the average number of shares entitled to receive dividends and the
maximum offering price per share at the end of the period), all in accordance
with applicable regulatory requirements. Such amount is compounded for six
months and then annualized for a twelve-month period to derive the Fund's yield
for each Class.
 
    The "average annual total return" of the Fund refers to a figure reflecting
the average annualized
 
                                       31
<PAGE>
percentage increase (or decrease) in the value of an initial investment in a
Class of the Fund of $1,000 over periods of one, five and ten years, or over the
life of the Fund, if less than any of the foregoing. Average annual total return
reflects all income earned by the Fund, any appreciation or depreciation of the
Fund's assets, all expenses incurred by the applicable Class and all sales
charges incurred by shareholders, for the stated periods. It also assumes
reinvestment of all dividends and distributions paid by the Fund.
 
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average,
year-by-year or other types of total return figures. The Fund may also advertise
the growth of hypothetical investments of $10,000, $50,000 and $100,000 in each
Class of shares of the Fund. Such calculations may or may not reflect the
deduction of any sales charge which, if reflected, would reduce the performance
quoted. The Fund from time to time may also advertise its performance relative
to certain performance rankings and indexes compiled by independent
organizations, such as mutual fund performance rankings of Lipper Analytical
Services, Inc.
 
ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
    VOTING RIGHTS.  All shares of beneficial interest of the Fund are of $0.01
par value and are equal as to earnings, assets and voting privileges except that
each Class will have exclusive voting privileges with respect to matters
relating to distribution expenses borne solely by such Class or any other matter
in which the interests of one Class differ from the interests of any other
Class. In addition, Class B shareholders will have the right to vote on any
proposed material increase in Class A's expenses, if such proposal is submitted
separately to Class A shareholders. Also, as discussed herein, Class A, Class B
and Class C bear the expenses related to the distribution of their respective
shares.
 
    The Fund is not required to hold Annual Meetings of Shareholders and, in
ordinary circumstances, the Fund does not intend to hold such meetings. The
Trustees may call Special Meetings of Shareholders for action by shareholder
vote as may be required by the Act or the Declaration of Trust.
 
    Under Massachusetts law, shareholders of a business trust may, under certain
circumstances, be held personally liable as partners for obligations of the
Fund. However, the Declaration of Trust contains an express disclaimer of
shareholder liability for acts or obligations of the Fund, requires that Fund
obligations include such disclaimer, and provides for indemnification out of the
Fund's property for any shareholder held personally liable for the obligations
of the Fund. Thus, the risk of a shareholder incurring financial loss on account
of shareholder liability is limited to circumstances in which the Fund itself
would be unable to meet its obligations. Given the above limitations on
shareholder personal liability and the nature of the Fund's assets and
operations, the possibility of the Fund being unable to meet its obligations is
remote and, in the opinion of Massachusetts counsel to the Fund, the risk to
Fund shareholders of personal liability is remote.
 
   
    CODE OF ETHICS.  Directors, officers and employees of MSDW Advisors, MSDW
Services and MSDW Distributors are subject to a strict Code of Ethics adopted by
those companies. The Code of Ethics is intended to ensure that the interests of
shareholders and other clients are placed ahead of any personal interest, that
no undue personal benefit is obtained from a person's employment activities and
that actual and potential conflicts of interest are avoided. To achieve these
goals and comply with regulatory requirements, the Code of Ethics requires,
among other things, that personal securities transactions by employees of the
companies be subject to an advance clearance process to monitor that no Morgan
Stanley Dean Witter Fund is engaged at the same time in a purchase or sale of
    
 
                                       32
<PAGE>
   
the same security. The Code of Ethics bans the purchase of securities in an
initial public offering, and also prohibits engaging in futures and options
transactions and profiting on short-term trading (that is, a purchase within
sixty days of a sale or a sale within sixty days of a purchase) of a security.
In addition, investment personnel may not purchase or sell a security for their
personal account within thirty days before or after any transaction in any
Morgan Stanley Dean Witter Fund managed by them. Any violations of the Code of
Ethics are subject to sanctions, including reprimand, demotion or suspension or
termination of employment. The Code of Ethics comports with regulatory
requirements and the recommendations in the 1994 report by the Investment
Company Institute Advisory Group on Personal Investing.
    
 
    MASTER/FEEDER CONVERSION.  The Fund reserves the right to seek to achieve
its investment objective by investing all of its investable assets in a
diversified, open-end management investment company having the same investment
objective and policies and substantially the same investment restrictions as
those applicable to the Fund.
 
    SHAREHOLDER INQUIRIES.  All inquiries regarding the Fund should be directed
to the Fund at the telephone numbers or address set forth on the front cover of
this Prospectus.
 
                                       33
<PAGE>
   
Morgan Stanley Dean Witter
    
Intermediate
Income Securities
Two World Trade Center
New York, New York 10048
 
TRUSTEES
 
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Wayne E. Hedien
Dr. Manuel H. Johnson
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
 
OFFICERS
 
Charles A. Fiumefreddo
Chairman and Chief Executive Officer
Barry Fink
Vice President, Secretary and General Counsel
Rochelle G. Siegel
Vice President
Thomas F. Caloia
Treasurer
 
CUSTODIAN
 
The Bank of New York
90 Washington Street
New York, New York 10286
 
TRANSFER AGENT AND
DIVIDEND DISBURSING AGENT
 
   
Morgan Stanley Dean Witter Trust FSB
Harborside Financial Center
Plaza Two
Jersey City, New Jersey 07311
    
 
INDEPENDENT ACCOUNTANTS
 
   
PricewaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York 10036
    
 
INVESTMENT MANAGER
 
   
Morgan Stanley Dean Witter Advisors Inc.
    
 
   
MORGAN STANLEY
    
DEAN WITTER
INTERMEDIATE
INCOME SECURITIES
 
   
                              [GRAPHIC]
                                                  PROSPECTUS -- OCTOBER 30, 1998
    
<PAGE>
   
STATEMENT OF ADDITIONAL INFORMATION
DEAN WITTER
INTERMEDIATE INCOME
SECURITIES
OCTOBER 30, 1997
    
 
- --------------------------------------------------------------------------------
 
   
    Morgan Stanley Dean Witter Intermediate Income Securities (the "Fund") is an
open-end, diversified management investment company whose investment objective
is high current income consistent with the safety of principal. The Fund seeks
to achieve its investment objective by investing primarily in intermediate term,
investment grade fixed-income securities. See "Investment Objective and
Policies."
    
 
   
    A Prospectus for the Fund dated October 30, 1998, which provides the basic
information you should know before investing in the Fund, may be obtained
without charge from the Fund at the address or telephone numbers listed below,
from the Fund's Distributor, Morgan Stanley Dean Witter Distributors Inc., or
from Dean Witter Reynolds Inc. at any of its branch offices. This Statement of
Additional Information is not a Prospectus. It contains information in addition
to and more detailed than that set forth in the Prospectus. It is intended to
provide additional information regarding the activities and operations of the
Fund, and should be read in conjunction with the Prospectus.
    
 
   
Morgan Stanley Dean Witter
Intermediate Income Securities
Two World Trade Center
New York, New York 10048
(212) 392-2550 or
(800) 869-NEWS (Toll-Free)
    
<PAGE>
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
   
<TABLE>
  <S>                                       <C>
  The Fund and its Management.............     3
 
  Trustees and Officers...................     7
 
  Investment Practices and Policies.......    13
 
  Investment Restrictions.................    17
 
  Portfolio Transactions and Brokerage....    18
 
  The Distributor.........................    20
 
  Determination of Net Asset Value........    24
 
  Purchase of Fund Shares.................    25
 
  Shareholder Services....................    27
 
  Redemptions and Repurchases.............    32
 
  Dividends, Distributions and Taxes......    34
 
  Performance Information.................    35
 
  Description of Shares...................    37
 
  Custodian and Transfer Agent............    37
 
  Independent Accountants.................    38
 
  Reports to Shareholders.................    38
 
  Legal Counsel...........................    38
 
  Experts.................................    38
 
  Registration Statement..................    38
 
  Financial Statements--August 31, 1998...    39
 
  Report of Independent Accountants.......    53
 
  Appendix................................    54
</TABLE>
    
 
                                       2
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
THE FUND
 
   
    The Fund is a trust of the type commonly known as a "Massachusetts business
trust" and was organized under the laws of the Commonwealth of Massachusetts on
September 1, 1988 under the name Dean Witter Intermediate Income Securities. On
June 22, 1998, the Fund adopted an Amendment to the Declaration of Trust of the
Fund changing the name of the Fund to Morgan Stanley Dean Witter Intermediate
Income Securities.
    
 
THE INVESTMENT MANAGER
 
   
    Morgan Stanley Dean Witter Advisors Inc. (the "Investment Manager" or "MSDW
Advisors"), a Delaware Corporation, whose address is Two World Trade Center, New
York, New York 10048, is the Fund's Investment Manager. MSDW Advisors is a
wholly-owned subsidiary of Morgan Stanley Dean Witter & Co. ("MSDW"), a Delaware
corporation. The daily management of the Fund and research relating to the
Fund's portfolio are conducted by or under the direction of officers of the Fund
and of the Investment Manager, subject to review by the Fund's Board of
Trustees. Information as to these Trustees and Officers is contained under the
caption "Trustees and Officers."
    
 
   
    MSDW Advisors is the investment manager or investment advisor of the
following investment companies, which are collectively referred to as the
"Morgan Stanley Dean Witter Funds":
    
 
   
<TABLE>
<CAPTION>
OPEN-END FUNDS
 
<C>        <S>
        1  Active Assets California Tax-Free Trust
        2  Active Assets Government Securities Trust
        3  Active Assets Money Trust
        4  Active Assets Tax-Free Trust
        5  Morgan Stanley Dean Witter American Value Fund
        6  Morgan Stanley Dean Witter Balanced Growth Fund
        7  Morgan Stanley Dean Witter Balanced Income Fund
        8  Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
        9  Morgan Stanley Dean Witter California Tax-Free Income Fund
       10  Morgan Stanley Dean Witter Capital Appreciation Fund
       11  Morgan Stanley Dean Witter Capital Growth Securities
       12  Morgan Stanley Dean Witter Competitive Edge Fund, "BEST IDEAS" Portfolio
       13  Morgan Stanley Dean Witter Convertible Securities Trust
       14  Morgan Stanley Dean Witter Developing Growth Securities Trust
       15  Morgan Stanley Dean Witter Diversified Income Trust
       16  Morgan Stanley Dean Witter Dividend Growth Securities Inc.
       17  Morgan Stanley Dean Witter Equity Fund
       18  Morgan Stanley Dean Witter European Growth Fund Inc.
       19  Morgan Stanley Dean Witter Federal Securities Trust
       20  Morgan Stanley Dean Witter Financial Services Trust
       21  Morgan Stanley Dean Witter Fund of Funds
       22  Morgan Stanley Dean Witter Global Dividend Growth Securities
       23  Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
       24  Morgan Stanley Dean Witter Global Utilities Fund
       25  Morgan Stanley Dean Witter Growth Fund
       26  Morgan Stanley Dean Witter Hawaii Municipal Trust
       27  Morgan Stanley Dean Witter Health Sciences Trust
       28  Morgan Stanley Dean Witter High Yield Securities Inc.
       29  Morgan Stanley Dean Witter Income Builder Fund
       30  Morgan Stanley Dean Witter Information Fund
       31  Morgan Stanley Dean Witter Intermediate Income Securities
</TABLE>
    
 
                                       3
<PAGE>
   
<TABLE>
<C>        <S>
       32  Morgan Stanley Dean Witter International SmallCap Fund
       33  Morgan Stanley Dean Witter Japan Fund
       34  Morgan Stanley Dean Witter Limited Term Municipal Trust
       35  Morgan Stanley Dean Witter Liquid Asset Fund Inc.
       36  Morgan Stanley Dean Witter Market Leader Trust
       37  Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
       38  Morgan Stanley Dean Witter Mid-Cap Growth Fund
       39  Morgan Stanley Dean Witter Multi-State Municipal Series Trust
       40  Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
       41  Morgan Stanley Dean Witter New York Municipal Money Market Trust
       42  Morgan Stanley Dean Witter New York Tax-Free Income Fund
       43  Morgan Stanley Dean Witter Pacific Growth Fund Inc.
       44  Morgan Stanley Dean Witter Precious Metals and Minerals Trust
       45  Morgan Stanley Dean Witter Select Dimensions Investment Series
       46  Morgan Stanley Dean Witter Select Municipal Reinvestment Fund
       47  Morgan Stanley Dean Witter Short-Term Bond Fund
       48  Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
       49  Morgan Stanley Dean Witter Special Value Fund
       50  Morgan Stanley Dean Witter S&P 500 Index Fund
       51  Morgan Stanley Dean Witter S&P 500 Select Fund
       52  Morgan Stanley Dean Witter Strategist Fund
       53  Morgan Stanley Dean Witter Tax-Exempt Securities Trust
       54  Morgan Stanley Dean Witter Tax-Free Daily Income Trust
       55  Morgan Stanley Dean Witter U.S. Government Money Market Trust
       56  Morgan Stanley Dean Witter U.S. Government Securities Trust
       57  Morgan Stanley Dean Witter Utilities Fund
       58  Morgan Stanley Dean Witter Value-Added Market Series
       59  Morgan Stanley Dean Witter Value Fund
       60  Morgan Stanley Dean Witter Variable Investment Series
       61  Morgan Stanley Dean Witter World Wide Income Trust
<CAPTION>
 
CLOSED-END FUNDS
<C>        <S>
 
        1  InterCapital California Insured Municipal Income Trust
        2  InterCapital California Quality Municipal Securities
        3  Dean Witter Government Income Trust
        4  High Income Advantage Trust
        5  High Income Advantage Trust II
        6  High Income Advantage Trust III
        7  InterCapital Income Securities Inc.
        8  InterCapital Insured California Municipal Securities
        9  InterCapital Insured Municipal Bond Trust
       10  InterCapital Insured Municipal Income Trust
       11  InterCapital Insured Municipal Securities
       12  InterCapital Insured Municipal Trust
       13  Municipal Income Opportunities Trust
       14  Municipal Income Opportunities Trust II
       15  Municipal Income Opportunities Trust III
       16  Municipal Income Trust
       17  Municipal Income Trust II
       18  Municipal Income Trust III
       19  Municipal Premium Income Trust
       20  InterCapital New York Quality Municipal Securities
</TABLE>
    
 
                                       4
<PAGE>
   
<TABLE>
<C>        <S>
       21  Morgan Stanley Dean Witter Prime Income Trust
       22  InterCapital Quality Municipal Income Trust
       23  InterCapital Quality Municipal Investment Trust
       24  InterCapital Quality Municipal Securities
</TABLE>
    
 
   
    In addition, Morgan Stanley Dean Witter Services Company Inc. ("MSDW
Services"), a wholly-owned subsidiary of MSDW Advisors, serves as manager for
the following investment companies for which TCW Funds Management, Inc. is the
investment advisor (the "TCW/DW Funds"):
    
   
<TABLE>
<CAPTION>
OPEN-END FUNDS
 
<C>        <S>
        1  TCW/DW Emerging Markets Opportunities Trust
        2  TCW/DW Global Telecom Trust
        3  TCW/DW Income and Growth Fund
        4  TCW/DW Latin American Growth Fund
        5  TCW/DW Mid-Cap Equity Trust
        6  TCW/DW North American Government Income Trust
        7  TCW/DW Small Cap Growth Fund
        8  TCW/DW Total Return Trust
 
<CAPTION>
 
CLOSED-END FUNDS
<C>        <S>
 
        1  TCW/DW Term Trust 2000
        2  TCW/DW Term Trust 2002
        3  TCW/DW Term Trust 2003
</TABLE>
    
 
   
    MSDW Advisors also serves as: (i) administrator of The BlackRock Strategic
Term Trust Inc., a closed-end investment company; (ii) sub-administrator of
Templeton Global Governments Income Trust, a closed-end investment company; and
(iii) investment advisor of Offshore Dividend Growth Fund and Offshore Money
Market Fund, mutual funds established under the laws of the Cayman Islands and
available only to investors who are participants in the International Active
Assets Account program and are neither citizens nor residents of the United
States.
    
 
   
    Pursuant to an Investment Management Agreement (the "Agreement") with the
Investment Manager, the Fund has retained the Investment Manager to manage the
Investment of the Fund's assets, including the placing of orders for the
purchase and sale of portfolio securities. The Investment Manager obtains and
evaluates such information and advice relating to the economy, securities
markets, and specific securities as it considers necessary or useful to
continuously manage the assets of the Fund in a manner consistent with its
investment objective. Under the terms of the Agreement, in addition to managing
the Fund's investments, the Investment Manager maintains certain of the Fund's
books and records and furnishes, at its own expense, such office space,
facilities, equipment, clerical help and bookkeeping and legal services as the
Fund may reasonably require in the conduct of its business, including the
preparation of prospectuses, statements of additional information, proxy
statements and reports required to be filed with federal and state securities
commissions (except insofar as the participation or assistance of independent
accountants and attorneys is, in the opinion of the Investment Manager,
necessary or desirable). In addition, the Investment Manager pays the salaries
of all personnel, including officers of the Fund, who are employees of the
Investment Manager. The Investment Manager also bears the cost of telephone
service, heat, light, power and other utilities provided to the Fund. The
Investment Manager has retained MSDW Services to provide its administrative
services under the Agreement.
    
 
   
    Expenses not expressly assumed by the Investment Manager under the Agreement
or by the Distributor of the Fund's shares, Morgan Stanley Dean Witter
Distributors Inc. ("MSDW Distributors" or "The Distributor") will be paid by the
Fund. These expenses will be allocated among the four classes of shares of the
Fund (each, a "Class") pro rata based on the net assets of the Fund attributable
to each Class, except as described below. Such expenses include, but are not
limited to: expenses of the Plan of
    
 
                                       5
<PAGE>
Distribution pursuant to Rule 12b-1 (the "12b-1 fee") (see "The Distributor"),
charges and expenses of any registrar, custodian, stock transfer and dividend
disbursing agent; brokerage commissions; taxes; engraving and printing of share
certificates; registration costs of the Fund and its shares under federal and
state securities laws; the cost and expense of printing, including typesetting,
and distributing Prospectuses and Statements of Additional Information of the
Fund and supplements thereto to the Fund's shareholders; all expenses of
shareholders' and trustees' meetings and of preparing, printing and mailing of
proxy statements and reports to shareholders; fees and travel expenses of
trustees or members of any advisory board or committee who are not employees of
the Investment Manager or any corporate affiliate of the Investment Manager; all
expenses incident to any dividend, withdrawal or redemption options; charges and
expenses of any outside service used for pricing of the Fund's shares; fees and
expenses of legal counsel, including counsel to the trustees who are not
interested persons of the Fund or of the Investment Manager (not including
compensation or expenses of attorneys who are employees of the Investment
Manager) and independent accountants; membership dues of industry associations;
interest on Fund borrowings; postage; insurance premiums on property or
personnel (including officers and trustees) of the Fund which inure to its
benefit; extraordinary expenses (including, but not limited to, legal claims and
liabilities and litigation costs and any indemnification relating thereto); and
all other costs of the Fund's operation. The 12b-1 fees relating to a particular
Class will be allocated directly to that Class. In addition, other expenses
associated with a particular Class (except advisory or custodial fees) may be
allocated directly to that Class, provided that such expenses are reasonably
identified as specifically attributable to that Class and the direct allocation
to that Class is approved by the Trustees.
 
   
    As full compensation for the services and facilities furnished to the Fund
and expenses of the Fund assumed by the Investment Manager, the Fund pays the
Investment Manager monthly compensation calculated daily by applying the
following annual rates to the net assets of the Fund, determined as of the close
of business on every business day: 0.60% of the portion of the daily net assets
not exceeding $500 million; 0.50% of the portion of daily net assets exceeding
$500 million but not exceeding $750 million; 0.40% of the portion of the daily
net assets exceeding $750 million but not exceeding $1 billion; and 0.30% of the
portion of the daily net assets exceeding $1 billion. The management fee is
allocated among the Classes pro rata based on the net assets of the Fund
attributable to each Class. Total compensation accrued to the Investment Manager
under the Agreement for the fiscal years ended August 31, 1996, 1997 and 1998
was $1,337,360, $1,116,809, and $964,411, respectively.
    
 
    The Agreement provides that in the absence of willful misfeasance, bad
faith, gross negligence or reckless disregard of its obligations thereunder, the
Investment Manager is not liable to the Fund or any of its investors for any act
or omission by the Investment Manager or for any losses sustained by the Fund or
its investors. The Agreement in no way restricts the Investment Manager from
acting as investment manager or adviser to others.
 
    The Agreement was initially approved by the Trustees on February 21, 1997
and by the shareholders of the Fund at a Special Meeting of Shareholders held on
May 21, 1997. The Agreement is substantially identical to a prior investment
management agreement which was initially approved by the Board of Trustees on
October 30, 1992 and by the shareholders of the Fund at a Special Meeting of
Shareholders held on January 12, 1993. The Agreement took effect on May 31, 1997
upon the consummation of the merger of Dean Witter, Discover & Co. with Morgan
Stanley Group Inc. The Agreement may be terminated at any time, without penalty,
on thirty days' notice by the Board of Trustees of the Fund, by the holders of a
majority, as defined in the Investment Company Act of 1940 (the "Act"), of the
outstanding shares of the Fund, or by the Investment Manager. The Agreement will
automatically terminate in the event of its assignment (as defined in the Act).
 
    Under its terms, the Agreement has an initial term ending April 30, 1999,
and provides that it will continue in effect from year to year thereafter,
provided continuance of the Agreement is approved at least annually by the vote
of the holders of a majority, as defined in the Act, of the outstanding shares
of the Fund, or by the Trustees of the Fund; provided that in either event such
continuance is approved annually by the vote of a majority of the Trustees of
the Fund who are not parties to the Agreement or
 
                                       6
<PAGE>
"interested persons" (as defined in the Act) of any such party (the "Independent
Trustees"), which vote must be cast in person at a meeting called for the
purpose of voting on such approval.
 
   
    The following owned more than 5% of the outstanding shares of Class A of the
Fund on October 12, 1998: MSDWT FSB Trustee, West Coast Beauty Supply Co,
Retirement Savings Plan, P.O. Box 957, Jersey City, NJ 07303-0957--33.5%; Elaine
Marie Moscone REV TR AGRMNT, DTD 3/29/90, Elaine Marie Moscone TT, 382 Cranbrook
Ct., Bloomfield Hills, MI 48304-3525--21.3%; The David Arno Hughey Revocable TR,
DTD 11/25/96, David Arno Hughey and Susan E. Hughey TTEES, P.O. Box 501,
Merideth NH 03253-0501--6.7%; MSDW Trust Trustee, Morristown Hamblen 401k Plan,
P.O. Box 957, Jersey City, NJ 07303-0957--6.6%; Rita J. Kennedy, 840 Fenimore
Rd, Larchmont, NY 10538-1115-- 6.5%; MSDW Trust as Trustee, VVP America Salary
Deferral Plan, P.O. Box 957, Jersey City, NJ 07303-0957--6.4%. The following
owned more than 5% of the outstanding shares of Class C of the Fund on October
12, 1998: Barbara L. Strom, Gordon W. Strom & Kristine S. Erickson TTES of the
Barbara L. Strom REV TST DTD 11/04/96, 95 Woodland Circle, Edina, MN
55424-1454--39.9%; Robert E. Walker and Sarah M. Walker TEN/COM, 3713 NW
Ridgeway Circle, Bremerton, WA 98312-1711--13.7%; Dean Witter Reynolds CUST for
Thomas H. Carpenter, IRA Rollover Dated 09/16/97, 12 Sunset Drive, Fredonia, NY
14063-1629--6.5%. The following owned more than 5% of the outstanding shares of
Class D of the Fund on October 12, 1998: Melon Bank N.A., Mutual Funds
Operations, P.O. Box 3198, Pittsburgh, PA 15230-3198, as trustee of the Morgan
Stanley Dean Witter START Plan and the SPS Transaction Services, Inc. START
Plan, employee benefit plans established by certain subsidiaries of MSDW for
their employees as qualified under Sections 401(a) and 401(k) of the Internal
Revenue Code--64.9%; Morgan Stanley Dean Witter Trust Trustee Private Business
Profit Sharing Plan, P.O. Box 957, Jersey City, NJ 07303-0957--8.2%; IAM & AW
Local Lodge PM#2848, Multi-Emp Wage Reduc 401K PSP 03/06/86, TTEE J.
Winterhalter, P.O. Box 3039, Birmingham, MI 48012-3039--4.9%.
    
 
   
    The Fund has acknowledged that the name "Morgan Stanley Dean Witter" is a
property right of MSDW. The Fund has agreed that MSDW, or any corporate
affiliate of MSDW, may use, or at any time permit others to use, the name
"Morgan Stanley Dean Witter." The Fund has also agreed that in the event the
investment management contract between MSDW Advisors and the Fund is terminated,
or if the affiliation between the Investment Manager and its parent company is
terminated, the Fund will eliminate the name "Morgan Stanley Dean Witter" from
its name if MSDW shall so request.
    
 
TRUSTEES AND OFFICERS
- --------------------------------------------------------------------------------
 
   
    The Trustees and Executive Officers of the Fund, their principal business
occupations during the last five years and their affiliations, if any, with MSDW
Advisors and with the 85 Morgan Stanley Dean Witter Funds and the 11 TCW/DW
Funds are shown below.
    
 
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Michael Bozic (57) ...................................  Chairman and Chief Executive Officer of Levitz Furniture
Trustee                                                 Corporation (since November, 1995); Director or Trustee of
c/o Levitz Furniture Corporation                        the Morgan Stanley Dean Witter Funds; formerly President
7887 N. Federal Highway                                 and Chief Executive Officer of Hills Department Stores
Boca Raton, Florida                                     (May, 1991-July 1995); formerly variously Chairman, Chief
                                                        Executive Officer, President and Chief Operating Officer
                                                        (1987-1991) of the Sears Merchandise Group of Sears,
                                                        Roebuck and Co.; Director of Eaglemark Financial Services,
                                                        Inc. and Weirton Steel Corporation.
</TABLE>
    
 
                                       7
<PAGE>
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Charles A. Fiumefreddo* (65) .........................  Chairman, Director or Trustee, President and Chief
Chairman of the Board,                                  Executive Officer of the Morgan Stanley Dean Witter Funds;
 President and Chief Executive                          Chairman, Chief Executive Officer and Trustee of the
 Officer and Trustee                                    TCW/DW Funds; formerly Chairman, Chief Executive Officer
Two World Trade Center                                  and Director of MSDW Advisors, MSDW Distributors and MSDW
New York, New York                                      Services, Executive Vice President and Director of Dean
                                                        Witter Reynolds Inc. ("DWR"), Chairman and Director of
                                                        Morgan Stanley Dean Witter Trust FSB ("MSDW Trust"), and
                                                        Director and/or officer of various MSDW subsidiaries
                                                        (until June, 1998).
Edwin J. Garn (66) ...................................  Director or Trustee of the Morgan Stanley Dean Witter
Trustee                                                 Funds; formerly United States Senator (R-Utah) (1974-1992)
c/o Huntsman Corporation                                and Chairman, Senate Banking Committee (1980-1986);
500 Huntsman Way                                        formerly Mayor of Salt Lake City, Utah (1971-1974);
Salt Lake City, Utah                                    formerly Astronaut, Space Shuttle Discovery (April 12-19,
                                                        1985); Vice Chairman, Huntsman Corporation (since January,
                                                        1993); Director of Franklin Covey (time management
                                                        systems), John Alden Financial Corp. (health insurance),
                                                        United Space Alliance (joint venture between Lockheed
                                                        Martin and the Boeing Company) and Nuskin Asia Pacific
                                                        (multilevel marketing); member of the board of various
                                                        civic and charitable organizations.
John R. Haire (73) ...................................  Chairman of the Audit Committee and Director or Trustee of
Trustee                                                 the Morgan Stanley Dean Witter Funds; Chairman of the
Two World Trade Center                                  Audit Committee and Trustee of the TCW/DW Funds; formerly
New York, New York                                      Chairman of the Independent Directors or Trustees of the
                                                        Morgan Stanley Dean Witter Funds and the TCW/DW Funds
                                                        (until June, 1998); formerly President, Council for Aid to
                                                        Education (1978-1989) and Chairman and Chief Executive
                                                        Officer of Anchor Corporation, an Investment Adviser
                                                        (1964-1978).
Wayne E. Hedien (64) .................................  Retired; Director or Trustee of the Morgan Stanley Dean
Trustee                                                 Witter Funds; Director of The PMI Group, Inc. (private
c/o Gordon Altman Butowsky                              mortgage insurance); Trustee and Vice Chairman of The
 Weitzen Shalov & Wein                                  Field Museum of Natural History; formerly associated with
Counsel to the Independent Trustees                     the Allstate Companies (1966-1994), most recently as
114 West 47th Street                                    Chairman of The Allstate Corporation (March,
New York, New York                                      1993-December, 1994) and Chairman and Chief Executive
                                                        Officer of its wholly-owned subsidiary, Allstate Insurance
                                                        Company (July, 1989-December, 1994); director of various
                                                        other business and charitable organizations.
</TABLE>
    
 
                                       8
<PAGE>
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Dr. Manuel H. Johnson (49) ...........................  Senior Partner, Johnson Smick International, Inc., a
Trustee                                                 consulting firm; Co-Chairman and a founder of the Group of
c/o Johnson Smick International, Inc.                   Seven Council (G7C), an international economic commission;
1133 Connecticut Avenue, N.W.                           Director or Trustee of the Morgan Stanley Dean Witter
Washington, DC                                          Funds; Trustee of the TCW/DW Funds; Director of NASDAQ
                                                        (since June, 1995); Director of Greenwich Capital Markets,
                                                        Inc. (broker-dealer) and NVR, Inc. (home construction);
                                                        Chairman and Trustee of the Financial Accounting
                                                        Foundation (oversight organization for the Financial
                                                        Accounting Standards Board); formerly Vice Chairman of the
                                                        Board of Governors of the Federal Reserve System
                                                        (1986-1990) and Assistant Secretary of the U.S. Treasury.
Michael E. Nugent (62) ...............................  General Partner, Triumph Capital, L.P., a private
Trustee                                                 investment partnership; Director or Trustee of the Morgan
c/o Triumph Capital, L.P.                               Stanley Dean Witter Funds; Trustee of the TCW/DW Funds;
237 Park Avenue                                         formerly Vice President, Bankers Trust Company and BT
New York, New York                                      Capital Corporation (1984-1988); director of various
                                                        business organizations.
Philip J. Purcell* (55) ..............................  Chairman of the Board of Directors and Chief Executive
Trustee                                                 Officer of MSDW, DWR and Novus Credit Services Inc.;
1585 Broadway                                           Director of MSDW Distributors; Director or Trustee of the
New York, New York                                      Morgan Stanley Dean Witter Funds; Director and/or officer
                                                        of various MSDW subsidiaries.
John L. Schroeder (68) ...............................  Retired; Director or Trustee of the Morgan Stanley Dean
Trustee                                                 Witter Funds; Trustee of the TCW/DW Funds; Director of
c/o Gordon Altman Butowsky                              Citizens Utilities Company; formerly Executive Vice
  Weitzen Shalov & Wein                                 President and Chief Investment Officer of the Home
Counsel to the Independent Trustees                     Insurance Company (August, 1991-September, 1995).
114 West 47th Street
New York, New York
Barry Fink (43) ......................................  Senior Vice President (since March, 1997) and Secretary
Vice President, Secretary                               and General Counsel (since February, 1997) and Director
 and General Counsel                                    (since July, 1998) of MSDW Advisors and MSDW Services;
Two World Trade Center                                  Senior Vice President (since March, 1997) and Assistant
New York, New York                                      Secretary and Assistant General Counsel (since February,
                                                        1997) of MSDW Distributors; Assistant Secretary of DWR
                                                        (since August, 1996); Vice President, Secretary and
                                                        General Counsel of the Morgan Stanley Dean Witter Funds
                                                        and the TCW/DW Funds (since February, 1997); previously
                                                        First Vice President (June, 1993-February, 1997), Vice
                                                        President (until June, 1993) and Assistant Secretary and
                                                        Assistant General Counsel of MSDW Advisors and MSDW
                                                        Services and Assistant Secretary of the Morgan Stanley
                                                        Dean Witter Funds and the TCW/DW Funds.
</TABLE>
    
 
                                       9
<PAGE>
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Rochelle G. Siegel (50) ..............................  Senior Vice President of MSDW Advisors; Vice President of
Vice President                                          various Morgan Stanley Dean Witter Funds.
Two World Trade Center
New York, New York
Thomas F. Caloia (52) ................................  First Vice President and Assistant Treasurer of MSDW
Treasurer                                               Advisors and MSDW Services; Treasurer of the Morgan
Two World Trade Center                                  Stanley Dean Witter Funds and the TCW/DW Funds.
New York, New York
</TABLE>
    
 
- ------------
 *  Denotes Trustees who are "interested persons" of the Fund, as defined in the
Act.
 
   
    In addition, Mitchell M. Merin, President, Chief Executive Officer and
Director of MSDW Advisors and MSDW Services, Chairman and Director of MSDW
Distributors and MSDW Trust, Executive Vice President and Director of DWR, and
Director of various MSDW subsidiaries, Robert M. Scanlan, President, Chief
Operating Officer and Director of MSDW Advisors and MSDW Services, Executive
Vice President of MSDW Distributors and MSDW Trust and Director of MSDW Trust,
Ronald E. Robison, Executive Vice President and Chief Administrative Officer of
MSDW Advisors of MSDW Services, Robert S. Giambrone, Senior Vice President of
MSDW Advisors, MSDW Services, MSDW Distributors and MSDW Trust and Director of
MSDW Trust, and Joseph McAlinden, Executive Vice President and Chief Investment
Officer of MSDW Advisors and Director of MSDW Trust and Kevin Hurley, James F.
Willison, Peter M. Avelar, and Jonathan R. Page, Senior Vice Presidents of MSDW
Advisors are Vice Presidents of the Fund. Marilyn K. Cranney and Carsten Otto,
First Vice Presidents and Assistant General Counsels of MSDW Advisors and MSDW
Services, Frank Bruttomesso, LouAnne D. McInnis and Ruth Rossi, Vice Presidents
and Assistant General Counsels of MSDW Advisors and MSDW Services, and Todd Lebo
a Staff Attorney with MSDW Advisors, are Assistant Secretaries of the Fund.
    
 
   
THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES
    
 
   
    The Board of Trustees consists of nine (9) trustees. These same individuals
also serve as directors or trustees for all of the Morgan Stanley Dean Witter
Funds, and are referred to in this section as Trustees. As of the date of this
Statement of Additional Information, there are a total of 85 Morgan Stanley Dean
Witter Funds, comprised of 121 portfolios. As of September 30, 1998, the Morgan
Stanley Dean Witter Funds had total net assets of approximately $105.3 billion
and more than six million shareholders.
    
 
   
    Seven Trustees (77% of the total number) have no affiliation or business
connection with MSDW Advisors or any of its affiliated persons and do not own
any stock or other securities issued by MSDW Advisors' parent company, MSDW.
These are the "disinterested" or "independent" Trustees. Four of the seven
independent Trustees are also Independent Trustees of the TCW/DW Funds.
    
 
   
    Law and regulation establish both general guidelines and specific duties for
the Independent Trustees. The Morgan Stanley Dean Witter Funds seek as
Independent Trustees individuals of distinction and experience in business and
finance, government service or academia; these are people whose advice and
counsel are in demand by others and for whom there is often competition. To
accept a position on the Funds' Boards, such individuals may reject other
attractive assignments because the Funds make substantial demands on their time.
Indeed, by serving on the Funds' Boards, certain Trustees who would otherwise be
qualified and in demand to serve on bank boards would be prohibited by law from
doing so.
    
 
   
    All of the Independent Trustees serve as members of the Audit Committee.
Three of them also serve as members of the Derivatives Committee. In addition,
three of the Trustees, including two Independent Trustees, serve as members of
the Insurance Committee. During the calendar year ended December 31, 1997, the
Audit Committee, the Derivatives Committee and the Independent Trustees held a
combined total of seventeen meetings.
    
 
                                       10
<PAGE>
   
    The Independent Trustees are charged with recommending to the full Board
approval of management, advisory and administration contracts, Rule 12b-1 plans
and distribution and underwriting agreements; continually reviewing Fund
performance; checking on the pricing of portfolio securities, brokerage
commissions, transfer agent costs and performance, and trading among Funds in
the same complex; and approving fidelity bond and related insurance coverage and
allocations, as well as other matters that arise from time to time. The
Independent Trustees are required to select and nominate individuals to fill any
Independent Trustee vacancy on the Board of any Fund that has a Rule 12b-1 plan
of distribution. Most of the Morgan Stanley Dean Witter Funds have such a plan.
    
 
   
    The Audit Committee is charged with recommending to the full Board the
engagement or discharge of the Fund's independent accountants; directing
investigations into matters within the scope of the independent accountants'
duties, including the power to retain outside specialists; reviewing with the
independent accountants the audit plan and results of the auditing engagement;
approving professional services provided by the independent accountants and
other accounting firms prior to the performance of such services; reviewing the
independence of the independent accountants; considering the range of audit and
non-audit fees; and reviewing the adequacy of the Fund's system of internal
controls.
    
 
   
    The Board of each Fund has formed a Derivatives Committee to approve
parameters for and monitor the activities of the Fund with respect to derivative
investments, if any, made by the Fund.
    
 
   
    Finally, the Board of each Fund has formed an Insurance Committee to review
and monitor the insurance coverage maintained by the Fund.
    
 
   
ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL MORGAN
STANLEY DEAN WITTER FUNDS
    
 
   
    The Independent Trustees and the Funds' management believe that having the
same Independent Trustees for each of the Morgan Stanley Dean Witter Funds
avoids the duplication of effort that would arise from having different groups
of individuals serving as Independent Trustees for each of the Funds or even of
sub-groups of Funds. They believe that having the same individuals serve as
Independent Trustees of all the Funds tends to increase their knowledge and
expertise regarding matters which affect the Fund complex generally and enhances
their ability to negotiate on behalf of each Fund with the Fund's service
providers. This arrangement also precludes the possibility of separate groups of
Independent Trustees arriving at conflicting decisions regarding operations and
management of the Funds and avoids the cost and confusion that would likely
ensue. Finally, having the same Independent Trustees serve on all Fund Boards
enhances the ability of each Fund to obtain, at modest cost to each separate
Fund, the services of Independent Trustees of the caliber, experience and
business acumen of the individuals who serve as Independent Trustees of the
Morgan Stanley Dean Witter Funds.
    
 
   
COMPENSATION OF INDEPENDENT TRUSTEES
    
 
   
    The Fund pays each Independent Trustee an annual fee of $800 plus a per
meeting fee of $50 for meetings of the Board of Trustees, the Independent
Trustees or Committees of the Board of Trustees attended by the Trustee (the
Fund pays the Chairman of the Audit Committee an additional annual fee of $750).
If a Board meeting and a meeting of the Independent Trustees or a Committee
meeting, or a meeting of the Independent Trustees and/or more than one Committee
meeting, take place on a single day, the Trustees are paid a single meeting fee
by the Fund. The Fund also reimburses such Trustees for travel and other
out-of-pocket expenses incurred by them in connection with attending such
meetings. Trustees and officers of the Fund who are or have been employed by the
Investment Manager or an affiliated company receive no compensation or expense
reimbursement from the Fund for their services as Trustee. Mr. Haire currently
serves as Chairman of the Audit Committee. Prior to June 1, 1998, Mr. Haire also
served as Chairman of the Independent Trustees, for which services the Fund paid
him an additional annual fee of $1,200.
    
 
                                       11
<PAGE>
   
    The following table illustrates the compensation paid to the Fund's
Independent Trustees by the Fund for the fiscal year ended August 31, 1998.
    
 
   
                               FUND COMPENSATION
    
 
   
<TABLE>
<CAPTION>
                                                                   AGGREGATE
                                                                 COMPENSATION
NAME OF INDEPENDENT TRUSTEE                                      FROM THE FUND
- --------------------------------------------------------------  ---------------
<S>                                                             <C>
Michael Bozic.................................................      $1,650
Edwin J. Garn.................................................       1,750
John R. Haire.................................................       3,250
Wayne E. Hedien...............................................       1,732
Dr. Manuel H. Johnson.........................................       1,650
Michael E. Nugent.............................................       1,700
John L. Schroeder.............................................       1,700
</TABLE>
    
 
   
    The following table illustrates the compensation paid to the Fund's
Independent Trustees for the calendar year ended December 31, 1997 for services
to the 84 Morgan Stanley Dean Witter Funds and, in the case of Messrs. Haire,
Johnson, Nugent and Schroeder, the 14 TCW/DW Funds that were in operation at
December 31, 1997. Mr. Haire serves as Chairman of the Audit Committee of each
Morgan Stanley Dean Witter Fund and each TCW/DW Fund and, prior to June 1, 1998,
also served as Chairman of the Independent Directors or Trustees of those Funds.
With respect to Messrs. Haire, Johnson, Nugent and Schroeder, the TCW/DW Funds
are included solely because of a limited exchange privilege between those Funds
and five Morgan Stanley Dean Witter Money Market Funds. Mr. Hedien's term as
Director or Trustee of each Morgan Stanley Dean Witter Fund commenced on
September 1, 1997.
    
 
   
    CASH COMPENSATION FROM MORGAN STANLEY DEAN WITTER FUNDS AND TCW/DW FUNDS
    
 
   
<TABLE>
<CAPTION>
                                                                   FOR SERVICE AS                    TOTAL CASH
                                                                    CHAIRMAN OF      FOR SERVICE    COMPENSATION
                               FOR SERVICE                          INDEPENDENT          AS              FOR
                              AS DIRECTOR OR                       DIRECTORS/TRUSTEES  CHAIRMAN OF   SERVICES TO
                               TRUSTEE AND                           AND AUDIT       INDEPENDENT         84
                                COMMITTEE        FOR SERVICE AS    COMMITTEES OF      TRUSTEES         MORGAN
                               MEMBER OF 84       TRUSTEE AND            84           AND AUDIT        STANLEY
                              MORGAN STANLEY       COMMITTEE       MORGAN STANLEY   COMMITTEES OF    DEAN WITTER
NAME OF                        DEAN WITTER        MEMBER OF 14      DEAN WITTER          14         FUNDS AND 14
INDEPENDENT TRUSTEE               FUNDS           TCW/DW FUNDS         FUNDS        TCW/DW FUNDS    TCW/DW FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
<S>                          <C>                <C>                <C>              <C>             <C>
Michael Bozic..............      $133,602           --                 --               --            $133,602
Edwin J. Garn..............       149,702           --                 --               --             149,702
John R. Haire..............       149,702           $73,725           $157,463        $ 25,350         406,240
Wayne E. Hedien............        39,010           --                 --               --              39,010
Dr. Manuel H. Johnson......       145,702            71,125            --               --             216,827
Michael E. Nugent..........       149,702            73,725            --               --             223,427
John L. Schroeder..........       149,702            73,725            --               --             223,427
</TABLE>
    
 
   
    As of the date of this Statement of Additional Information, 57 of the Morgan
Stanley Dean Witter Funds, including the Fund, have adopted a retirement program
under which an Independent Trustee who retires after serving for at least five
years (or such lesser period as may be determined by the Board) as an
Independent Director or Trustee of any Morgan Stanley Dean Witter Fund that has
adopted the retirement program (each such Fund referred to as an "Adopting Fund"
and each such Trustee referred to as an "Eligible Trustee") is entitled to
retirement payments upon reaching the eligible retirement age (normally, after
attaining age 72). Annual payments are based upon length of service. Currently,
upon retirement, each Eligible Trustee is entitled to receive from the Adopting
Fund, commencing as of his or her retirement date and continuing for the
remainder of his or her life, an annual retirement benefit (the "Regular
Benefit") equal to 29.41% of his or her Eligible Compensation plus 0.4901667% of
such Eligible Compensation for each full month of service as an Independent
Director or Trustee of any Adopting Fund in excess of five years up to a maximum
of 58.82% after ten years of service. The foregoing
    
 
                                       12
<PAGE>
   
percentages may be changed by the Board.(1) "Eligible Compensation" is one-fifth
of the total compensation earned by such Eligible Trustee for service to the
Adopting Fund in the five year period prior to the date of the Eligible
Trustee's retirement. Benefits under the retirement program are not secured or
funded by the Adopting Funds.
    
 
   
    The following table illustrates the retirement benefits accrued to the
Fund's Independent Trustees by the Fund for the fiscal year ended August 31,
1998 and by the 57 Morgan Stanley Dean Witter Funds (including the Fund) for the
year ended December 31, 1997, and the estimated retirement benefits for the
Fund's Independent Trustees, to commence upon their retirement, from the Fund as
of August 31, 1998, and from the 57 Morgan Stanley Dean Witter Funds as of
December 31, 1997.
    
 
   
   RETIREMENT BENEFITS FROM THE FUND AND ALL MORGAN STANLEY DEAN WITTER FUNDS
    
 
   
<TABLE>
<CAPTION>
                                     FOR ALL ADOPTING FUNDS
                                   ---------------------------                            ESTIMATED ANNUAL
                                    ESTIMATED                     RETIREMENT BENEFITS         BENEFITS
                                     CREDITED                     ACCRUED AS EXPENSES           UPON
                                      YEARS        ESTIMATED                               RETIREMENT(2)
                                    OF SERVICE     PERCENTAGE     -------------------     ----------------
                                        AT             OF                     BY ALL       FROM   FROM ALL
                                    RETIREMENT      ELIGIBLE      BY THE     ADOPTING      THE    ADOPTING
NAME OF INDEPENDENT TRUSTEE        (MAXIMUM 10)   COMPENSATION     FUND       FUNDS        FUND    FUNDS
- ---------------------------------  ------------   ------------    ------     --------     ------  --------
<S>                                <C>            <C>             <C>        <C>          <C>     <C>
Michael Bozic....................       10           58.82%       $  403     $ 20,499     $1,029  $ 55,026
Edwin J. Garn....................       10           58.82           604       30,878      1,029    55,026
John R. Haire....................       10           58.82          (133)(3)  (19,823)(3)  2,418   132,002
Wayne E. Hedien..................        9           50.00           524            0        875    46,772
Dr. Manuel H. Johnson............       10           58.82           246       12,832      1,029    55,026
Michael E. Nugent................       10           58.82           429       22,546      1,029    55,026
John L. Schroeder................        8           49.02           804       39,350        861    46,123
</TABLE>
    
 
- ---------------
   
(1) An Eligible Trustee may elect alternate payments of his or her retirement
    benefits based upon the combined life expectancy of such Eligible Trustee
    and his or her spouse on the date of such Eligible Trustee's retirement. The
    amount estimated to be payable under this method, through the remainder of
    the later of the lives of such Eligible Trustee and spouse, will be the
    actuarial equivalent of the Regular Benefit. In addition, the Eligible
    Trustee may elect that the surviving spouse's periodic payment of benefits
    will be equal to either 50% or 100% of the previous periodic amount, an
    election that, respectively, increases or decreases the previous periodic
    amount so that the resulting payments will be the actuarial equivalent of
    the Regular Benefit.
    
 
   
(2) Based on current levels of compensation. Amount of annual benefits also
    varies depending on the Trustee's elections described in Footnote (1) above.
    
 
   
(3) This number reflects the effect of the extension of Mr. Haire's term as
    Director or Trustee until May 1, 1999.
    
 
   
    As of the date of this Statement of Additional Information, the aggregate
number of shares of beneficial interest of the Fund owned by the Fund's officers
and Trustees as a group was less than 1 percent of the Fund's shares of
beneficial interest outstanding.
    
 
INVESTMENT PRACTICES AND POLICIES
- --------------------------------------------------------------------------------
 
SPECIAL INVESTMENT CONSIDERATIONS
 
    As stated in the Prospectus, the Fund may invest up to 5% of its net assets
in lower rated fixed-income securities, sometimes referred to as high yield
securities. Because of the special nature of high yield securities, the
Investment Manager must take account certain special considerations in assessing
the risks associated with such investments. Although the growth of the high
yield securities market in the 1980s had paralleled a long economic expansion,
recently many issuers have been affected by adverse economic and market
conditions. It should be recognized that an economic downturn or increase in
interest rates is likely to have a negative effect on the high yield bond market
and on the value of the high yield securities held by the Fund, as well as on
the ability of the securities' issuers to repay principal and interest on their
borrowings.
 
    The prices of high yield securities have been found to be less sensitive to
changes in prevailing interest rates than higher-rated investments, but are
likely to be more sensitive to adverse economic
 
                                       13
<PAGE>
changes or individual corporate developments. During an economic downturn or
substantial period of rising interest rates, highly leveraged issuers may
experience financial stress which would adversely affect their ability to
service their principal and interest payment obligations, to meet their
projected business goals or to obtain additional financing. If the issuer of a
fixed-income security owned by the Fund defaults, the Fund may incur additional
expenses to seek recovery. In addition, periods of economic uncertainty and
change can be expected to result in an increased volatility of market prices of
high yield securities and a concomitant volatility in the net asset value of a
share of the Fund. Moreover, the market prices of certain of the Fund's
portfolio securities which are structured as zero coupon and payment-in-kind
securities are affected to a greater extent by interest rate changes and thereby
tend to be more volatile than securities which pay interest periodically and in
cash (see "Dividends, Distributions and Taxes" for a discussion of the tax
ramifications of investments in such securities).
 
    The secondary market for high yield securities may be less liquid than the
markets for higher quality securities and, as such, may have an adverse effect
on the market prices of certain securities. The limited liquidity of the market
may also adversely affect the ability of the Fund's Trustees to arrive at a fair
value for certain high yield securities at certain times and could make it
difficult for the Fund to sell certain securities.
 
    Current laws and proposed new laws may have a potentially negative impact on
the market for high yield bonds. For example, legislation requires
federally-insured savings and loan associations to divest their investments in
high yield bonds. This legislation and other proposed legislation may have an
adverse effect upon the value of high yield securities and a concomitant
negative impact upon the net asset value of a share of the Fund.
 
    U.S. GOVERNMENT SECURITIES.  As stated in the Prospectus, while the Fund
under normal circumstances will invest primarily in corporate debt securities,
it may also invest in U.S. Government securities. Securities issued by the U.S.
Government, its agencies or instrumentalities in which the Fund may invest
include:
 
        (1) U.S. Treasury bills (maturities of one year or less), U.S. Treasury
    notes (maturities of one to ten years) and U.S. Treasury bonds (generally
    maturities of greater than ten years), all of which are direct obligations
    of the U.S. Government and, as such, are backed by the "full faith and
    credit" of the United States.
 
        (2) Securities issued by agencies and instrumentalities of the U.S.
    Government which are backed by the full faith and credit of the United
    States. Among the agencies and instrumentalities issuing such obligations
    are the Federal Housing Administration, the Government National Mortgage
    Association ("GNMA"), the Department of Housing and Urban Development, the
    Export-Import Bank, the Farmers Home Administration; the General Services
    Administration, the Maritime Administration and the Small Business
    Administration. The maturities of such obligations range from three months
    to thirty years although the Fund may not invest in securities with
    remaining maturities of more than twelve years.
 
        (3) Securities issued by agencies and instrumentalities which are not
    backed by the full faith and credit of the United States, but whose issuing
    agency or instrumentality has the right to borrow, to meet its obligations,
    from an existing line of credit with the U.S. Treasury. Among the agencies
    and instrumentalities issuing such obligations are the Tennessee Valley
    Authority, the Federal National Mortgage Association ("FNMA"), the Federal
    Home Loan Mortgage Corporation ("FHLMC") and the U.S. Postal Service.
 
        (4) Securities issued by agencies and instrumentalities which are not
    backed by the full faith and credit of the United States, but which are
    backed by the credit of the issuing agency or instrumentality. Among the
    agencies and instrumentalities issuing such obligations are the Federal Farm
    Credit System and the Federal Home Loan Banks.
 
    ZERO COUPON SECURITIES.  A portion of the U.S. Government securities
purchased by the Fund may be zero coupon securities. Such securities are
purchased at a discount from their face amount, giving
 
                                       14
<PAGE>
the purchaser the right to receive their full value at maturity. The interest
earned on such securities is, implicitly, automatically compounded and paid out
at maturity. While such compounding at a constant rate eliminates the risk of
receiving lower yields upon reinvestment of interest if prevailing interest
rates decline, the owner of a zero coupon security will be unable to participate
in higher yields upon reinvestment of interest received if prevailing interest
rates rise. For this reason, zero coupon securities are subject to substantially
greater price fluctuations during periods of changing prevailing interest rates
than are comparable securities which pay interest currently. Zero coupon
securities may not exceed 5% of the Fund's total assets.
 
    SECURITIES OF FOREIGN ISSUERS.  As stated in the Prospectus, the Fund may
invest in fixed-income securities issued by foreign governments and other
foreign issuers, provided such securities are denominated in U.S. Dollars. With
regard to foreign fixed-income securities, the Investment Manager believes that
in many instances such securities may provide higher yields than similar
securities of domestic issuers. With the expiration of the Interest Equalization
Tax in 1974, many of these investments currently enjoy increased liquidity,
although such securities are generally less liquid than the securities of United
States corporations, and are certainly less liquid than securities issued by the
United States Government or its agencies.
 
    Foreign investments involve certain risks, including the political or
economic instability of the issuer or of the country of issue, the difficulty of
predicting international trade patterns and the possibility of imposition of
exchange controls. Such securities may also be subject to greater fluctuations
in price than securities of United States corporations or of the United States
Government. In addition, there may be less publicly available information about
a foreign company than about a domestic company. Foreign companies generally are
not subject to uniform accounting, auditing and financial reporting standards
comparable to those applicable to domestic companies. There is generally less
government regulation of stock exchanges, brokers and listed companies abroad
than in the United States, and with respect to certain foreign countries, there
is a possibility of expropriation or confiscatory taxation, or diplomatic
developments which could affect investment in those countries. Finally, in the
event of a default of any such foreign debt obligations, it may be more
difficult for the Fund to obtain or to enforce a judgment against the issuers of
such securities.
 
LENDING OF PORTFOLIO SECURITIES
 
    As discussed in the Prospectus, consistent with applicable regulatory
requirements, the Fund may lend its portfolio securities to brokers, dealers and
other financial institutions, provided that such loans are callable at any time
by the Fund (subject to notice provisions described below), and are at all times
secured by cash or cash equivalents, which are maintained in a segregated
account pursuant to applicable regulations and that are equal to at least the
market value, including accrued interest, determined daily, of the loaned
securities. The advantage of such loans is that the Fund continues to receive
the income on the loaned securities while at the same time earning interest on
the cash amounts deposited as collateral, which will be invested in short-term
obligations. The Fund will not lend its portfolio securities if such loans are
not permitted by the laws or regulations of any state in which its shares are
qualified for sale and will not lend more than 25% of the value of its total
assets. A loan may be terminated by the borrower on one business day's notice,
or by the Fund on two business days' notice. If the borrower fails to deliver
the loaned securities within two days after receipt of notice, the Fund could
use the collateral to replace the securities while holding the borrower liable
for any excess of replacement cost over the value of the collateral. As with any
extensions of credit, there are risks of delay in recovery and in some cases
even loss of rights in the collateral should the borrower of the securities fail
financially. However, these loans of portfolio securities will only be made to
firms deemed by the Fund's management to be creditworthy and when the income
which can be earned from such loans justifies the attendant risks. Upon
termination of the loan, the borrower is required to return the securities to
the Fund. Any gain or loss in the market price during the loan period would
inure to the Fund. The creditworthiness of firms to which the Fund lends its
portfolio securities will be monitored on an ongoing basis by the Investment
Manager pursuant to procedures adopted and reviewed, on an ongoing basis, by the
Board of Trustees of the Fund.
 
                                       15
<PAGE>
    When voting or consent rights which accompany loaned securities pass to the
borrower, the Fund will follow the policy of calling the loaned securities, to
be delivered within one day after notice, to permit the exercise of such rights
if the matters involved would have a material effect on the Fund's investment in
such loaned securities. The Fund will pay reasonable finder's, administrative
and custodial fees in connection with a loan of its securities. However, the
Fund does not presently intend to lend any of its portfolio securities in the
foreseeable future.
 
REPURCHASE AGREEMENTS
 
    When cash may be available for only a few days, it may be invested by the
Fund in repurchase agreements until such time as it may otherwise be invested or
used for payments of obligations of the Fund. A repurchase agreement may be
viewed as a type of secured lending by the Fund which typically involves the
acquisition by the Fund of government securities from a selling financial
institution such as a bank, savings and loan association or broker-dealer. The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security ("collateral") at a
specified price and at a fixed time in the future, usually not more than seven
days from the date of purchase. In the event the original seller defaults on its
obligation to repurchase, as a result of its bankruptcy or otherwise, the Fund
will seek to sell the collateral, which action could involve costs or delays. In
such case, the Fund's ability to dispose of the collateral to recover its
investment may be restricted or delayed.
 
    The Fund will accrue interest from the institution until the time when the
repurchase is to occur. Although such date is deemed by the Fund to be the
maturity date of a repurchase agreement, the maturities of securities subject to
repurchase agreements are not subject to any limits and may exceed one year.
 
    While repurchase agreements involve certain risks not associated with direct
investments in debt securities, the Fund follows procedures designed to minimize
such risks. Repurchase agreements will be transacted only with large,
well-capitalized and well-established financial institutions whose financial
condition will be continuously monitored by the Investment Manager subject to
procedures established by the Trustees. The procedures also require that the
collateral underlying the agreement be specified. The Fund does not presently
intend to enter into repurchase agreements so that more than 5% of the Fund's
net assets are subject to such agreements.
 
WHEN-ISSUED AND DELAYED DELIVERY SECURITIES
 
   
    As discussed in the Prospectus, from time to time, in the ordinary course of
business, the Fund may purchase securities on a when-issued or delayed delivery
basis--i.e., delivery and payment can take place a month or more after the date
of the transactions. The securities so purchased are subject to market
fluctuation and no interest accrues to the purchaser during this period. While
the Fund will only purchase securities on a when-issued, delayed delivery or
forward commitment basis with the intention of acquiring the securities, the
Fund may sell the securities before the settlement date, if it is deemed
advisable. At the time the Fund makes the commitment to purchase securities on a
when-issued or delayed delivery basis, the Fund will record the transaction and
thereafter reflect the value, each day, of such security in determining the net
asset value of the Fund. At the time of delivery of the securities, the value
may be more or less than the purchase price. The Fund will also establish a
segregated account with the Fund's custodian bank in which it will continuously
maintain cash or U.S. Government securities or other liquid portfolio securities
equal in value to commitments for such when-issued or delayed delivery
securities; subject to this requirement, the Fund may purchase securities on
such basis without limit. An increase in the percentage of the Fund's assets
committed to the purchase of securities on a when-issued or delayed delivery
basis may increase the volatility of the Fund's net asset value.
    
 
WHEN, AS AND IF ISSUED SECURITIES
 
    As discussed in the Prospectus, the Fund may purchase securities on a "when,
as and if issued" basis under which the issuance of the security depends upon
the occurrence of a subsequent event, such as approval of a merger, corporate
reorganization, leveraged buyout or debt restructuring. The commitment for the
purchase of any such security will not be recognized in the portfolio of the
Fund until
 
                                       16
<PAGE>
   
the Investment Manager determines that issuance of the security is probable. At
such time, the Fund will record the transaction and, in determining its net
asset value, will reflect the value of the security daily. At such time, the
Fund will also establish a segregated account with its custodian bank in which
it will continuously maintain cash or U.S. Government securities or other liquid
portfolio securities equal in value to recognized commitments for such
securities. Settlement of the trade will occur within five business days of the
occurrence of the subsequent event. The value of the Fund's commitments to
purchase the securities of any one issuer, together with the value of all
securities of such issuer owned by the Fund, may not exceed 5% of the value of
the Fund's total assets at the time the initial commitment to purchase such
securities is made (see "Investment Restrictions"). Subject to the foregoing
restrictions, the Fund may purchase securities on such basis without limit. An
increase in the percentage of the Fund's assets committed to the purchase of
securities on a "when, as and if issued" basis may increase the volatility of
its net asset value. The Fund may also sell securities on a "when, as and if
issued" basis provided that the issuance of the security will result
automatically from the exchange or conversion of a security owned by the Fund at
the time of sale.
    
 
OPTIONS TRANSACTIONS
 
    The Fund has no current intention to engage in options transactions. In the
event the Fund wishes to engage in options transactions in the future, the
Fund's Prospectus and Statement of Additional Information will be amended and
sent to shareholders in advance of the change.
 
PORTFOLIO TURNOVER
 
   
    The Fund's portfolio turnover rate for the fiscal years ended August 31,
1997 and 1998 were approximately 98% and 98%, respectively. A 100% turnover rate
would occur, for example, if 100% of the securities held in the Fund's portfolio
(excluding all securities whose maturities at acquisition were one year or less)
were sold and replaced within one year.
    
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    In addition to the investment restrictions enumerated in the Prospectus, the
investment restrictions listed below have been adopted by the Fund as
fundamental policies, except as otherwise indicated. Under the Act, a
fundamental policy may not be changed without the vote of a majority of the
outstanding voting securities of the Fund, as defined in the Act. Such a
majority is defined as the lesser of (a) 67% or more of the shares present at a
meeting of shareholders, if the holders of 50% of the outstanding shares of the
Fund are present or represented by proxy or (b) more than 50% of the outstanding
shares of the Fund.
 
    The Fund may not:
 
         1. Invest in securities of any issuer if, to the knowledge of the Fund,
    any officer or trustee/ director of the Fund or of the Investment Manager
    owns more than 1/2 of 1% of the outstanding securities of such issuer, and
    such officers and trustees/directors who own more than 1/2 of 1% own in the
    aggregate more than 5% of the outstanding securities of such issuers.
 
         2. Purchase or sell real estate or interests therein, although the Fund
    may purchase securities of issuers which engage in real estate operations
    and securities secured by real estate or interests therein.
 
         3. Purchase oil, gas or other mineral leases, rights or royalty
    contracts or exploration or development programs, except that the Fund may
    invest in the securities of companies which operate, invest in, or sponsor
    such programs.
 
         4. Purchase securities of other investment companies, except in
    connection with a merger, consolidation, reorganization or acquisition of
    assets.
 
                                       17
<PAGE>
         5. Pledge its assets or assign or otherwise encumber them except to
    secure borrowings effected within the limitations set forth in restriction
    (6) in the Prospectus.
 
         6. Issue senior securities as defined in the Act except insofar as the
    Fund may be deemed to have issued a senior security by reason of borrowing
    money in accordance with restriction (6) in the Prospectus.
 
         7. Make loans of money or securities, except: (a) by the purchase of
    publicly distributed debt obligations in which the Fund may invest
    consistent with its investment objective and policies; (b) by investment in
    repurchase agreements; or (c) by lending its portfolio securities.
 
         8. Make short sales of securities.
 
         9. Purchase or sell commodities or commodity futures contracts.
 
        10. Purchase securities on margin, except for such short-term loans as
    are necessary for the clearance of portfolio securities.
 
        11. Engage in the underwriting of securities, except insofar as the Fund
    may be deemed an underwriter under the Securities Act of 1933 in disposing
    of a portfolio security.
 
        12. Invest for the purpose of exercising control or management of any
    other issuer.
 
    In addition, the Fund, as a non-fundamental policy, will not invest in
warrants, although it may acquire warrants attached to other securities
purchased by the Fund.
 
    If a percentage restriction is adhered to at the time of investment, a later
increase or decrease in percentage resulting from a change in values of
portfolio securities or amount of total or net assets will not be considered a
violation of any of the foregoing restrictions.
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
PORTFOLIO TRANSACTIONS AND BROKERAGE
- --------------------------------------------------------------------------------
 
   
    Subject to the general supervision of the Board of Trustees of the Fund, the
Investment Manager is responsible for the investment decisions and the placing
of orders for portfolio transactions for the Fund. The Fund's portfolio
transactions will occur primarily with issuers, underwriters or major dealers in
fixed-income securities acting as principals. Such transactions are normally on
a net basis which do not involve payment of brokerage commissions. The cost of
securities purchased from an underwriter usually includes a commission paid by
the issuer to the underwriter; transactions with dealers normally reflect the
spread between bid and asked prices. During the fiscal years ended August 31,
1996, 1997 and 1998, the Fund did not pay any brokerage commissions.
    
 
   
    The Investment Manager currently serves as investment manager to a number of
clients, including other investment companies, and may in the future act as
investment manager or adviser to others. It is the practice of the Investment
Manager to cause purchase and sale transactions to be allocated among the Fund
and others whose assets it manages in such manner as it deems equitable. In
making such allocations among the Fund and other client accounts, various
factors may be considered, including the respective investment objectives, the
relative size of portfolio holdings of the same or comparable securities, the
availability of cash for investment, the size of investment commitments
generally held and the opinions of the persons responsible for managing the
portfolios of the Fund and other client accounts. In the case of certain initial
and secondary public offerings, the Investment Manager utilizes a pro rata
allocation process based on the size of the Morgan Stanley Dean Witter Funds
involved and the number of shares available from the public offering.
    
 
    The policy of the Fund regarding purchases and sales of securities for its
portfolio is that primary consideration will be given to obtaining the most
favorable prices and efficient executions of
 
                                       18
<PAGE>
transactions. In seeking to implement the Fund's policies, the Investment
Manager effects transactions with those brokers and dealers who the Investment
Manager believes provide the most favorable prices and are capable of providing
efficient executions. If the Investment Manager believes such prices and
executions are obtainable from more than one broker or dealer, it may give
consideration to placing portfolio transactions with those brokers and dealers
who also furnish research and other services to the Fund or the Investment
Manager. Such services may include, but are not limited to, any one or more of
the following: information as to the availability of securities for purchase or
sale; statistical or factual information or opinions pertaining to investment;
wire services; and appraisals or evaluations of portfolio securities.
 
    The information and services received by the Investment Manager from brokers
and dealers may be of benefit to the Investment Manager in the management of
accounts of some of its other clients and may not in all cases benefit the Fund
directly. While the receipt of such information and services is useful in
varying degrees and would generally reduce the amount of research or services
otherwise performed by the Investment Manager and thereby reduce its expenses,
it is of indeterminable value and the management fee paid to the Investment
Manager is not reduced by any amount that may be attributable to the value of
such services.
 
   
    Pursuant to an order of the Securities and Exchange Commission, the Fund may
effect principal transactions in certain money market instruments with DWR. The
Fund will limit its transactions with DWR to U.S. Government and Government
Agency Securities, Bank Money Instruments (i.e., Certificates of Deposit and
Bankers' Acceptances) and Commercial Paper. Such transactions will be effected
with DWR only when the price available from DWR is better than that available
from other dealers. During the fiscal years ended August 31, 1996, 1997 and
1998, the Fund did not effect any principal transactions with DWR.
    
 
   
    Consistent with the policy described above, brokerage transactions in
securities listed on exchanges or admitted to unlisted trading privileges may be
effected through DWR, Morgan Stanley & Co. Incorporated ("MS&Co.") and other
affiliated brokers and dealers. In order for an affiliated broker or dealer to
effect any portfolio transactions for the Fund, the commissions, fees or other
remuneration received by the affiliated broker or dealer must be reasonable and
fair compared to the commissions, fees or other remuneration paid to other
brokers in connection with comparable transactions involving similar securities
being purchased or sold on an exchange during a comparable period of time. This
standard would allow the affiliated broker or dealer to receive no more than the
remuneration which would be expected to be received by an unaffiliated broker in
a commensurate arm's-length transaction. Furthermore, the Board of Trustees of
the Fund, including a majority of the Trustees who are not "interested persons"
of the Fund, as defined in the Act, have adopted procedures which are reasonably
designed to provide that any commissions, fees or other remuneration paid to an
affiliated broker or dealer are consistent with the foregoing standard. For the
fiscal years ended August 31, 1996, 1997 and 1998, the Fund did not effect any
securities transactions with or through DWR. During the period June 1 through
August 31, 1997 and during the fiscal year ended August 31, 1998, the Fund did
not effect any securities transactions with or through MS&Co., which
broker-dealer became an affiliate of the Investment Manager on May 31, 1997 upon
consummation of the merger of Dean Witter, Discover & Co. with Morgan Stanley
Group Inc. The Fund does not reduce the management fee it pays to the Investment
Manager by any amount of the brokerage commissions it may pay to an affiliated
broker or dealer. During the fiscal year ended August 31, 1998 the Fund held
bonds of Salomon Brothers Inc., Merrill Lynch, Pierce, Fenner & Smith Inc. and
Donaldson, Lufkin & Jenrette, which issuers were among the ten brokers or the
ten dealers which executed transactions for or with the Fund in the largest
dollar amounts during the year. At August 31, 1998, the Fund held $3,238,272 of
Salomon Brothers Inc., 6.5% bonds maturing 03/01/2000, $1,509,480 Merrill Lynch,
Pierce Fenner & Smith Inc., 6.0% bonds maturing 01/15/2001 and $2,517,175 of
Donaldson, Lufkin & Jenrette, 6.11% bonds maturing 05/15/2001.
    
 
                                       19
<PAGE>
THE DISTRIBUTOR
- --------------------------------------------------------------------------------
 
   
    As discussed in the Prospectus, shares of the Fund are distributed by Morgan
Stanley Dean Witter Distributors Inc. (the "Distributor"). The Distributor has
entered into a selected dealer agreement with DWR, which through its own sales
organization sells shares of the Fund. In addition, the Distributor may enter
into selected dealer agreements with other selected broker-dealers. The
Distributor, a Delaware corporation, is a wholly-owned subsidiary of MSDW. The
Trustees of the Fund, including a majority of the Trustees who are not, and were
not at the time they voted, interested persons of the Fund, as defined in the
Act (the "Independent Trustees"), approved, at their meeting held on June 30,
1997, the current Distribution Agreement appointing the Distributor exclusive
distributor of the Fund's shares and providing for the Distributor to bear
distribution expenses not borne by the Fund. By its terms, the Distribution
Agreement had an initial term ending April 30, 1998 and will remain in effect
from year to year thereafter if approved by the Board. At their meeting held on
April 30, 1998, the Trustees of the Fund, including a majority of the
Independent Trustees, approved the continuation of the Distribution Agreement
until April 30, 1999.
    
 
   
    The Distributor bears all expenses it may incur in providing services under
the Distribution Agreement. Such expenses include the payment of commissions for
sales of the Fund's shares and incentive compensation to Morgan Stanley Dean
Witter Financial Advisors or other selected broker-dealer representatives. The
Distributor also pays certain expenses in connection with the distribution of
the Fund's shares, including the costs of preparing, printing and distributing
advertising or promotional materials, and the costs of printing and distributing
prospectuses and supplements thereto used in connection with the offering and
sale of the Fund's shares. The Fund bears the costs of initial typesetting,
printing and distribution of prospectuses and supplements thereto to
shareholders. The Fund also bears the costs of registering the Fund and its
shares under federal securities laws and pays filing fees in accordance with
state securities laws. The Fund and the Distributor have agreed to indemnify
each other against certain liabilities, including liabilities under the
Securities Act of 1933, as amended. Under the Distribution Agreement, the
Distributor uses its best efforts in rendering services to the Fund, but in the
absence of willful misfeasance, bad faith, gross negligence or reckless
disregard of its obligations, the Distributor is not liable to the Fund or any
of its shareholders for any error of judgment or mistake of law or for any act
or omission or for any losses sustained by the Fund or its shareholders.
    
 
PLAN OF DISTRIBUTION.
 
   
    The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under the
Act (the "Plan") pursuant to which each Class, other than Class D, pays the
Distributor compensation accrued daily and payable monthly at the following
annual rates: 0.25% and 0.85% of the average daily net assets of Class A and
Class C, respectively, and, with respect to Class B, 0.85% of the lesser of: (a)
the average daily aggregate gross sales of the Fund's Class B shares since the
inception of the Fund (not including reinvestments of dividends or capital gains
distributions), less the average daily aggregate net asset value of the Fund's
Class B shares redeemed since the Fund's inception upon which a contingent
deferred sales charge has been imposed or upon which such charge has been
waived; or (b) the average daily net assets of Class B. The Distributor also
receives the proceeds of front-end sales charges and of contingent deferred
sales charges imposed on certain redemptions of shares, which are separate and
apart from payments made pursuant to the Plan (see "Purchase of Fund Shares" in
the Prospectus). The Distributor has informed the Fund that it and/or DWR
received (a) approximately $364,492, $285,035 and $191,024 in contingent
deferred sales charges from Class B for the fiscal years ended August 31, 1996,
1997 and 1998, respectively, (b) approximately $722 in contingent deferred sales
charges from Class C for the fiscal year ended August 31, 1998, and (c)
approximately $12,907 in front-end sales charges from Class A for the fiscal
year ended August 31, 1998, none of which was retained by the Distributor. No
front-end sales charges were received from Class A during the fiscal year ended
August 31, 1997, no contingent deferred sales charges were received from Class A
during the fiscal years ended August 31, 1997 and 1998, and no contingent
deferred sales charges were received from Class C during the fiscal year ended
August 31, 1997.
    
 
                                       20
<PAGE>
    The Distributor has informed the Fund that the entire fee payable by Class A
and a portion of the fees payable by each of Class B and Class C each year
pursuant to the Plan equal to 0.20% of the average daily net assets of Class B
and 0.25% of the average daily net assets of Class C are currently each
characterized as a "service fee" under the Rules of the Association of the
National Association of Securities Dealers, Inc. (of which the Distributor is a
member). The "service fee" is a payment made for personal service and/or the
maintenance of shareholder accounts. The remaining portion of the Plan fees
payable by a Class, if any, is characterized as an "asset-based sales charge" as
such is defined by the aforementioned Rules of the Association.
 
    The Plan was adopted by a vote of the Trustees of the Fund on April 27,
1989, at a Meeting of the Trustees called for the purpose of voting on such
Plan. The vote included the vote of a majority of the Trustees of the Fund who
are not "interested persons" of the Fund (as defined in the Act) and who have no
direct or indirect financial interest in the operation of the Plan (the
"Independent 12b-1 Trustees"). In making their decision to adopt the Plan, the
Trustees requested from DWR and received such information as they deemed
necessary to make an informed determination as to whether or not adoption of the
Plan was in the best interests of the shareholders of the Fund. After due
consideration of the information received, the Trustees, including the
Independent 12b-1 Trustees, determined that adoption of the Plan would benefit
the shareholders of the Fund. DWR, as then sole shareholder of the Fund,
approved the Plan on April 28, 1989, and the Plan was approved by shareholders
of the Fund at a Meeting of Shareholders on December 21, 1989.
 
    At their meeting held on October 30, 1992, the Trustees of the Fund,
including all of the Independent 12b-1 Trustees, approved certain amendments to
the Plan which took effect in January, 1993 and were designed to reflect the
fact that upon an internal reorganization the share distribution activities
theretofore performed for the Fund by DWR were assumed by the Distributor and
DWR's sales activities are now being performed pursuant to the terms of a
selected dealer agreement between the Distributor and DWR. The amendments
provide that payments under the Plan will be made to the Distributor rather than
to DWR as before the amendment, and that the Distributor in turn is authorized
to make payments to DWR, its affiliates or other selected broker-dealers (or
direct that the Fund pay such entities directly). The Distributor is also
authorized to retain part of such fee as compensation for its own
distribution-related expenses. At their meeting held on April 28, 1993, the
Trustees, including a majority of the Independent 12b-1 Trustees, also approved
certain technical amendments to the Plan in connection with amendments adopted
by the National Association of Securities Dealers, Inc. to its Rules of the
Association. At their meeting held on October 26, 1995, the Trustees of the
Fund, including all of the Independent 12b-1 Trustees, approved an amendment to
the Plan to permit payments to be made under the Plan with respect to certain
distribution expenses incurred in connection with the distribution of shares,
including personal services to shareholders with respect to holdings of such
shares, of an investment company whose assets are acquired by the Fund in a
tax-free reorganization. At their meeting held on June 30, 1997, the Trustees,
including a majority of the Independent 12b-1 Trustees, approved amendments to
the Plan to reflect the multiple-class structure for the Fund, which took effect
on July 28, 1997.
 
   
    Under the Plan and as required by Rule 12b-1, the Trustees will receive and
review promptly after the end of each fiscal quarter a written report provided
by the Distributor of the amounts expended by the Distributor under the Plan and
the purpose for which such expenditures were made. Class B shares of the Fund
accrued $1,300,714 payable to the Distributor, pursuant to the Plan, for the
fiscal year ended August 31, 1998. This is an accrual at an annual rate of 0.85%
of the average daily net assets of Class B and was calculated pursuant to clause
(b) of the compensation formula under the Plan. This amount is treated by the
Fund as an expense in the year it is accrued. For the fiscal year ended August
31, 1998, Class A and Class C shares of the Fund accrued payments under the Plan
amounting to $4,202 and $1,925, respectively, which amounts are equal to 0.24%
and 0.85% of the average daily net assets of Class A and Class C, respectively,
for the fiscal year.
    
 
    The Plan was adopted in order to permit the implementation of the Fund's
method of distribution. Under this distribution method the Fund offers four
Classes of shares, each with a different distribution arrangement as set forth
in the Prospectus.
 
                                       21
<PAGE>
   
    With respect to Class A shares, DWR compensates its account executives by
paying them, from proceeds of the front-end sales charge, commissions for the
sale of Class A shares, currently a gross sales credit of up to 4.0% of the
amount sold (except as provided in the following sentence) and an annual
residual commission, currently a residual of up to 0.20% of the current value of
the respective accounts for which they are the Financial Advisors or dealers of
record in all cases. On orders of $1 million or more (for which no sales charge
was paid) or net asset value purchases employer sponsored 401(k) and other plans
qualified under Section 401(a) of the Internal Revenue Code ("Qualified
Retirement Plans") for which Morgan Stanley Dean Witter Trust FSB ("MSDW Trust")
serves as Trustee or DWR's Retirement Plan Services serves as recordkeeper
pursuant to a written Recordkeeping Services Agreement, the Investment Manager
compensates DWR's Financial Advisors by paying them, from its own funds, a gross
sales credit of 1.0% of the amount sold.
    
 
   
    With respect to Class B shares, DWR compensates its Financial Advisors by
paying them, from its own funds, commissions for the sale of Class B shares,
currently a gross sales credit of up to 4.0% of the amount sold (except as
provided in the following sentence) and an annual residual commission, currently
a residual of up to 0.20% of the current value (not including reinvested
dividends or distributions) of the amount sold in all cases. In the case of
Class B shares purchased on or after July 28, 1997 by Qualified Retirement Plans
for which MSDW Trust serves as Trustee or DWR's Retirement Plan Services serves
as recordkeeper pursuant to a written Recordkeeping Services Agreement, DWR
compensates its Financial Advisors by paying them, from its own funds, a gross
sales credit of 3.0% of the amount sold.
    
 
   
    With respect to Class C shares, DWR compensates its Financial Advisors by
paying them, from its own funds, commissions for the sale of Class C shares,
currently a gross sales credit of up to 1.0% of the amount sold and an annual
residual commission, currently a residual of up to 0.85% of the current value of
the respective accounts for which they are the Financial Advisors of record.
    
 
   
    With respect to Class D shares other than shares held by participants in
MSDW Advisors mutual fund asset allocation program, the Investment Manager
compensates DWR's Financial Advisors by paying them, from its own funds,
commissions for the sale of Class D shares, currently a gross sales credit of up
to 1.0% of the amount sold. There is a chargeback of 100% of the amount paid if
the Class D shares are redeemed in the first year and a chargeback of 50% of the
amount paid if the Class D shares are redeemed in the second year after
purchase. The Investment Manager also compensates DWR's Financial Advisors by
paying them, from its own funds, an annual residual commission, currently a
residual of up to 0.10% of the current value of the respective accounts for
which they are the Financial Advisors of record (not including accounts of
participants in the MSDW Advisors mutual fund asset allocation program).
    
 
   
    The gross sales credit is a charge which reflects commissions paid by DWR to
its Financial Advisors and DWR's Fund-associated distribution-related expenses,
including sales compensation, and overhead and other branch office
distribution-related expenses including (a) the expenses of operating DWR's
branch offices in connection with the sale of Fund shares, including lease
costs, the salaries and employee benefits of operations and sales support
personnel, utility costs, communications costs and the costs of stationery and
supplies, (b) the costs of client sales seminars, (c) travel expenses of mutual
fund sales coordinators to promote the sale of Fund shares and (d) other
expenses relating to branch promotion of Fund sales. The distribution fee that
the Distributor receives from the Fund under the Plan, in effect, offsets
distribution expenses incurred under the Plan on behalf of the Fund and, in the
case of Class B shares, opportunity costs, such as the gross sales credit and an
assumed interest charge thereon ("carrying charge"). In the Distributor's
reporting of the distribution expenses to the Fund, in the case of Class B
shares, such assumed interest (computed at the "broker's call rate") has been
calculated on the gross credit as it is reduced by amounts received by the
Distributor under the Plan and any contingent deferred sales charges received by
the Distributor upon redemption of shares of the Fund. No other interest charge
is included as a distribution expense in the Distributor's calculation of its
distribution costs for this purpose. The broker's call rate is the interest rate
charged to securities brokers on loans secured by exchange-listed securities.
    
 
                                       22
<PAGE>
   
    The Fund is authorized to reimburse expenses incurred or to be incurred in
promoting the distribution of the Fund's Class A and Class C shares and in
servicing shareholder accounts. Reimbursement will be made through payments at
the end of each month. The amount of each monthly payment may in no event exceed
an amount equal to a payment at the annual rate of 0.25%, in the case of Class
A, and 0.85%, in the case of Class C, of the average net assets of the
respective Class during the month. No interest or other financing charges, if
any, incurred on any distribution expenses on behalf of Class A and Class C will
be reimbursable under the Plan. With respect to Class A, in the case of all
expenses other than expenses representing the service fee, and, with respect to
Class C, in the case of all expenses other than expenses representing a gross
sales credit or a residual to Morgan Stanley Dean Witter Financial Advisors or
other selected broker-dealer representatives, such amounts shall be determined
at the beginning of each calendar quarter by the Trustees, including a majority
of the Independent 12b-1 Trustees. Expenses representing the service fee (for
Class A) or a gross sales credit or a residual to Morgan Stanley Dean Witter
Financial Advisors or other selected broker-dealer representatives (for Class C)
may be reimbursed without prior determination. In the event that the Distributor
proposes that monies shall be reimbursed for other than such expenses, then in
making quarterly determinations of the amounts that may be reimbursed by the
Fund, the Distributor will provide and the Trustees will review a quarterly
budget of projected distribution expenses to be incurred on behalf of the Fund,
together with a report explaining the purposes and anticipated benefits of
incurring such expenses. The Trustees will determine which particular expenses,
and the portions thereof, that may be borne by the Fund, and in making such a
determination shall consider the scope of the Distributor's commitment to
promoting the distribution of the Fund's Class A and Class C shares.
    
 
   
    Each Class paid 100% of the amounts accrued under the Plan with respect to
the Class for the fiscal year ended August 31, 1998, to the Distributor. The
Distributor and DWR estimate that they have spent, pursuant to the Plan,
$22,570,107 on behalf of Class B since the inception of the Plan. It is
estimated that this amount was spent in approximately the following ways: (i)
11.98% ($2,703,259)--advertising and promotional expenses; (ii) 0.83%
($187,321)--printing of prospectuses for distribution to other than current
shareholders; and (iii) 87.19% ($19,679,527)--other expenses, including the
gross sales credit and the carrying charge, of which 9.95% ($1,957,424)
represents carrying charges, 36.83% ($7,248,340) represents commission credits
to DWR branch offices and other selected broker-dealers for payments of
commissions to Morgan Stanley Dean Witter Financial Advisors and other selected
broker-dealer representatives, and 53.22% ($10,473,763) represents overhead and
other branch office distribution-related expenses. The amounts accrued by Class
A and Class C for distribution during the fiscal year ended August 31, 1998 were
for expenses which relate to compensation of sales personnel and associated
overhead expenses.
    
 
   
    In the case of Class B shares, at any given time, the expenses in
distributing shares of the Fund may be more or less than the total of (i) the
payments made by the Fund pursuant to the Plan and (ii) the proceeds of
contingent deferred sales charges paid by investors upon redemption of shares.
The Distributor has advised the Fund that in the case of Class B shares such
excess amount, including the carrying charge designed to approximate the
opportunity costs incurred which arise from it having advanced monies without
having received the amount of any sales charges imposed at the time of sale of
the Fund's Class B shares, totalled $5,232,570 as of August 31, 1998. Because
there is no requirement under the Plan that the Distributor be reimbursed for
all expenses with respect to Class B shares or any requirement that the Plan be
continued from year to year, this excess amount does not constitute a liability
of the Fund. Although there is no legal obligation for the Fund to pay
distribution expenses in excess of payments made under the Plan and the proceeds
of contingent deferred sales charges paid by investors upon redemption of
shares, if for any reason the Plan is terminated, the Trustees will consider at
that time the manner in which to treat such expenses. Any cumulative expenses
incurred, but not yet recovered through distribution fees or contingent deferred
sales charges, may or may not be recovered through future distribution fees or
contingent deferred sales charges.
    
 
    No interested person of the Fund, nor any Trustee of the Fund who is not an
interested person of the Fund, as defined in the Act, has any direct or indirect
financial interest in the operation of the Plan except
 
                                       23
<PAGE>
   
to the extent that the Distributor, MSDW Advisors, MSDW Services, DWR or certain
of their employees may be deemed to have such an interest as a result of
benefits derived from the successful operation of the Plan or as a result of
receiving a portion of the amounts expended thereunder by the Fund.
    
 
   
    Under its terms, the Plan continued until April 30, 1990 and will remain in
effect from year to year thereafter, provided such continuance is approved
annually by a vote of the Trustees in the manner described above. The most
recent continuance of the Plan for one year, until April 30, 1999, was approved
by the Board of Trustees of the Fund, including a majority of the Independent
12b-1 Trustees, at a Board meeting held on April 30, 1998. Prior to approving
the continuation of the Plan, the Trustees requested and received from the
Distributor and reviewed all the information which they deemed necessary to
arrive at an informed determination. In making their determination to continue
the Plan, the Trustees considered: (1) the Fund's experience under the Plan and
whether such experience indicates that the Plan is operating as anticipated; (2)
the benefits the Fund had obtained, was obtaining and would be likely to obtain
under the Plan; and (3) what services had been provided and were continuing to
be provided under the Plan the Distributor to the Fund and its shareholders.
Based upon their review, the Trustees of the Fund, including each of the
Independent 12b-1 Trustees, determined that continuation of the Plan would be in
the best interest of the Fund and would have a reasonable likelihood of
continuing to benefit the Fund and its shareholders. In the Trustees' quarterly
review of the Plan, they will consider its continued appropriateness and the
level of compensation provided therein.
    
 
    The Plan may not be amended to increase materially the amount to be spent
for the services described therein without approval of the shareholders of the
affected Class or Classes of the Fund, and all material amendments of the Plan
must also be approved by the Trustees in the manner described above. The Plan
may be terminated at any time, without payment of any penalty, by vote of a
majority of the Independent 12b-1 Trustees or by a vote of a majority of the
outstanding voting securities of the Fund (as defined in the Act) on not more
than thirty days written notice to any other party to the Plan. So long as the
Plan is in effect, the election and nomination of Independent 12b-1 Trustees
shall be committed to the discretion of the Independent 12b-1 Trustees.
 
DETERMINATION OF NET ASSET VALUE
- --------------------------------------------------------------------------------
 
    Short-term securities with remaining maturities of sixty days or less at the
time of purchase are valued at amortized cost, unless the Trustees determine
such does not reflect the securities' market value, in which case these
securities will be valued at their fair value as determined by the Trustees.
Other short-term debt securities will be valued on a mark-to-market basis until
such time as they reach a remaining maturity of sixty days, whereupon they will
be valued at amortized cost using their value on the 61st day unless the
Trustees determine such does not reflect the securities' market value, in which
case these securities will be valued at their fair value as determined by the
Trustees. All other securities and other assets are valued at their fair value
as determined in good faith under procedures established by and under the
supervision of the Trustees.
 
    As discussed in the Prospectus, the net asset value per share for each Class
of shares of the Fund is determined once daily at 4:00 p.m., New York time (or,
on days when the New York Stock Exchange closes prior to 4:00 p.m., at such
earlier time), on each day that the New York Stock Exchange is open by taking
the value of all assets of the Fund, subtracting its liabilities, dividing by
the number of shares outstanding and adjusting to the nearest cent. The New York
Stock Exchange currently observes the following holidays: New Year's Day,
Reverend Dr. Martin Luther King, Jr. Day, Presidents' Day, Good Friday, Memorial
Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day.
 
                                       24
<PAGE>
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund offers four Classes of shares as
follows:
 
INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES
 
    Class A shares are sold to investors with an initial sales charge that
declines to zero for larger purchases; however, Class A shares sold without an
initial sales charge are subject to a contingent deferred sales charge ("CDSC")
of 1.0% if redeemed within one year of purchase, except in the circumstances
discussed in the Prospectus.
 
   
    RIGHT OF ACCUMULATION.  As discussed in the Prospectus, investors may
combine the current value of shares purchased in separate transactions for
purposes of benefitting from the reduced sales charges available for purchases
of shares of the Fund totalling at least $25,000 in net asset value. For
example, if any person or entity who qualifies for this privilege holds Class A
shares of the Fund and/or other Morgan Stanley Dean Witter Funds that are
multiple class funds ("Morgan Stanley Dean Witter Multi-Class Funds") or shares
of other Morgan Stanley Dean Witter Funds sold with a front-end sales charge
purchased at a price including a front-end sales charge having a current value
of $5,000, and purchases $20,000 of additional shares of the Fund, the sales
charge applicable to the $20,000 purchase would be 4.0% of the offering price.
    
 
   
    The Distributor must be notified by the selected broker-dealer or the
shareholder at the time a purchase order is placed that the purchase qualifies
for the reduced charge under the Right of Accumulation. Similar notification
must be made in writing by the selected broker-dealer or shareholder when such
an order is placed by mail. The reduced sales charge will not be granted if: (a)
such notification is not furnished at the time of the order; or (b) a review of
the records of the Distributor or Morgan Stanley Dean Witter Trust FSB (the
"Transfer Agent") fails to confirm the investor's represented holdings.
    
 
    LETTER OF INTENT.  As discussed in the Prospectus, reduced sales charges are
available to investors who enter into a written Letter of Intent providing for
the purchase, within a thirteen-month period, of Class A shares of the Fund from
the Distributor or from a single Selected Broker-Dealer.
 
    A Letter of Intent permits an investor to establish a total investment goal
to be achieved by any number of purchases over a thirteen-month period. Each
purchase of Class A shares made during the period will receive the reduced sales
commission applicable to the amount represented by the goal, as if it were a
single purchase. A number of shares equal in value to 5% of the dollar amount of
the Letter of Intent will be held in escrow by the Transfer Agent, in the name
of the shareholder. The initial purchase under a Letter of Intent must be equal
to at least 5% of the stated investment goal.
 
    The Letter of Intent does not obligate the investor to purchase, nor the
Fund to sell, the indicated amount. In the event the Letter of Intent goal is
not achieved within the thirteen-month period, the investor is required to pay
the difference between the sales charge otherwise applicable to the purchases
made during this period and sales charges actually paid. Such payment may be
made directly to the Distributor or, if not paid, the Distributor is authorized
by the shareholder to liquidate a sufficient number of his or her escrowed
shares to obtain such difference.
 
   
    If the goal is exceeded and purchases pass the next sales charge level, the
sales charge on the entire amount of the purchase that results in passing that
level and on subsequent purchases will be subject to further reduced sales
charges in the same manner as set forth above under "Right of Accumulation," but
there will be no retroactive reduction of sales charges on previous purchases.
For the purpose of determining whether the investor is entitled to a further
reduced sales charge applicable to purchases at or above a sales charge level
which exceeds the stated goal of a Letter of Intent, the cumulative current net
asset value of any shares owned by the investor in any other Morgan Stanley Dean
Witter Funds held by the shareholder which were previously purchased at a price
including a front-end sales charge (including shares of the Fund and other
Morgan Stanley Dean Witter Funds acquired in exchange for those shares, and
including in each case shares acquired through reinvestment of dividends and
distributions) will be added to the cost or net asset value of shares of the
Fund owned by
    
 
                                       25
<PAGE>
   
the investor. However, shares of "Exchange Funds" (see "Shareholder
Services--Exchange Privilege") and the purchase of shares of other Morgan
Stanley Dean Witter Funds will not be included in determining whether the stated
goal of a Letter of Intent has been reached.
    
 
    At any time while a Letter of Intent is in effect, a shareholder may, by
written notice to the Distributor, increase the amount of the stated goal. In
that event, only shares purchased during the previous 90-day period and still
owned by the shareholder will be included in the new sales charge reduction. The
5% escrow and minimum purchase requirements will be applicable to the new stated
goal. Investors electing to purchase shares of the Fund pursuant to a Letter of
Intent should carefully read such Letter of Intent.
 
CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE--CLASS B SHARES
 
   
    Class B shares are sold without an initial sales charge but are subject to a
CDSC payable upon most redemptions within six years after purchase. As stated in
the Prospectus, a CDSC will be imposed on any redemption by an investor if after
such redemption the current value of the investor's Class B shares of the Fund
is less than the dollar amount of all payments by the shareholder for the
purchase of Class B shares during the preceding six years (or, in the case of
shares held by certain Qualified Retirement Plans, three years). However, no
CDSC will be imposed to the extent that the net asset value of the shares
redeemed does not exceed: (a) the current net asset value of shares purchased
more than six years (or, in the case of shares held by certain Qualified
Retirement Plans, three years) prior to the redemption, plus (b) the current net
asset value of shares purchased through reinvestment of dividends or
distributions of the Fund or another Morgan Stanley Dean Witter Fund (see
"Shareholder Services-- Targeted Dividends"), plus (c) the current net asset
value of shares acquired in exchange for (i) shares of Morgan Stanley Dean
Witter front-end sales charge funds, or (ii) shares of other Morgan Stanley Dean
Witter Funds for which shares of front-end sales charge funds have been
exchanged (see "Shareholder Services--Exchange Privilege"), plus (d) increases
in the net asset value of the investor's shares above the total amount of
payments for the purchase of Fund shares made during the preceding six (three)
years. The CDSC will be paid to the Distributor.
    
 
   
    In determining the applicability of the CDSC to each redemption, the amount
which represents an increase in the net asset value of the investor's shares
above the amount of the total payments for the purchase of shares within the
last six years (or, in the case of shares held by certain Qualified Retirement
Plans, three years) will be redeemed first. In the event the redemption amount
exceeds such increase in value, the next portion of the amount redeemed will be
the amount which represents the net asset value of the investor's shares
purchased more than six (three) years prior to the redemption and/or shares
purchased through reinvestment of dividends or distributions and/or shares
acquired in exchange for shares of Morgan Stanley Dean Witter front-end sales
charge funds, or for shares of other Morgan Stanley Dean Witter Funds for which
shares of front-end sales charge funds have been exchanged. A portion of the
amount redeemed which exceeds an amount which represents both such increase in
value and the value of shares purchased more than six years (or, in the case of
shares held by certain Qualified Retirement Plans, three years) prior to the
redemption and/or shares purchased through reinvestment of dividends or
distributions and/or shares acquired in the above-described exchanges will be
subject to a CDSC.
    
 
    The amount of the CDSC, if any, will vary depending on the number of years
from the time of payment for the purchase of Class B shares of the Fund until
the time of redemption of such shares. For purposes of determining the number of
years from the time of any payment for the purchase of shares, all payments made
during a month will be aggregated and deemed to have been made on the last day
of
 
                                       26
<PAGE>
the month. The following table sets forth the rates of the CDSC applicable to
most Class B shares of the Fund:
 
<TABLE>
<CAPTION>
                                       YEAR SINCE
                                        PURCHASE                                             CDSC AS A PERCENTAGE OF
                                      PAYMENT MADE                                               AMOUNT REDEEMED
- -----------------------------------------------------------------------------------------  ---------------------------
<S>                                                                                        <C>
First....................................................................................                5.0%
Second...................................................................................                4.0%
Third....................................................................................                3.0%
Fourth...................................................................................                2.0%
Fifth....................................................................................                2.0%
Sixth....................................................................................                1.0%
Seventh and thereafter...................................................................             None
</TABLE>
 
   
    The following table sets forth the rates of the CDSC applicable to Class B
shares of the Fund purchased on or after July 28, 1997 by Qualified Retirement
Plans for which MSDW Trust serves as Trustee or DWR's Retirement Plan Services
serves as a recordkeeper pursuant to a written Recordkeeping Services Agreement.
    
 
<TABLE>
<CAPTION>
                                       YEAR SINCE
                                        PURCHASE                                             CDSC AS A PERCENTAGE OF
                                      PAYMENT MADE                                               AMOUNT REDEEMED
- -----------------------------------------------------------------------------------------  ---------------------------
<S>                                                                                        <C>
First....................................................................................                2.0%
Second...................................................................................                2.0%
Third....................................................................................                1.0%
Fourth and thereafter....................................................................             None
</TABLE>
 
   
    In determining the rate of the CDSC, it will be assumed that a redemption is
made of shares held by the investor for the longest period of time within the
applicable six-year or three-year period. This will result in any such CDSC
being imposed at the lowest possible rate. The CDSC will be imposed, in
accordance with the table shown above, on any redemptions within six years (or,
in the case of shares held by certain Qualified Retirement Plans, three years)
of purchase which are in excess of these amounts and which redemptions do not
qualify for waiver of the CDSC, as described in the Prospectus.
    
 
LEVEL LOAD ALTERNATIVE--CLASS C SHARES
 
    Class C shares are sold without a sales charge but are subject to a CDSC of
1.0% on most redemptions made within one year after purchase, except in the
circumstances discussed in the Prospectus.
 
NO LOAD ALTERNATIVE--CLASS D SHARES
 
    Class D shares are offered without any sales charge on purchase or
redemption. Class D shares are offered only to those persons meeting the
qualifications set forth in the Prospectus.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
   
    Upon the purchase of shares of the Fund, a Shareholder Investment Account is
opened for the investor on the books of the Fund and maintained by Morgan
Stanley Dean Witter Trust FSB (the "Transfer Agent"). This is an open account in
which shares owned by the investor are credited by the Transfer Agent in lieu of
issuance of a share certificate. If a share certificate is desired, it must be
requested in writing for each transaction. Certificates are issued only for full
shares and may be redeposited in the account at any time. There is no charge to
the investor for issuance of a certificate. Whenever a shareholder-instituted
transaction takes place in the Shareholder Investment Account, the shareholder
will be mailed a confirmation of the transaction from the Fund or from DWR or
another selected broker-dealer.
    
 
    INVESTMENT OF DIVIDENDS OR DISTRIBUTIONS RECEIVED IN CASH.  As discussed in
the Prospectus, any shareholder who receives a cash payment representing a
dividend or distribution may invest such
 
                                       27
<PAGE>
dividend or distribution in shares of the applicable Class at net asset value,
without the imposition of a CDSC upon redemption, by returning the check or the
proceeds to the Transfer Agent within 30 days after the payment date. If the
shareholder returns the proceeds of a dividend or distribution, such funds must
be accompanied by a signed statement indicating that the proceeds constitute a
dividend or distribution to be invested. Such investment will be made at the net
asset value per share next determined after receipt of the check or proceeds by
the Transfer Agent.
 
    AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS.  As stated in the
Prospectus, all income dividends and capital gains distributions are
automatically paid in full and fractional shares of the applicable Class of the
Fund, unless the shareholder requests that they be paid in cash. Each purchase
of shares of the Fund is made upon the condition that the Transfer Agent is
thereby automatically appointed as agent of the investor to receive all
dividends and capital gains distributions on shares owned by the investor. Such
dividends and distributions will be paid, at the net asset value per share, in
shares of the applicable Class of the Fund (or in cash if the shareholder so
requests) as of the close of business on the monthly payment date, as stated in
the Prospectus. At any time an investor may request the Transfer Agent, in
writing, to have subsequent dividends and/or capital gains distributions paid to
him or her in cash rather than shares. To assure sufficient time to process the
change, such request should be received by the Transfer Agent as least five
business days prior to the payment date of the dividend or distribution or the
record date of the distribution. In the case of recently purchased shares for
which registration instructions have not been received on the record date, cash
payments will be made to the Distributor, which will be forwarded to the
shareholder, upon the receipt of proper instructions. It has been and remains
the Fund's policy and practice that, if checks for dividends or distributions
paid in cash remain uncashed, no interest will accrue on amounts represented by
such uncashed checks.
 
   
    TARGETED DIVIDENDS-SM-.  In states where it is legally permissible,
shareholders may also have all income dividends and capital gains distributions
automatically invested in shares of any Class of a Morgan Stanley Dean Witter
Fund other than Morgan Stanley Dean Witter Intermediate Income Securities or in
another Class of Morgan Stanley Dean Witter Intermediate Income Securities. Such
investment will be made as described above for automatic investment in shares of
the applicable Class of the Fund, at the net asset value per share of the
selected Morgan Stanley Dean Witter Fund as of the close of business on the
payment date of the dividend or distribution and will begin to earn dividends,
if any, in the selected Morgan Stanley Dean Witter Fund the next business day.
To participate in the Targeted Dividends program, shareholders should contact
their Morgan Stanley Dean Witter Financial Advisor or other selected
broker-dealer representative or the Transfer Agent. Shareholders of the Fund
must be shareholders of the selected Class of the Morgan Stanley Dean Witter
Fund targeted to receive investments from dividends at the time they enter the
Targeted Dividends program. Investors should review the prospectus of the
targeted Morgan Stanley Dean Witter Fund before entering the program.
    
 
   
    EASYINVEST-SM-.  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
transferred automatically from a checking or savings account or following
redemption of shares of a Morgan Stanley Dean Witter money market fund, on a
semi-monthly, monthly or quarterly basis, to the Transfer Agent for investment
in shares of the Fund. Shares purchased through EasyInvest will be added to the
shareholder's existing account at the net asset value calculated the same
business day the transfer of funds is effected (subject to any applicable sales
charges). Shares of the Morgan Stanley Dean Witter money market funds redeemed
in connection with EasyInvest are redeemed on the business day preceding the
transfer of funds. For further information or to subscribe to EasyInvest,
shareholders should contact their Morgan Stanley Dean Witter Financial Advisor
or other selected broker-dealer representative or the Transfer Agent.
    
 
   
    SYSTEMATIC WITHDRAWAL PLAN.  As discussed in the Prospectus, a systematic
withdrawal plan (the "Withdrawal Plan") is available for shareholders whose
shares of Morgan Stanley Dean Witter Funds have an aggregate value of $10,000 or
more. Shares of any Fund from which redemptions will be made pursuant to the
Plan must have a value of $1,000 or more (referred to as a "SWP Fund"). The
required share values are determined on the date the shareholder establishes the
Withdrawal Plan. The Withdrawal Plan provides for monthly, quarterly,
semi-annual or annual payments in any amount not less
    
 
                                       28
<PAGE>
   
than $25, or in any whole percentage of the value of the SWP Funds' shares, on
an annualized basis. Any applicable Contingent Deferred Sales Charge ("CDSC")
will be imposed on shares redeemed under the Withdrawal Plan (see "Purchase of
Fund Shares"), except that the CDSC, if any, will be waived on redemptions under
the Withdrawal Plan of up to 12% annually of the value of each SWP Fund account,
based on the share values next determined after the shareholder establishes the
Withdrawal Plan. Redemptions for which this CDSC waiver policy applies may be in
amounts up to 1% per month, 3% per quarter, 6% semi-annually or 12% annually.
Under this CDSC waiver policy, amounts withdrawn each period will be paid by
first redeeming shares not subject to a CDSC because the shares were purchased
by the reinvestment of dividends or capital gains distributions, the CDSC period
has elapsed or some other waiver of the CDSC applies. If shares subject to a
CDSC must be redeemed, shares held for the longest period of time will be
redeemed first and continuing with shares held the next longest period of time
until shares held the shortest period of time are redeemed. Any shareholder
participating in the Withdrawal Plan will have sufficient shares redeemed from
his or her account so that the proceeds (net of any applicable CDSC) to the
shareholder will be the designated monthly, quarterly, semi-annual or annual
amount.
    
 
   
    A shareholder may suspend or terminate participation in the Withdrawal Plan
at any time. A shareholder who has suspended participation may resume payments
under the Withdrawal Plan, without requiring a new determination of the account
value for the 12% CDSC waiver. The Withdrawal Plan may be terminated or revised
at any time by the Fund.
    
 
   
    Prior to adding an additional SWP Fund to an existing Withdrawal Plan, the
required $10,000/$1,000 share values must be met, to be calculated on the date
the shareholder adds the additional SWP Fund. However, the addition of a new SWP
Fund will not change the account value for the 12% CDSC waiver for the SWP Funds
already participating in the Withdrawal Plan.
    
 
   
    The Transfer Agent acts as agent for the shareholder in tendering to the
Fund for redemption sufficient full and fractional shares to provide the amount
of the periodic withdrawal payment designated in the application. The shares
will be redeemed at their net asset value determined, at the shareholder's
option, on the tenth or twenty-fifth day (or next following business day) of the
relevant month, quarter, or semi-annual or annual period and normally a check
for the proceeds will be mailed by the Transfer Agent, or amounts credited to a
shareholder's Dean Witter Reynolds Inc. or other selected broker-dealer
brokerage account, or amounts deposited electronically into the shareholder's
bank account via the Automated Clearing House, within five business days after
the date of redemption.
    
 
   
    Withdrawal Plan payments should not be considered as dividends, yields or
income. If periodic withdrawal plan payments continuously exceed net investment
income and net capital gains, the shareholder's original investment will be
correspondingly reduced and ultimately exhausted. Each withdrawal constitutes a
redemption of shares and any gain or loss realized must be recognized for
federal income tax purposes. Although a shareholder may make additional
investments while participating in the Withdrawal Plan, withdrawals made
concurrently with purchases of additional shares are inadvisable because of
sales charges applicable to purchases or redemptions of shares (see "Purchase of
Fund Shares" in the Prospectus).
    
 
   
    Any shareholder who wishes to have payments under the Withdrawal Plan made
to a third party or sent to an address other than the one listed on the account
must send complete written instructions to the Transfer Agent to enroll in the
Withdrawal Plan. The shareholder's signature on such instructions must be
guaranteed by an eligible guarantor acceptable to the Transfer Agent
(shareholders should contact the Transfer Agent for a determination as to
whether a particular institution is such an eligible guarantor). A shareholder
may, at any time, change the amount and interval of withdrawal payments through
his or her Morgan Stanley Dean Witter Financial Advisor or other selected
broker-dealer representative or by written notification to the Transfer Agent.
In addition, the party and/or the address to which checks are mailed may be
changed by written notification to the Transfer Agent, with signature guarantees
required in the manner described above. The shareholder may also terminate the
Withdrawal Plan at any time by written notice to the Transfer Agent. In the
event of such termination, the
    
 
                                       29
<PAGE>
   
account will be continued as a regular Shareholder Investment Account. The
shareholder may also redeem all or part of the shares held in the Withdrawal
Plan account (see "Redemptions and Repurchases" in the Prospectus) at any time.
    
 
   
    DIRECT INVESTMENTS THROUGH TRANSFER AGENT.  As discussed in the Prospectus,
shareholders may make additional investments in any Class of shares of the Fund
for which they qualify at any time by sending a check in any amount, not less
than $100, payable to Morgan Stanley Dean Witter Intermediate Income Securities,
and indicating the selected Class, directly to the Fund's Transfer Agent. In the
case of Class A shares, after deduction of any applicable sales charge, the
balance will be applied to the purchase of Fund shares, and, in the case of
shares of the other Classes, the entire amount will be applied to the purchase
of Fund shares, at the net asset value per share next computed after receipt of
the check or purchase payment by the Transfer Agent. The shares so purchased
will be credited to the investor's account.
    
 
EXCHANGE PRIVILEGE
 
   
    As discussed in the Prospectus, the Fund makes available to its shareholders
an Exchange Privilege whereby shareholders of each Class of shares of the Fund
may exchange their shares for shares of the same Class of shares of any other
Morgan Stanley Dean Witter Multi-Class Fund without the imposition of any
exchange fee. Shares may also be exchanged for shares of any of the following
funds: Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust, Morgan Stanley
Dean Witter Limited Term Municipal Trust, Morgan Stanley Dean Witter Short-Term
Bond Fund and five Morgan Stanley Dean Witter Funds which are money market funds
(the foregoing eight funds are hereinafter referred to as the "Exchange Funds").
Class A shares may also be exchanged for shares of Morgan Stanley Dean Witter
Multi-State Municipal Series Trust and Morgan Stanley Dean Witter Hawaii
Municipal Trust, which are Morgan Stanley Dean Witter Funds sold with a
front-end sales charge ("FSC Funds"). Exchanges may be made after the shares of
the Fund acquired by purchase (not by exchange or dividend reinvestment) have
been held for thirty days. There is no waiting period for exchanges of shares
acquired by exchange or dividend reinvestment. An exchange will be treated for
federal income tax purposes the same as a repurchase or redemption of shares, on
which the shareholder may realize a capital gain or loss.
    
 
    Any new account established through the Exchange Privilege will have the
same registration and cash dividend or dividend reinvestment plan as the present
account, unless the Transfer Agent receives written notification to the
contrary. For telephone exchanges, the exact registration of the existing
account and the account number must be provided.
 
    Any shares held in certificate form cannot be exchanged but must be
forwarded to the Transfer Agent and deposited into the shareholder's account
before being eligible for exchange. (Certificates mailed in for deposit should
not be endorsed.)
 
   
    As described below, and in the Prospectus under the caption "Purchase of
Fund Shares," a CDSC may be imposed upon a redemption, depending on a number of
factors, including the number of years from the time of purchase until the time
of redemption or exchange ("holding period"). When shares of a Morgan Stanley
Dean Witter Multi-Class Fund are exchanged for shares of an Exchange Fund, the
exchange is executed at no charge to the shareholder, without the imposition of
the CDSC at the time of the exchange. During the period of time the shareholder
remains in the Exchange Fund (calculated from the last day of the month in which
the Exchange Fund shares were acquired), the holding period or "year since
purchase payment made" is frozen. When shares are redeemed out of the Exchange
Fund, they will be subject to a CDSC which would be based upon the period of
time the shareholder held shares in a Morgan Stanley Dean Witter Multi-Class
Fund. However, in the case of shares exchanged into an Exchange Fund on or after
April 23, 1990, upon a redemption of shares which results in a CDSC being
imposed, a credit (not to exceed the amount of the CDSC) will be given in an
amount equal to the Exchange Fund 12b-1 distribution fees incurred on or after
that date which are attributable to those shares. Shareholders acquiring shares
of an Exchange Fund pursuant to this exchange privilege may exchange those
shares back into a Morgan Stanley Dean Witter Multi-Class Fund from the Exchange
Fund, with no CDSC being imposed on such exchange. The holding period previously
frozen when
    
 
                                       30
<PAGE>
   
shares were first exchanged for shares of the Exchange Fund resumes on the last
day of the month in which shares of a Morgan Stanley Dean Witter Multi-Class
Fund are reacquired. A CDSC is imposed only upon an ultimate redemption, based
upon the time (calculated as described above) the shareholder was invested in a
Morgan Stanley Dean Witter Multi-Class Fund. In the case of exchanges of Class A
shares which are subject to a CDSC, the holding period also includes the time
(calculated as described above) the shareholder was invested in a FSC Fund.
    
 
   
    When shares initially purchased in a Morgan Stanley Dean Witter Multi-Class
Fund are exchanged for shares of a Morgan Stanley Dean Witter Multi-Class Fund,
shares of a FSC Fund, or shares of an Exchange Fund, the date of purchase of the
shares of the fund exchanged into, for purposes of the CDSC upon redemption,
will be the last day of the month in which the shares being exchanged were
originally purchased. In allocating the purchase payments between funds for
purposes of the CDSC, the amount which represents the current net asset value of
shares at the time of the exchange which were (i) purchased more than one, three
or six years (depending on the CDSC schedule applicable to the shares) prior to
the exchange, (ii) originally acquired through reinvestment of dividends or
distributions and (iii) acquired in exchange for shares of FSC Funds, or for
shares of other Morgan Stanley Dean Witter Funds for which shares of FSC Funds
have been exchanged (all such shares called "Free Shares"), will be exchanged
first. After an exchange, all dividends earned on shares in an Exchange Fund
will be considered Free Shares. If the exchanged amount exceeds the value of
such Free Shares, an exchange is made, on a block-by-block basis, of non-Free
Shares held for the longest period of time (except that, with respect to Class B
shares, if shares held for identical periods of time but subject to different
CDSC schedules are held in the same Exchange Privilege account, the shares of
that block that are subject to a lower CDSC rate will be exchanged prior to the
shares of that block that are subject to a higher CDSC rate). Shares equal to
any appreciation in the value of non-Free Shares exchanged will be treated as
Free Shares, and the amount of the purchase payments for the non-Free Shares of
the fund exchanged into will be equal to the lesser of (a) the purchase payments
for, or (b) the current net asset value of, the exchanged non-Free Shares. If an
exchange between funds would result in exchange of only part of a particular
block of non-Free Shares, then shares equal to any appreciation in the value of
the block (up to the amount of the exchange) will be treated as Free Shares and
exchanged first, and the purchase payment for that block will be allocated on a
pro rata basis between the non-Free Shares of that block to be retained and the
non-Free Shares to be exchanged. The prorated amount of such purchase payment
attributable to the retained non-Free Shares will remain as the purchase payment
for such shares, and the amount of purchase payment for the exchanged non-Free
Shares will be equal to the lesser of (a) the prorated amount of the purchase
payment for, or (b) the current net asset value of, those exchanged non-Free
Shares. Based upon the procedures described in the Prospectus under the caption
"Purchase of Fund Shares," any applicable CDSC will be imposed upon the ultimate
redemption of shares of any fund, regardless of the number of exchanges since
those shares were originally purchased.
    
 
    With respect to the redemption or repurchase of shares of the Fund, the
application of proceeds to the purchase of new shares in the Fund or any other
of the funds and the general administration of the Exchange Privilege, the
Transfer Agent acts as agent for the Distributor and for the shareholder's
selected broker-dealer, if any, in the performance of such functions. With
respect to exchanges, redemptions or repurchases, the Transfer Agent shall be
liable for its own negligence and not for the default or negligence of its
correspondents or for losses in transit. The Fund shall not be liable for any
default or negligence of the Transfer Agent, the Distributor or any selected
broker-dealer.
 
    The Distributor and any selected broker-dealer have authorized and appointed
the Transfer Agent to act as their agent in connection with the application of
proceeds of any redemption of Fund shares to the purchase of shares of any other
fund and the general administration of the Exchange Privilege. No commission or
discounts will be paid to the Distributor or any selected broker-dealer for any
transactions pursuant to this Exchange Privilege.
 
    Exchanges are subject to the minimum investment requirement and any other
conditions imposed by each fund. (The minimum initial investment for the
Exchange Privilege account of each Class is
 
                                       31
<PAGE>
   
$5,000 for Morgan Stanley Dean Witter Liquid Asset Fund Inc., Morgan Stanley
Dean Witter Tax-Free Daily Income Trust, Morgan Stanley Dean Witter California
Tax-Free Daily Income Trust and Morgan Stanley Dean Witter New York Municipal
Money Market Trust, although those funds may, at their discretion, accept
initial investments of as low as $1,000. The minimum initial investment for the
Exchange Privilege account of each Class is $10,000 for Morgan Stanley Dean
Witter Short-Term U.S. Treasury Trust, although that fund, in its discretion,
may accept initial purchases as low as $5,000. The minimum initial investment
for the Exchange Privilege account of each Class is $5,000 for Morgan Stanley
Dean Witter Special Value Fund. The minimum initial investment for the Exchange
Privilege account of each Class for all other Morgan Stanley Dean Witter Funds
for which the Exchange Privilege is available is $1,000.) Upon exchange into an
Exchange Fund, the shares of that fund will be held in a special Exchange
Privilege Account separately from accounts of those shareholders who have
acquired their shares directly from that fund. As a result, certain services
normally available to shareholders of those funds, including the check writing
feature, will not be available for funds held in that account.
    
 
   
    The Fund and each of the other Morgan Stanley Dean Witter Funds may limit
the number of times this Exchange Privilege may be exercised by any investor
within a specified period of time. Also, the Exchange Privilege may be
terminated or revised at any time by the Fund and/or any of the Morgan Stanley
Dean Witter Funds for which shares of the Fund have been exchanged, upon such
notice as may be required by applicable regulatory agencies (presently sixty
days' prior written notice for termination or material revision), provided that
six months' prior written notice of termination will be given to the
shareholders who hold shares of Exchange Funds, pursuant to the Exchange
Privilege, and provided further that the Exchange Privilege may be terminated or
materially revised without notice at times (a) when the New York Stock Exchange
is closed for other than customary weekends and holidays, (b) when trading on
that Exchange is restricted, (c) when an emergency exists as a result of which
disposal by the Fund of securities owned by it is not reasonably practicable or
it is not reasonably practicable for the Fund fairly to determine the value of
its net assets, (d) during any other period when the Securities and Exchange
Commission by order so permits (provided that applicable rules and regulations
of the Securities and Exchange Commission shall govern as to whether the
conditions prescribed in (b) or (c) exist) or (e) if the Fund would be unable to
invest amounts effectively in accordance with its investment objective, policies
and restrictions.
    
 
    The current prospectus for each fund describes its investment objectives and
policies, and shareholders should obtain a copy and examine it carefully before
investing. An exchange will be treated for federal income tax purposes the same
as a repurchase or redemption of shares, on which the shareholder may realize a
capital gain or loss. However, the ability to deduct capital losses on an
exchange may be limited in situations where there is an exchange of shares
within ninety days after the shares are purchased. The Exchange Privilege is
only available in states where an exchange may legally be made.
 
   
    For further information regarding the Exchange Privilege, shareholders
should contact their Morgan Stanley Dean Witter Financial Advisor or other
selected broker-dealer representative or the Transfer Agent.
    
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  As stated in the Prospectus, shares of each Class of the Fund
can be redeemed for cash at any time at the net asset value per share next
determined; however, such redemption proceeds will be reduced by the amount of
any applicable CDSC. If shares are held in shareholder's account without a share
certificate, a written request for redemption to the Fund's Transfer Agent at
P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are held by the
shareholder, the shares may be redeemed by surrendering the certificates with a
written request for redemption. The share certificate, or an accompanying stock
power, and the request for redemption, must be signed by the shareholder or
shareholders exactly as the shares are registered. Each request for redemption,
whether or not accompanied by a share certificate, must be sent to the Fund's
Transfer Agent, which will redeem the shares at their net asset value next
computed (see "Purchase of Fund Shares") after it receives the request, and
 
                                       32
<PAGE>
certificate, if any, in good order. Any redemption request received after such
computation will be redeemed at the next determined net asset value. The term
"good order" means that the share certificate, if any, and request for
redemption are properly signed, accompanied by any documentation required by the
Transfer Agent, and bear signature guarantees when required by the Fund or the
Transfer Agent. If redemption is requested by a corporation, partnership, trust
or fiduciary, the Transfer Agent may require that written evidence of authority
acceptable to the Transfer Agent be submitted before such request is accepted.
 
    Whether certificates are held by the shareholder or shares are held in a
shareholder's account, if the proceeds are to be paid to any person other than
the record owner, or if the proceeds are to be paid to a corporation (other than
the Distributor or a selected broker-dealer for the account of the shareholder),
partnership, trust or fiduciary, or sent to a shareholder at an address other
than the registered address, signatures must be guaranteed by an eligible
guarantor. A stock power may be obtained from any dealer or commercial bank. The
Fund may change the signature guarantee requirements from time to time upon
notice to shareholders, which may be by means of a supplement to the prospectus
or a new prospectus.
 
    REPURCHASE.  As stated in the Prospectus, DWR and other selected
broker-dealers are authorized to repurchase shares represented by a share
certificate which is delivered to any of their offices. Shares held in a
shareholder's account without a share certificate may also be repurchased by DWR
and other selected broker-dealers upon the telephonic request of the
shareholder. The repurchase price is the net asset value next computed after
such purchase order is received by DWR or other selected broker-dealer reduced
by any applicable CDSC.
 
   
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  As discussed in the Prospectus,
payment for shares of any Class presented for repurchase or redemption will be
made by check within seven days after receipt by the Transfer Agent of the
certificate and/or written request in good order. Such payment may be postponed
or the right of redemption suspended at times (a) when the New York Stock
Exchange is closed for other than customary weekends and holidays, (b) when
trading on that Exchange is restricted, (c) when an emergency exists as a result
of which disposal by the Fund of securities owned by it is not reasonably
practicable or it is not reasonably practicable for the Fund fairly to determine
the value of its net assets, or (d) during any other period when the Securities
and Exchange Commission by order so permits; provided that applicable rules and
regulations of the Securities and Exchange Commission shall govern as to whether
the conditions prescribed in (b) or (c) exist. If the shares to be redeemed have
recently been purchased by check (including a certified check or bank cashier's
check), payment of the redemption proceeds may be delayed for the minimum time
needed to verify that the check used for investment has been honored (not more
than fifteen days from the time of receipt of the check by the Transfer Agent).
It has been and remains the Fund's policy and practice that, if checks for
redemption proceeds remain uncashed, no interest will accrue on amounts
represented by such uncashed checks. Shareholders maintaining accounts with DWR
or another selected broker-dealer are referred to their Morgan Stanley Dean
Witter Financial Advisor or other selected broker-dealer representative
regarding restrictions on redemption of shares of the Fund pledged in the margin
account.
    
 
    TRANSFERS OF SHARES.  In the event a shareholder requests a transfer of any
shares to a new registration, such shares will be transferred without sales
charge at the time of transfer. With regard to the status of shares which are
either subject to the CDSC or free of such charge (and with regard to the length
of time shares subject to the charge have been held), any transfer involving
less than all of the shares in an account will be made on a pro rata basis (that
is, by transferring shares in the same proportion that the transferred shares
bear to the total shares in the account immediately prior to the transfer). The
transferred shares will continue to be subject to any applicable CDSC as if they
had not been so transferred.
 
    REINSTATEMENT PRIVILEGE.  As discussed in the Prospectus, a shareholder who
has had his or her shares redeemed or repurchased and has not previously
exercised this reinstatement privilege may
 
                                       33
<PAGE>
within 35 days after the date of redemption or repurchase reinstate any portion
or all of the proceeds of such redemption or repurchase in shares of the Fund in
the same Class at the net asset value next determined after a reinstatement
request, together with such proceeds, is received by the Transfer Agent.
 
    Exercise of the reinstatement privilege will not affect the federal income
tax treatment of any gain or loss realized upon the redemption or repurchase,
except that if the redemption or repurchase resulted in a loss and reinstatement
is made in shares of the Fund, some or all of the loss, depending on the amount
reinstated, will not be allowed as a deduction for federal income tax purposes,
but will be applied to adjust the cost basis of the shares acquired upon
reinstatement.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
   
    As discussed in the Prospectus, the Fund will determine either to distribute
or to retain all or part of any net long-term capital gains in any year for
reinvestment. If any such gains are retained, the Fund will pay federal income
tax thereon, and will notify shareholders that, following an election by the
Fund, the shareholders will be required to include such undistributed gains in
determining their taxable income and may claim their share of the tax paid by
the Fund as a credit against their individual federal income tax.
    
 
    In computing net investment income, the Fund will not amortize premiums or
accrue discounts on fixed-income securities in the portfolio, except those
original issue discounts for which amortization is required for federal income
tax purposes. Additionally, with respect to market discounts on bonds issued
after July 18, 1984, and all bonds purchased after April 30, 1993, a portion of
any capital gain realized upon disposition may be re-characterized as taxable
ordinary income in accordance with the provisions of the Internal Revenue Code.
Realized gains and losses on security transactions are determined on the
identified cost method.
 
   
    Gains or losses on sales of securities by the Fund will be long-term capital
gains or losses if the securities have been held by the Fund for more than
twelve months. Gains or losses on the sale of securities held for twelve months
or less will be short-term gains or losses.
    
 
    Because the Fund intends to distribute all of its net investment income and
capital gains to shareholders and otherwise continue to qualify as a regulated
investment company under Subchapter M of the Internal Revenue Code, it is not
expected that the Fund will be required to pay any federal income tax.
Shareholders will normally have to pay federal income taxes, and any state
income taxes, on the dividends and distributions they receive from the Fund.
Such dividends and distributions, to the extent that they are derived from net
investment income or short-term capital gains, are taxable to the shareholder as
ordinary income regardless of whether the shareholder receives such payments in
additional shares or in cash. Any dividends declared in the last quarter of any
year to shareholders of record of such period which are paid in the following
calendar year prior to February 1 will be deemed received by the shareholder in
the prior calendar year.
 
   
    Any dividend or capital gains distribution received by a shareholder from
any regulated investment company will have the effect of reducing the net asset
value of the shareholder's stock in that company by the exact amount of the
dividend or capital gains distribution. Furthermore, capital gains distributions
and dividends are subject to federal income taxes. If the net asset value of the
shares should be reduced below a shareholder's cost as a result of the payment
of dividends or realized net long-term capital gains, such payment would be in
part a return of the shareholder's investment to the extent of such reduction
below the shareholder's cost, but nonetheless would be fully taxable. Therefore,
an investor should consider the tax implications of purchasing Fund shares
immediately prior to a distribution record date.
    
 
   
    Distributions of net long-term capital gains, if any, are taxable to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional shares or in cash. The Taxpayer Relief Act reduces the maximum tax
    
 
                                       34
<PAGE>
   
on long-term capital gains from 28% to 20%. The lower rates do not apply to
collectibles and certain other assets. Additionally, the maximum capital gain
rate for assets that are held more than 5 years and that are acquired after
December 31, 2000 is 18%.
    
 
    Dividend payments will be eligible for the federal dividends received
deduction available to the Fund's corporate shareholders only to the extent the
aggregate dividends received by the Fund would be eligible for the deduction if
the Fund were the shareholder claiming the dividends received deduction. The
amount of dividends paid by the Fund which may qualify for the dividends
received deduction is limited to the aggregate amount of qualifying dividends
which the Fund derives from its portfolio investments which the Fund has held
for a minimum period, usually 46 days within a 90 day period beginning 45 days
before the ex-dividend date of each qualifying dividend. Shareholders must meet
a similar holding period requirement with respect to their shares to claim the
dividends received deduction with respect to any distribution of qualifying
dividends. Any long-term and mid-term capital gain distributions will also not
be eligible for the dividends received deduction. The ability to take the
dividends received deduction will also be limited in the case of a Fund
shareholder which incurs or continues indebtedness which is directly
attributable to its investment in the Fund.
 
   
    After the end of the calendar year, shareholders will be sent full
information on their dividends and capital gains distributions for tax purposes,
including information as to the portion taxable as ordinary income, the portion
taxable as long-term capital gains and the portion eligible for the dividends
received deduction. To avoid being subject to a 31% federal backup withholding
tax on taxable dividends, capital gains distributions and the proceeds of
redemptions and repurchases, shareholders' taxpayer identification numbers must
be furnished and certified as to their accuracy.
    
 
   
    Shareholders are urged to consult their attorneys or tax advisors regarding
specific questions as to federal, state or local taxes.
    
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
   
    As discussed in the Prospectus, from time to time the Fund may quote its
"yield" and/or its "total return" in advertisements and sales literature. These
figures are computed separately for Class A, Class B, Class C and Class D
shares. Yield is calculated for any 30-day period as follows: the amount of
interest income for each security in the Fund's portfolio is determined in
accordance with regulatory requirements; the total for the entire portfolio
constitutes the Fund's gross income for the period. Expenses accrued during the
period are subtracted to arrive at "net investment income" of each Class. The
resulting amount is divided by the product of the maximum offering price per
share on the last day of the period multiplied by the average number of shares
of the applicable Class outstanding during the period that were entitled to
dividends. This amount is added to 1 and raised to the sixth power. 1 is then
subtracted from the result and the difference is multiplied by 2 to arrive at
the annualized yield. The yields for the 30-day period ended August 31, 1998,
calculated pursuant to this formula, were 4.96% for Class A, 4.58% for Class B,
4.57% for Class C and 5.44% for Class D.
    
 
   
    The Fund's "average annual total return" represents an annualization of the
Fund's total return over a particular period and is computed by finding the
annual percentage rate which will result in the ending redeemable value of a
hypothetical $1,000 investment made at the beginning of a one, five or ten year
period, or for the period from the date of commencement of the Fund's
operations, if shorter than any of the foregoing. The ending redeemable value is
reduced by any CDSC at the end of the one, five or ten year or other period. For
the purpose of this calculation, it is assumed that all dividends and
distributions are reinvested. The formula for computing the average annual total
return involves a percentage obtained by dividing the ending redeemable value by
the amount of the initial investment, taking a root of the quotient (where the
root is equivalent to the number of years in the period) and subtracting 1 from
the result. The average annual total returns of Class B for the fiscal year
ended August 31, 1998, the five year period ended August 31, 1998 and for the
period from May 3, 1989 (commencement of operations) through August 31, 1998
were 1.53%, 4.43% and 6.54%, respectively. The average annual total returns of
Class A for the fiscal year ended August 31, 1998 and for the period July 28,
1997 (inception of the
    
 
                                       35
<PAGE>
   
Class) through August 31, 1998 were 2.74% and 2.07%, respectively. The average
annual total returns of Class C for the fiscal year ended August 31, 1998 and
for the period July 28, 1997 (inception of the Class) through August 31, 1998
were 5.39% and 5.53%, respectively. The average annual total returns of Class D
for the fiscal year ended August 31, 1998 and for the period July 28, 1997
(inception of the Class) through August 31, 1998 were 7.43% and 6.35%,
respectively.
    
 
   
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average,
year-by-year or other types of total return figures. Such calculations may or
may not reflect the imposition of the maximum front-end sales charge for Class A
or the deduction of the CDSC for each of Class B and Class C which, if
reflected, would reduce the performance quoted. For example, the average annual
total returns of the Fund may be calculated in the manner described above, but
without deduction for any applicable sales charge. Based on this calculation,
the average annual total returns for Class B for the fiscal year ended August
31, 1998, the five year period ended August 31, 1998 and for the period from May
3, 1989 through August 31, 1998 were 6.53%, 4.75% and 6.54%, respectively. Based
on this calculation, the average annual total returns of Class A for the fiscal
year ended August 31, 1998 and for the period July 28, 1997 through August 31,
1998 were 7.30% and 6.21%, respectively, the average annual total returns of
Class C for the fiscal year ended August 31, 1998 and for the period July 28,
1997 through August 31, 1998 were 6.39% and 5.53%, respectively, and the average
annual total returns of Class D for the fiscal year ended August 31, 1998 and
for the period July 28, 1997 through August 31, 1998 were 7.43% and 6.35%,
respectively.
    
 
   
    In addition, the Fund may compute its aggregate total return for each Class
for specified periods by determining the aggregate percentage rate which will
result in the ending value of a hypothetical $1,000 investment made at the
beginning of the period. For the purpose of this calculation, it is assumed that
all dividends and distributions are reinvested. The formula for computing
aggregate total return involves a percentage obtained by dividing the ending
value (without reduction for any sales charge) by the initial $1,000 investment
and subtracting 1 from the result. Based on the foregoing calculation, the total
returns for Class B for the fiscal year ended August 31, 1998 was 6.53% and the
total return for the five year period ended August 31, 1998 and for the period
from May 3, 1989 through August 31, 1998 were 26.11% and 80.56%, respectively.
Based on the foregoing calculations, the total returns for Class A for the
fiscal year ended August 31, 1998 and for the period July 28, 1997 through
August 31, 1998 were 7.30% and 6.80%, respectively, the total returns of Class C
for the fiscal year ended August 31, 1998 and for the period July 28, 1997
through August 31, 1998 were 6.39% and 6.05%, respectively, and the total
returns of Class D for the fiscal year ended August 31, 1998 and for the period
July 28, 1997 through August 31, 1998 were 7.43% and 6.95%, respectively.
    
 
   
    The Fund may also advertise the growth of hypothetical investments of
$10,000, $50,000 and $100,000 in each Class of shares of the Fund by adding 1 to
the Fund's aggregate total return to date (expressed as a decimal and without
taking into account the effect of any applicable CDSC) and multiplying by
$9,575, $48,250 and $97,250 in the case of Class A (investments of $10,000,
$50,000 and $100,000 adjusted for the initial sales charge) or by $10,000,
$50,000 and $100,000 in the case of each of Class B, Class C and Class D, as the
case may be. Investments of $10,000, $50,000 and $100,000 in each Class at
inception of the Class would have grown to the following amounts at August 31,
1998:
    
 
   
<TABLE>
<CAPTION>
                           INVESTMENT AT INCEPTION OF:
            INCEPTION   ---------------------------------
  CLASS       DATE:      $10,000    $50,000    $100,000
- ---------  -----------  ---------  ---------  -----------
<S>        <C>          <C>        <C>        <C>
Class A       7/28/97   $  10,226  $  51,531  $   103,863
Class B        5/3/89      18,056     90,280      180,560
Class C       7/28/97      10,605     53,025      106,050
Class D       7/28/97      10,695     53,475      106,950
</TABLE>
    
 
    The Fund from time to time may also advertise its performance relative to
certain performance rankings and indices compiled by independent organizations.
 
                                       36
<PAGE>
DESCRIPTION OF SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the shareholders of the Fund are entitled to
a full vote for each full share held. All of the Trustees have been elected by
the shareholders of the Fund, most recently at a Special Meeting of Shareholders
on May 21, 1997. The Trustees themselves have the power to alter the number and
the terms of office of the Trustees, and they may at any time lengthen their own
terms or make their terms of unlimited duration and appoint their own
successors, provided that always at least a majority of the Trustees has been
elected by the shareholders of the Fund. Under certain circumstances the
Trustees may be removed by action of the Trustees. The shareholders also have
the right under certain circumstances to remove the Trustees. The voting rights
of shareholders are not cumulative, so that holders of more than 50 percent of
the shares voting can, if they choose, elect all Trustees being selected, while
the holders of the remaining shares would be unable to elect any Trustees.
 
    The Fund is not required to hold Annual Meetings of Shareholders and in
ordinary circumstances the Fund does not intend to hold such meetings. The
Trustees may call Special Meetings of Shareholders for action by shareholder
vote as may be required by the Act or the Declaration of Trust.
 
    The Declaration of Trust permits the Trustees to authorize the creation of
additional series of shares (the proceeds of which would be invested in
separate, independently managed portfolios) and additional classes of shares
within any series. The Trustees have not authorized any such additional series
or classes of shares other than as set forth in the Prospectus.
 
    Under Massachusetts law, shareholders of a business trust may, under certain
limited circumstances, be held personally liable as partners for obligations of
the Fund. However, the Declaration of Trust contains an express disclaimer of
shareholder liability for acts or obligations of the Fund, requires that Fund
obligations include such disclaimer, and provides for indemnification and
reimbursement of expenses out of the Fund's property for any shareholder held
personally liable for the obligations of the Fund. Thus, the risk of a
shareholder incurring financial loss on account of shareholder liability is
limited to circumstances in which the Fund itself would be unable to meet its
obligations. Given the above limitations on shareholder personal liability, and
the nature of the Fund's assets and operations, in the opinion of Massachusetts
counsel to the Fund, the risk to shareholders of personal liability is remote.
 
    The Declaration of Trust further provides that no Trustee, officer, employee
or agent of the Fund is liable to the Fund or to a shareholder, nor is any
Trustee, officer, employee or agent liable to any third persons in connection
with the affairs of the Fund, except as such liability may arise from his/her or
its own bad faith, willful misfeasance, gross negligence, or reckless disregard
of his/her or its duties. It also provides that all third persons shall look
solely to the Fund's property for satisfaction of claims arising in connection
with the affairs of the Fund. With the exceptions stated, the Declaration of
Trust provides that a Trustee, officer, employee or agent is entitled to be
indemnified against all liability in connection with the affairs of the Fund.
 
    The Fund is authorized to issue an unlimited number of shares of beneficial
interest. The Fund shall be of unlimited duration subject to the provisions in
the Declaration of Trust concerning termination by action of the shareholders.
 
CUSTODIAN AND TRANSFER AGENT
- --------------------------------------------------------------------------------
 
    The Bank of New York, 90 Washington Street, New York, New York 10286 is the
Custodian of the Fund's assets. Any of the Fund's cash balances with the
Custodian in excess of $100,000 are unprotected by federal deposit insurance.
Such balances may, at times, be substantial.
 
   
    Morgan Stanley Dean Witter Trust FSB ("MSDW Trust"), Harborside Financial
Center, Plaza Two, Jersey City, New Jersey 07311 is the Transfer Agent of the
Fund's shares and Dividend Disbursing Agent for payment of dividends and
distributions on Fund shares and Agent for shareholders under various investment
plans described herein. MSDW Trust is an affiliate of Morgan Stanley Dean Witter
Advisors Inc., the Fund's Investment Manager, and of Morgan Stanley Dean Witter
Distributors Inc., the Fund's
    
 
                                       37
<PAGE>
   
Distributor. As Transfer Agent and Dividend Disbursing Agent, MSDW Trust's
responsibilities include maintaining shareholder accounts, disbursing cash
dividends and reinvesting dividends, processing account registration changes,
handling purchase and redemption transactions, mailing prospectuses and reports,
mailing and tabulating proxies, processing share certificate transactions, and
maintaining shareholder records and lists. For these services MSDW Trust
receives a per shareholder account fee from the Fund.
    
 
INDEPENDENT ACCOUNTANTS
- --------------------------------------------------------------------------------
 
   
    PricewaterhouseCoopers LLP serves as the independent accountants of the
Fund. The independent accountants are responsible for auditing the annual
financial statements of the Fund.
    
 
REPORTS TO SHAREHOLDERS
- --------------------------------------------------------------------------------
 
    The Fund will send to shareholders, at least semi-annually, reports showing
the Fund's portfolio and other information. An annual report containing
financial statements, together with a report of its independent accountants,
will be sent to shareholders each year.
 
    The Fund's fiscal year ends on August 31. The financial statements of the
Fund must be audited at least once a year by independent accountants whose
selection is made annually by the Fund's Board of Trustees.
 
LEGAL COUNSEL
- --------------------------------------------------------------------------------
 
    Barry Fink, Esq., who is an officer and the General Counsel of the
Investment Manager, is an officer and the General Counsel of the Fund.
 
EXPERTS
- --------------------------------------------------------------------------------
 
   
    The annual financial statements of the Fund for the fiscal year ended August
31, 1998, which are included in this Statement of Additional Information and
incorporated by reference in the Prospectus, have been so included and
incorporated in reliance on the report of PricewaterhouseCoopers LLP,
independent accountants, given on the authority of said firm as experts in
auditing and accounting.
    
 
REGISTRATION STATEMENT
- --------------------------------------------------------------------------------
 
    This Statement of Additional Information and the Prospectus do not contain
all of the information set forth in the Registration Statement the Fund has
filed with the Securities and Exchange Commission. The complete Registration
Statement may be obtained from the Securities and Exchange Commission upon
payment of the fee prescribed by the rules and regulations of the Commission.
 
                                       38
<PAGE>
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
PORTFOLIO OF INVESTMENTS AUGUST 31, 1998
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                                                                   COUPON   MATURITY
THOUSANDS                                                                                    RATE      DATE       VALUE
- ---------------------------------------------------------------------------------------------------------------------------
<C>        <S>                                                                              <C>      <C>       <C>
           CORPORATE BONDS (81.2%)
           AEROSPACE (1.8%)
$  2,850   Raytheon Co....................................................................   6.30%   08/15/00  $  2,877,104
                                                                                                               ------------
           AUTOMOBILE - RENTALS (2.0%)
   3,250   Hertz Corp. ...................................................................   6.00    01/15/03     3,264,885
                                                                                                               ------------
           AUTOMOTIVE - FINANCE (3.2%)
   4,975   General Motors Acceptance Corp. ...............................................   8.40    10/15/99     5,120,320
                                                                                                               ------------
           BANK HOLDING COMPANIES (3.2%)
   4,975   Star Bank N.A. ................................................................   6.375   03/01/04     5,077,037
                                                                                                               ------------
           CABLE & TELECOMMUNICATIONS (2.6%)
   4,000   Time Warner Entertainment......................................................   7.25    09/01/08     4,164,840
                                                                                                               ------------
           CASINO/GAMBLING (1.8%)
   2,900   Mirage Resorts, Inc............................................................   6.75    02/01/08     2,823,556
                                                                                                               ------------
           CELLULAR TELEPHONE (0.8%)
   1,260   AirTouch Communications, Inc. .................................................   7.125   07/15/01     1,312,366
                                                                                                               ------------
           COMPUTER SOFTWARE (1.2%)
   1,900   Oracle Corp. ..................................................................   6.91    02/15/07     1,963,346
                                                                                                               ------------
           DISCOUNT CHAINS (1.9%)
   3,000   TJX Companies, Inc.............................................................   6.625   06/15/00     3,011,550
                                                                                                               ------------
           FINANCE & BROKERAGE (6.3%)
   2,500   Donaldson Lufkin & Jenrette Inc................................................   6.11    05/15/01     2,517,175
   1,500   Merrill Lynch & Co., Inc. .....................................................   6.00    01/15/01     1,509,480
   3,200   Salomon, Inc...................................................................   6.50    03/01/00     3,238,272
   3,000   Salomon Smith Barney Holdings..................................................   6.25    06/15/05     3,024,840
                                                                                                               ------------
                                                                                                                 10,289,767
                                                                                                               ------------
           FINANCE COMPANIES (1.2%)
   2,000   Ikon Capital Inc. .............................................................   6.73    06/15/01     1,987,240
                                                                                                               ------------
           FOREIGN GOVERNMENT (1.6%)
   2,450   Israel (State of)..............................................................   6.375   12/15/05     2,519,360
                                                                                                               ------------
           FUNERAL SERVICES (1.9%)
   3,000   Stewart Enterprises, Inc.......................................................   6.70    12/01/03     3,044,550
                                                                                                               ------------
           INDUSTRIAL MACHINERY (2.0%)
   3,000   Atlas Copco (Sweden) - 144A*...................................................   6.50    04/01/08     3,143,940
                                                                                                               ------------
           MAJOR BANKS (12.8%)
   3,900   Bank One Texas N.A.............................................................   6.25    02/15/08     3,908,619
   2,500   Bankers Trust Corp.............................................................   6.70    10/01/07     2,535,725
   3,000   Banque Nationale De Paris (France).............................................   7.20    01/15/07     3,135,900
   5,045   Shawmut Bank Connecticut, N.A..................................................   8.625   02/15/05     5,777,130
   5,000   Societe Generale N.A. Inc. (France) ...........................................   7.40    06/01/06     5,273,400
                                                                                                               ------------
                                                                                                                 20,630,774
                                                                                                               ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       39
<PAGE>
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
PORTFOLIO OF INVESTMENTS AUGUST 31, 1998, CONTINUED
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                                                                   COUPON   MATURITY
THOUSANDS                                                                                    RATE      DATE       VALUE
- ---------------------------------------------------------------------------------------------------------------------------
<C>        <S>                                                                              <C>      <C>       <C>
           MAJOR U.S. TELECOMMUNICATIONS (3.3%)
$  2,000   US West Capital Funding Inc. ..................................................   6.375%  07/15/08  $  2,005,020
   3,000   WorldCom, Inc. ................................................................   7.75    04/01/07     3,254,010
                                                                                                               ------------
                                                                                                                  5,259,030
                                                                                                               ------------
           MEDIA CONGLOMERATES (1.2%)
   2,000   News American Holdings, Inc. ..................................................   6.625   01/09/08     1,960,300
                                                                                                               ------------
           MID-SIZED BANK (1.9%)
   3,000   Capital One Bank...............................................................   6.375   02/15/03     3,057,510
                                                                                                               ------------
           NATURAL GAS - DISTRIBUTION (1.3%)
   2,000   Columbia Energy Group (Series A)...............................................   6.39    11/28/00     2,036,460
                                                                                                               ------------
           NON-U.S. UTILITIES (4.3%)
   2,000   Israel Electric Co., Ltd. - 144A*..............................................   7.125   07/15/05     2,012,780
   5,000   United Utilities Corp. (United Kingdom)........................................   6.45    04/01/08     4,923,300
                                                                                                               ------------
                                                                                                                  6,936,080
                                                                                                               ------------
           OIL INTEGRATED - INTERNATIONAL (3.1%)
   5,000   Societe Nationale Elf Aquitaine (France).......................................   7.75    05/01/99     5,067,200
                                                                                                               ------------
           OIL PRODUCTION - DOMESTIC (1.2%)
   2,000   Union Pacific Resource Group...................................................   6.50    05/15/05     1,930,200
                                                                                                               ------------
           PAPER & FOREST PRODUCTS (3.1%)
   4,949   Noranda Forest, Inc. (Canada)..................................................   6.875   11/15/05     4,917,029
                                                                                                               ------------
           PROPERTY/CASUALTY INSURANCE (3.2%)
   5,037   Nac Re Corp....................................................................   8.00    06/15/99     5,127,162
                                                                                                               ------------
           SEMICONDUCTOR EQUIPMENT (2.8%)
   4,500   Applied Materials, Inc.........................................................   6.75    10/15/07     4,564,260
                                                                                                               ------------
           SPECIALTY CHEMICALS (2.3%)
   2,000   Lyondell Petrochemical Co......................................................   6.50    02/15/06     1,840,420
   2,000   Millennium America, Inc........................................................   7.00    11/15/06     2,001,180
                                                                                                               ------------
                                                                                                                  3,841,600
                                                                                                               ------------
           STEEL (1.6%)
   4,000   Pohang Iron & Steel Co. (South Korea)..........................................   7.125   11/01/06     2,518,320
                                                                                                               ------------
           TEXTILES (1.9%)
   2,975   Burlington Industries, Inc.....................................................   7.25    09/15/05     3,105,781
                                                                                                               ------------
           UTILITIES - ELECTRIC (5.7%)
   2,000   Commonwealth Edison Co. .......................................................   7.50    01/01/01     2,015,320
   1,000   Niagara Mohawk Power Corp......................................................   7.25    10/01/02       998,480
   3,000   System Energy Resources, Inc. .................................................   7.71    08/01/01     3,139,410
   3,000   Western Resources, Inc. .......................................................   6.875   08/01/04     3,103,350
                                                                                                               ------------
                                                                                                                  9,256,560
                                                                                                               ------------
 
           TOTAL CORPORATE BONDS
           (IDENTIFIED COST $130,430,368)....................................................................   130,808,127
                                                                                                               ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       40
<PAGE>
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
PORTFOLIO OF INVESTMENTS AUGUST 31, 1998, CONTINUED
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                                                                   COUPON   MATURITY
THOUSANDS                                                                                    RATE      DATE       VALUE
- ---------------------------------------------------------------------------------------------------------------------------
<C>        <S>                                                                              <C>      <C>       <C>
           U.S. GOVERNMENT & AGENCY OBLIGATIONS (12.1%)
$  2,000   Federal Home Loan Banks........................................................   5.80%   09/02/08  $  2,033,440
      85   Federal Home Loan Mortgage Corp. ..............................................   8.50    12/01/01        86,053
      60   Federal Home Loan Mortgage Corp. ..............................................   8.50    01/01/02        61,100
     193   Federal Home Loan Mortgage Corp. ..............................................   8.50    07/01/02       196,758
      99   Federal Home Loan Mortgage Corp. ..............................................   9.00    08/01/02       101,671
   1,000   Federal National Mortgage Assoc. ..............................................   6.00    12/15/00     1,000,750
   2,000   Federal National Mortgage Assoc. ..............................................   5.95    03/09/01     2,007,540
   1,450   Federal National Mortgage Assoc. ..............................................   5.90    06/18/01     1,480,856
      32   Federal National Mortgage Assoc. ..............................................   8.50    12/01/01        33,033
   2,000   Federal National Mortgage Assoc. ..............................................   7.55    06/10/04     2,031,700
   2,000   Federal National Mortgage Assoc. ..............................................   7.73    08/26/04     2,044,180
   2,160   Private Export Funding Corp....................................................   6.86    04/30/04     2,269,037
   2,000   U.S. Treasury Note.............................................................   6.25    03/31/99     2,013,080
   3,000   U.S. Treasury Note.............................................................   6.375   05/15/00     3,070,020
   1,000   U.S. Treasury Note.............................................................   6.875   05/15/06     1,112,520
                                                                                                               ------------
 
           TOTAL U.S. GOVERNMENT & AGENCY OBLIGATIONS
           (IDENTIFIED COST $19,014,420).....................................................................    19,541,738
                                                                                                               ------------
 
           SHORT-TERM INVESTMENT (a) (7.8%)
           U.S. GOVERNMENT AGENCY
  12,500   Federal Home Loan Mortgage Corp.
             (IDENTIFIED COST $12,500,000)................................................   5.70    09/01/98    12,500,000
                                                                                                               ------------
           TOTAL INVESTMENTS
           (IDENTIFIED COST $161,944,788) (B).....................................................   101.1%     162,849,865
 
           LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS.........................................    (1.1)      (1,694,605)
                                                                                                    -------   -------------
 
           NET ASSETS.............................................................................   100.0%   $ 161,155,260
                                                                                                    -------   -------------
                                                                                                    -------   -------------
</TABLE>
 
- ---------------------
 
 *   Resale is restricted to qualified institutional investors.
(a)  Security was purchased on a discount basis. The interest rate shown has
     been adjusted to reflect a money market equivalent yield.
(b)  The aggregate cost for federal income tax purposes approximates identified
     cost. The aggregate gross unrealized appreciation is $3,256,500 and the
     aggregate gross unrealized depreciation is $2,351,423, resulting in net
     unrealized appreciation of $905,077.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       41
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
FINANCIAL STATEMENTS
    
 
   
STATEMENT OF ASSETS AND LIABILITIES
    
   
AUGUST 31, 1998
    
 
   
<TABLE>
<S>                                                                                             <C>
ASSETS:
Investments in securities, at value (identified cost $161,944,788)............................  $162,849,865
Cash..........................................................................................        42,242
Receivable for:
    Interest..................................................................................     2,614,273
    Shares of beneficial interest sold........................................................       153,538
    Principal paydowns........................................................................        14,050
Prepaid expenses and other assets.............................................................        49,489
                                                                                                ------------
     TOTAL ASSETS.............................................................................   165,723,457
                                                                                                ------------
LIABILITIES:
Payable for:
    Investments purchased.....................................................................     3,515,090
    Shares of beneficial interest repurchased.................................................       679,398
    Plan of distribution fee..................................................................       107,419
    Dividends and distributions to shareholders...............................................        87,548
    Investment management fee.................................................................        80,172
Accrued expenses and other payables...........................................................        98,570
                                                                                                ------------
     TOTAL LIABILITIES........................................................................     4,568,197
                                                                                                ------------
     NET ASSETS...............................................................................  $161,155,260
                                                                                                ------------
                                                                                                ------------
COMPOSITION OF NET ASSETS:
Paid-in-capital...............................................................................  $169,681,311
Net unrealized appreciation...................................................................       905,077
Accumulated undistributed net investment income...............................................        15,315
Accumulated net realized loss.................................................................    (9,446,443)
                                                                                                ------------
     NET ASSETS...............................................................................  $161,155,260
                                                                                                ------------
                                                                                                ------------
CLASS A SHARES:
Net Assets....................................................................................    $3,456,826
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................       356,015
     NET ASSET VALUE PER SHARE................................................................         $9.71
                                                                                                ------------
                                                                                                ------------
     MAXIMUM OFFERING PRICE PER SHARE,
       (NET ASSET VALUE PLUS 4.44% OF NET
      ASSET VALUE)............................................................................        $10.14
                                                                                                ------------
                                                                                                ------------
CLASS B SHARES:
Net Assets....................................................................................  $151,515,225
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................    15,613,607
     NET ASSET VALUE PER SHARE................................................................         $9.70
                                                                                                ------------
                                                                                                ------------
CLASS C SHARES:
Net Assets....................................................................................      $457,016
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................        47,087
     NET ASSET VALUE PER SHARE................................................................         $9.71
                                                                                                ------------
                                                                                                ------------
CLASS D SHARES:
Net Assets....................................................................................    $5,726,193
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................       590,213
     NET ASSET VALUE PER SHARE................................................................         $9.70
                                                                                                ------------
                                                                                                ------------
</TABLE>
    
 
   
STATEMENT OF OPERATIONS
    
   
FOR THE YEAR ENDED AUGUST 31, 1998
    
 
   
<TABLE>
<S>                                                                                              <C>
NET INVESTMENT INCOME:
 
INTEREST INCOME................................................................................  $11,087,299
                                                                                                 -----------
 
EXPENSES
Plan of distribution fee (Class A shares)......................................................        4,202
Plan of distribution fee (Class B shares)......................................................    1,300,714
Plan of distribution fee (Class C shares)......................................................        1,925
Investment management fee......................................................................      964,411
Transfer agent fees and expenses...............................................................      166,274
Registration fees..............................................................................       96,385
Shareholder reports and notices................................................................       58,323
Professional fees..............................................................................       45,394
Trustees' fees and expenses....................................................................       21,090
Custodian fees.................................................................................       19,216
Other..........................................................................................        6,257
                                                                                                 -----------
 
     TOTAL EXPENSES............................................................................    2,684,191
                                                                                                 -----------
 
     NET INVESTMENT INCOME.....................................................................    8,403,108
                                                                                                 -----------
 
NET REALIZED AND UNREALIZED GAIN:
Net realized gain..............................................................................    1,768,354
Net change in unrealized appreciation..........................................................      134,510
                                                                                                 -----------
 
     NET GAIN..................................................................................    1,902,864
                                                                                                 -----------
 
NET INCREASE...................................................................................  $10,305,972
                                                                                                 -----------
                                                                                                 -----------
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       42
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
FINANCIAL STATEMENTS, CONTINUED
    
 
   
STATEMENT OF CHANGES IN NET ASSETS
    
 
   
<TABLE>
<CAPTION>
                                                                            FOR THE YEAR      FOR THE YEAR
                                                                                ENDED            ENDED
                                                                           AUGUST 31, 1998  AUGUST 31, 1997*
- ------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>              <C>
 
INCREASE (DECREASE) IN NET ASSETS:
 
OPERATIONS:
Net investment income....................................................  $     8,403,108  $     10,272,537
Net realized gain (loss).................................................        1,768,354        (2,567,762)
Net change in unrealized appreciation/depreciation.......................          134,510         6,828,218
                                                                           ---------------  ----------------
 
     NET INCREASE........................................................       10,305,972        14,532,993
                                                                           ---------------  ----------------
 
DIVIDENDS TO SHAREHOLDERS FROM NET INVESTMENT INCOME:
Class A shares...........................................................         (100,388)              (58)
Class B shares...........................................................       (7,980,246)      (10,229,881)
Class C shares...........................................................          (11,414)              (83)
Class D shares...........................................................         (348,107)          (25,048)
                                                                           ---------------  ----------------
 
     TOTAL DIVIDENDS.....................................................       (8,440,155)      (10,255,070)
                                                                           ---------------  ----------------
Net decrease from transactions in shares of beneficial interest..........      (10,443,102)      (43,456,259)
                                                                           ---------------  ----------------
 
     NET DECREASE........................................................       (8,577,285)      (39,178,336)
 
NET ASSETS:
Beginning of period......................................................      169,732,545       208,910,881
                                                                           ---------------  ----------------
 
     END OF PERIOD
    (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF $15,315 AND
    $52,362, RESPECTIVELY)...............................................  $   161,155,260  $    169,732,545
                                                                           ---------------  ----------------
                                                                           ---------------  ----------------
</TABLE>
    
 
- ---------------------
 
   
 *   Class A, Class C and Class D shares were issued July 28, 1997.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
    
                                       43
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1998
    
 
   
1. ORGANIZATION AND ACCOUNTING POLICIES
    
 
   
Morgan Stanley Dean Witter Intermediate Income Securities (the "Fund"), formerly
Dean Witter Intermediate Income Securities, is registered under the Investment
Company Act of 1940, as amended (the "Act"), as a diversified, open-end
management investment company. The Fund's investment objective is high current
income consistent with safety of principal. The Fund was organized as a
Massachusetts business trust on September 1, 1988 and commenced operations on
May 3, 1989. On July 28, 1997, the Fund commenced offering three additional
classes of shares, with the then current shares, other than shares held by
certain employee benefit plans established by Dean Witter Reynolds Inc. and its
affiliate, SPS Transaction Services, Inc., designated as Class B shares. Shares
held by those employee benefit plans prior to July 28, 1997 have been designated
Class D shares.
    
 
   
The Fund offers Class A shares, Class B shares, Class C shares and Class D
shares. The four classes are substantially the same except that most Class A
shares are subject to a sales charge imposed at the time of purchase and some
Class A shares, and most Class B shares and Class C shares are subject to a
contingent deferred sales charge imposed on shares redeemed within one year, six
years and one year, respectively. Class D shares are not subject to a sales
charge. Additionally, Class A shares, Class B shares and Class C shares incur
distribution expenses.
    
 
   
The preparation of financial statements in accordance with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts and disclosures. Actual results could differ from
those estimates.
    
 
   
The following is a summary of significant accounting policies:
    
 
   
A. VALUATION OF INVESTMENTS -- (1) an equity security listed or traded on the
New York, American or other domestic or foreign stock exchange is valued at its
latest sale price on that exchange prior to the time when assets are valued; if
there were no sales that day, the security is valued at the latest bid price;
(2) all other portfolio securities for which over-the-counter market quotations
are readily available are valued at the latest available bid price; (3) when
market quotations are not readily available, including circumstances under which
it is determined by Morgan Stanley Dean Witter Advisors Inc. (the "Investment
Manager"), formerly Dean Witter InterCapital Inc., that sale and bid prices are
not reflective of a security's market value, portfolio securities are valued at
their fair value as determined in good faith under procedures established by and
under the general supervision of the Trustees (valuation of debt securities for
which market quotations are not readily available may
    
 
                                       44
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1998, CONTINUED
    
 
   
be based upon current market prices of securities which are comparable in
coupon, rating and maturity or an appropriate matrix utilizing similar factors);
(4) certain portfolio securities may be valued by an outside pricing service
approved by the Trustees. The pricing service may utilize a matrix system
incorporating security quality, maturity and coupon as the evaluation model
parameters, and/or research and evaluations by its staff, including review of
broker-dealer market price quotations, in determining what it believes is the
fair valuation of the portfolio securities valued by such pricing service; and
(5) short-term debt securities having a maturity date of more than sixty days at
time of purchase are valued on a mark-to-market basis until sixty days prior to
maturity and thereafter at amortized cost based on their value on the 61st day.
Short-term debt securities having a maturity date of sixty days or less at the
time of purchase are valued at amortized cost.
    
 
   
B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on the
trade date (date the order to buy or sell is executed). Realized gains and
losses on security transactions are determined on the identified cost method.
Dividend income and other distributions are recorded on the ex-dividend date.
Discounts are accreted over the life of the respective securities. Interest
income is accrued daily.
    
 
   
C. MULTIPLE CLASS ALLOCATIONS -- Investment income, expenses (other than
distribution fees), and realized and unrealized gains and losses are allocated
to each class of shares based upon the relative net asset value on the date such
items are recognized. Distribution fees are charged directly to the respective
class.
    
 
   
D. FEDERAL INCOME TAX STATUS -- It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable income to its shareholders.
Accordingly, no federal income tax provision is required.
    
 
   
E. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and
distributions to its shareholders on the record date. The amount of dividends
and distributions from net investment income and net realized capital gains are
determined in accordance with federal income tax regulations which may differ
from generally accepted accounting principles. These "book/tax" differences are
either considered temporary or permanent in nature. To the extent these
differences are permanent in nature, such amounts are reclassified within the
capital accounts based on their federal tax-basis treatment; temporary
differences do not require reclassification. Dividends and distributions which
exceed net investment income and net realized capital gains for financial
reporting purposes but not for tax purposes are reported as dividends in excess
of net investment
    
 
                                       45
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1998, CONTINUED
    
 
   
income or distributions in excess of net realized capital gains. To the extent
they exceed net investment income and net realized capital gains for tax
purposes, they are reported as distributions of paid-in-capital.
    
 
   
2. INVESTMENT MANAGEMENT AGREEMENT
    
 
   
Pursuant to an Investment Management Agreement, the Fund pays the Investment
Manager a management fee, calculated daily and payable monthly, by applying the
following annual rates to the net assets of the Fund determined as of the close
of each business day: 0.60% of the portion of daily net assets not exceeding
$500 million; 0.50% of the portion of daily net assets exceeding $500 million
but not exceeding $750 million; 0.40% of the portion of the daily net assets
exceeding $750 million but not exceeding $1 billion; and 0.30% of the portion of
the daily net assets exceeding $1 billion.
    
 
   
Under the terms of the Agreement, in addition to managing the Fund's
investments, the Investment Manager maintains certain of the Fund's books and
records and furnishes, at its own expense, office space, facilities, equipment,
clerical, bookkeeping and certain legal services and pays the salaries of all
personnel, including officers of the Fund who are employees of the Investment
Manager. The Investment Manager also bears the cost of telephone services, heat,
light, power and other utilities provided to the Fund.
    
 
   
3. PLAN OF DISTRIBUTION
    
 
   
Shares of the Fund are distributed by Morgan Stanley Dean Witter Distributors
Inc. (the "Distributor"), an affiliate of the Investment Manager. The Fund has
adopted a Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the
Act. The Plan provides that the Fund will pay the Distributor a fee which is
accrued daily and paid monthly at the following annual rates: (i) Class A -- up
to 0.25% of the average daily net assets of Class A; (ii) Class B -- 0.85% of
the lesser of: (a) the average daily aggregate gross sales of the Class B shares
since the inception of the Fund (not including reinvestment of dividend or
capital gain distributions) less the average daily aggregate net asset value of
the Class B shares redeemed since the Fund's inception upon which a contingent
deferred sales charge had been imposed or waived; (b) the average daily net
assets of Class B; and (iii) Class C -- up to 0.85% of the average daily net
assets of Class C. In the case of Class A shares, amounts paid under the Plan
are paid to the Distributor for services provided. In the case of Class B and
Class C shares, amounts paid under the plan are paid to the Distributor for
services provided and the expenses borne by it and others in the distribution of
the shares of these Classes, including
    
 
                                       46
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1998, CONTINUED
    
 
   
the payment of commissions for sales of these Classes and incentive compensation
to, and expenses of, Morgan Stanley Dean Witter Financial Advisors and others
who engage in or support distribution of the shares or who service shareholder
accounts, including overhead and telephone expenses; printing and distribution
of prospectuses and reports used in connection with the offering of these shares
to other than current shareholders; and preparation, printing and distribution
of sales literature and advertising materials. In addition, the Distributor may
utilize fees paid pursuant to the Plan, in the case of Class B shares, to
compensate Dean Witter Reynolds Inc. ("DWR"), an affiliate of the Investment
Manager and Distributor, and other selected broker-dealers for their opportunity
costs in advancing such amounts, which compensation would be in the form of a
carrying charge on any unreimbursed expenses.
    
 
   
In the case of Class B shares, provided that the Plan continues in effect, any
cumulative expenses incurred by the Distributor but not yet recovered may be
recovered through the payment of future distribution fees from the Fund pursuant
to the Plan and contingent deferred sales charges paid by investors upon
redemption of Class B shares. Although there is no legal obligation for the Fund
to pay expenses incurred in excess of payments made to the Distributor under the
Plan and the proceeds of contingent deferred sales charges paid by investors
upon redemption of shares, if for any reason the Plan is terminated, the
Trustees will consider at that time the manner in which to treat such expenses.
The Distributor has advised the Fund that such excess amounts, including
carrying charges, totaled $5,232,570 at August 31, 1998.
    
 
   
In the case of Class A shares and Class C shares, expenses incurred pursuant to
the Plan in any calendar year in excess of 0.25% or 0.85% of the average daily
net assets of Class A or Class C, respectively, will not be reimbursed by the
Fund through payments in any subsequent year, except that expenses representing
a gross sales credit to Morgan Stanley Dean Witter Financial Advisors or other
selected broker-dealer representatives may be reimbursed in the subsequent
calendar year. For the year ended August 31, 1998, the distribution fee was
accrued for Class A shares and Class C shares at the annual rate of 0.24% and
0.85%, respectively.
    
 
   
The Distributor has informed the Fund that for the year ended August 31, 1998,
it received contingent deferred sales charges from certain redemptions of the
Fund's Class B shares and Class C shares of $191,024, and $722, respectively and
received $12,907, in front-end sales charges from sales of the Fund's Class A
shares. The respective shareholders pay such charges which are not an expense of
the Fund.
    
 
                                       47
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1998, CONTINUED
    
 
   
4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES
    
 
   
The cost of purchases and proceeds from sales of portfolio securities, excluding
short-term investments, for the year ended August 31, 1998, aggregated
$151,333,080 and $167,039,940, respectively. Included in the aforementioned are
purchases and sales of U.S. Government securities of $50,005,085 and
$56,430,499, respectively.
    
 
   
Morgan Stanley Dean Witter Trust FSB, an affiliate of the Investment Manager and
Distributor, is the Fund's transfer agent. At August 31, 1998, the Fund had
transfer agent fees and expenses payable of approximately $880.
    
 
   
The Fund has an unfunded noncontributory defined benefit pension plan covering
all independent Trustees of the Fund who will have served as independent
Trustees for at least five years at the time of retirement. Benefits under this
plan are based on years of service and compensation during the last five years
of service. Aggregate pension costs for the year ended August 31, 1998 included
in Trustees' fees and expenses in the Statement of Operations amounted to
$5,177. At August 31, 1998, the Fund had an accrued pension liability of $50,913
which is included in accrued expenses in the Statement of Assets and
Liabilities.
    
 
   
5. FEDERAL INCOME TAX STATUS
    
 
   
At August 31, 1998, the Fund had a net capital loss carryover of approximately
$9,446,000, which may be used to offset future capital gains to the extent
provided by regulations, which is available through August 31 of the following
years:
    
 
   
<TABLE>
<CAPTION>
           AMOUNT IN THOUSANDS
- ------------------------------------------
  2003       2004       2005       2006
- ---------  ---------  ---------  ---------
<S>        <C>        <C>        <C>
$   6,656  $     313  $   2,351  $     126
- ---------  ---------  ---------  ---------
- ---------  ---------  ---------  ---------
</TABLE>
    
 
                                       48
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1998, CONTINUED
    
 
   
6. SHARES OF BENEFICIAL INTEREST
    
 
   
Transactions in shares of beneficial interest were as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                           FOR THE YEAR                  FOR THE YEAR
                                                                              ENDED                         ENDED
                                                                         AUGUST 31, 1998              AUGUST 31, 1997+*
                                                                   ----------------------------   --------------------------
                                                                     SHARES          AMOUNT         SHARES         AMOUNT
                                                                   -----------   --------------   -----------   ------------
<S>                                                                <C>           <C>              <C>           <C>
CLASS A SHARES
Sold.............................................................      432,771   $    4,200,291       193,347   $  1,854,318
Reinvestment of dividends........................................        6,280           60,968             5             54
Redeemed.........................................................     (276,388)      (2,677,083)      --             --
                                                                   -----------   --------------   -----------   ------------
Net increase - Class A...........................................      162,663        1,584,176       193,352      1,854,372
                                                                   -----------   --------------   -----------   ------------
 
CLASS B SHARES
Sold.............................................................   19,728,435      191,353,800     8,499,296     80,974,547
Reinvestment of dividends........................................      435,921        4,221,022       587,192      5,604,585
Redeemed.........................................................  (21,536,089)    (208,796,829)  (13,839,797)  (131,962,423)
                                                                   -----------   --------------   -----------   ------------
Net decrease - Class B...........................................   (1,371,733)     (13,222,007)   (4,753,309)   (45,383,291)
                                                                   -----------   --------------   -----------   ------------
 
CLASS C SHARES
Sold.............................................................       57,617          558,111         3,993         38,561
Reinvestment of dividends........................................          842            8,164             6             56
Redeemed.........................................................     ( 15,371)        (148,714)      --             --
                                                                   -----------   --------------   -----------   ------------
Net increase - Class C...........................................       43,088          417,561         3,999         38,617
                                                                   -----------   --------------   -----------   ------------
 
CLASS D SHARES
Sold.............................................................      339,652        3,280,027        10,611        102,479
Reinvestment of dividends........................................       34,184          331,043         2,476         23,704
Redeemed.........................................................     (292,464)      (2,833,902)       (9,547)       (92,140)
                                                                   -----------   --------------   -----------   ------------
Net increase - Class D...........................................       81,372          777,168         3,540         34,043
                                                                   -----------   --------------   -----------   ------------
Net decrease in Fund.............................................   (1,084,610)  $  (10,443,102)   (4,552,418)  $(43,456,259)
                                                                   -----------   --------------   -----------   ------------
                                                                   -----------   --------------   -----------   ------------
</TABLE>
    
 
- ---------------------
 
   
 +   On July 28, 1997, 505,301 shares representing $4,891,310 were transferred
     to Class D.
 *   For Class A, C and D shares, for the period July 28, 1997 (issue date)
     through August 31, 1997.
 
    
 
   
7. SUBSEQUENT EVENT
    
 
   
As of the close of business on September 11, 1998, the Fund acquired all the net
assets of Dean Witter Retirement Series -- Intermediate Income Securities Series
("Retirement Intermediate") pursuant to a plan of reorganization approved by the
shareholders of Retirement Intermediate on August 19, 1998. The acquisition was
accomplished by a tax-free exchange of 250,724 Class D shares of the Fund at a
net asset value of $9.74 per share for 247,422 shares of Retirement
Intermediate. The net assets of the Fund and Retirement Intermediate immediately
before the acquisition were $159,153,039, and $2,441,399, respectively,
including unrealized appreciation of $62,584 for Retirement Intermediate.
Immediately after the acquisition, the combined net assets of the Fund amounted
to $161,594,438.
    
 
                                       49
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
FINANCIAL HIGHLIGHTS
    
 
   
Selected ratios and per share data for a share of beneficial interest
outstanding throughout each period:
    
   
<TABLE>
<CAPTION>
                                                       FOR THE YEAR ENDED AUGUST 31
                      -----------------------------------------------------------------------------------------------
                       1998++    1997*++      1996       1995      1994       1993       1992       1991       1990
- ---------------------------------------------------------------------------------------------------------------------
<S>                   <C>        <C>        <C>        <C>        <C>       <C>        <C>        <C>        <C>
CLASS B SHARES
PER SHARE OPERATING
PERFORMANCE:
Net asset value,
 beginning
 of period..........  $   9.59   $   9.39   $   9.69   $   9.51   $ 10.26   $  10.05   $   9.59   $   9.42   $   9.98
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
Net investment
 income.............      0.51       0.53       0.55       0.59      0.58       0.62       0.70       0.79       0.86
Net realized and
 unrealized gain
 (loss).............      0.11       0.20      (0.30)      0.19     (0.73)      0.20       0.46       0.17      (0.55)
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
Total from
 investment
 operations.........      0.62       0.73       0.25       0.78     (0.15)      0.82       1.16       0.96       0.31
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
Less dividends and
 distributions from:
   Net investment
   income...........     (0.51)     (0.53)     (0.55)     (0.59)    (0.56)     (0.61)     (0.70)     (0.79)     (0.86)
   Net realized
   gain.............     --         --         --         (0.01)    (0.04)     --         --         --         (0.01)
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
Total dividends and
 distributions......     (0.51)     (0.53)     (0.55)     (0.60)    (0.60)     (0.61)     (0.70)     (0.79)     (0.87)
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
Net asset value, end
 of period..........  $   9.70   $   9.59   $   9.39   $   9.69   $  9.51   $  10.26   $  10.05   $   9.59   $   9.42
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
                      --------   --------   --------   --------   -------   --------   --------   --------   --------
TOTAL INVESTMENT
RETURN+.............      6.53%      7.93%      2.58%      8.56%    (1.50)%     8.43%     12.58%     10.78%      3.22%
RATIOS TO AVERAGE
NET ASSETS:
Expenses............      1.71%(4)     1.65%     1.62%     1.63%     1.63%      1.62%      1.69%      1.69%      1.75%
Net investment
 income.............      5.19%(4)     5.52%     5.69%     6.23%     5.80%      6.12%      7.11%      8.49%      8.78%
SUPPLEMENTAL DATA:
Net assets, end of
 period, in
 thousands..........  $151,515   $162,959   $208,911   $232,752   $245,750  $254,431   $187,285   $115,204   $114,086
Portfolio turnover
 rate...............        98%        98%       115%       114%      122%       132%        93%       150%       135%
 
<CAPTION>
                      FOR THE PERIOD
                        AUGUST 31,
                           1989
- ---------------------------------------------------
<S>                   <C>
CLASS B SHARES
PER SHARE OPERATING
PERFORMANCE:
Net asset value,
 beginning
 of period..........  $ 10.00
                       ------
Net investment
 income.............     0.28
Net realized and
 unrealized gain
 (loss).............    (0.02)
                       ------
Total from
 investment
 operations.........     0.26
                       ------
Less dividends and
 distributions from:
   Net investment
   income...........    (0.28)
   Net realized
   gain.............    --
                       ------
Total dividends and
 distributions......    (0.28)
                       ------
Net asset value, end
 of period..........  $  9.98
                       ------
                       ------
TOTAL INVESTMENT
RETURN+.............     2.57%(1)
RATIOS TO AVERAGE
NET ASSETS:
Expenses............     1.42%(2)(3)
Net investment
 income.............     8.18%(2)(3)
SUPPLEMENTAL DATA:
Net assets, end of
 period, in
 thousands..........  $69,946
Portfolio turnover
 rate...............       30%(1)
</TABLE>
    
 
- ---------------------
 
   
 *   Commencement of operations.
**   Prior to July 28, 1997, the Fund issued one class of shares. All shares of
     the Fund held prior to that date, other than shares held by certain
     employee benefit plans established by Dean Witter Reynolds Inc. and its
     affiliate, SPS Transaction Services, Inc., have been designated as Class B
     shares. Shares held by those employee benefit plans prior to July 28, 1997
     have been designated Class D shares.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
(1)  Not annualized.
(2)  Annualized.
(3)  If the Fund had borne all the expenses that were assumed or waived by the
     Investment Manager, the above expense and net investment income ratios
     would have been 2.15% and 7.44%, respectively.
(4)  Reflects overall Fund ratios for investment income and non-class specific
     expenses.
 
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       50
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
FINANCIAL HIGHLIGHTS, CONTINUED
    
 
   
<TABLE>
<CAPTION>
                                                                                            FOR THE PERIOD
                                                                                            JULY 28, 1997*
                                                                          FOR THE YEAR         THROUGH
                                                                              ENDED           AUGUST 31,
                                                                        AUGUST 31, 1998++       1997++
- ----------------------------------------------------------------------------------------------------------
<S>                                                                     <C>                 <C>
CLASS A SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................       $ 9.59             $ 9.68
                                                                             ------             ------
Net investment income.................................................         0.56               0.06
Net realized and unrealized gain (loss)...............................         0.13              (0.10)
                                                                             ------             ------
Total from investment operations......................................         0.69              (0.04)
                                                                             ------             ------
Less dividends from net investment income.............................        (0.57)             (0.05)
                                                                             ------             ------
Net asset value, end of period........................................       $ 9.71             $ 9.59
                                                                             ------             ------
                                                                             ------             ------
TOTAL INVESTMENT RETURN+..............................................         7.30%             (0.46)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         1.10%(3)           2.18%(2)
Net investment income.................................................         5.80%(3)           6.10%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................       $3,457             $1,855
Portfolio turnover rate...............................................           98%                98%
 
CLASS C SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................       $ 9.61             $ 9.68
                                                                             ------             ------
Net investment income.................................................         0.49               0.04
Net realized and unrealized gain (loss)...............................         0.11              (0.07)
                                                                             ------             ------
Total from investment operations......................................         0.60              (0.03)
                                                                             ------             ------
Less dividends from net investment income.............................        (0.50)             (0.04)
                                                                             ------             ------
Net asset value, end of period........................................       $ 9.71             $ 9.61
                                                                             ------             ------
                                                                             ------             ------
TOTAL INVESTMENT RETURN+..............................................         6.39%             (0.31)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         1.71%(3)           2.02%(2)
Net investment income.................................................         5.19%(3)           4.22%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................         $457                $38
Portfolio turnover rate...............................................           98%                98%
</TABLE>
    
 
- ---------------------
 
   
 *   The date shares were first issued.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
(1)  Not annualized.
(2)  Annualized.
(3)  Reflects overall Fund ratios for investment income and non-class specific
     expenses.
 
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       51
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
FINANCIAL HIGHLIGHTS, CONTINUED
    
 
   
<TABLE>
<CAPTION>
                                                                                            FOR THE PERIOD
                                                                          FOR THE YEAR      JULY 28, 1997*
                                                                              ENDED         THROUGH AUGUST
                                                                        AUGUST 31, 1998++     31, 1997++
- ----------------------------------------------------------------------------------------------------------
 
<S>                                                                     <C>                 <C>
CLASS D SHARES
 
PER SHARE OPERATING PERFORMANCE:
 
Net asset value, beginning of period..................................       $ 9.59             $ 9.68
                                                                             ------             ------
 
Net investment income.................................................         0.59               0.05
 
Net realized and unrealized gain (loss)...............................         0.11              (0.09)
                                                                             ------             ------
 
Total from investment operations......................................         0.70              (0.04)
                                                                             ------             ------
 
Less dividends from net investment income.............................        (0.59)             (0.05)
                                                                             ------             ------
 
Net asset value, end of period........................................       $ 9.70             $ 9.59
                                                                             ------             ------
                                                                             ------             ------
 
TOTAL INVESTMENT RETURN+..............................................         7.43%             (0.44)%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         0.86%(3)           1.11%(2)
 
Net investment income.................................................         6.04%(3)           5.91%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................       $5,726             $4,880
 
Portfolio turnover rate...............................................           98%                98%
</TABLE>
    
 
- ---------------------
 
   
 *   The date shares were first issued.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Calculated based on the net asset value as of the last business day of the
     period.
(1)  Not annualized.
(2)  Annualized.
(3)  Reflects overall Fund ratios for investment income and non-class specific
     expenses.
 
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       52
<PAGE>
   
MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
   
REPORT OF INDEPENDENT ACCOUNTANTS
    
 
   
TO THE SHAREHOLDERS AND TRUSTEES
OF MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
    
 
   
In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of Morgan Stanley Dean Witter
Intermediate Income Securities (the "Fund"), formerly Dean Witter Intermediate
Income Securities, at August 31, 1998, the results of its operations for the
year then ended, the changes in its net assets for each of the two years in the
period then ended and the financial highlights for each of the periods
presented, in conformity with generally accepted accounting principles. These
financial statements and financial highlights (hereafter referred to as
"financial statements") are the responsibility of the Fund's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these financial statements in accordance
with generally accepted auditing standards which require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits, which included confirmation of securities at August
31, 1998 by correspondence with the custodian and brokers, provide a reasonable
basis for the opinion expressed above.
    
 
   
PricewaterhouseCoopers LLP
    
   
1177 AVENUE OF THE AMERICAS
    
   
NEW YORK, NEW YORK 10036
OCTOBER 9, 1998
    
 
                                       53
<PAGE>
APPENDIX
- --------------------------------------------------------------------------------
 
RATINGS OF INVESTMENTS
MOODY'S INVESTORS SERVICE INC. ("MOODY'S")
 
                                  BOND RATINGS
 
<TABLE>
<S>        <C>
Aaa        Bonds which are rated Aaa are judged to be of the best quality. They carry the
           smallest degree of investment risk and are generally referred to as "gilt edge."
           Interest payments are protected by a large or by an exceptionally stable margin and
           principal is secure. While the various protective elements are likely to change,
           such changes as can be visualized are
           most unlikely to impair the fundamentally strong position of such issues.
Aa         Bonds which are rated Aa are judged to be of high quality by all standards.
           Together with the Aaa group they comprise what are generally known as high grade
           bonds. They are rated lower than the best bonds because margins of protection may
           not be as large as in Aaa securities or fluctuation of protective elements may be
           of greater amplitude or there may be other elements present which make the
           long-term risks appear somewhat larger than in Aaa securities.
A          Bonds which are rated A possess many favorable investment attributes and are to be
           considered as upper medium grade obligations. Factors giving security to principal
           and interest are considered adequate, but elements may be present which suggest a
           susceptibility to impairment sometime in the future.
Baa        Bonds which are rated Baa are considered as medium grade obligations; i.e., they
           are neither highly protected nor poorly secured. Interest payments and principal
           security appear adequate for the present but certain protective elements may be
           lacking or may be characteristically unreliable over any great length of time. Such
           bonds lack outstanding investment characteristics and in fact have speculative
           characteristics as well.
           Bonds rated Aaa, Aa, A and Baa are considered investment grade bonds.
Ba         Bonds which are rated Ba are judged to have speculative elements; their future
           cannot be considered as well assured. Often the protection of interest and
           principal payments may be very moderate, and therefore not well safeguarded during
           both good and bad times in the future. Uncertainty of position characterizes bonds
           in this class.
B          Bonds which are rated B generally lack characteristics of the desirable investment.
           Assurance of interest and principal payments or of maintenance of other terms of
           the contract over any long period of time may be small.
Caa        Bonds which are rated Caa are of poor standing. Such issues may be in default or
           there may be present elements of danger with respect to principal or interest.
Ca         Bonds which are rated Ca present obligations which are speculative in a high
           degree. Such issues are often in default or have other marked shortcomings.
C          Bonds which are rated C are the lowest rated class of bonds, and issues so rated
           can be regarded as having extremely poor prospects of ever attaining any real
           investment standing.
</TABLE>
 
    RATING REFINEMENTS: Moody's may apply numerical modifiers, 1, 2, and 3 in
each generic rating classification from Aa through B in its municipal bond
rating system. The modifier 1 indicates that the security ranks in the higher
end of its generic rating category; the modifier 2 indicates a mid-range
ranking; and a modifier 3 indicates that the issue ranks in the lower end of its
generic rating category.
 
                            COMMERCIAL PAPER RATINGS
 
    Moody's Commercial Paper ratings are opinions of the ability to repay
punctually promissory obligations not having an original maturity in excess of
nine months. The ratings apply to Municipal Commercial Paper as well as taxable
Commercial Paper. Moody's employs the following three
 
                                       54
<PAGE>
designations, all judged to be investment grade, to indicate the relative
repayment capacity of rated issuers: Prime-1, Prime-2, Prime-3.
 
    Issuers rated Prime-1 have a superior capacity for repayment of short-term
promissory obligations. Issuers rated Prime-2 have a strong capacity for
repayment of short-term promissory obligations; and Issuers rated Prime-3 have
an acceptable capacity for repayment of short-term promissory obligations.
Issuers rated Not Prime do not fall within any of the Prime rating catagories.
 
STANDARD & POOR'S CORPORATION ("STANDARD & POOR'S")
 
                                  BOND RATINGS
 
    A Standard & Poor's bond rating is a current assessment of the
creditworthiness of an obligor with respect to a specific obligation. This
assessment may take into consideration obligors such as guarantors, insurers, or
lessees.
 
    The ratings are based on current information furnished by the issuer or
obtained by Standard & Poor's from other sources it considers reliable. The
ratings are based, in varying degrees, on the following considerations: (1)
likelihood of default-capacity and willingness of the obligor as to the timely
payment of interest and repayment of principal in accordance with the terms of
the obligation; (2) nature of and provisions of the obligation; and (3)
protection afforded by, and relative position of, the obligation in the event of
bankruptcy, reorganization or other arrangement under the laws of bankruptcy and
other laws affecting creditors' rights.
 
    Standard & Poor's does not perform an audit in connection with any rating
and may, on occasion, rely on unaudited financial information. The ratings may
be changed, suspended or withdrawn as a result of changes in, or unavailability
of, such information, or for other reasons.
 
<TABLE>
<S>        <C>
AAA        Debt rated "AAA" has the highest rating assigned by Standard & Poor's. Capacity to
           pay interest and repay principal is extremely strong.
AA         Debt rated "AA" has a very strong capacity to pay interest and repay principal and
           differs from the highest-rated issues only in small degree.
A          Debt rated "A" has a strong capacity to pay interest and repay principal although
           they are somewhat more susceptible to the adverse effects of changes in
           circumstances and economic conditions than debt in higher-rated categories.
BBB        Debt rated "BBB" is regarded as having an adequate capacity to pay interest and
           repay principal. Whereas it normally exhibits adequate protection parameters,
           adverse economic conditions or changing circumstances are more likely to lead to a
           weakened capacity to pay interest and repay principal for debt in this category
           than for debt in higher-rated categories.
           Bonds rated AAA, AA, A and BBB are considered investment grade bonds.
BB         Debt rated "BB" has less near-term vulnerability to default than other speculative
           grade debt. However, it faces major ongoing uncertainties or exposure to adverse
           business, financial or economic conditions which could lead to inadequate capacity
           or willingness to pay interest and repay principal.
B          Debt rated "B" has a greater vulnerability to default but presently has the
           capacity to meet interest payments and principal repayments. Adverse business,
           financial or economic conditions would likely impair capacity or willingness to pay
           interest and repay principal.
CCC        Debt rated "CCC" has a current identifiable vulnerability to default, and is
           dependent upon favorable business, financial and economic conditions to meet timely
           payments of interest and repayments of principal. In the event of adverse business,
           financial or economic conditions, it is not likely to have the capacity to pay
           interest and repay principal.
CC         The rating "CC" is typically applied to debt subordinated to senior debt which is
           assigned an actual or implied "CCC" rating.
</TABLE>
 
                                       55
<PAGE>
<TABLE>
<S>        <C>
C          The rating "C" is typically applied to debt subordinated to senior debt which is
           assigned an actual or implied "CCC-" debt rating.
CI         The rating "CI" is reserved for income bonds on which no interest is being paid.
NR         Indicates that no rating has been requested, that there is insufficient information
           on which to base a rating or that Standard & Poor's does not rate a particular type
           of obligation as a matter of policy.
           Bonds rated "BB", "B", "CCC", "CC" and "C" are regarded as having predominantly
           speculative characteristics with respect to capacity to pay interest and repay
           principal. "BB" indicates the least degree of speculation and "C" the highest
           degree of speculation. While such debt will likely have some quality and protective
           characteristics, these are outweighed by large uncertainties or major risk
           exposures to adverse conditions.
           Plus (+) or minus (-): The rating from "AA" to "CCC" may be modified by the
           addition of a plus or minus sign to show relative standing within the major ratings
           categories.
</TABLE>
 
                            COMMERCIAL PAPER RATINGS
 
    Standard and Poor's commercial paper rating is a current assessment of the
likelihood of timely payment of debt having an original maturity of no more than
365 days. The commercial paper rating is not a recommendation to purchase or
sell a security. The ratings are based upon current information furnished by the
issuer or obtained by Standard and Poor's from other sources it considers
reliable. The ratings may be changed, suspended, or withdrawn as a result of
changes in or unavailability of such information. Ratings are graded into group
categories, ranging from "A" for the highest quality obligations to "D" for the
lowest. Ratings are applicable to both taxable and tax-exempt commercial paper.
The categories are as follows:
 
    Issues assigned A ratings are regarded as having the greatest capacity for
timely payment. Issues in this category are further refined with the designation
1, 2 and 3 to indicate the relative degree of safety.
 
<TABLE>
<S>        <C>
A-1        indicates that the degree of safety regarding timely payment is very strong.
A-2        indicates capacity for timely payment on issues with this designation is strong.
           However, the relative degree of safety is not as overwhelming as for issues
           designated "A-1."
A-3        indicates a satisfactory capacity for timely payment. Obligations carrying this
           designation are, however, somewhat more vulnerable to the adverse effects of
           changes in circumstances than obligations carrying the higher designations.
</TABLE>
 
                                       56
<PAGE>

              MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES

                              PART C  OTHER INFORMATION


Item 24.  Financial Statements and Exhibits

     (a)  FINANCIAL STATEMENTS 
     
     (1)  Financial statements and schedules, included 
          in Prospectus (Part A):
                                                                 Page in
                                                                 Prospectus 
                                                                 -----------
               Financial Highlights for the period May 3, 1989
          (commencement of operations) through August 31, 1989 
          and for the years ended August 31, 1990, 1991,1992,
          1993, 1994, 1995, 1996 , 1997 and 1998 ( Class B).....       6
          
          
          Financial Highlights for the period July 28, 1997 
          through August 31, 1997 and for the fiscal year ended
          August 31, 1998 (Classes A, C and D)..................       7

     (2)  Financial statements included in the Statement of Additional 
          Information (Part B):
                                                                 Page In
                                                                 SAI       
                                                                 ---
          Portfolio of Investments at August 31, 1998...........  39

          Statement of Assets and Liabilities at August 31,1998.  42

          Statement of Operations for the year ended 
          August 31, 1998.......................................  42

          Statement of Changes in Net Assets for the years ended 
          August 31, 1997 and August 31, 1998...................  43

          Notes to Financial Statements at August 31, 1998......  44
          
          Financial Highlights for the period May 3, 1989 through 
          August 31, 1989 and for the years ended August 31, 1990, 
          1991, 1992, 1993, 1994, 1995, 1996, 1997and 1998 
          (Class B).............................................  50

          Financial Highlights for the period July 28, 1997 through
          August 31, 1997 and for the fiscal year ended 
          August 31, 1998 (Classes A, C and D)..................  51



     (3)  Financial statements included in Part C:

          None


<PAGE>


b) EXHIBITS:

           1.  Form of Amendment to the Declaration of Trust of the Registrant.
          
           2.  Amended and Restated By-Laws of the Registrant dated October 23,
               1997.
          
           5.  Form of Amended Investment Management Agreement between the
               Registrant and Morgan Stanley Dean Witter Advisors Inc.
          
           6.  Form of Amended Distribution Agreement between Registrant and
               Morgan Stanley Dean Witter Distributors Inc.
          
           8.  Form of Amended and Restated Transfer Agency and Service
               Agreement between the Registrant and Morgan Stanley Dean Witter
               Trust FSB 

           9.  Form of Amended Services Agreement between Morgan Stanley Dean
               WitterAdvisors Inc. and Morgan Stanley Dean Witter Services
               Company Inc.

          11.  Consent of Independent Accountants.

          16.  Schedules for Computations of Performance Quotations.

          18.  Amended Multiple-Class Plan pursuant to Rule 18f-3.

          27.  Financial Data Schedules as of August 31, 1998.

- --------------------------------------------------------------------------------
All other exhibits were previously filed via EDGAR and are hereby incorporated
by reference.


Item 25.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT.

          None

Item 26.  NUMBER OF HOLDERS OF SECURITIES.

          (1)                                     (2)
                                       Number of Record Holders
     Title of Class                     at September 30, 1998
     --------------                    ------------------------
     Share of Beneficial Interest

     Class A                                      747
     Class B                                    8,803
     Class C                                       50
     Class D                                      427

                                       2
<PAGE>

Item 27.  INDEMNIFICATION

     Pursuant to Section 5.3 of the Registrant's Declaration of Trust and under
Section 4.8 of the Registrant's By-Laws, the indemnification of the Registrant's
trustees, officers, employees and agents is permitted if it is determined that
they acted under the belief that their actions were in or not opposed to the
best interest of the Registrant, and, with respect to any criminal proceeding,
they had reasonable cause to believe their conduct was not unlawful.  In
addition, indemnification is permitted only if it is determined that the actions
in question did not render them liable by reason of willful misfeasance, bad
faith or gross negligence in the performance of their duties or by reason of
reckless disregard of their obligations and duties to the Registrant.  Trustees,
officers, employees and agents will be indemnified for the expense of litigation
if it is determined that they are entitled to indemnification against any
liability established in such litigation.  The Registrant may also advance money
for these expenses provided that they give their undertakings to repay the
Registrant unless their conduct is later determined to permit indemnification.

     Pursuant to Section 5.2 of the Registrant's Declaration of Trust and
paragraph 8 of the Registrant's Investment Management Agreement, neither the
Investment Manager nor any trustee, officer, employee or agent of the Registrant
shall be liable for any action or failure to act, except in the case of bad
faith, willful misfeasance, gross negligence or reckless disregard of duties to
the Registrant.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 (the "Act") 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 against the Registrant by such trustee, officer or controlling person
in connection with the shares being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act, and will
be governed by the final adjudication of such issue.

     The Registrant hereby undertakes that it will apply the indemnification
provision of its by-laws in a manner consistent with Release 11330 of the
Securities and Exchange Commission under the Investment Company Act of 1940, so
long as the interpretation of Sections 17(h) and 17(i) of such Act remains in
effect.

     Registrant, in conjunction with the Investment Manager, Registrant's
Trustees, and other registered investment management companies managed by the
Investment Manager, maintains insurance on behalf of any person who is or was a
Trustee, officer, employee, or agent of Registrant, or who is or was serving at
the request of Registrant as a trustee, director, officer, employee or agent of
another trust or corporation, against any liability asserted against him and
incurred by him or arising out of his position.  However, in no event will
Registrant maintain insurance to indemnify any such person for any act for which
Registrant itself is not permitted to indemnify him.

                                       3
<PAGE>


Item 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISOR

     See "The Fund and Its Management" in the Prospectus regarding the business
of the investment advisor.  The following information is given regarding
officers of Morgan Stanley Dean Witter Advisors Inc. ("MSDW Advisors").  MSDW
Advisors is a wholly-owned subsidiary of Morgan Stanley Dean Witter & Co.  The
principal address of the Morgan Stanley Dean Witter Funds is Two World Trade
Center, New York, New York 10048.

     The term "Morgan Stanley Dean Witter Funds" refers to the following
registered investment companies:

CLOSED-END INVESTMENT COMPANIES
(1)  Dean Witter Government Income Trust
(2)  High Income Advantage Trust
(3)  High Income Advantage Trust II
(4)  High Income Advantage Trust III
(5)  InterCapital California Insured Municipal Income Trust
(6)  InterCapital California Quality Municipal Securities
(7)  InterCapital Income Securities Inc.
(8)  InterCapital Insured California Municipal Securities
(9)  InterCapital Insured Municipal Bond Trust
(10) InterCapital Insured Municipal Income Trust
(11) InterCapital Insured Municipal Securities
(12) InterCapital Insured Municipal Trust
(13) InterCapital New York Quality Municipal Securities
(14) InterCapital Quality Municipal Income Trust
(15) InterCapital Quality Municipal Investment Trust
(16) InterCapital Quality Municipal Securities
(17) Municipal Income Opportunities Trust
(18) Municipal Income Opportunities Trust II
(19) Municipal Income Opportunities Trust III
(20) Municipal Income Trust
(21) Municipal Income Trust II
(22) Municipal Income Trust III
(23) Municipal Premium Income Trust
(24) Morgan Stanley Dean Witter Prime Income Trust

OPEN-END INVESTMENT COMPANIES
(1)  Active Assets California Tax-Free Trust
(2)  Active Assets Government Securities Trust
(3)  Active Assets Money Trust
(4)  Active Assets Tax-Free Trust
(5)  Morgan Stanley Dean Witter American Value Fund
(6)  Morgan Stanley Dean Witter Balanced Growth Fund
(7)  Morgan Stanley Dean Witter Balanced Income Fund
(8)  Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(9)  Morgan Stanley Dean Witter California Tax-Free Income Fund
(10) Morgan Stanley Dean Witter Capital Appreciation Fund
(11) Morgan Stanley Dean Witter Capital Growth Securities
(12) Morgan Stanley Dean Witter Competitive Edge Fund, "BEST IDEAS PORTFOLIO"
(13) Morgan Stanley Dean Witter Convertible Securities Trust

                                       4
<PAGE>


(14) Morgan Stanley Dean Witter Developing Growth Securities Trust
(15) Morgan Stanley Dean Witter Diversified Income Trust 
(16) Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(17) Morgan Stanley Dean Witter Equity Fund
(18) Morgan Stanley Dean Witter European Growth Fund Inc.
(19) Morgan Stanley Dean Witter Federal Securities Trust
(20) Morgan Stanley Dean Witter Financial Services Trust
(21) Morgan Stanley Dean Witter Fund of Funds
(22) Morgan Stanley Dean Witter Global Dividend Growth Securities
(23) Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
(24) Morgan Stanley Dean Witter Global Utilities Fund
(25) Morgan Stanley Dean Witter Growth Fund
(26) Morgan Stanley Dean Witter Hawaii Municipal Trust
(27) Morgan Stanley Dean Witter Health Sciences Trust
(28) Morgan Stanley Dean Witter High Yield Securities Inc.
(29) Morgan Stanley Dean Witter Income Builder Fund
(30) Morgan Stanley Dean Witter Information Fund
(31) Morgan Stanley Dean Witter Intermediate Income Securities
(32) Morgan Stanley Dean Witter International SmallCap Fund
(33) Morgan Stanley Dean Witter Japan Fund
(34) Morgan Stanley Dean Witter Limited Term Municipal Trust
(35) Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(36) Morgan Stanley Dean Witter Market Leader Trust
(37) Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
(38) Morgan Stanley Dean Witter Mid-Cap Growth Fund
(39) Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(40) Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(41) Morgan Stanley Dean Witter New York Municipal Money Market Trust
(42) Morgan Stanley Dean Witter New York Tax-Free Income Fund
(43) Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(44) Morgan Stanley Dean Witter Precious Metals and Minerals Trust
(45) Morgan Stanley Dean Witter S&P 500 Index Fund
(46) Morgan Stanley Dean Witter S&P 500 Select Fund
(47) Morgan Stanley Dean Witter Select Dimensions Investment Series
(48) Morgan Stanley Dean Witter Select Municipal Reinvestment Fund
(49) Morgan Stanley Dean Witter Short-Term Bond Fund
(50) Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(51) Morgan Stanley Dean Witter Special Value Fund
(52) Morgan Stanley Dean Witter Strategist Fund 
(53) Morgan Stanley Dean Witter Tax-Exempt Securities Trust
(54) Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(55) Morgan Stanley Dean Witter U.S. Government Money Market Trust
(56) Morgan Stanley Dean Witter U.S. Government Securities Trust
(57) Morgan Stanley Dean Witter Utilities Fund
(58) Morgan Stanley Dean Witter Value-Added Market Series
(59) Morgan Stanley Dean Witter Value Fund
(60) Morgan Stanley Dean Witter Variable Investment Series
(61) Morgan Stanley Dean Witter World Wide Income Trust


                                       5
<PAGE>

     The term "TCW/DW Funds" refers to the following registered investment
companies:

OPEN-END INVESTMENT COMPANIES
(1)  TCW/DW Emerging Markets Opportunities Trust
(2)  TCW/DW Global Telecom Trust
(3)  TCW/DW Income and Growth Fund
(4)  TCW/DW Latin American Growth Fund
(5)  TCW/DW Mid-Cap Equity Trust
(6)  TCW/DW North American Government Income Trust
(7)  TCW/DW Small Cap Growth Fund
(8)  TCW/DW Total Return Trust

CLOSED-END INVESTMENT COMPANIES 
(1)  TCW/DW Term Trust 2000
(2)  TCW/DW Term Trust 2002 
(3)  TCW/DW Term Trust 2003



<TABLE>
<CAPTION>

NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION
- -------------------------     ------------------------------------------------
<S>                           <C>
Mitchell M. Merin             Chairman and Director of Morgan Stanley Dean Witter
President, Chief              Distributors Inc. ("MSDW Distributors") and Morgan 
Executive Officer and         Stanley Dean Witter Trust FSB ("MSDW Trust"); President,
Director                      Chief Executive Officer and Director of Morgan Stanley
                              Dean Witter Services Company Inc. ("MSDW Services"); 
                              Executive Vice President and Director of Dean Witter 
                              Reynolds Inc. ("DWR"); Director of SPS Transaction 
                              Services, Inc. and various other Morgan Stanley Dean 
                              Witter & Co. ("MSDW") subsidiaries.
                              
Thomas C. Schneider           Executive Vice President and Chief Strategic and
Executive Vice                Administrative Officer of MSDW; Executive Vice
President and Chief           President and Chief Financial Officer of MSDW Services;
Financial Officer             Director of DWR and MSDW.

Robert M. Scanlan             President, Chief Operating Officer and Director of MSDW 
President, Chief              Services, Executive Vice President of MSDW Distributors; 
Operating Officer             Executive Vice President and Director of MSDW Trust; 
and Director                  Vice President of the Morgan Stanley Dean Witter Funds 
                              and the TCW/DW Funds.

Joseph J. McAlinden           Vice President of the Morgan Stanley Dean Witter Funds 
Executive Vice President      and Director of MSDW Trust.
and Chief Investment
Officer   

Ronald E. Robison        
Executive Vice President 
and Chief Administrative
Officer

                                       6
<PAGE>

<CAPTION>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION
- -------------------------     ------------------------------------------------
<S>                           <C>
Edward C. Oelsner, III
Executive Vice President

Barry Fink                    Assistant Secretary of DWR; Senior Vice President,
Senior Vice President,        Secretary, General Counsel and Director of MSDW 
Secretary, General            Services; Senior Vice President, Assistant Secretary and 
Counsel and Director          Assistant General Counsel of MSDW Distributors; Vice 
                              President, Secretary and General Counsel of the Morgan
                              Stanley Dean Witter Funds and the TCW/DW Funds.
                         
Peter M. Avelar               Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Mark Bavoso                   Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.         

Richard Felegy
Senior Vice President

Edward F. Gaylor              Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Robert S. Giambrone           Senior Vice President of MSDW Services, MSDW 
Senior Vice President         Distributors and MSDW Trust and Director of MSDW Trust;
                              Vice President of the Morgan Stanley Dean Witter Funds 
                              and the TCW/DW Funds. 
     
Rajesh Gupta                  Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Kenton J. Hinchliffe          Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Kevin Hurley                  Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Margaret Iannuzzi
Senior Vice President

Jenny Beth Jones              Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

John B. Kemp, III             President of MSDW Distributors.
Senior Vice President    

Anita H. Kolleeny             Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.    

                                       7
<PAGE>

<CAPTION>

NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION
- -------------------------     ------------------------------------------------
<S>                           <C>
Jonathan R. Page              Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Ira N. Ross                   Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Guy G. Rutherfurd, Jr.        Vice President of various Morgan Stanley Dean Witter
Senior Vice President         Funds.

Rochelle G. Siegel            Vice President of various Morgan Stanley Dean Witter
Senior Vice President         Funds.

Jayne M. Stevlingson          Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Paul D. Vance                 Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Elizabeth A. Vetell 
Senior Vice President

James F. Willison             Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Ronald J. Worobel             Vice President of various Morgan Stanley Dean Witter 
Senior Vice President         Funds.

Douglas Brown  
First Vice President

Thomas F. Caloia              First Vice President and Assistant Treasurer of
First Vice President          MSDW Services; Assistant Treasurer of MSDW 
and Assistant                 Distributors; Treasurer and Chief Financial Officer of the
Treasurer                     Morgan Stanley Dean Witter Funds and the TCW/DW 
                              Funds.

Thomas Chronert     
First Vice President

Rosalie Clough
First Vice President

Marilyn K. Cranney            Assistant Secretary of DWR; First Vice President and
First Vice President          Assistant Secretary of MSDW Services; Assistant 
and Assistant Secretary       Secretary of the Morgan Stanley Dean Witter Funds and 
                              the TCW/DW Funds.

                                       8
<PAGE>

<CAPTION>

NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION                     
- -------------------------     -------------------------------------------------
<S>                           <C>
Salvatore DeSteno             Vice President of MSDW Services.
First Vice President

Michael Interrante            First Vice President and Controller of MSDW Services; 
First Vice President          Assistant Treasurer of MSDW Distributors; First Vice
and Controller                President and Treasurer of MSDW Trust. 

David Johnson
First Vice President

Stanley Kapica
First Vice President

Carsten Otto                  First Vice President and Assistant Secretary of MSDW
First Vice President          Services; Assistant Secretary of the Morgan Stanley
and Assistant Secretary       Dean Witter Funds and the TCW/DW Funds.
          

Robert Zimmerman
First Vice President

Dale Albright
Vice President

Joan G. Allman
Vice President

Andrew Arbenz
Vice President

Joseph Arcieri                Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.

Nancy Belza
Vice President

Maurice Bendrihem
Vice President and
Assistant Controller

Frank Bruttomesso             Vice President and Assistant Secretary of MSDW 
Vice President and            Services; Assistant Secretary of the Morgan Stanley Dean 
Assistant Secretary           Witter Funds and the TCW/DW Funds.

Ronald Caldwell
Vice President

                                       9
<PAGE>

<CAPTION>

NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION                     
- -------------------------     ------------------------------------------------------
<S>                           <C>
Joseph Cardwell
Vice President

Philip Casparius
Vice President

David Dineen                  Vice President of Dean Witter Global Asset Allocation
Vice President                Fund.

Bruce Dunn
Vice President

Michael Durbin
Vice President

Sheila Finnerty
Vice President

Jeffrey D. Geffen
Vice President

Michael Geringer
Vice President

Ellen Gold
Vice President

Stephen Greenhut
Vice President

Sandra Grossman
Vice President

Peter W. Gurman
Vice President

Matthew Haynes                Vice President of various Morgan Stanley Dean Witter
Vice President                Funds.

Peter Hermann                 Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.

Elizabeth Hinchman
Vice President

David Hoffman
Vice President

                                       10
<PAGE>

<CAPTION>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION                     
- -------------------------     ------------------------------------------------------
<S>                           <C>
Christopher Jones
Vice President

Kevin Jung
Vice President

Carol Espejo Kane
Vice President

James P. Kastberg
Vice President

Michelle Kaufman              Vice President of various Morgan Stanley Dean Witter   
Vice President                Funds.

Paula LaCosta                 Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.

Thomas Lawlor
Vice President

Gerard J. Lian                Vice President of various Morgan Stanley Dean Witter   
Vice President                Funds.

Nancy Login
Vice President

Steven MacNamara
Vice President

Catherine Maniscalco          Vice President of Morgan Stanley Dean Witter Natural 
Vice President                Resource Development Securities Inc.

Albert McGarity
Vice President

LouAnne D. McInnis            Vice President and Assistant Secretary of MSDW 
Vice President and            Services; Assistant Secretary of the Morgan Stanley Dean 
Assistant Secretary           Witter Funds and the TCW/DW Funds.

Sharon K. Milligan  
Vice President

Julie Morrone  
Vice President

                                       11
<PAGE>

<CAPTION>

NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION                          
- -------------------------     ------------------------------------------------------
<S>                           <C>
Mary Beth Mueller
Vice President

David Myers                   Vice President of Morgan Stanley Dean Witter Natural   
Vice President                Resource Development Securities Inc.

Richard Norris
Vice President

George Paoletti
Vice President

Anne Pickrell                 Vice President of various  Morgan Stanley Dean Witter 
Vice President                Funds.
     
Michael Roan
Vice President

John Roscoe
Vice President

Hugh Rose
Vice President

Robert Rossetti               Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.

Ruth Rossi                    Vice President and Assistant Secretary of MSDW 
Vice President and            Services; Assistant Secretary of the Morgan Stanley Dean 
Assistant Secretary           Witter Funds and the TCW/DW Funds.

Carl F. Sadler
Vice President

Deborah Santaniello
Vice President

Peter J. Seeley               Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.

Robert Stearns
Vice President
Julie Morrone  
Vice President

                                       12
<PAGE>

<CAPTION>

NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH 
MORGAN STANLEY DEAN           OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS 
WITTER ADVISORS INC.          AND NATURE OF CONNECTION                          
- -------------------------     -----------------------------------------------------
<S>                           <C>
Naomi Stein
Vice President

Kathleen H. Stromberg         Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.    

Marybeth Swisher
Vice President

Robert Vanden Assem
Vice President

James P. Wallin
Vice President

Alice Weiss                   Vice President of various Morgan Stanley Dean Witter 
Vice President                Funds.

John Wong
Vice President


</TABLE>



Item 29.    Principal Underwriters

(a)  Morgan Stanley Dean Witter Distributors Inc. ("MSDW Distributors"), a
Delaware corporation, is the principal underwriter of the Registrant. MSDW
Distributors is also the principal underwriter of the following investment
companies:

(1)  Active Assets California Tax-Free Trust
(2)  Active Assets Government Securities Trust
(3)  Active Assets Money Trust
(4)  Active Assets Tax-Free Trust
(5)  Morgan Stanley Dean Witter American Value Fund
(6)  Morgan Stanley Dean Witter Balanced Growth Fund
(7)  Morgan Stanley Dean Witter Balanced Income Fund
(8)  Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(9)  Morgan Stanley Dean Witter California Tax-Free Income Fund
(10) Morgan Stanley Dean Witter Capital Appreciation Fund
(11)Morgan Stanley Dean Witter Capital Growth Securities
(12) Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas Portfolio"
(13) Morgan Stanley Dean Witter Convertible Securities Trust
(14) Morgan Stanley Dean Witter Developing Growth Securities Trust
(15) Morgan Stanley Dean Witter Diversified Income Trust 
(16) Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(17) Morgan Stanley Dean Witter Equity Fund
(18) Morgan Stanley Dean Witter European Growth Fund Inc.
(19) Morgan Stanley Dean Witter Federal Securities Trust

                                       13


<PAGE>

(20) Morgan Stanley Dean Witter Financial Services Trust
(21) Morgan Stanley Dean Witter Fund of Funds
(22) Morgan Stanley Dean Witter Global Dividend Growth Securities
(23) Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
(24) Morgan Stanley Dean Witter Global Utilities Fund
(25) Morgan Stanley Dean Witter Growth Fund
(26) Morgan Stanley Dean Witter Hawaii Municipal Trust
(27) Morgan Stanley Dean Witter Health Sciences Trust
(28) Morgan Stanley Dean Witter High Yield Securities Inc.
(29) Morgan Stanley Dean Witter Income Builder Fund
(30) Morgan Stanley Dean Witter Information Fund
(31) Morgan Stanley Dean Witter Intermediate Income Securities
(32) Morgan Stanley Dean Witter International SmallCap Fund
(33) Morgan Stanley Dean Witter Japan Fund
(34) Morgan Stanley Dean Witter Limited Term Municipal Trust
(35) Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(36) Morgan Stanley Dean Witter Market Leader Trust
(37) Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
(38) Morgan Stanley Dean Witter Mid-Cap Growth Fund
(39) Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(40) Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(41) Morgan Stanley Dean Witter New York Municipal Money Market Trust
(42) Morgan Stanley Dean Witter New York Tax-Free Income Fund
(43) Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(44) Morgan Stanley Dean Witter Precious Metals and Minerals Trust
(45) Morgan Stanley Dean Witter Prime Income Trust
(46) Morgan Stanley Dean Witter S&P 500 Index Fund
(47) Morgan Stanley Dean Witter S&P 500 Select Fund
(48) Morgan Stanley Dean Witter Short-Term Bond Fund
(49) Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(50) Morgan Stanley Dean Witter Special Value Fund
(51) Morgan Stanley Dean Witter Strategist Fund 
(52) Morgan Stanley Dean Witter Tax-Exempt Securities Trust
(53) Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(54) Morgan Stanley Dean Witter U.S. Government Money Market Trust
(55) Morgan Stanley Dean Witter U.S. Government Securities Trust
(56) Morgan Stanley Dean Witter Utilities Fund
(57) Morgan Stanley Dean Witter Value-Added Market Series
(58) Morgan Stanley Dean Witter Value Fund
(59) Morgan Stanley Dean Witter Variable Investment Series
(60) Morgan Stanley Dean Witter World Wide Income Trust
(1)  TCW/DW Emerging Markets Opportunities Trust 
(2)  TCW/DW Global Telecom Trust
(3)  TCW/DW Income and Growth
(4)  TCW/DW Latin American Growth Fund
(5)  TCW/DW Mid-Cap Equity Trust
(6)  TCW/DW North American Government Income Trust
(7)  TCW/DW Small Cap Growth Fund
(8)  TCW/DW Total Return Trust 

                                       14
<PAGE>

(b)  The following information is given regarding directors and officers of MSDW
     Distributors not listed in Item 28 above.  The principal address of MSDW
     Distributors is Two World Trade Center, New York, New York 10048.  None of
     the following persons has any position or office with the Registrant.

NAME                     POSITIONS AND OFFICE WITH MSDW DISTRIBUTORS 
- ----                     -------------------------------------------
Richard M. DeMartini     Director

Christine Edwards        Executive Vice President, Secretary, Director and Chief
                         Legal Officer. 
     
Michael T. Gregg         Vice President and Assistant Secretary.

James F. Higgins         Director

Fredrick K. Kubler       Senior Vice President, Assistant Secretary and Chief 
                         Compliance Officer.

Philip J. Purcell        Director

John Schaeffer           Director

Charles Vidala           Senior Vice President and Financial Principal
     
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 are
maintained by the Investment Manager at its offices, except records relating to
holders of shares issued by the Registrant, which are maintained by the
Registrant's Transfer Agent, at its place of business as shown in the
prospectus.
     
Item 31.  MANAGEMENT SERVICES
     
     Registrant is not a party to any such management-related service contract.
     

                                       15

<PAGE>

                                      SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it meets all of
the requirements for effectiveness of this Registration Statement pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this
Post-Effective Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York
and State of New York on the 30th day of October, 1998.

                    MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES 
                                                
                                        By  /s/ Barry Fink          
                                           -------------------------
                                                Barry Fink
                                        Vice President and Secretary

     Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 12 has been signed below by the following persons
in the capacities and on the dates indicated.

     Signatures                         Title                    Date
     ----------                         -----                    ----
(1) Principal Executive Officer         President, Chief 
                                        Executive Officer,
                                        Trustee and Chairman
By  /s/   Charles A. Fiumefreddo                                10/30/98
    ----------------------------
          Charles A. Fiumefreddo

(2) Principal Financial Officer         Treasurer and Principal
                                        Accounting Officer
                   
By   /s/  Thomas F. Caloia                                      10/30/98
    -----------------------------
          Thomas F. Caloia

(3) Majority of the Trustees 

    Charles A. Fiumefreddo (Chairman)
    Philip J. Purcell

By   /s/  Barry Fink                                            10/30/98 
    -----------------------------
          Barry Fink
          Attorney-in-Fact

    Manuel H. Johnson         Wayne E. Hedien
    Michael Bozic             Michael E. Nugent
    Edwin J. Garn             John L. Schroeder
    John R. Haire             
                             
    
By  /s/   David M. Butowsky                                     10/30/98
    ------------------------------
          David M. Butowsky  
          Attorney-in-Fact 
                   

<PAGE>
                                    EXHIBIT INDEX:

      1.  Form of Amendment to the Declaration of Trust of the Registrant.
          
      2.  Amended and Restated By-Laws of the Registrant dated October 23, 1997.
          
      5.  Form of Amended Investment Management Agreement between the Registrant
          and Morgan Stanley Dean Witter Advisors Inc.
          
      6.  Form of Amended Distribution Agreement between Registrant and Morgan
          Stanley Dean Witter Distributors Inc.
          
      8.  Form of Amended and Restated Transfer Agency and Service
          Agreement between the Registrant and Morgan Stanley Dean Witter Trust 
          FSB 

      9.  Form of Amended Services Agreement between Morgan Stanley Dean Witter
          Advisors Inc. and Morgan Stanley Dean Witter Services Company Inc.

     11.  Consent of Independent Accountants.

     16.  Schedules for Computations of Performance Quotations.

     18.  Amended Multiple-Class Plan pursuant to Rule 18f-3.

     27.  Financial Data Schedules as of August 31, 1998.

<PAGE>



                                     CERTIFICATE


     The undersigned hereby certifies that he is the Secretary of Dean Witter
Intermediate Income Securities (the "Trust"), an unincorporated business trust
organized under the laws of the Commonwealth of Massachusetts, that annexed
hereto is an Amendment to the Declaration of Trust of the Trust adopted by the
Trustees of the Trust on April 30, 1998 as provided in Section 9.3 of the said
Declaration, said Amendment to take effect on June 22, 1998, and I do hereby
further certify that such amendment has not been amended and is on the date
hereof in full force and effect.

     Dated this 22nd day of June, 1998.





                              --------------------------------
                              Barry Fink
                              Secretary 


<PAGE>


                                      AMENDMENT





Dated:              June 22, 1998

To be Effective:    June 22, 1998





                                          TO

                      DEAN WITTER INTERMEDIATE INCOME SECURITIES

                                 DECLARATION OF TRUST

                                        DATED

                                   AUGUST 31, 1988


<PAGE>


              Amendment dated June 22, 1998 to the Declaration of Trust
     (the "Declaration") of Dean Witter Intermediate Income Securities (the
                            "Trust") dated August 31, 1988


     WHEREAS, the Trust was established by the Declaration on the date
hereinabove set forth under the laws of the Commonwealth of Massachusetts; and
     
     WHEREAS, the Trustees of the Trust have deemed it advisable to change the
name of the Trust to "Morgan Stanley Dean Witter Intermediate Income
Securities," such change to be effective on June 22, 1998;

NOW, THEREFORE:

     1.  Section 1.1 of Article I of the Declaration is hereby amended so that
that Section shall read in its entirety as follows:

          "Section 1.1. NAME.  The name of the Trust created hereby is the
          Morgan Stanley Dean Witter Intermediate Income Securities and so far
          as may be practicable the Trustees shall conduct the Trust's
          activities, execute all documents and sue or be sued under that name,
          which name (and the word "Trust" whenever herein used) shall refer to
          the Trustees as Trustees, and not as individuals, or personally, and
          shall not refer to the officers, agents, employees or Shareholders of
          the Trust.  Should the Trustees determine that the use of such name is
          not advisable, they may use such other name for the Trust as they deem
          proper and the Trust may hold its property and conduct its activities
          under such other name."

     2.  Subsection (o) of Section 1.2 of Article I of the Declaration is hereby
amended so that that subsection shall read in its entirety as follows:

          "Section 1.2. DEFINITIONS...
          
          "(o) "TRUST" means the Morgan Stanley Dean Witter Intermediate Income
          Securities."
          
     3.  Section 11.7 of Article XI of the Declaration is hereby amended so that
that section shall read as follows:

          "Section 11.7 . USE OF THE NAME "MORGAN STANLEY DEAN WITTER."  Morgan
          Stanley Dean Witter & Co. ("MSDW") has consented to the use by the
          Trust of the identifying name "Morgan Stanley Dean Witter," which is a
          property right of MSDW.  The Trust will only use the name "Morgan
          Stanley Dean Witter" as a component of its 


<PAGE>


          name and for no other purpose, and will not purport to grant to any
          third party the right to use the name "Morgan Stanley Dean Witter" for
          any purpose.  MSDW, or any corporate affiliate of MSDW, may use or
          grant to others the right to use the name "Morgan Stanley Dean
          Witter," or any combination or abbreviation thereof, as all or a
          portion of a corporate or business name or for any commercial purpose,
          including a grant of such right to any other investment company.  At
          the request of MSDW or any corporate affiliate of MSDW, the Trust will
          take such action as may be required to provide its consent to the use
          of the name "Morgan Stanley Dean Witter," or any combination or
          abbreviation thereof, by MSDW or any corporate affiliate of MSDW, or
          by any person to whom MSDW or a corporate affiliate of MSDW shall have
          granted the right to such use.  Upon the termination of any investment
          advisory agreement into which a corporate affiliate of MSDW and the
          Trust may enter, the Trust shall, upon request of MSDW or any
          corporate affiliate of MSDW, cease to use the name "Morgan Stanley
          Dean Witter" as a component of its name, and shall not use the name,
          or any combination or abbreviation thereof, as part of its name or for
          any other commercial purpose, and shall cause its officers, Trustees
          and Shareholders to take any and all actions which MSDW or any
          corporate affiliate of MSDW may request to effect the foregoing and to
          reconvey to MSDW any and all rights to such name."
          
     4. The Trustees of the Trust hereby reaffirm the Declaration, as amended,
in all respects.

     5.  This Amendment may be executed in more than one counterpart, each of
which shall be deemed an original, but all of which together shall constitute
one and the same document.


<PAGE>


IN WITNESS WHEREOF, the undersigned, the Trustees of the Trust, have executed
this instrument this 22nd day of June, 1998. 


/s/ Michael Bozic                       /s/ Manuel H. Johnson    
- -----------------                       ---------------------
Michael Bozic, as Trustee               Manuel H. Johnson, as Trustee   
and not individually                    and not individually
c/o Levitz Furniture Corp.              c/o Johnson Smick International Inc.
6111 Broken Sound Parkway, NW           1133 Connecticut Avenue, NW  
Boca Raton, FL  33487                   Washington, D.C.  20036



/s/ Charles A. Fiumefreddo              /s/ Michael E. Nugent    
- --------------------------              ---------------------
Charles A. Fiumefreddo, as Trustee      Michael E. Nugent, as Trustee
and not individually                    and not individually
Two World Trade Center                  c/o Triumph Capital, L.P.
New York, NY  10048                     237 Park Avenue
                                        New York, NY  10017



/s/ Edwin J. Garn                       /s/ Philip J. Purcell    
- -----------------                       ---------------------
Edwin J. Garn, as Trustee               Philip J. Purcell, as Trustee
and not individually                    and not individually
c/o Huntsman Corporation                1585 Broadway
500 Huntsman Way                        New York, NY  10036
Salt Lake City, UT  84111



/s/ John R. Haire                       /s/ John L. Schroeder    
- -----------------                       ---------------------
John R. Haire, as Trustee               John L. Schroeder, as Trustee
and not individually                    and not individually
Two World Trade Center                  c/o Gordon Altman Butowsky Weitzen
New York, NY  10048                       Shalov & Wein 
                                        Counsel to the Independent Trustees
                                        114 West 47th Street
                                        New York, NY 10036


/s/ Wayne E. Hedien 
- -------------------
Wayne E. Hedien, as Trustee
and not individually
c/o Gordon Altman Butowsky Weitzen
  Shalov & Wein 
Counsel to the Independent Trustees
114 West 47th Street
New York, NY  10036



<PAGE>




     STATE OF NEW YORK   )
                         )ss.:
     COUNTY OF NEW YORK  )
          
          
     On this 22nd day of June, 1998, MICHAEL BOZIC, CHARLES A. FIUMEFREDDO,
     EDWIN J. GARN, JOHN R. HAIRE, WAYNE E. HEDIEN, MANUEL H. JOHNSON,
     MICHAEL E. NUGENT, PHILIP J. PURCELL and JOHN L. SCHROEDER, known to
     me to be the individuals described in and who executed the foregoing
     instrument, personally appeared before me and they severally
     acknowledged the foregoing instrument to be their free act and deed.
          
          
          
          
          
                                             /s/ Marilyn K. Cranney    
                                             ----------------------
                                                      Notary Public
          
          
     MARILYN K. CRANNEY
     NOTARY PUBLIC, State of New York
     No. 24-4795538
     Qualified in Kings County
     Commission Expires May 31, 1999

<PAGE>
                                                                 
                                    BY-LAWS

                                       OF

                   DEAN WITTER INTERMEDIATE INCOME SECURITIES

                  AMENDED AND RESTATED AS OF OCTOBER 23, 1997


                                   ARTICLE I

                                  DEFINITIONS

     The terms "COMMISSION," "DECLARATION," "DISTRIBUTOR," "INVESTMENT
ADVISER," "MAJORITY SHAREHOLDER VOTE," "1940 ACT," "SHAREHOLDER," "SHARES,"
"TRANSFER AGENT," "TRUST," "TRUST PROPERTY," AND "TRUSTEES" have the respective
meanings given them in the Declaration of Trust of Dean Witter Intermediate
Income Securities dated September 1, 1988.


                                   ARTICLE II

                                    OFFICES

     SECTION 2.1. PRINCIPAL OFFICE. Until changed by the Trustees, the
principal office of the Trust in the Commonwealth of Massachusetts shall be in
the City of Boston, County of Suffolk.

     SECTION 2.2. OTHER OFFICES. In addition to its principal office in the
Commonwealth of Massachusetts, the Trust may have an office or offices in the
City of New York, State of New York, and at such other places within and
without the Commonwealth as the Trustees may from time to time designate or the
business of the Trust may require.


                                  ARTICLE III

                            SHAREHOLDERS' MEETINGS

     SECTION 3.1. PLACE OF MEETINGS. Meetings of Shareholders shall be held at
such place, within or without the Commonwealth of Massachusetts, as may be
designated from time to time by the Trustees.

     SECTION 3.2. MEETINGS. Meetings of Shareholders of the Trust shall be held
whenever called by the Trustees or the President of the Trust and whenever
election of a Trustee or Trustees by Shareholders is required by the provisions
of Section 16(a) of the 1940 Act, for that purpose. Meetings of Shareholders
shall also be called by the Secretary upon the written request of the holders
of Shares entitled to vote not less than twenty-five percent (25%) of all the
votes entitled to be cast at such meeting, except to the extent otherwise
required by Section 16(c) of the 1940 Act, as made applicable to the Trust by
the provisions of Section 2.3 of the Declaration. Such request shall state the
purpose or purposes of such meeting and the matters proposed to be acted on
thereat. Except to the extent otherwise required by Section 16(c) of the 1940
Act, as made applicable to the Trust by the provisions of Section 2.3 of the
Declaration, the Secretary shall inform such Shareholders of the reasonable
estimated cost of preparing and mailing such notice of the meeting, and upon
payment to the Trust of such costs, the Secretary shall give notice stating the
purpose or purposes of the meeting to all entitled to vote at such meeting. No
meeting need be called upon the request of the holders of Shares entitled to
cast less than a majority of all votes entitled to be cast at such meeting, to
consider any matter which is substantially the same as a matter voted upon at
any meeting of Shareholders held during the preceding twelve months.

     SECTION 3.3. NOTICE OF MEETINGS. Written or printed notice of every
Shareholders' meeting stating the place, date, and purpose or purposes thereof,
shall be given by the Secretary not less than ten (10) nor more than ninety
(90) days before such meeting to each Shareholder entitled to vote at such
meeting. Such notice shall be deemed to be given when deposited in the United
States mail, postage prepaid, directed to the Shareholder at his address as it
appears on the records of the Trust.


<PAGE>

     SECTION 3.4 QUORUM AND ADJOURNMENT OF MEETINGS. Except as otherwise
provided by law, by the Declaration or by these By-Laws, at all meetings of
Shareholders, the holders of a majority of the Shares issued and outstanding
and entitled to vote thereat, present in person or represented by proxy, shall
be requisite and shall constitute a quorum for the transaction of business. In
the absence of a quorum, the Shareholders present or represented by proxy and
entitled to vote thereat shall have the power to adjourn the meeting from time
to time. The Shareholders present in person or represented by proxy at any
meeting and entitled to vote thereat also shall have the power to adjourn the
meeting from time to time if the vote required to approve or reject any
proposal described in the original notice of such meeting is not obtained (with
proxies being voted for or against adjournment consistent with the votes for
and against the proposal for which the required vote has not been obtained).
The affirmative vote of the holders of a majority of the Shares then present in
person or represented by proxy shall be required to adjourn any meeting. Any
adjourned meeting may be reconvened without further notice or change in record
date. At any reconvened meeting at which a quorum shall be present, any
business may be transacted that might have been transacted at the meeting as
originally called.


     SECTION 3.5. VOTING RIGHTS, PROXIES. At each meeting of Shareholders, each
holder of record of Shares entitled to vote thereat shall be entitled to one
vote in person or by proxy, executed in writing by the Shareholder or his duly
authorized attorney-in-fact, for each Share of beneficial interest of the Trust
and for the fractional portion of one vote for each fractional Share entitled
to vote so registered in his name on the records of the Trust on the date fixed
as the record date for the determination of Shareholders entitled to vote at
such meeting. No proxy shall be valid after eleven months from its date, unless
otherwise provided in the proxy. At all meetings of Shareholders, unless the
voting is conducted by inspectors, all questions relating to the qualification
of voters and the validity of proxies and the acceptance or rejection of votes
shall be decided by the chairman of the meeting. Pursuant to a resolution of a
majority of the Trustees, proxies may be solicited in the name of one or more
Trustees or Officers of the Trust.

     SECTION 3.6. VOTE REQUIRED. Except as otherwise provided by law, by the
Declaration of Trust, or by these By-Laws, at each meeting of Shareholders at
which a quorum is present, all matters shall be decided by Majority Shareholder
Vote.

     SECTION 3.7. INSPECTORS OF ELECTION. In advance of any meeting of
Shareholders, the Trustees may appoint Inspectors of Election to act at the
meeting or any adjournment thereof. If Inspectors of Election are not so
appointed, the chairman of any meeting of Shareholders may, and on the request
of any Shareholder or his proxy shall, appoint Inspectors of Election of the
meeting. In case any person appointed as Inspector fails to appear or fails or
refuses to act, the vacancy may be filled by appointment made by the Trustees
in advance of the convening of the meeting or at the meeting by the person
acting as chairman. The Inspectors of Election shall determine the number of
Shares outstanding, the Shares represented at the meeting, the existence of a
quorum, the authenticity, validity and effect of proxies, shall receive votes,
ballots or consents, shall hear and determine all challenges and questions in
any way arising in connection with the right to vote, shall count and tabulate
all votes or consents, determine the results, and do such other acts as may be
proper to conduct the election or vote with fairness to all Shareholders. On
request of the chairman of the meeting, or of any Shareholder or his proxy, the
Inspectors of Election shall make a report in writing of any challenge or
question or matter determined by them and shall execute a certificate of any
facts found by them.

     SECTION 3.8. INSPECTION OF BOOKS AND RECORDS. Shareholders shall have such
rights and procedures of inspection of the books and records of the Trust as
are granted to Shareholders under the Corporations and Associations Law of the
State of Maryland.

     SECTION 3.9. ACTION BY SHAREHOLDERS WITHOUT MEETING. Except as otherwise
provided by law, the provisions of these By-Laws relating to notices and
meetings to the contrary notwithstanding, any action required or permitted to
be taken at any meeting of Shareholders may be taken without a meeting if a
majority of the Shareholders entitled to vote upon the action consent to the
action in writing and such consents are filed with the records of the Trust.
Such consent shall be treated for all purposes as a vote taken at a meeting of
Shareholders.


                                       2
<PAGE>

     SECTION 3.10. PRESENCE AT MEETINGS. Presence at meetings of shareholders
requires physical attendance by the shareholder or his or her proxy at the
meeting site and does not encompass attendance by telephonic or other
electronic means.


                                   ARTICLE IV

                                   TRUSTEES

     SECTION 4.1. MEETINGS OF THE TRUSTEES. The Trustees may in their
discretion provide for regular or special meetings of the Trustees. Regular
meetings of the Trustees may be held at such time and place as shall be
determined from time to time by the Trustees without further notice. Special
meetings of the Trustees may be called at any time by the President and shall
be called by the President or the Secretary upon the written request of any two
(2) Trustees.

     SECTION 4.2. NOTICE OF SPECIAL MEETINGS. Written notice of special
meetings of the Trustees, stating the place, date and time thereof, shall be
given not less than two (2) days before such meeting to each Trustee,
personally, by telegram, by mail, or by leaving such notice at his place of
residence or usual place of business. If mailed, such notice shall be deemed to
be given when deposited in the United States mail, postage prepaid, directed to
the Trustee at his address as it appears on the records of the Trust. Subject
to the provisions of the 1940 Act, notice or waiver of notice need not specify
the purpose of any special meeting.

     SECTION 4.3. TELEPHONE MEETINGS. Subject to the provisions of the 1940
Act, any Trustee, or any member or members of any committee designated by the
Trustees, may participate in a meeting of the Trustees, or any such committee,
as the case may be, by means of a conference telephone or similar
communications equipment if all persons participating in the meeting can hear
each other at the same time. Participation in a meeting by these means
constitutes presence in person at the meeting.

     SECTION 4.4. QUORUM, VOTING AND ADJOURNMENT OF MEETINGS. At all meetings
of the Trustees, a majority of the Trustees shall be requisite to and shall
constitute a quorum for the transaction of business. If a quorum is present,
the affirmative vote of a majority of the Trustees present shall be the act of
the Trustees, unless the concurrence of a greater proportion is expressly
required for such action by law, the Declaration or these By-Laws. If at any
meeting of the Trustees there be less than a quorum present, the Trustees
present thereat may adjourn the meeting from time to time, without notice other
than announcement at the meeting, until a quorum shall have been obtained.

     SECTION 4.5. ACTION BY TRUSTEES WITHOUT MEETING. The provisions of these
By-Laws covering notices and meetings to the contrary notwithstanding, and
except as required by law, any action required or permitted to be taken at any
meeting of the Trustees may be taken without a meeting if a consent in writing
setting forth the action shall be signed by all of the Trustees entitled to
vote upon the action and such written consent is filed with the minutes of
proceedings of the Trustees.

     SECTION 4.6. EXPENSES AND FEES. Each Trustee may be allowed expenses, if
any, for attendance at each regular or special meeting of the Trustees, and
each Trustee who is not an officer or employee of the Trust or of its
investment manager or underwriter or of any corporate affiliate of any of said
persons shall receive for services rendered as a Trustee of the Trust such
compensation as may be fixed by the Trustees. Nothing herein contained shall be
construed to preclude any Trustee from serving the Trust in any other capacity
and receiving compensation therefor.

     SECTION 4.7.  EXECUTION OF INSTRUMENTS AND DOCUMENTS AND SIGNING OF CHECKS
AND OTHER OBLIGATIONS AND TRANSFERS. All instruments, documents and other
papers shall be executed in the name and on behalf of the Trust and all checks,
notes, drafts and other obligations for the payment of money by the Trust shall
be signed, and all transfer of securities standing in the name of the Trust
shall be executed, by the Chairman, the President, any Vice President or the
Treasurer or by any one or more officers or agents of the Trust as shall be
designated for that purpose by vote of the Trustees; notwithstanding the above,
nothing in this Section 4.7 shall be deemed to preclude the electronic
authorization, by designated persons, of the Trust's Custodian (as described
herein in Section 9.1) to transfer assets of the Trust, as provided for herein
in Section 9.1.


                                       3
<PAGE>

     SECTION 4.8. INDEMNIFICATION OF TRUSTEES, OFFICERS, EMPLOYEES AND
AGENTS. (a) The Trust shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending, or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative
(other than an action by or in the right of the Trust) by reason of the fact
that he is or was a Trustee, officer, employee, or agent of the Trust. The
indemnification shall be against expenses, including attorneys' fees,
judgments, fines, and amounts paid in settlement, actually and reasonably
incurred by him in connection with the action, suit, or proceeding, if he acted
in good faith and in a manner he reasonably believed to be in or not opposed to
the best interests of the Trust, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe his conduct was unlawful. The
termination of any action, suit or proceeding by judgment, order, settlement,
conviction, or upon a plea of nolo contendere or its equivalent, shall not, of
itself, create a presumption that the person did not act in good faith and in a
manner which he reasonably believed to be in or not opposed to the best
interests of the Trust, and, with respect to any criminal action or proceeding,
had reasonable cause to believe that his conduct was unlawful.

     (b) The Trust shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action or
suit by or on behalf of the Trust to obtain a judgment or decree in its favor
by reason of the fact that he is or was a Trustee, officer, employee, or agent
of the Trust. The indemnification shall be against expenses, including
attorneys' fees actually and reasonably incurred by him in connection with the
defense or settlement of the action or suit, if he acted in good faith and in a
manner he reasonably believed to be in or not opposed to the best interests of
the Trust; except that no indemnification shall be made in respect of any
claim, issue, or matter as to which the person has been adjudged to be liable
for negligence or misconduct in the performance of his duty to the Trust,
except to the extent that the court in which the action or suit was brought, or
a court of equity in the county in which the Trust has its principal office,
determines upon application that, despite the adjudication of liability but in
view of all circumstances of the case, the person is fairly and reasonably
entitled to indemnity for those expenses which the court shall deem proper,
provided such Trustee, officer, employee or agent is not adjudged to be liable
by reason of his willful misfeasance, bad faith, gross negligence or reckless
disregard of the duties involved in the conduct of his office.

     (c) To the extent that a Trustee, officer, employee, or agent of the Trust
has been successful on the merits or otherwise in defense of any action, suit
or proceeding referred to in subsection (a) or (b) or in defense of any claim,
issue or matter therein, he shall be indemnified against expenses, including
attorneys' fees, actually and reasonably incurred by him in connection
therewith.

     (d) (1) Unless a court orders otherwise, any indemnification under
subsections (a) or (b) of this section may be made by the Trust only as
authorized in the specific case after a determination that indemnification of
the Trustee, officer, employee, or agent is proper in the circumstances because
he has met the applicable standard of conduct set forth in subsections (a) or
(b).

        (2) The determination shall be made:

           (i) By the Trustees, by a majority vote of a quorum which consists of
     Trustees who were not parties to the action, suit or proceeding; or

           (ii) If the required quorum is not obtainable, or if a quorum of
     disinterested Trustees so directs, by independent legal counsel in a
     written opinion; or

           (iii) By the Shareholders.

      (3) Notwithstanding any provision of this Section 4.8, no person shall
    be entitled to indemnification for any liability, whether or not there is
    an adjudication of liability, arising by reason of willful misfeasance,
    bad faith, gross negligence, or reckless disregard of duties as described
    in Section 17(h) and (i) of the Investment Company Act of 1940 ("disabling
    conduct"). A person shall be deemed not liable by reason of disabling
    conduct if, either:

         (i) a final decision on the merits is made by a court or other body
    before whom the proceeding was brought that the person to be indemnified
    ("indemnitee") was not liable by reason of disabling conduct; or


                                       4
<PAGE>

      (ii) in the absence of such a decision, a reasonable determination,
    based upon a review of the facts, that the indemnitee was not liable by
    reason of disabling conduct, is made by either--

          (A) a majority of a quorum of Trustees who are neither "interested
        persons" of the Trust, as defined in Section 2(a)(19) of the Investment
        Company Act of 1940, nor parties to the action, suit or proceeding, or

          (B) an independent legal counsel in a written opinion.

     (e) Expenses, including attorneys' fees, incurred by a Trustee, officer,
employee or agent of the Trust in defending a civil or criminal action, suit or
proceeding may be paid by the Trust in advance of the final disposition thereof
if:

         (1) authorized in the specific case by the Trustees; and

         (2) the Trust receives an undertaking by or on behalf of the Trustee,
    officer, employee or agent of the Trust to repay the advance if it is not
    ultimately determined that such person is entitled to be indemnified by
    the Trust; and

         (3) either, (i) such person provides a security for his undertaking,
or

           (ii) the Trust is insured against losses by reason of any lawful
        advances, or

           (iii) a determination, based on a review of readily available facts,
        that there is reason to believe that such person ultimately will be
        found entitled to indemnification, is made by either--

              (A) a majority of a quorum which consists of Trustees who are
            neither "interested persons" of the Trust, as defined in Section
            2(a)(19) of the 1940 Act, nor parties to the action, suit or
            proceeding, or

              (B) an independent legal counsel in a written opinion.

     (f) The indemnification provided by this Section shall not be deemed
exclusive of any other rights to which a person may be entitled under any
by-law, agreement, vote of Shareholders or disinterested Trustees or otherwise,
both as to action in his official capacity and as to action in another capacity
while holding the office, and shall continue as to a person who has ceased to
be a Trustee, officer, employee, or agent and inure to the benefit of the
heirs, executors and administrators of such person; provided that no person may
satisfy any right of indemnity or reimbursement granted herein or to which he
may be otherwise entitled except out of the property of the Trust, and no
Shareholder shall be personally liable with respect to any claim for indemnity
or reimbursement or otherwise.

     (g) The Trust may purchase and maintain insurance on behalf of any person
who is or was a Trustee, officer, employee, or agent of the Trust, against any
liability asserted against him and incurred by him in any such capacity, or
arising out of his status as such. However, in no event will the Trust purchase
insurance to indemnify any officer or Trustee against liability for any act for
which the Trust itself is not permitted to indemnify him.

     (h) Nothing contained in this Section shall be construed to protect any
Trustee or officer of the Trust against any liability to the Trust or to its
security holders to which he would otherwise be subject by reason of willful
misfeasance, bad faith, gross negligence or reckless disregard of the duties
involved in the conduct of his office.


                                   ARTICLE V

                                  COMMITTEES

     SECTION 5.1. EXECUTIVE AND OTHER COMMITTEES. The Trustees, by resolution
adopted by a majority of the Trustees, may designate an Executive Committee
and/or committees, each committee to consist of two (2) or more of the Trustees
of the Trust and may delegate to such committees, in the intervals between
meetings of the Trustees, any or all of the powers of the Trustees in the
management of the business and affairs of the Trust. In the absence of any
member of any such committee, the members thereof present


                                       5
<PAGE>

at any meeting, whether or not they constitute a quorum, may appoint a Trustee
to act in place of such absent member. Each such committee shall keep a record
of its proceedings.

     The Executive Committee and any other committee shall fix its own rules or
procedure, but the presence of at least fifty percent (50%) of the members of
the whole committee shall in each case be necessary to constitute a quorum of
the committee and the affirmative vote of the majority of the members of the
committee present at the meeting shall be necessary to take action.

     All actions of the Executive Committee shall be reported to the Trustees
at the meeting thereof next succeeding to the taking of such action.

     SECTION 5.2. ADVISORY COMMITTEE. The Trustees may appoint an advisory
committee which shall be composed of persons who do not serve the Trust in any
other capacity and which shall have advisory functions with respect to the
investments of the Trust but which shall have no power to determine that any
security or other investment shall be purchased, sold or otherwise disposed of
by the Trust. The number of persons constituting any such advisory committee
shall be determined from time to time by the Trustees. The members of any such
advisory committee may receive compensation for their services and may be
allowed such fees and expenses for the attendance at meetings as the Trustees
may from time to time determine to be appropriate.

     SECTION 5.3. COMMITTEE ACTION WITHOUT MEETING. The provisions of these
By-Laws covering notices and meetings to the contrary notwithstanding, and
except as required by law, any action required or permitted to be taken at any
meeting of any Committee of the Trustees appointed pursuant to Section 5.1 of
these By-Laws may be taken without a meeting if a consent in writing setting
forth the action shall be signed by all members of the Committee entitled to
vote upon the action and such written consent is filed with the records of the
proceedings of the Committee.


                                   ARTICLE VI

                                   OFFICERS

     SECTION 6.1. EXECUTIVE OFFICERS. The executive officers of the Trust shall
be a Chairman, a President, one or more Vice Presidents, a Secretary and a
Treasurer. The Chairman shall be selected from among the Trustees but none of
the other executive officers need be a Trustee. Two or more offices, except
those of President and any Vice President, may be held by the same person, but
no officer shall execute, acknowledge or verify any instrument in more than one
capacity. The executive officers of the Trust shall be elected annually by the
Trustees and each executive officer so elected shall hold office until his
successor is elected and has qualified.

     SECTION 6.2. OTHER OFFICERS AND AGENTS. The Trustees may also elect one or
more Assistant Vice Presidents, Assistant Secretaries and Assistant Treasurers
and may elect, or may delegate to the President the power to appoint, such
other officers and agents as the Trustees shall at any time or from time to
time deem advisable.

     SECTION 6.3. TERM AND REMOVAL AND VACANCIES. Each officer of the Trust
shall hold office until his successor is elected and has qualified. Any officer
or agent of the Trust may be removed by the Trustees whenever, in their
judgment, the best interests of the Trust will be served thereby, but such
removal shall be without prejudice to the contractual rights, if any, of the
person so removed.

     SECTION 6.4. COMPENSATION OF OFFICERS. The compensation of officers and
agents of the Trust shall be fixed by the Trustees, or by the President to the
extent provided by the Trustees with respect to officers appointed by the
President.

     SECTION 6.5. POWER AND DUTIES. All officers and agents of the Trust, as
between themselves and the Trust, shall have such authority and perform such
duties in the management of the Trust as may be provided in or pursuant to
these By-Laws, or to the extent not so provided, as may be prescribed by the
Trustees; provided, that no rights of any third party shall be affected or
impaired by any such By-Law or resolution of the Trustees unless he has
knowledge thereof.


                                       6
<PAGE>

     SECTION 6.6. THE CHAIRMAN. The Chairman shall preside at all meetings of
the Shareholders and of the Trustees, shall be a signatory on all Annual and
Semi-Annual Reports as may be sent to shareholders, and he shall perform such
other duties as the Trustees may from time to time prescribe.


     SECTION 6.7. THE PRESIDENT. (a) The President shall be the chief executive
officer of the Trust; he shall have general and active management of the
business of the Trust, shall see that all orders and resolutions of the Board
of Trustees are carried into effect, and, in connection therewith, shall be
authorized to delegate to one or more Vice Presidents such of his powers and
duties at such times and in such manner as he may deem advisable.


     (b) In the absence of the Chairman, the President shall preside at all
meetings of the shareholders and the Board of Trustees; and he shall perform
such other duties as the Board of Trustees may from time to time prescribe.


     SECTION 6.8. THE VICE PRESIDENTS. The Vice Presidents shall be of such
number and shall have such titles as may be determined from time to time by the
Trustees. The Vice President, or, if there be more than one, the Vice
Presidents in the order of their seniority as may be determined from time to
time by the Trustees or the President, shall, in the absence or disability of
the President, exercise the powers and perform the duties of the President, and
he or they shall perform such other duties as the Trustees or the President may
from time to time prescribe.


     SECTION 6.9. THE ASSISTANT VICE PRESIDENTS. The Assistant Vice President,
or, if there be more than one, the Assistant Vice Presidents, shall perform
such duties and have such powers as may be assigned them from time to time by
the Trustees or the President.


     SECTION 6.10. THE SECRETARY. The Secretary shall attend all meetings of
the Trustees and all meetings of the Shareholders and record all the
proceedings of the meetings of the Shareholders and of the Trustees in a book
to be kept for that purpose, and shall perform like duties for the standing
committees when required. He shall give, or cause to be given, notice of all
meetings of the Shareholders and special meetings of the Trustees, and shall
perform such other duties and have such powers as the Trustees, or the
President, may from time to time prescribe. He shall keep in safe custody the
seal of the Trust and affix or cause the same to be affixed to any instrument
requiring it, and, when so affixed, it shall be attested by his signature or by
the signature of an Assistant Secretary.


     SECTION 6.11. THE ASSISTANT SECRETARIES. The Assistant Secretary, or, if
there be more than one, the Assistant Secretaries in the order determined by
the Trustees or the President, shall, in the absence or disability of the
Secretary, perform the duties and exercise the powers of the Secretary and
shall perform such duties and have such other powers as the Trustees or the
President may from time to time prescribe.


     SECTION 6.12. THE TREASURER. The Treasurer shall be the chief financial
officer of the Trust. He shall keep or cause to be kept full and accurate
accounts of receipts and disbursements in books belonging to the Trust, and he
shall render to the Trustees and the President, whenever any of them require
it, an account of his transactions as Treasurer and of the financial condition
of the Trust; and he shall perform such other duties as the Trustees, or the
President, may from time to time prescribe.


     SECTION 6.13. THE ASSISTANT TREASURERS. The Assistant Treasurer, or, if
there shall be more than one, the Assistant Treasurers in the order determined
by the Trustees or the President, shall, in the absence or disability of the
Treasurer, perform the duties and exercise the powers of the Treasurer and
shall perform such other duties and have such other powers as the Trustees, or
the President, may from time to time prescribe.


     SECTION 6.14. DELEGATION OF DUTIES. Whenever an officer is absent or
disabled, or whenever for any reason the Trustees may deem it desirable, the
Trustees may delegate the powers and duties of an officer or officers to any
other officer or officers or to any Trustee or Trustees.


                                       7
<PAGE>

                                  ARTICLE VII

                          DIVIDENDS AND DISTRIBUTIONS

     Subject to any applicable provisions of law and the Declaration, dividends
and distributions upon the Shares may be declared at such intervals as the
Trustees may determine, in cash, in securities or other property, or in Shares,
from any sources permitted by law, all as the Trustees shall from time to time
determine.

     Inasmuch as the computation of net income and net profits from the sales
of securities or other properties for federal income tax purposes may vary from
the computation thereof on the records of the Trust, the Trustees shall have
power, in their discretion, to distribute as income dividends and as capital
gain distributions, respectively, amounts sufficient to enable the Trust to
avoid or reduce liability for federal income taxes.


                                  ARTICLE VIII

                            CERTIFICATES OF SHARES

     SECTION 8.1. CERTIFICATES OF SHARES. Certificates for Shares of each
series or class of Shares shall be in such form and of such design as the
Trustees shall approve, subject to the right of the Trustees to change such
form and design at any time or from time to time, and shall be entered in the
records of the Trust as they are issued. Each such certificate shall bear a
distinguishing number; shall exhibit the holder's name and certify the number
of full Shares owned by such holder; shall be signed by or in the name of the
Trust by the President, or a Vice President, and countersigned by the Secretary
or an Assistant Secretary or the Treasurer and an Assistant Treasurer of the
Trust; shall be sealed with the seal; and shall contain such recitals as may be
required by law. Where any certificate is signed by a Transfer Agent or by a
Registrar, the signature of such officers and the seal may be facsimile,
printed or engraved. The Trust may, at its option, determine not to issue a
certificate or certificates to evidence Shares owned of record by any
Shareholder.

     In case any officer or officers who shall have signed, or whose facsimile
signature or signatures shall appear on, any such certificate or certificates
shall cease to be such officer or officers of the Trust, whether because of
death, resignation or otherwise, before such certificate or certificates shall
have been delivered by the Trust, such certificate or certificates shall,
nevertheless, be adopted by the Trust and be issued and delivered as though the
person or persons who signed such certificate or certificates or whose
facsimile signature or signatures shall appear therein had not ceased to be
such officer or officers of the Trust.

     No certificate shall be issued for any share until such share is fully
paid.

     SECTION 8.2. LOST, STOLEN, DESTROYED AND MUTILATED CERTIFICATES. The
Trustees may direct a new certificate or certificates to be issued in place of
any certificate or certificates theretofore issued by the Trust alleged to have
been lost, stolen or destroyed, upon satisfactory proof of such loss, theft, or
destruction; and the Trustees may, in their discretion, require the owner of
the lost, stolen or destroyed certificate, or his legal representative, to give
to the Trust and to such Registrar, Transfer Agent and/or Transfer Clerk as may
be authorized or required to countersign such new certificate or certificates,
a bond in such sum and of such type as they may direct, and with such surety or
sureties, as they may direct, as indemnity against any claim that may be
against them or any of them on account of or in connection with the alleged
loss, theft or destruction of any such certificate.


                                   ARTICLE IX

                                   CUSTODIAN

     SECTION 9.1. APPOINTMENT AND DUTIES. The Trust shall at times employ a
bank or trust company having capital, surplus and undivided profits of at least
five million dollars ($5,000,000) as custodian with authority as its agent, but
subject to such restrictions, limitations and other requirements, if any, as
may be contained in these By-Laws and the 1940 Act:


                                       8
<PAGE>

      (1) to receive and hold the securities owned by the Trust and deliver
    the same upon written or electronically transmitted order;

      (2) to receive and receipt for any moneys due to the Trust and deposit
    the same in its own banking department or elsewhere as the Trustees may
    direct;

      (3) to disburse such funds upon orders or vouchers;

all upon such basis of compensation as may be agreed upon between the Trustees
and the custodian. If so directed by a Majority Shareholder Vote, the custodian
shall deliver and pay over all property of the Trust held by it as specified in
such vote.

     The Trustees may also authorize the custodian to employ one or more
sub-custodians from time to time to perform such of the acts and services of
the custodian and upon such terms and conditions as may be agreed upon between
the custodian and such sub-custodian and approved by the Trustees.

     SECTION 9.2. CENTRAL CERTIFICATE SYSTEM. Subject to such rules,
regulations and orders as the Commission may adopt, the Trustees may direct the
custodian to deposit all or any part of the securities owned by the Trust in a
system for the central handling of securities established by a national
securities exchange or a national securities association registered with the
Commission under the Securities Exchange Act of 1934, or such other person as
may be permitted by the Commission, or otherwise in accordance with the 1940
Act, pursuant to which system all securities of any particular class or series
of any issuer deposited within the system are treated as fungible and may be
transferred or pledged by bookkeeping entry without physical delivery of such
securities, provided that all such deposits shall be subject to withdrawal only
upon the order of the Trust.


                                   ARTICLE X

                               WAIVER OF NOTICE

     Whenever any notice of the time, place or purpose of any meeting of
Shareholders, Trustees, or of any committee is required to be given in
accordance with law or under the provisions of the Declaration or these
By-Laws, a waiver thereof in writing, signed by the person or persons entitled
to such notice and filed with the records of the meeting, whether before or
after the holding thereof, or actual attendance at the meeting of Shareholders,
Trustees or committee, as the case may be, in person, shall be deemed
equivalent to the giving of such notice to such person.


                                   ARTICLE XI

                                 MISCELLANEOUS

     SECTION 11.1. LOCATION OF BOOKS AND RECORDS. The books and records of the
Trust may be kept outside the Commonwealth of Massachusetts at such place or
places as the Trustees may from time to time determine, except as otherwise
required by law.

     SECTION 11.2 RECORD DATE. The Trustees may fix in advance a date as the
record date for the purpose of determining the Shareholders entitled to (i)
receive notice of, or to vote at, any meeting of Shareholders, or (ii) receive
payment of any dividend or the allotment of any rights, or in order to make a
determination of Shareholders for any other proper purpose. The record date, in
any case, shall not be more than one hundred eighty (180) days, and in the case
of a meeting of Shareholders not less than ten (10) days, prior to the date on
which such meeting is to be held or the date on which such other particular
action requiring determination of Shareholders is to be taken, as the case may
be. In the case of a meeting of Shareholders, the meeting date set forth in the
notice to Shareholders accompanying the proxy statement shall be the date used
for purposes of calculating the 180 day or 10 day period, and any adjourned
meeting may be reconvened without a change in record date. In lieu of fixing a
record date, the Trustees may provide that the transfer books shall be closed
for a stated period but not to exceed, in any case, twenty (20) days. If the
transfer books are closed for the purpose of determining Shareholders entitled
to notice of a vote at a meeting of Shareholders, such books shall be closed
for at least ten (10) days immediately preceding the meeting.


                                       9
<PAGE>

     SECTION 11.3. SEAL. The Trustees shall adopt a seal, which shall be in
such form and shall have such inscription thereon as the Trustees may from time
to time provide. The seal of the Trust may be affixed to any document, and the
seal and its attestation may be lithographed, engraved or otherwise printed on
any document with the same force and effect as if it had been imprinted and
attested manually in the same manner and with the same effect as if done by a
Massachusetts business corporation under Massachusetts law.


     SECTION 11.4. FISCAL YEAR. The fiscal year of the Trust shall end on such
date as the Trustees may by resolution specify, and the Trustees may by
resolution change such date for future fiscal years at any time and from time
to time.


     SECTION 11.5. ORDERS FOR PAYMENT OF MONEY. All orders or instructions for
the payment of money of the Trust, and all notes or other evidences of
indebtedness issued in the name of the Trust, shall be signed by such officer
or officers or such other person or persons as the Trustees may from time to
time designate, or as may be specified in or pursuant to the agreement between
the Trust and the bank or trust company appointed as Custodian of the
securities and funds of the Trust.


                                  ARTICLE XII

                      COMPLIANCE WITH FEDERAL REGULATIONS


     The Trustees are hereby empowered to take such action as they may deem to
be necessary, desirable or appropriate so that the Trust is or shall be in
compliance with any federal or state statute, rule or regulation with which
compliance by the Trust is required.


                                  ARTICLE XIII

                                  AMENDMENTS


     These By-Laws may be amended, altered, or repealed, or new By-Laws may be
adopted, (a) by a Majority Shareholder Vote, or (b) by the Trustees; provided,
however, that no By-Law may be amended, adopted or repealed by the Trustees if
such amendment, adoption or repeal requires, pursuant to law, the Declaration,
or these By-Laws, a vote of the Shareholders. The Trustees shall in no event
adopt By-Laws which are in conflict with the Declaration, and any apparent
inconsistency shall be construed in favor of the related provisions in the
Declaration.


                                  ARTICLE XIV

                             DECLARATION OF TRUST


     The Declaration of Trust establishing Dean Witter Intermediate Income
Securities, dated September 1, 1988, a copy of which is on file in the office
of the Secretary of the Commonwealth of Massachusetts, provides that the name
Dean Witter Intermediate Income Securities 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 Dean Witter Intermediate
Income Securities shall be held to any personal liability, nor shall resort be
had to their private property for the satisfaction of any obligation or claim
or otherwise, in connection with the affairs of said Dean Witter Intermediate
Income Securities, but the Trust Estate only shall be liable.


                                       10

<PAGE>
                        INVESTMENT MANAGEMENT AGREEMENT
 
    AGREEMENT made as of the 31st day of May, 1997, and amended as of April 30,
1998, by and between Dean Witter Intermediate Income Securities, an
unincorporated business trust organized under the laws of the Commonwealth of
Massachusetts (hereinafter called the "Fund"), and Dean Witter InterCapital
Inc., a Delaware corporation (hereinafter called the "Investment Manager"):
 
    WHEREAS, The Fund is engaged in business as an open-end management
investment company and is registered as such under the Investment Company Act of
1940, as amended (the "Act"); and
 
    WHEREAS, The Investment Manager is registered as an investment adviser under
the Investment Advisers Act of 1940, and engages in the business of acting as
investment adviser; and
 
    WHEREAS, The Fund desires to retain the Investment Manager to render
management and investment advisory services in the manner and on the terms and
conditions hereinafter set forth; and
 
    WHEREAS, The Investment Manager desires to be retained to perform services
on said terms and conditions:
 
    Now, Therefore, this Agreement
 
                              W I T N E S S E T H:
 
that in consideration of the premises and the mutual covenants hereinafter
contained, the Fund and the Investment Manager agree as follows:
 
     1. The Fund hereby retains the Investment Manager to act as investment
manager of the Fund and, subject to the supervision of the Trustees, to
supervise the investment activities of the Fund as hereinafter set forth.
Without limiting the generality of the foregoing, the Investment Manager shall
obtain and evaluate such information and advice relating to the economy,
securities and commodities markets and securities and commodities as it deems
necessary or useful to discharge its duties hereunder; shall continuously manage
the assets of the Fund in a manner consistent with the investment objectives and
policies of the Fund; shall determine the securities and commodities to be
purchased, sold or otherwise disposed of by the Fund and the timing of such
purchases, sales and dispositions; and shall take such further action, including
the placing of purchase and sale orders on behalf of the Fund, as the Investment
Manager shall deem necessary or appropriate. The Investment Manager shall also
furnish to or place at the disposal of the Fund such of the information,
evaluations, analyses and opinions formulated or obtained by the Investment
Manager in the discharge of its duties as the Fund may, from time to time,
reasonably request.
 
     2. The Investment Manager shall, at its own expense, maintain such staff
and employ or retain such personnel and consult with such other persons as it
shall from time to time determine to be necessary or useful to the performance
of its obligations under this Agreement. Without limiting the generality of the
foregoing, the staff and personnel of the Investment Manager shall be deemed to
include persons employed or otherwise retained by the Investment Manager to
furnish statistical and other factual data, advice regarding economic factors
and trends, information with respect to technical and scientific developments,
and such other information, advice and assistance as the Investment Manager may
desire. The Investment Manager shall, as agent for the Fund, maintain the Fund's
records and books of account (other than those maintained by the Fund's transfer
agent, registrar, custodian and other agencies). All such books and records so
maintained shall be the property of the Fund and, upon request therefor, the
Investment Manager shall surrender to the Fund such of the books and records so
requested.
 
     3. The Fund will, from time to time, furnish or otherwise make available to
the Investment Manager such financial reports, proxy statements and other
information relating to the business and affairs of the Fund as the Investment
Manager may reasonably require in order to discharge its duties and obligations
hereunder.
 
     4. The Investment Manager shall bear the cost of rendering the 
investment management and supervisory services to be performed by it under 
this Agreement, and shall, at its own expense, pay the compensation of the 
officers and employees, if any, of the Fund, who are also directors, officers 
or employees of the Investment Manager, and provide such office space, 
facilities and equipment and such clerical help and 

<PAGE>

bookkeeping services as the Fund shall reasonably require in the conduct of 
its business. The Investment Manager shall also bear the cost of telephone 
service, heat, light, power and other utilities provided to the Fund.
 
     5. The Fund assumes and shall pay or cause to be paid all other expenses of
the Fund, including without limitation: fees pursuant to any plan of
distribution that the Fund may adopt; the charges and expenses of any registrar,
any custodian or depository appointed by the Fund for the safekeeping of its
cash, portfolio securities or commodities and other property, and any stock
transfer or dividend agent or agents appointed by the Fund; brokers' commissions
chargeable to the Fund in connection with portfolio transactions to which the
Fund is a party; all taxes, including securities or commodities issuance and
transfer taxes, and fees payable by the Fund to federal, state or other
governmental agencies; the cost and expense of engraving or printing
certificates representing shares of the Fund; all costs and expenses in
connection with the registration and maintenance of registration of the Fund and
its shares with the Securities and Exchange Commission and various states and
other jurisdictions (including filing fees and legal fees and disbursements of
counsel); the cost and expense of printing, including typesetting, and
distributing prospectuses and statements of additional information of the Fund
and supplements thereto to the Fund's shareholders; all expenses of
shareholders' and Trustees' meetings and of preparing, printing and mailing
proxy statements and reports to shareholders; fees and travel expenses of
Trustees or members of any advisory board or committee who are not employees of
the Investment Manager or any corporate affiliate of the Investment Manager; all
expenses incident to the payment of any dividend, distribution, withdrawal or
redemption, whether in shares or in cash; charges and expenses of any outside
service used for pricing of the Fund's shares; charges and expenses of legal
counsel, including counsel to the Trustees of the Fund who are not interested
persons (as defined in the Act) of the Fund or the Investment Manager, and of
independent accountants, in connection with any matter relating to the Fund;
membership dues of industry associations; interest payable on Fund borrowings;
postage; insurance premiums on property or personnel (including officers and
Trustees) of the Fund which inure to its benefit; extraordinary expenses
(including but not limited to legal claims and liabilities and litigation costs
and any indemnification related thereto); and all other charges and costs of the
Fund's operation unless otherwise explicitly provided herein.
 
     6. For the services to be rendered, the facilities furnished, and the
expenses assumed by the Investment Manager, the Fund shall pay to the Investment
Manager monthly compensation determined by applying the following annual rates
to the Fund's daily net assets: 0.60% of daily net assets up to $500 million;
0.50% of the next $250 million; 0.40% of the next $250 million; and 0.30% of
daily net assets over $1 billion. Except as hereinafter set forth, compensation
under this Agreement shall be calculated and accrued daily and the amounts of
the daily accruals shall be paid monthly. Such calculations shall be made by
applying 1/365ths of the annual rates to the Fund's net assets each day
determined as of the close of business on that day or the last previous business
day. If this Agreement becomes effective subsequent to the first day of a month
or shall terminate before the last day of a month, compensation for that part of
the month this Agreement is in effect shall be prorated in a manner consistent
with the calculation of the fees as set forth above.
 
    Subject to the provisions of paragraph 7 hereof, payment of the Investment
Manager's compensation for the preceding month shall be made as promptly as
possible after completion of the computations contemplated by paragraph 7
hereof.
 
     7. In the event the operating expenses of the Fund, including amounts 
payable to the Investment Manager pursuant to paragraph 6 hereof, for any 
fiscal year ending on a date on which this Agreement is in effect, exceed the 
expense limitations applicable to the Fund imposed by state securities laws 
or regulations thereunder, as such limitations may be raised or lowered from 
time to time, the Investment Manager shall reduce its management fee to the 
extent of such excess and, if required, pursuant to any such laws or 
regulations, will reimburse the Fund for annual operating expenses in excess 
of any expense limitation that may be applicable; provided, however, there 
shall be excluded from such expenses the amount of any interest, taxes, 
brokerage commissions, distribution fees and extraordinary expenses 
(including but not limited to legal claims and liabilities and litigation 
costs and any indemnification related thereto) paid or payable by the Fund. 
Such reduction, if any, shall be computed and accrued daily, shall be settled 
on a 

                                      2
<PAGE>


monthly basis, and shall be based upon the expense limitation applicable to 
the Fund as at the end of the last business day of the month. Should two or 
more such expense limitations be applicable as at the end of the last 
business day of the month, that expense limitation which results in the 
largest reduction in the Investment Manager's fee shall be applicable.
 
    For purposes of this provision, should any applicable expense limitation be
based upon the gross income of the Fund, such gross income shall include, but
not be limited to, interest on debt securities in the Fund's portfolio accrued
to and including the last day of the Fund's fiscal year, and dividends declared
on equity securities in the Fund's portfolio, the record dates for which fall on
or prior to the last day of such fiscal year, but shall not include gains from
the sale of securities.
 
     8. The Investment Manager will use its best efforts in the supervision and
management of the investment activities of the Fund, but in the absence of
willful misfeasance, bad faith, gross negligence or reckless disregard of its
obligations hereunder, the Investment Manager shall not be liable to the Fund or
any of its investors for any error of judgment or mistake of law or for any act
or omission by the Investment Manager or for any losses sustained by the Fund or
its investors.
 
     9. Nothing contained in this Agreement shall prevent the Investment Manager
or any affiliated person of the Investment Manager from acting as investment
adviser or manager for any other person, firm or corporation and shall not in
any way bind or restrict the Investment Manager or any such affiliated person
from buying, selling or trading any securities or commodities for their own
accounts or for the account of others for whom they may be acting. Nothing in
this Agreement shall limit or restrict the right of any Trustee, officer or
employee of the Investment Manager to engage in any other business or to devote
his or her time and attention in part to the management or other aspects of any
other business whether of a similar or dissimilar nature.
 
    10. This Agreement shall remain in effect until April 30, 1999 and from year
to year thereafter provided such continuance is approved at least annually by
the vote of holders of a majority, as defined in the Investment Company Act of
1940, as amended (the "Act"), of the outstanding voting securities of the Fund
or by the Trustees of the Fund; provided that in either event such continuance
is also approved annually by the vote of a majority of the Trustees of the Fund
who are not parties to this Agreement or "interested persons" (as defined in the
Act) of any such party, which vote must be cast in person at a meeting called
for the purpose of voting on such approval; provided, however, that (a) the Fund
may, at any time and without the payment of any penalty, terminate this
Agreement upon thirty days' written notice to the Investment Manager, either by
majority vote of the Trustees of the Fund or by the vote of a majority of the
outstanding voting securities of the Fund; (b) this Agreement shall immediately
terminate in the event of its assignment (to the extent required by the Act and
the rules thereunder) unless such automatic terminations shall be prevented by
an exemptive order of the Securities and Exchange Commission; and (c) the
Investment Manager may terminate this Agreement without payment of penalty on
thirty days' written notice to the Fund. Any notice under this Agreement shall
be given in writing, addressed and delivered, or mailed post-paid, to the other
party at the principal office of such party.
 
    11. This Agreement may be amended by the parties without the vote or consent
of the shareholders of the Fund to supply any omission, to cure, correct or
supplement any ambiguous, defective or inconsistent provision hereof, or if they
deem it necessary to conform this Agreement to the requirements of applicable
federal laws or regulations, but neither the Fund nor the Investment Manager
shall be liable for failing to do so.
 
    12. This Agreement shall be construed in accordance with the laws of the
State of New York and the applicable provisions of the Act. To the extent the
applicable law of the State of New York, or any of the provisions herein,
conflicts with the applicable provisions of the Act, the latter shall control.

    13. The Investment Manager and the Fund each agree that the name "Dean
Witter," which comprises a component of the Fund's name, is a property right of
Dean Witter Reynolds Inc. The Fund agrees and consents that (i) it will only use
the name "Dean Witter" as a component of its name and for no other purpose, (ii)
it will not purport to grant to any third party the right to use the name "Dean
Witter" for any purpose, (iii) the Investment Manager or its parent, Morgan
Stanley Dean Witter & Co., or any corporate 

                                      3
<PAGE>


affiliate of the Investment Manager's parent, may use or grant to others the 
right to use the name "Dean Witter," or any combination or abbreviation 
thereof, as all or a portion of a corporate or business name or for any 
commercial purpose, including a grant of such right to any other investment 
company, (iv) at the request of the Investment Manager or its parent, the 
Fund will take such action as may be required to provide its consent to the 
use of the name "Dean Witter," or any combination or abbreviation thereof, by 
the Investment Manager or its parent or any corporate affiliate of the 
Investment Manager's parent, or by any person to whom the Investment Manager 
or its parent or any corporate affiliate of the Investment Manager's parent 
shall have granted the right to such use, and (v) upon the termination of any 
investment advisory agreement into which the Investment Manager and the Fund 
may enter, or upon termination of affiliation of the Investment Manager with 
its parent, the Fund shall, upon request by the Investment Manager or its 
parent, cease to use the name "Dean Witter" as a component of its name, and 
shall not use the name, or any combination or abbreviation thereof, as a part 
of its name or for any other commercial purpose, and shall cause its 
officers, Trustees and shareholders to take any and all actions which the 
Investment Manager or its parent may request to effect the foregoing and to 
reconvey to the Investment Manager or its parent any and all rights to such 
name.
 
    14. The Declaration of Trust establishing Dean Witter Intermediate Income
Securities, dated September 1, 1988, 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 Dean
Witter Intermediate Income Securities 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 Dean Witter Intermediate
Income Securities shall be held to any personal liability, nor shall resort be
had to their private property for the satisfaction of any obligation or claim or
otherwise, in connection with the affairs of said Dean Witter Intermediate
Income Securities, but the Trust Estate only shall be liable.

    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement, as amended, on April 30, 1998 in New York, New York.
 

                                     DEAN WITTER INTERMEDIATE INCOME SECURITIES
 
                                     By:        /s/ Barry Fink
                                        .......................................
 
Attest:
 
        /s/ Frank Bruttomesso
 ..................................
 
                                     DEAN WITTER INTERCAPITAL INC.
 
                                     By:        /s/ Charles A. Fiumefreddo
                                        .......................................
 
Attest:
 
        /s/ Marilyn K. Cranney
 ..................................
 
                                       4

<PAGE>
                        MORGAN STANLEY DEAN WITTER FUNDS
                             DISTRIBUTION AGREEMENT
 
    AGREEMENT made as of this 28th day of July, 1997, and amended as of June 22,
1998, between each of the open-end investment companies to which Morgan Stanley
Dean Witter Advisors Inc. acts as investment manager, that are listed on
Schedule A, as may be amended from time to time (each, a "Fund" and
collectively, the "Funds"), and Morgan Stanley Dean Witter Distributors Inc., a
Delaware corporation (the "Distributor").
 
                              W I T N E S S E T H:
 
    WHEREAS, each Fund is registered as an open-end investment company under the
Investment Company Act of 1940, as amended (the "1940 Act"), and it is in the
interest of each Fund to offer its shares for sale continuously, and
 
    WHEREAS, each Fund and the Distributor wish to enter into an agreement with
each other with respect to the continuous offering of each Fund's transferable
shares, of $0.01 par value (the "Shares"), to commence on the date listed above,
in order to promote the growth of each Fund and facilitate the distribution of
its shares.
 
    NOW, THEREFORE, the parties agree as follows:
 
    SECTION 1.  APPOINTMENT OF THE DISTRIBUTOR.
 
    (a) Each Fund hereby appoints the Distributor as the principal underwriter
and distributor of the Fund to sell Shares to the public on the terms set forth
in this Agreement and that Fund's prospectus and the Distributor hereby accepts
such appointment and agrees to act hereunder. Each Fund, during the term of this
Agreement, shall sell Shares to the Distributor upon the terms and conditions
set forth herein.
 
    (b) The Distributor agrees to purchase Shares, as principal for its own
account, from each Fund and to sell Shares as principal to investors, and
securities dealers, including Dean Witter Reynolds Inc. ("DWR"), an affiliate of
the Distributor, upon the terms described herein and in that Fund's prospectus
(the "Prospectus") and statement of additional information included in the
Fund's registration statement (the "Registration Statement") most recently filed
from time to time with the Securities and Exchange Commission (the "SEC") and
effective under the Securities Act of 1933, as amended (the "1933 Act"), and the
1940 Act or as the Prospectus may be otherwise amended or supplemented and filed
with the SEC pursuant to Rule 497 under the 1933 Act.
 
    SECTION 2.  EXCLUSIVE NATURE OF DUTIES.  The Distributor shall be the
exclusive principal underwriter and distributor of each Fund, except that the
exclusive rights granted to the Distributor to sell the Shares shall not apply
to Shares issued by each Fund: (i) in connection with the merger or
consolidation of any other investment company or personal holding company with
the Fund or the acquisition by purchase or otherwise of all (or substantially
all) the assets or the outstanding shares of any such company by the Fund; (ii)
pursuant to reinvestment of dividends or capital gains distributions; or (iii)
pursuant to the reinstatement privilege afforded redeeming shareholders.
 
    SECTION 3.  PURCHASE OF SHARES FROM EACH FUND.  The Shares are offered in
four classes (each, a "Class"), as described in the Prospectus, as amended or
supplemented from time to time.
 
    (a) The Distributor shall have the right to buy from each Fund the Shares of
the particular class needed, but not more than the Shares needed (except for
clerical errors in transmission), to fill unconditional orders for Shares of the
applicable class placed with the Distributor by investors or securities dealers.
The price which the Distributor shall pay for the Shares so purchased from the
Fund shall be the net asset value, determined as set forth in the Prospectus,
used in determining the public offering price on which such orders were based.
 
    (b) The Shares are to be resold by the Distributor at the public offering
price of Shares of the applicable class as set forth in the Prospectus, to
investors or to securities dealers, including DWR, who
 
                                       1
<PAGE>
have entered into selected dealer agreements with the Distributor upon the terms
and conditions set forth in Section 7 hereof ("Selected Dealers").
 
    (c) Each Fund shall have the right to suspend the sale of the Shares at
times when redemption is suspended pursuant to the conditions set forth in
Section 4(f) hereof. Each Fund shall also have the right to suspend the sale of
the Shares if trading on the New York Stock Exchange shall have been suspended,
if a banking moratorium shall have been declared by federal or New York
authorities, or if there shall have been some other extraordinary event which,
in the judgment of a Fund, makes it impracticable to sell its Shares.
 
    (d) Each Fund, or any agent of a Fund designated in writing by the Fund,
shall be promptly advised of all purchase orders for Shares received by the
Distributor. Any order may be rejected by a Fund; provided, however, that a Fund
will not arbitrarily or without reasonable cause refuse to accept orders for the
purchase of Shares. The Distributor will confirm orders upon their receipt, and
each Fund (or its agent) upon receipt of payment therefor and instructions will
deliver share certificates for such Shares or a statement confirming the
issuance of Shares. Payment shall be made to the Fund in New York Clearing House
funds. The Distributor agrees to cause such payment and such instructions to be
delivered promptly to the Fund (or its agent).
 
    (e) With respect to Shares sold by any Selected Dealer, the Distributor is
authorized to direct each Fund's transfer agent to receive instructions directly
from the Selected Dealer on behalf of the Distributor as to registration of
Shares in the names of investors and to confirm issuance of the Shares to such
investors. The Distributor is also authorized to instruct the transfer agent to
receive payment directly from the Selected Dealer on behalf of the Distributor,
for prompt transmittal to each Fund's custodian, of the purchase price of the
Shares. In such event the Distributor shall obtain from the Selected Dealer and
maintain a record of such registration instructions and payments.
 
    SECTION 4.  REPURCHASE OR REDEMPTION OF SHARES.
 
    (a) Any of the outstanding Shares of a Fund may be tendered for redemption
at any time, and each Fund agrees to redeem its Shares so tendered in accordance
with the applicable provisions set forth in its Prospectus. The price to be paid
to redeem the Shares shall be equal to the net asset value determined as set
forth in the Prospectus less any applicable contingent deferred sales charge
("CDSC"). Upon any redemption of Shares the Fund shall pay the total amount of
the redemption price in New York Clearing House funds in accordance with
applicable provisions of the Prospectus.
 
    (b) The redemption by a Fund of any of its Class A Shares purchased by or
through the Distributor will not affect the applicable front-end sales charge
secured by the Distributor or any Selected Dealer in the course of the original
sale, except that if any Class A Shares are tendered for redemption within seven
business days after the date of the confirmation of the original purchase, the
right to the applicable front-end sales charge shall be forfeited by the
Distributor and the Selected Dealer which sold such Shares.
 
    (c) The proceeds of any redemption of Class A, Class B or Class C Shares
shall be paid by each Fund as follows: (i) any applicable CDSC shall be paid to
the Distributor or to the Selected Dealer, or, when applicable, pursuant to the
Rules of the Association of the National Association of Securities Dealers, Inc.
("NASD"), retained by the Fund and (ii) the balance shall be paid to the
redeeming shareholders, in each case in accordance with applicable provisions of
its Prospectus in New York Clearing House funds. The Distributor is authorized
to direct a Fund to pay directly to the Selected Dealer any CDSC payable by a
Fund to the Distributor in respect of Class A, Class B, or Class C Shares sold
by the Selected Dealer to the redeeming shareholders.
 
    (d) The Distributor is authorized, as agent for the Fund, to repurchase
Shares, represented by a share certificate which is delivered to any office of
the Distributor in accordance with applicable provisions set forth in each
Fund's Prospectus. The Distributor shall promptly transmit to the transfer agent
of the Fund for redemption all Shares so delivered. The Distributor shall be
responsible for the accuracy of instructions transmitted to the Fund's transfer
agent in connection with all such repurchases.
 
                                       2
<PAGE>
    (e) The Distributor is authorized, as agent for each Fund, to repurchase
Shares held in a shareholder's account with a Fund for which no share
certificate has been issued, upon the telephonic request of the shareholders, or
at the discretion of the Distributor. The Distributor shall promptly transmit to
the transfer agent of the Fund, for redemption, all such orders for repurchase
of Shares. Payment for Shares repurchased may be made by a Fund to the
Distributor for the account of the shareholder. The Distributor shall be
responsible for the accuracy of instructions transmitted to the Fund's transfer
agent in connection with all such repurchases.
 
    (f) Redemption of its Shares or payment by a Fund may be suspended at times
when the New York Stock Exchange is closed, when trading on said Exchange is
restricted, when an emergency exists as a result of which disposal by a Fund of
securities owned by it is not reasonably practicable or it is not reasonably
practicable for a Fund fairly to determine the value of its net assets, or
during any other period when the SEC, by order, so permits.
 
    (g) With respect to its Shares tendered for redemption or repurchase by any
Selected Dealer on behalf of its customers, the Distributor is authorized to
instruct the transfer agent of a Fund to accept orders for redemption or
repurchase directly from the Selected Dealer on behalf of the Distributor and to
instruct the Fund to transmit payments for such redemptions and repurchases
directly to the Selected Dealer on behalf of the Distributor for the account of
the shareholder. The Distributor shall obtain from the Selected Dealer, and
shall maintain, a record of such orders. The Distributor is further authorized
to obtain from the Fund, and shall maintain, a record of payment made directly
to the Selected Dealer on behalf of the Distributor.
 
    SECTION 5.  DUTIES OF THE FUND.
 
    (a) Each Fund shall furnish to the Distributor copies of all information,
financial statements and other papers which the Distributor may reasonably
request for use in connection with the distribution of its Shares, including one
certified copy, upon request by the Distributor, of all financial statements
prepared by the Fund and examined by independent accountants. Each Fund shall,
at the expense of the Distributor, make available to the Distributor such number
of copies of its Prospectus as the Distributor shall reasonably request.
 
    (b) Each Fund shall take, from time to time, but subject to the necessary
approval of its shareholders, all necessary action to fix the number of its
authorized Shares and to register Shares under the 1933 Act, to the end that
there will be available for sale such number of Shares as investors may
reasonably be expected to purchase.
 
    (c) Each Fund shall use its best efforts to pay the filing fees for an
appropriate number of its Shares to be sold under the securities laws of such
states as the Distributor and the Fund may approve. Any qualification to sell
its Shares in a state may be withheld, terminated or withdrawn by a Fund at any
time in its discretion. As provided in Section 8(c) hereof, such filing fees
shall be paid by the Fund. The Distributor shall furnish any information and
other material relating to its affairs and activities as may be required by a
Fund in connection with the sale of its Shares in any state.
 
    (d) Each Fund shall, at the expense of the Distributor, furnish, in
reasonable quantities upon request by the Distributor, copies of its annual and
interim reports.
 
    SECTION 6.  DUTIES OF THE DISTRIBUTOR.
 
    (a) The Distributor shall sell shares of each Fund through DWR and may sell
shares through other securities dealers and its own Financial Advisors, and
shall devote reasonable time and effort to promote sales of the Shares, but
shall not be obligated to sell any specific number of Shares. The services of
the Distributor hereunder are not exclusive and it is understood that the
Distributor may act as principal underwriter for other registered investment
companies, so long as the performance of its obligations hereunder is not
impaired thereby. It is also understood that Selected Dealers, including DWR,
may also sell shares for other registered investment companies.
 
                                       3
<PAGE>
    (b) Neither the Distributor nor any Selected Dealer shall give any
information or make any representations, other than those contained in the
Registration Statement or related Prospectus and any sales literature
specifically approved by the appropriate Fund.
 
    (c) The Distributor agrees that it will at all times comply with the
applicable terms and limitations of the Rules of the Association of the NASD.
 
    SECTION 7.  SELECTED DEALERS AGREEMENTS.
 
    (a) The Distributor shall have the right to enter into selected dealer
agreements with Selected Dealers for the sale of Shares. In making agreements
with Selected Dealers, the Distributor shall act only as principal and not as
agent for a Fund. Shares sold to Selected Dealers shall be for resale by such
dealers only at the public offering price set forth in the Prospectus. With
respect to Class A Shares, in such agreement the Distributor shall have the
right to fix the portion of the applicable front-end sales charge which may be
allocated to the Selected Dealers.
 
    (b) Within the United States, the Distributor shall offer and sell Shares
only to Selected Dealers that are members in good standing of the NASD.
 
    (c) The Distributor shall adopt and follow procedures, as approved by each
Fund, for the confirmation of sales of its Shares to investors and Selected
Dealers, the collection of amounts payable by investors and Selected Dealers on
such sales, and the cancellation of unsettled transactions, as may be necessary
to comply with the requirements of the NASD, as such requirements may from time
to time exist.
 
    SECTION 8.  PAYMENT OF EXPENSES.
 
    (a) Each Fund shall bear all costs and expenses of the Fund, including fees
and disbursements of legal counsel including counsel to the Directors/Trustees
of each Fund who are not interested persons (as defined in the 1940 Act) of the
Fund or the Distributor, and independent accountants, in connection with the
preparation and filing of any required Registration Statements and Prospectuses
and all amendments and supplements thereto, and the expense of preparing,
printing, mailing and otherwise distributing prospectuses and statements of
additional information, annual or interim reports or proxy materials to
shareholders.
 
    (b) The Distributor shall bear all expenses incurred by it in connection
with its duties and activities under this Agreement including the payment to
Selected Dealers of any sales commissions, service fees and other expenses for
sales of a Fund's Shares (except such expenses as are specifically undertaken
herein by a Fund) incurred or paid by Selected Dealers, including DWR. The
Distributor shall bear the costs and expenses of preparing, printing and
distributing any supplementary sales literature used by the Distributor or
furnished by it for use by Selected Dealers in connection with the offering of
the Shares for sale. Any expenses of advertising incurred in connection with
such offering will also be the obligation of the Distributor. It is understood
and agreed that, so long as a Fund's Plan of Distribution pursuant to Rule 12b-1
under the 1940 Act ("Rule 12b-1 Plan") continues in effect, any expenses
incurred by the Distributor hereunder may be paid in accordance with the terms
of such Rule 12b-1 Plan.
 
    (c) Each Fund shall pay the filing fees, and, if necessary or advisable in
connection therewith, bear the cost and expense of qualifying each Fund as a
broker or dealer, in such states of the United States or other jurisdictions as
shall be selected by the Fund and the Distributor pursuant to Section 5(c)
hereof and the cost and expenses payable to each such state for continuing to
offer Shares therein until the Fund decides to discontinue selling Shares
pursuant to Section 5(c) hereof.
 
    SECTION 9.  INDEMNIFICATION.
 
    (a) Each Fund shall indemnify and hold harmless the Distributor and each
person, if any, who controls the Distributor against any loss, liability, claim,
damage or expense (including the reasonable cost of investigating or defending
any alleged loss, liability, claim, damage or expense and reasonable counsel
fees incurred in connection therewith) arising by reason of any person acquiring
any Shares, which may be based upon the 1933 Act, or on any other statute or at
common law, on the ground that the Registration Statement or related Prospectus
and Statement of Additional Information, as from time to time amended
 
                                       4
<PAGE>
and supplemented, or the annual or interim reports to shareholders of a Fund,
includes an untrue statement of a material fact or omits to state a material
fact required to be stated therein or necessary in order to make the statements
therein not misleading, unless such statement or omission was made in reliance
upon, and in conformity with, information furnished to the Fund in connection
therewith by or on behalf of the Distributor; provided, however, that in no case
(i) is the indemnity of a Fund in favor of the Distributor and any such
controlling persons to be deemed to protect the Distributor or any such
controlling persons thereof against any liability to a Fund or its security
holders to which the Distributor or any such controlling persons would otherwise
be subject by reason of willful misfeasance, bad faith or gross negligence in
the performance of its duties or by reason of reckless disregard of its
obligations and duties under this Agreement; or (ii) is a Fund to be liable
under its indemnity agreement contained in this paragraph with respect to any
claim made against the Distributor or any such controlling persons, unless the
Distributor or any such controlling persons, as the case may be, shall have
notified the Fund in writing within a reasonable time after the summons or other
first legal process giving information of the nature of the claim shall have
been served upon the Distributor or uch controlling persons (or after the
Distributor or such controlling persons shall have received notice of such
service on any designated agent), but failure to notify the Fund of any such
claim shall not relieve it from any liability which it may have to the person
against whom such action is brought otherwise than on account of its indemnity
agreement contained in this paragraph. Each Fund will be entitled to participate
at its own expense in the defense, or, if it so elects, to assume the defense,
of any such suit brought to enforce any such liability, but if a Fund elects to
assume the defense, such defense shall be conducted by counsel chosen by it and
satisfactory to the Distributor or such controlling person or persons, defendant
or defendants in the suit. In the event the Fund elects to assume the defense of
any such suit and retain such counsel, the Distributor or such controlling
person or persons, defendant or defendants in the suit, shall bear the fees and
expenses of any additional counsel retained by them, but, in case the Fund does
not elect to assume the defense of any such suit, it will reimburse the
Distributor or such controlling person or persons, defendant or defendants in
the suit, for the reasonable fees and expenses of any counsel retained by them.
Each Fund shall promptly notify the Distributor of the commencement of any
litigation or proceedings against it or any of its officers or
Directors/Trustees in connection with the issuance or sale of the Shares.
 
    (b) (i) The Distributor shall indemnify and hold harmless each Fund and each
of its Directors/ Trustees and officers and each person, if any, who controls
the Fund against any loss, liability, claim, damage, or expense described in the
indemnity contained in subsection (a) of this Section, but only with respect to
statements or omissions made in reliance upon, and in conformity with,
information furnished to a Fund in writing by or on behalf of the Distributor
for use in connection with the Registration Statement or related Prospectus and
Statement of Additional Information, as from time to time amended, or the annual
or interim reports to shareholders.
 
        (ii) The Distributor shall indemnify and hold harmless each Fund and
each Fund's transfer agent, individually and in its capacity as the Fund's
transfer agent, from and against any claims, damages and liabilities which arise
as a result of actions taken pursuant to instructions from, or on behalf of, the
Distributor to: (1) redeem all or a part of shareholder accounts in the Fund
pursuant to Section 4(g) hereof and pay the proceeds to, or as directed by, the
Distributor for the account of each shareholder whose Shares are so redeemed;
and (2) register Shares in the names of investors, confirm the issuance thereof
and receive payment therefor pursuant to Section 3(e) hereof.
 
        (iii) In case any action shall be brought against a Fund or any person
so indemnified by this Section 9(b) in respect of which indemnity may be sought
against the Distributor, the Distributor shall have the rights and duties given
to a Fund, and the Fund and each person so indemnified shall have the rights and
duties given to the Distributor, by the provisions of subsection (a) of this
Section 9.
 
    (c) If the indemnification provided for in this Section 9 is unavailable or
insufficient to hold harmless an indemnified party under subsection (a) or (b)
above in respect of any losses, claims, damages, liabilities or expenses (or
actions in respect thereof) referred to herein, then each indemnifiying party
shall contribute to the amount paid or payable by such indemnified party as a
result of such losses, claims, damages, liabilities or expenses (or actions in
respect thereof) in such proportion as is appropriate to reflect the relative
benefits received by a Fund on the one hand and the Distributor on the other
from the
 
                                       5
<PAGE>
offering of the Shares. If, however, the allocation provided by the immediately
preceding sentence is not permitted by applicable law, then each indemnifying
party shall contribute to such amount paid or payable by such indemnified party
in such proportion as is appropriate to reflect not only such relative benefits
but also the relative fault of a Fund on the one hand and the Distributor on the
other in connection with the statements or omissions which resulted in such
losses, claims, damages, liabilities or expenses (or actions in respect
thereof), as well as any other relevant equitable considerations. The relative
benefits received by a Fund on the one hand and the Distributor on the other
shall be deemed to be in the same proportion as the total net proceeds from the
offering (before deducting expenses) received by the Fund bear to the total
compensation received by the Distributor, in each case as set forth in the
Prospectus. The relative fault shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by a Fund or the Distributor and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission. Each Fund and the Distributor agree that it would not be
just and equitable ifcontribution were determined by pro rata allocation or by
any other method of allocation which does not take into account the equitable
considerations referred to above. The amount paid or payable by an indemnified
party as a result of the losses, claims, damages, liabilities or expenses (or
actions in respect thereof) referred to above shall be deemed to include any
legal or other expenses reasonably incurred by such indemnified party in
connection with investigating or defending any such claim. Notwithstanding the
provisions of this subsection (c), the Distributor shall not be required to
contribute any amount in excess of the amount by which the total price at which
the Shares distributed by it to the public were offered to the public exceeds
the amount of any damages which it has otherwise been required to pay by reason
of such untrue or alleged untrue statement or omission or alleged omission. No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the 1933 Act) shall be entitled to contribution from any person who was
not guilty of such fraudulent misrepresentation.
 
    SECTION 10.  DURATION AND TERMINATION OF THIS AGREEMENT.  This Agreement
shall remain in force until April 30, 1999, and thereafter, but only so long as
such continuance is specifically approved at least annually by (i) the Board of
Directors/Trustees of each Fund, or by the vote of a majority of the outstanding
voting securities of the Fund, cast in person or by proxy, and (ii) a majority
of those Directors/ Trustees who are not parties to this Agreement or interested
persons of any such party and who have no direct or indirect financial interest
in this Agreement or in the operation of the Fund's Rule 12b-1 Plan or in any
agreement related thereto, cast in person at a meeting called for the purpose of
voting upon such approval.
 
    This Agreement may be terminated at any time without the payment of any
penalty, by the Directors/ Trustees of a Fund, by a majority of the
Directors/Trustees of a Fund who are not interested persons of the Fund and who
have no direct or indirect financial interest in this Agreement, or by vote of a
majority of the outstanding voting securities of a Fund, or by the Distributor,
on sixty days' written notice to the other party. This Agreement shall
automatically terminate in the event of its assignment.
 
    The terms "vote of a majority of the outstanding voting securities,"
"assignment" and "interested person," when used in this Agreement, shall have
the respective meanings specified in the 1940 Act.
 
    SECTION 11.  AMENDMENTS OF THIS AGREEMENT.  This Agreement may be amended by
the parties only if such amendment is specifically approved by (i) the
Directors/Trustees of a Fund, or by the vote of a majority of outstanding voting
securities of a Fund, and (ii) a majority of those Directors/Trustees of a Fund
who are not parties to this Agreement or interested persons of any such party
and who have no direct or indirect financial interest in this Agreement or in
any Agreement related to the Fund's Rule 12b-1 Plan, cast in person at a meeting
called for the purpose of voting on such approval.
 
    SECTION 12.  ADDITIONAL FUNDS.  If at any time another Fund desires to
appoint the Distributor as its principal underwriter and distributor under this
Agreement, it shall notify the Distributor in writing. If the Distributor is
willing to serve as the Fund's principal underwriter and distributor under this
Agreement, it shall notify the Fund in writing, whereupon such other Fund shall
become a Fund hereunder.
 
    SECTION 13.  GOVERNING LAW.  This Agreement shall be construed in accordance
with the law of the State of New York and the applicable provisions of the 1940
Act. To the extent the applicable law of the
 
                                       6
<PAGE>
State of New York, or any of the provisions herein, conflicts with the
applicable provisions of the 1940 Act, the latter shall control.
 
    SECTION 14.  PERSONAL LIABILITY.  With respect to any Fund that is organized
as an unincorporated business trust under the laws of the Commonwealth of
Massachusetts, its Declaration of the Trust (each, a "Declaration") is on file
in the office of the Secretary of the Commonwealth of Massachusetts. Each
Declaration 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 any Fund shall be held to
any personal liability, nor shall resort be had to their private property for
the satisfaction of any obligation or claim or otherwise, in connection with the
affairs of any Fund, but the Trust Estate only shall be liable.
 
    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement, as amended, on June 22, 1998 in New York, New York.
 
                                          ON BEHALF OF THE FUNDS SET FORTH ON
                                          SCHEDULE A, ATTACHED HERETO
 
                                          By: ..................................
 
                                          MORGAN STANLEY DEAN WITTER
                                          DISTRIBUTORS INC.
 
                                          By: ..................................
 
                                       7
<PAGE>
                        MORGAN STANLEY DEAN WITTER FUNDS
                             DISTRIBUTION AGREEMENT
                                   SCHEDULE A
                                AT JULY 22, 1998
 
<TABLE>
<S>        <C>
1)         Morgan Stanley Dean Witter American Value Fund
2)         Morgan Stanley Dean Witter Balanced Growth Fund
3)         Morgan Stanley Dean Witter Balanced Income Fund
4)         Morgan Stanley Dean Witter California Tax-Free Income Fund
5)         Morgan Stanley Dean Witter Capital Appreciation Fund
6)         Morgan Stanley Dean Witter Capital Growth Securities
7)         Morgan Stanley Dean Witter Competitive Edge Fund
8)         Morgan Stanley Dean Witter Convertible Securities Trust
9)         Morgan Stanley Dean Witter Developing Growth Securities Trust
10)        Morgan Stanley Dean Witter Diversified Income Trust
11)        Morgan Stanley Dean Witter Dividend Growth Securities Inc.
12)        Morgan Stanley Dean Witter Equity Fund
13)        Morgan Stanley Dean Witter European Growth Fund Inc.
14)        Morgan Stanley Dean Witter Federal Securities Trust
15)        Morgan Stanley Dean Witter Financial Services Trust
16)        Morgan Stanley Dean Witter Fund of Funds
17)        Dean Witter Global Asset Allocation Fund
18)        Morgan Stanley Dean Witter Global Dividend Growth Securities
19)        Morgan Stanley Dean Witter Global Utilities Fund
20)        Morgan Stanley Dean Witter Growth Fund
21)        Morgan Stanley Dean Witter Health Sciences Trust
22)        Morgan Stanley Dean Witter High Yield Securities Inc.
23)        Morgan Stanley Dean Witter Income Builder Fund
24)        Morgan Stanley Dean Witter Information Fund
25)        Morgan Stanley Dean Witter Intermediate Income Securities
26)        Morgan Stanley Dean Witter International SmallCap Fund
27)        Morgan Stanley Dean Witter Japan Fund
28)        Morgan Stanley Dean Witter Market Leader Trust
29)        Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
30)        Morgan Stanley Dean Witter Mid-Cap Growth Fund
31)        Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
32)        Morgan Stanley Dean Witter New York Tax-Free Income Fund
33)        Morgan Stanley Dean Witter Pacific Growth Fund Inc.
34)        Morgan Stanley Dean Witter Precious Metals and Minerals Trust
35)        Morgan Stanley Dean Witter Research Fund
36)        Morgan Stanley Dean Witter Special Value Fund
37)        Morgan Stanley Dean Witter S&P 500 Index Fund
38)        Morgan Stanley Dean Witter S&P 500 Select Fund
39)        Morgan Stanley Dean Witter Strategist Fund
40)        Morgan Stanley Dean Witter Tax-Exempt Securities Trust
41)        Morgan Stanley Dean Witter U.S. Government Securities Trust
42)        Morgan Stanley Dean Witter Utilities Fund
43)        Morgan Stanley Dean Witter Value-Added Market Series
44)        Morgan Stanley Dean Witter Value Fund
45)        Morgan Stanley Dean Witter Worldwide High Income Fund
46)        Morgan Stanley Dean Witter World Wide Income Trust
</TABLE>
 
                                       8

<PAGE>






                                AMENDED AND RESTATED
                       TRANSFER AGENCY AND SERVICE AGREEMENT

                                        with

                        MORGAN STANLEY DEAN WITTER TRUST FSB



















                                                                [open-end funds]
<PAGE>

                                 TABLE OF CONTENTS
     
     
                                                                          Page  
                                                                          ----  

Article 1      Terms of Appointment. . . . . . . . . . . . . . . . . . . .1

Article 2      Fees and Expenses . . . . . . . . . . . . . . . . . . . . .5

Article 3      Representations and Warranties of MSDW TRUST. . . . . . . .6

Article 4      Representations and Warranties of the Fund. . . . . . . . .7

Article 5      Duty of Care and Indemnification. . . . . . . . . . . . . .7

Article 6      Documents and Covenants of the Fund and MSDW TRUST. . . . 10

Article 7      Duration and Termination of Agreement . . . . . . . . . . 13

Article 8      Assignment. . . . . . . . . . . . . . . . . . . . . . . . 14

Article 9      Affiliations. . . . . . . . . . . . . . . . . . . . . . . 14

Article 10     Amendment . . . . . . . . . . . . . . . . . . . . . . . . 15

Article 11     Applicable Law. . . . . . . . . . . . . . . . . . . . . . 15

Article 12     Miscellaneous . . . . . . . . . . . . . . . . . . . . . . 15

Article 13     Merger of Agreement . . . . . . . . . . . . . . . . . . . 17

Article 14     Personal Liability. . . . . . . . . . . . . . . . . . . . 17



                                         -i-

<PAGE>

             AMENDED AND RESTATED TRANSFER AGENCY AND SERVICE AGREEMENT

          AMENDED AND RESTATED AGREEMENT made as of the 22nd day of June, 1998
by and between each of the Funds listed on the signature pages hereof, each of
such Funds acting severally on its own behalf and not jointly with any of such
other Funds (each such Fund hereinafter referred to as the "Fund"), each such
Fund having its principal office and place of business at Two World Trade
Center, New York, New York, 10048, and MORGAN STANLEY DEAN WITTER TRUST FSB
("MSDW TRUST"), a federally chartered savings bank, having its principal office
and place of business at Harborside Financial Center, Plaza Two, Jersey City,
New Jersey 07311.

          WHEREAS, the Fund desires to appoint MSDW TRUST as its transfer agent,
dividend disbursing agent and shareholder servicing agent and MSDW TRUST desires
to accept such appointment;

          NOW THEREFORE, in consideration of the mutual covenants herein
contained, the parties hereto agree as follows:

Article 1      TERMS OF APPOINTMENT; DUTIES OF MSDW TRUST

               1.1  Subject to the terms and conditions set forth in this
Agreement, the Fund hereby employs and appoints MSDW TRUST to act as, and MSDW
TRUST agrees to act as, the transfer agent for each series and class of shares
of the Fund, whether now or hereafter authorized or issued ("Shares"), dividend
disbursing agent and shareholder servicing agent in

                                         -1-
<PAGE>

connection with any accumulation, open-account or similar plans provided to the
holders of such Shares ("Shareholders") and set out in the currently effective
prospectus and statement of additional information ("prospectus") of the Fund,
including without limitation any periodic investment plan or periodic withdrawal
program.

               1.2    MSDW TRUST agrees that it will perform the following
services:

               (a)    In accordance with procedures established from time to
time by agreement between the Fund and MSDW TRUST, MSDW TRUST shall:

               (i)    Receive for acceptance, orders for the purchase of
Shares, and promptly deliver payment and appropriate documentation therefor to
the custodian of the assets of the Fund (the "Custodian");

               (ii)   Pursuant to purchase orders, issue the appropriate number
of Shares and issue certificates therefor or hold such Shares in book form in
the appropriate Shareholder account;

               (iii)  Receive for acceptance redemption requests and redemption
directions and deliver the appropriate documentation therefor to the Custodian;

               (iv)   At the appropriate time as and when it receives monies
paid to it by the Custodian with respect to any redemption, pay over or cause to
be paid over in the appropriate manner such monies as instructed by the
redeeming Shareholders;


                                         -2-
<PAGE>

               (v)    Effect transfers of Shares by the registered owners
thereof upon receipt of appropriate instructions;

               (vi)   Prepare and transmit payments for dividends and
distributions declared by the Fund;

               (vii)  Calculate any sales charges payable by a Shareholder on
purchases and/or redemptions of Shares of the Fund as such charges may be
reflected in the prospectus;

               (viii) Maintain records of account for and advise the Fund and
its Shareholders as to the foregoing; and

               (ix)   Record the issuance of Shares of the Fund and maintain
pursuant to Rule 17Ad-10(e) under the Securities Exchange Act of 1934 ("1934
Act") a record of the total number of Shares of the Fund which are authorized,
based upon data provided to it by the Fund, and issued and outstanding.  MSDW
TRUST shall also provide to the Fund on a regular basis the total number of
Shares that are authorized, issued and outstanding and shall notify the Fund in
case any proposed issue of Shares by the Fund would result in an overissue.  In
case any issue of Shares would result in an overissue, MSDW TRUST shall refuse
to issue such Shares and shall not countersign and issue any certificates
requested for such Shares.  When recording the issuance of Shares, MSDW TRUST
shall have no obligation to take cognizance of any Blue Sky laws relating to the
issue of sale of such Shares, which functions shall be the sole responsibility
of the Fund.

               (b)     In addition to and not in lieu of the services set forth
in the above paragraph (a), MSDW TRUST shall: 


                                         -3-
<PAGE>

               (i)    perform all of the customary services of a transfer
agent, dividend disbursing agent and, as relevant, shareholder servicing agent
in connection with dividend reinvestment, accumulation, open-account or similar
plans (including without limitation any periodic investment plan or periodic
withdrawal program), including but not limited to, maintaining all Shareholder
accounts, preparing Shareholder meeting lists, mailing proxies, receiving and
tabulating proxies, mailing shareholder reports and prospectuses to current
Shareholders, withholding taxes on U.S. resident and non-resident alien
accounts, preparing and filing appropriate forms required with respect to
dividends and distributions by federal tax authorities for all Shareholders,
preparing and mailing confirmation forms and statements of account to
Shareholders for all purchases and redemptions of Shares and other confirmable
transactions in Shareholder accounts, preparing and mailing activity statements
for Shareholders and providing Shareholder account information;

               (ii)   open any and all bank accounts which may be necessary or
appropriate in order to provide the foregoing services; and

               (iii)  provide a system that will enable the Fund to monitor the
total number of Shares sold in each State or other jurisdiction.

               (c)    In addition, the Fund shall:

               (i)    identify to MSDW TRUST in writing those transactions and
assets to be treated as exempt from Blue Sky reporting for each State; and 


                                         -4-
<PAGE>

               (ii)  verify the inclusion on the system prior to activation of
each State in which Fund shares may be sold and thereafter monitor the daily
purchases and sales for shareholders in each State.  The responsibility of MSDW
TRUST for the Fund's status under the securities laws of any State or other
jurisdiction is limited to the inclusion on the system of each State as to which
the Fund has informed MSDW TRUST that shares may be sold in compliance with
state securities laws and the reporting of purchases and sales in each such
State to the Fund as provided above and as agreed from time to time by the Fund
and MSDW TRUST.

               (d)   MSDW TRUST shall provide such additional services and
functions not specifically described herein as may be mutually agreed between
MSDW TRUST and the Fund.  Procedures applicable to such services may be
established from time to time by agreement between the Fund and MSDW TRUST.

Article 2      FEES AND EXPENSES

               2.1   For performance by MSDW TRUST pursuant to this Agreement,
each Fund agrees to pay MSDW TRUST an annual maintenance fee for each
Shareholder account and certain transactional fees, if applicable, as set out in
the respective fee schedule attached hereto as Schedule A.  Such fees and
out-of-pocket expenses and advances identified under Section 2.2 below may be
changed from time to time subject to mutual written agreement between the Fund
and MSDW TRUST.

               2.2   In addition to the fees paid under Section 2.1 above, the
Fund agrees to reimburse MSDW TRUST for out of pocket expenses in connection
with the services rendered


                                         -5-
<PAGE>

by MSDW TRUST hereunder.  In addition, any other expenses incurred by MSDW TRUST
at the request or with the consent of the Fund will be reimbursed by the Fund.

               2.3   The Fund agrees to pay all fees and reimbursable expenses
within a reasonable period of time following the mailing of the respective
billing notice.  Postage for mailing of dividends, proxies, Fund reports and
other mailings to all Shareholder accounts shall be advanced to MSDW TRUST by
the Fund upon request prior to the mailing date of such materials.

Article 3      REPRESENTATIONS AND WARRANTIES OF MSDW TRUST

               MSDW TRUST represents and warrants to the Fund that:

               3.1   It is a federally chartered savings bank whose principal
office is in New Jersey.

               3.2   It is and will remain registered with the U.S. Securities
and Exchange Commission ("SEC") as a Transfer Agent pursuant to the requirements
of Section 17A of the 1934 Act.

               3.3   It is empowered under applicable laws and by its charter
and By-Laws to enter into and perform this Agreement.

               3.4   All requisite corporate proceedings have been taken to
authorize it to enter into and perform this Agreement.

               3.5   It has and will continue to have access to the necessary
facilities, equipment and personnel to perform its duties and obligations under
this Agreement.


                                         -6-
<PAGE>

Article 4      REPRESENTATIONS AND WARRANTIES OF THE FUND

               The Fund represents and warrants to MSDW TRUST that:

               4.1   It is a corporation duly organized and existing and in
good standing under the laws of Delaware or Maryland or a trust duly organized
and existing and in good standing under the laws of Massachusetts, as the case
may be.

               4.2   It is empowered under applicable laws and by its Articles
of Incorporation or Declaration of Trust, as the case may be, and under its
By-Laws to enter into and perform this Agreement.

               4.3   All corporate proceedings necessary to authorize it to
enter into and perform this Agreement have been taken.

               4.4   It is an investment company registered with the SEC under
the Investment Company Act of 1940, as amended (the "1940 Act").

               4.5   A registration statement under the Securities Act of 1933
(the "1933 Act") is currently effective and will remain effective, and
appropriate state securities law filings have been made and will continue to be
made, with respect to all Shares of the Fund being offered for sale.

Article 5      DUTY OF CARE AND INDEMNIFICATION

               5.1   MSDW TRUST shall not be responsible for, and the Fund
shall indemnify and hold MSDW TRUST harmless from and against, any and all
losses, damages, costs,


                                         -7-
<PAGE>

charges, counsel fees, payments, expenses and liability arising out of or
attributable to:

               (a)   All actions of MSDW TRUST or its agents or subcontractors
required to be taken pursuant to this Agreement, provided that such actions are
taken in good faith and without negligence or willful misconduct.

               (b)   The Fund's refusal or failure to comply with the terms of
this Agreement, or which arise out of the Fund's lack of good faith, negligence
or willful misconduct or which arise out of breach of any representation or
warranty of the Fund hereunder.

               (c)   The reliance on or use by MSDW TRUST or its agents or
subcontractors of information, records and documents which (i) are received by
MSDW TRUST or its agents or subcontractors and furnished to it by or on behalf
of the Fund, and (ii) have been prepared and/or maintained by the Fund or any
other person or firm on behalf of the Fund.

               (d)   The reliance on, or the carrying out by MSDW TRUST or its
agents or subcontractors of, any instructions or requests of the Fund.

               (e)   The offer or sale of Shares in violation of any
requirement under the federal securities laws or regulations or the securities
or Blue Sky laws of any State or other jurisdiction that notice of offering of
such Shares in such State or other jurisdiction or in violation of any stop
order or other determination or ruling by any federal agency or any State or
other jurisdiction with respect to the offer or sale of such Shares in such
State or other jurisdiction.


                                         -8-
<PAGE>

               5.2   MSDW TRUST shall indemnify and hold the Fund harmless from
or against any and all losses, damages, costs, charges, counsel fees, payments,
expenses and liability arising out of or attributable to any action or failure
or omission to act by MSDW TRUST as a result of the lack of good faith,
negligence or willful misconduct of MSDW TRUST, its officers, employees or
agents.

               5.3   At any time, MSDW TRUST may apply to any officer of the
Fund for instructions, and may consult with legal counsel to the Fund, with
respect to any matter arising in connection with the services to be performed by
MSDW TRUST under this Agreement, and MSDW TRUST and its agents or subcontractors
shall not be liable and shall be indemnified by the Fund for any action taken or
omitted by it in reliance upon such instructions or upon the opinion of such
counsel.  MSDW TRUST, its agents and subcontractors shall be protected and
indemnified in acting upon any paper or document furnished by or on behalf of
the Fund, reasonably believed to be genuine and to have been signed by the
proper person or persons, or upon any instruction, information, data, records or
documents provided to MSDW TRUST or its agents or subcontractors by machine
readable input, telex, CRT data entry or other similar means authorized by the
Fund, and shall not be held to have notice of any change of authority of any
person, until receipt of written notice thereof from the Fund.  MSDW TRUST, its
agents and subcontractors shall also be protected and indemnified in recognizing
stock certificates which are reasonably believed to bear the proper manual or
facsimile signature of the officers of the Fund, and the proper countersignature
of any former transfer agent or registrar, or of a co-transfer agent or
co-registrar.


                                         -9-
<PAGE>

               5.4   In the event either party is unable to perform its
obligations under the terms of this Agreement because of acts of God, strikes,
equipment or transmission failure or damage reasonably beyond its control, or
other causes reasonably beyond its control, such party shall not be liable for
damages to the other for any damages resulting from such failure to perform or
otherwise from such causes.

               5.5   Neither party to this Agreement shall be liable to the
other party for consequential damages under any provision of this Agreement or
for any act or failure to act hereunder.

               5.6   In order that the indemnification provisions contained in
this Article 5 shall apply, upon the assertion of a claim for which either party
may be required to indemnify the other, the party seeking indemnification shall
promptly notify the other party of such assertion, and shall keep the other
party advised with respect to all developments concerning such claim.  The party
who may be required to indemnify shall have the option to participate with the
party seeking indemnification in the defense of such claim.  The party seeking
indemnification shall in no case confess any claim or make any compromise in any
case in which the other party may be required to indemnify it except with the
other party's prior written consent.

Article 6      DOCUMENTS AND COVENANTS OF THE FUND AND MSDW TRUST

               6.1   The Fund shall promptly furnish to MSDW TRUST the
following, unless previously furnished to Dean Witter Trust Company, the prior
transfer agent of the Fund:


                                         -10-
<PAGE>

               (a)   If a corporation:

               (i)   A certified copy of the resolution of the Board of
Directors of the Fund authorizing the appointment of MSDW TRUST and the
execution and delivery of this Agreement;

               (ii)  A certified copy of the Articles of Incorporation and
By-Laws of the Fund and all amendments thereto;

               (iii) Certified copies of each vote of the Board of Directors
designating persons authorized to give instructions on behalf of the Fund and
signature cards bearing the signature of any officer of the Fund or any other
person authorized to sign written instructions on behalf of the Fund;

               (iv)  A specimen of the certificate for Shares of the Fund in
the form approved by the Board of Directors, with a certificate of the Secretary
of the Fund as to such approval;

               (b)   If a business trust:
 

               (i)   A certified copy of the resolution of the Board of
Trustees of the Fund authorizing the appointment of MSDW TRUST and the execution
and delivery of this Agreement;

               (ii)  A certified copy of the Declaration of Trust and By-Laws
of the Fund and all amendments thereto;


                                         -11-
<PAGE>

               (iii) Certified copies of each vote of the Board of Trustees
designating persons authorized to give instructions on behalf of the Fund and
signature cards bearing the signature of any officer of the Fund or any other
person authorized to sign written instructions on behalf of the Fund;

               (iv)  A specimen of the certificate for Shares of the Fund in
the form approved by the Board of Trustees, with a certificate of the Secretary
of the Fund as to such approval;

               (c)   The current registration statements and any amendments and
supplements thereto filed with the SEC pursuant to the requirements of the 1933
Act or the 1940 Act;

               (d)   All account application forms or other documents relating
to Shareholder accounts and/or relating to any plan, program or service offered
or to be offered by the Fund; and

               (e)   Such other certificates, documents or opinions as MSDW
TRUST deems to be appropriate or necessary for the proper performance of its
duties.

               6.2   MSDW TRUST hereby agrees to establish and maintain
facilities and procedures reasonably acceptable to the Fund for safekeeping of
Share certificates, check forms and facsimile signature imprinting devices, if
any; and for the preparation or use, and for keeping account of, such
certificates, forms and devices.


                                         -12-
<PAGE>

               6.3   MSDW TRUST shall prepare and keep records relating to the
services to be performed hereunder, in the form and manner as it may deem
advisable and as required by applicable laws and regulations.  To the extent
required by Section 31 of the 1940 Act, and the rules and regulations
thereunder, MSDW TRUST agrees that all such records prepared or maintained by
MSDW TRUST relating to the services performed by MSDW TRUST hereunder are the
property of the Fund and will be preserved, maintained and made available in
accordance with such Section 31 of the 1940 Act, and the rules and regulations
thereunder, and will be surrendered promptly to the Fund on and in accordance
with its request.

               6.4   MSDW TRUST and the Fund agree that all books, records,
information and data pertaining to the business of the other party which are
exchanged or received pursuant to the negotiation or the carrying out of this
Agreement shall remain confidential and shall not be voluntarily disclosed to
any other person except as may be required by law or with the prior consent of
MSDW TRUST and the Fund.

               6.5   In case of any request or demands for the inspection of
the Shareholder records of the Fund, MSDW TRUST will endeavor to notify the Fund
and to secure instructions from an authorized officer of the Fund as to such
inspection.  MSDW TRUST reserves the right, however, to exhibit the Shareholder
records to any person whenever it is advised by its counsel that it may be held
liable for the failure to exhibit the Shareholder records to such person.

Article 7      DURATION AND TERMINATION OF AGREEMENT

               7.1   This Agreement shall remain in full force and effect until
August 1,


                                         -13-
<PAGE>

2000 and from year-to-year thereafter unless terminated by either party as
provided in Section 7.2 hereof.

               7.2   This Agreement may be terminated by the Fund on 60 days
written notice, and by MSDW TRUST on 90 days written notice, to the other party
without payment of any penalty.

               7.3   Should the Fund exercise its right to terminate, all
out-of-pocket expenses associated with the movement of records and other
materials will be borne by the Fund.  Additionally, MSDW TRUST reserves the
right to charge for any other reasonable fees and expenses associated with such
termination.

Article 8      ASSIGNMENT

               8.1   Except as provided in Section 8.3 below, neither this
Agreement nor any rights or obligations hereunder may be assigned by either
party without the written consent of the other party.

               8.2   This Agreement shall inure to the benefit of and be
binding upon the parties and their respective permitted successors and assigns.

               8.3   MSDW TRUST may, in its sole discretion and without further
consent by the Fund, subcontract, in whole or in part, for the performance of
its obligations and duties hereunder with any person or entity including but not
limited to companies which are affiliated with MSDW TRUST; PROVIDED, HOWEVER,
that such person or entity has and maintains the qualifications, if any,
required to perform such obligations and duties, and that MSDW TRUST


                                         -14-
<PAGE>

shall be as fully responsible to the Fund for the acts and omissions of any
agent or subcontractor as it is for its own acts or omissions under this
Agreement.

Article 9      AFFILIATIONS

               9.1   MSDW TRUST may now or hereafter, without the consent of or
notice to the Fund, function as transfer agent and/or shareholder servicing
agent for any other investment company registered with the SEC under the 1940
Act and for any other issuer, including without limitation any investment
company whose adviser, administrator, sponsor or principal underwriter is or may
become affiliated with Morgan Stanley Dean Witter & Co. or any of its direct or
indirect subsidiaries or affiliates.

               9.2   It is understood and agreed that the Directors or Trustees
(as the case may be), officers, employees, agents and shareholders of the Fund,
and the directors, officers, employees, agents and shareholders of the Fund's
investment adviser and/or distributor, are or may be interested in MSDW TRUST as
directors, officers, employees, agents and shareholders or otherwise, and that
the directors, officers, employees, agents and shareholders of MSDW TRUST may be
interested in the Fund as Directors or Trustees (as the case may be), officers,
employees, agents and shareholders or otherwise, or in the investment adviser
and/or distributor as directors, officers, employees, agents, shareholders or
otherwise.

Article 10     AMENDMENT

               10.1  This Agreement may be amended or modified by a written
agreement executed by both parties and authorized or approved by a resolution of
the Board of Directors or the Board of Trustees (as the case may be) of the
Fund.


                                         -15-
<PAGE>

Article 11     APPLICABLE LAW

               11.1  This Agreement shall be construed and the provisions
thereof interpreted under and in accordance with the laws of the State of New
York.

Article 12     MISCELLANEOUS

               12.1  In the event that one or more additional investment
companies managed or administered by Morgan Stanley Dean Witter Advisors Inc. or
any of its affiliates ("Additional Funds") desires to retain MSDW TRUST to act
as transfer agent, dividend disbursing agent and/or shareholder servicing agent,
and MSDW TRUST desires to render such services, such services shall be provided
pursuant to a letter agreement, substantially in the form of Exhibit A hereto,
between MSDW TRUST and each Additional Fund.

               12.2  In the event of an alleged loss or destruction of any
Share certificate, no new certificate shall be issued in lieu thereof, unless
there shall first be furnished to MSDW TRUST an affidavit of loss or non-receipt
by the holder of Shares with respect to which a certificate has been lost or
destroyed, supported by an appropriate bond satisfactory to MSDW TRUST and the
Fund issued by a surety company satisfactory to MSDW TRUST, except that MSDW
TRUST may accept an affidavit of loss and indemnity agreement executed by the
registered holder (or legal representative) without surety in such form as MSDW
TRUST deems appropriate indemnifying MSDW TRUST and the Fund for the issuance of
a replacement certificate, in cases where the alleged loss is in the amount of
$1,000 or less.

               12.3  In the event that any check or other order for payment of
money on the


                                         -16-
<PAGE>

account of any Shareholder or new investor is returned unpaid for any reason,
MSDW TRUST will (a) give prompt notification to the Fund's distributor
("Distributor") (or to the Fund if the Fund acts as its own distributor) of such
non-payment; and (b) take such other action, including imposition of a
reasonable processing or handling fee, as MSDW TRUST may, in its sole
discretion, deem appropriate or as the Fund and, if applicable, the Distributor
may instruct MSDW TRUST.

          12.4   Any notice or other instrument authorized or required by this
Agreement to be given in writing to the Fund or to MSDW TRUST shall be
sufficiently given if addressed to that party and received by it at its office
set forth below or at such other place as it may from time to time designate in
writing.

To the Fund:

[Name of Fund]
Two World Trade Center
New York, New York  10048

Attention:  General Counsel

To MSDW TRUST:

Morgan Stanley Dean Witter Trust FSB
Harborside Financial Center
Plaza Two
Jersey City, New Jersey  07311

Attention:  President

Article 13     MERGER OF AGREEMENT

               13.1  This Agreement constitutes the entire agreement between
the parties hereto and supersedes any prior agreement with respect to the
subject matter hereof whether oral or written.


                                         -17-
<PAGE>

Article 14     PERSONAL LIABILITY

               14.1  In the case of a Fund organized as a Massachusetts
business trust, a copy of the Declaration of Trust of the Fund is on file with
the Secretary of The Commonwealth of Massachusetts, and notice is hereby given
that this instrument is executed on behalf of the Board of Trustees of the Fund
as Trustees and not individually and that the obligations of this instrument are
not binding upon any of the Trustees or shareholders individually but are
binding only upon the assets and property of the Fund; provided, however, that
the Declaration of Trust of the Fund provides that the assets of a particular
Series of the Fund shall under no circumstances be charged with liabilities
attributable to any other Series of the Fund and that all persons extending
credit to, or contracting with or having any claim against, a particular Series
of the Fund shall look only to the assets of that particular Series for payment
of such credit, contract or claim.

          IN WITNESS WHEREOF, the parties hereto have caused this Amended and
Restated Agreement to be executed in their names and on their behalf by and
through their duly authorized officers, as of the day and year first above
written.

     
     MORGAN STANLEY DEAN WITTER FUNDS

     MONEY MARKET FUNDS

  1. Morgan Stanley Dean Witter Liquid Asset Fund Inc.
  2. Active Assets Money Trust
  3. Morgan Stanley Dean Witter U.S. Government Money Market Trust
  4. Active Assets Government Securities Trust
  5. Morgan Stanley Dean Witter Tax-Free Daily Income Trust
  6. Active Assets Tax-Free Trust
  7. Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
  8. Morgan Stanley Dean Witter New York Municipal Money Market Trust
  9. Active Assets California Tax-Free Trust


                                         -18-
<PAGE>

     EQUITY FUNDS

 10. Morgan Stanley Dean Witter American Value Fund
 11. Morgan Stanley Dean Witter Mid-Cap Growth Fund
 12. Morgan Stanley Dean Witter Dividend Growth Securities Inc.
 13. Morgan Stanley Dean Witter Capital Growth Securities
 14. Morgan Stanley Dean Witter Global Dividend Growth Securities
 15. Morgan Stanley Dean Witter Income Builder Fund
 16. Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
 17. Morgan Stanley Dean Witter Precious Metals and Minerals Trust
 18. Morgan Stanley Dean Witter Developing Growth Securities Trust
 19. Morgan Stanley Dean Witter Health Sciences Trust
 20. Morgan Stanley Dean Witter Capital Appreciation Fund
 21. Morgan Stanley Dean Witter Information Fund
 22. Morgan Stanley Dean Witter Value-Added Market Series 
 23. Morgan Stanley Dean Witter European Growth Fund Inc.
 24. Morgan Stanley Dean Witter Pacific Growth Fund Inc.
 25. Morgan Stanley Dean Witter International SmallCap Fund 
 26. Morgan Stanley Dean Witter Japan Fund 
 27. Morgan Stanley Dean Witter Utilities Fund 
 28. Morgan Stanley Dean Witter Global Utilities Fund 
 29. Morgan Stanley Dean Witter Special Value Fund 
 30. Morgan Stanley Dean Witter Financial Services Trust
 31. Morgan Stanley Dean Witter Market Leader Trust
 32. Morgan Stanley Dean Witter Fund of Funds
 33. Morgan Stanley Dean Witter S&P 500 Index Fund
 34. Morgan Stanley Dean Witter Competitive Edge Fund
 35. Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
 36. Morgan Stanley Dean Witter Equity Fund
 37. Morgan Stanley Dean Witter Growth Fund
 38. Morgan Stanley Dean Witter S&P 500 Select Fund
     BALANCED FUNDS  

 39. Morgan Stanley Dean Witter Balanced Growth Fund 
 40. Morgan Stanley Dean Witter Balanced Income Trust 

     ASSET ALLOCATION FUNDS

 41. Morgan Stanley Dean Witter Strategist Fund 
 42. Dean Witter Global Asset Allocation Fund 


                                         -19-
<PAGE>

     FIXED INCOME FUNDS

 43. Morgan Stanley Dean Witter High Yield Securities Inc.
 44. Morgan Stanley Dean Witter High Income Securities
 45. Morgan Stanley Dean Witter Convertible Securities Trust
 46. Morgan Stanley Dean Witter Intermediate Income Securities
 47. Morgan Stanley Dean Witter Short-Term Bond Fund
 48. Morgan Stanley Dean Witter World Wide Income Trust
 49. Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
 50. Morgan Stanley Dean Witter Diversified Income Trust
 51. Morgan Stanley Dean Witter U.S. Government Securities Trust
 52. Morgan Stanley Dean Witter Federal Securities Trust
 53. Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
 54. Morgan Stanley Dean Witter Intermediate Term U.S. Treasury Trust
 55. Morgan Stanley Dean Witter Tax-Exempt Securities Trust 
 56. Morgan Stanley Dean Witter Limited Term Municipal Trust
 57. Morgan Stanley Dean Witter California Tax-Free Income Fund
 58. Morgan Stanley Dean Witter New York Tax-Free Income Fund
 59. Morgan Stanley Dean Witter Hawaii Municipal Trust
 60. Morgan Stanley Dean Witter Multi-State Municipal Series Trust
 61. Morgan Stanley Dean Witter Select Municipal Reinvestment Fund

     SPECIAL PURPOSE FUNDS

 62. Dean Witter Retirement Series
 63. Morgan Stanley Dean Witter Variable Investment Series
 64. Morgan Stanley Dean Witter Select Dimensions Investment Series

     TCW/DW FUNDS

 65. TCW/DW North American Government Income Trust
 66. TCW/DW Latin American Growth Fund
 67. TCW/DW Income and Growth Fund
 68. TCW/DW Small Cap Growth Fund
 69. TCW/DW Total Return Trust

                                         -20-
<PAGE>

 70. TCW/DW Global Telecom Trust
 71. TCW/DW Mid-Cap Equity Trust
 72. TCW/DW Emerging Markets Opportunities Trust


                          By:                                   
                             ----------------------------------
                              Barry Fink
                              Vice President and General Counsel

ATTEST:

- ------------------------
Assistant Secretary

                          MORGAN STANLEY DEAN WITTER TRUST FSB

                          By:                                                   
                             ----------------------------------
                              John Van Heuvelen
                              President

ATTEST:

- ------------------------
Executive Vice President


                                         -21-
<PAGE>

                                      EXHIBIT A


Morgan Stanley Dean Witter Trust FSB
Harborside Financial Center
Plaza Two
Jersey City, NJ 07311

Gentlemen:

          The undersigned, (INSET NAME OF INVESTMENT COMPANY) a (Massachusetts
business trust/Maryland corporation) (the "Fund"), desires to employ and appoint
Morgan Stanley Dean Witter Trust FSB ("MSDW TRUST") to act as transfer agent for
each series and class of shares of the Fund, whether now or hereafter authorized
or issued ("Shares"), dividend disbursing agent and shareholder servicing agent,
registrar and agent in connection with any accumulation, open-account or similar
plan provided to the holders of Shares, including without limitation any
periodic investment plan or periodic withdrawal plan.

          The Fund hereby agrees that, in consideration for the payment by the
Fund to MSDW TRUST of fees as set out in the fee schedule attached hereto as
Schedule A, MSDW TRUST shall provide such services to the Fund pursuant to the
terms and conditions set forth in the Transfer Agency and Service Agreement
annexed hereto, as if the Fund was a signatory thereto.


                                         -22-
<PAGE>

          Please indicate MSDW TRUST's acceptance of employment and appointment
by the Fund in the capacities set forth above by so indicating in the space
provided below.


                              Very truly yours,


                              (NAME OF FUND)



                              By:
                                 ------------------------------------
                                   Barry Fink
                                   Vice President and General Counsel


ACCEPTED AND AGREED TO:



MORGAN STANLEY DEAN WITTER TRUST FSB



By:
   -------------------------

Its:
    ------------------------

Date:
     -----------------------


                                         -23-
<PAGE>

                                     SCHEDULE A


Fund:          Morgan Stanley Dean Witter Intermediate Income Securities

Fees:          (1)  Annual maintenance fee of $13.20 per shareholder account,
               payable monthly.

               (2)  A fee equal to 1/12 of the fee set forth in (1) above, for
               providing Forms 1099 for accounts closed during the year, payable
               following the end of the calendar year.

               (3)  Out-of-pocket expenses in accordance with Section 2.2 of the
               Agreement.

               (4)  Fees for additional services not set forth in this Agreement
               shall be as negotiated between the parties.


                                         -24-

<PAGE>
                               SERVICES AGREEMENT
 
    AGREEMENT made as of the 17th day of April, 1995, and amended as of June 22,
1998, by and between Morgan Stanley Dean Witter Advisors Inc., a Delaware
corporation (herein referred to as "MSDW Advisors"), and Morgan Stanley Dean
Witter Services Company Inc., a Delaware corporation (herein referred to as
"MSDW Services").
 
    WHEREAS, MSDW Advisors has entered into separate agreements (each such
agreement being herein referred to as an "Investment Management Agreement") with
certain investment companies as set forth on Schedule A (each such investment
company being herein referred to as a "Fund" and, collectively, as the "Funds")
pursuant to which MSDW Advisors is to perform, or supervise the performance of,
among other services, administrative services for the Funds (and, in the case of
Funds with multiple portfolios, the Series or Portfolios of the Funds (such
Series and Portfolio being herein individually referred to as "a Series" and,
collectively, as "the Series"));
 
    WHEREAS, MSDW Advisors desires to retain MSDW Services to perform the
administrative services as described below; and
 
    WHEREAS, MSDW Services desires to be retained by MSDW Advisors to perform
such administrative services:
 
    Now, therefore, in consideration of the mutual covenants and agreements of
the parties hereto as herein set forth, the parties covenant and agree as
follows:
 
    1. MSDW Services agrees to provide administrative services to each Fund as
hereinafter set forth. Without limiting the generality of the foregoing, MSDW
Services shall (i) administer the Fund's business affairs and supervise the
overall day-to-day operations of the Fund (other than rendering investment
advice); (ii) provide the Fund with full administrative services, including the
maintenance of certain books and records, such as journals, ledger accounts and
other records required under the Investment Company Act of 1940, as amended (the
"Act"), the notification to the Fund and MSDW Advisors of available funds for
investment, the reconciliation of account information and balances among the
Fund's custodian, transfer agent and dividend disbursing agent and MSDW
Advisors, and the calculation of the net asset value of the Fund's shares; (iii)
provide the Fund with the services of persons competent to perform such
supervisory, administrative and clerical functions as are necessary to provide
effective operation of the Fund; (iv) oversee the performance of administrative
and professional services rendered to the Fund by others, including its
custodian, transfer agent and dividend disbursing agent, as well as accounting,
auditing and other services; (v) provide the Fund with adequate general office
space and facilities; (vi) assist in the preparation and the printing of the
periodic updating of the Fund's registration statement and prospectus (and, in
the case of an open-end Fund, the statement of additional information), tax
returns, proxy statements, and reports to its shareholders and the Securities
and Exchange Commission; and (vii) monitor the compliance of the Fund's
investment policies and restrictions.
 
    In the event that MSDW Advisors enters into an Investment Management
Agreement with another investment company, and wishes to retain MSDW Services to
perform administrative services hereunder, it shall notify MSDW Services in
writing. If MSDW Services is willing to render such services, it shall notify
MSDW Advisors in writing, whereupon such other Fund shall become a Fund as
defined herein.
 
    2. MSDW Services shall, at its own expense, maintain such staff and employ
or retain such personnel and consult with such other persons as it shall from
time to time determine to be necessary or useful to the performance of its
obligations under this Agreement. Without limiting the generality of the
foregoing, the staff and personnel of MSDW Services shall be deemed to include
officers of MSDW Services and persons employed or otherwise retained by MSDW
Services (including officers and employees of MSDW Advisors, with the consent of
MSDW Advisors) to furnish services, statistical and other factual data,
information with respect to technical and scientific developments, and such
other information, advice and assistance as MSDW Services may desire. MSDW
Services shall maintain each Fund's records and books of account
 
                                       1
 

<PAGE>
(other than those maintained by the Fund's transfer agent, registrar, custodian
and other agencies). All such books and records so maintained shall be the
property of the Fund and, upon request therefor, MSDW Services shall surrender
to MSDW Advisors or to the Fund such of the books and records so requested.
 
    3. MSDW Advisors will, from time to time, furnish or otherwise make
available to MSDW Services such financial reports, proxy statements and other
information relating to the business and affairs of the Fund as MSDW Services
may reasonably require in order to discharge its duties and obligations to the
Fund under this Agreement or to comply with any applicable law and regulation or
request of the Board of Directors/Trustees of the Fund.
 
    4. For the services to be rendered, the facilities furnished, and the
expenses assumed by MSDW Services, MSDW Advisors shall pay to MSDW Services
monthly compensation calculated daily (in the case of an open-end Fund) or
weekly (in the case of a closed-end Fund) by applying the annual rate or rates
set forth on Schedule B to the net assets of each Fund. Except as hereinafter
set forth, (i) in the case of an open-end Fund, compensation under this
Agreement shall be calculated by applying 1/365th of the annual rate or rates to
the Fund's or the Series' daily net assets determined as of the close of
business on that day or the last previous business day and (ii) in the case of a
closed-end Fund, compensation under this Agreement shall be calculated by
applying the annual rate or rates to the Fund's average weekly net assets
determined as of the close of the last business day of each week. If this
Agreement becomes effective subsequent to the first day of a month or shall
terminate before the last day of a month, compensation for that part of the
month this Agreement is in effect shall be prorated in a manner consistent with
the calculation of the fees as set forth on Schedule B. Subject to the
provisions of paragraph 5 hereof, payment of MSDW Services' compensation for the
preceding month shall be made as promptly as possible after completion of the
computations contemplated by paragraph 5 hereof.
 
    5. In the event the operating expenses of any open-end Fund and/or any
Series thereof, or of InterCapital Income Securities Inc., including amounts
payable to MSDW Advisors pursuant to the Investment Management Agreement, for
any fiscal year ending on a date on which this Agreement is in effect, exceed
the expense limitations applicable to the Fund and/or any Series thereof imposed
by state securities laws or regulations thereunder, as such limitations may be
raised or lowered from time to time, or, in the case of InterCapital Income
Securities Inc. or Morgan Stanley Dean Witter Variable Investment Series or any
Series thereof, the expense limitation specified in the Fund's Investment
Management Agreement, the fee payable hereunder shall be reduced on a pro rata
basis in the same proportion as the fee payable by the Fund under the Investment
Management Agreement is reduced.
 
    6. MSDW Services shall bear the cost of rendering the administrative
services to be performed by it under this Agreement, and shall, at its own
expense, pay the compensation of the officers and employees, if any, of the Fund
employed by MSDW Services, and such clerical help and bookkeeping services as
MSDW Services shall reasonably require in performing its duties hereunder.
 
    7. MSDW Services will use its best efforts in the performance of
administrative activitives on behalf of each Fund, but in the absence of willful
misfeasance, bad faith, gross negligence or reckless disregard of its
obligations hereunder, MSDW Services shall not be liable to the Fund or any of
its investors for any error of judgment or mistake of law or for any act or
omission by MSDW Services or for any losses sustained by the Fund or its
investors. It is understood that, subject to the terms and conditions of the
Investment Management Agreement between each Fund and MSDW Advisors, MSDW
Advisors shall retain ultimate responsibility for all services to be performed
hereunder by MSDW Services. MSDW Services shall indemnify MSDW Advisors and hold
it harmless from any liability that MSDW Advisors may incur arising out of any
act or failure to act by MSDW Services in carrying out its responsibilities
hereunder.
 
    8. It is understood that any of the shareholders, Directors/Trustees,
officers and employees of the Fund may be a shareholder, director, officer or
employee of, or be otherwise interested in, MSDW Services, and in any person
controlling, controlled by or under common control with MSDW Services, and that
MSDW Services and any person controlling, controlled by or under common control
with MSDW
 
                                       2
<PAGE>
Services may have an interest in the Fund. It is also understood that MSDW
Services and any affiliated persons thereof or any persons controlling,
controlled by or under common control with MSDW Services have and may have
advisory, management, administration service or other contracts with other
organizations and persons, and may have other interests and businesses, and
further may purchase, sell or trade any securities or commodities for their own
accounts or for the account of others for whom they may be acting.
 
    9. This Agreement shall continue until April 30, 1999, and thereafter shall
continue automatically for successive periods of one year unless terminated by
either party by written notice delivered to the other party within 30 days of
the expiration of the then-existing period. Notwithstanding the foregoing, this
Agreement may be terminated at any time, by either party on 30 days' written
notice delivered to the other party. In the event that the Investment Management
Agreement between any Fund and MSDW Advisors is terminated, this Agreement will
automatically terminate with respect to such Fund.
 
    10. This Agreement may be amended or modified by the parties in any manner
by written agreement executed by each of the parties hereto.
 
    11. This Agreement may be assigned by either party with the written consent
of the other party.
 
    12. This Agreement shall be construed and interpreted in accordance with the
laws of the State of New York.
 
    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement, as amended, on June 22, 1998 in New York, New York.
 
<TABLE>
<S>                                            <C>
                                               MORGAN STANLEY DEAN WITTER ADVISORS INC.
 
                                               By: -----------------------------------------
 
Attest:
- ---------------------------------------------
 
                                               MORGAN STANLEY DEAN WITTER SERVICES COMPANY
                                               INC.
 
                                               By: -----------------------------------------
 
Attest:
- ---------------------------------------------
</TABLE>
 
                                       3
<PAGE>
                                   SCHEDULE A
                        MORGAN STANLEY DEAN WITTER FUNDS
                         AS AMENDED AS OF JULY 22, 1998
 
                                 OPEN-END FUNDS
 
<TABLE>
<C>        <S>
       1.  Active Assets California Tax-Free Trust
       2.  Active Assets Government Securities Trust
       3.  Active Assets Money Trust
       4.  Active Assets Tax-Free Trust
       5.  Dean Witter Retirement Series
       6.  Morgan Stanley Dean Witter American Value Fund
       7.  Morgan Stanley Dean Witter Balanced Growth Fund
       8.  Morgan Stanley Dean Witter Balanced Income Fund
       9.  Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
      10.  Morgan Stanley Dean Witter California Tax-Free Income Fund
      11.  Morgan Stanley Dean Witter Capital Appreciation Fund
      12.  Morgan Stanley Dean Witter Capital Growth Securities
      13.  Morgan Stanley Dean Witter Competitive Edge Fund, "BEST IDEAS" Portfolio
      14.  Morgan Stanley Dean Witter Convertible Securities Trust
      15.  Morgan Stanley Dean Witter Developing Growth Securities Trust
      16.  Morgan Stanley Dean Witter Diversified Income Trust
      17.  Morgan Stanley Dean Witter Dividend Growth Securities Inc.
      18.  Morgan Stanley Dean Witter Equity Fund
      19.  Morgan Stanley Dean Witter European Growth Fund Inc.
      20.  Morgan Stanley Dean Witter Federal Securities Trust
      21.  Morgan Stanley Dean Witter Financial Services Trust
      22.  Morgan Stanley Dean Witter Fund of Funds
           (i)  Domestic Portfolio
           (ii) International Portfolio
      23.  Morgan Stanley Dean Witter Global Dividend Growth Securities
      24.  Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
      25.  Morgan Stanley Dean Witter Global Utilities Fund
      26.  Morgan Stanley Dean Witter Growth Fund
      27.  Morgan Stanley Dean Witter Hawaii Municipal Trust
      28.  Morgan Stanley Dean Witter Health Sciences Trust
      29.  Morgan Stanley Dean Witter High Yield Securities Inc.
      30.  Morgan Stanley Dean Witter Income Builder Fund
      31.  Morgan Stanley Dean Witter Information Fund
      32.  Morgan Stanley Dean Witter Intermediate Income Securities
      33.  Morgan Stanley Dean Witter Intermediate Term U.S. Treasury Trust
      34.  Morgan Stanley Dean Witter International SmallCap Fund
      35.  Morgan Stanley Dean Witter Japan Fund
      36.  Morgan Stanley Dean Witter Limited Term Municipal Trust
      37.  Morgan Stanley Dean Witter Liquid Asset Fund Inc.
      38.  Morgan Stanley Dean Witter Market Leader Trust
      39.  Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
      40.  Morgan Stanley Dean Witter Mid-Cap Growth Fund
      41.  Morgan Stanley Dean Witter Multi-State Municipal Series Trust
      42.  Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
      43.  Morgan Stanley Dean Witter New York Municipal Money Market Trust
</TABLE>
 
                                      A-1
<PAGE>
<TABLE>
<C>        <S>
      44.  Morgan Stanley Dean Witter New York Tax-Free Income Fund
      45.  Morgan Stanley Dean Witter Pacific Growth Fund Inc.
      46.  Morgan Stanley Dean Witter Precious Metals and Minerals Trust
      47.  Morgan Stanley Dean Witter Select Dimensions Investment Series
           (i)   American Value Portfolio
           (ii)  Balanced Growth Portfolio
           (iii) Developing Growth Portfolio
           (iv)  Diversified Income Portfolio
           (v)   Dividend Growth Portfolio
           (vi)  Emerging Markets Portfolio
           (vii) Global Equity Portfolio
           (viii) Growth Portfolio
           (ix)  Mid-Cap Growth Portfolio
           (x)   Money Market Portfolio
           (xi)  North American Government Securities Portfolio
           (xii) Utilities Portfolio
           (xiii) Value-Added Market Portfolio
      48.  Morgan Stanley Dean Witter Select Municipal Reinvestment Fund
      49.  Morgan Stanley Dean Witter U.S. Government Money Market Trust
      50.  Morgan Stanley Dean Witter Utilities Fund
      51.  Morgan Stanley Dean Witter Short-Term Bond Fund
      52.  Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
      53.  Morgan Stanley Dean Witter Special Value Fund
      54.  Morgan Stanley Dean Witter Strategist Fund
      55.  Morgan Stanley Dean Witter S&P 500 Index Fund
      56.  Morgan Stanley Dean Witter S&P 500 Select Fund
      57.  Morgan Stanley Dean Witter Tax-Exempt Securities Trust
      58.  Morgan Stanley Dean Witter Tax-Free Daily Income Trust
      59.  Morgan Stanley Dean Witter U.S. Government Securities Trust
      60.  Morgan Stanley Dean Witter Value Fund
      61.  Morgan Stanley Dean Witter Value-Added Market Series
      62.  Morgan Stanley Dean Witter Variable Investment Series
           (i)   Capital Appreciation Portfolio
           (ii)  Capital Growth Portfolio
           (iii) Competitive Edge "Best Ideas" Portfolio
           (iv)  Dividend Growth Portfolio
           (v)   Equity Portfolio
           (vi)  European Growth Portfolio
           (vii) Global Dividend Growth Portfolio
           (viii) High Yield Portfolio
           (ix)  Income Builder Portfolio
           (x)   Money Market Portfolio
           (xi)  Quality Income Plus Portfolio
           (xii) Pacific Growth Portfolio
           (xiii) S&P 500 Index Portfolio
           (xiv) Strategist Portfolio
           (xv)  Utilities Portfolio
      63.  Morgan Stanley Dean Witter World Wide Income Trust
      64.  Morgan Stanley Dean Witter Worldwide High Income Fund
      65.  Dean Witter Global Asset Allocation Fund
</TABLE>
 
                                      A-2
<PAGE>
<TABLE>
<CAPTION>
                                              CLOSED-END FUNDS
<C>        <S>
      66.  High Income Advantage Trust
      67.  High Income Advantage Trust II
      68.  High Income Advantage Trust III
      69.  InterCapital Income Securities Inc.
      70.  Dean Witter Government Income Trust
      71.  InterCapital Insured Municipal Bond Trust
      72.  InterCapital Insured Municipal Trust
      73.  InterCapital Insured Municipal Income Trust
      74.  InterCapital California Insured Municipal Income Trust
      75.  InterCapital Insured Municipal Securities
      76.  InterCapital Insured California Municipal Securities
      77.  InterCapital Quality Municipal Investment Trust
      78.  InterCapital Quality Municipal Income Trust
      79.  InterCapital Quality Municipal Securities
      80.  InterCapital California Quality Municipal Securities
      81.  InterCapital New York Quality Municipal Securities
</TABLE>
 
                                      A-3
<PAGE>
                                                                      SCHEDULE B
 
                MORGAN STANLEY DEAN WITTER SERVICES COMPANY INC.
                        SCHEDULE OF ADMINISTRATIVE FEES
                         AS AMENDED AS OF JUNE 22, 1998
 
    Monthly compensation calculated daily by applying the following annual rates
to a fund's daily net assets:
 
<TABLE>
<S>                                                                <C>
FIXED INCOME FUNDS
 
Morgan Stanley Dean Witter Balanced Income Fund                    0.060% of the daily net assets.
 
Morgan Stanley Dean Witter California Tax-Free Income Fund         0.055% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.0525% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.050% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.0475% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.25 billion; and
                                                                   0.045% of the portion of the daily net assets exceeding $1.25
                                                                   billion.
 
Morgan Stanley Dean Witter Convertible Securities Trust            0.060% of the portion of the daily net assets not exceeding $750
                                                                   million; 0.055% of the portion of the daily net assets exceeding
                                                                   $750 million but not exceeding $1 billion; 0.050% of the portion
                                                                   of the daily net assets of the exceeding $1 billion but not
                                                                   exceeding $1.5 billion; 0.0475% of the portion of the daily net
                                                                   assets exceeding $1.5 billion but not exceeding $2 billion;
                                                                   0.045% of the portion of the daily net assets exceeding $2
                                                                   billion but not exceeding $3 billion; and 0.0425% of the portion
                                                                   of the daily net assets exceeding $3 billion.
 
Morgan Stanley Dean Witter Diversified Income Trust                0.040% of the daily net assets.
 
Morgan Stanley Dean Witter Federal Securities Trust                0.055% of the portion of the daily net assets not exceeding $1
                                                                   billion; 0.0525% of the portion of the daily net assets exceeding
                                                                   $1 billion but not exceeding $1.5 billion; 0.050% of the portion
                                                                   of the daily net assets exceeding $1.5 billion but not exceeding
                                                                   $2 billion; 0.0475% of the portion of the daily net assets
                                                                   exceeding $2 billion but not exceeding $2.5 billion; 0.045% of
                                                                   the portion of the daily net assets exceeding $2.5 billion but
                                                                   not exceeding $5 billion; 0.0425% of the portion of the daily net
                                                                   assets exceeding $5 billion but not exceeding $7.5 billion;
                                                                   0.040% of the portion of the daily net assets exceeding $7.5
                                                                   billion but not exceeding $10 billion; 0.0375% of the portion of
                                                                   the daily net assets exceeding $10 billion but not exceeding
                                                                   $12.5 billion; and 0.035% of the portion of the daily net assets
                                                                   exceeding $12.5 billion.
 
Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.      0.055% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.050% of the portion of the daily net assets
                                                                   exceeding $500 million.
</TABLE>
 
                                      B-1
<PAGE>
<TABLE>
<S>                                                                <C>
Morgan Stanley Dean Witter Hawaii Municipal Trust                  0.035% of the daily net assets.
 
Morgan Stanley Dean Witter High Yield Securities Inc.              0.050% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.0425% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $2 billion; 0.0325%
                                                                   of the portion of the daily net assets exceeding $2 billion but
                                                                   not exceeding $3 billion; and 0.030% of the portion of daily net
                                                                   assets exceeding $3 billion.
 
Morgan Stanley Dean Witter Intermediate Income Securities          0.060% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.050% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.040% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; and 0.030% of the portion of the daily net
                                                                   assets exceeding $1 billion.
 
Morgan Stanley Dean Witter Intermediate Term                       0.035% of the daily net assets.
  U.S. Treasury Trust
 
Morgan Stanley Dean Witter Limited Term Municipal Trust            0.050% of the daily net assets.
 
Morgan Stanley Dean Witter Multi-State Municipal Series Trust (10  0.035% of the daily net assets.
  Series)
 
Morgan Stanley Dean Witter New York Tax-Free Income Fund           0.055% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.0525% of the portion of the daily net assets
                                                                   exceeding $500 million.
 
Morgan Stanley Dean Witter Retirement Series--Intermediate Income  0.065% of the daily net assets.
  Securities Series
  U.S. Government Securities Series                                0.065% of the daily net assets.
 
Morgan Stanley Dean Witter Select Dimensions Investment Series--   0.039% of the daily net assets.
  North American Government Securities Portfolio
 
Morgan Stanley Dean Witter Select Municipal Reinvestment Fund      0.050% of the daily net assets.
 
Morgan Stanley Dean Witter Short-Term Bond Fund                    0.070% of the daily net assets.
 
Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust          0.035% of the daily net assets.
</TABLE>
 
                                      B-2
<PAGE>
<TABLE>
<S>                                                                <C>
Morgan Stanley Dean Witter Tax-Exempt Securities Trust             0.050% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.0425% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; and 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.25 billion;
                                                                   .0325% of the portion of the daily net assets exceeding $1.25
                                                                   billion.
 
Morgan Stanley Dean Witter U.S. Government Securities Trust        0.050% of the portion of the daily net assets not exceeding $1
                                                                   billion; 0.0475% of the portion of the daily net assets exceeding
                                                                   $1 billion but not exceeding $1.5 billion; 0.045% of the portion
                                                                   of the daily net assets exceeding $1.5 billion but not exceeding
                                                                   $2 billion; 0.0425% of the portion of the daily net assets
                                                                   exceeding $2 billion but not exceeding $2.5 billion; 0.040% of
                                                                   the portion of the daily net assets exceeding $2.5 billion but
                                                                   not exceeding $5 billion; 0.0375% of the portion of the daily net
                                                                   assets exceeding $5 billion but not exceeding $7.5 billion;
                                                                   0.035% of the portion of the daily net assets exceeding $7.5
                                                                   billion but not exceeding $10 billion; 0.0325% of the portion of
                                                                   the daily net assets exceeding $10 billion but not exceeding
                                                                   $12.5 billion; and 0.030% of the portion of the daily net assets
                                                                   exceeding $12.5 billion.
 
Morgan Stanley Dean Witter Variable Investment Series--High Yield  0.050% of the portion of the daily net assets not exceeding $500
  Portfolio                                                        million; and 0.0425% of the daily net assets exceeding $500
                                                                   million.
  Quality Income Plus Portfolio                                    0.050% of the portion of the daily the net assets up to $500
                                                                   million; and 0.045% of the portion of the daily net assets
                                                                   exceeds $500 million.
 
Morgan Stanley Dean Witter World Wide Income Trust                 0.075% of the portion of the daily net assets up to $250 million;
                                                                   0.060% of the portion of the daily net assets exceeding $250
                                                                   million but not exceeding $500 million; 0.050% of the portion of
                                                                   the daily net assets of the exceeding $500 million but not
                                                                   exceeding $750 million; 0.040% of the portion of the daily net
                                                                   assets exceeding $750 million but not exceeding $1 billion; and
                                                                   0.030% of the portion of the daily net assets exceeding $1
                                                                   billion.
 
Morgan Stanley Dean Witter Worldwide High Income Fund              0.060% of the daily net assets.
 
EQUITY FUNDS
 
Morgan Stanley Dean Witter American Value Fund                     0.0625% of the portion of the daily net assets not exceeding $250
                                                                   million; 0.050% of the portion of the daily net assets exceeding
                                                                   $250 million but not exceeding $2.25 billion; 0.0475% of the
                                                                   portion of the daily net assets exceeding $2.25 billion but not
                                                                   exceeding $3.5 billion; 0.0450% of the portion of the daily net
                                                                   assets exceeding $3.5 billion but not exceeding $4.5 billion; and
                                                                   0.0425% of the portion of the daily net assets exceeding $4.5
                                                                   billion.
</TABLE>
 
                                      B-3
<PAGE>
<TABLE>
<S>                                                                <C>
Morgan Stanley Dean Witter Balanced Growth Fund                    0.060% of the daily net assets.
 
Morgan Stanley Dean Witter Capital Appreciation Fund               0.075% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.0725% of the portion of the daily net assets
                                                                   exceeding $500 million.
 
Morgan Stanley Dean Witter Capital Growth Securities               0.065% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.055% of the portion exceeding $500 million but not
                                                                   exceeding $1 billion; 0.050% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.5 billion; and
                                                                   0.0475% of the portion of the daily net assets exceeding $1.5
                                                                   billion.
 
Morgan Stanley Dean Witter Competitive Edge Fund, "BEST IDEAS"     0.065% of the portion of the daily net assets not exceeding $1.5
  Portfolio                                                        billion; and 0.0625% of the portion of the daily net assets
                                                                   exceeding $1.5 billion.
 
Morgan Stanley Dean Witter Developing Growth Securities Trust      0.050% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.0475% of the portion of the daily net assets
                                                                   exceeding $500 million.
 
Morgan Stanley Dean Witter Dividend Growth Securities Inc.         0.0625% of the portion of the daily net assets not exceeding $250
                                                                   million; 0.050% of the portion of the daily net assets exceeding
                                                                   $250 million but not exceeding $1 billion; 0.0475% of the portion
                                                                   of the daily net assets exceeding $1 billion but not exceeding $2
                                                                   billion; 0.045% of the portion of the daily net assets exceeding
                                                                   $2 billion but not exceeding $3 billion; 0.0425% of the portion
                                                                   of the daily net assets exceeding $3 billion but not exceeding $4
                                                                   billion; 0.040% of the portion of the daily net assets exceeding
                                                                   $4 billion but not exceeding $5 billion; 0.0375% of the portion
                                                                   of the daily net assets exceeding $5 billion but not exceeding $6
                                                                   billion; 0.035% of the portion of the daily net assets exceeding
                                                                   $6 billion but not exceeding $8 billion; 0.0325% of the portion
                                                                   of the daily net assets exceeding $8 billion but not exceeding
                                                                   $10 billion; 0.030% of the portion of the daily net assets
                                                                   exceeding $10 billion but not exceeding $15 billion; and 0.0275%
                                                                   of the portion of the daily net assets exceeding $15 billion.
 
Morgan Stanley Dean Witter                                         0.051% of the daily net assets.
  Equity Fund
 
Morgan Stanley Dean Witter European Growth Fund Inc.               0.060% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.057% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $2 billion; and 0.054% of the
                                                                   portion of the daily net assets exceeding $2 billion.
 
Morgan Stanley Dean Witter Financial Services Trust                0.075% of the daily net assets.
 
Morgan Stanley Dean Witter Fund of Funds-
  Domestic Portfolio                                               None
  International Portfolio                                          None
</TABLE>
 
                                      B-4
<PAGE>
<TABLE>
<S>                                                                <C>
Dean Witter Global Asset Allocation Fund                           0.070% of the daily net assets.
 
Morgan Stanley Dean Witter Global Dividend Growth Securities       0.075% of the portion of the daily net assets not exceeding $1
                                                                   billion; 0.0725% of the portion of the daily net assets exceeding
                                                                   $1 billion but not exceeding $1.5 billion; 0.070% of the portion
                                                                   of the daily net assets exceeding $1.5 billion but not exceeding
                                                                   $2.5 billion; 0.0675% of the portion of the daily net assets
                                                                   exceeding $2.5 billion but not exceeding $3.5 billion; 0.0650% of
                                                                   the portion of the daily net assets exceeding $3.5 billion but
                                                                   not exceeding $4.5 billion; and 0.0625% of the portion of the
                                                                   daily net assets exceeding $4.5 billion.
 
Morgan Stanley Dean Witter Global Utilities Fund                   0.065% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.0625% of the portion of the daily net assets
                                                                   exceeding $500 million.
 
Morgan Stanley Dean Witter Growth Fund                             0.048% of the portion of daily net assets not exceeding $750
                                                                   million; 0.045% of the portion of daily net assets exceeding $750
                                                                   million but not exceeding $1.5 billion; and 0.042% of the portion
                                                                   of daily net assets exceeding $1.5 billion.
 
Morgan Stanley Dean Witter Health Sciences Trust                   0.10% of the portion of daily net assets not exceeding $500
                                                                   million; and 0.095% of the portion of daily net assets exceeding
                                                                   $500 million.
 
Morgan Stanley Dean Witter Income Builder Fund                     0.075% of the portion of the net assets not exceeding $500
                                                                   million; and 0.0725% of the portion of daily net assets exceeding
                                                                   $500 million.
 
Morgan Stanley Dean Witter Information Fund                        0.075% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.0725% of the portion of the daily net assets
                                                                   exceeding $500 million.
 
Morgan Stanley Dean Witter International SmallCap Fund             0.075% of the daily net assets.
 
Morgan Stanley Dean Witter                                         0.060% of the daily net assets.
  Japan Fund
 
Morgan Stanley Dean Witter Market Leader Trust                     0.075% of the daily net assets.
 
Morgan Stanley Dean Witter                                         0.075 of the daily net assets.
  Mid-Cap Dividend Growth Securities
 
Morgan Stanley Dean Witter                                         0.075% of the portion of the daily net assets not exceeding $500
  Mid-Cap Growth Fund                                              million; and 0.0725% of the portion of the daily net assets
                                                                   exceeding $500 million.
 
Morgan Stanley Dean Witter Natural Resource Development            0.0625% of the portion of the daily net assets not exceeding $250
  Securities Inc.                                                  million and 0.050% of the portion of the daily net assets
                                                                   exceeding $250 million.
</TABLE>
 
                                      B-5
<PAGE>
<TABLE>
<S>                                                                <C>
Morgan Stanley Dean Witter Pacific Growth Fund Inc.                0.060% of the portion of the daily net assets not exceeding $1
                                                                   billion; 0.057% of the portion of the daily net assets exceeding
                                                                   $1 billion but not exceeding $2 billion; and 0.054% of the
                                                                   portion of the daily net assets exceeding $2 billion.
 
Morgan Stanley Dean Witter Precious Metals and                     0.080% of the daily net assets.
  Minerals Trust
 
Dean Witter Retirement Series--
  American Value Series                                            0.085% of the daily net assets.
  Capital Growth Series                                            0.085% of the daily net assets.
  Dividend Growth Series                                           0.075% of the daily net assets.
  Global Equity Series                                             0.10% of the daily net assets.
  Strategist Series                                                0.085% of the daily net assets.
  Utilities Series                                                 0.075% of the daily net assets.
  Value Added Market Series                                        0.050% of the daily net assets.
 
Morgan Stanley Dean Witter Select Dimensions Investment Series--
  American Value Portfolio                                         0.0625% of the daily net assets.
  Balanced Growth Portfolio                                        0.065% of the daily net assets.
  Developing Growth Portfolio                                      0.050% of the daily net assets.
  Diversified Income Portfolio                                     0.040% of the daily net assets.
  Dividend Growth Portfolio                                        0.0625% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.050% of the portion of the daily net assets
                                                                   exceeding $500 million.
  Emerging Markets Portfolio                                       0.075% of the daily net assets.
  Global Equity Portfolio                                          0.10% of the daily net assets.
  Growth Portfolio                                                 0.048% of the daily net assets.
  Mid-Cap Growth Portfolio                                         0.075% of the daily net assets
  Utilities Portfolio                                              0.065% of the daily net assets.
  Value-Added Market Portfolio                                     0.050% of the daily net assets.
 
Morgan Stanley Dean Witter Special Value Fund                      0.075% of the daily net assets.
 
Morgan Stanley Dean Witter Strategist Fund                         0.060% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.055% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $1 billion; 0.050% of the portion
                                                                   of the daily net assets exceeding $1 billion but not exceeding
                                                                   $1.5 billion; 0.0475% of the portion of the daily net assets
                                                                   exceeding $1.5 billion but not exceeding $2.0 billion; and 0.045%
                                                                   of the portion of the daily net assets exceeding $2.0 billion.
 
Morgan Stanley Dean Witter                                         0.040% of the daily net assets.
  S&P 500 Index Fund
 
Morgan Stanley Dean Witter                                         0.060% of the daily net assets.
  S&P 500 Select Fund
</TABLE>
 
                                      B-6
<PAGE>
<TABLE>
<S>                                                                <C>
Morgan Stanley Dean Witter Utilities Fund                          0.065% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.055% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $1 billion; 0.0525% of the portion
                                                                   of the daily net assets exceeding $1 billion but not exceeding
                                                                   $1.5 billion; 0.050% of the portion of the daily net assets
                                                                   exceeding $1.5 billion but not exceeding $2.5 billion; 0.0475% of
                                                                   the portion of the daily net assets exceeding $2.5 billion but
                                                                   not exceeding $3.5 billion; 0.045% of the portion of the daily
                                                                   net assets exceeding $3.5 but not exceeding $5 billion; and
                                                                   0.0425% of the daily net assets exceeding $5 billion.
 
Morgan Stanley Dean Witter Value Fund                              0.10% of the daily net assets.
 
Morgan Stanley Dean Witter Value-Added Market Series               0.050% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.45% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $1 billion; 0.0425% of the portion
                                                                   of the daily net assets exceeding $1.0 billion but not exceeding
                                                                   $2.0 billion; and 0.040% of the portion of the daily net assets
                                                                   exceeding $2 billion.
 
Morgan Stanley Dean Witter Variable Investment Series--
  Capital Appreciation Portfolio                                   0.075% of the daily net assets.
  Capital Growth Portfolio                                         0.065% of the daily net assets.
  Competitive Edge "Best Ideas" Portfolio                          0.065% of the daily net assets.
  Dividend Growth Portfolio                                        0.0625% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.050% of the portion of the daily net assets
                                                                   exceeding $500 million but not exceeding $1 billion; 0.0475% of
                                                                   the portion of the daily net assets exceeding $1.0 billion but
                                                                   not exceeding $2.0 billion; and 0.045% of the portion of the
                                                                   daily net assets exceeding $2 billion.
  Equity Portfolio                                                 0.050% of the portion of the daily net assets not exceeding $1
                                                                   billion; and 0.0475% of the portion of the daily net assets
                                                                   exceeding $1 billion.
  European Growth Portfolio                                        0.060% of the portion of the daily net assets not exceeding $500
                                                                   million; and 0.057% of the portion of the daily net assets
                                                                   exceeding $500 million.
  Income Builder Portfolio                                         0.075% of the daily net assets.
  S&P 500 Index Portfolio                                          0.040% of the daily net assets.
  Strategist Portfolio                                             0.050% of the daily net assets.
  Utilities Portfolio                                              0.065% of the portion of the daily net assets not exceeding $500
                                                                   million and 0.055% of the portion of the daily net assets
                                                                   exceeding $500 million.
</TABLE>
 
                                      B-7
<PAGE>
<TABLE>
<S>                                                                <C>
MONEY MARKET FUNDS
 
Active Assets Trusts:                                              0.050% of the portion of the daily net assets not exceeding $500
  (1) Active Assets Money Trust                                    million; 0.0425% of the portion of the daily net assets exceeding
  (2) Active Assets Tax-Free Trust                                 $500 million but not exceeding $750 million; 0.0375% of the
  (3) Active Assets California Tax-Free Trust                      portion of the daily net assets exceeding $750 million but not
  (4) Active Assets Government Securities Trust                    exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.5 billion;
                                                                   0.0325% of the portion of the daily net assets exceeding $1.5
                                                                   billion but not exceeding $2 billion; 0.030% of the portion of
                                                                   the daily net assets exceeding $2 billion but not exceeding $2.5
                                                                   billion; 0.0275% of the portion of the daily net assets exceeding
                                                                   $2.5 billion but not exceeding $3 billion; and 0.025% of the
                                                                   portion of the daily net assets exceeding $3 billion.
 
Morgan Stanley Dean Witter California Tax-Free Daily               0.050% of the portion of the daily net assets not exceeding $500
  Income Trust                                                     million; 0.0425% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.5 billion;
                                                                   0.0325% of the portion of the daily net assets exceeding $1.5
                                                                   billion but not exceeding $2 billion; 0.030% of the portion of
                                                                   the daily net assets exceeding $2 billion but not exceeding $2.5
                                                                   billion; 0.0275% of the portion of the daily net assets exceeding
                                                                   $2.5 billion but not exceeding $3 billion; and 0.025% of the
                                                                   portion of the daily net assets exceeding $3 billion.
 
Morgan Stanley Dean Witter Liquid Asset Fund Inc.                  0.050% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.0425% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.35 billion;
                                                                   0.0325% of the portion of the daily net assets exceeding $1.35
                                                                   billion but not exceeding $1.75 billion; 0.030% of the portion of
                                                                   the daily net assets exceeding $1.75 billion but not exceeding
                                                                   $2.15 billion; 0.0275% of the portion of the daily net assets
                                                                   exceeding $2.15 billion but not exceeding $2.5 billion; 0.025% of
                                                                   the portion of the daily net assets exceeding $2.5 billion but
                                                                   not exceeding $15 billion; 0.0249% of the portion of the daily
                                                                   net assets exceeding $15 billion but not exceeding $17.5 billion;
                                                                   and 0.0248% of the portion of the daily net assets exceeding
                                                                   $17.5 billion.
</TABLE>
 
                                      B-8
<PAGE>
<TABLE>
<S>                                                                <C>
Morgan Stanley Dean Witter                                         0.050% of the portion of the daily net assets not exceeding $500
  New York Municipal Money                                         million; 0.0425% of the portion of the daily net assets exceeding
  Market Trust                                                     $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.5 billion;
                                                                   0.0325% of the portion of the daily net assets exceeding $1.5
                                                                   billion but not exceeding $2 billion; 0.030% of the portion of
                                                                   the daily net assets exceeding $2 billion but not exceeding $2.5
                                                                   billion; 0.0275% of the portion of the daily net assets exceeding
                                                                   $2.5 billion but not exceeding $3 billion; and 0.025% of the
                                                                   portion of the daily net assets exceeding $3 billion.
 
Dean Witter Retirement Series--
  Liquid Asset Series                                              0.050% of the daily net assets.
  U.S. Government Money                                            0.050% of the daily net assets.
    Market Series
 
Morgan Stanley Dean Witter Select Dimensions Investment Series--
  Money Market Portfolio                                           0.050% of the daily net assets.
 
Morgan Stanley Dean Witter                                         0.050% of the portion of the daily net assets not exceeding $500
  Tax-Free Daily Income Trust                                      million; 0.0425% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.5 billion;
                                                                   0.0325% of the portion of the daily net assets exceeding $1.5
                                                                   billion but not exceeding $2 billion; 0.030% of the portion of
                                                                   the daily net assets exceeding $2 billion but not exceeding $2.5
                                                                   billion; 0.0275% of the portion of the daily net assets exceeding
                                                                   $2.5 billion but not exceeding $3 billion; and 0.025% of the
                                                                   portion of the daily net assets exceeding $3 billion.
 
Morgan Stanley Dean Witter U.S. Government Money Market Trust      0.050% of the portion of the daily net assets not exceeding $500
                                                                   million; 0.0425% of the portion of the daily net assets exceeding
                                                                   $500 million but not exceeding $750 million; 0.0375% of the
                                                                   portion of the daily net assets exceeding $750 million but not
                                                                   exceeding $1 billion; 0.035% of the portion of the daily net
                                                                   assets exceeding $1 billion but not exceeding $1.5 billion;
                                                                   0.0325% of the portion of the daily net assets exceeding $1.5
                                                                   billion but not exceeding $2 billion; 0.030% of the portion of
                                                                   the daily net assets exceeding $2 billion but not exceeding $2.5
                                                                   billion; 0.0275% of the portion of the daily net assets exceeding
                                                                   $2.5 billion but not exceeding $3 billion; and 0.025% of the
                                                                   portion of the daily net assets exceeding $3 billion.
 
Morgan Stanley Dean Witter Variable Investment Series-- Money      0.050% of the daily net assets.
  Market Portfolio
</TABLE>
 
                                      B-9
<PAGE>
    Monthly compensation calculated weekly by applying the following annual
rates to a fund's weekly net assets:
 
<TABLE>
<S>                                            <C>
CLOSED-END FUNDS
 
Dean Witter Government                         0.060% of the average weekly net assets.
  Income Trust
 
High Income Advantage Trust                    0.075% of the portion of the average weekly net assets not
                                               exceeding $250 million; 0.060% of the portion of average
                                               weekly net assets exceeding $250 million and not exceeding
                                               $500 million; 0.050% of the portion of average weekly net
                                               assets exceeding $500 million and not exceeding $750
                                               million; 0.040% of the portion of average weekly net assets
                                               exceeding $750 million and not exceeding $1 billion; and
                                               0.030% of the portion of average weekly net assets exceeding
                                               $1 billion.
 
High Income Advantage Trust II                 0.075% of the portion of the average weekly net assets not
                                               exceeding $250 million; 0.060% of the portion of average
                                               weekly net assets exceeding $250 million and not exceeding
                                               $500 million; 0.050% of the portion of average weekly net
                                               assets exceeding $500 million and not exceeding $750
                                               million; 0.040% of the portion of average weekly net assets
                                               exceeding $750 million and not exceeding $1 billion; and
                                               0.030% of the portion of average weekly net assets exceeding
                                               $1 billion.
 
High Income Advantage Trust III                0.075% of the portion of the average weekly net assets not
                                               exceeding $250 million; 0.060% of the portion of average
                                               weekly net assets exceeding $250 million and not exceeding
                                               $500 million; 0.050% of the portion of average weekly net
                                               assets exceeding $500 million and not exceeding $750
                                               million; 0.040% of the portion of the average weekly net
                                               assets exceeding $750 million and not exceeding $1 billion;
                                               and 0.030% of the portion of average weekly net assets
                                               exceeding $1 billion.
 
InterCapital Income Securities Inc.            0.050% of the average weekly net assets.
 
InterCapital Insured Municipal Bond Trust      0.035% of the average weekly net assets.
 
InterCapital Insured Municipal Trust           0.035% of the average weekly net assets.
 
InterCapital Insured Municipal Income Trust    0.035% of the average weekly net assets.
 
InterCapital California Insured Municipal      0.035% of the average weekly net assets.
  Income Trust
 
InterCapital Quality Municipal Investment      0.035% of the average weekly net assets.
  Trust
 
InterCapital New York Quality Municipal        0.035% of the average weekly net assets.
  Securities
 
InterCapital Quality Municipal Income Trust    0.035% of the average weekly net assets.
</TABLE>
 
                                      B-10
<PAGE>
<TABLE>
<S>                                            <C>
InterCapital Quality Municipal Securities      0.035% of the average weekly net assets.
 
InterCapital California Quality Municipal      0.035% of the average weekly net assets.
  Securities
 
InterCapital Insured Municipal Securities      0.035% of the average weekly net assets.
 
InterCapital Insured California Municipal      0.035% of the average weekly net assets.
  Securities
</TABLE>
 
                                      B-11

<PAGE>

CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the use in the Statement of Additional Information 
constituting part of this Post-Effective Amendment No. 12 to the registration 
statement on Form N-1A (the "Registration Statement") of our report dated 
October 9, 1998, relating to the financial statements and financial 
highlights of Morgan Stanley Dean Witter Intermediate Income Securities, 
formerly Dean Witter Intermediate Income Securities, which appears in such 
Statement of Additional Information, and to the incorporation by reference of 
our report into the Prospectus which constitutes part of this Registration 
Statement.  We also consent to the references to us under the headings 
"Independent Accountants" and "Experts" in such Statement of Additional 
Information and to the reference to us under the heading "Financial 
Highlights" in such Prospectus.


PricewaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York 10036
October 27, 1998

<PAGE>

                     DEAN WITTER INTERMEDIATE INCOME SECURITIES
                                          
                     SCHEDULE OF COMPUTATION OF YIELD QUOTATION
                                          
                                 WITHOUT FEE WAIVER
                                          
                                  AUGUST 31, 1998
                                          

CLASS A

                              6
YIELD = 2{[((a-b) /cd) +1] -1}



WHERE:    a = Dividends and interest earned during the period
          b = Expenses accrued for the period
          c = The average daily number of shares outstanding
              during the period that were entitled to receive
              dividends
          d = The maximum offering price per share on the last
              day of the period




                                                             6
YIELD = 2 {[((20839.66-3740.46) / 412033.235 x 10.14) +1] -1}

                                        =    4.96%

















                               17,099.20   0.004093
                               ---------
                            4,178,017.00


                          0.024808578738
                         0.0496171574761
                                   4.96%



<PAGE>

                                          
                     DEAN WITTER INTERMEDIATE INCOME SECURITIES
                                          
                     SCHEDULE OF COMPUTATION OF YIELD QUOTATION
                                          
                                 WITHOUT FEE WAIVER
                                          
                                  AUGUST 31, 1998


CLASS B

                               6 
YIELD = 2 {[((a-b) /cd) +1] -1}



WHERE:    a = Dividends and interest earned during the period
          b = Expenses accrued for the period
          c = The average daily number of shares outstanding
              during the period that were entitled to receive
              dividends
          d = The maximum offering price per share on the last
              day of the period




                                                             6
YIELD = 2{[((763351.46-209064.43)/15102688.716 x 9.70)+1] -1}

                                   =    4.58%

















                              554,287.03   0.003784
                              ----------
                          146,496,080.55


                            0.0229176069
                            0.0458352139
                                   4.58%


<PAGE>
                                          
                                          
                     DEAN WITTER INTERMEDIATE INCOME SECURITIES
                                          
                     SCHEDULE OF COMPUTATION OF YIELD QUOTATION
                                          
                                 WITHOUT FEE WAIVER
                                          
                                  AUGUST 31, 1998


CLASS C

                                6 
YIELD = 2 {[((a-b) /cd)  +1] -1}



WHERE:    a = Dividends and interest earned during the period
          b = Expenses accrued for the period
          c = The average daily number of shares outstanding
              during the period that were entitled to receive
              dividends
          d = The maximum offering price per share on the last
              day of the period




                                                       6
YIELD = 2 {[((2044.1-562.10) /40431.199 x 9.71) +1] -1}

                                        =    4.57%
















                                1,482.00   0.003775
                                --------
                              392,586.94


                                0.022865
                                0.045729
                                   4.57%

<PAGE>
                                          
                                          
                     DEAN WITTER INTERMEDIATE INCOME SECURITIES
                                          
                     SCHEDULE OF COMPUTATION OF YIELD QUOTATION
                                          
                                 WITHOUT FEE WAIVER
                                          
                                  AUGUST 31, 1998


CLASS D

                               6 
YIELD = 2 {[((a-b) /cd) +1] -1}



WHERE:    a = Dividends and interest earned during the period
          b = Expenses accrued for the period
          c = The average daily number of shares outstanding
              during the period that were entitled to receive
              dividends
          d = The maximum offering price per share on the last
              day of the period




                                                            6
YIELD = 2 {[((29478.63-4114.70) / 583316.104 x 9.70) +1] -1}

                                    =    5.44%

















                               25,363.93   0.004483
                               ---------
                            5,658,166.21


                               0.0271995
                                0.054399
                                   5.44%

<PAGE>

                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                          INTERMEDIATE INCOME SECURITIES (A)




(A) AVERAGE ANNUAL TOTAL RETURNS (I.E. STANDARDIZED COMPUTATIONS)

                               _                              _
                              |        ______________________  |
FORMULA:                      |       |                        |
                              |  /\ n |          ERV           |
                     T  =     |    \  |     -------------      |  - 1
                              |     \ |           P            |
                              |      \|                        |
                              |_                              _|

                    T = AVERAGE ANNUAL TOTAL RETURN
                    n = NUMBER OF YEARS
                  ERV = ENDING REDEEMABLE VALUE
                    P = INITIAL INVESTMENT
 
<TABLE>
<CAPTION>

                                                              (A)
  $1,000       ERV AS OF       AGGREGATE       NUMBER OF     AVERAGE ANNUAL
INVESTED - P     31-Aug-98    TOTAL RETURN     YEARS - n     TOTAL RETURN - T
- ------------   -----------    ------------     ---------     ----------------
<S>            <C>            <C>              <C>           <C>
  31-Aug-97      $1,027.40        2.74%             1.00          2.74%

  28-Jul-97      $1,022.60        2.26%             1.09          2.07%
</TABLE>


(B) AVERAGE ANNUAL TOTAL RETURNS WITHOUT DEDUCTION FOR APPLICABLE
    SALES CHARGE  (NON STANDARD COMPUTATIONS)

(C) TOTAL RETURN WITHOUT DEDUCTION FOR APPLICABLE SALES CHARGE
    (NON STANDARD COMPUTATIONS)


                               _                              _
                              |        ______________________  |
FORMULA:                      |       |                        |
                              |  /\ n |          EV            |
                     t  =     |    \  |     -------------      |  - 1
                              |     \ |           P            |
                              |      \|                        |
                              |_                              _|

                                  EV
                    TR  =     ----------   - 1
                                   P


              t = AVERAGE ANNUAL TOTAL RETURN
                  (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
              n = NUMBER OF YEARS
             EV = ENDING VALUE (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
              P = INITIAL INVESTMENT
             TR = TOTAL RETURN (NO DEDUCTION FOR APPLICABLE SALES CHARGE)

<TABLE>
<CAPTION>

                              (C)                              (B)
  $1,000        EV AS OF      TOTAL         NUMBER OF          AVERAGE ANNUAL
INVESTED - P      31-Aug-98   RETURN - TR   YEARS - n          TOTAL RETURN - t
- ------------   ------------   -----------   ----------------   ----------------
<S>            <C>            <C>           <C>                <C>
  31-Aug-97         $1,073.00       7.30%               1.00             7.30%

  28-Jul-97         $1,068.00       6.80%               1.09             6.21%
</TABLE>



(D)         GROWTH OF $10,000*
(E)         GROWTH OF $50,000*
(F)         GROWTH OF $100,000*

FORMULA:    G= (TR+1)*P
            G= GROWTH OF INITIAL INVESTMENT
            P= INITIAL INVESTMENT
            TR= TOTAL RETURN SINCE INCEPTION

<TABLE>
<CAPTION>

               TOTAL         (D)   GROWTH OF        (E)   GROWTH OF          (F)   GROWTH OF
INVESTED - P   RETURN - TR   $10,000 INVESTMENT-G   $50,000 INVESTMENT - G   $100,000 INVESTMENT - G
- ------------   -----------   --------------------   ----------------------   -----------------------
<S>            <C>           <C>                    <C>                      <C>
  28-Jul-97           6.80      $10,226                      $51,531                $103,863
</TABLE>
 

*INITIAL INVESTMENT $9,575, $48,250 & 97,250 RESPECTIVELY REFLECTS A 4.25%,
3.50% & 2.75% SALES CHARGE


<PAGE>

                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                          INTERMEDIATE INCOME SECURITIES (B)




(A) AVERAGE ANNUAL TOTAL RETURNS (I.E. STANDARDIZED COMPUTATIONS)

                                   _                              _
                                  |        ______________________  |
FORMULA:                          |       |                        |
                                  |  /\ n |          ERV           |
                        T  =      |    \  |     -------------      |  - 1
                                  |     \ |           P            |
                                  |      \|                        |
                                  |_                              _|

                       T = AVERAGE ANNUAL COMPOUND RETURN
                       n = NUMBER OF YEARS
                     ERV = ENDING REDEEMABLE VALUE
                       P = INITIAL INVESTMENT
 
<TABLE>
<CAPTION>

                                                           (A)
  $1,000         ERV AS OF        AGGREGATE    NUMBER OF   AVERAGE ANNUAL
INVESTED - P        31-Aug-98   TOTAL RETURN   YEARS - n   COMPOUND RETURN - T
- ------------     ------------   ------------   ---------   -------------------
<S>              <C>            <C>            <C>         <C>
   31-Aug-97        $1,015.30      1.53%           1.00         1.53%

   31-Aug-93        $1,242.10     24.21%           5.00         4.43%

   03-May-89        $1,805.60     80.56%           9.33         6.54%
</TABLE>



(B) AVERAGE ANNUAL TOTAL RETURNS WITHOUT DEDUCTION FOR APPLICABLE
    SALES CHARGE  (NON STANDARD COMPUTATIONS)

(C) TOTAL RETURN WITHOUT DEDUCTION FOR APPLICABLE SALES CHARGE
    (NON STANDARD COMPUTATIONS)

                                   _                              _
                                  |        ______________________  |
FORMULA:                          |       |                        |
                                  |  /\ n |          EV            |
                        t  =      |    \  |     -------------      |  - 1
                                  |     \ |           P            |
                                  |      \|                        |
                                  |_                              _|

                                      EV
                       TR  =      ----------   - 1
                                       P


                 t = AVERAGE ANNUAL TOTAL RETURN
                     (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
                 n = NUMBER OF YEARS
                EV = ENDING VALUE (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
                 P = INITIAL INVESTMENT
                TR = TOTAL RETURN (NO DEDUCTION FOR APPLICABLE SALES CHARGE)

<TABLE>
<CAPTION>

                              (C)                             (B)
  $1,000       EV AS OF       TOTAL         NUMBER OF         AVERAGE ANNUAL
INVESTED - P      31-Aug-98   RETURN - TR   YEARS - n         TOTAL RETURN - t
- ------------   ------------   -----------   ---------------   ----------------
<S>            <C>            <C>           <C>               <C>
   31-Aug-97    $1,065.30         6.53%               1.00               6.53%

   31-Aug-93    $1,261.10        26.11%               5.00               4.75%

   03-May-89    $1,805.60        80.56%               9.33               6.54%
</TABLE>



(D)            GROWTH OF $10,000
(E)            GROWTH OF $50,000
(F)            GROWTH OF $100,000


FORMULA:       G= (TR+1)*P
               G= GROWTH OF  INITIAL INVESTMENT
               P= INITIAL INVESTMENT
               TR= TOTAL RETURN

<TABLE>
<CAPTION>

                                             (D)                         (E)                         (F)
$10,000              TOTAL                   GROWTH OF                   GROWTH OF                   GROWTH OF
INVESTED - P         RETURN - TR             $10,000 INVESTMENT          $50,000 INVESTMENT          $100,000 INVESTMENT
- ------------         ---------------------   -------------------------   -------------------------   -------------------
<S>                  <C>                     <C>                         <C>                         <C>
   03-May-89                 80.56               $18,056                           $90,280                   $180,560
</TABLE>
 


<PAGE>


                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                          INTERMEDIATE INCOME SECURITIES (C)




(A) AVERAGE ANNUAL TOTAL RETURNS (I.E. STANDARDIZED COMPUTATIONS)

                                   _                              _
                                  |        ______________________  |
FORMULA:                          |       |                        |
                                  |  /\ n |          ERV           |
                        T  =      |    \  |     -------------      |  - 1
                                  |     \ |           P            |
                                  |      \|                        |
                                  |_                              _|

                       T = AVERAGE ANNUAL COMPOUND RETURN
                       n = NUMBER OF YEARS
                     ERV = ENDING REDEEMABLE VALUE
                       P = INITIAL INVESTMENT
 
<TABLE>
<CAPTION>
                                                         (A)
  $1,000       ERV AS OF      AGGREGATE      NUMBER OF   AVERAGE ANNUAL
INVESTED - P      31-Aug-98   TOTAL RETURN   YEARS - n   TOTAL RETURN - T
- ------------   ------------   ------------   ---------   ----------------
<S>            <C>            <C>            <C>         <C>
   31-Aug-97    $1,053.90         5.39%           1.00        5.39%

   28-Jul-97    $1,060.50         6.05%           1.09        5.53%
</TABLE>


(B) AVERAGE ANNUAL TOTAL RETURNS WITHOUT DEDUCTION FOR APPLICABLE
    SALES CHARGE  (NON STANDARD COMPUTATIONS)

(C) TOTAL RETURN WITHOUT DEDUCTION FOR APPLICABLE SALES CHARGE
    (NON STANDARD COMPUTATIONS)



                                     _                              _
                                    |        ______________________  |
FORMULA:                            |       |                        |
                                    |  /\ n |          EV            |
                        t  =        |    \  |     -------------      |  - 1
                                    |     \ |           P            |
                                    |      \|                        |
                                    |_                              _|

                                        EV
                       TR  =        ----------   - 1
                                         P


                 t = AVERAGE ANNUAL TOTAL RETURN
                     (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
                 n = NUMBER OF YEARS
                EV = ENDING VALUE (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
                 P = INITIAL INVESTMENT
                TR = TOTAL RETURN (NO DEDUCTION FOR APPLICABLE SALES CHARGE)

<TABLE>
<CAPTION>

                              (C)                             (B)
  $1,000       EV AS OF       TOTAL         NUMBER OF         AVERAGE ANNUAL
INVESTED - P      31-Aug-98   RETURN - TR   YEARS - n         TOTAL RETURN - t
- ------------   ------------   -----------   ---------------   ----------------
<S>            <C>            <C>           <C>               <C>
   31-Aug-97     $1,063.90        6.39%             1.00                6.39%

   28-Jul-97     $1,060.50        6.05%             1.09                5.53%
</TABLE>


(D)            GROWTH OF $10,000
(E)            GROWTH OF $50,000
(F)            GROWTH OF $100,000

FORMULA:       G= (TR+1)*P
               G= GROWTH OF INITIAL INVESTMENT
               P= INITIAL INVESTMENT
               TR= TOTAL RETURN SINCE INCEPTION

<TABLE>
<CAPTION>

               TOTAL         (D)   GROWTH OF          (E)   GROWTH OF          (F)   GROWTH OF
INVESTED - P   RETURN - TR   $10,000 INVESTMENT - G   $50,000 INVESTMENT - G   $100,000 INVESTMENT - G
- ------------   -----------   ----------------------   ----------------------   -----------------------
<S>            <C>           <C>                      <C>                      <C>
   28-Jul-97        6.05        $10,605                          $53,025            $106,050
</TABLE>
 


<PAGE>


                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                          INTERMEDIATE INCOME SECURITIES (D)




(A) AVERAGE ANNUAL TOTAL RETURNS (NO LOAD FUND)


(B) TOTAL RETURN (NO LOAD FUND)

                                     _                              _
                                    |        ______________________  |
FORMULA:                            |       |                        |
                                    |  /\ n |          EV            |
                         t  =       |    \  |     -------------      |  - 1
                                    |     \ |           P            |
                                    |      \|                        |
                                    |_                              _|

                                        EV
                        TR  =       ----------   - 1
                                         P


                  t = AVERAGE ANNUAL COMPOUND RETURN
                  n = NUMBER OF YEARS
                 EV = ENDING VALUE
                  P = INITIAL INVESTMENT
                 TR = TOTAL RETURN

 
<TABLE>
<CAPTION>

                                      (B)                                          (A)
  $1,000             EV AS OF         TOTAL                    NUMBER OF           AVERAGE ANNUAL
INVESTED - P             31-Aug-98    RETURN - TR              YEARS - n           COMPOUND RETURN - t
- ------------------   --------------   ----------------------   -----------------   -------------------
<S>                  <C>              <C>                      <C>                 <C>
      31-Aug-97          $1,074.30                     7.43%               1.00               7.43%

      28-Jul-97          $1,069.50                     6.95%               1.09               6.35%
</TABLE>

(C)             GROWTH OF $10,000
(D)             GROWTH OF $50,000
(E)             GROWTH OF $100,000


FORMULA:        G= (TR+1)*P
                G= GROWTH OF INITIAL INVESTMENT
                P= INITIAL INVESTMENT
                TR= TOTAL RETURN SINCE INCEPTION

<TABLE>
<CAPTION>

$10,000            TOTAL             (C)   GROWTH OF               (D)   GROWTH OF         (E)   GROWTH OF
INVESTED - P       RETURN - TR      $10,000 INVESTMENT - G        $50,000 INVESTMENT - G   $100,000 INVESTMENT - G
- ----------------   --------------   ---------------------------   ----------------------   -----------------------
<S>                <C>              <C>                           <C>                      <C>
      28-Jul-97             6.95                  $10,695                  $53,475               $106,950
</TABLE>

<PAGE>
                        MORGAN STANLEY DEAN WITTER FUNDS
                              MULTIPLE CLASS PLAN
                             PURSUANT TO RULE 18f-3
 
INTRODUCTION
 
    This plan (the "Plan") is adopted pursuant to Rule 18f-3(d) of the
Investment Company Act of 1940, as amended (the "1940 Act"), effective as of
July 28, 1997, and amended as of June 22, 1998. The Plan relates to shares of
the open-end investment companies to which Morgan Stanley Dean Witter Advisors
Inc. acts as investment manager, that are listed on Schedule A, as may be
amended from time to time (each, a "Fund" and collectively, the "Funds"). The
Funds are distributed pursuant to a system (the "Multiple Class System") in
which each class of shares (each, a "Class" and collectively, the "Classes") of
a Fund represents a pro rata interest in the same portfolio of investments of
the Fund and differs only to the extent outlined below.
 
I.  DISTRIBUTION ARRANGEMENTS
 
    One or more Classes of shares of the Funds are offered for purchase by
investors with the sales load structures described below. In addition, pursuant
to Rule 12b-1 under the 1940 Act, the Funds have each adopted a Plan of
Distribution (the "12b-1 Plan") under which shares of certain Classes are
subject to the service and/or distribution fees ("12b-1 fees") described below.
 
1.  CLASS A SHARES
 
    Class A shares are offered with a front-end sales load ("FESL"). The
schedule of sales charges applicable to a Fund and the circumstances under which
the sales charges are subject to reduction are set forth in each Fund's current
prospectus. As stated in each Fund's current prospectus, Class A shares may be
purchased at net asset value (without a FESL): (i) in the case of certain large
purchases of such shares; and (ii) by certain limited categories of investors,
in each case, under the circumstances and conditions set forth in each Fund's
current prospectus. Class A shares purchased at net asset value may be subject
to a contingent deferred sales charge ("CDSC") on redemptions made within one
year of purchase. Further information relating to the CDSC, including the manner
in which it is calculated, is set forth in paragraph 6 below. Class A shares are
also subject to payments under each Fund's 12b-1 Plan to reimburse Morgan
Stanley Dean Witter Distributors Inc., Dean Witter Reynolds Inc. ("DWR"), its
affiliates and other broker-dealers for distribution expenses incurred by them
specifically on behalf of the Class, assessed at an annual rate of up to 0.25%
of average daily net assets. The entire amount of the 12b-1 fee represents a
service fee within the meaning of National Association of Securities Dealers,
Inc. ("NASD") guidelines.
 
2.  CLASS B SHARES
 
    Class B shares are offered without a FESL, but will in most cases be subject
to a six-year declining CDSC which is calculated in the manner set forth in
paragraph 6 below. Class B shares purchased by certain qualified
employer-sponsored benefit plans are subject to a three-year declining CDSC
which is calculated in the manner set forth in paragraph 6 below. The schedule
of CDSC charges applicable to each Fund is set forth in each Fund's current
prospectus. With the exception of certain of the Funds which have a different
formula described below (Morgan Stanley Dean Witter American Value Fund, Morgan
Stanley Dean Witter Natural Resource Development Securities Inc., Morgan Stanley
Dean Witter Strategist Fund and Morgan
 
                                       1
<PAGE>
Stanley Dean Witter Dividend Growth Securities Inc.)(1), Class B shares are also
subject to a fee under each Fund's respective 12b-1 Plan, assessed at the annual
rate of up to 1.0% of either: (a) the lesser of (i) the average daily aggregate
gross sales of the Fund's Class B shares since the inception of the Fund (not
including reinvestment of dividends or capital gains distributions), less the
average daily aggregate net asset value of the Fund's Class B shares redeemed
since the Fund's inception upon which a CDSC has been imposed or waived, or (ii)
the average daily net assets of Class B; or (b) the average daily net assets of
Class B. A portion of the 12b-1 fee equal to up to 0.25% of the Fund's average
daily net assets is characterized as a service fee within the meaning of the
NASD guidelines and the remaining portion of the 12b-1 fee, if any, is
characterized as an asset-based sales charge. Also, Class B shares have a
conversion feature ("Conversion Feature") under which such shares convert to
Class A shares after a certain holding period. Details of the Conversion Feature
are set forth in Section IV below.
 
3.  CLASS C SHARES
 
    Class C shares are offered without imposition of a FESL, but will in most
cases be subject to a CDSC of 1.0% on redemptions made within one year after
purchase. Further information relating to the CDSC is set forth in paragraph 6
below. In addition, Class C shares, under each Fund's 12b-1 Plan, are subject to
12b-1 payments to reimburse Morgan Stanley Dean Witter Distributors Inc., DWR,
its affiliates and other broker-dealers for distribution expenses incurred by
them specifically on behalf of the Class, assessed at the annual rate of up to
1.0% of the average daily net assets of the Class. A portion of the 12b-1 fee
equal to up to 0.25% of the Fund's average daily net assets is characterized as
a service fee within the meaning of NASD guidelines. Unlike Class B shares,
Class C shares do not have the Conversion Feature.
 
4.  CLASS D SHARES
 
    Class D shares are offered without imposition of a FESL, CDSC or a 12b-1 fee
for purchases of Fund shares by (i) investors meeting an initial minimum
investment requirement and (ii) certain other limited categories of investors,
in each case, as may be approved by the Boards of Directors/Trustees of the
Funds and as disclosed in each Fund's current prospectus.
 
5.  ADDITIONAL CLASSES OF SHARES
 
    The Boards of Directors/Trustees of the Funds have the authority to create
additional Classes, or change existing Classes, from time to time, in accordance
with Rule 18f-3 under the 1940 Act.
 
- ------------
 
(1)The payments under the 12b-1 Plan for each of Morgan Stanley Dean Witter
American Value Fund, Morgan Stanley Dean Witter Natural Resource Development
Securities Inc. and Morgan Stanley Dean Witter Dividend Growth Securities Inc.
are assessed at the annual rate of 1.0% of the lesser of: (a) the average daily
aggregate gross sales of the Fund's Class B shares since the inception of the
Fund's Plan (not including reinvestment of dividends or capital gains
distributions), less the average daily aggregate net asset value of the Fund's
Class B shares redeemed since the Plan's inception upon which a contingent
deferred sales charge has been imposed or waived, or (b) the average daily net
assets of Class B attributable to shares issued, net of related shares redeemed,
since inception of the Plan. The payments under the 12b-1 Plan for the Morgan
Stanley Dean Witter Strategist Fund are assessed at the annual rate of: (i) 1%
of the lesser of (a) the average daily aggregate gross sales of the Fund's Class
B shares since the effectiveness of the first amendment of the Plan on November
8, 1989 (not including reinvestment of dividends or capital gains
distributions), less the average daily aggregate net asset value of the Fund's
Class B shares redeemed since the effectiveness of the first amended Plan, upon
which a contingent deferred sales charge has been imposed or waived, or (b) the
average daily net assets of Class B attributable to shares issued, net of
related shares redeemed, since the effectiveness of the first amended Plan; plus
(ii) 0.25% of the average daily net assets of Class B attributable to shares
issued, net of related shares redeemed, prior to effectiveness of the first
amended Plan.
 
                                       2
<PAGE>
6.  CALCULATION OF THE CDSC
 
    Any applicable CDSC is calculated based upon the lesser of net asset value
of the shares at the time of purchase or at the time of redemption. The CDSC
does not apply to amounts representing an increase in share value due to capital
appreciation and shares acquired through the reinvestment of dividends or
capital gains distributions. The CDSC schedule applicable to a Fund and the
circumstances in which the CDSC is subject to waiver are set forth in each
Fund's prospectus.
 
II.  EXPENSE ALLOCATIONS
 
    Expenses incurred by a Fund are allocated among the various Classes of
shares pro rata based on the net assets of the Fund attributable to each Class,
except that 12b-1 fees relating to a particular Class are allocated directly to
that Class. In addition, other expenses associated with a particular Class
(except advisory or custodial fees), may be allocated directly to that Class,
provided that such expenses are reasonably identified as specifically
attributable to that Class and the direct allocation to that Class is approved
by the Fund's Board of Directors/Trustees.
 
III.  CLASS DESIGNATION
 
    All shares of the Funds held prior to July 28, 1997 (other than the shares
held by certain employee benefit plans established by DWR and its affiliate, SPS
Transaction Services, Inc., shares of Funds offered with a FESL, and shares of
Morgan Stanley Dean Witter Balanced Growth Fund and Morgan Stanley Dean Witter
Balanced Income Fund) have been designated Class B shares. Shares held prior to
July 28, 1997 by such employee benefit plans have been designated Class D
shares. Shares held prior to July 28, 1997 of Funds offered with a FESL have
been designated Class D shares. In addition, shares of Morgan Stanley Dean
Witter American Value Fund purchased prior to April 30, 1984, shares of Morgan
Stanley Dean Witter Strategist Fund purchased prior to November 8, 1989 and
shares of Morgan Stanley Dean Witter Natural Resource Development Securities
Inc. and Morgan Stanley Dean Witter Dividend Growth Securities Inc. purchased
prior to July 2, 1984 (with respect to such shares of each Fund, including such
proportion of shares acquired through reinvestment of dividends and capital
gains distributions as the total number of shares acquired prior to each of the
preceding dates in this sentence bears to the total number of shares purchased
and owned by the shareholder of that Fund) have been designated Class D shares.
Shares of Morgan Stanley Dean Witter Balanced Growth Fund and Morgan Stanley
Dean Witter Balanced Income Fund held prior to July 28, 1997 have been
designated Class C shares except that shares of Morgan Stanley Dean Witter
Balanced Growth Fund and Morgan Stanley Dean Witter Balanced Income Fund held
prior to July 28, 1997 that were acquired in exchange for shares of an
investment company offered with a CDSC have been designated Class B shares and
those that were acquired in exchange for shares of an investment company offered
with a FESL have been designated Class A shares.
 
IV.  THE CONVERSION FEATURE
 
    Class B shares held before May 1, 1997 will convert to Class A shares in
May, 2007, except that Class B shares which were purchased before July 28, 1997
by trusts for which Morgan Stanley Dean Witter Trust FSB ("MSDW Trust") provides
discretionary trustee services converted to Class A shares on August 29, 1997
(the CDSC was not applicable to such shares upon the conversion). In all other
instances, Class B shares of each Fund will automatically convert to Class A
shares, based on the relative net asset values of the shares of the two Classes
on the conversion date, which will be approximately ten (10) years after the
date of the original purchase. Conversions will be effected once a month. The 10
year period will be calculated from the last day of the month in which the
shares were purchased or, in the case of Class B shares acquired through an
exchange or a series of exchanges, from the last day of the month in which the
original Class B shares were purchased, provided that shares originally
purchased before May 1, 1997 will convert to Class A shares in May, 2007. Except
as set forth below, the conversion of shares purchased on or after May 1, 1997
will take place in the month following the tenth anniversary of the purchase.
There will also be converted at that time such proportion of Class B shares
acquired through automatic reinvestment of dividends owned by the shareholder as
the total number of his or her Class B shares converting at the time bears to
the total number of outstanding Class B shares purchased and owned by the
shareholder. In the case of Class B shares held by a 401(k) plan or other plan
qualified under Section 401(a) of the Internal Revenue Code (the "Code") and
 
                                       3
<PAGE>
for which MSDW Trust serves as Trustee or DWR's Retirement Plan Services serves
as recordkeeper pursuant to a written Recordkeeping Services Agreement, all
Class B shares will convert to Class A shares on the conversion date of the
first shares of a Fund purchased by that plan. In the case of Class B shares
previously exchanged for shares of an "Exchange Fund" (as such term is defined
in the prospectus of each Fund), the period of time the shares were held in the
Exchange Fund (calculated from the last day of the month in which the Exchange
Fund shares were acquired) is excluded from the holding period for conversion.
If those shares are subsequently re-exchanged for Class B shares of a Fund, the
holding period resumes on the last day of the month in which Class B shares are
reacquired.
 
    Effectiveness of the Conversion Feature is subject to the continuing
availability of a ruling of the Internal Revenue Service or an opinion of
counsel to the effect that (i) the conversion of shares does not constitute a
taxable event under the Code; (ii) Class A shares received on conversion will
have a basis equal to the shareholder's basis in the converted Class B shares
immediately prior to the conversion; and (iii) Class A shares received on
conversion will have a holding period that includes the holding period of the
converted Class B shares. The Conversion Feature may be suspended if the Ruling
or opinion is no longer available. In such event, Class B shares would continue
to be subject to Class B fees under the applicable Fund's 12b-1 Plan.
 
V.  EXCHANGE PRIVILEGES
 
    Shares of each Class may be exchanged for shares of the same Class of the
other Funds and for shares of certain other investment companies without the
imposition of an exchange fee as described in the prospectuses and statements of
additional information of the Funds. The exchange privilege of each Fund may be
terminated or revised at any time by the Fund upon such notice as may be
required by applicable regulatory agencies as described in each Fund's
prospectus.
 
VI.  VOTING
 
    Each Class shall have exclusive voting rights on any matter that relates
solely to its 12b-1 Plan, except that Class B shareholders will have the right
to vote on any proposed material increase in Class A's expenses, including
payments under the Class A 12b-1 Plan, if such proposal is submitted separately
to Class A shareholders. If the amount of expenses, including payments under the
Class A 12b-1 Plan, is increased materially without the approval of Class B
shareholders, the Fund will establish a new Class A for Class B shareholders
whose shares automatically convert on the same terms as applied to Class A
before the increase. In addition, each Class shall have separate voting rights
on any matter submitted to shareholders in which the interests of one Class
differ from the interests of any other Class.
 
                                       4
<PAGE>
                        MORGAN STANLEY DEAN WITTER FUNDS
                   MULTIPLE CLASS PLAN PURSUANT TO RULE 18f-3
                                   SCHEDULE A
                                AT JULY 22, 1998
 
<TABLE>
<S>        <C>
1)         Morgan Stanley Dean Witter American Value Fund
2)         Morgan Stanley Dean Witter Balanced Growth Fund
3)         Morgan Stanley Dean Witter Balanced Income Fund
4)         Morgan Stanley Dean Witter California Tax-Free Income Fund
5)         Morgan Stanley Dean Witter Capital Appreciation Fund
6)         Morgan Stanley Dean Witter Capital Growth Securities
7)         Morgan Stanley Dean Witter Competitive Edge Fund
8)         Morgan Stanley Dean Witter Convertible Securities Trust
9)         Morgan Stanley Dean Witter Developing Growth Securities Trust
10)        Morgan Stanley Dean Witter Diversified Income Trust
11)        Morgan Stanley Dean Witter Dividend Growth Securities Inc.
12)        Morgan Stanley Dean Witter Equity Fund
13)        Morgan Stanley Dean Witter European Growth Fund Inc.
14)        Morgan Stanley Dean Witter Federal Securities Trust
15)        Morgan Stanley Dean Witter Financial Services Trust
16)        Morgan Stanley Dean Witter Fund of Funds
17)        Dean Witter Global Asset Allocation Fund
18)        Morgan Stanley Dean Witter Global Dividend Growth Securities
19)        Morgan Stanley Dean Witter Global Utilities Fund
20)        Morgan Stanley Dean Witter Growth Fund
21)        Morgan Stanley Dean Witter Health Sciences Trust
22)        Morgan Stanley Dean Witter High Yield Securities Inc.
23)        Morgan Stanley Dean Witter Income Builder Fund
24)        Morgan Stanley Dean Witter Information Fund
25)        Morgan Stanley Dean Witter Intermediate Income Securities
26)        Morgan Stanley Dean Witter International SmallCap Fund
27)        Morgan Stanley Dean Witter Japan Fund
28)        Morgan Stanley Dean Witter Market Leader Trust
29)        Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
30)        Morgan Stanley Dean Witter Mid-Cap Growth Fund
31)        Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
32)        Morgan Stanley Dean Witter New York Tax-Free Income Fund
33)        Morgan Stanley Dean Witter Pacific Growth Fund Inc.
34)        Morgan Stanley Dean Witter Precious Metals and Minerals Trust
35)        Morgan Stanley Dean Witter Research Fund
36)        Morgan Stanley Dean Witter Special Value Fund
37)        Morgan Stanley Dean Witter S&P 500 Index Fund
38)        Morgan Stanley Dean Witter S&P 500 Select Fund
39)        Morgan Stanley Dean Witter Strategist Fund
40)        Morgan Stanley Dean Witter Tax-Exempt Securities Trust
41)        Morgan Stanley Dean Witter U.S. Government Securities Trust
42)        Morgan Stanley Dean Witter Utilities Fund
43)        Morgan Stanley Dean Witter Value-Added Market Series
44)        Morgan Stanley Dean Witter Value Fund
45)        Morgan Stanley Dean Witter Worldwide High Income Fund
46)        Morgan Stanley Dean Witter World Wide Income Trust
</TABLE>
 
                                       5

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 01
   <NAME> MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          AUG-31-1998
<PERIOD-START>                             SEP-01-1997
<PERIOD-END>                               AUG-31-1998
<INVESTMENTS-AT-COST>                      161,944,788
<INVESTMENTS-AT-VALUE>                     162,849,865
<RECEIVABLES>                                2,824,103
<ASSETS-OTHER>                                  49,489
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             165,723,457
<PAYABLE-FOR-SECURITIES>                     3,515,090
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,053,107
<TOTAL-LIABILITIES>                          4,568,197
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   169,681,311
<SHARES-COMMON-STOCK>                          356,015
<SHARES-COMMON-PRIOR>                          193,352
<ACCUMULATED-NII-CURRENT>                       15,315
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,446,443)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       905,077
<NET-ASSETS>                                 3,456,826
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,087,299
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,684,191
<NET-INVESTMENT-INCOME>                      8,403,108
<REALIZED-GAINS-CURRENT>                     1,768,354
<APPREC-INCREASE-CURRENT>                      134,510
<NET-CHANGE-FROM-OPS>                       10,305,972
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (100,388)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        432,771
<NUMBER-OF-SHARES-REDEEMED>                  (276,388)
<SHARES-REINVESTED>                              6,280
<NET-CHANGE-IN-ASSETS>                       1,602,072
<ACCUMULATED-NII-PRIOR>                         52,362
<ACCUMULATED-GAINS-PRIOR>                 (11,214,797)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          964,411
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,684,191
<AVERAGE-NET-ASSETS>                         1,745,203
<PER-SHARE-NAV-BEGIN>                             9.59
<PER-SHARE-NII>                                   0.56
<PER-SHARE-GAIN-APPREC>                           0.13
<PER-SHARE-DIVIDEND>                            (0.57)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.71
<EXPENSE-RATIO>                                   1.10
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 02
   <NAME> MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          AUG-31-1998
<PERIOD-START>                             SEP-01-1997
<PERIOD-END>                               AUG-31-1998
<INVESTMENTS-AT-COST>                      161,944,788
<INVESTMENTS-AT-VALUE>                     162,849,865
<RECEIVABLES>                                2,824,103
<ASSETS-OTHER>                                  49,489
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             165,723,457
<PAYABLE-FOR-SECURITIES>                     3,515,090
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,053,107
<TOTAL-LIABILITIES>                          4,568,197
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   169,681,311
<SHARES-COMMON-STOCK>                       15,613,607
<SHARES-COMMON-PRIOR>                       16,985,340
<ACCUMULATED-NII-CURRENT>                       15,315
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,446,443)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       905,077
<NET-ASSETS>                               151,515,225
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,087,299
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,684,191
<NET-INVESTMENT-INCOME>                      8,403,108
<REALIZED-GAINS-CURRENT>                     1,768,354
<APPREC-INCREASE-CURRENT>                      134,510
<NET-CHANGE-FROM-OPS>                       10,305,972
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (7,980,246)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     19,728,435
<NUMBER-OF-SHARES-REDEEMED>                 21,536,089
<SHARES-REINVESTED>                            435,921
<NET-CHANGE-IN-ASSETS>                    (11,443,744)
<ACCUMULATED-NII-PRIOR>                         52,362
<ACCUMULATED-GAINS-PRIOR>                 (11,214,797)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          964,411
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,684,191
<AVERAGE-NET-ASSETS>                       153,025,174
<PER-SHARE-NAV-BEGIN>                             9.59
<PER-SHARE-NII>                                   0.51
<PER-SHARE-GAIN-APPREC>                           0.11
<PER-SHARE-DIVIDEND>                            (0.51)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.70
<EXPENSE-RATIO>                                   1.71
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 03
   <NAME> MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          AUG-31-1998
<PERIOD-START>                             SEP-01-1997
<PERIOD-END>                               AUG-31-1998
<INVESTMENTS-AT-COST>                      161,944,788
<INVESTMENTS-AT-VALUE>                     162,849,865
<RECEIVABLES>                                2,824,103
<ASSETS-OTHER>                                  49,489
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             165,723,457
<PAYABLE-FOR-SECURITIES>                     3,515,090
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,053,107
<TOTAL-LIABILITIES>                          4,568,197
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   169,681,311
<SHARES-COMMON-STOCK>                           47,087
<SHARES-COMMON-PRIOR>                            3,999
<ACCUMULATED-NII-CURRENT>                       15,315
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,446,443)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       905,077
<NET-ASSETS>                                   457,016
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,087,299
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,684,191
<NET-INVESTMENT-INCOME>                      8,403,108
<REALIZED-GAINS-CURRENT>                     1,768,354
<APPREC-INCREASE-CURRENT>                      134,510
<NET-CHANGE-FROM-OPS>                       10,305,972
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (11,414)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         57,617
<NUMBER-OF-SHARES-REDEEMED>                   (15,371)
<SHARES-REINVESTED>                                842
<NET-CHANGE-IN-ASSETS>                         418,586
<ACCUMULATED-NII-PRIOR>                         52,362
<ACCUMULATED-GAINS-PRIOR>                 (11,214,797)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          964,411
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,684,191
<AVERAGE-NET-ASSETS>                           226,480
<PER-SHARE-NAV-BEGIN>                             9.61
<PER-SHARE-NII>                                   0.49
<PER-SHARE-GAIN-APPREC>                           0.11
<PER-SHARE-DIVIDEND>                            (0.50)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.71
<EXPENSE-RATIO>                                   1.71
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 04
   <NAME> MORGAN STANLEY DEAN WITTER INTERMEDIATE INCOME SECURITIES
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          AUG-31-1998
<PERIOD-START>                             SEP-01-1997
<PERIOD-END>                               AUG-31-1998
<INVESTMENTS-AT-COST>                      161,944,788
<INVESTMENTS-AT-VALUE>                     162,849,865
<RECEIVABLES>                                2,824,103
<ASSETS-OTHER>                                  49,489
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             165,723,457
<PAYABLE-FOR-SECURITIES>                     3,515,090
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,053,107
<TOTAL-LIABILITIES>                          4,568,197
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   169,681,311
<SHARES-COMMON-STOCK>                          590,213
<SHARES-COMMON-PRIOR>                          508,841
<ACCUMULATED-NII-CURRENT>                       15,315
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,446,443)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       905,077
<NET-ASSETS>                                 5,726,193
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,087,299
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,684,191
<NET-INVESTMENT-INCOME>                      8,403,108
<REALIZED-GAINS-CURRENT>                     1,768,354
<APPREC-INCREASE-CURRENT>                      134,510
<NET-CHANGE-FROM-OPS>                       10,305,972
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (348,107)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        339,652
<NUMBER-OF-SHARES-REDEEMED>                  (292,464)
<SHARES-REINVESTED>                             34,184
<NET-CHANGE-IN-ASSETS>                         845,801
<ACCUMULATED-NII-PRIOR>                         52,362
<ACCUMULATED-GAINS-PRIOR>                 (11,214,797)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          964,411
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,684,191
<AVERAGE-NET-ASSETS>                         5,738,246
<PER-SHARE-NAV-BEGIN>                             9.59
<PER-SHARE-NII>                                   0.59
<PER-SHARE-GAIN-APPREC>                           0.11
<PER-SHARE-DIVIDEND>                            (0.59)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.70
<EXPENSE-RATIO>                                   0.86
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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