WITTER DEAN TAX EXEMPT SECURITIES TRUST
497, 1997-08-19
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<PAGE>
                                               Filed Pursuant to Rule 497(b)
                                               Registration File No.: 333-30775

                     DEAN WITTER NATIONAL MUNICIPAL TRUST
                            TWO WORLD TRADE CENTER
                           NEW YORK, NEW YORK 10048
                                (212) 392-2550

   
                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                          TO BE HELD OCTOBER 24, 1997
    

TO THE SHAREHOLDERS OF DEAN WITTER NATIONAL MUNICIPAL TRUST: 

   Notice is hereby given of a Special Meeting of the Shareholders of Dean 
Witter National Municipal Trust ("National Municipal") to be held at the 
Conference Room, 44th Floor, Two World Trade Center, New York, New York 
10048, at 9:00 A.M., New York time, on October 24, 1997, and any adjournments 
thereof (the "Meeting"), for the following purposes: 

   1.      To consider and vote upon an Agreement and Plan of Reorganization, 
           dated June 30, 1997 (the "Reorganization Agreement"), between 
           National Municipal and Dean Witter Tax-Exempt Securities Trust 
           ("Tax-Exempt"), pursuant to which substantially all of the assets 
           of National Municipal would be combined with those of Tax-Exempt 
           and shareholders of National Municipal would become shareholders of 
           Tax-Exempt receiving Class B shares of Tax-Exempt with a value 
           equal to the value of their holdings in National Municipal (the 
           "Reorganization"); and 

   2.      To act upon such other matters as may properly come before the 
           Meeting. 

   
   The Reorganization is more fully described in the accompanying Proxy 
Statement and Prospectus and a copy of the Reorganization Agreement is 
attached as Exhibit A thereto. Shareholders of record at the close of 
business on August 11, 1997 are entitled to notice of, and to vote at, the 
Meeting. Please read the Proxy Statement and Prospectus carefully before 
telling us, through your proxy or in person, how you wish your shares to be 
voted. The Board of Trustees of National Municipal recommends you vote in 
favor of the Reorganization. WE URGE YOU TO SIGN, DATE AND MAIL THE ENCLOSED 
PROXY PROMPTLY. 

                                          By Order of the Board of Trustees, 


                                          Barry Fink, 
                                          Secretary 
August 20, 1997 
    

  YOU CAN HELP AVOID THE NECESSITY AND EXPENSE OF SENDING FOLLOW-UP LETTERS 
  TO ENSURE A QUORUM BY PROMPTLY RETURNING THE ENCLOSED PROXY. IF YOU ARE 
  UNABLE TO BE PRESENT IN PERSON, PLEASE FILL IN, SIGN AND RETURN THE 
  ENCLOSED PROXY IN ORDER THAT THE NECESSARY QUORUM BE REPRESENTED AT THE 
  MEETING. THE ENCLOSED ENVELOPE REQUIRES NO POSTAGE IF MAILED IN THE UNITED 
  STATES. 

<PAGE>

                    DEAN WITTER TAX-EXEMPT SECURITIES TRUST
               TWO WORLD TRADE CENTER, NEW YORK, NEW YORK 10048
                                (212) 392-2550

                         ACQUISITION OF THE ASSETS OF
                     DEAN WITTER NATIONAL MUNICIPAL TRUST

                       BY AND IN EXCHANGE FOR SHARES OF
                    DEAN WITTER TAX-EXEMPT SECURITIES TRUST

   
   This Proxy Statement and Prospectus is being furnished to shareholders of 
Dean Witter National Municipal Trust ("National Municipal") in connection 
with an Agreement and Plan of Reorganization, dated June 30, 1997 (the 
"Reorganization Agreement"), pursuant to which substantially all the assets 
of National Municipal will be combined with those of Dean Witter Tax-Exempt 
Securities Trust ("Tax-Exempt") in exchange for shares of Tax-Exempt. As a 
result of this transaction, shareholders of National Municipal will become 
shareholders of Tax-Exempt and will receive Class B shares of Tax-Exempt with 
a value equal to the value of their holdings in National Municipal. The terms 
and conditions of this transaction are more fully described in this Proxy 
Statement and Prospectus and in the Reorganization Agreement between National 
Municipal and Tax-Exempt, attached hereto as Exhibit A. The address of 
National Municipal is that of Tax-Exempt set forth above. This Proxy 
Statement also constitutes a Prospectus of Tax-Exempt, which is dated, August 
20, 1997, filed by Tax-Exempt with the Securities and Exchange Commission 
(the "Commission") as part of its Registration Statement on Form N-14 (the 
"Registration Statement"). 
    

   Tax-Exempt is an open-end, diversified management investment company whose 
investment objective is to provide a high level of current income exempt from 
federal income tax, consistent with the preservation of capital. Tax-Exempt 
seeks to achieve its investment objective by investing principally in 
investment grade, tax-exempt fixed-income securities (see 
"Synopsis--Comparison of National Municipal and Tax-Exempt"). 

   
   This Proxy Statement and Prospectus sets forth concisely information about 
Tax-Exempt that shareholders of National Municipal should know before voting 
on the Reorganization Agreement. A copy of the Prospectus for Tax-Exempt, 
dated July 28, 1997, is attached as Exhibit B and is incorporated herein by 
reference. Also enclosed and incorporated herein by reference is Tax-Exempt's 
Annual Report for the fiscal year ended December 31, 1996 and the succeeding 
Semi-Annual Report for the six months ended June 30, 1997. A Statement of 
Additional Information relating to the Reorganization, described in this 
Proxy Statement and Prospectus (the "Additional Statement"), dated August 20, 
1997, has been filed with the Commission and is also incorporated herein by 
reference. Also incorporated herein by reference are National Municipal's 
Prospectus dated November 26, 1996, and National Municipal's Annual Report 
for its fiscal year ended September 30, 1996 and the succeeding Semi-Annual 
Report for the six months ended March 31, 1997. Such documents are available 
without charge by calling (212) 392-2550 or (800) 526-3143 (TOLL FREE). 
    

Investors are advised to read and retain this Proxy Statement and Prospectus 
for future reference. 

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 
ON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE 
CONTRARY IS A CRIMINAL OFFENSE. 

   
        This Proxy Statement and Prospectus is dated August 20, 1997. 
    

<PAGE>

                               TABLE OF CONTENTS
                        PROXY STATEMENT AND PROSPECTUS

<TABLE>
<CAPTION>
                                                                                                  PAGE 
                                                                                                  ---- 
<S>                                                                                            <C>
INTRODUCTION...................................................................................     1 
General........................................................................................     1 
Record Date; Share Information.................................................................     1 
Proxies........................................................................................     2 
Expenses of Solicitation.......................................................................     2 
Vote Required..................................................................................     3 

SYNOPSIS.......................................................................................     4 
The Reorganization.............................................................................     4 
Fee Table......................................................................................     4 
Tax Consequences of the Reorganization.........................................................     7 
Comparison of National Municipal and Tax-Exempt ...............................................     7 

PRINCIPAL RISK FACTORS.........................................................................    10 
THE REORGANIZATION.............................................................................    11 
The Proposal...................................................................................    11 
The Board's Consideration......................................................................    11 
The Reorganization Agreement...................................................................    12 
Tax Aspects of the Reorganization..............................................................    14 
Description of Shares..........................................................................    16 
Capitalization Table (unaudited)...............................................................    16 
Appraisal Rights...............................................................................    16 

COMPARISON OF INVESTMENT OBJECTIVE, POLICIES AND RESTRICTIONS..................................    16 
Investment Objectives and Policies.............................................................    16 
Investment Restrictions........................................................................    17 

ADDITIONAL INFORMATION ABOUT NATIONAL MUNICIPAL 
 AND TAX-EXEMPT................................................................................    18 
General........................................................................................    18 
Financial Information..........................................................................    18 
Management.....................................................................................    18 
Description of Securities and Shareholder Inquiries............................................    18 
Dividends, Distributions and Taxes ............................................................    18 
Purchases, Repurchases and Redemptions.........................................................    18 

MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE....................................................    19 

FINANCIAL STATEMENTS AND EXPERTS...............................................................    19 

LEGAL MATTERS..................................................................................    19 

AVAILABLE INFORMATION..........................................................................    19 

OTHER BUSINESS.................................................................................    20 

Exhibit A--Agreement and Plan of Reorganization, dated as of June 30, 1997, by and between 
  Dean Witter National Municipal Trust and Dean Witter Tax-Exempt Securities Trust ............   A-1 
</TABLE>

<PAGE>

                     DEAN WITTER NATIONAL MUNICIPAL TRUST
                            TWO WORLD TRADE CENTER
                           NEW YORK, NEW YORK 10048
                                (212) 392-2550

                        PROXY STATEMENT AND PROSPECTUS
   
                        SPECIAL MEETING OF SHAREHOLDERS
                          TO BE HELD OCTOBER 24, 1997
    

                                 INTRODUCTION

GENERAL 

   
   This Proxy Statement and Prospectus is being furnished to the shareholders 
of Dean Witter National Municipal Trust ("National Municipal"), an open-end 
diversified management investment company, in connection with the 
solicitation by the Board of Trustees of National Municipal (the "Board") of 
proxies to be used at the Special Meeting of Shareholders of National 
Municipal to be held at the Conference Room, 44th Floor, Two World Trade 
Center, New York, New York 10048 at 9:00 A.M., New York time, on October 24, 
1997, and any adjournments thereof (the "Meeting"). It is expected that the 
mailing of this Proxy Statement and Prospectus will be made on or about 
August 20, 1997. 
    

   At the Meeting, National Municipal shareholders ("Shareholders") will 
consider and vote upon an Agreement and Plan of Reorganization, dated June 
30, 1997 (the "Reorganization Agreement"), by and between National Municipal 
and Dean Witter Tax-Exempt Securities Trust ("Tax-Exempt") pursuant to which 
substantially all of the assets of National Municipal will be combined with 
those of Tax-Exempt in exchange for shares of Tax-Exempt. As a result of this 
transaction, Shareholders will become shareholders of Tax-Exempt and will 
receive Class B shares of Tax-Exempt equal to the value of their holdings in 
National Municipal on the date of such transaction (the "Reorganization"). 
The shares to be issued by Tax-Exempt pursuant to the Reorganization will be 
Class B shares of Tax-Exempt which will be issued at net asset value without 
an initial sales charge (the "Tax-Exempt Shares"). Further information 
relating to Tax-Exempt, its Class B shares as well as the other three classes 
of shares (each, a "Class" and collectively, the "Classes") offered by 
Tax-Exempt, is set forth herein and in Tax-Exempt's current Prospectus, dated 
July 28, 1997 ("Tax-Exempt's Prospectus"), attached to this Proxy Statement 
and Prospectus and incorporated herein by reference. 

   The information concerning National Municipal contained herein has been 
supplied by National Municipal and the information concerning Tax-Exempt 
contained herein has been supplied by Tax-Exempt. 

RECORD DATE; SHARE INFORMATION 

   
   The Board has fixed the close of business on August 11, 1997 as the record 
date (the "Record Date") for the determination of the Shareholders entitled 
to notice of, and to vote at, the Meeting. As of the Record Date, there were 
8,296,355 shares of National Municipal issued and outstanding. Shareholders 
on 
    
                                       1
<PAGE>

the Record Date are entitled to one vote per share on each matter submitted 
to a vote at the Meeting. A majority of the outstanding shares entitled to 
vote, represented in person or by proxy, will constitute a quorum at the 
Meeting. 

   
   To the knowledge of the Board, as of the Record Date, no person owned of 
record or beneficially 5% or more of the outstanding shares of National 
Municipal. As of the Record Date, the trustees and officers of National 
Municipal, as a group, owned less than 1% of the outstanding shares of 
National Municipal. 

   To the knowledge of Tax-Exempt's Board of Trustees, as of the Record Date, 
no person owned of record or beneficially 5% or more of the outstanding 
shares of Tax-Exempt. As of the Record Date, the trustees and officers of 
Tax-Exempt, as a group, owned less than 1% of the outstanding shares of 
Tax-Exempt. 
    

PROXIES 

   The enclosed form of proxy, if properly executed and returned, will be 
voted in accordance with the choice specified thereon. The proxy will be 
voted in favor of the Reorganization Agreement unless a choice is indicated 
to vote against or to abstain from voting on the Reorganization Agreement. 
The Board knows of no business, other than that set forth in the Notice of 
Special Meeting of Shareholders, to be presented for consideration at the 
Meeting. However, the proxy confers discretionary authority upon the persons 
named therein to vote as they determine on other business, not currently 
contemplated, which may come before the Meeting. Abstentions and, if 
applicable, broker "non-votes" will not count as votes in favor of the 
Reorganization Agreement, and broker "non-votes" will not be deemed to be 
present at the meeting for purposes of determining whether the Reorganization 
Agreement has been approved. Broker "non-votes" are shares held in street 
name for which the broker indicates that instructions have not been received 
from the beneficial owners or other persons entitled to vote and for which 
the broker does not have discretionary voting authority. The proxy may be 
revoked at any time prior to the voting thereof by: (i) delivering written 
notice of revocation to the Secretary of National Municipal at Two World 
Trade Center, New York, New York 10048; (ii) attending the Meeting and voting 
in person; or (iii) signing and returning a new proxy (if returned and 
received in time to be voted). Attendance at the Meeting will not in and of 
itself revoke a proxy. 

   In the event that the necessary quorum to transact business or the vote 
required to approve or reject the Reorganization Agreement is not obtained at 
the Meeting, the persons named as proxies may propose one or more 
adjournments of the Meeting for a total of not more than 90 days in the 
aggregate from the Record Date to permit further solicitation of proxies. Any 
such adjournment will require the affirmative vote of the holders of a 
majority of National Municipal's shares present in person or by proxy at the 
Meeting. The persons named as proxies will vote in favor of such adjournment 
those proxies which they are entitled to vote in favor of the Reorganization 
Agreement and will vote against any such adjournment those proxies required 
to be voted against the Reorganization Agreement. 

EXPENSES OF SOLICITATION 

   All expenses of this solicitation, including the cost of preparing and 
mailing this Proxy Statement and Prospectus, will be borne by Dean Witter 
InterCapital Inc. (the "Investment Manager" or 

                                       2
<PAGE>

"InterCapital"). In addition to the solicitation of proxies by mail, proxies 
may be solicited by officers and regular employees or certain affiliates of 
National Municipal, including InterCapital and/or Dean Witter Trust Company 
("DWTC"), without compensation other than regular compensation, personally or 
by mail, telephone, telegraph or otherwise. Brokerage houses, banks and other 
fiduciaries may be requested to forward soliciting material to the beneficial 
owners of shares and to obtain authorization for the execution of proxies. 

   
   DWTC may call Shareholders to ask if they would be willing to have their 
votes recorded by telephone. The telephone voting procedure is designed to 
authenticate Shareholders' identities, to allow Shareholders to authorize the 
voting of their shares in accordance with their instructions and to confirm 
that their instructions have been recorded properly. No recommendation will 
be made as to how a Shareholder should vote on the Reorganization Agreement 
other than to refer to the recommendation of the Board. National Municipal 
has been advised by counsel that these procedures are consistent with the 
requirements of applicable law. Shareholders voting by telephone will be 
asked for their social security number or other identifying information and 
will be given an opportunity to authorize proxies to vote their shares in 
accordance with their instructions. To ensure that the Shareholders' 
instructions have been recorded correctly they will receive a confirmation of 
their instructions in the mail. A special toll-free number will be available 
in case the information contained in the confirmation is incorrect. Although 
a Shareholder's vote may be taken by telephone, each Shareholder will receive 
a copy of this Proxy Statement and Prospectus and may vote by mail using the 
enclosed proxy card. 
    

VOTE REQUIRED 

   Approval of the Reorganization Agreement by Shareholders requires the 
affirmative vote of a majority (i.e., more than 50%) of the outstanding 
shares of National Municipal represented in person or by proxy and entitled 
to vote at the Meeting, provided a quorum is present at the Meeting. If the 
Reorganization Agreement is not approved by Shareholders, National Municipal 
will continue in existence and the Board will consider alternative actions. 

                                       3
<PAGE>

                                   SYNOPSIS

   The following is a synopsis of certain information contained in or 
incorporated by reference in this Proxy Statement and Prospectus. This 
synopsis is only a summary and is qualified in its entirety by the more 
detailed information contained or incorporated by reference in this Proxy 
Statement and Prospectus and the Reorganization Agreement. Shareholders 
should carefully review this Proxy Statement and Prospectus and the 
Reorganization Agreement in their entirety and, in particular, Tax-Exempt's 
Prospectus, which is attached to this Proxy Statement and incorporated herein 
by reference. 

THE REORGANIZATION 

   The Reorganization Agreement provides for the transfer of substantially 
all the assets of National Municipal, subject to stated liabilities, to 
Tax-Exempt in exchange for the Tax-Exempt Shares. The aggregate net asset 
value of the Tax-Exempt Shares issued in the exchange will equal the 
aggregate value of the net assets of National Municipal received by 
Tax-Exempt. On or after the closing date scheduled for the Reorganization 
(the "Closing Date"), National Municipal will distribute the Tax-Exempt 
Shares received by National Municipal to Shareholders as of the Valuation 
Date (as defined below under "The Reorganization Agreement") in complete 
liquidation of National Municipal and National Municipal will thereafter be 
dissolved and deregistered under the Investment Company Act of 1940, as 
amended (the "1940 Act"). As a result of the Reorganization, each Shareholder 
will receive that number of full and fractional Tax-Exempt Shares equal in 
value to such Shareholder's pro rata interest in the net assets transferred 
to Tax-Exempt. Shareholders holding certificates representing their shares 
will not be required to surrender their certificates in connection with the 
Reorganization. However, such Shareholders will have to surrender such 
certificates in order to receive certificates representing Tax-Exempt Shares 
or to redeem, transfer or exchange the Tax-Exempt Shares received. The Board 
has determined that the interests of Shareholders will not be diluted as a 
result of the Reorganization. 

   FOR THE REASONS SET FORTH BELOW UNDER "THE REORGANIZATION--THE BOARD'S 
CONSIDERATION," THE BOARD, INCLUDING THE TRUSTEES WHO ARE NOT "INTERESTED 
PERSONS" OF NATIONAL MUNICIPAL ("INDEPENDENT TRUSTEES"), AS THAT TERM IS 
DEFINED IN THE 1940 ACT, HAS CONCLUDED THAT THE REORGANIZATION IS IN THE BEST 
INTERESTS OF NATIONAL MUNICIPAL AND ITS SHAREHOLDERS AND RECOMMENDS APPROVAL 
OF THE REORGANIZATION AGREEMENT. 

FEE TABLE 

   National Municipal and Tax-Exempt each pay expenses for management of 
their assets, distribution of their shares and other services, and those 
expenses are reflected in the net asset value per share of each such fund. 
The following table illustrates expenses and fees that a Shareholder incurred 
during National Municipal's fiscal year ended September 30, 1996 (assuming 
the waiver of fees and reimbursement of expenses were not in effect). On July 
28, 1997, Tax-Exempt began offering its shares in multiple classes, each with 
different distribution arrangements and sales charges. Class B shares of 
Tax-Exempt will be issued to National Municipal Shareholders in connection 
with the Reorganization. Accordingly, expenses of Tax-Exempt that are set 
forth in the table are for the fiscal year ended December 31, 1996 but they 
have been restated to reflect the fees and expenses applicable to Class B 
shares ("Class B Fees and Expenses"). The table below also sets forth pro 
forma fees for the surviving combined fund (Tax-Exempt) reflecting what the 
fee schedule would have been at December 31, 1996, if the Reorganization had 
been 

                                       4
<PAGE>

consummated twelve (12) months prior to that date and assuming Class B Fees 
and Expenses. Further information on the fees and expenses applicable to 
Tax-Exempt's Class B shares as well as the other three classes of Tax-Exempt 
shares is set forth herein and in Tax-Exempt's Prospectus, attached hereto 
and incorporated herein by reference. 

Shareholder Transaction Expenses 

   
<TABLE>
<CAPTION>
                                                  NATIONAL              TAX-EXEMPT              PRO FORMA 
                                                  MUNICIPAL              (CLASS B)              COMBINED 
                                                  ---------              ---------              -------- 
<S>                                                 <C>                   <C>                    <C>
Maximum Sales Charge Imposed on 
 Purchases (as a percentage of offering 
 price)....................................         None                  None(1)                None(1) 
Maximum Sales Charge Imposed on Reinvested 
 Dividends.................................         None                  None                   None 
 (as a percentage of the lesser of 
 original purchase price or redemption 
 proceeds) 
Maximum Contingent Deferred Sales Charge      
 (as a percentage of the lesser of            
 original purchase price or redemption        
 proceeds) ................................   3.00% during the       5.00% during the       5.00% during the    
                                              first year scaled      first year scaled      first year scaled   
                                              down to 1.00% during   down to 1.00% during   down to 1.00% during
                                              the third year,        the sixth year,        the sixth year,     
                                              reaching zero          reaching zero          reaching zero       
                                              thereafter             thereafter(2)          thereafter(3)       
Redemption Fees............................         None                   None                   None 
Exchange Fee (as a percentage of original 
 purchase price of redemption proceeds) ...         None                   None                   None 
</TABLE>
    

   
Annual Fund Operating Expenses (As a Percentage of Average Net Assets) 
    

   
<TABLE>
<CAPTION>

                                      NATIONAL      TAX-EXEMPT     PRO FORMA 
                                      MUNICIPAL     (CLASS B)      COMBINED 
                                      ---------     ---------      -------- 
<S>                                     <C>            <C>           <C>
Management Fees ...................     0.35%(4)       0.43%         0.42%(5) 
12b-1 Fees(6) .....................     0.59%          0.60%(7)      0.60%(7) 
Other Expenses ....................     0.25%          0.05%         0.06% 
                                        ----           ----          ----  
Total Fund Operating Expenses  ....     1.19%          1.08%         1.08% 
</TABLE>
    

- --------------
1       During Tax-Exempt's fiscal year ended December 31, 1996, shares of 
        Tax-Exempt were sold exclusively with a front-end sales charge, the 
        maximum rate of which was 4.00% of the offering price. On July 28, 
        1997, however, Tax-Exempt began offering four Classes of shares. 
        Classes B, C and D shares are sold without a front-end sales charge. 
        Class A shares are currently sold with a maximum front-end charge of 
        4.25%. 

                                       5
<PAGE>

   
2       During Tax-Exempt's fiscal year ended December 31, 1996, there was no
        contingent deferred sales charge ("CDSC") imposed upon redemptions
        and/or repurchases of shares of Tax-Exempt. However, Class B shares of
        Tax-Exempt are currently offered and subject to the CDSC set forth in
        the table. Tax-Exempt shares held by certain employee benefit plans,
        however, are subject to a different CDSC schedule (see "Purchases,
        Exchanges and Redemptions" below).
    

3       The CDSC schedule of National Municipal (with the lower maximum CDSC 
        of 3.00%) will continue to apply (after the Reorganization) to the 
        Tax-Exempt Shares acquired by a Shareholder as a result of the 
        Reorganization and, accordingly, Shareholders acquiring Tax-Exempt 
        Shares as a result of the Reorganization will not pay a higher CDSC 
        on redemption of the Tax-Exempt Shares than the rate currently in 
        effect for redemptions of their National Municipal shares so long as 
        such Shareholder does not (i) exchange the Tax-Exempt Shares for 
        shares of another Dean Witter Fund which has a higher maximum CDSC 
        rate than 3.00% (a "Higher CDSC Fund") or (ii) having exchanged to 
        Dean Witter Global Short-Term Income Fund Inc. or any Exchange Fund 
        (as such term is defined herein), re-exchange back to Tax-Exempt 
        after the Reorganization. Under such circumstances, the CDSC schedule 
        of the Higher CDSC Fund acquired in the exchange will become 
        applicable upon the redemption of such fund's shares, or in the case 
        of shares of any of the Exchange Funds or Dean Witter Global 
        Short-Term Income Fund Inc. acquired in an exchange and then 
        subsequently re-exchanged back into Tax-Exempt, the CDSC applicable 
        to Tax-Exempt shares will be charged upon the redemption of any such 
        shares (see "Purchases, Exchanges and Redemptions" below). 

4       Pursuant to an undertaking, the Investment Manager assumed all 
        expenses (except for any brokerage and 12b-1 fees) and waived the 
        compensation provided for in its Management Agreement until December 
        31, 1995. From January 1, 1996 through June 30, 1997, InterCapital 
        undertook to continue to waive management fees and to continue to 
        assume expenses (except for brokerage and 12b-1 fees) to the extent 
        such fees and expenses exceeded, on an annualized basis, 0.50% of the 
        daily net assets of the fund. As of July 1, 1997, InterCapital has 
        ceased voluntarily assuming expenses and waiving management fees for 
        National Municipal. Taking the waiver of fees and assumption of 
        expenses into effect, actual Management Fees for the fiscal year 
        ended September 30, 1996 were 0.20% and actual Other Expenses were 
        0.18%. 

   
5       This rate reflects the anticipated lower advisory fee of Tax-Exempt 
        obtained by reaching a breakpoint in the advisory fee upon the 
        combination of the two funds based upon National Municipal's net 
        assets as of September 30, 1996 and Tax-Exempt's net assets as of 
        December 31, 1996, thus, a scaling down of the advisory fee to the 
        effective advisory fee rate shown. 
    

6       The 12b-1 fee is accrued daily and payable monthly. The 12b-1 fee is, 
        in the case of National Municipal, calculated as a percentage of the 
        lesser of (a) the average daily net sales or (b) the average daily 
        net assets of the fund and, in the case of Tax-Exempt, calculated as 
        a percentage of average daily net assets. A portion of the 12b-1 fee 
        equal to 0.15% of average daily net assets is characterized as a 
        service fee within the meaning of the National Association of 
        Securities Dealers, Inc. ("NASD") guidelines. 

7       For the fiscal year ended December 31, 1996, there was no 12b-1 fee 
        paid by Tax-Exempt. However, on June 30, 1997, a 12b-1 fee calculated 
        at the annual rate of 0.60% of the average daily net assets of Class 
        B was authorized for Class B shares of Tax-Exempt to take effect upon 
        implementation of the multiple class distribution structure on July 
        28, 1997. The 12b-1 fee rate shown in the table assumes the 12b-1 fee 
        was in effect for Tax-Exempt during its fiscal year ended December 
        31, 1996. The actual total fund operating expense ratio for 
        Tax-Exempt during the fund's fiscal year ended December 31, 1996 was 
        0.48% (this rate reflects that no 12b-1 fees were incurred during 
        this period). 

                                       6
<PAGE>

   
Example 
    

   To attempt to show the effect of these expenses on an investment over 
time, the hypotheticals shown below have been created. Assuming that an 
investor makes a $1,000 investment in either National Municipal or Class B 
shares of Tax-Exempt or the new combined fund, that the annual return is 5% 
and that the operating expenses for each fund are the ones shown in the chart 
above; if the investment was redeemed at the end of each period shown below, 
the investor would incur the following expenses by the end of each period 
shown: 

<TABLE>
<CAPTION>
                               1 YEAR   3 YEARS   5 YEARS   10 YEARS 
                               ------   -------   -------   -------- 
<S>                             <C>       <C>       <C>       <C>
National Municipal...........   $42       $48       $65       $144 
Tax-Exempt (Class B).........   $61       $64       $80       $132 
Pro Forma Combined (Class 
 B)..........................   $61       $64       $80       $132 
</TABLE>

If such investment was not redeemed, the investor would incur the following 
expenses: 

<TABLE>
<CAPTION>
                               1 YEAR   3 YEARS   5 YEARS   10 YEARS 
                               ------   -------   -------   -------- 
<S>                             <C>       <C>       <C>       <C>
National Municipal...........   $12       $38       $65       $144 
Tax-Exempt (Class B).........   $11       $34       $60       $132 
Pro Forma Combined (Class 
 B)..........................   $11       $34       $60       $132 
</TABLE>

   
   THE ABOVE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR 
FUTURE EXPENSES OR PERFORMANCE. ACTUAL OPERATING EXPENSES MAY BE GREATER OR 
LESS THAN THOSE SHOWN. Long-term Shareholders of National Municipal or Class 
B shareholders of Tax-Exempt may pay more in sales charges including 
distribution fees than the economic equivalent of the maximum front-end sales 
charges permitted by the NASD. 
    

TAX CONSEQUENCES OF THE REORGANIZATION 

   As a condition to the Reorganization, National Municipal will receive an 
opinion of Gordon Altman Butowsky Weitzen Shalov & Wein to the effect that 
the Reorganization will constitute a tax-free reorganization for federal 
income tax purposes, and that no gain or loss will be recognized by National 
Municipal or the shareholders of National Municipal for Federal income tax 
purposes as a result of the transactions included in the Reorganization. For 
further information about the tax consequences of the Reorganization, see 
"The Reorganization -- Tax Aspects of the Reorganization" below. 

COMPARISON OF NATIONAL MUNICIPAL AND TAX-EXEMPT 

   INVESTMENT OBJECTIVES AND POLICIES. National Municipal and Tax-Exempt have 
an identical investment objective, which is to seek a high level of current 
income which is exempt from federal income tax, consistent with preservation 
of capital. National Municipal and Tax-Exempt seek to achieve their 
investment objective by investing at least 75% of their respective total 
assets in: (a) Municipal Bonds which are rated at the time of purchase within 
the three highest grades by Moody's Investors Service, Inc. ("Moody's") or 
Standard & Poor's Corporation ("Standard & Poor's"); (b) Municipal Notes 
which at the time of purchase are rated in the two highest grades by Moody's 
or Standard & Poor's, or if not rated, have outstanding one or more issues of 
Municipal Bonds rated as set forth in clause (a); and (c) Municipal 
Commercial Paper which at the time of purchase are rated P-1 by Moody's or 
A-1 by Standard & Poor's. 

                                       7
<PAGE>

   
In addition, Tax-Exempt has a policy of investing at least 80% of its total
assets in tax-exempt securities which include Municipal Bonds and Municipal
Notes (together, "Municipal Obligations") and Municipal Commercial Paper
("Municipal Paper"), excluding tax-exempt securities which subject shareholders
to the federal alternative minimum tax ("AMT"). As such, the remaining 20% of
Tax-Exempt's total assets may be invested in Tax-Exempt securities that subject
investors to the AMT; whereas National Municipal may invest without limit in
Municipal Obligations (in which the fund may invest) that subject investors to
the AMT. Both funds also may invest up to 25% of their respective total assets
in Municipal Obligations (and, in the case of Tax-Exempt, Municipal Paper)
which are unrated or, if rated are not within the categories of Moody's or
Standard & Poor's listed above in clauses (a) and (b) (and, in the case of
Tax-Exempt, clause (c)). Both funds do not intend to invest more than 5% of
their respective net assets in Municipal Bonds which are rated, or deemed, by
the Investment Manager to be below investment grade. Additionally, up to 20% of
Tax-Exempt's total assets and up to 25% of National Municipal's total assets,
may be invested in taxable money market instruments under any one or more of
the following circumstances: (i) pending investment of proceeds of sale of fund
shares or of portfolio securities; (ii) pending settlement of purchases of
portfolio securities; and (iii) to maintain liquidity for the purpose of
meeting anticipated redemptions. In addition, up to 20% of National Municipal's
total assets and up to 25% of Tax Exempt's total assets may be invested in
taxable securities to maintain a defensive posture when, in the opinion of the
Investment Manager, it is advisable to do so. With respect to National
Municipal, the fund seeks to maintain under normal circumstances a dollar
weighted average maturity in excess of twenty years. Tax-Exempt does not have a
specific policy as to the portfolio's weighted average maturity.
    

   The investment policies of both funds are similar and the principal 
differences between them are further described under "Comparison of 
Investment Objectives, Policies and Restrictions" below. 

   
   Other than Tax-Exempt's policy that, under normal market conditions, at 
least 80% of its net assets will be invested in tax-exempt securities, the 
investment policies of both National Municipal and Tax-Exempt are not 
fundamental and may be changed by their respective Boards of Trustees. 

   INVESTMENT MANAGEMENT AND DISTRIBUTION PLAN FEES. National Municipal and 
Tax-Exempt obtain investment management services from InterCapital. With 
respect to National Municipal, the fund pays InterCapital monthly 
compensation calculated daily at the annual rate of 0.35% of the fund's 
average net assets. Pursuant to an undertaking, InterCapital assumed all the 
fund's expenses (except for any brokerage and 12b-1 fees) and waived the 
compensation provided for in its Management Agreement until December 31, 
1995. From January 1, 1996 through June 30, 1997, InterCapital undertook to 
continue to waive management fees and to continue to assume expenses (except 
for brokerage and 12b-1 fees) to the extent such fees and expenses exceeded, 
on an annualized basis, 0.50% of the average daily net assets of the fund. As 
a result of such waiver and assumption of expenses, management fees for the 
fiscal year ended September 30, 1996 amounted to a rate of 0.27% of the 
fund's average daily net assets. As of July 1, 1997, InterCapital has ceased 
voluntarily assuming expenses and waiving management fees for National 
Municipal. With respect to Tax-Exempt, the fund pays InterCapital monthly 
compensation calculated daily by applying the annual rate of: 0.50% to the 
fund's first $500 million of average net assets; 0.425% to the fund's next 
$250 million of average net assets; 0.375% to the fund's next $250 million of 
average net assets; 0.35% to the fund's next $250 million of average net 
assets; and 0.325% to the fund's average net assets exceeding $1.25 billion. 
    

                                       8
<PAGE>

   Both National Municipal and Tax-Exempt have adopted distribution plans 
(each, a "Plan") pursuant to Rule 12b-1 under the 1940 Act. Pursuant to 
National Municipal's Plan, the fund pays to Dean Witter Distributors Inc. 
(the "Distributor") a fee ("12b-1 fee"), which is accrued daily and payable 
monthly, at the annual rate of 0.60% of the lesser of (a) the average daily 
net sales of such fund's shares, or (b) the average daily net assets of the 
fund. The 12b-1 fee applicable to Class B shares of Tax-Exempt pursuant to 
its Plan is accrued daily and payable monthly at the annual rate of 0.60% of 
average daily net assets allocated to that Class. For further information 
relating to the 12b-1 fees applicable to Class B shares as well as 
Tax-Exempt's other Classes of shares, see the section entitled "Purchase of 
Fund Shares" in Tax-Exempt's Prospectus, attached hereto. 12b-1 fees 
compensate the Distributor for the services provided and the expenses borne 
by the Distributor and others in distribution of the funds' shares. The 
Distributor also receives the proceeds of any CDSC paid by the funds' 
shareholders at the time of redemption. (National Municipal's and 
Tax-Exempt's respective CDSC schedules are set forth below under "Purchases, 
Exchanges and Redemptions.") 

   OTHER SIGNIFICANT FEES. Both National Municipal and Tax-Exempt pay 
additional fees in connection with their operations, including legal, 
auditing, transfer agent and custodial fees. See "Synopsis -- Fee Table" 
above for the percentage of average net assets represented by such "Other 
Expenses." 

   PURCHASES, EXCHANGES AND REDEMPTIONS. National Municipal continuously 
issues its shares to investors at a price equal to net asset value at the 
time of such issuance. However, redemptions and/or repurchases are subject 
under most circumstances to a CDSC. Likewise, Class B shares of Tax-Exempt 
are currently offered at net asset value and redemptions and/or repurchases 
are subject under most circumstances to a CDSC. The following are the 
respective CDSC schedules applicable to each of National Municipal and Class 
B shares of Tax-Exempt. Class B shares held by certain qualified 
employer-sponsored benefit plans are subject to a reduced CDSC schedule. 

<TABLE>
<CAPTION>
YEAR SINCE PURCHASE PAYMENT MADE       NATIONAL MUNICIPAL     TAX-EXEMPT 
- --------------------------------       ------------------     ---------- 
<S>                                            <C>                <C>
First ...............................          3.0%               5.0% 
Second ..............................          2.0%               4.0% 
Third ...............................          1.0%               3.0% 
Fourth...............................          none               2.0% 
Fifth................................          none               2.0% 
Sixth................................          none               1.0% 
Seventh and thereafter...............          none               none 
</TABLE>

   The lower CDSC schedule of National Municipal will continue to apply to 
Shareholders only with respect to the Tax-Exempt Shares acquired in the 
Reorganization. However, the lower CDSC schedule will not apply if such 
Shareholder: (i) exchanges his/her Tax-Exempt Shares after the Reorganization 
for a fund with a higher CDSC schedule than National Municipal (a "Higher 
CDSC Fund") or (ii) having exchanged to Dean Witter Global Short-Term Income 
Fund Inc., Dean Witter Short-Term U.S. Treasury Trust, Dean Witter Limited 
Term Municipal Trust, Dean Witter Short-Term Bond Fund, Dean Witter 
Intermediate Term U.S. Treasury Trust and five Dean Witter money market funds 
(collectively, the "Exchange Funds"), he/she re-exchanges back into 
Tax-Exempt after the Reorganization. Under such circumstances, the CDSC 
schedule applicable to the Higher CDSC Fund shares acquired in the exchange 
will apply to redemptions of such fund's shares or, in the case of shares of 
any of the Exchange Funds acquired in an exchange and then subsequently 
re-exchanged back into Tax-Exempt, the CDSC schedule for Tax-Exempt (set 
forth in the table above) will apply to redemptions of any of such shares. 

                                       9
<PAGE>

   The CDSC charge is paid to the Distributor. Shares of Tax-Exempt and 
National Municipal are distributed by the Distributor and offered by Dean 
Witter Reynolds Inc. and other dealers who have entered into selected dealer 
agreements with the Distributor. For further information relating to the CDSC 
schedules applicable to Class B and the other Classes of Tax-Exempt's shares, 
see the section entitled "Purchase of Fund Shares" in Tax-Exempt's 
Prospectus. 

   Shares of each Class of Tax-Exempt may be exchanged for shares of the same 
Class of any other Dean Witter Fund that offers its shares in more than one 
Class (the "Multi-Class Funds") or Dean Witter Global Short-Term Income Fund 
Inc. and Dean Witter High Income Securities ("CDSC Funds") without the 
imposition of an exchange fee. National Municipal shares also may be 
exchanged for Class B shares of any Multi-Class Fund or for shares of either 
CDSC Fund. Both funds may be exchanged for shares of any of the Exchange 
Funds. With respect to National Municipal and Tax-Exempt, no CDSC is imposed 
at the time of any exchange, although any applicable CDSC will be imposed 
upon ultimate redemption. During the period of time a shareholder remains in 
an Exchange Fund, the holding period (for purposes of determining the CDSC 
rate) is frozen. Both National Municipal and Tax-Exempt provide telephone 
exchange privileges to their shareholders. For greater details relating to 
exchange privileges applicable to Tax-Exempt, see the section entitled 
"Shareholder Services" in Tax-Exempt's Prospectus. 

   Shareholders of National Municipal and Tax-Exempt may redeem their shares 
for cash at any time at the net asset value per share next determined; 
however, such redemption proceeds may be reduced by the amount of any 
applicable CDSC. Both National Municipal and Tax-Exempt offer a reinstatement 
privilege whereby a shareholder who has not previously exercised such 
privilege whose shares have been redeemed or repurchased may, within thirty 
days, in the case of National Municipal, and within thirty-five days, in the 
case of Tax-Exempt, after the date of redemption or repurchase, reinstate any 
portion or all of the proceeds thereof in shares of National Municipal or 
Class B shares of Tax-Exempt, respectively, and receive a pro rata credit for 
any CDSC paid in connection with such redemption or repurchase. National 
Municipal and Tax-Exempt may redeem involuntarily, at net asset value, most 
accounts valued at less than $100. 

   DIVIDENDS. Dividends from both National Municipal's and Tax-Exempt's 
anticipated net investment income are declared daily and paid monthly and net 
short-term capital gains and long-term capital gains distributions, if any, 
are paid at least annually. Dividends and capital gains distributions of both 
National Municipal and Tax-Exempt are automatically reinvested in additional 
shares at net asset value unless the shareholder elects to receive cash. 

                            PRINCIPAL RISK FACTORS

   The net asset value of Tax-Exempt's and National Municipal's shares will 
fluctuate due to various factors, including, principally, changes in 
prevailing interest rates and the ability of the issuers of the funds' 
portfolio securities to pay interest and principal on such obligations on a 
timely basis. Generally, a rise in interest rates will result in a decrease 
in the funds' respective net asset values per share, while a drop in interest 
rates will result in an increase in the funds' net asset values. 

   Both funds invest in Municipal Bonds rated (or deemed to be rated) either 
Baa by Moody's or BBB by Standard & Poor's, which have speculative 
characteristics and, therefore, changes in economic conditions or other 
circumstances are more likely to weaken their capacity to make principal and 
interest payments than would be the case with investments in securities with 
higher credit ratings. 

                                      10
<PAGE>

   Both funds may also invest in futures and options, which may be considered 
speculative in nature and which may involve greater risks than those 
customarily assumed by certain other investment companies which do not invest 
in such instruments. 

   The foregoing discussion is a summary of the principal risk factors. For a 
more complete discussion of the risks of each fund, see "Investment Objective 
and Policies -- Risk Considerations and Investment Practices" in each fund's 
Prospectus. 

                              THE REORGANIZATION 

THE PROPOSAL 

   The Board of Trustees of National Municipal, including the Independent 
Trustees, having reviewed National Municipal's financial position and the 
prospects for achieving economies of scale through the Reorganization, 
determined that the Reorganization is in the best interests of National 
Municipal and its shareholders and that the interests of National Municipal's 
shareholders will not be diluted as a result thereof, recommends approval of 
the Reorganization by Shareholders. The Board believes that a combination of 
National Municipal with Tax-Exempt is consistent with National Municipal's 
stated investment objectives. 

THE BOARD'S CONSIDERATION 

   At a meeting held on June 30, 1997, the Board, including all of the 
Independent Trustees, unanimously approved the Reorganization Agreement and 
determined to recommend that Shareholders of National Municipal approve the 
Reorganization Agreement. In reaching this decision, the Board made an 
extensive inquiry into a number of factors, particularly the comparative 
expenses to be incurred in the operations of National Municipal and Class B 
shares of Tax-Exempt. The Board also considered other factors, including, but 
not limited to: the comparative investment performance and past growth in 
assets of National Municipal and Tax-Exempt; the compatibility of the 
investment objectives, policies, restrictions and portfolios of National 
Municipal and Tax-Exempt; the terms and conditions of the Reorganization 
which would affect the price of shares to be issued in the Reorganization; 
the tax-free nature of the Reorganization; and any direct or indirect costs 
to be incurred by National Municipal and Tax-Exempt in connection with the 
Reorganization. 

   In recommending the Reorganization to Shareholders, the Board of National 
Municipal considered that the Reorganization would have the following 
benefits for Shareholders: 

   1. Once the Reorganization is consummated, the expenses which would be 
borne by Class B shareholders of the combined fund should be lower on a 
percentage basis than the actual expenses per share of National Municipal 
(without taking the waiver of fees and reimbursement of expenses into 
effect). This is because the Reorganization would result in Shareholders 
becoming shareholders of a combined larger fund, and, thus, economies of 
scale are achieved as various fixed expenses (e.g., auditing and legal) can 
be spread over a larger number of shares. The Board noted that National 
Municipal's expense ratio, assuming it had borne all of its expenses for its 
fiscal year ended September 30, 1996 was 1.19%, whereas the expense ratio for 
Tax-Exempt was 1.08% (based on the fiscal year ended December 31, 1996 
assuming a 0.60% 12b-1 fee, as well as the other assumptions described in the 
"Fee Table" above). The Board further noted that the Combined Fund is 
expected to have a lower expense ratio than both funds currently do (taking 
into account the other assumptions described in the "Fee Table" above). See 
"Synopsis -- Fee Table," above. 

                                      11
<PAGE>

   In addition, the Board noted that Shareholders who remain invested in 
Tax-Exempt for approximately ten years from the Closing Date (as defined 
below) will receive an additional benefit as a result of the automatic 
conversion of Class B shares of Tax-Exempt into Class A shares of Tax-Exempt 
after such period. As discussed more fully in Tax-Exempt's Prospectus, 
attached hereto, once Shareholders are converted to Class A they will be 
subject to the Class's 12b-1 fee of only 0.25% of the average daily net 
assets of that Class. For greater details regarding the conversion feature, 
including the method by which the 10 year period is calculated and the 
treatment of reinvested dividends, see "Purchase of Fund Shares" in 
Tax-Exempt's Prospectus. 

   2. Shareholders would have a continued participation in the municipal 
markets through investment in Tax-Exempt, which has an identical investment 
objective and substantially similar investment policies and restrictions to 
National Municipal. Upon consummation of the Reorganization, the lower CDSC 
schedule of National Municipal will continue to apply (with respect to the 
Tax-Exempt shares acquired in the Reorganization) except under certain 
circumstances in which such Tax-Exempt Shares are exchanged for another fund 
as described herein under the section entitled "Comparison of National 
Municipal and Tax-Exempt -- Purchases, Exchanges and Redemptions." 

   3. Shareholders will be able to purchase shares of Tax-Exempt at net asset 
value and pursue similar investment goals in a combined larger and more 
economically efficient fund. 

   
   4. The Board also took into consideration that effective July 28, 1997, 
Tax-Exempt Shares will also be available to certain investors at net asset 
value and, therefore, absent the Reorganization, Tax-Exempt will compete for 
investor funds directly with National Municipal. The Reorganization should 
allow for more concentrated selling efforts to the benefit of both National 
Municipal and Tax-Exempt shareholders and avoid the inefficiencies associated 
with the operation and distribution of two substantially similar funds. 
    

   5. The Reorganization will constitute a tax-free reorganization for 
federal income tax purposes, and no gain or loss will be recognized by 
National Municipal or its Shareholders for federal income tax purposes as a 
result of transactions included in the Reorganization. 

   The Board of Trustees of Tax-Exempt, including a majority of such Trustees 
who are not "interested persons" of Tax-Exempt, also have determined that the 
Reorganization is in the best interests of Tax-Exempt and its shareholders 
and that the interests of existing shareholders of Tax-Exempt will not be 
diluted as a result thereof. 

THE REORGANIZATION AGREEMENT 

   
   The terms and conditions under which the Reorganization would be 
consummated, as summarized below, are set forth in the Reorganization 
Agreement. This summary is qualified in its entirety by reference to the 
Reorganization Agreement, a copy of which is attached as Exhibit A to this 
Proxy Statement and Prospectus. 
    

   The Reorganization Agreement provides that (i) National Municipal will 
transfer all of its assets, including portfolio securities, cash (other than 
cash amounts retained by National Municipal as a "Cash Reserve" in the amount 
sufficient to discharge its liabilities not discharged prior to the Valuation 
Date (as defined below) and for expenses of the dissolution), cash 
equivalents and receivables to Tax-Exempt on the Closing Date in exchange for 
the assumption by Tax-Exempt of National Municipal's stated liabilities, 

                                      12
<PAGE>

including all expenses, costs, charges and reserves, as reflected on an 
unaudited statement of assets and liabilities of National Municipal prepared 
by the Treasurer of National Municipal as of the Valuation Date (as defined 
below) in accordance with generally accepted accounting principles 
consistently applied from the prior audited period, and the delivery of 
Tax-Exempt Shares, (ii) such Tax-Exempt Shares would be distributed to the 
Shareholders of National Municipal on the Closing Date or as soon as 
practicable thereafter, (iii) National Municipal would be dissolved and (iv) 
the outstanding shares of National Municipal would be canceled. 

   The number of Tax-Exempt Shares to be delivered to National Municipal will 
be determined by dividing the value of National Municipal assets acquired by 
Tax-Exempt (net of stated liabilities assumed by Tax-Exempt) by the net asset 
value of a Tax-Exempt Share; these values will be calculated as of 4:00 p.m. 
New York City time on the third day that the New York Stock Exchange is open 
for business following the receipt of the requisite approval by the 
shareholders of National Municipal of the Reorganization Agreement or at such 
other time as National Municipal and Tax-Exempt may agree (the "Valuation 
Date"). As an illustration, if on the Valuation Date, National Municipal were 
to have securities with a market value of $95,000 and cash in the amount of 
$10,000 (of which $5,000 was to be retained by it as the Cash Reserve), the 
value of the assets which would be transferred to Tax-Exempt would be 
$100,000. If the net asset value per share of Tax-Exempt were $10 per share 
at the close of business on the Valuation Date, the number of shares to be 
issued would be 10,000 ($100,000 (divided by) $10). These 10,000 Class B 
shares of Tax-Exempt would be distributed to the former shareholders of 
National Municipal. This example is given for illustration purposes only and 
does not bear any relationship to the dollar amounts or shares expected to be 
involved in the Reorganization. 

   On the Closing Date or as soon as practicable thereafter, National 
Municipal will distribute pro rata to its Shareholders of record as of the 
close of business on the Valuation Date, the Tax-Exempt Shares it receives. 
Tax-Exempt will cause its transfer agent to credit and confirm an appropriate 
number of Tax-Exempt Shares to each Shareholder. Certificates for Tax-Exempt 
Shares will be issued upon written request of a Shareholder but only for 
whole shares, with fractional shares credited to the name of the Shareholder 
on the books of Tax-Exempt. Such Shareholders who wish certificates 
representing their Tax-Exempt Shares must, after receipt of their 
confirmations, make a written request to Tax-Exempt's transfer agent, Dean 
Witter Trust Company, Harborside Financial Center, Jersey City, New Jersey 
07311. Shareholders holding certificates representing their shares will not 
be required to surrender their certificates in connection with the 
Reorganization. However, such Shareholders will have to surrender such 
certificates (or provide indemnities reasonably acceptable to Tax-Exempt in 
respect of lost certificates) in order to receive certificates representing 
Tax-Exempt Shares or to redeem, transfer or exchange the Tax-Exempt Shares 
received. 

   
   The Closing Date will be the next business day following the Valuation 
Date. The consummation of the Reorganization is contingent upon the approval 
of the Reorganization by the shareholders of National Municipal and the 
receipt of the other opinions and certificates set forth in Sections 6, 7 and 
8 of the Reorganization Agreement and the occurrence of the events described 
in those Sections, certain of which may be waived by National Municipal or 
Tax-Exempt. The Reorganization Agreement may be amended in any mutually 
agreeable manner, except that no amendment may be made subsequent to the 
Meeting which would detrimentally affect the value of the shares of 
Tax-Exempt to be distributed. InterCapital will bear all of the expenses 
associated with the Reorganization. Management estimates that such expenses 
associated with the Reorganization will not exceed $160,000. 
    

                                      13
<PAGE>

   The Reorganization Agreement may be terminated and the Reorganization 
abandoned at any time, before or after approval by National Municipal's 
Shareholders by mutual consent of National Municipal and Tax-Exempt. In 
addition, either party may terminate the Reorganization Agreement upon the 
occurrence of a material breach of the Reorganization Agreement by the other 
party or if, by January 31, 1998, any condition set forth in the 
Reorganization Agreement has not been fulfilled or waived by the party 
entitled to its benefits. 

   Under the Reorganization Agreement, within one year after the Closing 
Date, National Municipal shall: either pay or make provision for all of its 
liabilities and distribute any remaining amount of the Cash Reserve (after 
paying or making provision for such liabilities and the estimated cost of 
making the distribution) to former shareholders of National Municipal that 
received Tax-Exempt Shares. National Municipal shall be dissolved and 
deregistered as an investment company promptly following the distributions of 
shares of Tax-Exempt to Shareholders of record of National Municipal. 

   The effect of the Reorganization is that Shareholders who vote their 
shares in favor of the Reorganization Agreement are electing to sell their 
shares of National Municipal (at net asset value on the Valuation Date 
calculated after subtracting the Cash Reserve) and reinvest the proceeds in 
Tax-Exempt Shares at net asset value and without recognition of taxable gain 
or loss for Federal income tax purposes. See "Tax Aspects of the 
Reorganization" below. As noted in "Tax Aspects of the Reorganization" below, 
if National Municipal recognizes net gain from the sale of securities prior 
to the Closing Date, such gain, to the extent not offset by capital loss 
carryovers, will be distributed to Shareholders prior to the Closing Date and 
will be taxable to Shareholders as capital gain. 

   Shareholders will continue to be able to redeem their shares at net asset 
value next determined after receipt of the redemption request (subject to any 
applicable CDSC) until the close of business on the business day next 
preceding the Closing Date. Redemption requests received by National 
Municipal thereafter will be treated as requests for redemption of shares of 
Tax-Exempt. 

TAX ASPECTS OF THE REORGANIZATION 

   
   At least one but not more than 20 business days prior to the Valuation 
Date, National Municipal will declare and pay a dividend or dividends which, 
together with all previous such dividends, will have the effect of 
distributing to Shareholders all of National Municipal's investment company 
taxable income for all periods since inception of National Municipal through 
and including the Valuation Date (computed without regard to any dividends 
paid deduction), and all of National Municipal's net capital gain, if any, 
realized in such periods (after reduction for any capital loss carryforward). 

   The Reorganization is intended to qualify for Federal income tax purposes 
as a tax-free reorganization under Section 368(a)(1)(C) of the Internal 
Revenue Code of 1986, as amended (the "Code"). National Municipal and 
Tax-Exempt have represented that, to their best knowledge, there is no plan 
or intention by Shareholders to redeem, sell, exchange or otherwise dispose 
of a number of Tax-Exempt Shares received in the transaction that would 
reduce Shareholders' ownership of Tax-Exempt Shares to a number of shares 
having a value, as of the Closing Date, of less than 50% of the value of all 
of the formerly outstanding National Municipal shares as of the same date. 
National Municipal and Tax-Exempt have each further represented that, as of 
the Closing Date, National Municipal and Tax-Exempt will qualify as regulated 
investment companies. 
    

                                      14
<PAGE>

   As a condition to the Reorganization, National Municipal and Tax-Exempt 
will receive an opinion of Gordon Altman Butowsky Weitzen Shalov & Wein that, 
based on certain assumptions, facts, the terms of the Reorganization 
Agreement and additional representations set forth in the Reorganization 
Agreement or provided by National Municipal and Tax-Exempt: 

   
   1. The transfer of substantially all of National Municipal's assets in 
exchange for the Tax-Exempt Shares and the assumption by Tax-Exempt of 
certain stated liabilities of National Municipal followed by the distribution 
by National Municipal of the Tax-Exempt Shares to Shareholders in exchange 
for their National Municipal shares will constitute a "reorganization" within 
the meaning of Section 368(a)(1)(C) of the Code, and National Municipal and 
Tax-Exempt will each be a "party to a reorganization" within the meaning of 
Section 368 (b) of the Code; 
    

   2. No gain or loss will be recognized by Tax-Exempt upon the receipt of 
the assets of National Municipal solely in exchange for the Tax-Exempt Shares 
and the assumption by Tax-Exempt of the stated liabilities of National 
Municipal; 

   3. No gain or loss will be recognized by National Municipal upon the 
transfer of the assets of National Municipal to Tax-Exempt in exchange for 
the Tax-Exempt Shares and the assumption by Tax-Exempt of the stated 
liabilities or upon the distribution of Tax-Exempt Shares to Shareholders in 
exchange for their National Municipal shares; 

   4. No gain or loss will be recognized by Shareholders upon the exchange of 
the shares of National Municipal for the Tax-Exempt Shares; 

   5. The aggregate tax basis for the Tax-Exempt Shares received by each of 
the Shareholders pursuant to the reorganization will be the same as the 
aggregate tax basis of the shares in National Municipal held by each such 
Shareholder immediately prior to the reorganization; 

   6. The holding period of the Tax-Exempt Shares to be received by each 
Shareholder will include the period during which the shares in National 
Municipal surrendered in exchange therefor were held (provided such shares in 
National Municipal were held as capital assets on the date of the 
Reorganization); 

   7. The tax basis of the assets of National Municipal acquired by 
Tax-Exempt will be the same as the tax basis of such assets to National 
Municipal immediately prior to the Reorganization; and 

   8. The holding period of the assets of National Municipal in the hands of 
Tax-Exempt will include the period during which those assets were held by 
National Municipal. 

   The Reorganization will be treated as a "change in ownership" under 
Section 382 of the Code. It is not anticipated that any resulting limitations 
on the use of any capital loss carryovers of National Municipal will be 
material. In addition, the economic benefit of any capital loss carryovers of 
National Municipal would be available to shareholders of the combined entity 
with a resulting benefit to Tax-Exempt shareholders. It is not anticipated 
that any such benefit will be material. 

   SHAREHOLDERS SHOULD CONSULT THEIR TAX ADVISORS REGARDING THE EFFECT, IF 
ANY, OF THE PROPOSED TRANSACTION IN LIGHT OF THEIR INDIVIDUAL CIRCUMSTANCES. 
BECAUSE THE FOREGOING DISCUSSION ONLY RELATES TO THE FEDERAL INCOME TAX 
CONSEQUENCES OF THE PROPOSED TRANSACTION, SHAREHOLDERS SHOULD ALSO CONSULT 
THEIR TAX ADVISORS AS TO STATE AND LOCAL TAX CONSEQUENCES, IF ANY, OF THE 
PROPOSED TRANSACTION. 

                                      15
<PAGE>

DESCRIPTION OF SHARES 

   
   Class B shares of Tax-Exempt to be issued pursuant to the Reorganization 
Agreement will, when issued, be fully paid and non-assessable by Tax-Exempt 
and transferable without restrictions and will have no preemptive rights. As 
discussed above, Class B shares of Tax-Exempt also have a conversion feature 
pursuant to which approximately ten (10) years after the date of the original 
purchase of shares, the shares will convert automatically to Class A shares, 
based on the relative net asset values of the two Classes. For greater 
details regarding the conversion feature, including the method by which the 
10 year period is calculated and the treatment of reinvested dividends, see 
"Purchase of Fund Shares" in Tax-Exempt's Prospectus attached hereto. 
    

CAPITALIZATION TABLE (UNAUDITED) 

   The following table sets forth the capitalization of Tax-Exempt and 
National Municipal as of December 31, 1996 and on a pro forma combined basis 
as if the Reorganization had occurred on that date: 

<TABLE>
<CAPTION>
                                                         NET ASSET 
                                             SHARES        VALUE 
                             NET ASSETS    OUTSTANDING   PER SHARE 
                             ----------    -----------   --------- 
<S>                         <C>             <C>            <C>
National Municipal......... $   84,298,410    7,924,172    $10.64 
Tax-Exempt ................ $1,190,033,990  101,083,561    $11.77 
Combined Fund (pro forma)   $1,274,332,400  108,245,703    $11.77 
</TABLE>

APPRAISAL RIGHTS 

   Shareholders will have no appraisal rights in connection with the 
Reorganization. 

        COMPARISON OF INVESTMENT OBJECTIVE, POLICIES AND RESTRICTIONS 

INVESTMENT OBJECTIVES AND POLICIES 

   
   National Municipal and Tax-Exempt have an identical investment objective, 
which is to seek a high level of current income exempt from federal income 
tax, consistent with preservation of capital. National Municipal and 
Tax-Exempt each seeks to achieve its investment objective by investing at 
least 75% of its total assets in: (a) Municipal Bonds which are rated at the 
time of purchase within the three highest grades by Moody's or Standard & 
Poor's; (b) Municipal Notes which at the time of purchase are rated in the 
two highest grades by Moody's or Standard & Poor's, or if not rated, have 
outstanding one or more issues of Municipal Bonds rated as set forth in 
clause (a); and (c) Municipal Paper which at the time of purchase are rated 
P-1 by Moody's or A-1 by Standard & Poor's. In addition, Tax-Exempt has a 
policy of investing at least 80% of its total assets in tax-exempt securities
which include Municipal Obligations and Municipal Paper, excluding tax-exempt
securities that subject shareholders to the AMT. As such, the remaining 20% of
Tax-Exempt's total assets may be invested in tax-exempt securities that subject
investors to the AMT; whereas National Municipal may invest without limit in
Municipal Obligations (in which the fund may invest) that subject investors to
the AMT. Both funds may also invest up to 25% of their respective total assets
in Municipal Obligations (and, in the case of Tax-Exempt, Municipal Paper)
which are unrated or, if rated are not within the categories of Moody's or
Standard & Poor's listed above in
    

                                      16
<PAGE>

clauses (a) and (b) (and, in the case of Tax-Exempt, clause (c)). Both funds 
do not intend to invest more than 5% of their respective net assets in 
Municipal Bonds which are rated, or deemed by the Investment Manager to be, 
below investment grade. Additionally, up to 20% of Tax-Exempt's total assets 
and up to 25% of National Municipal's total assets, may be invested in 
taxable money market instruments under any one or more of the following 
circumstances: (i) pending investment of proceeds of sale of fund shares or 
of portfolio securities; (ii) pending settlement of purchases of portfolio 
securities; and (iii) to maintain liquidity for the purpose of meeting 
anticipated redemptions. In addition, up to 20% of National Municipal's total 
assets and up to 25% of Tax-Exempt's total assets may be invested in taxable 
securities to maintain a defensive posture when, in the opinion of the 
Investment Manager, it is advisable to do so. With respect to National 
Municipal, the fund seeks to maintain under normal circumstances a dollar 
weighted average maturity in excess of twenty years. Tax-Exempt does not have 
a specific policy as to the portfolio's weighted average maturity. 

   
   Both funds may invest a portion of the fixed-income securities purchased 
in zero coupon securities. Both funds also may enter into financial futures 
and municipal bond index futures contracts ("futures contracts"), and options 
thereon for hedging purposes. Both funds may not enter into futures contracts 
or purchase options thereon (i) with respect to more than 5% of the value of 
their respective total assets and (ii) if more than one-third of their 
respective net assets would be hedged (this limitation also applies to sales 
of options). Both funds may purchase or sell (write) listed options only on 
debt securities as a means of achieving additional return or of hedging the 
value of the fund's portfolio. Each fund may only buy or write covered 
options that are listed on national securities exchanges. The total amount of 
each fund's written covered options may not exceed 20% of the fund's total 
assets. Each fund has an overall limitation that the cost of all outstanding 
options may not exceed 10% of the fund's total assets. 
    

   Both Tax-Exempt and National Municipal may (i) purchase tax-exempt 
securities on a when-issued or delayed delivery basis and (ii) enter into 
repurchase agreements. 

   The investment policies of both National Municipal and Tax-Exempt are not 
fundamental and may be changed by their respective Boards. The foregoing 
discussion is a summary of the principal differences and similarities between 
the investment policies of the funds. For a more complete discussion of each 
fund's policies see "Investment Objective and Policies" in each fund's 
respective Prospectus and "Investment Practices and Policies" in each fund's 
respective Statement of Additional Information. 

INVESTMENT RESTRICTIONS 

   
   The investment restrictions adopted by National Municipal and Tax-Exempt 
as fundamental policies are substantially similar and are summarized under 
the caption "Investment Restrictions" in their respective Prospectuses and 
Statements of Additional Information. A fundamental investment restriction 
cannot be changed without the vote of a majority of the outstanding voting 
securities of a fund, as defined in the 1940 Act. The material differences 
are as follows: (i) Tax-Exempt has a fundamental restriction that, with 
respect to 100% of its total assets, it may not 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 U.S. Government, its agencies or 
instrumentalities), whereas National Municipal is subject to the same 
fundamental limitation with respect to only 75% of its total assets; (ii) 
Tax-Exempt has a fundamental restriction that it may not purchase more than 
10% of all outstanding taxable debt securities of any one issuer; whereas, 
    

                                      17
<PAGE>

National Municipal is subject to a 10% limitation as to all outstanding 
voting securities of any one issuer, and such limitation applies with respect 
to only 75% of National Municipal's total assets; and (iii) Tax-Exempt has a 
fundamental restriction that it may not invest in common stocks, whereas 
National Municipal does not have any such policy. 

   In addition, Tax-Exempt has a fundamental restriction that it may not 
invest in securities of any issuer if, to the knowledge of such fund, any 
officer, or 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 who own more than 1/2 of 1% own in the aggregate more than 5% of the 
outstanding securities of such issuer; whereas, National Municipal is subject 
to such limitation on a non-fundamental basis. 

               ADDITIONAL INFORMATION ABOUT NATIONAL MUNICIPAL 
                                AND TAX-EXEMPT 

GENERAL 

   For a discussion of the organization and operation of Tax-Exempt and 
National Municipal, see "The Fund and its Management," "Investment Objective 
and Policies," "Investment Restriction" and "Prospectus Summary" in, and the 
cover page of, their respective Prospectuses. 

FINANCIAL INFORMATION 

   For certain financial information about Tax-Exempt and National Municipal, 
see "Financial Highlights" and "Performance Information" in their respective 
Prospectuses. 

MANAGEMENT 

   For information about Tax-Exempt's and National Municipal's Board of 
Trustees, the Investment Manager and the Distributor, see "The Fund and its 
Management" and "Investment Objective and Policies" in, and the back cover 
of, their respective Prospectuses. 

DESCRIPTION OF SECURITIES AND SHAREHOLDER INQUIRIES 

   For a description of the nature and most significant attributes of shares 
of National Municipal and Tax-Exempt, and information regarding shareholder 
inquiries, see "Additional Information" in their respective Prospectuses. 

DIVIDENDS, DISTRIBUTIONS AND TAXES 

   For a discussion of Tax-Exempt's and National Municipal's policies with 
respect to dividends, distributions and taxes, see "Dividends, Distributions 
and Taxes" in their respective Prospectuses as well as the discussion herein 
under "Synopsis -- Purchases, Exchanges and Redemptions." 

PURCHASES, REPURCHASES AND REDEMPTIONS 

   For a discussion of how Tax-Exempt's and National Municipal's shares may 
be purchased, repurchased and redeemed, see "Purchase of Fund Shares," 
"Shareholder Services" and "Redemptions and Repurchases" in their respective 
Prospectuses. 

                                      18
<PAGE>

                  MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE

   For a discussion of Tax-Exempt's performance, see management's letter to 
shareholders in its Annual Report for its fiscal year ended December 31, 1996 
and the succeeding Semi-Annual Report for the six month period ended June 30, 
1997 accompanying this Proxy Statement and Prospectus. For a discussion of 
National Municipal's performance, see its Annual Report for its fiscal year 
ended September 30, 1996, and the succeeding Semi-Annual Report for the six 
month period ended March 31, 1997. 

                       FINANCIAL STATEMENTS AND EXPERTS

   The financial statements of Tax-Exempt and National Municipal as of 
December 31, 1996 and September 30, 1996, respectively, which are 
incorporated by reference in the Statement of Additional Information relating 
to the Registration Statement on Form N-14 of which this Proxy Statement and 
Prospectus forms a part, have been audited by Price Waterhouse LLP, 
independent accountants, for the periods indicated in its respective reports 
thereon. Such financial statements have been incorporated by reference in 
reliance upon such reports given upon the authority of Price Waterhouse LLP 
as experts in accounting and auditing. 

                                 LEGAL MATTERS

   Certain legal matters concerning the issuance of shares of Tax-Exempt will 
be passed upon by Gordon Altman Butowsky Weitzen Shalov & Wein, New York, New 
York. Such firm will rely on Lane Altman & Owens as to matters of 
Massachusetts law. 

                             AVAILABLE INFORMATION

   Additional information about National Municipal and Tax-Exempt is 
available, as applicable, in the following documents which are incorporated 
herein by reference: (i) Tax-Exempt's Prospectus dated July 28, 1997, 
attached to this Proxy Statement and Prospectus, which Prospectus forms a 
part of Post-Effective Amendment No. 20 to Tax-Exempt's Registration 
Statement on Form N-1A (File Nos. 2-66268; 811-2979); (ii) Tax-Exempt's 
Annual Report for its fiscal year ended December 31, 1996 and its Semi-Annual 
Report for the six months ended June 30, 1997, accompanying this Proxy 
Statement and Prospectus; (iii) National Municipal's Prospectus dated 
November 26, 1996, which Prospectus forms a part of Post-Effective Amendment 
No. 3 to National Municipal's Registration Statement on Form N-1A (File Nos. 
33-53015; 811-7163); and (iv) National Municipal's Annual Report for the 
fiscal year ended September 30, 1996 and its Semi-Annual Report for the six 
months ended March 31, 1997. The foregoing documents may be obtained without 
charge by calling (212) 293-2550 or (800) 526-3143. 

   National Municipal and Tax-Exempt are subject to the informational 
requirements of the Securities Exchange Act of 1934, as amended, and in 
accordance therewith, file reports and other information with the Commission. 
Proxy material, reports and other information about National Municipal and 
Tax-Exempt which are of public record can be inspected and copied at public 
reference facilities maintained by the Commission at Room 1204, Judiciary 
Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 and certain of its 
regional offices, and copies of such materials can be obtained at prescribed 
rates from the Public Reference Branch, Office of Consumer Affairs and 
Information Services, Securities and Exchange Commission, Washington, D.C. 
20549. 

                                      19
<PAGE>

                                OTHER BUSINESS

   Management of National Municipal knows of no business other than the 
matters specified above which will be presented at the Meeting. Since matters 
not known at the time of the solicitation may come before the Meeting, the 
proxy as solicited confers discretionary authority with respect to such 
matters as properly come before the Meeting, including any adjournment or 
adjournments thereof, and it is the intention of the persons named as 
attorneys-in-fact in the proxy to vote this proxy in accordance with their 
judgment on such matters. 

   
                                            By Order of the Board of Trustees, 


                                            BARRY FINK, 
                                            Secretary 
                                            August 20, 1997 
    

                                      20
<PAGE>

                                                                     EXHIBIT A 

                     AGREEMENT AND PLAN OF REORGANIZATION 

   THIS AGREEMENT AND PLAN OF REORGANIZATION ("Agreement") is made as of this 
30th day of June, 1997, by and between DEAN WITTER TAX-EXEMPT SECURITIES 
TRUST, a Massachusetts business trust ("Tax-Exempt") and DEAN WITTER NATIONAL 
MUNICIPAL TRUST, a Massachusetts business trust ("National Municipal"). 

   This Agreement is intended to be and is adopted as a "plan of 
reorganization" within the meaning of Treas. Reg. 1.368-2(g), for a 
reorganization under Section 368(a) (1) of the Internal Revenue Code of 1986, 
as amended (the "Code"). The reorganization ("Reorganization") will consist 
of the transfer to Tax-Exempt of substantially all of the assets of National 
Municipal in exchange for the assumption by Tax-Exempt of all stated 
liabilities of National Municipal and the issuance by Tax-Exempt of Class B 
shares ("Tax-Exempt Shares"), to be distributed, after the Closing Date 
hereinafter referred to, to the shareholders of National Municipal in 
liquidation of National Municipal as provided herein, all upon the terms and 
conditions hereinafter set forth in this Agreement. 

   In consideration of the premises and of the covenants and agreements 
hereinafter set forth, the parties hereto covenant and agree as follows: 

1. THE REORGANIZATION AND LIQUIDATION OF NATIONAL MUNICIPAL 

   1.1 Subject to the terms and conditions herein set forth and on the basis 
of the representations and warranties contained herein, National Municipal 
agrees to assign, deliver and otherwise transfer the National Municipal 
Assets (as defined in paragraph 1.2) to Tax-Exempt and Tax-Exempt agrees in 
exchange therefor to assume all of National Municipal's stated liabilities on 
the Closing Date as set forth in paragraph 1.3(a) and to deliver to National 
Municipal the number of Tax-Exempt Shares, including fractional Tax-Exempt 
Shares, determined by dividing the value of the National Municipal Assets, 
net of such stated liabilities, computed as of the Valuation Date (as defined 
in paragraph 2.1) in the manner set forth in paragraph 2.1, by the net asset 
value of a Tax-Exempt Share, computed at the time and date and in the manner 
set forth in paragraph 2.2. Such transactions shall take place at the closing 
provided for in paragraph 3.1 ("Closing"). 

   1.2 (a) The "National Municipal Assets" shall consist of all property, 
including without limitation, all cash (other than the "Cash Reserve" (as 
defined in paragraph 1.3(b)), cash equivalents, securities and dividend and 
interest receivables owned by National Municipal, and any deferred or prepaid 
expenses shown as an asset on National Municipal's books on the Valuation 
Date. 

       (b) On or prior to the Valuation Date, National Municipal will provide 
Tax-Exempt with a list of all of National Municipal's assets to be assigned, 
delivered and otherwise transferred to Tax-Exempt and of the stated 
liabilities to be assumed by Tax-Exempt pursuant to this Agreement. National 
Municipal reserves the right to sell any of the securities on such list but 
will not, without the prior approval of Tax-Exempt, acquire any additional 
securities other than securities of the type in which Tax-Exempt is permitted 
to invest and in amounts agreed to in writing by Tax-Exempt. Tax-Exempt will, 
within a reasonable time prior to the Valuation Date, furnish National 
Municipal with a statement of Tax-Exempt's investment objectives, policies 
and restrictions and a list of the securities, if any, on the list referred 
to in 

                                      A-1
<PAGE>

the first sentence of this paragraph that do not conform to Tax-Exempt's 
investment objective, policies and restrictions. In the event that National 
Municipal holds any investments that Tax-Exempt is not permitted to hold, 
National Municipal will dispose of such securities on or prior to the 
Valuation Date. In addition, if it is determined that the portfolios of 
National Municipal and Tax-Exempt, when aggregated, would contain investments 
exceeding certain percentage limitations imposed upon Tax-Exempt with respect 
to such investments, National Municipal if requested by Tax-Exempt will, on 
or prior to the Valuation Date, dispose of and/or reinvest a sufficient 
amount of such investments as may be necessary to avoid violating such 
limitations as of the Closing Date (as defined in paragraph 3.1). 

   1.3 (a) National Municipal will endeavor to discharge all of its 
liabilities and obligations on or prior to the Valuation Date. Tax-Exempt 
will assume all stated liabilities, which includes, without limitation, all 
expenses, costs, charges and reserves reflected on an unaudited Statement of 
Assets and Liabilities of National Municipal prepared by the Treasurer of 
National Municipal as of the Valuation Date in accordance with generally 
accepted accounting principles consistently applied from the prior audited 
period. 

       (b) On the Valuation Date, National Municipal may establish a cash 
reserve, which shall not exceed 5% of National Municipal's net assets as of 
the close of business on the Valuation Date ("Cash Reserve") to be retained 
by National Municipal and used for the payment of its liabilities not 
discharged prior to the Valuation Date and for the expenses of dissolution. 

   1.4 In order for National Municipal to comply with Section 852(a)(1) of 
the Code and to avoid having any investment company taxable income or net 
capital gain (as defined in Sections 852(b)(2) and 1222(11) of the Code, 
respectively) in the short taxable year ending with its dissolution, National 
Municipal will on or before the Valuation Date (a) declare a dividend in an 
amount large enough so that it will have declared dividends of all of its 
investment company taxable income and net capital gain, if any, for such 
taxable year (determined without regard to any deduction for dividends paid) 
and (b) distribute such dividend. 

   1.5 On the Closing Date or as soon as practicable thereafter, National 
Municipal will distribute Tax-Exempt Shares received by National Municipal 
pursuant to paragraph 1.1 pro rata to its shareholders of record determined 
as of the close of business on the Valuation Date ("National Municipal 
Shareholders"). Such distribution will be accomplished by an instruction, 
signed by National Municipal's Secretary, to transfer Tax-Exempt Shares then 
credited to National Municipal's account on the books of Tax-Exempt to open 
accounts on the books of Tax-Exempt in the names of the National Municipal 
Shareholders and representing the respective pro rata number of Tax-Exempt 
Shares due such National Municipal Shareholders. All issued and outstanding 
shares of National Municipal simultaneously will be canceled on National 
Municipal's books; however, share certificates representing interests in 
National Municipal will represent a number of Tax-Exempt Shares after the 
Closing Date as determined in accordance with paragraph 2.3. Tax-Exempt will 
issue certificates representing Tax-Exempt Shares in connection with such 
exchange only upon the written request of a National Municipal Shareholder. 

   1.6 Ownership of Tax-Exempt Shares will be shown on the books of 
Tax-Exempt's transfer agent. Tax-Exempt Shares will be issued in the manner 
described in Tax-Exempt's current Prospectus and Statement of Additional 
Information. 

   1.7 Any transfer taxes payable upon issuance of Tax-Exempt Shares in a 
name other than the registered holder of Tax-Exempt Shares on National 
Municipal's books as of the close of business on the 

                                      A-2
<PAGE>

Valuation Date shall, as a condition of such issuance and transfer, be paid 
by the person to whom Tax-Exempt Shares are to be issued and transferred. 

   1.8 Any reporting responsibility of National Municipal is and shall remain 
the responsibility of National Municipal up to and including the date on 
which National Municipal is dissolved and deregistered pursuant to paragraph 
1.9. 

   1.9 Within one year after the Closing Date, National Municipal shall pay 
or make provision for the payment of all its liabilities and taxes, and 
distribute to the shareholders of National Municipal as of the close of 
business on the Valuation Date any remaining amount of the Cash Reserve (as 
reduced by the estimated cost of distributing it to shareholders). National 
Municipal shall be dissolved as a Massachusetts business trust and 
deregistered as an investment company under the Investment Company Act of 
1940, as amended ("1940 Act"), promptly following the making of all 
distributions pursuant to paragraph 1.5. 

   1.10 Copies of all books and records maintained on behalf of National 
Municipal in connection with its obligations under the 1940 Act, the Code, 
state blue sky laws or otherwise in connection with this Agreement will 
promptly after the Closing be delivered to officers of Tax-Exempt or their 
designee and Tax-Exempt or its designee shall comply with applicable record 
retention requirements to which National Municipal is subject under the 1940 
Act. 

2. VALUATION 

   2.1 The value of the National Municipal Assets shall be the value of such 
assets computed as of 4:00 p.m. New York City time on the third day that the 
New York Stock Exchange is open for business following the receipt of the 
requisite approval by shareholders of National Municipal of this Agreement or 
at such time on such earlier or later date after such approval as may be 
mutually agreed upon in writing (such time and date being hereinafter called 
the "Valuation Date"), using the valuation procedures set forth in 
Tax-Exempt's then current Prospectus and Statement of Additional Information. 

   2.2 The net asset value of a Tax-Exempt Share shall be the net asset value 
per share computed on the Valuation Date, using the valuation procedures set 
forth in Tax-Exempt's then current Prospectus and Statement of Additional 
Information. 

   2.3 The number of Tax-Exempt Shares (including fractional shares, if any) 
to be issued hereunder shall be determined by dividing the value of the 
National Municipal Assets, net of the liabilities of National Municipal 
assumed by Tax-Exempt pursuant to paragraph 1.1, determined in accordance 
with paragraph 2.1, by the net asset value of a Tax-Exempt Share determined 
in accordance with paragraph 2.2. 

   2.4 All computations of value shall be made by Dean Witter Services 
Company Inc. ("Services") in accordance with its regular practice in pricing 
Tax-Exempt. Tax-Exempt shall cause Services to deliver a copy of its 
valuation report at the Closing. 

3. CLOSING AND CLOSING DATE 

   3.1 The Closing shall take place on the next business day following the 
Valuation Date (the "Closing Date"). The Closing shall be held as of 9:00 
a.m. Eastern time, or at such other time as the parties may agree. The 
Closing shall be held in a location mutually agreeable to the parties hereto. 
All acts taking place at the Closing shall be deemed to take place 
simultaneously as of 9:00 a.m. Eastern time on the Closing Date unless 
otherwise provided. 

                                      A-3
<PAGE>

    3.2 Portfolio securities held by National Municipal and represented by a 
certificate or other written instrument shall be presented by it or on its 
behalf to The Bank of New York (the "Custodian"), as custodian for 
Tax-Exempt, for examination no later than five business days preceding the 
Valuation Date. Such portfolio securities (together with any cash or other 
assets) shall be delivered by National Municipal to the Custodian for the 
account of Tax-Exempt on or before the Closing Date in conformity with 
applicable custody provisions under the 1940 Act and duly endorsed in proper 
form for transfer in such condition as to constitute good delivery thereof in 
accordance with the custom of brokers. The portfolio securities shall be 
accompanied by all necessary federal and state stock transfer stamps or a 
check for the appropriate purchase price of such stamps. Portfolio securities 
and instruments deposited with a securities depository (as defined in Rule 
17f-4 under the 1940 Act) shall be delivered on or before the Closing Date by 
book-entry in accordance with customary practices of such depository and the 
Custodian. The cash delivered shall be in the form of a Federal Funds wire, 
payable to the order of "The Bank of New York, Custodian for Dean Witter 
Tax-Exempt Securities Trust." 

   3.3 In the event that on the Valuation Date, (a) the New York Stock 
Exchange shall be closed to trading or trading thereon shall be restricted or 
(b) trading or the reporting of trading on such Exchange or elsewhere shall 
be disrupted so that, in the judgment of both Tax-Exempt and National 
Municipal, accurate appraisal of the value of the net assets of Tax-Exempt or 
the National Municipal Assets is impracticable, the Valuation Date shall be 
postponed until the first business day after the day when trading shall have 
been fully resumed without restriction or disruption and reporting shall have 
been restored. 

   3.4 If requested, National Municipal shall deliver to Tax-Exempt or its 
designee (a) at the Closing, a list, certified by its Secretary, of the 
names, addresses and taxpayer identification numbers of the National 
Municipal Shareholders and the number and percentage ownership of outstanding 
National Municipal shares owned by each such National Municipal Shareholder, 
all as of the Valuation Date, and (b) as soon as practicable after the 
Closing, all original documentation (including Internal Revenue Service 
forms, certificates, certifications and correspondence) relating to the 
National Municipal Shareholders' taxpayer identification numbers and their 
liability for or exemption from back-up withholding. Tax-Exempt shall issue 
and deliver to such Secretary a confirmation evidencing delivery of 
Tax-Exempt Shares to be credited on the Closing Date to National Municipal or 
provide evidence satisfactory to National Municipal that such Tax-Exempt 
Shares have been credited to National Municipal's account on the books of 
Tax-Exempt. At the Closing, each party shall deliver to the other such bills 
of sale, checks, assignments, share certificates, if any, receipts or other 
documents as such other party or its counsel may reasonably request. 

4. COVENANTS OF TAX-EXEMPT AND NATIONAL MUNICIPAL 

   4.1 Except as otherwise expressly provided herein with respect to National 
Municipal, Tax-Exempt and National Municipal each will operate its business 
in the ordinary course between the date hereof and the Closing Date, it being 
understood that such ordinary course of business will include customary 
dividends and other distributions. 

   4.2 Tax-Exempt will prepare and file with the Securities and Exchange 
Commission ("Commission") a registration statement on Form N-14 under the 
Securities Act of 1933, as amended ("1933 Act"), relating to Tax-Exempt 
Shares ("Registration Statement"). National Municipal will provide Tax-Exempt 
with the Proxy Materials as described in paragraph 4.3 below, for inclusion 
in the Registration Statement. 

                                      A-4
<PAGE>

National Municipal will further provide Tax-Exempt with such other 
information and documents relating to Tax-Exempt as are reasonably necessary 
for the preparation of the Registration Statement. 

   4.3 National Municipal will call a meeting of its shareholders to consider 
and act upon this Agreement and to take all other action necessary to obtain 
approval of the transactions contemplated herein. National Municipal will 
prepare the notice of meeting, form of proxy and proxy statement 
(collectively, "Proxy Materials") to be used in connection with such meeting; 
provided that Tax-Exempt will furnish National Municipal with its currently 
effective prospectus for inclusion in the Proxy Materials and with such other 
information relating to Tax-Exempt as is reasonably necessary for the 
preparation of the Proxy Materials. 

   4.4 National Municipal will assist Tax-Exempt in obtaining such 
information as Tax-Exempt reasonably requests concerning the beneficial 
ownership of National Municipal shares. 

   4.5 Subject to the provisions of this Agreement, Tax-Exempt and National 
Municipal will each take, or cause to be taken, all action, and do or cause 
to be done, all things reasonably necessary, proper or advisable to 
consummate and make effective the transactions contemplated by this 
Agreement. 

   4.6 National Municipal shall furnish or cause to be furnished to 
Tax-Exempt within 30 days after the Closing Date a statement of National 
Municipal's assets and liabilities as of the Closing Date, which statement 
shall be certified by National Municipal's Treasurer and shall be in 
accordance with generally accepted accounting principles consistently 
applied. As promptly as practicable, but in any case within 60 days after the 
Closing Date, National Municipal shall furnish Tax-Exempt, in such form as is 
reasonably satisfactory to Tax-Exempt, a statement certified by National 
Municipal's Treasurer of National Municipal's earnings and profits for 
federal income tax purposes that will be carried over to Tax-Exempt pursuant 
to Section 381 of the Code. 

   4.7 As soon after the Closing Date as is reasonably practicable, National 
Municipal (a) shall prepare and file all federal and other tax returns and 
reports of National Municipal required by law to be filed with respect to all 
periods ending on or before the Closing Date but not theretofore filed and 
(b) shall pay all federal and other taxes shown as due thereon and/or all 
federal and other taxes that were unpaid as of the Closing Date, including 
without limitation, all taxes for which the provision for payment was made as 
of the Closing Date (as represented in paragraph 5.2(k)). 

   4.8 Tax-Exempt agrees to use all reasonable efforts to obtain the 
approvals and authorizations required by the 1933 Act and the 1940 Act and to 
make such filings required by the state Blue Sky and securities laws as it 
may deem appropriate in order to continue its operations after the Closing 
Date. 

5. REPRESENTATIONS AND WARRANTIES 

   5.1 Tax-Exempt represents and warrants to National Municipal as follows: 

       (a) Tax-Exempt is a validly existing Massachusetts business trust with 
full power to carry on its business as presently conducted; 

       (b) Tax-Exempt is a duly registered, open-end, management investment 
company, and its registration with the Commission as an investment company 
under the 1940 Act and the registration of its shares under the 1933 Act are 
in full force and effect; 

                                      A-5
<PAGE>

        (c) All of the issued and outstanding shares of Tax-Exempt have been 
offered and sold in compliance in all material respects with applicable 
registration requirements of the 1933 Act and state securities laws. Shares 
of Tax-Exempt are registered in all jurisdictions in which they are required 
to be registered under state securities laws and other laws, and said 
registrations, including any periodic reports or supplemental filings, are 
complete and current, all fees required to be paid have been paid, and 
Tax-Exempt is not subject to any stop order and is fully qualified to sell 
its shares in each state in which its shares have been registered; 

       (d) The current Prospectus and Statement of Additional Information of 
Tax-Exempt conform in all material respects to the applicable requirements of 
the 1933 Act and the 1940 Act and the regulations thereunder and do not 
include any untrue statement of a material fact or omit to state any material 
fact required to be stated therein or necessary to make the statements 
therein, in light of the circumstances under which they were made, not 
misleading; 

       (e) Tax-Exempt is not in, and the execution, delivery and performance 
of this Agreement will not result in a, material violation of any provision 
of Tax-Exempt's Declaration of Trust or By-Laws or of any agreement, 
indenture, instrument, contract, lease or other undertaking to which 
Tax-Exempt is a party or by which it is bound; 

       (f) No litigation or administrative proceeding or investigation of or 
before any court or governmental body is presently pending or, to its 
knowledge, threatened against Tax-Exempt or any of its properties or assets 
which, if adversely determined, would materially and adversely affect its 
financial condition or the conduct of its business; and Tax-Exempt knows of 
no facts that might form the basis for the institution of such proceedings 
and is not a party to or subject to the provisions of any order, decree or 
judgment of any court or governmental body which materially and adversely 
affects, or is reasonably likely to materially and adversely effect, its 
business or its ability to consummate the transactions herein contemplated; 

       (g) The Statement of Assets and Liabilities, Statement of Operations, 
Statement of Changes in Net Assets and Financial Highlights as of December 
31, 1996, and for the year then ended, of Tax-Exempt certified by Price 
Waterhouse LLP (copies of which have been furnished to National Municipal), 
fairly present, in all materials respects, Tax-Exempt's financial condition 
as of such date in accordance with generally accepted accounting principles, 
and its results of such operations, changes in its net assets and financial 
highlights for such period, and as of such date there were no known 
liabilities of Tax-Exempt (contingent or otherwise) not disclosed therein 
that would be required in accordance with generally accepted accounting 
principles to be disclosed therein; 

       (h) All issued and outstanding Tax-Exempt Shares are, and at the 
Closing Date will be, duly and validly issued and outstanding, fully paid and 
nonassessable with no personal liability attaching to the ownership thereof, 
except as set forth under the caption "Additional Information" in 
Tax-Exempt's current Prospectus incorporated by reference in the Registration 
Statement. Tax-Exempt does not have outstanding any options, warrants or 
other rights to subscribe for or purchase any of its shares; 

       (i) The execution, delivery and performance of this Agreement have 
been duly authorized by all necessary action on the part of Tax-Exempt, and 
this Agreement constitutes a valid and binding obligation of Tax-Exempt 
enforceable in accordance with its terms, subject as to enforcement, to 
bankruptcy, insolvency, reorganization, moratorium and other laws relating to 
or affecting creditors rights and to general equity principles. No other 
consents, authorizations or approvals are necessary in connection with 
Tax-Exempt's performance of this Agreement; 

                                      A-6
<PAGE>

        (j) Tax-Exempt Shares to be issued and delivered to National 
Municipal, for the account of the National Municipal Shareholders, pursuant 
to the terms of this Agreement will at the Closing Date have been duly 
authorized and, when so issued and delivered, will be duly and validly issued 
Tax-Exempt Shares, and will be fully paid and non-assessable with no personal 
liability attaching to the ownership thereof, except as set forth under the 
caption "Additional Information" in Tax-Exempt's current Prospectus 
incorporated by reference in the Registration Statement; 

       (k) All material Federal and other tax returns and reports of 
Tax-Exempt required by law to be filed on or before the Closing Date have 
been filed and are correct, and all Federal and other taxes shown as due or 
required to be shown as due on said returns and reports have been paid or 
provision has been made for the payment thereof, and to the best of 
Tax-Exempt's knowledge, no such return is currently under audit and no 
assessment has been asserted with respect to any such return; 

       (l) For each taxable year since its inception, Tax-Exempt has met the 
requirements of Subchapter M of the Code for qualification and treatment as a 
"regulated investment company" and neither the execution or delivery of nor 
the performance of its obligations under this Agreement will adversely 
affect, and no other events are reasonably likely to occur which will 
adversely affect the ability of Tax-Exempt to continue to meet the 
requirements of Subchapter M of the Code; 

       (m) Since December 31, 1996 there has been no change by Tax-Exempt in 
accounting methods, principles, or practices, including those required by 
generally accepted accounting principles; 

       (n) The information furnished or to be furnished by Tax-Exempt for use 
in registration statements, proxy materials and other documents which may be 
necessary in connection with the transactions contemplated hereby shall be 
accurate and complete in all material respects and shall comply in all 
material respects with Federal securities and other laws and regulations 
applicable thereto; and 

       (o) The Proxy Materials to be included in the Registration Statement 
(only insofar as they relate to Tax-Exempt) will, on the effective date of 
the Registration Statement and on the Closing Date, not contain any untrue 
statement of a material fact or omit to state a material fact required to be 
stated therein or necessary to make the statements therein, in light of the 
circumstances under which such statements were made, not materially 
misleading. 

   5.2 National Municipal represents and warrants to Tax-Exempt as follows: 

       (a) National Municipal is a validly existing Massachusetts business 
trust with full power to carry on its business as presently conducted; 

       (b) National Municipal is a duly registered, open-end, management 
investment company, and its registration with the Commission as an investment 
company under the 1940 Act and the registration of its shares under the 1933 
Act are in full force and effect; 

       (c) All of the issued and outstanding shares of beneficial interest of 
National Municipal have been offered and sold in compliance in all material 
respects with applicable requirements of the 1933 Act and state securities 
laws. Shares of National Municipal are registered in all jurisdictions in 
which they are required to be registered and said registrations, including 
any periodic reports or supplemental filings, are complete and current, all 
fees required to be paid have been paid, and National Municipal is not 
subject to any stop order and is fully qualified to sell its shares in each 
state in which its shares have been registered; 

                                      A-7
<PAGE>

        (d) The current Prospectus and Statement of Additional Information of 
National Municipal conform in all material respects to the applicable 
requirements of the 1933 Act and the 1940 Act and the regulations thereunder 
and do not include any untrue statement of a material fact or omit to state 
any material fact required to be stated therein or necessary to make the 
statements therein, in light of the circumstances under which they were made, 
not misleading; 

       (e) National Municipal is not, and the execution, delivery and 
performance of this Agreement will not result, in a material violation of any 
provision of National Municipal's Declaration of Trust or By-Laws or of any 
agreement, indenture, instrument, contract, lease or other undertaking to 
which National Municipal is a party or by which it is bound; 

       (f) No litigation or administrative proceeding or investigation of or 
before any court or governmental body is presently pending or, to its 
knowledge, threatened against National Municipal or any of its properties or 
assets which, if adversely determined, would materially and adversely affect 
its financial condition or the conduct of its business; and National 
Municipal knows of no facts that might form the basis for the institution of 
such proceedings and is not a party to or subject to the provisions of any 
order, decree or judgment of any court or governmental body which materially 
and adversely affects, or is reasonably likely to materially and adversely 
effect, its business or its ability to consummate the transactions herein 
contemplated; 

       (g) The Statement of Assets and Liabilities, Statement of Operations, 
Statement of Changes in Net Assets and Financial Highlights of National 
Municipal as of September 30, 1996 and for the year then ended, certified by 
Price Waterhouse LLP (copies of which have been or will be furnished to 
Tax-Exempt) fairly present, in all material respects, National Municipal's 
financial condition as of such date, and its results of operations, changes 
in its net assets and financial highlights for such period in accordance with 
generally accepted accounting principles, and as of such date there were no 
known liabilities of National Municipal (contingent or otherwise) not 
disclosed therein that would be required in accordance with generally 
accepted accounting principles to be disclosed therein; 

       (h) National Municipal has no material contracts or other commitments 
(other than this Agreement) that will be terminated with liability to it 
prior to the Closing Date; 

       (i) All issued and outstanding shares of National Municipal are, and 
at the Closing Date will be, duly and validly issued and outstanding, fully 
paid and nonassessable with no personal liability attaching to the ownership 
thereof, except as set forth under the caption "Additional Information" in 
National Municipal's current Prospectus incorporated by reference in the 
Registration Statement. National Municipal does not have outstanding any 
options, warrants or other rights to subscribe for or purchase any of its 
shares, nor is there outstanding any security convertible to any of its 
shares. All such shares will, at the time of Closing, be held by the persons 
and in the amounts set forth in the list of shareholders submitted to 
Tax-Exempt pursuant to paragraph 3.4; 

       (j) The execution, delivery and performance of this Agreement will 
have been duly authorized prior to the Closing Date by all necessary action 
on the part of National Municipal, and subject to the approval of National 
Municipal's shareholders, this Agreement constitutes a valid and binding 
obligation of National Municipal, enforceable in accordance with its terms, 
subject as to enforcement to bankruptcy, insolvency, reorganization, 
moratorium and other laws relating to or affecting creditors rights and to 
general equity principles. No other consents, authorizations or approvals are 
necessary in connection with National Municipal's performance of this 
Agreement; 

                                      A-8
<PAGE>

        (k) All material federal and other tax returns and reports of 
National Municipal required by law to be filed on or before the Closing Date 
shall have been filed and are correct and all Federal and other taxes shown 
as due or required to be shown as due on said returns and reports have been 
paid or provision has been made for the payment thereof, and to the best of 
National Municipal's knowledge, no such return is currently under audit and 
no assessment has been asserted with respect to any such return; 

       (l) For each taxable year since its inception, National Municipal has 
met all the requirements of Subchapter M of the Code for qualification and 
treatment as a "regulated investment company" and neither the execution or 
delivery of nor the performance of its obligations under this Agreement will 
adversely affect, and no other events are reasonably likely to occur which 
will adversely affect the ability of National Municipal to continue to meet 
the requirements of Subchapter M of the Code; 

       (m) At the Closing Date, National Municipal will have good and valid 
title to the National Municipal Assets, subject to no liens (other than the 
obligation, if any, to pay the purchase price of portfolio securities 
purchased by National Municipal which have not settled prior to the Closing 
Date), security interests or other encumbrances, and full right, power and 
authority to assign, deliver and otherwise transfer such assets hereunder, 
and upon delivery and payment for such assets, Tax-Exempt will acquire good 
and marketable title thereto, subject to no restrictions on the full transfer 
thereof, including any restrictions as might arise under the 1933 Act; 

       (n) On the effective date of the Registration Statement, at the time 
of the meeting of National Municipal's shareholders and on the Closing Date, 
the Proxy Materials (exclusive of the currently effective Tax-Exempt's 
Prospectus contained therein) will (i) comply in all material respects with 
the provisions of the 1933 Act, the Securities Exchange Act of 1934, as 
amended ("1934 Act") and the 1940 Act and the regulations thereunder and (ii) 
not contain any untrue statement of a material fact or omit to state a 
material fact required to be stated therein or necessary to make the 
statements therein not misleading. Any other information furnished by 
National Municipal for use in the Registration Statement or in any other 
manner that may be necessary in connection with the transactions contemplated 
hereby shall be accurate and complete and shall comply in all material 
respects with applicable federal securities and other laws and regulations 
thereunder; 

       (o) National Municipal will, on or prior to the Valuation Date, 
declare one or more dividends or other distributions to shareholders that, 
together with all previous dividends and other distributions to shareholders, 
shall have the effect of distributing to the shareholders all of its 
investment company taxable income and net capital gain, if any, through the 
Valuation Date (computed without regard to any deduction for dividends paid); 

       (p) National Municipal has maintained or has caused to be maintained 
on its behalf all books and accounts as required of a registered investment 
company in compliance with the requirements of Section 31 of the 1940 Act and 
the Rules thereunder; and 

       (q) National Municipal is not acquiring Tax-Exempt Shares to be issued 
hereunder for the purpose of making any distribution thereof other than in 
accordance with the terms of this Agreement. 

6. CONDITIONS PRECEDENT TO OBLIGATIONS OF NATIONAL MUNICIPAL 

   The obligations of National Municipal to consummate the transactions 
provided for herein shall be subject, at its election, to the performance by 
Tax-Exempt of all the obligations to be performed by it hereunder on or 
before the Closing Date and, in addition thereto, the following conditions: 

                                      A-9
<PAGE>

    6.1 All representations and warranties of Tax-Exempt contained in this 
Agreement shall be true and correct in all material respects as of the date 
hereof and, except as they may be affected by the transactions contemplated 
by this Agreement, as of the Closing Date with the same force and effect as 
if made on and as of the Closing Date; 

   6.2 Tax-Exempt shall have delivered to National Municipal a certificate of 
its President and Treasurer, in a form reasonably satisfactory to National 
Municipal and dated as of the Closing Date, to the effect that the 
representations and warranties of Tax-Exempt made in this Agreement are true 
and correct at and as of the Closing Date, except as they may be affected by 
the transactions contemplated by this Agreement, and as to such other matters 
as National Municipal shall reasonably request; 

   6.3 National Municipal shall have received a favorable opinion from Gordon 
Altman Butowsky Weitzen Shalov & Wein, counsel to Tax-Exempt, dated as of the 
Closing Date, to the effect that: 

     (a) Tax-Exempt is a validly existing Massachusetts business trust, and 
    has the power to own all of its properties and assets and to carry on its 
    business as presently conducted (Massachusetts counsel may be relied upon 
    in delivering such opinion); (b) Tax-Exempt is a duly registered, 
    open-end, management investment company, and its registration with the 
    Commission as an investment company under the 1940 Act is in full force 
    and effect; (c) this Agreement has been duly authorized, executed and 
    delivered by Tax-Exempt and, assuming that the Registration Statement 
    complies with the 1933 Act, the 1934 Act and the 1940 Act and regulations 
    thereunder and assuming due authorization, execution and delivery of this 
    Agreement by National Municipal, is a valid and binding obligation of 
    Tax-Exempt enforceable against Tax-Exempt in accordance with its terms, 
    subject as to enforcement, to bankruptcy, insolvency, reorganization, 
    moratorium and other laws relating to or affecting creditors rights and to 
    general equity principles; (d) Tax-Exempt Shares to be issued to National 
    Municipal Shareholders as provided by this Agreement are duly authorized 
    and upon such delivery will be validly issued and outstanding and fully 
    paid and non-assessable (except as set forth under the caption "Additional 
    Information" in Tax-Exempt's Prospectus), and no shareholder of Tax-Exempt 
    has any preemptive rights to subscription or purchase in respect thereof 
    (Massachusetts counsel may be relied upon in delivering such opinion); (e) 
    the execution and delivery of this Agreement did not, and the consummation 
    of the transactions contemplated hereby will not, violate Tax-Exempt's 
    Declaration of Trust or By-Laws; and (f) to the knowledge of such counsel, 
    no consent, approval, authorization or order of any court or governmental 
    authority of the United States or any state is required for the 
    consummation by Tax-Exempt of the transactions contemplated herein, except 
    such as have been obtained under the 1933 Act, the 1934 Act and the 1940 
    Act and such as may be required under state securities laws; and 

   6.4 As of the Closing Date, there shall have been no material change in 
the investment objective, policies and restrictions nor any increase in the 
investment management fees or annual fees payable pursuant to Tax-Exempt's 
12b-1 plan of distribution from those described in Tax-Exempt's Prospectus 
and Statement of Additional Information dated July 28, 1997. 

7. CONDITIONS PRECEDENT TO OBLIGATIONS OF TAX-EXEMPT 

   The obligations of Tax-Exempt to complete the transactions provided for 
herein shall be subject, at its election, to the performance by National 
Municipal of all the obligations to be performed by it hereunder on or before 
the Closing Date and, in addition thereto, the following conditions: 

                                     A-10
<PAGE>

    7.1 All representations and warranties of National Municipal contained in 
this Agreement shall be true and correct in all material respects as of the 
date hereof and, except as they may be affected by the transactions 
contemplated by this Agreement, as of the Closing Date with the same force 
and effect as if made on and as of the Closing Date; 

   7.2 National Municipal shall have delivered to Tax-Exempt at the Closing a 
certificate of its President and its Treasurer, in form and substance 
satisfactory to Tax-Exempt and dated as of the Closing Date, to the effect 
that the representations and warranties of National Municipal made in this 
Agreement are true and correct at and as of the Closing Date, except as they 
may be affected by the transactions contemplated by this Agreement, and as to 
such other matters as Tax-Exempt shall reasonably request; 

   7.3 National Municipal shall have delivered to Tax-Exempt a statement of 
the National Municipal Assets and its liabilities, together with a list of 
National Municipal's portfolio securities and other assets showing the 
respective adjusted bases and holding periods thereof for income tax 
purposes, as of the Closing Date, certified by the Treasurer of National 
Municipal; 

   7.4 National Municipal shall have delivered to Tax-Exempt within three 
business days after the Closing a letter from Price Waterhouse LLP dated as 
of the Closing Date stating that (a) such firm has performed a limited review 
of the federal and state income tax returns of National Municipal for each of 
the last three taxable years and, based on such limited review, nothing came 
to their attention that caused them to believe that such returns did not 
properly reflect, in all material respects, the federal and state income tax 
liabilities of National Municipal for the periods covered thereby, (b) for 
the period from September 30, 1997 to and including the Closing Date, such 
firm has performed a limited review (based on unaudited financial data) to 
ascertain the amount of applicable federal, state and local taxes and has 
determined that same either have been paid or reserves have been established 
for payment of such taxes, and, based on such limited review, nothing came to 
their attention that caused them to believe that the taxes paid or reserves 
set aside for payment of such taxes were not adequate in all materials 
respects for the satisfaction of all federal, state and local tax liabilities 
for the period from September 30, 1997 to and including the Closing Date and 
(c) based on such limited reviews, nothing came to their attention that 
caused them to believe that National Municipal would not qualify as a 
regulated investment company for federal income tax purposes for any such 
year or period; 

   7.5 Tax-Exempt shall have received at the Closing a favorable opinion from 
Gordon Altman Butowsky Weitzen Shalov & Wein, counsel to National Municipal, 
dated as of the Closing Date to the effect that: 

     (a) National Municipal is a validly existing Massachusetts business trust 
    and has the power to own all of its properties and assets and to carry on 
    its business as presently conducted (Massachusetts counsel may be relied 
    upon in delivering such opinion); (b) National Municipal is a duly 
    registered, open-end, management investment company under the 1940 Act, 
    and its registration with the Commission as an investment company under 
    the 1940 Act is in full force and effect; (c) this Agreement has been duly 
    authorized, executed and delivered by National Municipal and, assuming 
    that the Registration Statement complies with the 1933 Act, the 1934 Act 
    and the 1940 Act and the regulations thereunder and assuming due 
    authorization, execution and delivery of this Agreement by Tax-Exempt, is 
    a valid and binding obligation of National Municipal enforceable against 
    National Municipal in accordance with its terms, subject as to 
    enforcement, to bankruptcy, insolvency, reorganization, moratorium and 
    other laws relating to or affecting creditors rights and to general 

                                     A-11
<PAGE>

    equity principles; (d) the execution and delivery of this Agreement did 
    not, and the consummation of the transactions contemplated hereby will 
    not, violate National Municipal's Declaration of Trust or By-Laws; and (e) 
    to the knowledge of such counsel, no consent, approval, authorization or 
    order of any court or governmental authority of the United States or any 
    state is required for the consummation by National Municipal of the 
    transactions contemplated herein, except such as have been obtained under 
    the 1933 Act, the 1934 Act and the 1940 Act and such as may be required 
    under state securities laws; and 

   7.6 On the Closing Date, the National Municipal Assets shall include no 
assets that Tax-Exempt, by reason of limitations of the fund's Declaration of 
Trust or otherwise, may not properly acquire. 

8. FURTHER CONDITIONS PRECEDENT TO OBLIGATIONS OF TAX-EXEMPT AND 
   NATIONAL MUNICIPAL 

   The obligations of National Municipal and Tax-Exempt hereunder are each 
subject to the further conditions that on or before the Closing Date: 

   8.1 This Agreement and the transactions contemplated herein shall have 
been approved by the requisite vote of the holders of the outstanding shares 
of National Municipal in accordance with the provisions of National 
Municipal's Declaration of Trust, and certified copies of the resolutions 
evidencing such approval shall have been delivered to Tax-Exempt; 

   8.2 On the Closing Date, no action, suit or other proceeding shall be 
pending before any court or governmental agency in which it is sought to 
restrain or prohibit, or obtain damages or other relief in connection with, 
this Agreement or the transactions contemplated herein; 

   8.3 All consents of other parties and all other consents, orders and 
permits of federal, state and local regulatory authorities (including those 
of the Commission and of state Blue Sky and securities authorities, including 
"no-action" positions of and exemptive orders from such federal and state 
authorities) deemed necessary by Tax-Exempt or National Municipal to permit 
consummation, in all material respects, of the transactions contemplated 
herein shall have been obtained, except where failure to obtain any such 
consent, order or permit would not involve risk of a material adverse effect 
on the assets or properties of Tax-Exempt or National Municipal; 

   8.4 The Registration Statement shall have become effective under the 1933 
Act, no stop orders suspending the effectiveness thereof shall have been 
issued and, to the best knowledge of the parties hereto, no investigation or 
proceeding for that purpose shall have been instituted or be pending, 
threatened or contemplated under the 1933 Act; 

   8.5 National Municipal shall have declared and paid a dividend or 
dividends and/or other distribution or distributions that, together with all 
previous such dividends or distributions, shall have the effect of 
distributing to the National Municipal Shareholders all of National 
Municipal's investment company taxable income (computed without regard to any 
deduction for dividends paid) and all of its net capital gain (after 
reduction for any capital loss carry-forward and computed without regard to 
any deduction for dividends paid) for all taxable years ending on or before 
the Closing Date; and 

   8.6 The parties shall have received a favorable opinion of the law firm of 
Gordon Altman Butowsky Weitzen Shalov & Wein (based on such representations 
as such law firm shall reasonably request), addressed to Tax-Exempt and 
National Municipal, which opinion may be relied upon by the shareholders of 
National Municipal, substantially to the effect that, for federal income tax 
purposes: 

                                     A-12
<PAGE>

     (a) The transfer of substantially all of National Municipal's assets in 
    exchange for Tax-Exempt Shares and the assumption by Tax-Exempt of certain 
    stated liabilities of National Municipal followed by the distribution by 
    National Municipal of Tax-Exempt Shares to the National Municipal 
    Shareholders in exchange for their National Municipal shares will 
    constitute a "reorganization" within the meaning of Section 368(a)(1) of 
    the Code, and National Municipal and Tax-Exempt will each be a "party to a 
    reorganization" within the meaning of Section 368(b) of the Code; 

     (b) No gain or loss will be recognized by Tax-Exempt upon the receipt of 
    the assets of National Municipal solely in exchange for Tax-Exempt Shares 
    and the assumption by Tax-Exempt of the stated liabilities of National 
    Municipal; 

     (c) No gain or loss will be recognized by National Municipal upon the 
    transfer of the assets of National Municipal to Tax-Exempt in exchange for 
    Tax-Exempt Shares and the assumption by Tax-Exempt of the stated 
    liabilities or upon the distribution of Tax-Exempt Shares to the National 
    Municipal Shareholders in exchange for their National Municipal shares; 

     (d) No gain or loss will be recognized by the National Municipal 
    Shareholders upon the exchange of the National Municipal shares for 
    Tax-Exempt Shares; 

     (e) The aggregate tax basis for Tax-Exempt Shares received by each 
    National Municipal Shareholder pursuant to the reorganization will be the 
    same as the aggregate tax basis of the National Municipal Shares held by 
    each such National Municipal Shareholder immediately prior to the 
    Reorganization; 

     (f) The holding period of Tax-Exempt Shares to be received by each 
    National Municipal Shareholder will include the period during which the 
    National Municipal Shares surrendered in exchange therefor were held 
    (provided such National Municipal Shares were held as capital assets on 
    the date of the Reorganization); 

     (g) The tax basis of the assets of National Municipal acquired by 
    Tax-Exempt will be the same as the tax basis of such assets to National 
    Municipal immediately prior to the Reorganization; and 

     (h) The holding period of the assets of National Municipal in the hands 
    of Tax-Exempt will include the period during which those assets were held 
    by National Municipal. 

Notwithstanding anything herein to the contrary, neither Tax-Exempt nor 
National Municipal may waive the conditions set forth in this paragraph 8.6. 

9. FEES AND EXPENSES 

   9.1 (a) Dean Witter InterCapital Inc. ("InterCapital"), the investment 
manager to both National Municipal and Tax-Exempt, shall bear all expenses 
incurred in connection with the carrying out of the provisions of this 
Agreement, including legal, accounting, Commission registration fees and Blue 
Sky expenses, printing, filing and proxy solicitation expenses and portfolio 
transfer taxes (if any) incurred in connection with the consummation of the 
transactions contemplated herein. 

       (b) In the event the transactions contemplated herein are not 
consummated by reason of Tax-Exempt's or National Municipal's being either 
unwilling or unable to go forward, the funds' only respective obligations 
hereunder shall be to reimburse InterCapital for all reasonable out-of-pocket 
fees and expenses incurred by InterCapital in connection with those 
transactions. 

                                     A-13
<PAGE>

10. ENTIRE AGREEMENT; SURVIVAL OF WARRANTIES 

   10.1 This Agreement constitutes the entire agreement between the parties. 

   10.2 The representations, warranties and covenants contained in this 
Agreement or in any document delivered pursuant hereto or in connection 
herewith shall survive the consummation of the transactions contemplated 
herein, except that the representations, warranties and covenants of National 
Municipal hereunder shall not survive the dissolution and complete 
liquidation of National Municipal in accordance with Section 1.9. 

11. TERMINATION 

   11.1 This Agreement may be terminated and the transactions contemplated 
hereby may be abandoned at any time prior to the Closing: 

     (a) by the mutual written consent of National Municipal and Tax-Exempt; 

     (b) by either Tax-Exempt or National Municipal by notice to the other, 
    without liability to the terminating party on account of such termination 
    (providing the termination party is not otherwise in material default or 
    breach of this Agreement) if the Closing shall not have occurred on or 
    before January 31, 1998; or 

     (c) by either Tax-Exempt or National Municipal, in writing without 
    liability to the terminating party on account of such termination 
    (provided the terminating party is not otherwise in material default or 
    breach of this Agreement), if (i) the other party shall fail to perform in 
    any material respect its agreements contained herein required to be 
    performed on or prior to the Closing Date, (ii) the other party materially 
    breaches any of its representations, warranties or covenants contained 
    herein, (iii) the National Municipal shareholders fail to approve this 
    Agreement at any meeting called for such purpose at which a quorum was 
    present or (iv) any other condition herein expressed to be precedent to 
    the obligations of the terminating party has not been met and it 
    reasonably appears that it will not or cannot be met. 

   11.2 (a) Termination of this Agreement pursuant to paragraphs 11.1 (a) or 
(b) shall terminate all obligations of the parties hereunder and there shall 
be no liability for damages on the part of Tax-Exempt or National Municipal 
or the trustees or officers of Tax-Exempt or National Municipal, to any other 
party or its trustees or officers. 

        (b) Termination of this Agreement pursuant to paragraph 11.1 (c) 
shall terminate all obligations of the parties hereunder and there shall be 
no liability for damages on the part of Tax-Exempt or National Municipal or 
the trustees or officers of Tax-Exempt or National Municipal, except that any 
party in breach of this Agreement shall, upon demand, reimburse InterCapital 
for all reasonable out-of-pocket fees and expenses incurred in connection 
with the transactions contemplated by this Agreement, including legal, 
accounting and filing fees. 

12. AMENDMENTS 

   This Agreement may be amended, modified or supplemented in such manner as 
may be mutually agreed upon in writing by the parties; provided, however, 
that following the meeting of National Municipal's shareholders called by 
National Municipal pursuant to paragraph 4.3, no such amendment 

                                     A-14
<PAGE>

may have the effect of changing the provisions for determining the number of 
Tax-Exempt Shares to be issued to the National Municipal Shareholders under 
this Agreement to the detriment of such National Municipal Shareholders 
without their further approval. 

13. MISCELLANEOUS 

   13.1 The article and paragraph headings contained in this Agreement are 
for reference purposes only and shall not affect in any way the meaning or 
interpretation of this Agreement. 

   13.2 This Agreement may be executed in any number of counterparts, each of 
which shall be deemed an original. 

   13.3 This Agreement shall be governed by and construed in accordance with 
the laws of the Commonwealth of Massachusetts. 

   13.4 This Agreement shall bind and inure to the benefit of the parties 
hereto and their respective successors and assigns, but no assignment or 
transfer hereof or of any rights or obligations hereunder shall be made by 
any party without the written consent of the other party. Nothing herein 
expressed or implied is intended or shall be construed to confer upon or give 
any person, firm or corporation, other than the parties hereto and their 
respective successors and assigns, any rights or remedies under or by reason 
of this Agreement. 

   13.5 The obligations and liabilities of Tax-Exempt hereunder are solely 
those of Tax-Exempt. It is expressly agreed that no shareholder, nominee, 
trustee, officer, agent, or employee of Tax-Exempt shall be personally liable 
hereunder. The execution and delivery of this Agreement have been authorized 
by the directors of Tax-Exempt and signed by authorized officers of 
Tax-Exempt acting as such, and neither such authorization by such trustees 
nor such execution and delivery by such officers shall be deemed to have been 
made by any of them individually or to impose any liability on any of them 
personally. 

   13.6 The obligations and liabilities of National Municipal hereunder are 
solely those of National Municipal. lt is expressly agreed that no 
shareholder, nominee, trustee, officer, agent, or employee of National 
Municipal shall be personally liable hereunder. The execution and delivery of 
this Agreement have been authorized by the trustees of National Municipal and 
signed by authorized officers of National Municipal acting as such, and 
neither such authorization by such trustees nor such execution and delivery 
by such officers shall be deemed to have been made by any of them 
individually or to impose any liability on any of them personally. 

                                     A-15
<PAGE>

    IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement 
to be executed by a duly authorized officer. 


                                      DEAN WITTER NATIONAL MUNICIPAL TRUST 

                                      BY: /s/ Charles A. Fiumefreddo 
                                          ................................... 
                                          NAME: CHARLES A. FIUMEFREDDO 
                                          TITLE: PRESIDENT 

                                      DEAN WITTER TAX-EXEMPT SECURITIES TRUST 

                                      By: /s/ Barry Fink 
                                          ................................... 
                                          NAME: BARRY FINK 
                                          TITLE: VICE PRESIDENT 

                                     A-16
<PAGE>

   
                                                                     EXHIBIT B
    

   PROSPECTUS 
   JULY 28, 1997 

   Dean Witter Tax-Exempt Securities Trust (the "Fund") is an open-end,
diversified management investment company, whose investment objective is to
provide a high level of current income exempt from federal income tax,
consistent with the preservation of capital. The Fund invests principally in
tax-exempt fixed-income securities which are rated in the three highest
categories by Moody's Investors Service, Inc. or Standard & Poor's
Corporation. (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. Shares of the Fund held prior to 
July 28, 1997 have been designated Class D shares. (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 July 28, 1997, 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.

   Dean Witter 
   Tax-Exempt Securities Trust 
   Two World Trade Center 
   New York, New York 10048 
   (212) 392-2550 or 
   (800) 869-NEWS (toll-free) 

             TABLE OF CONTENTS 

Prospectus Summary/  2 
Summary of Fund Expenses/  4 
Financial Highlights/  6 
The Fund and its Management/  7 
Investment Objective and Policies/  7 
 Risk Considerations and Investment Practices/  10 
Investment Restrictions/  12 
Purchase of Fund Shares/  13 
Shareholder Services/  23 
Redemptions and Repurchases/  26 
Dividends, Distributions and Taxes/  27 
Performance Information/  28 
Additional Information/  29 

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. 

             DEAN WITTER DISTRIBUTORS INC. 
             DISTRIBUTOR 

<PAGE>

PROSPECTUS SUMMARY 
- -------------------------------------------------------------------------------
THE                The Fund is organized as a Trust, commonly known as a 
FUND               Massachusetts business trust, and is an open-end,
                   diversified management investment company investing
                   principally in investment grade, tax-exempt fixed-income
                   securities (see page 7).
- -------------------------------------------------------------------------------
SHARES             Shares of beneficial interest with $0.01 par value (see 
OFFERED            page 29). The Fund offers four Classes of shares, each with
                   a different combination of sales charges, ongoing fees and
                   other features (see pages 13-22).
- -------------------------------------------------------------------------------
MINIMUM            The minimum initial investment for each Class is $1,000 
PURCHASE           ($100 if the account is opened through EasyInvest (Service
                   Mark) ). Class D shares are only available to persons
                   investing $5 million or more and to certain other limited
                   categories of investors. For the purpose of meeting the
                   minimum $5 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 Dean Witter
                   InterCapital Inc. serves as investment manager ("Dean
                   Witter Funds") that are sold with a front-end sales charge,
                   and concurrent investments in Class D shares of the Fund
                   and other Dean Witter Funds that are multiple class funds,
                   will be aggregated. The minimum subsequent investment is
                   $100 (see page 13).
- -------------------------------------------------------------------------------
INVESTMENT         The investment objective of the Fund is to provide a high 
OBJECTIVE          level of current income exempt from federal income tax,
                   consistent with the preservation of capital (see page 7).
- -------------------------------------------------------------------------------
INVESTMENT         Dean Witter InterCapital Inc. ("InterCapital"), the 
MANAGER            Investment Manager of the Fund, and its wholly-owned
                   subsidiary, 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 $96.6 billion
                   at June 30, 1997 (see page 7).
- -------------------------------------------------------------------------------
MANAGEMENT FEE     The monthly fee is at an annual rate of 1/2 of 1% of
                   average daily net assets, scaled down on assets over $500
                   million (see page 7).
- -------------------------------------------------------------------------------
DISTRIBUTOR AND    Dean Witter Distributors Inc. (the "Distributor"). The Fund  
DISTRIBUTION       has adopted a distribution plan pursuant to Rule 12b-1
FEE                under the Investment Company Act (the "12b-1 Plan") with
                   respect to the distribution fees paid by the Class A, Class
                   B and Class C shares of the Fund to the Distributor. 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
                   0.15% 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
                   13 and 21).
- -------------------------------------------------------------------------------
ALTERNATIVE         Four classes of shares are offered: 
PURCHASE            
ARRANGEMENTS       o 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 13, 16 and 21).

                                       2
<PAGE>

- -------------------------------------------------------------------------------
                   o 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. Class B
                   shares are also subject to a 12b-1 fee assessed at the
                   annual rate of 0.60% of the average daily net assets of
                   Class B. Class B shares convert to Class A shares
                   approximately ten years after the date of the original
                   purchase (see pages 13, 18 and 21).

                   o 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 0.70% of average daily net assets of the Class (see
                   pages 13, 20 and 21).

                   o Class D shares are offered only to investors meeting an
                   initial investment minimum of $5 million 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 13, 20 and 21). All
                   shares of the Fund held prior to July 28, 1997 have been
                   designated Class D shares. Additional investments in Class
                   D shares by shareholders holding such shares may only be
                   made if those shareholders are otherwise eligible to
                   purchase Class D shares. However, shareholders holding such
                   shares will receive the benefit of the value of such shares
                   towards reduced sales charges on purchases of Class A
                   shares pursuant to the Fund's "Right of Accumulation" (see
                   page 17).
- -------------------------------------------------------------------------------
DIVIDENDS AND      Dividends from net investment income are declared daily and  
CAPITAL GAINS      paid monthly; capital gains, if any, may be distributed   
DISTRIBUTIONS      annually or retained for reinvestment by the Fund.
                   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 23 and 27).
- -------------------------------------------------------------------------------
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 (Service Mark), if
                   after twelve months the shareholder has invested less than
                   $1,000 in the account (see page 26).

- -------------------------------------------------------------------------------
RISKS              The value of the Fund's portfolio securities, and therefore
                   the Fund's net asset value per share, may increase or
                   decrease due to various factors, principally changes in
                   prevailing interest rates and the ability of the issuers of
                   the Fund's portfolio securities to pay interest and
                   principal on such obligations. The Fund may purchase
                   when-issued and delayed delivery securities (see page 10).
                   The Fund may also invest in futures and options, which may
                   be considered speculative in nature and which may involve
                   greater risks than those customarily assumed by certain
                   other investment companies which do not invest in such
                   instruments (see pages 10-12).

- -------------------------------------------------------------------------------

 The above is qualified in its entirety by the detailed information appearing
  elsewhere in the Prospectus and in the Statement of Additional Information.

<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 December 31, 1996. 

<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 ....................................     0.43%        0.43%        0.43%       0.43% 
12b-1 Fees (5)(6)...................................     0.25%        0.60%        0.70%       None 
Other Expenses .....................................     0.05%        0.05%        0.05%       0.05% 
Total Fund Operating Expenses (7)...................     0.73%        1.08%        1.18%       0.48% 
</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)    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 0.15% 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"). 
(6)    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 0.70% distribution fee (see 
       "Purchase of Fund Shares--Alternative Purchase Arrangements"). 
(7)    There were no outstanding shares of Class A, Class B or Class C prior 
       to the date of this Prospectus. Accordingly, "Total Fund Operating 
       Expenses," as shown above with respect to those Classes, are based upon 
       the sum of 12b-1 Fees, Management Fees and estimated "Other Expenses." 

                                       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 ......................................................   $50       $65       $81       $129 
  Class B ......................................................   $61       $64       $80       $132 
  Class C.......................................................   $22       $37       $65       $143 
  Class D ......................................................   $ 5       $15       $27       $ 60 

You would pay the following expenses on the same $1,000 
investment assuming no redemption at the end of the period: 
  Class A ......................................................   $50       $65       $81       $129 
  Class B ......................................................   $11       $34       $60       $132 
  Class C ......................................................   $12       $37       $65       $143 
  Class D ......................................................   $ 5       $15       $27       $ 60 
</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 Price Waterhouse LLP, 
independent accountants. The financial highlights should be read in 
conjunction with the financial statements, the 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. 
All shares of the Fund held prior to July 28, 1997 have been designated Class 
D shares. 

<TABLE>
<CAPTION>
                                  FOR THE YEAR ENDED DECEMBER 31, 
                           --------------------------------------------- 
                             1996     1995     1994      1993     1992 
- ------------------------------------------------------------------------ 
<S>                          <C>      <C>      <C>       <C>      <C>
PER SHARE OPERATING 
 PERFORMANCE: 
Net asset value, 
 beginning of period ......  $12.09   $11.01   $12.41    $11.88   $11.65 
                             ------   ------   ------    ------   ------ 
Net investment income  ....    0.65     0.67     0.70      0.77     0.79 
Net realized and 
 unrealized gain (loss)  ..   (0.24)    1.19    (1.37)     0.54     0.23 
                             ------   ------   ------    ------   ------ 
Total from investment 
  operations ..............    0.41     1.86    (0.67)     1.31     1.02 
                             ------   ------   ------    ------   ------ 
Less dividends and 
 distributions from: 
 Net investment income  ...   (0.65)   (0.67)   (0.70)    (0.77)   (0.79) 
 Net realized gain ........   (0.08)   (0.11)   (0.03)    (0.01)    -- 
                             ------   ------   ------    ------   ------ 
Total dividends and 
  distributions ...........   (0.73)   (0.78)   (0.73)    (0.78)   (0.79) 
                             ------   ------   ------    ------   ------ 
Net asset value, 
 end of period ............  $11.77   $12.09   $11.01    $12.41   $11.88 
                             ======   ======   ======    ======   ======
TOTAL INVESTMENT RETURN+       3.61%   17.37%   (5.55)%   11.23%    9.09% 
RATIOS TO AVERAGE NET 
 ASSETS: 
Expenses ..................    0.48%    0.48%    0.47%     0.47%    0.49% 
Net investment income .....    5.52%    5.76%    6.02%     6.23%    6.74% 
SUPPLEMENTAL DATA: 
Net assets, end of period, 
  in millions .............  $1,190   $1,325   $1,295    $1,582   $1,323 
Portfolio turnover rate  ..      18%      21%      16%       13%       4% 
</TABLE>

                    (RESTUBBED TABLE CONTINUED FROM ABOVE) 

<TABLE>
<CAPTION>
                             1991     1990     1989     1988     1987 
- ------------------------------------------------------------------------ 
<S>                          <C>      <C>      <C>      <C>      <C>
PER SHARE OPERATING 
 PERFORMANCE: 
Net asset value, 
 beginning of period ......  $11.09   $11.28   $10.96   $10.45   $11.50 
                             ------   ------   ------   ------   ------ 
Net investment income  ....    0.80     0.80     0.81     0.81     0.80 
Net realized and 
 unrealized gain (loss)  ..    0.56    (0.18)    0.32     0.51    (0.97) 
                             ------   ------   ------   ------   ------ 
Total from investment 
  operations ..............    1.36     0.62     1.13     1.32    (0.17) 
                             ------   ------   ------   ------   ------ 
Less dividends and 
 distributions from: 
 Net investment income  ...   (0.80)   (0.81)   (0.81)   (0.81)   (0.83) 
 Net realized gain ........    --       --       --       --      (0.05) 
                             ------   ------   ------   ------   ------ 
Total dividends and 
  distributions ...........   (0.80)   (0.81)   (0.81)   (0.81)   (0.88) 
                             ------   ------   ------   ------   ------ 
Net asset value, 
 end of period ............  $11.65   $11.09   $11.28   $10.96   $10.45 
                             ======   ======   ======   ======   ======
TOTAL INVESTMENT RETURN+      12.71%    5.86%   10.61%   13.02%   (1.44)% 
<PAGE>
RATIOS TO AVERAGE NET 
 ASSETS: 
Expenses ..................    0.51%    0.51%    0.51%    0.54%    0.52% 
Net investment income .....    7.05%    7.25%    7.31%    7.51%    7.42% 
SUPPLEMENTAL DATA: 
Net assets, end of period, 
  in millions .............  $1,145   $1,010   $1,033    $908      $896 
Portfolio turnover rate  ..      10%      19%      13%      17%      37% 
</TABLE>

- ------------ 
+ Does not reflect the deduction of sales load. Calculated based on the net 
  asset value as of the last business day of the period. 

                                       6
<PAGE>

THE FUND AND ITS MANAGEMENT 
- ----------------------------------------------------------------------------- 

   Dean Witter Tax-Exempt Securities Trust (the "Fund") is an open-end, 
diversified management investment company incorporated in Maryland on 
December 13, 1979. The Fund reorganized as a trust of the type commonly known 
as a "Massachusetts business trust" on April 30, 1987. 

   Dean Witter InterCapital Inc. ("InterCapital" 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, which was 
incorporated in July, 1992, is a wholly-owned subsidiary of Morgan Stanley, 
Dean Witter, Discover & 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. 

   InterCapital and its wholly-owned subsidiary, Dean Witter Services Company 
Inc., serve in various investment management, advisory, management and 
administrative capacities to a total of 100 investment companies, thirty of 
which are listed on the New York Stock Exchange, with combined total net 
assets of approximately $93.1 billion as of June 30, 1997. The Investment 
Manager also manages portfolios of pension plans, other institutions and 
individuals which aggregated approximately $3.5 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. InterCapital has retained Dean Witter Services Company 
Inc. to perform the aforementioned administrative services for 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 at an annual 
rate of 0.50% of the daily net assets of the Fund up to $500 million, scaled 
down at various asset levels to 0.325% on net assets over $1.25 billion. For 
the fiscal year ended December 31, 1996, the Fund accrued total compensation 
to the Investment Manager amounting to 0.43% of the Fund's average daily net 
assets and the Fund's total expenses amounted to 0.48% of the Fund's average 
daily net assets. 

INVESTMENT OBJECTIVE AND POLICIES 
- ----------------------------------------------------------------------------- 

   The investment objective of the Fund is to provide a high level of current 
income which is exempt from federal income tax, consistent with the 
preservation of capital. There is no assurance that this objective will be 
achieved. This objective is fundamental and may not be changed without 
shareholder approval. The Fund seeks to achieve its investment objective by 
investing its assets in accordance with the following policies: 

   1. At least 80% of the Fund's total assets will be invested in tax-exempt 
securities, except as stated in paragraph (5) below. Tax-exempt securities 
consist of Municipal Bonds and Municipal Notes ("Municipal Obligations") and 
Municipal Commercial Paper. 

   2. At least 75% of the Fund's total assets will be invested in: (a) 
Municipal Bonds which are rated at the time of purchase within the three 
highest grades by Moody's Investors Service, Inc. ("Moody's") or Standard & 
Poor's Corporation ("S&P"); (b) Municipal Notes which at the time of 

                                       7
<PAGE>

purchase are rated in the two highest grades by Moody's or S&P, or, if not 
rated, have outstanding one or more issues of Municipal Bonds rated as set 
forth in clause (a) of this paragraph; and (c) Municipal Commercial Paper 
which at the time of purchase are rated P-1 by Moody's or A-1 by S&P. 

   3. Up to 25% of the Fund's total assets may be invested in tax-exempt 
securities which are not rated by Moody's or S&P or, if rated, are not within 
the rating categories of Moody's or S&P stated in paragraph (2) above. 

   4. In accordance with the current position of the staff of the Securities 
and Exchange Commission, tax-exempt securities which are subject to the 
federal alternative minimum tax for individual shareholders will not be 
included in the 80% total described in paragraph 1 above. (See "Dividends, 
Distributions and Taxes," below.) As such, the remaining 20% of the Fund's 
total assets may be invested in tax-exempt securities subject to the 
alternative minimum tax. 

   5. Inclusive of paragraph 4 above, up to 20% of the Fund's total assets 
may be invested in taxable money market instruments under any one or more of 
the following circumstances: (a) pending investment of proceeds of sale of 
Fund shares or of portfolio securities; (b) pending settlement of purchases 
of portfolio securities; and (c) to maintain liquidity for the purpose of 
meeting anticipated redemptions. In addition, the Fund may temporarily invest 
more than 20% of its total assets in taxable securities, or in tax-exempt 
securities subject to the federal alternative minimum tax for individual 
shareholders, to maintain a "defensive" posture when, in the opinion of the 
Investment Manager, it is advisable to do so because of market conditions. 
The types of taxable securities in which the Fund may temporarily invest are 
limited to the following short-term fixed-income securities (maturing in one 
year or less from the time of purchase): (i) obligations of the United States 
Government, its agencies, instrumentalities or authorities; (ii) commercial 
paper rated P-1 by Moody's or A-1 by S&P; (iii) certificates of deposit of 
domestic banks with assets of $1 billion or more; and (iv) repurchase 
agreements with respect to any of the foregoing portfolio securities. 

   Municipal Obligations are debt obligations of states, cities, 
municipalities and municipal agencies which generally have maturities, at the 
time of their issuance, of either one year or more (Bonds) or from six months 
to three years (Notes). Municipal Commercial Paper refers to short-term 
obligations of municipalities. Any Municipal Obligation which depends 
directly or indirectly on the credit of the Federal Government shall be 
considered to have a rating of Aaa/AAA. The Fund may purchase Municipal 
Obligations which had originally been issued by the same issuer as two 
separate series of the same issue with different interest rates, but which 
are now linked together to form one series. 

   While the Fund may invest up to 25% of its total assets in Municipal 
Obligations which are unrated or, if rated, are not within the three highest 
Bond rating categories of Moody's or S&P or the two highest Note rating 
categories of Moody's or S&P, the Fund does not intend to invest in Municipal 
Bonds which are rated below either Baa by Moody's or BBB by S&P (the lowest 
ratings considered investment grade) or, if not rated, are deemed by the 
Investment Manager to be below investment grade, in amounts exceeding 5% of 
its total assets. Investments in Municipal Bonds rated either Baa by Moody's 
or BBB by S&P may have speculative characteristics and, therefore, changes in 
economic conditions or other circumstances are more likely to weaken their 
capacity to make principal and interest payments than would be the case with 
investments in securities with higher credit ratings. Municipal Bonds rated 
below investment grade may not currently be paying any interest and may have 
extremely poor prospects of ever attaining any real investment standing. 

   The two principal classifications of Municipal Obligations and Commercial 
Paper are "general obligation" and "revenue" obligations or commercial paper. 
General obligation bonds, notes or commercial paper are secured by the 
issuer's pledge of its faith, credit and taxing power for the payment of 
principal and interest. Issuers of general obligation bonds, notes or 
commercial paper include a state, its counties, cities, towns and other 
government 

                                       8
<PAGE>

units. Revenue bonds, notes or commercial paper are payable from the revenues 
derived from a particular facility or class of facilities or, in some cases, 
from specific revenue sources. Revenue bonds, notes or commercial paper are 
issued for a wide variety of purposes, including the financing of electric, 
gas, water and sewer systems and other public utilities; industrial 
development and pollution control facilities; single and multi-family housing 
units; public buildings and facilities; air and marine ports; transportation 
facilities such as toll roads, bridges and tunnels; and health and 
educational facilities such as hospitals and dormitories. They rely primarily 
on user fees to pay debt service, although the principal revenue source is 
often supplemented by additional security features which are intended to 
enhance the creditworthiness of the issuer's obligations. In some cases, 
particularly revenue bonds issued to finance housing and public buildings, a 
direct or implied "moral obligation" of a governmental unit may be pledged to 
the payment of debt service. In other cases, a special tax or other charge 
may augment user fees. 

   Included within the revenue category are participations in lease 
obligations or installment purchase contracts (hereinafter collectively 
called "lease obligations") of municipalities. State and local governments 
issue lease obligations to acquire equipment and facilities. 

   Lease obligations may have risks not normally associated with general 
obligation or other revenue bonds. Leases and installment purchase or 
conditional sale contracts (which may provide for title to the leased asset 
to pass eventually to the issuer) have developed as a means for governmental 
issuers to acquire property and equipment without the necessity of complying 
with the constitutional and statutory requirements generally applicable for 
the issuance of debt. Certain lease obligations contain "non-appropriation" 
clauses that provide that the governmental issuer has no obligation to make 
future payments under the lease or contract unless money is appropriated for 
such purpose by the appropriate legislative body on an annual or other 
periodic basis. Consequently, continued lease payments on those lease 
obligations containing "non-appropriation" clauses are dependent on future 
legislative actions. If such legislative actions do not occur, the holders of 
the lease obligation may experience difficulty in exercising their rights, 
including disposition of the property. 

   Lease obligations represent a type of financing that may not have the 
depth of marketability associated with more conventional municipal 
obligations, and, as a result, certain of such lease obligations may be 
considered illiquid securities. To determine whether or not the Fund will 
consider such securities to be illiquid (the Fund may not invest more than 
ten percent of its net assets in illiquid securities), the Trustees of the 
Fund have established guidelines to be utilized by the Fund in determining 
the liquidity of a lease obligation. The factors to be considered in making 
the determination include: 1) the frequency of trades and quoted prices for 
the obligation; 2) the number of dealers willing to purchase or sell the 
security and the number of other potential purchasers; 3) the willingness of 
dealers to undertake to make a market in the security; and 4) the nature of 
the marketplace trades, including, the time needed to dispose of the 
security, the method of soliciting offers, and the mechanics of the transfer. 

   The interest rates payable on certain Municipal Bonds and Municipal Notes 
are not fixed and may fluctuate based upon changes in market rates. Municipal 
obligations of this type are called "variable rate" obligations. The interest 
rate payable on a variable rate obligation is adjusted either at 
predesignated periodic intervals or whenever there is a change in the market 
rate of interest on which the interest rate payable is based. 

   The foregoing percentage and rating policies apply at the time of 
acquisition of a security based on the last previous determination of the 
Fund's net asset value. Any subsequent change in any rating by a rating 
service or change in percentages resulting from market fluctuations or other 
changes in the Fund's total assets will not require elimination of any 
security from the Fund's portfolio until such time as the Investment Manager 
determines that it is practicable to sell the security without undue market 
or tax consequences to the Fund. 

                                       9
<PAGE>

   The ratings assigned by Moody's and S&P represent their opinions as to the 
quality of the securities which they undertake to rate (see the Appendix to 
the Statement of Additional Information). It should be emphasized, however, 
that the ratings are general and not absolute standards of quality. 

   When-Issued and Delayed Delivery Securities.  The Fund may purchase 
tax-exempt 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 
transaction. These securities are subject to market fluctuation and no 
interest accrues to the purchaser prior to settlement. At the time the Fund 
makes the commitment to purchase such securities, it will record the 
transaction and thereafter reflect the value, each day, of such securities in 
determining its net asset value. 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. 

   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. 

RISK CONSIDERATIONS AND INVESTMENT PRACTICES 

   The value of the Fund's portfolio securities and, therefore, the Fund's 
net asset value per share, may increase or decrease due to various factors, 
principally changes in prevailing interest rates and the ability of the 
issuers of the Fund's portfolio securities to pay interest and principal on 
such obligations on a timely basis. Generally, a rise in interest rates will 
result in a decrease in the Fund's net asset value per share, while a drop in 
interest rates will result in an increase in the Fund's net asset value per 
share. The Fund's yield will also vary based on the yield of the Fund's 
portfolio securities. 

   Futures Contracts and Options on Futures. The Fund may enter into 
financial futures contracts ("futures contracts"), options on such futures 
and municipal bond index futures contracts for hedging purposes. The Fund may 
sell a futures contract or a call option thereon or purchase a put option on 
such futures contract, if the Investment Manager anticipates interest rates 
to rise, as a hedge against a decrease in the value of the Fund's portfolio 
securities. If the Investment Manager anticipates that interest rates will 
decline, the Fund may purchase a futures contract or a call option thereon or 
sell a put option on such futures contract, to protect against an increase in 
the price of the securities the Fund intends to purchase. These futures 
contracts and related options thereon will be used only as a hedge against 
anticipated interest rate changes. A futures contract sale creates an 
obligation by the Fund, as seller, to deliver the specific type of instrument 
called for in the contract at a specified future time for a specified price. 
A futures contract purchase creates an obligation by the Fund, as purchaser, 
to take delivery of the specific type of financial instrument at a specified 
future time at a specified price. The specific securities delivered or taken, 
respectively, 

                                      10
<PAGE>

at settlement date, would not be determined until or near that date. The 
determination would be in accordance with the rules of the exchange on which 
the futures contract sale or purchase was effected. 

   Although the terms of futures contracts specify actual delivery or receipt 
of securities, in most instances the contracts are closed out before the 
settlement date without the making or taking of delivery of the securities. 
Closing out of a futures contract is effected by entering into an offsetting 
purchase or sale transaction. 

   Unlike a futures contract, which requires the parties to buy and sell a 
security on a set date, an option on a futures contract entitles its holder 
to decide on or before a future date whether to enter into such a contract (a 
long position in the case of a call option and a short position in the case 
of a put option). If the holder decides not to enter into the contract, the 
premium paid for the option on the contract is lost. Since the value of the 
option is fixed at the point of sale, there are not daily payments of cash to 
reflect the change in the value of the underlying contract as there are by a 
purchaser or seller of a futures contract. The value of the option does 
change and is reflected in the net asset value of the Fund. 

   A risk in employing futures contracts to protect against the price 
volatility of portfolio securities is that the prices of securities subject 
to futures contracts may correlate imperfectly with the behavior of the cash 
prices of the Fund's portfolio securities. The risk of imperfect correlation 
may be increased by the fact that the Fund will invest in futures contracts 
on taxable securities and there is no guarantee that the prices of taxable 
securities will move in a similar manner to the prices of tax-exempt 
securities. The correlation may be distorted by the fact that the futures 
market is dominated by short-term traders seeking to profit from the 
difference between a contract or security price objective and their cost of 
borrowed funds. Such distortions are generally minor and would diminish as 
the contract approached maturity. 

   Another risk is that the Fund's manager could be incorrect in its 
expectations as to the direction or extent of various interest rate movements 
or the time span within which the movements take place. For example, if the 
Fund sold futures contracts for the sale of securities in anticipation of an 
increase in interest rates, and then interest rates went down instead, 
causing bond prices to rise, the Fund would lose money on the sale. 

   In addition to the risks that apply to all options transactions (see the 
Statement of Additional Information for a description of the characteristics 
of, and the risks of investing in, options on debt securities), there are 
several special risks relating to options on futures; in particular, the 
ability to establish and close out positions on options on futures will be 
subject to the development and maintenance of a liquid secondary market. It 
is not certain that this market will develop or be maintained. 

   Municipal Bond Index Futures. The Fund may utilize municipal bond index 
futures contracts and options thereon for hedging purposes. The Fund's 
strategies in employing such contracts will be similar to that discussed 
above with respect to financial futures and options thereon. A municipal bond 
index is a method of reflecting in a single number the market value of many 
different municipal bonds and is designed to be representative of the 
municipal bond market generally. The index fluctuates in response to changes 
in the market values of the bonds included within the index. Unlike futures 
contracts on particular financial instruments, transactions in futures on a 
municipal bond index will be settled in cash, if held until the close of 
trading in the contract. However, like any other futures contract, a position 
in the contract may be closed out by purchase or sale of an offsetting 
contract for the same delivery month prior to expiration of the contract. 

   The Fund may not enter into futures contracts or purchase related options 
thereon if immediately thereafter the amount committed to margin plus the 
amount paid for premiums for unexpired options on futures contracts exceeds 
5% of the value of the Fund's total assets. The Fund may not purchase or sell 
futures contracts or related options thereon if, immediately thereafter, more 
than one-third of its net assets would be hedged. 

                                      11
<PAGE>

   For a discussion of the risks of certain types of Municipal Obligations, 
such as lease obligations, see above in "Investment Objective and Policies." 

PORTFOLIO MANAGEMENT 

   The Fund is actively managed by the 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, including Dean Witter Reynolds Inc. 
("DWR") and other broker-dealer affiliates of InterCapital, the views of 
others regarding economic developments and interest rate trends, and the 
Investment Manager's own analysis of factors it deems relevant. The Fund is 
managed within InterCapital's Tax-Exempt Group, which manages forty 
tax-exempt municipal funds and fund portfolios, with approximately $10.5 
billion in assets as of June 30, 1997. James F. Willison, Senior Vice 
President of InterCapital and Manager of InterCapital's Municipal Fixed 
Income Group and Joseph R. Arcieri, Vice President of InterCapital and a 
member of InterCapital's Municipal Fixed Income Group, have been the primary 
portfolio co-managers of the Fund since its inception and February, 1997, 
respectively, and have been portfolio managers at InterCapital for over five 
years. 

   Securities are purchased and sold principally in response to the 
Investment Manager's current evaluation of an issuer's ability to meet its 
debt obligations in the future, and the Investment Manager's current 
assessment of future changes in the levels of interest rates on tax-exempt 
securities of varying maturities. Securities purchased by the Fund are, 
generally, sold by dealers acting as principal for their own accounts. 
Pursuant to an order of the Securities and Exchange Commission, the Fund may 
effect principal transactions in certain money market instruments with DWR. 
In addition, the Fund may incur brokerage commissions on transactions 
conducted through DWR and other brokers and dealers that are affiliates of 
InterCapital. 

   The portfolio trading engaged in by the Fund may result in its portfolio 
turnover rate exceeding 100%. The Fund will incur underwriting discount costs 
(on underwritten securities) commensurate with its portfolio turnover rate. 
Additionally, see "Dividends, Distributions and Taxes" for a discussion of 
the tax policy of the Fund. 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. 

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 restrictions: (a) an "issuer" of a security 
is the entity whose assets and revenues are committed to the payment of 
interest and principal on that particular security, provided that the 
guarantee of a security will be considered a separate security, and provided 
further that a guarantee of a security shall not be deemed to be a security 
issued by the guarantor if the value of all securities issued or guaranteed 
by the guarantor and owned by the Fund does not exceed 10% of the value of 
the total assets of the Fund; (b) a "taxable security" is any security the 
interest on which is subject to federal income tax; and (c) all percentage 
limitations apply immediately after a purchase or initial investment, and any 
subsequent change in any applicable percentage resulting from market 
fluctuations or other changes in the Fund's total assets does not require 
elimination of any security from the portfolio. 

                                      12
<PAGE>

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 taxable debt securities or 
any one issuer (other than obligations issued, or guaranteed as to principal 
and interest, by the United States Government, its agencies or 
instrumentalities). 

   3. Invest more than 25% 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, its agencies or 
instrumentalities or to cash equivalents (industrial development and 
pollution control bonds are grouped into industries based upon the business 
in which the issuers of such obligations are engaged). 

   4. Invest more than 5% of the value of its total assets in taxable 
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 of the United States Government, its agencies or 
instrumentalities. 

   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 
Dean Witter Distributors Inc. (the "Distributor"), an affiliate of the 
Investment Manager, shares of the Fund are distributed by the Distributor and 
offered by DWR and other dealers who have entered into agreements with the 
Distributor ("Selected Broker-Dealers"). 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 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 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, 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 Arrange ments--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 or more and 
to certain other limited categories of investors. For the purpose of meeting 
the minimum $5 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 Dean 
Witter Funds that are multiple class funds 

                                      13
<PAGE>

("Dean Witter Multi-Class Funds") and shares of Dean Witter Funds sold with a 
front-end sales charge ("FSC Funds") and concurrent investments in Class D 
shares of the Fund and other Dean Witter Multi-Class Funds will be 
aggregated. Subsequent purchases of $100 or more may be made by sending a 
check, payable to Dean Witter Tax-Exempt Securities Trust, directly to Dean 
Witter Trust Company (the "Transfer Agent") at P.O. Box 1040, Jersey City, 
N.J. 07303 or by contacting an account executive of DWR or other Selected 
Broker-Dealer. 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 (Service Mark), 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. In the case of purchases made pursuant to 
systematic payroll deduction plans, the Fund, in its discretion, may accept 
such purchases without regard to any minimum amounts which would otherwise be 
required if the Fund has reason to believe that additional purchases will 
increase the amount of the purchase of shares 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 generally is due on or before 
the third business day (settlement date) after the order is placed with 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 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/or the Distributor reserve the right to reject any 
purchase order. 

   Analogous Dean Witter Funds. The Distributor and the Investment Manager 
serve in the same capacities for Dean Witter National Municipal Trust, an 
open-end investment company with investment objectives and policies similar 
to those of the Fund. Shares of Dean Witter National Municipal Trust are 
offered to the public at net asset value, with a CDSC assessed upon 
redemptions within three years of purchase, as well as an annual Rule 12b-1 
distribution fee. The Classes of the Fund and Dean Witter National Municipal 
Trust have differing fees and expenses, which will affect performance. 
Investors who would like to receive a prospectus for Dean Witter National 
Municipal Trust should call the telephone numbers listed on the front cover 
of this Prospectus, or may call their account executive for additional 
information. 

   The Boards of Trustees of the Fund and of Dean Witter National Municipal 
Trust have approved a reorganization plan whereby Dean Witter National 
Municipal Trust would be merged into the Fund. This plan is subject to the 
consent of the Dean Witter National Municipal Trust shareholders. If 
approved, the Funds' assets would be combined and Dean Witter National 
Municipal Trust shareholders would become shareholders of the Fund, receiving 
Class B shares of the Fund equal to the value of their holdings in Dean 
Witter National Municipal Trust. A proxy statement formally detailing the 
proposal will be distributed to Dean Witter National Municipal Trust 
shareholders in August 1997. 

                                      14
<PAGE>

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. This CDSC may be waived for 
certain redemptions. Class B shares are also subject to an annual 12b-1 fee 
of 0.60% of 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 0.70% 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: 

                                      15
<PAGE>

   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 0.70% (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 minimum investment amount for 
Class D shares, holdings of Class A shares in all Dean Witter Multi-Class 
Funds, shares of FSC Funds and shares of Dean Witter Funds for which such 
shares have been 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 
- -------------------------------------------------------------------------------
<S>           <C>                         <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%                0.60%         B shares convert 
              CDSC during the first                     to A shares 
              year decreasing                           automatically 
              to 0 after six years                      after 
                                                        approximately 
                                                        ten years 
- -------------------------------------------------------------------------------
     C        1.0% CDSC during            0.70%              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 

                                      16
<PAGE>

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 SINGLE    PUBLIC OFFERING  PERCENTAGE OF 
     TRANSACTION           PRICE      AMOUNT 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>

   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 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 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 Dean Witter Funds 
previously purchased at a price including a front-end sales charge (including 
shares of the Fund and other Dean Witter Funds acquired in exchange for those 
shares, and including in each case shares 

                                      17
<PAGE>

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 equal to at least $5 million, 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 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 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 Dean Witter Trust Company ("DWTC") or Dean Witter 
Trust FSB ("DWTFSB") (each of 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 or administrative services 
(such investments are subject to all of the terms and conditions of such 
programs, which may include termination fees and restrictions on 
transferability of Fund shares); 

   (3) investors who are clients of a Dean Witter account executive who 
joined 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 account executive'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 

   (4) 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 (3), 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 

                                      18
<PAGE>

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 preceding the 
redemption. In addition, Class B shares are subject to an annual 12b-1 fee of 
0.60% of the average daily net assets of Class B. 

   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>

   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 
preceding the redemption; (ii) the current net asset value of shares 
purchased more than six 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 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; and 

   (2) redemptions in connection with the following retirement plan 
distributions:   (A) lump-sum or 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. 

   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.  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. The con- 

                                      19
<PAGE>

version of shares 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 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 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 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 
0.70% 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 and the 
following categories of investors: (i) investors participating in the 
InterCapital 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 or 
administrative services (subject to all of the terms and conditions of such 
programs, which may include termination fees and restrictions on 
transferability of Fund shares); (iii) certain Unit Investment Trusts 
sponsored by DWR; (iv) certain other open-end investment companies whose 
shares are distributed by the Distributor; and (v) other categories of 
investors, at the discretion of the Board, as disclosed in the then current 
prospectus of the Fund. All shares of the Fund held prior to 

                                      20
<PAGE>

July 28, 1997 have been designated Class D shares. Additional investments in 
Class D shares by shareholders holding such shares may only be made if those 
shareholders are otherwise eligible to purchase Class D shares. However, 
shareholders holding such shares will receive the benefit of the value of 
such shares towards reduced sales charges on purchases of Class A shares 
pursuant to the Fund's "Right of Accumulation" (see "Initial Sales Charge 
Alternative--Class A Shares--Right of Accumulation"). Investors who require a 
$5 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 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 minimum 
investment amount, holdings of Class A shares in all Dean Witter Multi-Class 
Funds, shares of FSC Funds and shares of 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 

   Effective July 28, 1997, 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 0.70% 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 0.60% of 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 0.15% 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 DWR's account 
executives 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. 

   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 expense would amount to $250,000. Because there is no requirement 
under the Plan that the Distributor be reimbursed for all 

                                      21
<PAGE>

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 0.70% 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 account executives at the 
time of sale may be reimbursed in the subsequent calendar year. 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, on each day that the New York Stock Exchange is open (or, on days 
when the New York Stock Exchange closes prior to 4:00 p.m., at such earlier 
time), 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. 

   Portfolio securities (other than short-term taxable debt securities, 
futures and options) are valued for the Fund by an outside independent 
pricing service approved by the Fund's Trustees. The service may utilize a 
computerized grid matrix of tax-exempt securities and evaluations by its 
staff in determining what it believes is the fair value of the Fund's 
portfolio securities. The Board believes that timely and reliable market 
quotations are generally not readily available to the Fund for purposes of 
valuing tax-exempt securities and that the valuations supplied by the pricing 
services are more likely to approximate the fair value of such securities. 

   Short-term taxable debt securities with remaining maturities of sixty days 
or less at time of purchase are valued at amortized cost, unless the Board 
determines such does not reflect the securities' market value, in which case 
these securities will be valued at their fair value as determined by the 
Board of Trustees. Other taxable short-term debt securities with maturities 
of more than sixty days will be valued on a mark to market basis until such 
time as they reach a 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 market value as determined by 
the Board of Trustees. Listed options on debt securities are valued at the 
latest sale price on the exchange on which they are listed unless no sales of 
such options have taken place that day, in which case, they will be valued at 
the mean between their closing bid and asked prices. Unlisted options on debt 
securities are valued at the mean between their latest bid and asked price. 
Futures are valued at the latest sale price on the commodities exchange on 
which they trade unless the Board of Trustees determines that such price does 
not reflect their fair value, in which case they will be valued at their fair 
market value as determined by the Board of 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 Board of Trustees. 

                                      22
<PAGE>

SHAREHOLDER SERVICES 
- ----------------------------------------------------------------------------- 

   Automatic Investment of Dividends and Distri-butions. 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 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 checks 
during the first ten days of the following month. 

   Investment of Dividends and 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"). 

   EasyInvest (Service Mark). Shareholders may subscribe to EasyInvest, an 
automatic purchase plan which pro-vides 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 Dean Witter money market fund, on a semi-monthly, 
monthly or quarterly basis, to the Transfer Agent for investment in shares of 
the Fund (see "Purchase of Fund Shares" and "Redemptions and 
Repurchases--Involuntary Redemption"). 

   Systematic Withdrawal Plan. A systematic withdrawal plan (the "Withdrawal 
Plan") is available for shareholders who own or purchase shares of the Fund 
having a minimum value of $10,000 based upon the then current net asset 
value. The plan provides for monthly or quarterly (March, June, September, 
December) checks in any dollar amount, not less than $25, or in any whole 
percentage of the account balance, on an annualized basis. Any applicable 
CDSC will be imposed on shares redeemed under the Withdrawal Plan (see 
"Purchase of Fund Shares"). Therefore, 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 or quarterly amount. 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. 

   Shareholders should contact their DWR or other Selected Broker-Dealer 
account executive or the Transfer Agent for further information about any of 
the above services. 

EXCHANGE PRIVILEGE 

   Shares of each Class may be exchanged for shares of the same Class of any 
other Dean Witter Multi-Class Fund without the imposition of any exchange 
fee. Shares may also be exchanged for shares of the following funds: Dean 
Witter Short-Term U.S. Treasury Trust, Dean Witter Limited Term Municipal 
Trust, Dean Witter Short-Term Bond Fund, Dean Witter Intermediate Term U.S. 
Treasury Trust and five Dean Witter funds which are money market funds (the 
"Exchange Funds"). Class A shares may also be exchanged for shares of Dean 
Witter Multi-State Municipal Series Trust and Dean Witter 

                                      23
<PAGE>

Hawaii Municipal Trust, which are Dean Witter Funds sold with a front-end 
sales charge ("FSC Funds"). Class B shares may also be exchanged for shares 
of Dean Witter Global Short-Term Income Fund Inc., Dean Witter High Income 
Securities and Dean Witter National Municipal Trust, which are Dean Witter 
Funds offered with a CDSC ("CDSC 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 holding period for 
exchanges of shares acquired by exchange or dividend reinvestment. 

   An exchange to another Dean Witter Multi-Class Fund, any FSC Fund, any 
CDSC 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 money 
market funds and any of the Dean Witter Multi-Class Funds, FSC Funds or CDSC 
Funds or any Exchange Fund that is not a 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 Dean 
Witter Multi-Class Fund or shares of a CDSC 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 Dean Witter Multi-Class Fund or shares of a 
CDSC Fund are reacquired. Thus, the CDSC is based upon the time (calculated 
as described above) the shareholder was invested in shares of a Dean Witter 
Multi-Class Fund or in shares of a CDSC 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. 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. (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 Dean Witter Multi-Class 
Fund or shares of a CDSC 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 shoud be aware that the Fund and each of the 
other 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 to the shareholder not later than ten days following such 
shareholder's most recent exchange. Also, the 

                                      24
<PAGE>

Exchange Privilege may be terminated or revised at any time by the Fund 
and/or any of such Dean Witter Funds for which shares of the Fund may be 
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 account executive regarding 
restrictions on exchange of shares of the Fund pledged in their margin 
account. 

   The current prospectus for each fund describes its investment objective(s) 
and policies, and shareholders should obtain one and read it carefully before 
investing. Exchanges are subject to the minimum investment requirement of 
each Class of shares and 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 as a redemption or repurchase of 
shares, on which the shareholder may realize a capital gain or loss. However, 
the ability to deduct capital losses on an exchange is limited in situations 
where there is an exchange of shares within ninety days after the shares are 
purchased. There are also limits on the deduction of losses after the payment 
of exempt-interest dividends for shares held for less than six months (see 
"Dividends, Distributions and Taxes"). 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 Dean 
Witter Funds (for which the Exchange Privilege is available) pursuant to this 
Exchange Privilege by contacting their DWR or other Selected Broker-Dealer 
account executive (no Exchange Privilege Authorization Form is required). 
Other shareholders (and those shareholders who are clients of DWR or another 
Selected Broker-Dealer 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 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 DWR or other 
Selected Broker-Dealer account executive, if appropriate, or make a written 
exchange request (see "Redemptions and Repurchases"). 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 case with the Dean Witter Funds in 
the past. 

   For further information regarding the Exchange Privilege, shareholders 
should contact their DWR or other Selected Broker-Dealer account executive or 
the Transfer Agent. 

                                      25
<PAGE>

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 information 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 request of the shareholder. The repurchase price is the 
net asset value next determined (see "Purchase of Fund Shares") after such 
repurchase order is received by DWR or other Selected Broker-Dealer reduced 
by any applicable CDSC. 

   The CDSC, if any, will be the only fee imposed by the Fund, the 
Distributor, DWR or other Selected Broker-Dealers. The offer by DWR and other 
Selected Broker-Dealers to repurchase shares from shareholders may be 
suspended 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 at times 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 account executive regarding restrictions 
on redemption of shares of the Fund pledged in the margin account. 

   Reinstatement Privilege. A shareholder who has had his or her share 
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, on sixty days' 
notice, to redeem at net asset value the shares 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 Board of Trustees or, in the 
case of an account opened through EasyInvest, 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. 

                                      26
<PAGE>

DIVIDENDS, DISTRIBUTIONS AND TAXES 
- ----------------------------------------------------------------------------- 

   Dividends and Distributions. The Fund declares dividends separately for 
each Class from net investment income on each day the New York Stock Exchange 
is open for business to shareholders of record as of the close of business 
the preceding business day. The amount of such dividends may fluctuate from 
day to day. Such dividends are paid monthly. The Fund intends to distribute 
all of its net investment income on an annual basis. 

   The Fund will distribute at least once each year all net realized 
short-term capital gains in excess of any realized net long-term capital 
losses, if any. The Fund intends to distribute all of its realized net 
long-term capital gains, if any, in excess of any realized net short-term 
capital losses and any available net capital loss carryovers, at least once 
per fiscal year, although it may elect to retain all or part of such gains 
for reinvestment. Taxable capital gains may be generated by the sale of 
portfolio securities and by transactions in options and futures contracts 
engaged in by the Fund. 

   All dividends and any capital gains distributions will be paid in 
additional Fund 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 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 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.") Any 
dividends declared in the last quarter of any calendar year which are paid in 
the following calendar year prior to February 1 will be deemed received by 
the shareholder in the prior calendar year. 

   Taxes. Because the Fund intends to distribute all of its net investment 
income and capital gains to shareholders and intends to 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. 

   The Fund intends to qualify to pay "exempt-interest dividends" to its 
shareholders by maintaining, as of the close of each quarter of its taxable 
year, at least 50% of the value of its total assets in tax-exempt securities. 
If the Fund satisfies such requirement, distributions from net investment 
income to shareholders, whether taken in cash or reinvested in additional 
shares, will be excludable from gross income for federal income tax purposes 
to the extent net investment income is represented by interest on tax-exempt 
securities. Exempt-interest dividends are included, however, in determining 
what portion, if any, of a person's Social Security benefits are subject to 
federal income tax. The Internal Revenue Code may subject interest received 
on certain otherwise tax-exempt securities to an alternative minimum tax. 
This alternative minimum tax may be incurred due to interest received on 
certain "private activity bonds" (in general, bonds that benefit 
non-government entities) issued after August 7, 1986 which, although 
tax-exempt, are used for purposes other than those generally performed by 
government units (e.g., bonds used for commercial or housing purposes). 
Income received on such bonds is classified as a "tax preference item," under 
the alternative minimum tax, for both individual and corporate investors. The 
Fund anticipates that a portion of its investments will be made in such 
"private activity bonds," with the result that a portion of the 
exempt-interest dividends paid by the Fund will be an item of tax preference 
to shareholders subject to the alternative minimum tax. In addition, certain 
corporations which are subject to the alternative minimum tax may also have 
to include exempt-interest dividends in calculating their alter- 

                                      27
<PAGE>

native minimum taxable income in situations where the "adjusted current 
earnings" of the corporation exceeds its alternative minimum taxable income. 

   Under the Revenue Reconciliation Act of 1993, all or a portion of the 
Fund's gain from the sale or redemption of tax-exempt obligations purchased 
at a market discount after April 30, 1993 will be treated as ordinary income 
rather than capital gain. This rule may increase the amount of ordinary 
income dividends received by shareholders. 

   Within sixty days after the end of its fiscal year, the Fund will mail to 
its shareholders a statement indicating the percentage of the dividend 
distributions for such fiscal year which constitutes exempt-interest 
dividends and the percentage, if any, that is taxable, and the percentage, if 
any, of the exempt-interest dividends which constitutes an item of tax 
preference. 

   Shareholders will normally be subject to federal income tax on dividends 
paid from interest income derived from taxable securities and on 
distributions of net short-term capital gains, if any. Distributions of 
long-term capital gains, if any, are taxable as long-term capital gains, 
regardless of how long the shareholder has held the Fund shares and 
regardless of whether the distribution is received in additional shares or in 
cash. To avoid being subject to a 31% federal backup withholding tax on 
taxable dividends, capital gains distributions and proceeds of redemptions or 
repurchases, shareholders' taxpayer identification numbers must be furnished 
and certified as to accuracy. 

   Any loss on the sale or exchange of shares of the Fund which are held for 
six months or less is disallowed to the extent of the amount of any 
exempt-interest dividend paid with respect to such shares. Treasury 
Regulations may provide for a reduction in such required holding periods. If 
a shareholder receives a distribution that is taxed as a long-term capital 
gain on shares held for six months or less and sells those shares at a loss, 
the loss will be treated as a long-term capital loss. 

   Interest on indebtedness incurred by shareholders to purchase or carry 
shares of an investment company paying exempt-interest dividends, such as the 
Fund, will not be deductible by the investor for federal income tax purposes. 

   The exemption of interest income for federal income tax purposes does not 
necessarily result in exemption under the income or other tax laws of any 
state or local taxing authority. Thus, shareholders of the Fund may be 
subject to state and local taxes on exempt-interest dividends. 

   The Fund may at times make payments from sources other than income or net 
capital gains. Payments from such sources will, in effect, represent a return 
of a portion of each shareholder's investment. All, or a portion, of such 
payments will not be taxable to shareholders. 

   Shareholders should consult their tax advisers as to the applicability of 
the above to their own tax situation. 

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 Fund may also quote 
tax-equivalent yield, which is calculated by determining the pre-tax yield 
for each 

                                      28
<PAGE>

Class which, after being taxed at a stated rate, would be equivalent to the 
yield determined as described above. 

   The "average annual total return" of the Fund refers to a figure 
reflecting the average annualized 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. 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 which 
would be 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. Such calculations may or 
may not reflect the deduction of any sales charge which, if reflected, would 
reduce the performance quoted. The Fund may also advertise the growth of 
hypothetical investments of $10,000, $50,000 or $100,000 in each Class of 
shares of the Fund. 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.). 

   Prior to July 28, 1997, the Fund offered only one Class of shares. Because 
the distribution arrangement for Class A most closely resembles the 
distribution arrangement applicable prior to the implementation of multiple 
classes, historical performance information may be restated to reflect the 
current maximum sales charge applicable to Class A. In addition, because all 
shares of the Fund held prior to July 28, 1997 have been designated Class D 
shares, the Fund's historical performance may also be restated to reflect the 
absence of any sales charge in the case of Class D shares. 

ADDITIONAL INFORMATION 
- ----------------------------------------------------------------------------- 

   Voting Rights. All shares of beneficial interest of the Fund are of $.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 certain 
circumstances the Trustees may be removed by action of the Trustees or by the 
shareholders. 

   Under Massachusetts law, shareholders of a business trust may, under 
certain circumstances, be held personally liable as partners for the 
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 share holder 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's being unable to meet its 
obligations is remote and, in the opinion of Massa- 

                                      29
<PAGE>

chusetts counsel to the Fund, the risk to Fund shareholders of personal 
liability is remote. 

   Code of Ethics. Directors, officers and employees of InterCapital, Dean 
Witter Services Company Inc. and the Distributor 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 Dean Witter Fund is engaged at 
the same time in a purchase or sale of 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 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. 

                                      30
<PAGE>

                        THE DEAN WITTER FAMILY OF FUNDS

MONEY MARKET FUNDS 
Dean Witter Liquid Asset Fund Inc. 
Dean Witter Tax-Free Daily Income Trust 
Dean Witter U.S. Government Money Market Trust 
Dean Witter California Tax-Free Daily Income Trust 
Dean Witter New York Municipal Money Market Trust 

EQUITY FUNDS 
Dean Witter American Value Fund 
Dean Witter Natural Resource Development Securities Inc. 
Dean Witter Dividend Growth Securities Inc. 
Dean Witter Developing Growth Securities Trust 
Dean Witter World Wide Investment Trust 
Dean Witter Value-Added Market Series 
Dean Witter Utilities Fund 
Dean Witter Capital Growth Securities 
Dean Witter European Growth Fund Inc. 
Dean Witter Pacific Growth Fund Inc. 
Dean Witter Precious Metals and Minerals Trust 
Dean Witter Health Sciences Trust 
Dean Witter Global Dividend Growth Securities 
Dean Witter Global Utilities Fund 
Dean Witter International SmallCap Fund 
Dean Witter Mid-Cap Growth Fund 
Dean Witter Balanced Growth Fund 
Dean Witter Capital Appreciation Fund 
Dean Witter Information Fund 
Dean Witter Japan Fund 
Dean Witter Income Builder Fund 
Dean Witter Special Value Fund 
Dean Witter Financial Services Trust 
Dean Witter Market Leader Trust 

ASSET ALLOCATION FUNDS 
Dean Witter Strategist Fund 
Dean Witter Global Asset Allocation Fund 

ACTIVE ASSETS ACCOUNT PROGRAM 
Active Assets Money Trust 
Active Assets Tax-Free Trust 
Active Assets California Tax-Free Trust 
Active Assets Government Securities Trust 

FIXED-INCOME FUNDS 
Dean Witter High Yield Securities Inc. 
Dean Witter Tax-Exempt Securities Trust 
Dean Witter U.S. Government Securities Trust 
Dean Witter Federal Securities Trust 
Dean Witter Convertible Securities Trust 
Dean Witter California Tax-Free Income Fund 
Dean Witter New York Tax-Free Income Fund 
Dean Witter World Wide Income Trust 
Dean Witter Intermediate Income Securities 
Dean Witter Global Short-Term Income Fund Inc. 
Dean Witter Multi-State Municipal Series Trust 
Dean Witter Short-Term U.S. Treasury Trust 
Dean Witter Diversified Income Trust 
Dean Witter Limited Term Municipal Trust 
Dean Witter Short-Term Bond Fund 
Dean Witter National Municipal Trust 
Dean Witter High Income Securities 
Dean Witter Balanced Income Fund 
Dean Witter Hawaii Municipal Trust 
Dean Witter Intermediate Term U.S. Treasury Trust 

DEAN WITTER RETIREMENT SERIES 
Liquid Asset Series 
U.S. Government Money Market Series 
U.S. Government Securities Series 
Intermediate Income Securities Series 
American Value Series 
Capital Growth Series 
Dividend Growth Series 
Stategist Series 
Utilities Series 
Value-Added Market Series 
Global Equity Series 

<PAGE>

Dean Witter 
Tax-Exempt Sscurities Trust 

Two World Trade Center 
New York, New York 10048 


TRUSTEES 

Michael Bozic 
Charles A. Fiumefreddo 
Edwin J. Garn 
John R. Haire 
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 

James F. Willison 
Vice President 

Joseph R. Arcieri 
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 

Dean Witter Trust Company 
Harborside Financial Center 
Plaza Two 
Jersey City, New Jersey 07311 


INDEPENDENT ACCOUNTANTS 

Price Waterhouse LLP 
1177 Avenue of the Americas 
New York, New York 10036 


INVESTMENT MANAGER 

Dean Witter InterCapital Inc. 


DEAN WITTER 
TAX-EXEMPT 
SECURITIES 
TRUST 

PROSPECTUS--JULY 28, 1997

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST
LETTER TO THE SHAREHOLDERS December 31, 1996

                              Two World Trade Center, New York, New York 10048

DEAR SHAREHOLDER: 

We are pleased to present the annual report on the operations of Dean Witter 
Tax-Exempt Securities Trust for the year ended December 31, 1996. 

After accelerating in the first half of 1996, domestic economic growth 
moderated during the summer. Inflation remained under control despite full 
employment and stronger growth in the fourth quarter. The need for a 
tightening move by the Federal Reserve Board abated. Market confidence 
improved under these conditions and fixed-income yields moved lower in the 
second half of the year. 

MUNICIPAL MARKET CONDITIONS 

Long insured revenue bond yields rose from 5.40 percent in February to reach 
6.15 percent in April and again in mid-June. Subsequently, demand for 
municipal bonds improved and followed the trend of U.S. Treasury securities 
to lower yields. By the end of December, insured bond yields stood at 5.60 
percent. The yield curve pickup for extending maturities from 1 to 30 years 
was 210 basis points. 

The ratio of insured revenue bond yields to 30-year U.S. Treasury yields, 
fell from 92 to 84 percent during the year. A declining ratio means that 
municipal bond prices outperformed U.S. Treasury prices. The ratio's average 
range for the past three years has been as low (rich) as 81 and as high 
(cheap) as 92 percent. The relative improvement in municipals occurred when 
flat-tax proposals failed to gain public support. 

The municipal market achieved a balance between new-issue supply and maturing 
securities in 1996. New-issue volume increased 14 percent to $183 billion. 
Maturities and redemptions of older issues essentially matched underwriting 
volume. 

PERFORMANCE 

Dean Witter Tax-Exempt Securities Trust's total return for the year ended 
December 31, 1996 was 3.61 percent. The Fund's net asset value declined from 
$12.09 to $11.77 per share. Tax-free dividends of $0.65 per share and taxable 
long-term capital gains distributions of $0.08 per share were paid during the 
period. Dividends from tax-exempt income gave the Fund a 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
LETTER TO THE SHAREHOLDERS, continued 

positive total return. The trailing 30-day SEC yield and distribution yield 
on December 31, 1996 were 4.69 percent and 5.22 percent, respectively. 


DEAN WITTER TAX-EXEMPT SECURITIES TRUST

                               GROWTH OF $10,000

      DATE                TOTAL               LEHMAN IX          LIPPER IX
==============================================================================
December 31, 1986        $ 9,600               $10,000            $10,000
==============================================================================
December 31, 1987        $ 9,462               $10,151            $ 9,932
==============================================================================
December 31, 1988        $10,693               $11,182            $11,090
==============================================================================
December 31, 1989        $11,828               $12,389            $12,195
==============================================================================
December 31, 1990        $12,520               $13,292            $12,926
==============================================================================
December 31, 1991        $14,111               $14,906            $14,483
==============================================================================
December 31, 1992        $15,394               $16,220            $15,772
- ------------------------------------------------------------------------------
December 31, 1993        $17,123               $18,212            $17,732
- ------------------------------------------------------------------------------
December 31, 1994        $16,172               $17,271            $16,661
- ------------------------------------------------------------------------------
December 31, 1995        $18,981               $20,286            $19,545
- ------------------------------------------------------------------------------
December 31, 1996        $19,667(3)            $21,185            $20,190
==============================================================================

                          AVERAGE ANNUAL TOTAL RETURNS

              1 YEAR              5 YEARS              10 YEARS     
          ==========================================================
              3.61(1)             6.86(1)               7.44(1)
          ----------------------------------------------------------
             -0.53(2)             6.00(2)               7.00(2)
          ==========================================================

         ============================================================
                 Fund          Lehman IX (4)           Lipper IX (5)
         -------       -------                 -------
         ============================================================

Past performance is not predictive of future returns.
- -----------------------------
(1) Figure shown assumes reinvestment of all distributions and does not reflect
    the deduction of any sales charges.

(2) Figure shown assumes reinvestment of all distributions and the deduction of
    the maximum applicable front-end sales charge (4%). See the Fund's current
    prospectus for complete details on fees and sales charges.

(3) Closing value, assuming a complete redemption on December 31, 1996.

(4) The Lehman Brothers Municipal Bond Index tracks the performance of
    municipal bonds with maturities of 2 years or more and a minimum credit
    rating of Baa or BBB, as measured by Moody's Investors Service, Inc. or
    Standard & Poor's Corp. The Index does not include any expenses, fees, or
    charges. The Index is unmanaged and should not be considered an investment.

(5) The Lipper General Municipal Debt Funds Index is an equally-weighted
    performance index of the largest qualifying funds (based on net assets) in
    the Lipper General Municipal Debt Funds objective. The Index, which is
    adjusted for capital gains distributions and income dividends, is unmanaged
    and should not be considered an investment. There are currently 30 funds
    represented in this index.


Since its inception on March 27, 1980, the Fund has provided shareholders 
with an average annual total return of 9.67 percent. The accompanying chart 
illustrates the performance of a $10,000 investment in the Fund for the 10 
years ended December 31, 1996, versus the performance of a similar 
hypothetical investment in the issues that comprise the Lehman Brothers 
Municipal Bond Index, as well as the performance of the Lipper Analytical 
Services, Inc. General Municipal Debt Funds Index. 

PORTFOLIO STRUCTURE 

The Fund's net assets of $1.2 billion were diversified among 13 long-term 
sectors and 104 credits. Cash and short-term investments were increased to a 
range of 5 to 10 percent during 1996 in response to market volatility. 
Portfolio sales shifted to more market sensitive issues. The sales of 
discount and current-coupon issues exceeded sales of defensive, higher-coupon 
bonds with shorter calls. New purchases focused on securities with 15-to 
25-year maturities rather than 20-to 30-year maturities. Modest discount or 
premium bonds with shorter durations were favored. 

During the year the average maturity of the portfolio moved from 20 years to 
17 years. The portfolio's distribution of older, shorter-call issues and 
newer issues with longer call dates provided an average of 7 years of call 
protection. Bonds with shorter than average call protection had book yields 

<PAGE>


in excess of 6 1/2 percent. The book yields of bonds with longer call 
protection averaged less than 6 percent. The portfolio has continued to 
maintain high-quality, with 70 percent of its long-term holdings rated double 
"A" or better. 


DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
LETTER TO THE SHAREHOLDERS, continued 

PORTFOLIO STRUCTURE, continued 

(The chart below represents information which appears as a graphic in the 
 printed report)

The five largest sectors as of December 31, 1996 (% of net assets)

       FIVE LARGEST SECTORS              PERCENT
       --------------------              --------
  
       Transportation                    13%
       Electric                          12%
       General Obligation                11%
       Refunded                          10%
       Water & Sewer                     10%
       All others                        44%

Portfolio structure is subject to change


Also, a pie chart reflecting the credit ratings as of December 31, 1996
(% of Total Long-Term Portfolio)   

              CREDIT RATING                 PERCENT
              -------------                 -------

              Aaa or AAA                    47%
              Aa or AA                      23%
              A or A                        18%
              Baa or BBB                     7%
              Not Rated*                     4%
              Ba or BB                       1%

As measured by Moody's Investors Service, Inc. or Standard & Poor's Corp.

* Not rated at time of purchase; deemed by investment manager to be
comparable to investment-grade securities.

Portfolio structure is subject to change


Also, a graph reflecting the call structure as of December 31, 1996
(% of Total Long-Term Portfolio)

              YEARS BONDS CALLABLE                  PERCENT CALLABLE
              --------------------                  ----------------

                     1997                                  6%
                     1998                                  3%
                     1999                                  4%
                     2000                                  4%
                     2001                                  8%
                     2002                                 11%
                     2003                                 15%
                     2004                                  7%
                     2005                                 11%
                     2006                                 10%
                   2007-2011                              13%
                     2012+                                 8%


<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
LETTER TO THE SHAREHOLDERS, continued 

LOOKING AHEAD 


With the collapse of flat-tax proposals, municipal bonds have improved 
relative to U.S. Treasury securities. Tax-free bonds are currently near the 
"rich" end of their average range versus Treasury yields. Under these 
conditions, the Fund has accumulated an above average cash position and has 
moved to shorter maturities. If municipals were to cheapen in the future, the 
Fund would likely draw down some of its cash and extend maturities in seeking 
opportunities to pick up income. 

We appreciate your ongoing support of Dean Witter Tax-Exempt Securities Trust 
and look forward to continuing to serve your investment needs. 

Very truly yours, 


/s/ Charles A. Fiumefreddo 

CHARLES A. FIUMEFREDDO 
Chairman of the Board 

<PAGE>
DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996 

<TABLE>
<CAPTION>
  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
<S>          <C>                                                               <C>      <C>       <C>
             TAX-EXEMPT MUNICIPAL BONDS (94.5%) 
             General Obligation (11.4%) 
             North Slope Borough, Alaska, 
 $    5,000   Ser 1992 A Conv (MBIA) .........................................  5.90 %   06/30/03  $    5,358,450 
     15,000   Ser 1994 B (FSA) ...............................................  0.00     06/30/05       9,679,800 
     18,500   Ser 1995 A (MBIA) ..............................................  0.00     06/30/06      11,223,950 
     11,000   Ser 1996 B (MBIA) ..............................................  0.00     06/30/06       6,673,700 
     10,000   Ser 1996 B (MBIA) ..............................................  0.00     06/30/07       5,697,600 
      4,000  Connecticut, College Savings 1989 Ser A  ........................  0.00     07/01/08       2,209,080 
             Massachusetts, 
     20,000   Refg 1996 Ser A (AMBAC) ........................................  6.00     11/01/10      21,480,800 
     10,000   Refg 1993 Ser A ................................................  5.50     02/01/11      10,051,300 
      4,000  Clark County, Nevada, Transportation Ser 1992 A (AMBAC)  ........  6.50     06/01/17       4,518,640 
             New York City, New York, 
     10,000   1990 Ser D .....................................................  6.00     08/01/07      10,077,700 
     10,000   1990 Ser D .....................................................  6.00     08/01/08      10,053,900 
     10,000  Pennsylvania, First Ser 1995 (FGIC) .............................  5.50     05/01/12      10,074,700 
      7,500  Shelby County, Tennessee, Refg 1995 Ser A  ......................  5.625    04/01/14       7,610,025 
     20,120  King County, Washington, Ltd Tax 1995 (MBIA) ....................  6.00     01/01/23      20,632,255 
- ------------                                                                                       -------------- 
    155,120                                                                                           135,341,900 
- ------------                                                                                       -------------- 
             Educational Facilities Revenue (5.4%) 
     10,000  Indiana University, Student Fee Ser K (MBIA) ....................  5.875    08/01/20      10,089,600 
      7,000  Massachusetts Health & Educational Facilities Authority, Boston 
              University Ser 1991 (MBIA) .....................................  6.66     10/01/31       7,524,650 
     15,000  New Hampshire Higher Educational & Health Facilities Authority, 
              Dartmouth College Ser 1993 .....................................  5.375    06/01/23      14,239,800 
      2,000  New Jersey Development Authority, The Seeing Eye Inc 1991 .......  7.30     04/01/11       2,100,380 
             New York State Dormitory Authority, 
      5,000   State University Ser 1989 B ....................................  0.00     05/15/02       3,879,350 
     20,000   State University Ser 1990 B ....................................  7.00     05/15/16      21,422,400 
      5,000  Vermont Educational & Health Buildings Financing Agency, 
              Middlebury College Ser 1996 ....................................  5.375    11/01/26       4,795,450 
- ------------                                                                                       -------------- 
     64,000                                                                                            64,051,630 
- ------------                                                                                       -------------- 
             Electric Revenue (11.7%) 
     25,000  Salt River Project Agricultural Improvement & Power District, 
              Arizona, Refg 1993 Ser C .......................................  5.50     01/01/10      25,702,250 
     10,000  Sacramento Municipal Utility District, California, Refg 1994 Ser 
              I (MBIA) .......................................................  5.75     01/01/15      10,104,900 
     10,000  Municipal Electric Authority of Georgia, Fifth Crossover Ser ....  6.50     01/01/17      10,922,200 
      8,000  New York State Power Authority, General Purpose Ser CC ..........  5.25     01/01/18       7,581,200 
     15,000  Puerto Rico Electric Power Authority, Power Ser O ...............  0.00     07/01/17       4,599,750 
     15,000  South Carolina Public Service Authority, 1995 Refg Ser A 
              (AMBAC) ........................................................  6.25     01/01/22      15,957,600 
      6,000  Austin, Texas, Combined Utilities Refg Ser 1993 A ...............  5.75     11/15/13       6,019,320 
     24,000  San Antonio, Texas, Electric & Gas Refg Ser 1994 C ..............  4.70     02/01/06      23,072,160 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
             Intermountain Power Agency, Utah, 
$10,000       Refg 1996 Ser D ................................................  5.00 %   07/01/21  $    9,069,600 
 10,000       Refg 1997 Ser B (MBIA)(WI) .....................................  5.75     07/01/19       9,806,300 
 15,000      Washington Public Power System, Proj #2 Refg Ser 1994 A 
              (Secondary MBIA) ...............................................  6.00     07/01/07      16,061,850 
- ------------                                                                                       -------------- 
148,000                                                                                               138,897,130 
- ------------                                                                                       -------------- 
             Hospital Revenue (7.4%) 
 10,000      Birmingham-Carraway Special Care Facilities Financing 
              Authority, Alabama, Carraway Methodist Health Systems Ser 1995 
              A (Connie Lee) .................................................  6.25     08/15/09      10,808,000 
  3,000      Baxter County, Arkansas, Baxter County Regional Hospital Inc 
              Impr & Refg Ser 1992 ...........................................  7.50     09/01/21       3,216,660 
 10,000      California Health Facilities Financing Authority, Kaiser 
              Permanente Ser 1985 ............................................  5.55     08/15/25       9,544,900 
  1,500      Massachusetts Health & Educational Facilities Authority, Malden 
              Hospital - FHA Ins Mtge Ser A ..................................  5.00     08/01/16       1,343,580 
             Rochester, Minnesota, 
  5,000       Mayo Foundation/Mayo Medical Center Ser 1992 I .................  5.75     11/15/21       4,999,600 
  3,700       Mayo Foundation/Mayo Medical Center Ser 1992 F .................  6.25     11/15/21       3,870,274 
 10,000      Missouri Health & Educational Facilities Authority, 
              Barnes-Jewish Inc/Christian Health Services Ser 1993 A .........  5.25     05/15/14       9,581,600 
  6,000      New York State Medical Care Facilities Finance Agency, 
              Presbyterian Hospital-FHA Ins Mtge 1984 Ser A Refg .............  5.25     08/15/14       5,779,320 
 10,000      Charlotte-Mecklenburg County Hospital Authority, North Carolina, 
              Ser 1992 .......................................................  6.00     01/01/22      10,136,700 
  5,000      University of North Carolina, Hospitals at Chapel Hill Ser 1996 .  5.00     02/15/29       4,486,600 
  4,000      Cuyahoga County, Ohio, The Cleveland Clinic Foundation Refg Ser 
              1988 A .........................................................  8.00     12/01/15       4,156,680 
  5,000      North Central Texas Health Facilities Development Corporation, 
              University Medical Center Inc Ser 1997 (FSA) (WI) ..............  5.45     04/01/15       4,889,900 
  7,000      Fairfax County Industrial Development Authority, Virginia, Inova 
              Health System Foundation Refg Ser 1993 A .......................  5.25     08/15/19       6,601,840 
 10,000      Fredericksburg Industrial Development Authority, Virginia, 
              Medicorp Health System Refg Ser 1996 (AMBAC) ...................  5.25     06/15/16       9,634,000 
- ------------                                                                                       -------------- 
 90,200                                                                                                89,049,654 
- ------------                                                                                       -------------- 
             Industrial Development/Pollution Control Revenue (6.7%) 
  1,300      Jefferson County, Kentucky, Louisville Gas & Electric Co 1993 
              Ser B ..........................................................  5.625    08/15/19       1,289,223 
  1,450      Maryland Industrial Development Financing Authority, Medical 
              Waste Assocs LP 1989 Ser (AMT) .................................  8.75     11/15/10       1,450,000 
  5,000      Becker, Minnesota, Northern States Power Co Ser A 1989 ..........  6.80     04/01/07       5,300,250 
 15,000      Claiborne County, Mississippi, Middle South Energy Inc Ser C  ...  9.875    12/01/14      16,619,100 
 10,000      Clark County, Nevada, Nevada Power Co Ser 1992 A (AMT) (FGIC) ...  6.70     06/01/22      10,757,700 
 10,000      Washoe County, Nevada, Sierra Pacific Power Co Ser 1987 (AMBAC) .  6.30     12/01/14      10,585,600 
  5,000      Alliance Airport Authority, Texas, AMR Corp Ser 1990 (AMT) ......  7.50     12/01/29       5,355,400 
 10,000      Dallas-Fort Worth International Airport Facility Improvement 
              Corporation, Texas, American Airlines Inc Ser 1995 .............  6.00     11/01/14       9,923,400 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
$ 7,000      Matagorda County Navigation District #1, Texas, Central Power & 
              Light Co Collateralized Ser 1984 A .............................  7.50 %   12/15/14  $    7,718,830 
 10,000      Weston, Wisconsin, Wisconsin Public Service Corp Refg Ser 1993 
              A ..............................................................  6.90     02/01/13      10,991,400 
- ------------                                                                                       -------------- 
 74,750                                                                                                79,990,903 
- ------------                                                                                       -------------- 
             Mortgage Revenue-Multi-Family (2.1%) 
  7,000      Michigan Housing Development Authority, Rental Ser A (Bifurcated 
              FSA) ...........................................................  6.50     04/01/23       7,253,050 
  9,000      New Jersey Housing & Mortgage Finance Agency, 1995 Ser A 
              (AMBAC) ........................................................  6.05     11/01/20       9,179,190 
             New York City Housing Developement Corporation, New York, 
  4,514       Ruppert Proj-FHA Ins Sec 223F ..................................  6.50     11/15/18       4,637,092 
  4,371       Stevenson Commons Proj-FHA Ins Sec 223F ........................  6.50     05/15/18       4,463,777 
- ------------                                                                                       -------------- 
 24,885                                                                                                25,533,109 
- ------------                                                                                       -------------- 
             Mortgage Revenue-Single Family (6.7%) 
 10,000      Alaska Housing Finance Corporation, Governmental 1995 Ser A 
              (MBIA) .........................................................  5.875    12/01/24       9,965,400 
  2,440      California Housing Finance Agency, Home Cap Apprec 1983 Ser B  ..  0.00     08/01/15         381,372 
 12,100      Illinois Housing Development Authority, Residential 1991 Ser C 
              (AMT) ..........................................................  6.875    02/01/18      12,554,355 
  4,000      Missouri Housing Development Commission, Homeownership GNMA/FNMA 
              1996 Ser C (AMT) ...............................................  7.45     09/01/27       4,419,760 
  6,900      Nebraska Investment Finance Authority, GNMA-Backed 1990 Ser 
              (AMT) ..........................................................  7.631    09/10/30       7,305,306 
  4,010      North Carolina Housing Finance Agency, Ser Q (AMT) ..............  8.00     03/01/18       4,275,783 
  6,950      Ohio Housing Finance Agency, GNMA-Backed 1990 Ser A (AMT) .......  6.903    03/01/31       7,285,824 
 10,000      Pennsylvania Housing Finance Agency, Ser 1991-31 (AMT) ..........  7.00     10/01/23      10,541,100 
             Tennessee Housing Development Agency, 
  4,000       Mortgage Finance 1993 Ser A ....................................  5.90     07/01/18       4,031,880 
 11,000       Mortgage Finance 1993 Ser A ....................................  5.95     07/01/28      11,065,560 
  7,600      Wisconsin Housing & Economic Development Authority, Home 
              Ownership 1991 Ser (AMT) .......................................  7.097    10/25/22       7,965,864 
- ------------                                                                                       -------------- 
 79,000                                                                                                79,792,204 
- ------------                                                                                       -------------- 
             Public Facilities Revenue (2.3%) 
  5,000      Palm Beach County, Florida, Criminal Justice Ser 1990 (FGIC) ....  6.00     06/01/13       5,092,200 
 10,000      Michigan Building Authority, 1993 Refg Ser I (AMBAC) ............  5.30     10/01/16       9,494,500 
  6,000      Saint Louis Industrial Development Authority, Missouri, Kiel 
              Center Refg Ser 1992 (AMT) .....................................  7.75     12/01/13       6,423,540 
  5,000      Ohio Building Authority, Correctional 1985 Ser C BIGS ...........  9.75     10/01/05       6,619,750 
- ------------                                                                                       -------------- 
 26,000                                                                                                27,629,990 
- ------------                                                                                       -------------- 
             Resource Recovery Revenue (5.8%) 
             Connecticut Resources Recovery Authority, 
  9,000       American REF-FUEL Co of Southeastern Connecticut 1988 Ser A 
              (AMT) ..........................................................  8.00     11/15/15       9,720,540 
  4,950       Bridgeport RESCO Ser A .........................................  7.625    01/01/09       5,107,707 
  7,000      Savannah Resource Recovery Development Authority, Georgia, 
              Savannah Energy Systems Co Ser 1992 ............................  6.30     12/01/06       7,385,210 
 10,000      Northeast Maryland Waste Disposal Authority, Montgomery County 
              Ser 1993 A (AMT) ...............................................  6.30     07/01/16      10,197,500 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
$ 9,000      Mercer County Improvement Authority, New Jersey, Refg Ser A 1992 
              (AMT)(FGIC) ....................................................  6.70 %   04/01/13  $    9,009,990 
 10,000      Hempstead Industrial Development Agency, New York, 1985 American 
              REF-FUEL Co of Hempstead .......................................  7.40     12/01/10      10,250,000 
  6,000      New York State Environmental Facilities Corporation, Huntington 
              1989 Ser A (AMT) ...............................................  7.50     10/01/12       6,344,220 
  5,000      Onondaga County Resource Recovery Agency, New York, 1992 Ser 
              (AMT) ..........................................................  6.875    05/01/06       5,219,800 
  5,000      Fairfax County Economic Development Authority, Virginia, Ogden 
              Martin Systems of Fairfax Inc Ser 1988 A (AMT) .................  7.75     02/01/11       5,387,800 
- ------------                                                                                       -------------- 
 65,950                                                                                                68,622,767 
- ------------                                                                                       -------------- 
             Transportation Facilities Revenue (12.5%) 
  8,965      Mid-Bay Bridge Authority, Florida, Sr Lien Crossover Refg Ser 
              1993 A .........................................................  6.00     10/01/13       8,954,601 
             Atlanta, Georgia, 
  5,000       Airport Refg Ser 1996 (AMBAC)  .................................  6.00     01/01/07       5,393,800 
 10,000       Airport Ser 1990 (AMT) .........................................  6.25     01/01/21      10,281,300 
  8,100      Metropolitan Atlanta Rapid Transit Authority, Georgia, Sales Tax 
              Refg Ser K .....................................................  7.25     07/01/10       8,574,822 
  5,000      Hawaii, Airports Second Ser 1991 (AMT) ..........................  7.00     07/01/18       5,365,450 
             Kentucky Turnpike Authority, 
  9,000       Economic Development Road Refg Ser 1995 (AMBAC) ................  6.50     07/01/08      10,153,080 
 30,000       Resource Recovery Road Refg 1987 Ser A  ........................  5.00     07/01/08      29,232,300 
 11,000      New Jersey Highway Authority, Sr Parkway Refg 1992 Ser ..........  6.25     01/01/14      11,532,510 
  6,595      Albuquerque, New Mexico, Airport Refg Ser 1997 (AMT) (AMBAC) 
              (WI) ...........................................................  6.375    07/01/15       6,955,878 
             Ohio Turnpike Commission, 
  4,000       1994 Ser A  ....................................................  5.75     02/15/24       3,988,800 
 20,000       1996 Ser A (MBIA) ..............................................  5.50     02/15/26      19,656,600 
  5,000      Pennsylvania Turnpike Commission, Ser L of 1991 (MBIA) ..........  6.00     06/01/15       5,141,500 
 10,000      Puerto Rico Highway & Transportation Authority, Refg Ser X ......  5.50     07/01/15       9,931,200 
 10,000      Texas Turnpike Authority, Dallas North Tollway Refg Ser 1997 
              (FGIC) .........................................................  5.25     01/01/23       9,550,000 
  4,000      Virginia Transportation Board, US Route 58 Corridor Ser 1993 B ..  5.625    05/15/13       4,008,960 
- ------------                                                                                       -------------- 
146,660                                                                                               148,720,801 
- ------------                                                                                       -------------- 
             Water & Sewer Revenue (9.7%) 
 10,000      Birmingham Water Works & Sewer Board, Alabama, Ser 1994 .........  5.50     01/01/20       9,935,500 
 10,000      Phoenix Civic Improvement Corporation, Arizona, Jr Lien Water 
              Ser 1994 .......................................................  5.45     07/01/19       9,734,700 
 10,000      California Department of Water Resources, Central Valley Refg 
              Ser L  .........................................................  5.50     12/01/23       9,766,200 
 10,000      East Bay Municipal Utility District, California, Water Refg Ser 
              1993 (MBIA) ....................................................  5.00     06/01/21       9,131,900 
 10,000      Los Angeles, California, Wastewater Ser 1994-A (MBIA) ...........  5.875    06/01/24      10,198,600 
 10,000      Dade County, Florida, Water & Sewer Ser 1995 (FGIC) .............  5.50     10/01/25       9,814,900 
  5,000      Rockdale County Water & Sewerage Authority, Georgia, Ser 1996 
              (FSA) ..........................................................  5.00     07/01/22       4,659,400 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
             Massachusetts Water Resources Authority, 
 $ 10,000     Refg 1992 Ser B ................................................  5.50 %   11/01/15  $   9,747,500 
   10,000     1993 Ser C .....................................................  5.25     12/01/15      9,707,800 
   10,000     1996 Ser A (FGIC) ..............................................  5.50     11/01/21      9,826,400 
    4,000    Detroit, Michigan, Sewage Refg Ser 1993-A (FGIC) ................  5.70     07/01/13      4,040,240 
    8,500    New York City Municipal Water Finance Authority, New York, 1994 
              Ser B  .........................................................  5.30     06/15/06      8,592,055 
   10,000    Philadelphia, Pennsylvania, Water & Wastewater Ser 1993 (FSA) ...  5.50     06/15/15      9,773,200 
- ------------                                                                                       -------------- 
  117,500                                                                                            114,928,395 
- ------------                                                                                       -------------- 
             Other Revenue (2.4%) 
    3,500    Denver, Colorado, Excise Tax Ser 1985 A .........................  5.00     11/01/08      3,414,320 
             New York Local Government Assistance Corporation, 
    5,000     Ser 1993 C Refg ................................................  5.375    04/01/14      4,881,500 
   10,000     Ser 1994 A  ....................................................  5.50     04/01/17      9,987,000 
    5,000     Ser 1995 A  ....................................................  6.00     04/01/24      5,106,900 
    5,000    Houston, Texas, Sr Lien Hotel Occupancy Tax Refg Ser 1995 (FSA) .  5.50     07/01/11      5,011,000 
- ------------                                                                                       -------------- 
   28,500                                                                                             28,400,720 
- ------------                                                                                       -------------- 
             Refunded (10.4%) 
    5,000    Central Coast Water Authority, California, Ser 1992 (AMBAC) .....  6.60     10/01/02++    5,647,550 
    9,000    Los Angeles Convention & Exhibition Center Authority, 
              California, Ser 1985 COPs ......................................  9.00     12/01/05++   11,869,290 
    6,000    Connecticut Health & Educational Facilities Authority, Yale-New 
              Haven Hospital Ser F (MBIA) ....................................  7.10     07/01/00++    6,633,600 
    2,500    Mid-Bay Bridge Authority, Florida, Ser 1991 A (ETM) .............  6.875    10/01/22      2,854,200 
    9,790    Metropolitan Pier & Exposition Authority, Illinois, McCormick 
              Place Ser 1992 A ...............................................  6.50     06/15/03++   10,994,366 
    8,000    Massachusetts, 1994 Ser C (FGIC) ................................  6.75     11/01/04++    9,164,640 
   14,000    New York State Dormitory Authority, Suffolk County Judicial Ser 
              1986 (ETM) .....................................................  7.375    07/01/16     16,952,460 
   25,000    Intermountain Power Agency, Utah, Refg 1985 Ser H (GAINS) .......  0.00 +   07/01/03++   24,159,500 
    5,000    Salt Lake City, Utah, IHC Hospital Inc Ser of 1983 (ETM) ........  5.00     06/01/15      4,835,050 
   28,000    Fairfax County Industrial Development Authority, Virginia, 
              Fairfax Hospital System Inc/Inova Health Ser 1991 ..............  6.801    08/15/01++   30,990,680 
- ------------                                                                                       -------------- 
  112,290                                                                                            124,101,336 
- ------------                                                                                       -------------- 
1,132,855    TOTAL TAX-EXEMPT MUNICIPAL BONDS 
             (Identified Cost $1,051,723,235) .................................................... 1,125,060,539 
- ------------                                                                                       -------------- 
             SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (6.1%) 
    9,700    Dade County Health Facilities Authority, Florida, Miami 
              Childrens Hospital Ser 1990 (Demand 01/02/97)  .................  5.05 *   09/01/20      9,700,000 
   13,900    Hapeville Development Authority, Georgia, Hapeville Hotel Ltd 
              Ser 1985 (Demand 01/02/97) .....................................  5.00 *   11/01/15     13,900,000 
    8,700    University of Michigan, Hospital Ser 1995 A (Demand 01/02/97) ...  5.10 *   12/01/19      8,700,000 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
  $ 18,900   Missouri Health & Educational Facilities Authority, Washington 
              University Ser 1996 D (Demand 01/02/97) ........................  4.75*%   02/01/30     $18,900,000 
     9,000   North Central Texas Health Facilities Development Corporation, 
              University Medical Center Inc Ser 1987 .........................  7.75     04/01/97++     9,294,570 
    11,600   Kemmerer, Wyoming, Exxon Corp Ser 1984 (Demand 01/02/97) ........  5.10*    11/01/14      11,600,000 
- ------------                                                                                       -------------- 
    71,800   TOTAL SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS 
- ------------ 
             (Identified Cost $71,447,050) ........................................................    72,094,570 
                                                                                                   -------------- 
$1,204,655   TOTAL INVESTMENTS (Identified Cost $1,123,170,285) (a) ...................   100.6%    1,197,155,109 
============ 
             LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS ...........................   (0.6)        (7,121,119) 
                                                                                       ----------- -------------- 
             NET ASSETS ...............................................................   100.0%   $1,190,033,990 
                                                                                       =========== ============== 
</TABLE>

- ------------ 
AMT         Alternative Minimum Tax. 
BIGS        Bond Income Growth Security. 
COPs        Certificates of Participation. 
ETM         Escrowed to Maturity. 
GAINS       Growth and Income Security. 
WI          Security purchased on a when issued basis. 
+           Zero coupon; will convert to 10.00% on July 1, 2000. 
++          Prerefunded to call date shown. 
*           Current coupon of variable rate security. 
(a)         The aggregate cost for federal income tax purposes approximates 
            identified cost. The aggregate gross unrealized appreciation is 
            $77,142,347 and the aggregate gross unrealized depreciation is 
            $3,157,523, resulting in net unrealized appreciation of 
            $73,984,824. 

Bond Insurance: 
- --------------- 
AMBAC       AMBAC Indemnity Corporation. 
Connie Lee  Connie Lee Insurance Company. 
FGIC        Financial Guaranty Insurance Company. 
FSA         Financial Security Assurance Company. 
MBIA        Municipal Bond Investors Assurance Corporation. 


                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

Geographic Summary of Investments 
Based on Market Value as a Percent of Net Assets 
December 31, 1996 

<TABLE>
<CAPTION>
<S>             <C>
Alabama             1.7% 
Alaska              4.1 
Arizona             3.0 
Arkansas            0.3 
California          5.6 
Colorado            0.3 
Connecticut         2.0 
Florida             3.1 
Georgia             5.1 
Hawaii              0.4 
Illinois            2.0 
Indiana             0.8 
Kentucky            3.4 
Maryland            1.0% 
Massachusetts       6.6 
Michigan            2.5 
Minnesota           1.2 
Mississippi         1.4 
Missouri            3.3 
Nebraska            0.6 
Nevada              2.2 
New Hampshire       1.2 
New Jersey          2.7 
New Mexico          0.6 
New York           11.4 
North Carolina      1.6 
Ohio                3.5% 
Pennsylvania        3.0 
Puerto Rico         1.2 
South Carolina      1.3 
Tennessee           1.9 
Texas               6.8 
Utah                4.0 
Vermont             0.4 
Virginia            4.7 
Washington          3.1 
Wisconsin           1.6 
Wyoming             1.0 
                  -----
Total             100.6% 
                  =====
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS 

STATEMENTS OF ASSETS AND LIABILITIES 
December 31, 1996 

<TABLE>
<CAPTION>
<S>                                                                    <C>
ASSETS: 
Investments in securities, at value 
 (identified cost $1,123,170,285) ..................................... $1,197,155,109 
Cash ..................................................................        887,063 
Receivable for: 
  Interest ............................................................     17,424,216 
  Shares of beneficial interest sold ..................................        244,066 
Prepaid expenses and other assets .....................................         27,394 
                                                                        -------------- 
  TOTAL ASSETS ........................................................  1,215,737,848 
                                                                        -------------- 
LIABILITIES: 
Payable for: 
  Investments purchased ...............................................     20,777,892 
  Dividends and distributions .........................................      3,724,283 
  Shares of beneficial interest repurchased ...........................        596,522 
  Investment management fee ...........................................        452,931 
Accrued expenses ......................................................        152,230 
                                                                        -------------- 
  TOTAL LIABILITIES ...................................................     25,703,858 
                                                                        -------------- 
NET ASSETS: 
Paid-in-capital .......................................................  1,115,886,458 
Net unrealized appreciation ...........................................     73,984,824 
Accumulated undistributed net realized gain ...........................        162,708 
                                                                        -------------- 
  NET ASSETS .......................................................... $1,190,033,990 
                                                                        ============== 
NET ASSET VALUE PER SHARE, 
 101,083,561 shares outstanding (unlimited shares authorized of $.01 
 par value) ........................................................... $        11.77 
                                                                        ============== 
MAXIMUM OFFERING PRICE PER SHARE 
 (net asset value plus 4.17% of net asset value)* ..................... $        12.26 
                                                                        ============== 
</TABLE>

- ------------ 
*      On sales of $25,000 or more the offering price is reduced. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS, continued 

STATEMENT OF OPERATIONS 
For the year ended December 31, 1996 

<TABLE>
<CAPTION>
<S>                                     <C>
NET INVESTMENT INCOME: 
INTEREST INCOME ........................   $ 74,093,062 
                                         -------------- 
EXPENSES 
Investment management fee ..............      5,320,578 
Transfer agent fees and expenses  ......        387,764 
Shareholder reports and notices  .......         62,672 
Custodian fees .........................         52,615 
Professional fees ......................         52,404 
Registration fees ......................         46,458 
Trustees' fees and expenses ............         15,285 
Other ..................................         30,574 
                                         -------------- 
  TOTAL EXPENSES .......................      5,968,350 
  LESS: EXPENSE OFFSET  ................        (40,849) 
                                         -------------- 
  NET EXPENSES .........................      5,927,501 
                                         -------------- 
  NET INVESTMENT INCOME ................     68,165,561 
                                         -------------- 
NET REALIZED AND UNREALIZED GAIN 
 (LOSS): 
Net realized gain ......................      2,959,135 
Net change in unrealized appreciation  .    (29,830,436) 
                                         -------------- 
  NET LOSS .............................    (26,871,301) 
                                         -------------- 
NET INCREASE ...........................   $ 41,294,260 
                                         ============== 
</TABLE> 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS, continued 

STATEMENT OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                          FOR THE YEAR        FOR THE YEAR 
                                                              ENDED              ENDED 
                                                        DECEMBER 31, 1996  DECEMBER 31, 1995 
- ----------------------------------------------------------------------------------------------
<S>                                                        <C>               <C>
INCREASE (DECREASE) IN NET ASSETS: 
OPERATIONS: 
Net investment income .................................    $   68,165,561    $   76,135,601 
Net realized gain .....................................         2,959,135        17,721,238 
Net change in unrealized appreciation/depreciation  ...       (29,830,436)      117,785,387 
                                                           --------------    -------------- 
  NET INCREASE.........................................        41,294,260       211,642,226 
                                                           --------------    -------------- 
DIVIDENDS AND DISTRIBUTIONS FROM: 
Net investment income .................................       (68,543,874)      (75,983,289) 
Net realized gain .....................................        (8,374,759)      (12,426,304) 
                                                           --------------    -------------- 
  TOTAL ...............................................       (76,918,633)      (88,409,593) 
                                                           --------------    -------------- 
Net decrease from transactions in shares of beneficial 
 interest .............................................       (99,650,138)      (93,207,593) 
                                                           --------------    -------------- 
  NET INCREASE (DECREASE) .............................      (135,274,511)       30,025,040 
NET ASSETS: 
Beginning of period ...................................     1,325,308,501     1,295,283,461 
                                                           --------------    -------------- 
  END OF PERIOD 
  (Including undistributed net investment income of 
  $0 and $378,313, respectively) ......................    $1,190,033,990    $1,325,308,501 
                                                           ==============    ==============
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS December 31, 1996 

1. ORGANIZATION AND ACCOUNTING POLICIES 

Dean Witter Tax-Exempt Securities Trust (the "Fund") is registered under the 
Investment Company Act of 1940, as amended, as a diversified, open-end 
management investment company. The Fund's investment objective is to provide 
a high level of current income which is exempt from federal income tax, 
consistent with the preservation of capital. The Fund was incorporated in 
Maryland in 1979, commenced operations on March 27, 1980 and reorganized as a 
Massachusetts business trust on April 30, 1987. 

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 -- Portfolio securities are valued for the Fund 
by an outside independent pricing service approved by the Trustees. The 
pricing service has informed the Fund that in valuing the Fund's portfolio 
securities, it uses both a computerized matrix of tax-exempt securities and 
evaluations by its staff, in each case based on information concerning market 
transactions and quotations from dealers which reflect the bid side of the 
market each day. The Fund's portfolio securities are thus valued by reference 
to a combination of transactions and quotations for the same or other 
securities believed to be comparable in quality, coupon, maturity, type of 
issue, call provisions, trading characteristics and other features deemed to 
be relevant. 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 by the identified cost 
method. The Fund amortizes premiums and accretes discounts over the life of 
the respective securities. Interest income is accrued daily. 

C. 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 and nontaxable income to its 
shareholders. Accordingly, no federal income tax provision is required. 

D. 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 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS December 31, 1996, continued 

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 
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 with Dean Witter InterCapital 
Inc. (the "Investment Manager"), the Fund pays the Investment Manager a 
management fee, accrued daily and payable monthly, by applying the following 
annual rates to the Fund's net assets determined as of the close of each 
business day: 0.50% to the portion of daily net assets not exceeding $500 
million; 0.425% to the portion of daily net assets exceeding $500 million but 
not exceeding $750 million; 0.375% to the portion of daily net assets 
exceeding $750 million but not exceeding $1 billion; 0.35% to the portion of 
daily net assets exceeding $1 billion but not exceeding $1.25 billion; and 
0.325% to the portion of daily net assets exceeding $1.25 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. 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 December 31, 1996 
aggregated $215,642,138 and $383,666,566, respectively. 

Dean Witter Trust Company, an affiliate of the Investment Manager, is the 
Fund's transfer agent. At December 31, 1996, the Fund had transfer agent fees 
and expenses payable of approximately $52,400. 

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 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS December 31, 1996, continued 

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 December 31, 1996 included in Trustees' fees and expenses 
in the Statement of Operations amounted to $837. At December 31, 1996, the 
Fund had an accrued pension liability of $48,696 which is included in accrued 
expenses in the Statement of Assets and Liabilities. 

Shares of the Fund are distributed by Dean Witter Distributors Inc. (the 
"Distributor"), an affiliate of the Investment Manager. The Distributor has 
informed the Fund that for the year ended December 31, 1996, it received 
approximately $1,050,000 in commissions from the sale of the Fund's shares. 
Such commissions are not an expense of the Fund; they are deducted from the 
proceeds of the shares. 

4. SHARES OF BENEFICIAL INTEREST 

Transactions in shares of beneficial interest were as follows: 

<TABLE>
<CAPTION>
                                                      FOR THE YEAR                   FOR THE YEAR 
                                                         ENDED                          ENDED 
                                                   DECEMBER 31, 1996              DECEMBER 31, 1995 
                                            ------------------------------ ------------------------------ 
                                                 SHARES         AMOUNT          SHARES         AMOUNT 
                                            -------------- --------------- -------------- --------------- 
<S>                                         <C>            <C>             <C>            <C>
Sold                                            3,179,464    $  37,259,996     3,469,058    $  40,446,608 
Reinvestment of dividends and distributions     3,684,669       43,078,883     4,260,271       50,182,467 
                                            -------------- --------------- -------------- --------------- 
                                                6,864,133       80,338,879     7,729,329       90,629,075 
Repurchased                                   (15,389,992)    (179,989,017)  (15,722,604)    (183,836,668) 
                                            -------------- --------------- -------------- --------------- 
Net decrease                                   (8,525,859)   $ (99,650,138)   (7,993,275)   $ (93,207,593) 
                                            ============== =============== ============== =============== 
</TABLE>

5. FEDERAL INCOME TAX STATUS 

Capital losses incurred after October 31 ("post-October" losses) within the 
taxable year are deemed to arise on the first business day of the Fund's next 
taxable year. The Fund incurred and will elect to defer net capital losses of 
approximately $146,000 during fiscal 1996. 

As of December 31, 1996, the Fund had temporary book/tax differences 
primarily attributable to post-October losses. 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL HIGHLIGHTS 

Selected ratios and per share data for a share of beneficial interest 
outstanding throughout each period: 

<TABLE>
<CAPTION>
                                  FOR THE YEAR ENDED DECEMBER 31, 
                           --------------------------------------------- 
                             1996     1995     1994      1993     1992 
- ------------------------------------------------------------------------ 
<S>                        <C>      <C>      <C>       <C>      <C>
PER SHARE 
 OPERATING PERFORMANCE: 
Net asset value, 
 beginning of period ......  $12.09   $11.01   $12.41    $11.88   $11.65 
                           -------- -------- --------- -------- -------- 
Net investment income  ....    0.65     0.67     0.70      0.77     0.79 
Net realized and 
 unrealized gain (loss)  ..   (0.24)    1.19    (1.37)     0.54     0.23 
                           -------- -------- --------- -------- -------- 
Total from investment 
  operations ..............    0.41     1.86    (0.67)     1.31     1.02 
                           -------- -------- --------- -------- -------- 
Less dividends and 
 distributions from: 
 Net investment income  ...   (0.65)   (0.67)   (0.70)    (0.77)   (0.79) 
 Net realized gain ........   (0.08)   (0.11)   (0.03)    (0.01)    -- 
                           -------- -------- --------- -------- -------- 
Total dividends and 
  distributions ...........   (0.73)   (0.78)   (0.73)    (0.78)   (0.79) 
                           -------- -------- --------- -------- -------- 
Net asset value, 
 end of period ............  $11.77   $12.09   $11.01    $12.41   $11.88 
                           ======== ======== ========= ======== ======== 
TOTAL INVESTMENT RETURN+       3.61%   17.37%   (5.55)%   11.23%    9.09% 
RATIOS TO 
 AVERAGE NET ASSETS: 
Expenses ..................    0.48%    0.48%    0.47%     0.47%    0.49% 
Net investment income .....    5.52%    5.76%    6.02%     6.23%    6.74% 
SUPPLEMENTAL DATA: 
Net assets, end of period, 
  in millions .............  $1,190   $1,325   $1,295    $1,582   $1,323 
Portfolio turnover rate  ..      18%      21%      16%       13%       4% 
</TABLE>

                    (RESTUBBED TABLE CONTINUED FROM ABOVE) 

<TABLE>
<CAPTION>
                              1991     1990     1989     1988     1987 
- ------------------------------------------------------------------------ 
<S>                        <C>      <C>      <C>      <C>      <C>
PER SHARE 
 OPERATING PERFORMANCE: 
Net asset value, 
 beginning of period ......  $11.09   $11.28   $10.96   $10.45   $11.50 
                           -------- -------- -------- -------- --------- 
Net investment income  ....    0.80     0.80     0.81     0.81     0.80 
Net realized and 
 unrealized gain (loss)  ..    0.56    (0.18)    0.32     0.51    (0.97) 
                           -------- -------- -------- -------- --------- 
Total from investment 
  operations ..............    1.36     0.62     1.13     1.32    (0.17) 
                           -------- -------- -------- -------- --------- 
Less dividends and 
 distributions from: 
 Net investment income  ...   (0.80)   (0.81)   (0.81)   (0.81)   (0.83) 
 Net realized gain ........    --       --       --       --      (0.05) 
                           -------- -------- -------- -------- --------- 
Total dividends and 
  distributions ...........   (0.80)   (0.81)   (0.81)   (0.81)   (0.88) 
                           -------- -------- -------- -------- --------- 
Net asset value, 
 end of period ............  $11.65   $11.09   $11.28   $10.96   $10.45 
                           ======== ======== ======== ======== ========= 
TOTAL INVESTMENT RETURN+      12.71%    5.86%   10.61%   13.02%   (1.44)% 
RATIOS TO 
 AVERAGE NET ASSETS: 
Expenses ..................    0.51%    0.51%    0.51%    0.54%    0.52% 
Net investment income .....    7.05%    7.25%    7.31%    7.51%    7.42% 
SUPPLEMENTAL DATA: 
Net assets, end of period, 
  in millions .............  $1,145   $1,010   $1,033    $908      $896 
Portfolio turnover rate  ..      10%      19%      13%      17%      37% 
</TABLE>

- ------------ 
+ Does not reflect the deduction of sales load. Calculated based on the net 
asset value as of the last business day of the period. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
REPORT OF INDEPENDENT ACCOUNTANTS 

TO THE SHAREHOLDERS AND TRUSTEES 
OF DEAN WITTER TAX-EXEMPT SECURITIES TRUST 

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 Dean Witter 
Tax-Exempt Securities Trust (the "Fund") at December 31, 1996, 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 ten years in the period then ended, 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 
December 31, 1996 by correspondence with the custodian and brokers, provide a 
reasonable basis for the opinion expressed above. 

PRICE WATERHOUSE LLP 
1177 Avenue of the Americas 
New York, New York 10036 
February 10, 1997 

                     1996 FEDERAL TAX NOTICE (unaudited) 
- -------------------------------------------------------------------------------
       During the year ended December 31, 1996, the Fund paid to the 
       shareholders $0.65 per share from net investment income. All of the 
       Fund's dividends from net investment income were exempt interest 
       dividends, excludable from gross income for Federal income tax 
       purposes. For the year ended December 31, 1996, the Fund paid to 
       shareholders $0.08 per share from long-term capital gains. 
- -------------------------------------------------------------------------------

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST               Two World Trade Center, 
LETTER TO THE SHAREHOLDERS June 30, 1997              New York, New York 10048 

DEAR SHAREHOLDER: 

We are pleased to present the semiannual report on the operations of Dean 
Witter Tax-Exempt Securities Trust for the six-month period ended June 30, 
1997. 

A consumer-led acceleration in economic activity in late 1996 carried into 
the first quarter of 1997. This contributed to a rise in interest rates 
between December 1996 and April 1997. On March 25, 1997, the Federal Reserve 
Board raised the federal-funds rate 25 basis points to 5.50 percent in a 
preemptive move against a possible increase in the rate of inflation. The 
bond market recognized that additional rate hikes by the central bank were 
possible, but began to rally when short-term interest rates remained 
unchanged in May. 

MUNICIPAL MARKET CONDITIONS 

Municipal yields followed the trend of U.S. Treasury yields, but with less 
volatility. Long-term insured revenue bond yields rose from 5.45 percent at 
the end of November 1996 to a high of 5.85 percent in mid April 1997 before 
declining to 5.50 percent in June. 


[THE NARRATIVE AND/OR TABULAR INFORMATION BELOW IS A FAIR AND ACCURATE
DESCRIPTION OF GRAPHIC OR IMAGE MATERIAL OMITTED FOR THE PURPOSE OF EDGAR
FILING.]

                           BOND YIELDS 1994-1997

<TABLE>
<CAPTION>
                                                            INSURED MUNICPAL
                  30-YEAR               30-YEAR               REVENUE AS A
              INSURED MUNICPAL        U.S TREASURY            PERCENTAGE OF
                REVENUE YIELDS           YIELDS           U.S. TREASURY YIELDS
<S>               <C>                   <C>                     <C>
Dec '93           5.45                  6.35                    0.8586
                  5.29                  6.24                    0.8481
                  5.64                  6.66                    0.8468
                  6.19                  7.09                    0.8728
                  6.24                  7.31                    0.8540
                  6.23                  7.43                    0.8387
Jun '94           6.31                  7.61                    0.8293
                  6.15                  7.40                    0.8314
                  6.17                  7.45                    0.8280
                  6.42                  7.82                    0.8212
                  6.66                  7.97                    0.8356
                  6.99                  8.00                    0.8738
Dec '94           6.65                  7.88                    0.8438
                  6.42                  7.70                    0.8340
                  6.12                  7.44                    0.8222
                  6.07                  7.43                    0.8167
                  6.05                  7.34                    0.8245
                  5.84                  6.65                    0.8784
Jun '95           6.00                  6.62                    0.9066
                  5.99                  6.85                    0.8750
                  5.98                  6.65                    0.8997
                  5.97                  6.50                    0.9184
                  5.79                  6.33                    0.9150
                  5.61                  6.13                    0.9151
Dec '95           5.49                  5.95                    0.9230
                  5.42                  6.03                    0.8989
                  5.55                  6.47                    0.8577
                  5.89                  6.67                    0.8835
                  5.94                  6.91                    0.8601
                  5.99                  6.99                    0.8571
Jun '96           5.86                  6.87                    0.8529
                  5.77                  6.97                    0.8278
                  5.82                  7.12                    0.8176
                  5.71                  6.92                    0.8248
                  5.60                  6.64                    0.8431
                  5.45                  6.35                    0.8583
Dec '96           5.56                  6.64                    0.8372
                  5.63                  6.79                    0.8293
                  5.53                  6.80                    0.8129
                  5.83                  7.10                    0.8216
                  5.74                  6.96                    0.8251
                  5.58                  6.91                    0.8081
Jun '97           5.49                  6.78                    0.8092
</TABLE>                       
Source: Bloomberg L.P.

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST  
LETTER TO THE SHAREHOLDERS June 30, 1997, continued


[THE NARRATIVE AND/OR TABULAR INFORMATION BELOW IS A FAIR AND ACCURATE
DESCRIPTION OF GRAPHIC OR IMAGE MATERIAL OMITTED FOR THE PURPOSE OF EDGAR
FILING.]


LARGEST SECTORS AS OF JUNE 30, 1997
(% OF NET ASSETS)

GENERAL OBLICATION      13%
TRANSPORTATION          13%
REFUNDED	        12%
ELECTRIC                11%
SHORT-TERM               8%
WATER & SEWER            8%
HOSPITAL                 7%
ALL OTHERS		19%
MORTGAGE                 9%

PORTFOLIO STRUCTURE IS SUBJECT TO CHANGE.



CREDIT RATINGS AS OF JUNE 30, 1997
(% OF TOTAL LONG-TERM PORTFOLIO)

Aaa or AAA              54%
Aa or AA                19%
A or A                  14%
Baa or BBB               8%
Ba or BB                 2%
NR                       3%

AS MEASURED BY MOODY'S INVESTORS SERVICE INC. OR STANDARD & POOR'S CORP.

PORTFOLIO STRUCTURE IS SUBJECT TO CHANGE.







CALL STRUCTURE AS OF JUNE 30, 1997                    WEIGHTED AVERAGE
(% OF TOTAL LONG-TERM PORTFOLIO)                      CALL PROTECTION: 7 YEARS

1997               4.7%
1998               4.1%
1999               3.9%
2000               4.4%
2001               9.2%
2002              10.4%
2003              14.8%
2004               5.9%
2005              10.2%
2006               9.7%
2007+             22.7%


<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
LETTER TO THE SHAREHOLDERS June 30, 1997, continued 


The ratio of 30-year insured revenue bond yields to 30-year U.S. Treasury 
yields declined from 86 percent at the end of November 1996 to 81 percent in 
June 1997. A declining ratio means that municipals have outperformed 
Treasuries, but have become relatively less attractive. The annual range of 
the ratio has averaged between 80 percent and 92 percent over the past three 
years. 

Relative to last year, new-issue municipal volume was ahead only two percent 
for the first six months of 1997. Estimated underwriting volume of $180 
billion for the full year is expected to exceed bond maturities and 
redemptions of $130 billion. 

PERFORMANCE 

Dean Witter Tax-Exempt Securities Trust's total return for the six-month 
period ended June 30, 1997 was 2.79 percent. The Fund's net asset value 
increased slightly from $11.77 to $11.78 per share. Tax-free dividends 
totaling $0.32 per share and taxable capital gains distributions of $0.004 
per share were paid during the period. Tax free dividends continued to be the 
major component of total return. The Fund's net assets exceeded $1.1 billion. 

PORTFOLIO STRUCTURE 

The Fund's cash and short-term investment position during the first half of 
1997 increased from 6 percent to 8 percent of net assets. Refunded bonds 
added another 12 percent to the defensive position of the portfolio. 
Portfolio sales involved market-sensitive discount and current-coupon issues. 
The average maturity of the portfolio was 16 years. The distribution of bond 
call dates produced an average call protection of 7 years. 

Investments were diversified among 13 long-term sectors and 98 credits. The 
portfolio has consistently maintained high quality, with over 70 percent of 
its long-term holdings rated double "A" or better. Holdings in the electric 
revenue sector reflect the portfolio's ability to respond to changing credit 
conditions. With municipal electric utilities facing the increasingly 
competitive pressures of deregulation, approximately 75 percent of the 
electric credits are enhanced with bond insurance. 

LOOKING AHEAD 

Since the election-year collapse of flat-tax proposals, municipal bonds have 
outperformed U.S. Treasury securities. Tax-free yields are currently somewhat 
less attractive in their historical relationship with Treasury yields. 
However, the long-term benefits of tax-exempt income remain intact and have 
fostered demand for municipal bonds. 

On June 30, 1997, the Fund's Board of Trustees approved a proposal to adopt a 
multiple class share structure. Through this arrangement the Fund will offer 
four classes of shares with various sales charges, ongoing fees and other 
features. Existing shares were designated Class D. This conversion occurred 
on July 28, 1997. A revised prospectus, which includes complete details 
regarding this change, was mailed with your June 1997 statement. 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
LETTER TO THE SHAREHOLDERS June 30, 1997, continued 


We appreciate your ongoing support of Dean Witter Tax-Exempt Securities Trust 
and look forward to continuing to serve your investment needs. 

Very truly yours, 


/s/ Charles A. Fiumefreddo 

CHARLES A. FIUMEFREDDO 
Chairman of the Board 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
RESULTS OF SPECIAL MEETING (unaudited) 


On May 21, 1997, a special meeting of the Fund's shareholders was held for 
the purpose of voting on four separate matters, the results of which were as 
follows: 

(1) APPROVAL OF A NEW INVESTMENT MANAGEMENT AGREEMENT BETWEEN THE FUND AND 
    DEAN WITTER INTERCAPITAL INC. IN CONNECTION WITH THE MERGER OF MORGAN 
    STANLEY GROUP INC. WITH DEAN WITTER DISCOVER & CO.: 

<TABLE>
<CAPTION>
 <S>          <C>
 For ......  59,538,943 
 Against ..   1,406,853 
 Abstain ..   4,117,748 
</TABLE>

(2) ELECTION OF TRUSTEES: 

<TABLE>
<CAPTION>
<S>                      <C>
Michael Bozic 
For ...................  62,490,343 
Withheld ..............   2,573,201 

Charles A. Fiumefreddo 
For ...................  62,515,027 
Withheld ..............   2,548,517 

Edwin J. Garn 
For ...................  62,461,015 
Withheld ..............   2,602,529 

John R. Haire 
For ...................  62,438,859 
Withheld ..............   2,624,685 

Wayne E. Hedien 
For ...................  62,529,775 
Withheld ..............   2,533,769 

Dr. Manuel H. Johnson 
For ...................  62,567,181 
Withheld ..............   2,496,363 

Michael E. Nugent 
For ...................  62,561,434 
Withheld ..............   2,502,110 

Philip J. Purcell 
For ...................  62,565,915 
Withheld ..............   2,497,629 

John L. Schroeder 
For ...................  62,480,562 
Withheld ..............   2,582,982 
</TABLE>

(3) APPROVAL OF A NEW INVESTMENT POLICY WITH RESPECT TO INVESTMENTS IN 
    CERTAIN OTHER INVESTMENT COMPANIES: 

<TABLE>
<CAPTION>
  <S>         <C>
  For .....  57,095,092 
  Against .   2,662,961 
  Abstain .   5,305,491 
</TABLE>

(4) RATIFICATION OF PRICE WATERHOUSE LLP AS INDEPENDENT ACCOUNTANTS: 

<TABLE>
<CAPTION>
  <S>         <C>
  For .....  61,658,268 
  Against .     529,660 
  Abstain .   2,875,616 
</TABLE>

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS June 30, 1997 (unaudited) 


<TABLE>
<CAPTION>
  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE          VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
<S>          <C>                                                               <C>      <C>          <C>
             TAX-EXEMPT MUNICIPAL BONDS (90.5%) 
             General Obligation (13.2%) 
             North Slope Borough, Alaska, 
$ 5,000       Ser 1992 A Conv (MBIA) .........................................  5.90 %   06/30/03      $ 5,329,349 
 15,000       Ser 1994 B (FSA) ...............................................  0.00     06/30/05       10,018,050 
 18,500       Ser 1995 A (MBIA) ..............................................  0.00     06/30/06       11,696,070 
 10,000       Ser 1996 B (MBIA) ..............................................  0.00     06/30/07        5,950,000 
 10,000       Ser 1996 B (MBIA) ..............................................  0.00     06/30/06        6,322,200 
  4,000      Connecticut, College Savings 1989 Ser A .........................  0.00     07/01/08        2,271,400 
             Massachusetts,                                                                            
 20,000       Refg 1996 Ser A (AMBAC) ........................................  6.00     11/01/10       21,583,600 
  8,000       Refg 1993 Ser A ................................................  5.50     02/01/11        8,048,880 
  4,000      Clark County, Nevada, Transportation Ser 1992 A (AMBAC) .........  6.50     06/01/17        4,527,400 
             New York City, New York,                                                                  
 10,000       1990 Ser D .....................................................  6.00     08/01/07       10,122,200 
 10,000       1990 Ser D .....................................................  6.00     08/01/08       10,104,500 
 15,000      North Carolina, 1997 Ser A ......................................  5.20     03/01/16       14,857,500 
 10,000      Pennsylvania, First Ser 1995 (FGIC) .............................  5.50     05/01/12       10,129,600 
  7,000      Shelby County, Tennessee, Refg 1995 Ser A .......................  5.625    04/01/14        7,108,080 
 20,000      King County, Washington, Ltd Tax 1995 (MBIA) ....................  6.00     01/01/23       20,474,600 
- ------------                                                                                        -------------- 
166,500                                                                                                148,543,429 
- ------------                                                                                        -------------- 
             Educational Facilities Revenue (5.3%) 
 10,000      Indiana University, Student Fee Ser K (MBIA) ....................  5.875    08/01/20       10,101,700 
  7,000      Massachusetts Health & Educational Facilities Authority, Boston                            
              University  ....................................................                          
              Ser 1991 (MBIA) ................................................  6.66     10/01/31        7,527,170 
 15,000      New Hampshire Higher Educational & Health Facilities Authority,                            
              Dartmouth College Ser 1993 .....................................  5.375    06/01/23       14,343,300 
  2,000      New Jersey Development Authority, The Seeing Eye Inc 1991 .......  7.30     04/01/11        2,112,260 
             New York State Dormitory Authority,                                                        
  5,000       State University Ser 1989 B ....................................  0.00     05/15/02        3,964,000 
 20,000       State University Ser 1990 B ....................................  7.00     05/15/16       21,348,800 
- ------------                                                                                        -------------- 
 59,000                                                                                                 59,397,230 
- ------------                                                                                        -------------- 
             Electric Revenue (10.9%) 
 25,000      Salt River Project Agricultural Improvement & Power District, 
              Arizona, Refg 1993 Ser C (Secondary MBIA) ......................  5.50     01/01/10       25,963,000 
 10,000      Sacramento Municipal Utility District, California, Refg 1994 Ser                          
              L (MBIA) .......................................................  5.75     01/01/15       10,181,500 
 10,000      Municipal Electric Authority of Georgia, Fifth Crossover Ser                              
              (Secondary MBIA) ...............................................  6.50     01/01/17       11,303,400 
  5,000      New York State Power Authority, General Purpose Ser CC ..........  5.25     01/01/18        4,770,600 
 15,000      Puerto Rico Electric Power Authority, Power Ser O ...............  0.00     07/01/17        4,902,150 
 15,000      South Carolina Public Service Authority, 1995 Refg Ser A                                  
              (AMBAC) ........................................................  6.25     01/01/22       15,900,750 
                                                                                                       
                      SEE NOTES TO FINANCIAL STATEMENTS                                          

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS June 30, 1997 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE          VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
$24,000      San Antonio, Texas, Electric & Gas Refg Ser 1994 C ..............  4.70 %   02/01/06     $ 23,322,480 
 10,000      Intermountain Power Agency, Utah, Refg 1997 Ser B (MBIA)  .......  5.75     07/01/19       10,000,000 
 15,000      Washington Public Power Supply System, Proj #2 Refg Ser 1994 A 
              (Secondary MBIA) ...............................................  6.00     07/01/07       16,120,500 
- ------------                                                                                        -------------- 
129,000                                                                                                122,464,380 
- ------------                                                                                        -------------- 
             Hospital Revenue (6.5%) 
 10,000      Birmingham-Carraway Special Care Facilities Financing 
              Authority, Alabama, Carraway Methodist Health 
              Ser 1995 A (Connie Lee) ........................................  6.25     08/15/09       10,887,900 
  3,000      Baxter County, Arkansas, Baxter County Regional Hospital Inc                              
              Impr & Refg Ser 1992 ...........................................  7.50     09/01/21        3,222,750 
  1,500      Massachusetts Health & Educational Facilities Authority, Malden                           
              Hospital - FHA Ins Mtge Ser A ..................................  5.00     08/01/16        1,366,380 
             Rochester, Minnesota,                                                                     
  5,000       Mayo Foundation/Medical Center Ser 1992 I ......................  5.75     11/15/21        5,008,550 
  3,700       Mayo Foundation/Medical Center Ser 1992 F ......................  6.25     11/15/21        3,902,760 
 10,000      Missouri Health & Educational Facilities Authority,                                       
              Barnes-Jewish Inc/Christian Health Services Ser 1993 A .........  5.25     05/15/14        9,802,100 
  6,000      New York State Medical Care Facilities Finance Agency,                                    
              Presbyterian Hospital-FHA Ins Mtge 1984 Ser A Refg  ............  5.25     08/15/14        5,744,760 
 10,000      Charlotte-Mecklenburg County Hospital Authority, North Carolina,                          
              Ser 1992 .......................................................  6.00     01/01/22       10,172,000 
  5,000      University of North Carolina, Hospitals at Chapel Hill Ser 1996 .  5.00     02/15/29        4,530,000 
  4,000      Cuyahoga County, Ohio, The Cleveland Clinic Foundation Refg Ser                           
              1988 A .........................................................  8.00     12/01/15        4,115,200 
  5,000      North Central Texas Health Facilities Development Corporation,                            
              University Medical Center Inc Ser 1997 (FSA) ...................  5.45     04/01/15        4,920,250 
 10,000      Fredericksburg Industrial Development Authority, Virginia,                                
              Medicorp Health Refg Ser 1996 (AMBAC) ..........................  5.25     06/15/16        9,605,400 
- ------------                                                                                        -------------- 
 73,200                                                                                                 73,278,050 
- ------------                                                                                        -------------- 
             Industrial Development/Pollution Control Revenue (6.3%) 
  1,450      Maryland Industrial Development Financing Authority, Medical 
              Waste Assocs LP 1989 Ser (AMT) .................................  8.75     11/15/10        1,465,240 
 17,000      Claiborne County, Mississippi, Middle South Energy Inc Ser C ....  9.875    12/01/14       18,504,500 
 10,000      Clark County, Nevada, Nevada Power Co Ser 1992 A (AMT) (FGIC) ...  6.70     06/01/22       10,766,900 
  5,000      Washoe County, Nevada, Sierra Pacific Power Co Ser 1987 (AMBAC) .  6.30     12/01/14        5,381,600 
  5,000      Alliance Airport Authority, Texas, AMR Corp Ser 1990 (AMT) ......  7.50     12/01/29        5,393,550 
 10,000      Dallas-Fort Worth International Airport Facility Improvement                              
              Corporation, Texas, American Airlines Inc Ser 1995 .............  6.00     11/01/14       10,089,500 
  7,000      Matagorda County Navigation District #1, Texas, Central Power &                           
              Light Co Collateralized Ser 1984 A .............................  7.50     12/15/14        7,662,620 
 10,000      Weston, Wisconsin, Wisconsin Public Service Corp Refg Ser 1993                            
              A ..............................................................  6.90     02/01/13       11,047,900 
- ------------                                                                                        -------------- 
 65,450                                                                                                 70,311,810 
- ------------                                                                                        -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS June 30, 1997 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE          VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
             Mortgage Revenue-Multi-Family (2.3%) 
$ 7,000      Michigan Housing Development Authority, Rental Ser A (Bifurcated 
              FSA) ...........................................................  6.50 %   04/01/23      $ 7,265,020 
  9,000      New Jersey Housing & Mortgage Finance Agency, 1995 Ser A 
              (AMBAC) ........................................................  6.05     11/01/20        9,199,890 
             New York City Housing Development Corporation, New York,                                   
  4,476       Ruppert Proj-FHA Ins Sec 223F ..................................  6.50     11/15/18        4,634,438 
  4,333       Stevenson Commons Proj-FHA Ins Sec 223F  .......................  6.50     05/15/18        4,459,101 
- ------------                                                                                        -------------- 
 24,809                                                                                                 25,558,449 
- ------------                                                                                        -------------- 
             Mortgage Revenue-Single Family (6.5%) 
  5,000      Alaska Housing Finance Corporation, Governmental 1995 Ser A 
              (MBIA) .........................................................  5.875    12/01/24        4,996,349 
  2,440      California Housing Finance Agency, Home Cap Apprec 1983 Ser B ...  0.00     08/01/15          377,444 
 12,100      Illinois Housing Development Authority, Residential 1991 Ser C                             
              (AMT) ..........................................................  6.875    02/01/18       12,594,406 
  3,975      Missouri Housing Development Commission, Homeownership GNMA-FNMA                           
              1996 Ser C (AMT)  ..............................................  7.45     09/01/27        4,395,873 
  6,000      Nebraska Investment Finance Authority, GNMA-Backed 1990 Ser                                
              (AMT) ..........................................................  7.631    09/10/30        6,341,880 
  4,010      North Carolina Housing Finance Agency, Ser Q (AMT) ..............  8.00     03/01/18        4,269,367 
  6,400      Ohio Housing Finance Agency, GNMA-Backed 1990 Ser A (AMT) .......  6.903    03/01/31        6,696,640 
 10,000      Pennsylvania Housing Finance Agency, Ser 1991-31 (AMT) ..........  7.00     10/01/23       10,481,400 
             Tennessee Housing Development Agency,                                                      
 11,000       Mortgage Finance 1993 Ser A ....................................  5.95     07/01/28       11,069,520 
  4,000       Mortgage Finance 1993 Ser A ....................................  5.90     07/01/18        4,025,320 
  6,800      Wisconsin Housing & Economic Development Authority, Home                                   
              Ownership 1991 Ser (AMT) .......................................  7.097    10/25/22        7,154,008 
- ------------                                                                                        -------------- 
 71,725                                                                                                 72,402,207 
- ------------                                                                                        -------------- 
             Public Facilities Revenue (2.0%) 
  5,000      Palm Beach County, Florida, Criminal Justice Ser 1990 (FGIC) ....  6.00     06/01/13        5,090,550 
  5,000      Michigan Building Authority, 1993 Refg Ser I (AMBAC) ............  5.30     10/01/16        4,801,400 
  6,000      Saint Louis Industrial Development Authority, Missouri, Kiel                               
              Center Refg Ser 1992 (AMT) .....................................  7.75     12/01/13        6,439,740 
  5,000      Ohio Building Authority, Correctional 1985 Ser C BIGS ...........  9.75     10/01/05        6,593,200 
- ------------                                                                                        -------------- 
 21,000                                                                                                 22,924,890 
- ------------                                                                                        -------------- 
             Resource Recovery Revenue (3.8%) 
             Connecticut Resources Recovery Authority, 
  9,000       American REF-FUEL Co of Southeastern Connecticut 1988 Ser A  ...  8.00     11/15/15        9,643,680 
  4,950       Bridgeport RESCO Ser A .........................................  7.625    01/01/09        5,113,895 
  7,000      Savannah Resource Recovery Development Authority, Georgia,                                 
              Savannah Energy Systems Co Ser 1992 ............................  6.30     12/01/06        7,397,390 
 10,000      Northeast Maryland Waste Disposal Authority, Montgomery County                             
              Ser 1993 A (AMT) ...............................................  6.30     07/01/16       10,284,300 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS June 30, 1997 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE          VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
$ 5,000      Onondaga County Resource Recovery Agency, New York, 1992 Ser 
              (AMT) ..........................................................  6.875%   05/01/06      $ 5,248,400 
  5,000      Fairfax County Economic Development Authority, Virginia, Ogden 
              Martin Systems of Fairfax Inc Ser 1998 A (AMT)  ................  7.75     02/01/11        5,344,600 
- ------------                                                                                        -------------- 
 40,950                                                                                                 43,032,265 
- ------------                                                                                        -------------- 
             Transportation Facilities Revenue (12.8%) 
  8,965      Mid-Bay Bridge Authority, Florida, Sr Lien Crossover Refg Ser 
              1993 A .........................................................  6.00     10/01/13        9,056,891 
             Atlanta, Georgia,                                                                         
  5,000       Airport Refg Ser 1996 (AMBAC) ..................................  6.00     01/01/07        5,409,900 
 10,000       Airport Ser 1990 (AMT) .........................................  6.25     01/01/21       10,337,600 
  8,100      Metropolitan Atlanta Rapid Transit Authority, Georgia, Sales Tax                          
              Refg Ser K .....................................................  7.25     07/01/10        8,486,451 
  5,000      Hawaii, Airports Second Ser 1991 (AMT) ..........................  7.00     07/01/18        5,361,600 
             Kentucky Turnpike Authority,                                                              
  9,000       Economic Development Road Refg Ser 1995 (AMBAC) ................  6.50     07/01/08       10,148,130 
 30,000       Resource Recovery Road 1987 Ser A ..............................  5.00     07/01/08       29,650,201 
 11,000      New Jersey Highway Authority, Sr Parkway Refg 1992 Ser ..........  6.25     01/01/14       11,696,850 
  6,595      Albuquerque, New Mexico, Airport Refg Ser 1997 (AMT) (AMBAC) ....  6.375    07/01/15        6,992,876 
 20,000      Ohio Turnpike Commission, 1996 Ser A (MBIA) .....................  5.50     02/15/26       19,715,000 
  5,000      Pennsylvania Turnpike Commission, Ser L of 1991 (MBIA) ..........  6.00     06/01/15        5,132,200 
 10,000      Puerto Rico Highway & Transportation Authority, Refg Ser X ......  5.50     07/01/15        9,921,000 
  8,000      Texas Turnpike Authority, Dallas North Tollway Refg Ser 1997                              
              (FGIC) .........................................................  5.25     01/01/23        7,632,640 
  4,000      Virginia Transportation Board, US Route 58 Corridor Ser 1993 B ..  5.625    05/15/13        4,013,600 
- ------------                                                                                        -------------- 
140,660                                                                                                143,554,939 
- ------------                                                                                        -------------- 
             Water & Sewer Revenue (8.2%)                                                              
 10,000      Birmingham Water Works & Sewer Board, Alabama, Ser 1994 .........  5.50     01/01/20        9,785,400 
 10,000      Phoenix Civic Improvement Corporation, Arizona, Jr Lien Water                             
              Ser 1994 .......................................................  5.45     07/01/19        9,911,400 
 10,000      California Department of Water Resources, Central Valley Refg                             
              Ser L ..........................................................  5.50     12/01/23        9,714,800 
 10,000      East Bay Municipal Utility District, California, Water Refg Ser                           
              1993 (MBIA) ....................................................  5.00     06/01/21        9,115,900 
 10,000      Los Angeles, California, Wastewater Ser 1994-A (MBIA) ...........  5.875    06/01/24       10,169,400 
             Massachusetts Water Resources Authority,                                                  
 10,000       Refg 1992 Ser B ................................................  5.50     11/01/15        9,818,100 
 10,000       1993 Ser C .....................................................  5.25     12/01/15        9,701,000 
 10,000       1996 Ser A (FGIC) ..............................................  5.50     11/01/21        9,802,100 
  4,000      Detroit, Michigan, Sewage Refg Ser 1993-A (FGIC) ................  5.70     07/01/13        4,068,320 
  5,000      New York City Municipal Water Finance Authority, New York, 1994                           
              Ser B ..........................................................  5.30     06/15/06        5,097,350 
  5,000      Philadelphia, Pennsylvania, Water & Wastewater Ser 1993 (FSA) ...  5.50     06/15/15        4,943,700 
- ------------                                                                                        -------------- 
 94,000                                                                                                 92,127,470 
- ------------                                                                                        -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS June 30, 1997 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE          VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
             Other Revenue (1.0%) 
     $3,500  Denver, Colorado, Excise Tax Ser 1985 A .........................  5.00 %   11/01/08       $3,449,180 
      5,000  New York Local Government Assistance Corporation, Ser 1994 A ....  5.50     04/01/17        5,011,500 
      3,000  Houston, Texas, Sr Lien Hotel Occupancy Tax Refg Ser 1995 (FSA) .  5.50     07/01/11        3,016,920 
- ------------                                                                                        -------------- 
     11,500                                                                                             11,477,600 
- ------------                                                                                        -------------- 
             Refunded (11.7%) 
      5,000  Central Coast Water Authority, California, Ser 1992 (AMBAC) .....  6.60     10/01/02++      5,615,150 
      9,000  Los Angeles Convention and Exhibition Center Authority, 
              California, Ser 1985 COPs ......................................  9.00     12/01/05++     11,782,170 
      6,000  Connecticut Health & Educational Facilities Authority, Yale-New 
              Haven Hospital Ser F (MBIA) ....................................  7.10     07/01/00++      6,570,600 
      2,500  Mid-Bay Bridge Authority, Florida, Ser 1991 A (ETM) .............  6.875    10/01/22        2,906,400 
      9,790  Metropolitan Pier & Exposition Authority, Illinois, McCormick 
              Place Ser 1992 A ...............................................  6.50     06/15/03++     10,926,032 
      8,000  Massachusetts, 1994 Ser C (FGIC) ................................  6.75     11/01/04++      9,090,640 
     14,000  New York State Dormitory Authority, Suffolk County Judicial Ser 
              1986 (ETM) .....................................................  7.375    07/01/16       16,802,660 
      6,000  New York State Environmental Facilities Corporation, Huntington 
              1989 Ser A (AMT) ...............................................  7.50     10/01/99++      6,446,280 
     25,000  Intermountain Power Agency, Utah, Refg 1985 Ser H GAINS .........  0.00 +   07/01/03++     24,980,750 
      5,000  Salt Lake City, Utah, IHC Hospital Inc Ser 1983 (ETM) ...........  5.00     06/01/15        4,806,350 
     28,000  Fairfax County Industrial Development Authority, Virginia, 
              Fairfax Hospital System Inc/Inova Health Ser 1991 ..............  6.801    08/29/01++     30,983,680 
- ------------                                                                                        -------------- 
    118,290                                                                                            130,910,712 
- ------------                                                                                        -------------- 
  1,016,084  TOTAL TAX-EXEMPT MUNICIPAL BONDS (Identified Cost $944,228,954) ....................... 1,015,983,431 
- ------------                                                                                        -------------- 
             SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (7.8%) 
     17,800  Dade County Health Facilities Authority, Florida, Miami 
              Childrens Hospital Ser 1990 (Demand 07/01/97) ..................  4.20 *   09/01/20       17,800,000 
     11,000  East Baton Rouge Parish, Louisiana, Exxon Corp Ser 1989 
              (Demand 07/01/97) ..............................................  4.10 *   11/01/19       11,000,000 
     25,900  Missouri Health & Educational Facilities Authority, Washington 
              University Ser 1996 D (Demand 07/01/97) ........................  4.10 *   02/01/30       25,900,000 
     23,100  Harris County Health Facilities Development Corporation, Texas, 
              Methodist Hospital Ser 1994 (Demand 07/01/97) ..................  4.15 *   12/01/25       23,100,000 
      9,410  Washington Health Care Facilities Authority, Fred Hutchinson 
              Cancer Center Ser 1996 (Demand 07/01/97) .......................  4.10 *   01/01/23        9,410,000 
- ------------                                                                                        -------------- 
     87,210  TOTAL SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (Identified Cost $87,210,000) .......    87,210,000 
- ------------                                                                                        -------------- 
 $1,103,294  TOTAL INVESTMENTS (Identified Cost $1,031,438,954) (a) ...................    98.3%     1,103,193,431 
============ 
             CASH AND OTHER ASSETS IN EXCESS OF LIABILITIES ...........................    1.7          18,761,803 
                                                                                       ------------ -------------- 
             NET ASSETS ...............................................................   100.0%    $1,121,955,234 
                                                                                       ============ ============== 
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS June 30, 1997 (unaudited) continued 

- ------------ 
AMT          Alternative Minimum Tax. 
BIGS         Bond Income Growth Security. 
COPs         Certificates of Participation. 
ETM          Escrowed to Maturity. 
GAINS        Growth and Income Security. 
+            Zero coupon; will convert to 10.00% on July 1, 2000. 
++           Prerefunded to call date shown. 
++           Refunded to call date shown by forward delivery contract. 
*            Current coupon of variable rate demand obligation. 
(a)          The aggregate cost for federal income tax purposes approximates 
             identified cost. The aggregate gross unrealized appreciation is 
             $73,554,611 and the aggregate gross unrealized depreciation is 
             $1,800,134, resulting in a net unrealized appreciation of 
             $71,754,477. 

Bond Insurance: 
- --------------- 
AMBAC        AMBAC Indemnity Corporation. 
Connie Lee   Connie Lee Insurance Company. 
FGIC         Financial Guaranty Insurance Company. 
FSA          Financial Security Assurance Inc. 
MBIA         Municipal Bond Investors Assurance Corporation. 

                      Geographic Summary of Investments
               Based on Market Value as a Percent of Net Assets
                                June 30, 1997

<TABLE>
<CAPTION>
<S>               <C>
Alabama           1.8% 
Alaska            4.0 
Arizona           3.2 
Arkansas          0.3 
California        5.1 
Colorado          0.3 
Connecticut       2.1 
Florida           3.1 
Georgia           3.8 
Hawaii            0.5 
Illinois          2.1 
Indiana           0.9 
Kentucky          3.6 
Louisiana         1.0% 
Maryland          1.1 
Massachusetts     6.9 
Michigan          1.4 
Minnesota         0.8 
Mississippi       1.6 
Missouri          4.1 
Nebraska          0.6 
Nevada            1.8 
New Hampshire     1.3 
New Jersey        2.1 
New Mexico        0.6 
New York          9.2 
North Carolina    3.0% 
Ohio              3.3 
Pennsylvania      2.7 
Puerto Rico       1.3 
South Carolina    1.4 
Tennessee         2.0 
Texas             7.6 
Utah              3.5 
Virginia          4.5 
Washington        4.1 
Wisconsin         1.6 
                 ----
Total            98.3% 
                 ====
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS 


STATEMENTS OF ASSETS AND LIABILITIES 
June 30, 1997 (unaudited) 

<TABLE>
<CAPTION>
<S>                                                          <C>
ASSETS: 
Investments in securities, at value 
 (identified cost $1,031,438,954)............................ $1,103,193,431 
Cash.........................................................      3,121,503 
Receivable for: 
  Interest...................................................     15,966,001 
  Shares of beneficial interest sold.........................      1,024,875 
  Investment sold............................................         27,921 
Prepaid expenses and other assets............................         58,886 
                                                              -------------- 
  TOTAL ASSETS...............................................  1,123,392,617 
                                                              -------------- 
LIABILITIES: 
Payable for: 
  Dividends to shareholders..................................        665,159 
  Investment management fee..................................        419,847 
  Shares of beneficial interest repurchased..................        227,563 
Accrued expenses ............................................        124,814 
                                                              -------------- 
  TOTAL LIABILITIES..........................................      1,437,383 
                                                              -------------- 
NET ASSETS: 
Paid-in-capital..............................................  1,047,215,076 
Net unrealized appreciation..................................     71,754,477 
Accumulated undistributed net investment income  ............         16,350 
Accumulated undistributed net realized gain..................      2,969,331 
                                                              -------------- 
  NET ASSETS................................................. $1,121,955,234 
                                                              ============== 
NET ASSET VALUE PER SHARE, 
 95,208,514 shares outstanding (unlimited shares authorized 
 of $.01 par value)..........................................         $11.78 
                                                                      ====== 
MAXIMUM OFFERING PRICE PER SHARE 
 (net asset value plus 4.17% of net asset value)* ...........         $12.27 
                                                                      ====== 
</TABLE>

- ------------ 
* On sales of $25,000 or more the offering price is reduced. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS, continued 


STATEMENT OF OPERATIONS 
For the six months ended June 30, 1997 (unaudited) 

<TABLE>
<CAPTION>
<S>                                     <C>
NET INVESTMENT INCOME: 
INTEREST INCOME.........................  $33,641,367 
                                        ------------- 
EXPENSES 
Investment management fee...............    2,484,801 
Transfer agent fees and expenses .......      188,661 
Professional fees.......................       30,851 
Shareholder reports and notices.........       29,077 
Custodian fees..........................       23,260 
Registration fees.......................       21,662 
Trustees' fees and expenses.............        7,978 
Other...................................       17,116 
                                        ------------- 
  TOTAL EXPENSES .......................    2,803,406 
  LESS: EXPENSE OFFSET .................      (23,213) 
                                        ------------- 
  NET EXPENSES..........................    2,780,193 
                                        ------------- 
  NET INVESTMENT INCOME.................   30,861,174 
                                        ------------- 
NET REALIZED AND UNREALIZED GAIN 
 (LOSS): 
Net realized gain.......................    3,148,730 
Net change in unrealized appreciation ..   (2,230,347) 
                                        ------------- 
  NET GAIN..............................      918,383 
                                        ------------- 
NET INCREASE............................  $31,779,557 
                                        ============= 
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS, continued 


STATEMENT OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                         FOR THE SIX     FOR THE YEAR 
                                                         MONTHS ENDED        ENDED 
                                                        JUNE 30, 1997  DECEMBER 31, 1996 
- --------------------------------------------------------------------------------------- 
<S>                                                     <C>             <C>
                                                          (unaudited) 
INCREASE (DECREASE) IN NET ASSETS: 
OPERATIONS: 
Net investment income ................................. $   30,861,174  $   68,165,561 
Net realized gain......................................      3,148,730       2,959,135 
Net change in unrealized appreciation..................     (2,230,347)    (29,830,436) 
                                                        --------------  -------------- 
  NET INCREASE ........................................     31,779,557      41,294,260 
                                                        --------------  -------------- 
DIVIDENDS AND DISTRIBUTIONS FROM: 
Net investment income..................................    (30,844,824)    (68,543,874) 
Net realized gain......................................       (342,107)     (8,374,759) 
                                                        --------------  -------------- 
  TOTAL................................................    (31,186,931)    (76,918,633) 
                                                        --------------  -------------- 
Net decrease from transactions in shares of beneficial 
 interest..............................................    (68,671,382)    (99,650,138) 
                                                        --------------  -------------- 
  NET DECREASE.........................................    (68,078,756)   (135,274,511) 
NET ASSETS: 
Beginning of period....................................  1,190,033,990   1,325,308,501 
                                                        --------------  -------------- 
  END OF PERIOD 
  (Including undistributed net investment of income of 
  $16,350 and $0, respectively) ....................... $1,121,955,234  $1,190,033,990 
                                                        ==============  ==============

</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS June 30, 1997 (unaudited) 


1. ORGANIZATION AND ACCOUNTING POLICIES 

Dean Witter Tax-Exempt Securities Trust (the "Fund") is registered under the 
Investment Company Act of 1940, as amended, as a diversified, open-end 
management investment company. The Fund's investment objective is to provide 
a high level of current income which is exempt from federal income tax, 
consistent with the preservation of capital. The Fund was incorporated in 
Maryland in 1979, commenced operations on March 27, 1980 and reorganized as a 
Massachusetts business trust on April 30, 1987. 

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 -- Portfolio securities are valued for the Fund 
by an outside independent pricing service approved by the Trustees. The 
pricing service has informed the Fund that in valuing the Fund's portfolio 
securities, it uses both a computerized matrix of tax-exempt securities and 
evaluations by its staff, in each case based on information concerning market 
transactions and quotations from dealers which reflect the bid side of the 
market each day. The Fund's portfolio securities are thus valued by reference 
to a combination of transactions and quotations for the same or other 
securities believed to be comparable in quality, coupon, maturity, type of 
issue, call provisions, trading characteristics and other features deemed to 
be relevant. 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 by the identified cost 
method. The Fund amortizes premiums and accretes discounts over the life of 
the respective securities. Interest income is accrued daily. 

C. 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 and nontaxable income to its 
shareholders. Accordingly, no federal income tax provision is required. 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS June 30, 1997 (unaudited) continued 


D. 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 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 with Dean Witter InterCapital 
Inc. (the "Investment Manager"), the Fund pays the Investment Manager a 
management fee, accrued daily and payable monthly, by applying the following 
annual rates to the Fund's net assets determined as of the close of each 
business day: 0.50% to the portion of daily net assets not exceeding $500 
million; 0.425% to the portion of daily net assets exceeding $500 million but 
not exceeding $750 million; 0.375% to the portion of daily net assets 
exceeding $750 million but not exceeding $1 billion; 0.35% to the portion of 
daily net assets exceeding $1 billion but not exceeding $1.25 billion; and 
0.325% to the portion of daily net assets exceeding $1.25 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. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES 

The cost of purchases and proceeds from sales of portfolio securities, 
excluding short-term investments, for the six months ended June 30, 1997 
aggregated $53,278,800 and $175,094,891, respectively. 

Dean Witter Trust Company, an affiliate of the Investment Manager, is the 
Fund's transfer agent. At June 30, 1997, the Fund had transfer agent fees and 
expenses payable of approximately $44,000. 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS June 30, 1997 (unaudited) continued 


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 six 
months ended June 30, 1997 included in Trustees' fees and expenses in the 
Statement of Operations amounted to $1,208. At June 30, 1997, the Fund had an 
accrued pension liability of $47,549 which is included in accrued expenses in 
the Statement of Assets and Liabilities. 

Shares of the Fund are distributed by Dean Witter Distributors Inc. (the 
"Distributor"), an affiliate of the Investment Manager. The Distributor has 
informed the Fund that for the six months ended June 30, 1997, it received 
approximately $357,000 in commissions from the sale of the Fund's shares. 
Such commissions are deducted from the proceeds of the Fund's shares and are 
not an expense of the Fund. 

4. SHARES OF BENEFICIAL INTEREST 

Transactions in shares of beneficial interest were as follows: 

<TABLE>
<CAPTION>
                                                       FOR THE SIX                   FOR THE YEAR 
                                                      MONTHS ENDED                      ENDED 
                                                      JUNE 30, 1997               DECEMBER 31, 1996 
                                             ----------------------------- ------------------------------ 
                                                       (UNAUDITED) 
                                                 SHARES         AMOUNT          SHARES         AMOUNT 
                                             ------------- --------------- -------------- --------------- 
<S>                                          <C>           <C>             <C>            <C>
Sold                                            1,273,577    $ 13,065,247      3,179,464    $  37,259,996 
Reinvestment of dividends and distributions     1,268,200      16,660,932      3,684,669       43,078,883 
                                             ------------- --------------- -------------- --------------- 
                                                2,541,777      29,726,179      6,864,133       80,338,879 
Repurchased                                    (8,416,824)    (98,397,561)   (15,389,992)    (179,989,017) 
                                             ------------- --------------- -------------- --------------- 
Net decrease                                   (5,875,047)   $(68,671,382)    (8,525,859)   $ (99,650,138) 
                                             ============= =============== ============== =============== 
</TABLE>

5. FEDERAL INCOME TAX STATUS 

Capital losses incurred after October 31 ("post-October" losses) within the 
taxable year are deemed to arise on the first business day of the Fund's next 
taxable year. The Fund incurred and will elect to defer net capital losses of 
approximately $146,000 during fiscal 1996. 

As of December 31, 1996, the Fund had temporary book/tax differences 
primarily attributable to post-October losses. 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS June 30, 1997 (unaudited) continued 


6. SUBSEQUENT EVENTS 

On June 30, 1997, the Fund's Board of Trustees approved a proposal to adopt a 
multiple class share structure. Through this arrangement, the Fund will offer 
four classes of shares with various sales charges, ongoing fees and other 
features. This conversion occurred on July 28, 1997. 

On June 30, 1997, the Board of Trustees of the Fund and of Dean Witter 
National Municipal Trust ("National Municipal") approved a reorganization 
plan whereby National Municipal would be merged into the Fund. This plan is 
subject to the consent of National Municipal shareholders. If approved, the 
assets of National Municipal would be combined with those of the Fund and 
shareholders of National Municipal would become shareholders of the Fund, 
receiving shares equal to the value of their holdings in National Municipal. 

<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL HIGHLIGHTS 


Selected ratios and per share data for a share of beneficial interest 
outstanding throughout each period: 

<TABLE>
<CAPTION>
                                        
                                           FOR THE SIX              FOR THE YEAR ENDED DECEMBER 31, 
                                          MONTHS ENDED  -----------------------------------------------------                      
                                          JUNE 30, 1997     1996       1995       1994       1993      1992 
- -------------------------------------------------------------------------------------------------------------
                                           (UNAUDITED) 
<S>                                     <C>             <C>        <C>        <C>        <C>        <C>
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period ...     $11.77        $12.09     $11.01     $12.41     $11.88    $11.65 
                                        --------------- ---------- ---------- ---------- ---------- --------- 
Net investment income ..................       0.32          0.65       0.67       0.70       0.77      0.79 
Net realized and unrealized gain 
 (loss).................................       0.01         (0.24)      1.19      (1.37)      0.54      0.23 
                                        --------------- ---------- ---------- ---------- ---------- --------- 
Total from investment operations .......       0.33          0.41       1.86      (0.67)      1.31      1.02 
                                        --------------- ---------- ---------- ---------- ---------- --------- 
Less dividends and distributions from: 
 Net investment income..................      (0.32)        (0.65)     (0.67)     (0.70)     (0.77)    (0.79) 
 Net realized gain......................         --*        (0.08)     (0.11)     (0.03)     (0.01)     -- 
                                        --------------- ---------- ---------- ---------- ---------- --------- 
Total dividends and distributions ......      (0.32)        (0.73)     (0.78)     (0.73)     (0.78)    (0.79) 
                                        --------------- ---------- ---------- ---------- ---------- --------- 
Net asset value, end of period..........     $11.78        $11.77     $12.09     $11.01     $12.41    $11.88 
                                        =============== ========== ========== ========== ========== ========= 
TOTAL INVESTMENT RETURN+ ...............       2.79%(1)      3.61%     17.37%     (5.55)%    11.23%     9.09% 
RATIOS TO AVERAGE NET ASSETS: 
Expenses................................       0.49%(2)      0.48%      0.48%      0.47%      0.47%     0.49% 
Net investment income...................       5.43%(2)      5.52%      5.76%      6.02%      6.23%     6.74% 
SUPPLEMENTAL DATA: 
Net assets, end of period, in millions .      $1,122       $1,190     $1,325     $1,295     $1,582    $1,323 
Portfolio turnover rate.................          5%(1)        18%        21%        16%        13%        4% 
</TABLE>

- ------------ 
*       The Fund paid a capital gain distribution of $0.004. 
+       Does not reflect the deduction of sales load. Calculated based on the 
        net asset value as of the last business day of the period. 
(1)     Not annualized. 
(2)     Annualized. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>

TRUSTEES 

Michael Bozic 
Charles A. Fiumefreddo 
Edwin J. Garn 
John R. Haire 
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 

James F. Willison 
Vice President 

Joseph R. Arcieri 
Vice President 

Thomas F. Caloia 
Treasurer 


TRANSFER AGENT 

Dean Witter Trust Company 
Harborside Financial Center--
Plaza Two 
Jersey City, New Jersey 07311 


INDEPENDENT ACCOUNTANTS 

Price Waterhouse LLP 
1177 Avenue of the Americas 
New York, New York 10036 


INVESTMENT MANAGER 

Dean Witter InterCapital Inc. 
Two World Trade Center
New York, New York 10048

The financial statements included herein have been taken from the records of
the Fund without examination by the independent accountants and accordingly
they do not express an opinion thereon.

This report is submitted for the general information of shareholders of the
Fund. For more detailed information about the Fund, its officers and trustees,
fees, expenses and other pertinent information, please see the prospectus of 
the Fund.

This report is not authorized for distribution to prospective investors in the
Fund unless preceded or accompanied by an effective prospectus.

DEAN WITTER
TAX-EXEMPT
SECURITIES
TRUST

SEMIANNUAL REPORT 
JUNE 30, 1997

<PAGE>

                   DEAN WITTER TAX-EXEMPT SECURITIES TRUST 

                                    PART B 
                     STATEMENT OF ADDITIONAL INFORMATION 

   
   This Statement of Additional Information relates to the shares of Dean 
Witter Tax-Exempt Securities Trust ("Tax-Exempt") to be issued pursuant to an 
Agreement and Plan of Reorganization, dated June 30, 1997, between Tax-Exempt 
and Dean Witter National Municipal Trust ("National Municipal") in connection 
with the acquisition by Tax-Exempt of substantially all of the assets, 
subject to stated liabilities, of National Municipal. This Statement of 
Additional Information does not constitute a prospectus. This Statement of 
Additional Information does not include all information that a shareholder 
should consider before voting on the proposals contained in the Proxy 
Statement and Prospectus, and, therefore, should be read in conjunction with 
the related Proxy Statement and Prospectus, dated August 20, 1997. A copy of 
the Proxy Statement and Prospectus may be obtained without charge by mailing 
a written request to Tax-Exempt at Two World Trade Center, New York, New York 
10048 or by calling (212) 392-2550 or (800) 526-3143 (TOLL FREE). Please 
retain this document for future reference. 

THE DATE OF THIS STATEMENT OF ADDITIONAL INFORMATION IS AUGUST 20, 1997. 
    

                                     B-1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                               PAGE 
<S>                                            <C>
INTRODUCTION................................   B-3 
ADDITIONAL INFORMATION ABOUT TAX-EXEMPT ....   B-3 
FINANCIAL STATEMENTS........................   B-4 
</TABLE>

                                      B-2
<PAGE>

                                 INTRODUCTION

   
   This Statement of Additional Information is intended to supplement the 
information provided in the Proxy Statement and Prospectus dated August 20, 
1997 (the "Proxy Statement and Prospectus"). The Proxy Statement and 
Prospectus has been sent to National Municipal shareholders in connection 
with the solicitation of proxies by the Board of Trustees of National 
Municipal to be voted at the Special Meeting of Shareholders of National 
Municipal to be held on October 24, 1997. This Statement of Additional 
Information incorporates by reference the Statement of Additional Information 
of Tax-Exempt dated July 28, 1997 and the Statement of Additional Information 
of National Municipal dated November 26, 1996. 
    

                   ADDITIONAL INFORMATION ABOUT TAX-EXEMPT 

INVESTMENT OBJECTIVES AND POLICIES 

   For additional information about Tax-Exempt's investment objectives and 
policies, see "Investment Practices and Policies" and "Investment 
Restrictions" in Tax-Exempt's Statement of Additional Information. 

MANAGEMENT 

   For additional information about the Board of Directors, officers and 
management personnel of Tax-Exempt, see "The Fund and Its Management" and 
"Directors and Officers" in Tax-Exempt's Statement of Additional Information. 

INVESTMENT ADVISORY AND OTHER SERVICES 

   For additional information about Tax-Exempt's investment manager, see "The 
Fund and Its Management" in Tax-Exempt's Statement of Additional Information. 
For additional information about Tax-Exempt's independent auditors, see 
"Independent Accountants" in Tax-Exempt's Statement of Additional 
Information. For additional information about other services provided to 
Tax-Exempt see "Custodian and Transfer Agent" and "Shareholder Services" in 
Tax-Exempt's Statement of Additional Information. 

PORTFOLIO TRANSACTIONS AND BROKERAGE 

   For additional information about brokerage allocation practices, see 
"Portfolio Transactions and Brokerage" in Tax-Exempt's Statement of 
Additional Information. 

DESCRIPTION OF FUND SHARES 

   For additional information about the voting rights and other 
characteristics of the shares of Tax-Exempt, see "Description of Shares" in 
Tax-Exempt's Statement of Additional Information. 

PURCHASE, REDEMPTION AND PRICING OF SHARES 

   For additional information about the purchase and redemption of 
Tax-Exempt's shares and the determination of net asset value, see "Purchase 
of Fund Shares," "Redemptions and Repurchases," "Financial Statements -- 
December 31, 1996" and "Shareholder Services" in Tax-Exempt's Statement of 
Additional Information. 

DIVIDENDS, DISTRIBUTIONS AND TAX STATUS 

   For additional information about Tax-Exempt's policies regarding dividends 
and distributions and tax matters affecting Tax-Exempt and its shareholders, 
see "Dividends, Distributions and Taxes" and "Financial Statements -- 
December 31, 1996" in Tax-Exempt's Statement of Additional Information. 

                               B-3           
<PAGE>

DISTRIBUTION OF SHARES 

   For additional information about Tax-Exempt's distributor and the 
distribution agreement between Tax-Exempt and its distributor, see "Purchase 
of Fund Shares" in Tax-Exempt's Statement of Additional Information. 

PERFORMANCE DATA 

   For additional information about Tax-Exempt's performance data, see 
"Performance Information" in Tax-Exempt's Statement of Additional 
Information. 

                             FINANCIAL STATEMENTS 

   Tax-Exempt's most recent audited financial statements are set forth in 
Tax-Exempt's Annual Report for the fiscal year ended December 31, 1996 and 
Tax-Exempt's updated, unaudited financial statements are set forth in its 
Semi-Annual Report for the six month period ended June 30, 1997. Copies of 
both Reports accompany, and are incorporated by reference in, the Proxy 
Statement and Prospectus. National Municipal's most recent audited financial 
statements are set forth in National Municipal's Annual Report for its fiscal 
year ended September 30, 1996, which is incorporated by reference in the 
Proxy Statement and Prospectus. In addition, National Municipal's updated, 
unaudited financial statements are set forth in its Semi-Annual Report for 
the six month period ended March 31, 1997, which is incorporated by reference 
to the Proxy Statement and Prospectus. 

                                      B-4
<PAGE>

STATEMENT OF ADDITIONAL INFORMATION                         DEAN WITTER 
JULY 28, 1997                                               TAX-EXEMPT  
                                                            SECURITIES 
                                                            TRUST 
- ----------------------------------------------------------------------------- 

   Dean Witter Tax-Exempt Securities Trust (the "Fund") is an open-end, 
diversified management investment company whose investment objective is to 
provide a high level of current income exempt from federal income tax, 
consistent with the preservation of capital. The Fund invests principally in 
tax-exempt fixed-income securities which are rated in the three highest 
categories by Moody's Investors Service, Inc. or Standard & Poor's 
Corporation. (See "Investment Practices and Policies.") 

   A Prospectus for the Fund dated July 28, 1997, which provides the basic 
information you should know before investing in the Fund, may be obtained 
without charge from the Fund at its address or telephone numbers listed below 
or from the Fund's Distributor, 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. 

Dean Witter 
Tax-Exempt Securities Trust 
Two World Trade Center 
New York, New York 10048 
(212) 392-2550 or 
(800) 869-NEWS (toll-free) 

<PAGE>

TABLE OF CONTENTS 
- ----------------------------------------------------------------------------- 

<TABLE>
<CAPTION>
<S>                                      <C>
The Fund and its Management............   3 
Trustees and Officers..................   6 
Investment Practices and Policies .....  12 
Investment Restrictions................  18 
Portfolio Transactions and Brokerage ..  19 
The Distributor .......................  20 
Determination of Net Asset Value  .....  23 
Purchase of Fund Shares................  23 
Shareholder Services...................  26 
Redemptions and Repurchases............  30 
Dividends, Distributions and Taxes ....  31 
Performance Information................  32 
Description of Shares of the Fund .....  34 
Custodian and Transfer Agent...........  34 
Independent Accountants................  35 
Reports to Shareholders................  35 
Legal Counsel..........................  36 
Experts................................  36 
Registration Statement.................  36 
Financial Statements--
  December 31, 1996....................  37 
Report of Independent Accountants .....  51 
Appendix...............................  52 
</TABLE>

                                       2
<PAGE>

THE FUND AND ITS MANAGEMENT 
- ----------------------------------------------------------------------------- 

THE FUND 

   The Fund was incorporated in the State of Maryland on December 31, 1979 
under the name InterCapital Tax-Exempt Securities Inc. On March 17, 1983, the 
Fund's shareholders approved a change in the Fund's name, effective March 21, 
1983, to Dean Witter Tax-Exempt Securities Inc. On April 30, 1987 the Fund 
reorganized as a Massachusetts business trust, with the name Dean Witter 
Tax-Exempt Securities Trust. 

THE INVESTMENT MANAGER 

   Dean Witter InterCapital Inc. (the "Investment Manager" or 
"InterCapital"), whose address is Two World Trade Center, New York, New York 
10048, is the Fund's Investment Manager. InterCapital is a wholly-owned 
subsidiary of Morgan Stanley, Dean Witter, Discover & Co. ("MSDWD"), a 
Delaware corporation. In an internal reorganization which took place in 
January, 1993, InterCapital assumed the investment advisory, administrative 
and management activities previously performed by the InterCapital Division 
of Dean Witter Reynolds Inc. ("DWR"), a broker-dealer affiliate of 
InterCapital. (As hereinafter used in this Statement of Additional 
Information, the terms "InterCapital" and "Investment Manager" refer to DWR's 
InterCapital Division prior to the internal reorganization and to Dean Witter 
InterCapital Inc. thereafter.) The daily management of the Fund and research 
relating to the Fund's portfolio is conducted by or under the direction of 
officers of the Fund and of the Investment Manager, subject to periodic 
review by the Fund's Board of Trustees. Information as to these trustees and 
officers is contained under the caption "Trustees and Officers." 

   InterCapital is the investment manager or investment adviser of the 
following investment companies: Dean Witter Liquid Asset Fund Inc., 
InterCapital Income Securities Inc., InterCapital Insured Municipal Bond 
Trust, InterCapital Quality Municipal Investment Trust, InterCapital Insured 
Municipal Trust, InterCapital Quality Municipal Income Trust, InterCapital 
Insured Municipal Income Trust, InterCapital California Insured Municipal 
Income Trust, InterCapital Quality Municipal Securities, InterCapital 
California Quality Municipal Securities, InterCapital New York Quality 
Municipal Securities, InterCapital Insured Municipal Securities, InterCapital 
California Insured Municipal Securities, Dean Witter High Yield Securities 
Inc., Dean Witter Tax-Free Daily Income Trust, Dean Witter Developing Growth 
Securities Trust, Dean Witter Tax-Exempt Securities Trust, Dean Witter 
Natural Resource Development Securities Inc., Dean Witter Dividend Growth 
Securities Inc., Dean Witter American Value Fund, Dean Witter U.S. Government 
Money Market Trust, Dean Witter Variable Investment Series, Dean Witter World 
Wide Investment Trust, Dean Witter Select Municipal Reinvestment Fund, Dean 
Witter U.S. Government Securities Trust, Dean Witter California Tax-Free 
Income Fund, Dean Witter New York Tax-Free Income Fund, Dean Witter 
Convertible Securities Trust, Dean Witter Federal Securities Trust, Dean 
Witter Value-Added Market Series, High Income Advantage Trust, High Income 
Advantage Trust II, High Income Advantage Trust III, Dean Witter Government 
Income Trust, Dean Witter Utilities Fund, Dean Witter California Tax-Free 
Daily Income Trust, Dean Witter Strategist Fund, Dean Witter World Wide 
Income Trust, Dean Witter Intermediate Income Securities, Dean Witter New 
York Municipal Money Market Trust, Dean Witter Capital Growth Securities, 
Dean Witter European Growth Fund Inc., Dean Witter Precious Metals and 
Minerals Trust, Dean Witter Global Short-Term Income Fund Inc., Dean Witter 
Pacific Growth Fund Inc., Dean Witter Multi-State Municipal Series Trust, 
Dean Witter Short-Term U.S. Treasury Trust, Dean Witter Health Sciences 
Trust, Dean Witter Retirement Series, Dean Witter Limited Term Municipal 
Trust, Dean Witter Short-Term Bond Fund, Dean Witter Global Dividend Growth 
Securities, Dean Witter Global Utilities Fund, Dean Witter National Municipal 
Trust, Dean Witter High Income Securities, Dean Witter International Small 
Cap Fund, Dean Witter Mid-Cap Growth Fund, Dean Witter Select Dimensions 
Investment Series, Dean Witter Global Asset Allocation Fund, Dean Witter 
Balanced Growth Fund, Dean Witter Balanced Income Fund, Dean Witter Hawaii 
Municipal Trust, Dean Witter Capital Appreciation Fund, Dean Witter 
Intermediate Term U.S. Treasury Trust, Dean Witter Japan Fund, Dean Witter 
Income Builder Fund, Dean Witter Special Value Fund, Dean Witter Financial 
Services Trust, Dean Witter Market Leader Trust, Dean Witter Information 
Fund, Active Assets Money Trust, Active Assets Tax-Free Trust, Active Assets 
California Tax-Free Trust, Active Assets Government Securities Trust, 
Municipal Income Trust, Municipal Income Trust II, Municipal Income Trust 
III, Municipal Income Opportunities Trust, Municipal Income Opportunities 
Trust II, Municipal Income Opportunities 

                                       3
<PAGE>

Trust III, Prime Income Trust and Municipal Premium Income Trust. The 
foregoing investment companies, together with the Fund, are collectively 
referred to as the Dean Witter Funds. 

   In addition, Dean Witter Services Company Inc. ("DWSC"), a wholly-owned 
subsidiary of InterCapital, serves as manager for the following companies for 
which TCW Funds Management, Inc. is the investment adviser: TCW/DW Core 
Equity Trust, TCW/DW North American Government Income Trust, TCW/DW Latin 
American Growth Fund, TCW/DW Income and Growth Fund, TCW/DW Small Cap Growth 
Fund, TCW/DW Balanced Fund, TCW/DW Total Return Trust, TCW/DW Mid-Cap Equity 
Trust, TCW/DW Global Telecom Trust, TCW/DW Strategic Income Trust, TCW/DW 
Emerging Market Opportunities Trust, TCW/DW Term Trust 2000, TCW/DW Term 
Trust 2002 and TCW/DW Term Trust 2003 (the "TCW/DW Funds"). InterCapital also 
serves as (i) administrator of The Black Rock Strategic Term Trust Inc., a 
closed-end investment company; and (ii) sub-administrator of MassMutual 
Participation Investors and Templeton Global Governments Income Trust, 
closed-end investment companies. 

   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 and policies. 

   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, bookkeeping and legal services as the Fund may 
reasonably require in the conduct of its business, including the preparation 
of prospectuses, 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. 

   Effective December 31, 1993, pursuant to a Services Agreement between 
InterCapital and DWSC, DWSC began to provide the administrative services to 
the Fund which were previously performed directly by InterCapital. On April 
17, 1995, DWSC was reorganized in the State of Delaware, necessitating the 
entry into a new Services Agreement by InterCapital and DWSC on that date. 
The foregoing internal reorganizations did not result in any change in the 
nature or scope of the administrative services being provided to the Fund or 
any of the fees being paid by the Fund for the overall services being 
performed under the terms of the existing Agreement. 

   Expenses not expressly assumed by the Investment Manager under the 
Agreement or by the Distributor of the Fund's shares, Dean Witter 
Distributors Inc. ("Distributors" or the "Distributor") (see "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. The expenses borne by the Fund include, but are not limited to: 
expenses of the Plan of 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 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 Funds or of the Investment Manager (not including compensation 
or 

                                       4
<PAGE>

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 each business day: 0.50% of the portion of the daily net assets not 
exceeding $500 million; 0.425% of the portion of the daily net assets 
exceeding $500 million but not exceeding $750 million; 0.375% of the portion 
of the daily net assets exceeding $750 million but not exceeding $1 billion; 
0.35% of the portion of the daily net assets exceeding $1 billion but not 
exceeding $1.25 billion; and 0.325% of the portion of daily net assets 
exceeding $1.25 billion. For the fiscal years ended December 31, 1994, 1995 
and 1996, the Fund accrued to the Investment Manager total compensation of 
$6,003,589, $5,608,466 and $5,320,578, 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 Board of 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, as amended (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 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 Board of Trustees of the Fund; provided that in either 
event such continuance is approved annually by the vote of a majority of the 
Independent Trustees, which vote must be cast in person at a meeting called 
for the purpose of voting on such approval. 

   The Fund has acknowledged that the name "Dean Witter" is a property right 
of DWR. The Fund has agreed that DWR or its parent company may use or, at any 
time, permit others to use, the name "Dean Witter." The Fund has also agreed 
that in the event the Agreement is terminated, or if the affiliation between 
InterCapital and its parent company is terminated, the Fund will eliminate 
the name "Dean Witter" from its name if DWR or its parent company shall so 
request. 

                                       5
<PAGE>

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 
InterCapital, and with the 83 Dean Witter Funds and the 14 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 (56)                           Chairman and Chief Executive Officer of Levitz Furniture 
Trustee                                      Corporation (since November, 1995); Director or Trustee of the 
c/o Levitz Furniture Corporation             Dean Witter Funds; formerly President and Chief Executive Officer 
6111 Broken Sound Parkway, N.W.              of Hills Department Stores (May, 1991-July, 1995); formerly 
Boca Raton, Florida                          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., the United Negro College Fund and Weirton Steel 
                                             Corporation. 

Charles A. Fiumefreddo* (64)                 Chairman, Chief Executive Officer and Director of InterCapital, 
Trustee, Chairman, President and Chief       Distributors and DWSC; Executive Vice President and Director 
Executive Officer                            of DWR; Chairman, Director or Trustee, President and Chief 
Two World Trade Center                       Executive Officer of the Dean Witter Funds; Chairman, Chief 
New York, New York                           Executive Officer and Trustee of the TCW/DW Funds; Chairman 
                                             and Director of Dean Witter Trust Company ("DWTC"); Director 
                                             and/or officer of various MSDWD subsidiaries; formerly Executive 
                                             Vice President and Director of Dean Witter, Discover & Co. (until 
                                             February, 1993). 

Edwin J. Garn (64)                           Director or Trustee of the Dean Witter Funds; formerly United 
Trustee                                      States Senator (R-Utah)(1974-1992) and Chairman, Senate Banking 
c/o Huntsman Corporation                     Committee (1980-1986); formerly Mayor of Salt Lake City, Utah 
500 Huntsman Way                             (1972-1974); formerly Astronaut, Space Shuttle Discovery (April 
Salt Lake City, Utah                         12-19, 1985); Vice Chairman, Huntsman Corporation (since January, 
                                             1993); Director of Franklin Quest (time management systems) 
                                             and John Alden Financial Corp. (health insurance); member of 
                                             the board of various civic and charitable organizations. 

John R. Haire (72)                           Chairman of the Audit Committee and Chairman of the Committee 
Trustee                                      of the Independent Directors or Trustees and Director or Trustee 
Two World Trade Center                       of the Dean Witter Funds; Chairman of the Audit Committee and 
New York, New York                           Chairman of the Committee of the Independent Trustees and Trustee 
                                             of the TCW/DW Funds; formerly President, Council for Aid to 
                                             Education (1978-1989) and Chairman and Chief Executive Officer 
                                             of Anchor Corporation, an Investment Adviser (1964-1978); 
                                             Director of Washington National Corporation (insurance). 

                                       6
<PAGE>

  NAME, AGE, POSITION WITH FUND AND ADDRESS          PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS 
- -------------------------------------------- ---------------------------------------------------------- 
Wayne E. Hedien** (63)                       Retired; Director or Trustee of the Dean Witter Funds (commencing 
Trustee                                      on September 1, 1997); Director of The PMI Group, Inc. (private 
c/o Gordon Altman Butowsky                   mortgage insurance); Trustee and Vice Chairman of The Field 
    Weitzen Shalov & Wein                    Museum of Natural History; formerly associated with the Allstate 
Counsel to the Independent Trustees          Companies (1966-1994), most recently as Chairman of The Allstate 
114 West 47th Street                         Corporation (March, 1993-December, 1994) and Chairman and Chief 
New York, New York                           Executive Officer of its wholly-owned subsidiary, Allstate 
                                             Insurance Company (July, 1989-December, 1994); director of 
                                             various other business and charitable organizations. 

Dr. Manuel H. Johnson (48)                   Senior Partner, Johnson Smick International, Inc., a consulting 
Trustee                                      firm; Co-Chairman and a founder of the Group of Seven Council 
c/o Johnson Smick International, Inc.        (G7C), an international economic commission; Director or Trustee 
1133 Connecticut Avenue, N.W.                of the Dean Witter Funds; Trustee of the TCW/DW Funds; Director 
Washington, D.C.                             of NASDAQ (since June, 1995); Director of Greenwich Capital 
                                             Markets Inc. (broker-dealer); 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 (61)                       General Partner, Triumph Capital, L.P., a private investment 
Trustee                                      partnership; Director or Trustee of the Dean Witter Funds; Trustee 
c/o Triumph Capital, L.P.                    of the TCW/DW Funds; formerly Vice President, Bankers Trust 
237 Park Avenue                              Company and BT Capital Corporation (1984-1988); Director of 
New York, New York                           various business organizations. 

Philip J. Purcell* (53)                      Chairman of the Board of Directors and Chief Executive Officer 
Trustee                                      of MSDWD, DWR and Novus Credit Services Inc.; Director of 
1585 Broadway                                InterCapital, DWSC and Distributors; Director or Trustee of 
New York, New York                           the Dean Witter Funds; Director and/or officer of various MSDWD 
                                             subsidiaries. 

John L. Schroeder (66)                       Retired; Director or Trustee of the Dean Witter Funds; Trustee 
Trustee                                      of the TCW/DW Funds; Director of Citizens Utilities Company; 
c/o Gordon Altman Butowsky                   Formerly Executive Vice President and Chief Investment Officer 
 Weitzen Shalov & Wein                       of the Home Insurance Company (August, 1991-September, 1995). 
Counsel to the Independent Trustees 
114 West 47th Street 
New York, NY 

                                       7
<PAGE>

  NAME, AGE, POSITION WITH FUND AND ADDRESS          PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS 
- -------------------------------------------- ---------------------------------------------------------- 
Barry Fink (42)                              Senior Vice President (since March, 1997) and Secretary and 
Vice President, Secretary                    General Counsel (since February, 1997) of InterCapital and DWSC; 
 and General Counsel                         Senior Vice President (since March, 1997) and Assistant Secretary 
Two World Trade Center                       and Assistant General Counsel (since February, 1997) of 
New York, New York                           Distributors; Assistant Secretary of DWR (since August, 1996); 
                                             Vice President, Secretary and General Counsel of the 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 InterCapital and DWSC and Assistant Secretary of 
                                             the Dean Witter Funds and the TCW/DW Funds. 

James F. Willison (53)                       Senior Vice President of InterCapital; Vice President of various 
Vice President                               Dean Witter Funds. 
Two World Trade Center 
New York, New York 

Joseph R. Arcieri (48)                       Vice President of InterCapital; Vice President of various Dean 
Vice President                               Witter Funds. 
Two World Trade Center 
New York, New York 

Thomas F. Caloia (51)                        First Vice President and Assistant Treasurer of InterCapital 
Treasurer                                    and DWSC; Treasurer of the Dean Witter Funds and the TCW/DW 
Two World Trade Center                       Funds. 
New York, New York 
</TABLE>

- --------------
 * Denotes Trustees who are "interested persons" of the Fund, as defined in 
   the Act. 
** Mr. Hedien's term as Trustee will commence on September 1, 1997. 

   In addition, Robert M. Scanlan, President and Chief Operating Officer of 
InterCapital and DWSC, Executive Vice President of Distributors and DWTC and 
a Director of DWTC, Mitchell M. Merin, President and Chief Strategic Officer 
of InterCapital and DWSC, Executive Vice President of Distributors and DWTC 
and Director of DWTC, Executive Vice President and Director of DWR, and 
Director of SPS Transaction Services, Inc. and various other MSDWD 
subsidiaries, Robert S. Giambrone, Senior Vice President of InterCapital, 
DWSC, Distributors and DWTC and a Director of DWTC, Joseph J. McAlinden, 
Executive Vice President and Chief Investment Officer of InterCapital and a 
Director of DWTC, Peter M. Avelar, and Jonathan R. Page, Senior Vice 
Presidents of InterCapital, Katherine H. Stromberg and Gerard J. Lian, Vice 
Presidents of InterCapital, are Vice Presidents of the Fund, and Marilyn K. 
Cranney, First Vice President and Assistant General Counsel of InterCapital, 
and DWSC, and Lou Anne D. McInnis, Carsten Otto and Ruth Rossi, Vice 
Presidents and Assistant General Counsels of InterCapital and DWSC, and Frank 
Bruttomesso, a Staff Attorney with InterCapital, are Assistant Secretaries of 
the Fund. 

THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES 


   The Board of Trustees currently consists of eight (8) trustees; as noted 
above, Mr. Hedien's term will commence on September 1, 1997. These same 
individuals also serve as directors or trustees for all of the 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 83 Dean Witter 
Funds, comprised of 126 portfolios. As of June 30, 1997, the Dean Witter 
Funds had total net assets of approximately $87.9 billion and more than six 
million shareholders. 


   Six Trustees and Mr. Hedien (77% of the total number) have no affiliation 
or business connection with InterCapital or any of its affiliated persons and 
do not own any stock or other securities issued by 

                                       8
<PAGE>

InterCapital's parent company, MSDWD. These are the "disinterested" or 
"independent" Trustees. The other two Trustees (the "management Trustees") 
are affiliated with InterCapital. Four of the six 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 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 current Independent Trustees serve as members of the Audit 
Committee and the Committee of the Independent Trustees. Three of them also 
serve as members of the Derivatives Committee. During the calendar year ended 
December 31, 1996, the three Committees held a combined total of sixteen 
meetings. The Committees hold some meetings at InterCapital's offices and 
some outside InterCapital. Management Trustees or officers do not attend 
these meetings unless they are invited for purposes of furnishing information 
or making a report. 

   The Committee of the Independent Trustees is 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 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; reviewing the adequacy of 
the Fund's system of internal controls; and preparing and submitting 
Committee meeting minutes to the full Board. 

   Finally, the Board of each Fund has formed a Derivatives Committee to 
establish parameters for and oversee the activities of the Fund with respect 
to derivative investments, if any, made by the Fund. 

DUTIES OF CHAIRMAN OF COMMITTEE OF THE INDEPENDENT TRUSTEES AND AUDIT 
COMMITTEE 

   The Chairman of the Committee of the Independent Trustees and the Audit 
Committee maintains an office at the Funds' headquarters in New York. He is 
responsible for keeping abreast of regulatory and industry developments and 
the Funds' operations and management. He screens and/or prepares written 
materials and identifies critical issues for the Independent Trustees to 
consider, develops agendas for Committee meetings, determines the type and 
amount of information that the Committees will need to form a judgment on 
various issues, and arranges to have that information furnished to Committee 
members. He also arranges for the services of independent experts and 
consults with them in advance of meetings to help refine reports and to focus 
on critical issues. Members of the Committees believe that the person who 
serves as Chairman of both Committees and guides their efforts is pivotal to 
the effective functioning of the Committees. 

   The Chairman of the Committees also maintains continuous contact with the 
Funds' management, with independent counsel to the Independent Trustees and 
with the Funds' independent auditors. He arranges for a series of special 
meetings involving the annual review of investment advisory, 

                                       9
<PAGE>

management and other operating contracts of the Funds and, on behalf of the 
Committees, conducts negotiations with the Investment Manager and other 
service providers. In effect, the Chairman of the Committees serves as a 
combination of chief executive and support staff of the Independent Trustees. 

   The Chairman of the Committee of the Independent Trustees and the Audit 
Committee is not employed by any other organization and devotes his time 
primarily to the services he performs as Committee Chairman and Independent 
Trustee of the Dean Witter Funds and as an Independent Trustee and, since 
July 1, 1996, as Chairman of the Committee of the Independent Trustees and 
the Audit Committee of the TCW/DW Funds. The current Committee Chairman has 
had more than 35 years experience as a senior executive in the investment 
company industry. 

ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL DEAN 
WITTER FUNDS 

   The Independent Trustees and the Funds' management believe that having the 
same Independent Trustees for each of the 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, and a Chairman of their Committees, of the caliber, experience and 
business acumen of the individuals who serve as Independent Trustees of the 
Dean Witter Funds. 

COMPENSATION OF INDEPENDENT TRUSTEES 

   The Fund pays each Independent Trustee an annual fee of $1,000 plus a per 
meeting fee of $50 for meetings of the Board of Trustees or committees of the 
Board of Trustees attended by the Trustee (the Fund pays the Chairman of the 
Audit Committee an annual fee of $750 and pays the Chairman of the Committee 
of the Independent Trustees an additional annual fee of $1,200). 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. 

   The following table illustrates the compensation paid to the Fund's 
Independent Trustees by the Fund for the fiscal year ended December 31, 1996. 

                              FUND COMPENSATION 

<TABLE>
<CAPTION>
                                AGGREGATE 
                              COMPENSATION 
NAME OF INDEPENDENT TRUSTEE   FROM THE FUND 
- ---------------------------   -------------
<S>                              <C>
Michael Bozic ..............     $1,800 
Edwin J. Garn ..............      1,800 
John R. Haire ..............      3,900 
Dr. Manuel H. Johnson  .....      1,750 
Michael E. Nugent ..........      1,800 
John L. Schroeder...........      1,750 
</TABLE>

                                      10
<PAGE>

   The following table illustrates the compensation paid to the Fund's 
Independent Trustees for the calendar year ended December 31, 1996 for 
services to the 82 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, 1996. 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 Dean Witter Money Market Funds. 

          CASH COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS 

<TABLE>
<CAPTION>
                                                            FOR SERVICE AS 
                                                             CHAIRMAN OF 
                                                            COMMITTEES OF    FOR SERVICE AS 
                                                             INDEPENDENT      CHAIRMAN OF      TOTAL CASH 
                           FOR SERVICE                        DIRECTORS/     COMMITTEES OF    COMPENSATION 
                         AS DIRECTOR OR    FOR SERVICE AS    TRUSTEES AND     INDEPENDENT         PAID 
                           TRUSTEE AND      TRUSTEE AND         AUDIT           TRUSTEES     FOR SERVICES TO 
                        COMMITTEE MEMBER  COMMITTEE MEMBER COMMITTEES OF 82    AND AUDIT     82 DEAN WITTER 
NAME OF                 OF 82 DEAN WITTER   OF 14 TCW/DW     DEAN WITTER    COMMITTEES OF 14  FUNDS AND 14 
INDEPENDENT TRUSTEE           FUNDS            FUNDS            FUNDS         TCW/DW FUNDS    TCW/DW FUNDS 
- -------------------           -----            -----            -----         ------------    ------------ 
<S>                         <C>               <C>              <C>              <C>             <C>
Michael Bozic .........     $138,850               --                --              --         $138,850 
Edwin J. Garn .........      140,900               --                --              --          140,900 
John R. Haire .........      106,400          $64,283          $195,450         $12,187          378,320 
Dr. Manuel H. Johnson        137,100           66,483                --              --          203,583 
Michael E. Nugent  ....      138,850           64,283                --              --          203,133 
John L. Schroeder......      137,150           69,083                --              --          206,233 
</TABLE>

   As of the date of this Statement of Additional Information, 57 of the 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 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 25.0% of his or her Eligible Compensation plus 0.4166666% 
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 50.0% after ten years of service. The foregoing 
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. 

- ------------ 
(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. 

                                      11
<PAGE>

   The following table illustrates the retirement benefits accrued to the 
Fund's Independent Trustees by the Fund for the fiscal year ended December 
31, 1996 and by the 57 Dean Witter Funds (including the Fund) for the year 
ended December 31, 1996, and the estimated retirement benefits for the Fund's 
Independent Trustees, to commence upon their retirement, from the Fund as of 
December 31, 1996 and from the 57 Dean Witter Funds as of December 31, 1996. 

         RETIREMENT BENEFITS FROM THE FUND AND ALL DEAN WITTER FUNDS 

<TABLE>
<CAPTION>
                             
                              
                                                             
                                FOR ALL ADOPTING FUNDS                                      
                            -------------------------------   ESTIMATED ANNUAL  
                               ESTIMATED                     RETIREMENT BENEFITS       BENEFITS     
                               CREDITED                      ACCRUED AS EXPENSES  UPON RETIREMENT(2)
                                 YEARS         ESTIMATED    --------------------- ------------------
                             OF SERVICE AT   PERCENTAGE 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             50.0%        $ 338     $20,147   $  850   $ 51,325 
Edwin J. Garn ..............       10             50.0           473      27,772      850     51,325 
John R. Haire ..............       10             50.0          (376)(3)  46,952    2,304    129,550 
Dr. Manuel H. Johnson  .....       10             50.0           202      10,926      850     51,325 
Michael E. Nugent ..........       10             50.0           338      19,217      850     51,325 
John L. Schroeder...........        8             41.7           645      38,700      708     42,771 
</TABLE>

- --------------
(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 
       Trustee until June 1, 1998. 

   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 
- ----------------------------------------------------------------------------- 

PORTFOLIO SECURITIES 

   The payment of principal and interest by issuers of certain Municipal 
Bonds and Notes ("Municipal Obligations") purchased by the Fund may be 
guaranteed by letters of credit or other credit facilities offered by banks 
or other financial institutions. Such guarantees will be considered in 
determining whether a Municipal Obligation meets the Fund's investment 
quality requirements. In addition, some issues may contain provisions which 
permit the Fund to demand from the issuer repayment of principal at some 
specified period(s) prior to maturity. 

   Municipal Bonds. Municipal Bonds, as referred to in the Prospectus, are 
debt obligations of a state, its cities, municipalities and municipal 
agencies (all of which are generally referred to as "municipalities") which 
generally have a maturity at the time of issuance of one year or more, and 
the interest from which is, in the opinion of bond counsel, exempt from 
federal income tax. They are issued to raise funds for various public 
purposes, such as construction of a wide range of public facilities, to 
refund outstanding obligations and to obtain funds for general operating 
expenses or to loan to other public institutions and facilities. In addition, 
certain types of industrial development bonds and pollution control bonds are 
issued by or on behalf of public authorities to provide funding for various 
privately operated facilities. 

   Municipal Notes. Municipal Notes are short-term obligations of 
municipalities, generally with a maturity at the time of issuance ranging 
from six months to three years, the interest from which is, in the opinion of 
bond counsel, exempt from federal income tax. The principal types of 
Municipal Notes include tax anticipation notes, bond anticipation notes, 
revenue anticipation notes and project notes, although there are other types 
of Municipal Notes in which the Fund may invest. Notes sold in anticipation 
of collection of taxes, a bond sale or receipt of other revenues are usually 
general obligations of the issuing municipality or agency. Project Notes are 
issued by local agencies and are guaranteed by the United States Department 
of Housing and Urban Development. Such notes are secured by the full faith 
and credit of the United States Government. Project Notes are not currently 
being issued. 

                                      12
<PAGE>
 
  Municipal Commercial Paper. Municipal Commercial Paper refers to 
short-term obligations of municipalities the interest from which is, in the 
opinion of bond counsel, exempt from federal income tax, and which may be 
issued at a discount and is sometimes referred to as Short-Term Discount 
Notes. Municipal Commercial Paper is likely to be used to meet seasonal 
working capital needs of a municipality or interim construction financing and 
to be paid from general revenues of the municipality or refinanced with 
long-term debt. In most cases, Municipal Commercial Paper is backed by 
letters of credit, lending agreements, note repurchase agreements or other 
credit facility agreements offered by banks or other institutions. 

   Obligations of issuers of Municipal Bonds, Municipal Notes and Municipal 
Commercial Paper are subject to provisions of bankruptcy, insolvency and 
other laws affecting the rights and remedies of creditors, such as the 
Federal Bankruptcy Act, and laws, if any, which may be enacted by Congress or 
any state extending the time for payment of principal or interest, or both, 
or imposing other constraints upon enforcement of such obligations or upon 
municipalities to levy taxes. There is also the possibility that, as a result 
of litigation or other conditions, the power or ability of any one or more 
issuers to pay, when due, principal of and interest on its, or their, 
Municipal Bonds, Municipal Notes and Municipal Commercial Paper may be 
materially affected. 

   Special Investment Considerations. The percentage and rating policies in 
the Prospectus apply at the time of acquisition of a security based upon the 
last previous determination of the Fund's net asset value; any subsequent 
change in any ratings by a rating service or change in percentages resulting 
from market fluctuations or other changes in the amount of total assets will 
not require elimination of any security from the Fund's portfolio until such 
time as the Investment Manager determines that it is practicable to sell the 
security without undue market or tax consequences to the Fund. Therefore, the 
Fund may hold securities which have been downgraded to ratings of Ba or BB or 
lower by Moody's or S&P. Such securities are considered to be speculative 
investments. 

   Furthermore, the Fund does not have any minimum quality rating standard 
for its downgraded or lower-rated investments. As such, the Fund may invest 
in securities rated as low as Caa, Ca or C by Moody's or CCC, CC, C or CI by 
S&P. Bonds rated Caa or Ca by Moody's may already be in default on payment of 
interest or principal, while bonds rated C by Moody's, their lowest bond 
rating, can be regarded as having extremely poor prospects of ever attaining 
any real investment standing. Bonds rated CI by S&P, their lowest bond 
rating, are no longer making interest payments. 

   Because of the special nature of securities which are rated below 
investment grade by national credit rating agencies ("lower-rated 
securities"), the Investment Manager must take account of certain special 
considerations in assessing the risks associated with such investments. For 
example, as the lower rated securities market is relatively new, its growth 
has paralleled a long economic expansion and it has not weathered a recession 
in its present size and form. Therefore, an economic downturn or increase in 
interest rates is likely to have a negative effect on this market and on the 
value of the lower rated 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 lower rated 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 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 lower rated 
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 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 lower rated 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. 

                                      13
<PAGE>

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 lower rated 
securities at certain times and should make it difficult for the Fund to sell 
certain securities. In addition, new laws and potential new laws may have an 
adverse effect upon the value of lower rated securities and a concomitant 
negative impact upon the net asset value of a share of the Fund. 

PORTFOLIO CHARACTERISTICS 

   Variable Rate Obligations. As stated in the Prospectus, the Fund may 
invest in obligations of the type called "variable rate obligations." 

   The interest rate payable on a variable rate obligation is adjusted either 
at predesignated periodic intervals or whenever there is a change in the 
market rate of interest on which the interest rate payable is based. Other 
features may include the right whereby the Fund may demand prepayment of the 
principal amount of the obligation prior to its stated maturity (a "demand 
feature") and the right of the issuer to prepay the principal amount prior to 
maturity. The principal benefit of a variable rate obligation is that the 
interest rate adjustment minimizes changes in the market value of the 
obligation. The principal benefit to the Fund of purchasing obligations with 
a demand feature is that liquidity, and the ability of the Fund to obtain 
repayment of the full principal amount of the obligation prior to maturity, 
is enhanced. 

   When-Issued and Delayed Delivery Securities. As stated in the Prospectus, 
the Fund may purchase tax-exempt securities on a when-issued or delayed 
delivery 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. While the Fund will only purchase 
securities on a when-issued or delayed delivery basis with the intention of 
acquiring the securities, the Fund may sell the securities before the 
settlement date, if it is deemed advisable. The securities so purchased or 
sold are subject to market fluctuation and no interest accrues to the 
purchaser during this period. At the time the Fund makes the commitment to 
purchase a Municipal Obligation on a when-issued or delayed delivery basis, 
it will record the transaction and thereafter reflect the value, each day, of 
the Municipal Obligation in determining its net asset value. The Fund will 
also establish a segregated account with its custodian bank in which it will 
maintain cash, cash equivalents or other high quality Municipal Obligations 
equal in value to commitments for such when-issued or delayed delivery 
securities. The Fund does not believe that its net asset value or income will 
be adversely affected by its purchase of Municipal Obligations on a 
when-issued or delayed delivery basis. The Fund may sell securities on a 
when-issued or delayed delivery basis provided that the Fund owns the 
security at the time of the sale. 

   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. 
These agreements, which may be viewed as a type of secured lending by the 
Fund, 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 ("collateral"), which is held by the Fund's Custodian, at a 
specified price and at a fixed time in the future, usually not more than 
seven days from the date of purchase. The Fund will receive 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. These procedures 
include effecting repurchase transactions only with large, well-capitalized 
and well-established financial institutions, whose financial condition will 
be continually monitored by the Investment Manager. In addition, the value of 
the collateral underlying the repurchase agreement will always be a least 
equal to the repurchase price, including any accrued interest earned on the 
repurchase agreement. In the event of a default or bankruptcy by a selling 
financial institution, the Fund will seek to liquidate such collateral. 
However, the exercising of the Fund's right to liquidate such collateral 
could involve certain costs or delays and, to the extent that proceeds from 
any sale upon a default of the obligation to repurchase were less than the 
repurchase price, the Fund could suffer a loss. It is the current policy of 
the Fund not to invest in repurchase agreements that do not mature within 
seven days if any such investment, together with any other illiquid assets 
held by the Fund, amounts to more than 10% of its total assets. The Fund's 
investments in repurchase 

                                      14
<PAGE>

agreements may at times be substantial when, in the view of the Investment 
Manager, liquidity or other considerations warrant. However, the Fund did not 
enter into any repurchase agreements during its fiscal year ended December 
31, 1996 and it has no intention of entering into any such agreements in the 
foreseeable future. 

FUTURES CONTRACTS AND OPTIONS ON FUTURES 

   As discussed in the Prospectus, the Fund may invest in financial futures 
contracts ("futures contracts") and related options thereon. These futures 
contracts and related options thereon will be used only as a hedge against 
anticipated interest rate changes. A futures contract sale creates an 
obligation by the Fund, as seller, to deliver the specific type of instrument 
called for in the contract at a specified future time for a specified price. 
A futures contract purchase would create an obligation by the Fund, as 
purchaser, to take delivery of the specific type of financial instrument at a 
specified future time at a specified price. The specific securities delivered 
or taken, respectively, at settlement date, would not be determined until on 
or near that date. The determination would be in accordance with the rules of 
the exchange on which the futures contract sale or purchase was effected. 

   Although the terms of futures contracts specify actual delivery or receipt 
of securities, in most instances the contracts are closed out before the 
settlement date without the making or taking of delivery of the securities. 
Closing out of a futures contract is usually effected by entering into an 
offsetting transaction. An offsetting transaction for a futures contract sale 
is effected by the Fund entering into a futures contract purchase for the 
same aggregate amount of the specific type of financial instrument at the 
same delivery date. If the price in the sale exceeds the price in the 
offsetting purchase, the Fund is immediately paid the difference and thus 
realizes a gain. If the offsetting purchase price exceeds the sale price, the 
Fund pays the difference and realizes a loss. Similarly, the closing out of a 
futures contract purchase is effected by the Fund entering into a futures 
contract sale. If the offsetting sale price exceeds the purchase price the 
Fund realizes a gain, and if the offsetting sale price is less than the 
purchase price the Fund realizes a loss. 

   Unlike a futures contract, which requires the parties to buy and sell a 
security on a set date, an option on a futures contract entitles its holder 
to decide on or before a future date whether to enter into such a contract (a 
long position in the case of a call option and a short position in the case 
of a put option). If the holder decides not to enter into the contract, the 
premium paid for the contract is lost. Since the value of the option is fixed 
at the point of sale, there are no daily payments of cash to reflect the 
change in the value of the underlying contract, as discussed below for 
futures contracts. The value of the option changes is reflected in the net 
asset value of the Fund. 

   The Fund is required to maintain margin deposits with brokerage firms 
through which it effects futures contracts and options thereon. The initial 
margin requirements vary according to the type of the underlying security. In 
addition, due to current industry practice, daily variations in gains and 
losses on open contracts are required to be reflected in cash in the form of 
variation margin payments. The Fund may be required to make additional margin 
payments during the term of the contract. 

   Currently, futures contracts can be purchased on debt securities such as 
U.S. Treasury Bills and Bonds, U.S. Treasury Notes with maturities between 6 
1/2 and 10 years, Certificates of the Government National Mortgage 
Association, Bank Certificates of Deposit and on a municipal bond index (see 
below). The Fund may invest in interest rate futures contracts covering these 
types of financial instruments as well as in new types of contracts that 
become available in the future. 

   Financial futures contracts are traded in an auction environment on the 
floors of several Exchanges--principally, the Chicago Board of Trade, the 
Chicago Mercantile Exchange and the New York Futures Exchange. Each Exchange 
guarantees performance under contract provisions through a clearing 
corporation, a nonprofit organization managed by the Exchange membership 
which is also responsible for handling daily accounting of deposits or 
withdrawals of margin. 

   A risk in employing futures contracts to protect against the price 
volatility of portfolio securities is that the prices of securities subject 
to futures contracts may correlate imperfectly with the behavior of the cash 
prices of the Fund's portfolio securities. The correlation may be distorted 
by the fact that the futures market is dominated by short-term traders 
seeking to profit from the difference between a contract or 

                                      15
<PAGE>

security price objective and their cost of borrowed funds. This would reduce 
the value of futures contracts for hedging purposes over a short time period. 
The correlation may be further distorted since the futures contracts that are 
being used to hedge are not based on municipal obligations. 

   Another risk is that the Fund's Investment Manager could be incorrect in 
its expectations as to the direction or extent of various interest rate 
movements or the time span within which the movements take place. For 
example, if the Fund sold futures contracts for the sale of securities in 
anticipation of an increase in interest rates, and then interest rates went 
down instead, causing bond prices to rise, the Fund would lose money on the 
sale. 

   Put and call options on financial futures have characteristics similar to 
Exchange traded options. For a further description of options, see below and 
the Prospectus. 

   In addition to the risks associated in investing in options on securities, 
there are particular risks associated with investing in options on futures. 
In particular, the ability to establish and close out positions on such 
options will be subject to the development and maintenance of a liquid 
secondary market. It is not certain that such a market will develop. 

   The Fund may not enter into futures contracts or related options theron 
if, immediately thereafter, the amount committed to margin plus the amount 
paid for option premiums exceeds 5% of the value of the Fund's total assets. 
In instances involving the purchase of futures contracts by the Fund, an 
amount equal to the market value of the futures contract will be deposited in 
a segregated account of cash and cash equivalents to collateralize the 
position and thereby ensure that the use of such futures is unleveraged. The 
Fund may not purchase or sell futures contracts or related options if, 
immediately thereafter, more than one-third of its net assets would be 
hedged. 

   Municipal Bond Index Futures--The Fund may utilize municipal bond index 
futures contracts and options thereon for hedging purposes. The Fund's 
strategies in employing such contracts will be similar to that discussed 
above with respect to financial futures and options thereon. A municipal bond 
index is a method of reflecting in a single number the market value of many 
different municipal bonds and is designed to be representative of the 
municipal bond market generally. The index fluctuates in response to changes 
in the market values of the bonds included within the index. Unlike futures 
contracts on particular financial instruments, futures contracts on a 
municipal bond index will be settled in cash if held until the close of 
trading in the contract. However, as in any other futures contract, a 
position in the contract may be closed out by purchase or sale of an 
offsetting contract for the same delivery month prior to expiration of the 
contract. 

   Options--The Fund may purchase or sell (write) options on debt securities 
as a means of achieving additional return or hedging the value of the Fund's 
portfolio. The Fund will only buy options listed on national securities 
exchanges. The Fund will not purchase options if, as a result, the aggregate 
cost of all outstanding options exceeds 10% of the Fund's total assets. 

   Presently there are no options on tax-exempt securities traded on national 
securities exchanges and until such time as they become available, the Fund 
will not invest in options on debt securities. 

   A call option is a contract that gives the holder of the option the right 
to buy from the writer of the call option, in return for a premium, the 
security underlying the option at a specified exercise price at any time 
during the term of the option. The writer of the call option has the 
obligation, upon exercise of the option, to deliver the underlying security 
upon payment of the exercise price during the option period. A put option is 
a contract that gives the holder of the option the right to sell to the 
writer, in return for a premium, the underlying security at a specified price 
during the term of the option. The writer of the put has the obligation to 
buy the underlying security upon exercise, at the exercise price during the 
option period. 

   The Fund will only write covered call or covered put options listed on 
national exchanges. The Fund may not write covered options in an amount 
exceeding 20% of the value of its total assets. A call option is "covered" if 
the Fund owns the underlying security covered by the call or has an absolute 
and immediate right to acquire that security or futures contract without 
additional cash consideration (or for additional cash consideration held in a 
segregated account by its custodian) upon conversion or exchange of other 
securities held in its portfolio. A call option is also covered if the Fund 
holds a call on the same security or futures contract as the call written, 
where the exercise price of the call held is (i) 

                                      16
<PAGE>

equal to or less than the exercise price of the call written or (ii) greater 
than the exercise price of the call written if the difference is maintained 
by the Fund in cash, Treasury bills or other liquid portfolio securities in a 
segregated account with its custodian. A put option is "covered" if the Fund 
maintains cash, Treasury bills or other high grade short-term obligations 
with a value equal to the exercise price in a segregated account with its 
custodian, or else holds a put on the same security or futures contract as 
the put written where the exercise price of the put held is equal to or 
greater than the exercise price of the put written. 

   If the Fund has written an option, it may terminate its obligation by 
effecting a closing purchase transaction. This is accomplished by purchasing 
an option of the same series as the option previously written. However, once 
the Fund has been assigned an exercise notice, the Fund will be unable to 
effect a closing purchase transaction. Similarly, if the Fund is the holder 
of an option, it may liquidate its position by effecting a closing sale 
transaction. This is accomplished by selling an option of the same series as 
the option previously purchased. There can be no assurance that either a 
closing purchase or sale transaction can be effected when the Fund so 
desires. 

   The Fund will realize a profit from a closing transaction if the price of 
the transaction is less than the premium received from writing the option or 
is more than the premium paid to purchase the option; the Fund will realize a 
loss from a closing transaction if the price of the transaction is more than 
the premium received from writing the option or is less than the premium paid 
to purchase the option. Since call option prices generally reflect increases 
in the price of the underlying security, any loss resulting from the purchase 
of a call option may also be wholly or partially offset by unrealized 
appreciation of the underlying security. If a put option written by the Fund 
is exercised, the Fund may incur a loss equal to the difference between the 
exercise price of the option and the sum of the sale price of the underlying 
security plus the premiums received from the sale of the option. Other 
principal factors affecting the market value of a put or a call option 
include supply and demand, interest rates, the current market price and price 
volatility of the underlying security and the time remaining until the 
expiration date. 

   An option position may be closed out only on an exchange which provides a 
secondary market for an option of the same series. Although the Fund will 
generally purchase or write only those options for which there appears to be 
an active secondary market, there is no assurance that a liquid secondary 
market on an exchange will exist for any particular option. In such event, it 
might not be possible to effect closing transactions in particular options, 
so that the Fund would have to exercise its options in order to realize any 
profit and would incur brokerage commissions upon the exercise of call 
options and upon the subsequent disposition of underlying securities for the 
exercise of put options. If the Fund as a covered call option writer is 
unable to effect a closing purchase transaction in a secondary market, it 
will not be able to sell the underlying security until the option expires or 
it delivers the underlying security upon exercise. 

PORTFOLIO MANAGEMENT 

   The Fund may engage in short-term trading consistent with its investment 
objective. Securities may be sold in anticipation of a market decline (a rise 
in interest rates) or purchased in anticipation of a market rise (a decline 
in interest rates). In addition, a security may be sold and another security 
of comparable equality purchased at approximately the same time to take 
advantage of what the Investment Manager believes to be a temporary disparity 
in the normal yield relationship between the two securities. These yield 
disparities may occur for reasons not directly related to the investment 
quality of particular issues or the general movement of interest rates, such 
as changes in the overall demand for, or supply of, various types of 
tax-exempt securities. 

   In general, purchases and sales may also be made to restructure the 
portfolio in terms of average maturity, quality, coupon yield, or 
diversification for any one or more of the following purposes: (a) to 
increase income, (b) to improve portfolio quality, (c) to minimize capital 
depreciation, (d) to realize gains or losses, or for such other reasons as 
the Investment Manager deems relevant in light of economic and market 
conditions. 

   The Fund may invest in obligations customarily sold to institutional 
investors in private transactions with the issuers thereof and up to 5% of 
its total assets in securities for which a bona fide market does not exist at 
the time of purchase. With respect to any securities as to which a bona fide 
market does not exist, the Fund may be unable to dispose of such securities 
promptly at reasonable prices. 

                                      17
<PAGE>

   The Fund does not generally intend to invest more than 25% of its total 
assets in securities of any one governmental unit or in the securities of 
governmental units located in any one state, territory or possession of the 
United States. Subject to investment restriction number 3 disclosed in the 
Prospectus under the Section "Investment Restrictions," the Fund may invest 
more than 25% of its total assets in industrial development and pollution 
control bonds (two kinds of tax-exempt Municipal Bonds). 

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, which 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% of the shares present at a 
meeting of shareholders, if the holders of more than 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. For purposes of the following 
restrictions: (a) an "issuer" of a security is the entity whose assets and 
revenues are committed to the payment of interest and principal on that 
particular security, provided that the guarantee of a security will be 
considered a separate security, and provided further that a guarantee of a 
security shall not be deemed to be a security issued by the guarantor if the 
value of all securities issued or guaranteed by the guarantor and owned by 
the Fund does not exceed 10% of the value of the total assets of the Fund; 
(b) a "taxable security" is any security the interest on which is subject to 
federal income tax; and (c) all percentage limitations apply immediately 
after a purchase or initial investment, and any subsequent change in any 
applicable percentage resulting from market fluctuations or other changes in 
the amount of total or net assets does not require elimination of any 
security from the portfolio. 

   The Fund may not: 

       1. Invest in common stock.

       2. 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 issuer.

       3. Purchase or sell real estate or interests therein, although it may
   purchase securities secured by real estate or interests therein.

       4. Purchase or sell commodities except that the Fund may purchase or
   sell financial futures contracts and related options thereon.

       5. Purchase oil, gas or other mineral leases, rights or royalty
   contracts, or exploration or development programs.

       6. Write, purchase or sell puts, calls, or combinations thereof, except
   for options on futures contracts or options on debt securities.

       7. Purchase securities of other investment companies, except in
   connection with a merger, consolidation, reorganization or acquisition of
   assets.

       8. Borrow money, except that the Fund may borrow from a bank for
   temporary or emergency purposes in amounts not exceeding 5% (taken at the
   lower of cost or current value) of the value of its total assets (not
   including the amount borrowed).

       9. Pledge its assets or assign or otherwise encumber them except to
   secure borrowing effected within the limitations set forth in Restriction
   8. However, for the purpose of this restriction, collateral arrangements
   with respect to the writing of options and collateral arrangements with
   respect to initial margin for futures are not deemed to be pledges of
   assets.

       10. 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: (a)
   entering into any repurchase agreement; (b) purchasing any securities on a
   when-issued or delayed delivery basis; (c) purchasing or selling any
   financial futures contracts; (d) borrowing money in accordance with
   restrictions described above; or (e) lending portfolio securities.

                                      18
<PAGE>

       11. Make loans of money or securities, except: (a) by the purchase of
   debt obligations in which the Fund may invest consistent with its
   investment objective and policies; and (b) by investment in repurchase
   agreements.

       12. Make short sales of securities.

       13. Purchase securities on margin, except for such short-term loans as
   are necessary for the clearance of purchases of portfolio securities.

       14. 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.

       15. Invest for the purpose of exercising control or management of any
   other issuer.

   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, the 
Investment Manager is responsible for decisions to buy and sell securities 
and futures contracts for the Fund, the selection of brokers and dealers to 
effect the transactions, and the negotiation of brokerage commissions, if 
any. The Fund expects that the primary market for the securities in which it 
intends to invest will generally be the over-the-counter market. Securities 
are generally traded in the over-the-counter market on an "net" basis with 
dealers acting as principal for their own account without charging a stated 
commission, although the price of the security usually includes a profit to 
the dealer. Options and futures transactions will usually be effected through 
a broker and a commission will be charged. The Fund also expects that 
securities will be purchased at times in underwritten offerings, where the 
price includes a fixed amount of compensation, generally referred to as the 
underwriter's concession or discount. On occasion, the Fund may also purchase 
certain money market instruments directly from an issuer, in which case no 
commissions or discounts are paid. During the fiscal years ended December 31, 
1994, 1995 and 1996, the Fund paid no 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 may utilize a pro rata allocation process based on the 
size of the 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 and 
futures contracts for its portfolio is that primary consideration will be 
given to obtaining the most favorable prices and efficient execution of 
transactions. Consistent with this policy, when securities transactions are 
effected on a stock exchange, the Fund's policy is to pay commissions which 
are considered fair and reasonable without necessarily determining that the 
lowest possible commissions are paid in all circumstances. The Fund believes 
that a requirement always to seek the lowest commission cost could impede 
effective portfolio management and preclude the Fund and the Investment 
Manager from obtaining a high quality of brokerage and research services. In 
seeking to determine the reasonableness of brokerage commissions paid in any 
transaction, the Investment Manager relies upon its experience and knowledge 
regarding commissions generally charged by various brokers and on its 
judgment in evaluating the brokerage and research services received from the 
broker effecting the transaction. Such determinations are necessarily 
subjective and imprecise, as in most cases an exact dollar value for those 
services is not ascertainable. 

                                      19
<PAGE>

   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 who are capable of 
providing efficient executions. If the Investment Manager believes such price 
and execution 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 thus 
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 (not including 
Tax-Exempt Municipal 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 December 31, 1994, 1995 and 1996, 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 and other affiliated brokers and dealers. In order 
for an affiliated broker or dealer to effect 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 Trustees of the Fund, 
including a majority of the Trustees who are not "interested" Trustees, 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. The Fund did not effect 
any securities transactions through any affiliated brokers or dealers during 
its fiscal years ended December 31, 1994, 1995 and 1996. 

THE DISTRIBUTOR 
- ----------------------------------------------------------------------------- 

   As discussed in the Prospectus, shares of the Fund are distributed by 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 MSDWD. 
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 as 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 has an initial term ending April 30, 1998 
and will remain in effect from year to year thereafter if approved by the 
Board. 

   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 
account executives. 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 

                                      20
<PAGE>

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 losses sustained by the Fund or its shareholders. 

PLAN OF DISTRIBUTION 


   Effective July 28, 1997, 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%, 0.60% and 0.70% of 
the average daily net assets of Class A, Class B and Class C, respectively. 
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 front-end sales charges on sales of the 
Fund's shares in the approximate amounts of $2,276,000, $972,000 and 
$1,050,000 for the fiscal years ended December 31, 1994, 1995 and 1996, 
respectively. 


   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 0.15% 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 majority vote of the Board of Trustees, 
including all 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"), 
cast in person at a meeting called for the purpose of voting on the Plan, on 
June 30, 1997. 

   Under its terms, the Plan has an initial term ending April 30, 1998 and 
will continue from year to year thereafter, provided such continuance is 
approved annually by a vote of the Trustees in the manner described above. 

   Under the Plan and as required by Rule 12b-1, the Trustees receive and 
review promptly after the end of each calendar quarter a written report 
provided by the Distributor of the amounts expended under the Plan and the 
purpose for which such expenditures were made. 

   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. 

   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 0.15% of the current value 
of the respective accounts for which they are the account executives or 
dealers of record in all cases. On orders of $1 million or more (for which no 
sales charge was paid), the Investment Manager compensates DWR's account 
executives 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 account executives 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 and an annual 
residual commission, currently a residual of up to 0.15% of the current value 
of the respective accounts for which they are the account executives of 
record. 

                                      21
<PAGE>

   With respect to Class C shares, DWR compensates its account executives 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 0.70% of the current value 
of the respective accounts for which they are the account executives of 
record. 

   With respect to Class D shares other than shares held by participants in 
the InterCapital mutual fund asset allocation program, the Investment Manager 
compensates DWR's account executives 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 account 
executives 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 account executives of record (not including 
accounts of participants in the InterCapital mutual fund asset allocation 
program). 

   The gross sales credit is a charge which reflects commissions paid by DWR 
to its account executives 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. 

   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 0.70%, 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 account executives, 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 account executives (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. 

   At any given time, the expenses of 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. Because there is no requirement under 
the 

                                      22
<PAGE>

Plan that the Distributor be reimbursed for all distribution 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 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. 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 
financial interest in the operation of the Plan except to the extent that the 
Distributor, InterCapital, DWR, DWSC 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. 

   The Plan may not be amended to increase materially the amount to be spent 
for the services described therein without approval by the shareholders of 
the affected Class or Classes of the Fund, and all material amendments to 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 
- ----------------------------------------------------------------------------- 

   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 p.m., at 
such earlier time), on each day that the New York Stock Exchange is open. The 
New York Stock Exchange currently observes the following holidays: New Year's 
Day; Presidents' Day; Good Friday; Memorial Day; Independence Day; Labor Day; 
Thanksgiving Day; and Christmas Day. 

   Portfolio securities (other than short-term debt securities and futures 
and options) are valued for the Fund by an outside independent pricing 
service approved by the Board of Trustees. The pricing service has informed 
the Fund that in valuing the Fund's portfolio securities it uses both a 
computerized grid matrix of tax-exempt securities and evaluations by its 
staff, in each case based on information concerning market transactions and 
quotations from dealers which reflect the bid side of the market each day. 
The Fund's portfolio securities are thus valued by reference to a combination 
of transactions and quotations for the same or other securities believed to 
be comparable in quality, coupon, maturity, type of issue, call provisions, 
trading characteristics and other features deemed to be relevant. The Board 
of Trustees believes that timely and reliable market quotations are generally 
not readily available to the Fund for purposes of valuing tax-exempt 
securities and that the valuations supplied by the pricing service, using the 
procedures outlined above and subject to periodic review, are more likely to 
approximate the fair value of such securities. The Investment Manager will 
periodically review and evaluate the procedures, methods and quality of 
services provided by the pricing service then being used by the Fund and may, 
from time to time, recommend to the Board of Trustees the use of other 
pricing services or discontinuance of the use of any pricing service in whole 
or part. The Board may determine to approve such recommendation or take other 
provisions for pricing of the Fund's portfolio securities. 

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. 

                                      23
<PAGE>

   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 Dean Witter Funds that are 
multiple class funds ("Dean Witter Multi-Class Funds") or shares of other 
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 Dean Witter 
Trust Company (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 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 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 the investor. However, shares of "Exchange Funds" 
(see "Shareholder Services--Exchange Privilege") and the purchase of shares 
of other 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 

                                      24
<PAGE>

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. 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 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 Dean Witter Fund (see "Shareholder Services--Targeted 
Dividends"), plus (c) the current net asset value of shares acquired in 
exchange for (i) shares of Dean Witter front-end sales charge funds, or (ii) 
shares of other 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 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 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 years prior to the redemption 
and/or shares purchased through reinvestment of dividends or distributions 
and/or shares acquired in exchange for shares of Dean Witter front-end sales 
charge funds, or for shares of other 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 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 the month. The following table sets forth the rates of the 
CDSC applicable to Class B shares of the Fund: 

<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 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 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 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. 

                                      25
<PAGE>

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 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 
DWR or other selected broker-dealer. 

   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 at least five business days prior to the payment date 
of the dividend 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 DWR or other 
selected broker-dealer, and will be forwarded to the shareholder, upon the 
receipt of proper instructions. 

   Targeted Dividends. (Service Mark)  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 an 
open-end Dean Witter Fund other than Dean Witter Tax-Exempt Securities Trust 
or in another Class of Dean Witter Tax-Exempt Securities Trust. 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 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 Dean Witter Fund the next business day. To participate in the 
Targeted Dividends program, shareholders should contact their DWR or other 
selected broker-dealer account executive or the Transfer Agent. Shareholders 
of the Fund must be shareholders of the selected Class of the 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 Dean Witter Fund before entering the program. 

   EasyInvest. (Service Mark)  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 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. For further information or to 
subscribe to EasyInvest, shareholders should contact their DWR or other 
selected broker-dealer account executive or the Transfer Agent. 

   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 net asset value, without the imposition of a CDSC upon 
redemption, by returning the check or the proceeds to the Transfer Agent 
within thirty 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 proceeds by the Transfer 
Agent. 

                                      26
<PAGE>

   Systematic Withdrawal Plan. As discussed in the Prospectus, a systematic 
withdrawal plan (the "Withdrawal Plan") is available for shareholders who own 
or purchase shares of the Fund having a minimum value of $10,000 based upon 
their current net asset value. The plan provides for monthly or quarterly 
(March, June, September and December) checks in any dollar amount, not less 
than $25, or in any whole percentage of the account balance, on an annualized 
basis. Any applicable CDSC will be imposed on shares redeemed under the 
Withdrawal Plan (see "Purchase of Fund Shares"). Therefore, 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 or quarterly amount. 

   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 on the tenth or 
twenty-fifth day (or next following business day) of the relevant month or 
quarter and normally a check for the proceeds will be mailed by the Transfer 
Agent, or amounts credited to a shareholder's DWR or other selected 
broker-dealer brokerage account, within five days after the date of 
redemption. The Withdrawal Plan may be terminated at any time by the Fund. 

   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 the 
shareholder may make additional investments of $2,500 or more under the 
Withdrawal Plan, withdrawals made concurrently with purchases of additional 
shares may be inadvisable because of sales charges which may be applicable to 
purchases or redemptions of shares (see "Purchase of Fund Shares"). 

   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 and the address to which checks are mailed 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 
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 Dean Witter Tax-Exempt Securities Trust, 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 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: Dean Witter Short-Term U.S. Treasury Trust, Dean Witter 
Limited Term Municipal Trust, Dean Witter Short-Term Bond 

                                      27
<PAGE>

Fund, Dean Witter Intermediate Term U.S. Treasury Trust and five Dean Witter 
Funds which are money market funds (the foregoing nine funds are hereinafter 
referred to as the "Exchange Funds"). Class A shares may also be exchanged 
for shares of Dean Witter Multi-State Municipal Series Trust and Dean Witter 
Hawaii Municipal Trust, which are Dean Witter Funds sold with a front-end 
sales charge ("FSC Funds"). Class B shares may also be exchanged for shares 
of Dean Witter Global Short-Term Income Fund Inc., Dean Witter High Income 
Securities and Dean Witter National Municipal Trust, which are Dean Witter 
Funds offered with a CDSC ("CDSC 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 Dean 
Witter Multi-Class Fund or any CDSC 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 
Dean Witter Multi-Class Fund or in a CDSC 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 Dean Witter Multi-Class Fund or a CDSC Fund from the Exchange 
Fund, with no CDSC being imposed on such exchange. The holding period 
previously frozen when shares were first exchanged for shares of the Exchange 
Fund resumes on the last day of the month in which shares of a Dean Witter 
Multi-Class Fund or of a CDSC 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 Dean Witter Multi-Class Fund or in a 
CDSC 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 Dean Witter Multi-Class Fund or in a 
CDSC Fund are exchanged for shares of a Dean Witter Multi-Class Fund, shares 
of a CDSC 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 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 

                                      28
<PAGE>

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 $5,000 for Dean Witter Liquid 
Asset Fund Inc., Dean Witter Tax-Free Daily Income Trust, Dean Witter New 
York Municipal Money Market Trust and Dean Witter California Tax-Free Daily 
Income 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 Dean Witter 
Short-Term U.S. Treasury Trust, although that fund may, at its discretion, 
accept initial investments of as low as $5,000. The minimum initial 
investment for the Exchange Privilege account of each Class is $5,000 for 
Dean Witter Special Value Fund. The minimum initial investment for the 
Exchange Privilege account of each Class of all other 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 haved 
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 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 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 

                                      29
<PAGE>

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(s), policies and restrictions. 

   For further information regarding the Exchange Privilege, shareholders 
should contact their DWR or other selected broker-dealer account executive 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 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. 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" in the 
Prospectus) after it receives the request, and certificate, if any, in good 
order. Any redemption request received after such computation will be 
redeemed at the next determined net asset value. 

   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 the shareholder 
at an address other than the registered address, signatures 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 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 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. 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. 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 or bank 
cashier's check), payment of redemption proceeds may be delayed for the 
minimum time needed to verify that the check used for investment has 

                                      30
<PAGE>

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 account executive 
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 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 described in the Prospectus, 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 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 
- ----------------------------------------------------------------------------- 

   Each shareholder will receive at least a quarterly summary of his or her 
account, including information as to reinvested dividends and capital gains 
distributions. Share certificates for dividends or distributions will not be 
issued unless a shareholder requests in writing that a certificate be issued 
for a specific number of shares. 

   In computing net investment income, the Fund will amortize any premiums 
and original issue discounts on securities owned, if applicable. Capital 
gains or losses realized upon sale or maturity of such securities will be 
based on their amortized cost. 

   Gains or losses on the 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 capital gains or losses. 

   The Fund has qualified and intends to remain qualified as a regulated 
investment company under Subchapter M of the Internal Revenue Code. If so 
qualified, the Fund will not be subject to federal income tax on its net 
investment income and capital gains, if any, realized during any fiscal year 
to the extent that it distributes such income and capital gains to its 
shareholders. 

   With respect to the Fund's investments in zero coupon bonds, the Fund 
accrues income prior to any actual cash payments by their issuers. In order 
to continue to comply with Subchapter M of the Internal Revenue Code and 
remain able to forego payment of federal income tax on its income and capital 
gains, the Fund must distribute all of its net investment income, including 
income accrued from zero coupon bonds. As such, the Fund may be required to 
dispose of some of its portfolio securities under disadvantageous 
circumstances to generate the cash required for distribution. 

   As discussed in the Prospectus, the Fund intends to qualify to pay 
"exempt-interest dividends" to its shareholders by maintaining, as of the 
close of each of its taxable years, at least 50% of the value of its assets 
in tax-exempt securities. An exempt-interest dividend is that part of the 
dividend distributions made by the Fund which consists of interest received 
by the Fund on tax-exempt securities upon which the shareholder incurs no 
federal income taxes. Exempt-interest dividends are included however, in 
determining what portion, if any, of a person's Social Security benefits are 
subject to federal income tax. 

                                      31
<PAGE>

   As also discussed in the Prospectus, the Fund intends to invest a portion 
of its assets in certain "private activity bonds" issued after August 7, 
1986. As a result, a portion of the exempt-interest dividends paid by the 
Fund will be an item of tax preference to shareholders subject to the 
alternative minimum tax. Certain corporations which are subject to the 
alternative minimum tax may also have to include exempt-interest dividends in 
calculating their alternative minimum taxable income in situations where the 
"adjusted current earnings" of the corporation exceeds its alternative 
minimum taxable income. 

   Within sixty days after the end of its fiscal year, the Fund will mail to 
shareholders a statement indicating the percentage of the dividend 
distributions for each fiscal year which constitutes exempt-interest 
dividends, the percentage, if any, that is taxable, and the percentage, if 
any, of the exempt-interest dividends which constitutes an item of tax 
preference, and to what extent the taxable portion is long-term capital gain, 
short-term capital gain or ordinary income. This percentage should be applied 
uniformly to all monthly distributions made during the fiscal year to 
determine the proportion of dividends that is tax-exempt. The percentage may 
differ from the percentage of tax-exempt dividend distributions for any 
particular month. 

   Shareholders will be subject to federal income tax on dividends paid from 
interest income derived from taxable securities and on distributions of net 
short-term capital gains. Such dividends and distributions are taxable to the 
shareholder as ordinary dividend income regardless of whether the shareholder 
receives such distributions in additional shares or in cash. Distributions of 
long-term capital gains, if any, are taxable as long-term capital gains, 
regardless of how long the shareholder has held the Fund shares and 
regardless of whether the distribution is received in additional shares or in 
cash. Since the Fund's income is expected to be derived entirely from 
interest rather than dividends, it is anticipated that no portion of such 
dividend distributions will be eligible for the federal dividends received 
deduction available to corporations. 

   Interest on indebtedness incurred by shareholders to purchase or carry 
shares of the Fund is not deductible. Furthermore, entities or persons who 
are "substantial users" (or related persons) of facilities financed by 
industrial development bonds should consult their tax advisers before 
purchasing shares of the Fund. "Substantial user" is defined generally by 
Income Tax Regulation 1.103-11(b) as including a "non-exempt person" who 
regularly uses in a trade or business a part of a facility financed from the 
proceeds of industrial development bonds. 

   From time to time, proposals have been introduced before Congress for the 
purpose of restricting or eliminating the federal income tax exemption for 
interest on municipal securities. Similar proposals may be introduced in the 
future. If such a proposal were enacted, the availability of municipal 
securities for investment by the Fund could be affected. In that event, the 
Fund would re-evaluate its investment objective and policies. 

   Any dividends or capital gains distributions received by a shareholder 
from any investment company will have the effect of reducing the net asset 
value of the shareholder's shares in that fund by the exact amount of the 
dividend or capital gains distribution. Furthermore, capital gains 
distributions are, and some portion of the dividends may be, subject to 
income tax. If the net asset value of the shares should be reduced below a 
shareholder's cost as a result of the payment of taxable dividends or the 
distribution of capital gains, such payment or distribution would be in part 
a return of capital but nonetheless taxable to the shareholder. Therefore, an 
investor should consider the tax implications of purchasing Fund shares 
immediately prior to a distribution record date. 

   Shareholders should consult their tax advisers regarding specific 
questions as to 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. Prior to July 28, 1997, the Fund offered only one Class of shares. 
Because the distribution arrangement for Class A most closely resembles the 
distribution arrangement 

                                      32
<PAGE>

applicable prior to the implementation of multiple classes (i.e., Class A is 
sold with a front-end sales charge), historical performance information has 
been restated to reflect the actual maximum sales charge applicable to Class 
A (i.e., 4.25%) as compared to the 4.0% sales charge in effect prior to July 
28, 1997. In addition, because all shares of the Fund held prior to July 28, 
1997 have been designated Class D shares, the Fund's historical performance 
has also been restated to reflect the absence of any sales charge in the case 
of Class D shares. In addition, Class A shares are now subject to an ongoing 
12b-1 fee which is not reflected in the restated performance for that Class 
and would further reduce the performance quoted below. Following the restated 
performance information is the actual performance of the Fund as of its last 
fiscal year (prior to the implementation of multiple classes) without taking 
into effect the new fee and sales charge structure. 

   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 as 
described below; 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 (reduced by any undeclared earned income per share 
that is expected to be declared shortly after the end 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. 

   To determine interest income from debt obligations, a yield-to-maturity, 
expressed as a percentage, is determined for obligations held at the 
beginning of the period, based on the current market value of the security 
plus accrued interest, generally as of the end of the month preceding the 
30-day period, or, for obligations purchased during the period, based on the 
cost of the security (including accrued interest). The yield-to-maturity is 
multiplied by the market value (plus accrued interest) for each security and 
the result is divided by 360 and multiplied by 30 days or the number of days 
the security was held during the period, if less. Modifications are made for 
determining yield-to-maturity on certain tax-exempt securities. For the 
30-day period ended December 31, 1996, the Fund's restated yield for the 
Class A and Class D shares, calculated pursuant to the formula described 
above, was 4.68% and 4.89%, respectively. 

   The Fund may also quote a "tax-equivalent yield" for each Class determined 
by dividing the tax-exempt portion of quoted yield by 1 minus the stated 
income tax rate and adding the result to the portion of the yield that is not 
tax-exempt. The Fund's restated tax-equivalent yield for the Class A and 
Class D shares, based upon a Federal personal income tax bracket of 39.60% 
(the highest current individual marginal tax rate), for the 30-day period 
ended December 31, 1996 was 7.75% and 8.10%, respectively, based upon the 
yield quoted above. 

   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 restated average annual 
total returns of the Class A and Class D shares of the Fund for the year 
ended December 31, 1996 were -0.79% and 3.61%, respectively; for the five 
years ended December 31, 1996 were 5.94% and 6.86%, respectively; and for the 
ten years ended December 31, 1996 were 6.97% and 7.44%, 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 calculation 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 return of the Fund may be calculated in the 

                                      33
<PAGE>

manner described in the preceding paragraph, but without the deduction for 
any applicable sales charge. Based on this calculation, the Fund's average 
annual total return for Class A shares for the year ended December 31, 1996 
was 3.61%, the average annual total return for the five years ended December 
31, 1996 was 6.86% and the average annual total return for the ten years 
ended December 31, 1996 was 7.44%. Because the Class D shares are not subject 
to any sales charge, the Fund would only advertise average annual total 
return as calculated in the previous paragraph. 

   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 Fund's restated total return for both Class A and 
Class D shares for the year ended December 31, 1996 was 3.61%; the restated 
total return for the five years ended December 31, 1996 was 39.37%; and the 
restated total return for the ten years ended December 31, 1996 was 104.87%. 

   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, adjusted for the aforementioned sales charges, in Class A and Class 
D of the Fund at inception (March 27, 1980) would have grown to $45,017, 
$226,847 and $457,221, respectively, in the case of Class A, and $47,015, 
$235,075 and $470,150, respectively, in the case of Class D, at December 31, 
1996. 

   For the 30-day period ended December 31, 1996, the Fund's actual yield, 
calculated pursuant to the formula described above, was 4.69%. The Fund's 
tax-equivalent yield, calculated pursuant to the formula described above, for 
the 30-day period ended December 31, 1996 was 7.76% based on the yield quoted 
in the previous sentence. The average annual total returns of the Fund, 
calculated pursuant to the formula described above, for the year ended 
December 31, 1996, for the five years ended December 31, 1996, and for the 
ten years ended December 31, 1996 were -0.53%, 6.00% and 7.00%, respectively. 
The average annual total returns of the Fund calculated without the deduction 
for any applicable sales charge for the year ended December 31, 1996, for the 
five years ended December 31, 1996, and for the ten years ended December 31, 
1996, were 3.61%, 6.86% and 7.44%, respectively. The Fund's aggregate total 
return, calculated pursuant to the formula described above, for the year 
ended December 31, 1996 was 3.61%, the total return for the five years ended 
December 31, 1996 was 39.37% and the total return for the ten years ended 
December 31, 1996 was 104.87%. Investments of $10,000, $50,000 and $100,000, 
adjusted for the sales charges in effect at such time (4.0%, 3.25% or 2.75%, 
respectively), in the Fund at inception (March 27, 1980) would have grown to 
$45,134, $227,435 and $457,221, respectively, at December 31, 1996. 

   The Fund from time to time may also advertise its performance relative to 
certain performance rankings and indexes compiled by independent 
organizations. 

DESCRIPTION OF SHARES OF THE FUND 
- ----------------------------------------------------------------------------- 

   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 held on May 21, 
1997. On that date, Wayne E. Hedien was also elected as a Trustee of the 
Fund, with his term to commence on September 1, 1997. The Trustees themselves 
have the power to alter the number and the terms of office of the Trustees 
(as provided for in the Declaration of Trust), and they may at any time 
lengthen or shorten 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 

                                      34
<PAGE>

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 Declaration of Trust permits the Trustees to authorize the creation of 
additional series of shares (the managed portfolios) and additional classes 
of shares within any series (which would be used to distinguish among the 
rights of different categories of shareholders, as might be required by 
future regulations or other unforeseen circumstances). The Trustees have not 
presently authorized any such additional series or classes of shares other 
than as set forth in the Prospectus. 

   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 duties. It also provides that all third persons 
shall look solely to the Fund property for satisfaction of claims arising in 
connection with the affairs of the Fund. With the exceptions stated above, 
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 or the Trustees. 

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. The Custodian has no part in deciding the 
Fund's investment policies or which securities are to be purchased or sold 
for the Fund's portfolio. 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. 

   Dean Witter Trust Company, 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. Dean Witter Trust Company is an affiliate of Dean Witter InterCapital 
Inc., the Fund's Investment Manager, and Dean Witter Distributors Inc., the 
Fund's Distributor. As Transfer Agent and Dividend Disbursing Agent, Dean 
Witter Trust Company'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 Dean Witter Trust Company receives a per 
shareholder account fee from the Fund. 

INDEPENDENT ACCOUNTANTS 
- ----------------------------------------------------------------------------- 

   Price Waterhouse 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 audited by independent accountants, will be 
sent to shareholders each year. 

                                      35
<PAGE>

   The Fund's fiscal year is the calendar year. 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 year ended December 
31, 1996, 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 Price Waterhouse 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. 

                                      36
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996 

<TABLE>
<CAPTION>
  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
<S>          <C>                                                               <C>      <C>       <C>
             TAX-EXEMPT MUNICIPAL BONDS (94.5%) 
             General Obligation (11.4%) 
             North Slope Borough, Alaska, 
 $    5,000   Ser 1992 A Conv (MBIA) .........................................  5.90 %   06/30/03  $    5,358,450 
     15,000   Ser 1994 B (FSA) ...............................................  0.00     06/30/05       9,679,800 
     18,500   Ser 1995 A (MBIA) ..............................................  0.00     06/30/06      11,223,950 
     11,000   Ser 1996 B (MBIA) ..............................................  0.00     06/30/06       6,673,700 
     10,000   Ser 1996 B (MBIA) ..............................................  0.00     06/30/07       5,697,600 
      4,000  Connecticut, College Savings 1989 Ser A  ........................  0.00     07/01/08       2,209,080 
             Massachusetts, 
     20,000   Refg 1996 Ser A (AMBAC) ........................................  6.00     11/01/10      21,480,800 
     10,000   Refg 1993 Ser A ................................................  5.50     02/01/11      10,051,300 
      4,000  Clark County, Nevada, Transportation Ser 1992 A (AMBAC)  ........  6.50     06/01/17       4,518,640 
             New York City, New York, 
     10,000   1990 Ser D .....................................................  6.00     08/01/07      10,077,700 
     10,000   1990 Ser D .....................................................  6.00     08/01/08      10,053,900 
     10,000  Pennsylvania, First Ser 1995 (FGIC) .............................  5.50     05/01/12      10,074,700 
      7,500  Shelby County, Tennessee, Refg 1995 Ser A  ......................  5.625    04/01/14       7,610,025 
     20,120  King County, Washington, Ltd Tax 1995 (MBIA) ....................  6.00     01/01/23      20,632,255 
- ------------                                                                                       -------------- 
    155,120                                                                                           135,341,900 
- ------------                                                                                       -------------- 
             Educational Facilities Revenue (5.4%) 
     10,000  Indiana University, Student Fee Ser K (MBIA) ....................  5.875    08/01/20      10,089,600 
      7,000  Massachusetts Health & Educational Facilities Authority, Boston 
              University Ser 1991 (MBIA) .....................................  6.66     10/01/31       7,524,650 
     15,000  New Hampshire Higher Educational & Health Facilities Authority, 
              Dartmouth College Ser 1993 .....................................  5.375    06/01/23      14,239,800 
      2,000  New Jersey Development Authority, The Seeing Eye Inc 1991 .......  7.30     04/01/11       2,100,380 
             New York State Dormitory Authority, 
      5,000   State University Ser 1989 B ....................................  0.00     05/15/02       3,879,350 
     20,000   State University Ser 1990 B ....................................  7.00     05/15/16      21,422,400 
      5,000  Vermont Educational & Health Buildings Financing Agency, 
              Middlebury College Ser 1996 ....................................  5.375    11/01/26       4,795,450 
- ------------                                                                                       -------------- 
     64,000                                                                                            64,051,630 
- ------------                                                                                       -------------- 
             Electric Revenue (11.7%) 
     25,000  Salt River Project Agricultural Improvement & Power District, 
              Arizona, Refg 1993 Ser C .......................................  5.50     01/01/10      25,702,250 
     10,000  Sacramento Municipal Utility District, California, Refg 1994 Ser 
              I (MBIA) .......................................................  5.75     01/01/15      10,104,900 
     10,000  Municipal Electric Authority of Georgia, Fifth Crossover Ser ....  6.50     01/01/17      10,922,200 
      8,000  New York State Power Authority, General Purpose Ser CC ..........  5.25     01/01/18       7,581,200 
     15,000  Puerto Rico Electric Power Authority, Power Ser O ...............  0.00     07/01/17       4,599,750 
     15,000  South Carolina Public Service Authority, 1995 Refg Ser A 
              (AMBAC) ........................................................  6.25     01/01/22      15,957,600 
      6,000  Austin, Texas, Combined Utilities Refg Ser 1993 A ...............  5.75     11/15/13       6,019,320 
     24,000  San Antonio, Texas, Electric & Gas Refg Ser 1994 C ..............  4.70     02/01/06      23,072,160 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      37
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
             Intermountain Power Agency, Utah, 
$10,000       Refg 1996 Ser D ................................................  5.00 %   07/01/21  $    9,069,600 
 10,000       Refg 1997 Ser B (MBIA)(WI) .....................................  5.75     07/01/19       9,806,300 
 15,000      Washington Public Power System, Proj #2 Refg Ser 1994 A 
              (Secondary MBIA) ...............................................  6.00     07/01/07      16,061,850 
- ------------                                                                                       -------------- 
148,000                                                                                               138,897,130 
- ------------                                                                                       -------------- 
             Hospital Revenue (7.4%) 
 10,000      Birmingham-Carraway Special Care Facilities Financing 
              Authority, Alabama, Carraway Methodist Health Systems Ser 1995 
              A (Connie Lee) .................................................  6.25     08/15/09      10,808,000 
  3,000      Baxter County, Arkansas, Baxter County Regional Hospital Inc 
              Impr & Refg Ser 1992 ...........................................  7.50     09/01/21       3,216,660 
 10,000      California Health Facilities Financing Authority, Kaiser 
              Permanente Ser 1985 ............................................  5.55     08/15/25       9,544,900 
  1,500      Massachusetts Health & Educational Facilities Authority, Malden 
              Hospital - FHA Ins Mtge Ser A ..................................  5.00     08/01/16       1,343,580 
             Rochester, Minnesota, 
  5,000       Mayo Foundation/Mayo Medical Center Ser 1992 I .................  5.75     11/15/21       4,999,600 
  3,700       Mayo Foundation/Mayo Medical Center Ser 1992 F .................  6.25     11/15/21       3,870,274 
 10,000      Missouri Health & Educational Facilities Authority, 
              Barnes-Jewish Inc/Christian Health Services Ser 1993 A .........  5.25     05/15/14       9,581,600 
  6,000      New York State Medical Care Facilities Finance Agency, 
              Presbyterian Hospital-FHA Ins Mtge 1984 Ser A Refg .............  5.25     08/15/14       5,779,320 
 10,000      Charlotte-Mecklenburg County Hospital Authority, North Carolina, 
              Ser 1992 .......................................................  6.00     01/01/22      10,136,700 
  5,000      University of North Carolina, Hospitals at Chapel Hill Ser 1996 .  5.00     02/15/29       4,486,600 
  4,000      Cuyahoga County, Ohio, The Cleveland Clinic Foundation Refg Ser 
              1988 A .........................................................  8.00     12/01/15       4,156,680 
  5,000      North Central Texas Health Facilities Development Corporation, 
              University Medical Center Inc Ser 1997 (FSA)(WI) ...............  5.45     04/01/15       4,889,900 
  7,000      Fairfax County Industrial Development Authority, Virginia, Inova 
              Health System Foundation Refg Ser 1993 A .......................  5.25     08/15/19       6,601,840 
 10,000      Fredericksburg Industrial Development Authority, Virginia, 
              Medicorp Health System Refg Ser 1996 (AMBAC) ...................  5.25     06/15/16       9,634,000 
- ------------                                                                                       -------------- 
 90,200                                                                                                89,049,654 
- ------------                                                                                       -------------- 
             Industrial Development/Pollution Control Revenue (6.7%) 
  1,300      Jefferson County, Kentucky, Louisville Gas & Electric Co 1993 
              Ser B ..........................................................  5.625    08/15/19       1,289,223 
  1,450      Maryland Industrial Development Financing Authority, Medical 
              Waste Assocs LP 1989 Ser (AMT) .................................  8.75     11/15/10       1,450,000 
  5,000      Becker, Minnesota, Northern States Power Co Ser A 1989 ..........  6.80     04/01/07       5,300,250 
 15,000      Claiborne County, Mississippi, Middle South Energy Inc Ser C  ...  9.875    12/01/14      16,619,100 
 10,000      Clark County, Nevada, Nevada Power Co Ser 1992 A (AMT) (FGIC) ...  6.70     06/01/22      10,757,700 
 10,000      Washoe County, Nevada, Sierra Pacific Power Co Ser 1987 (AMBAC) .  6.30     12/01/14      10,585,600 
  5,000      Alliance Airport Authority, Texas, AMR Corp Ser 1990 (AMT) ......  7.50     12/01/29       5,355,400 
 10,000      Dallas-Fort Worth International Airport Facility Improvement 
              Corporation, Texas, American Airlines Inc Ser 1995 .............  6.00     11/01/14       9,923,400 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      38
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
$ 7,000      Matagorda County Navigation District #1, Texas, Central Power & 
              Light Co Collateralized Ser 1984 A .............................  7.50 %   12/15/14  $    7,718,830 
 10,000      Weston, Wisconsin, Wisconsin Public Service Corp Refg Ser 1993 
              A ..............................................................  6.90     02/01/13      10,991,400 
- ------------                                                                                       -------------- 
 74,750                                                                                                79,990,903 
- ------------                                                                                       -------------- 
             Mortgage Revenue-Multi-Family (2.1%) 
  7,000      Michigan Housing Development Authority, Rental Ser A (Bifurcated 
              FSA) ...........................................................  6.50     04/01/23       7,253,050 
  9,000      New Jersey Housing & Mortgage Finance Agency, 1995 Ser A 
              (AMBAC) ........................................................  6.05     11/01/20       9,179,190 
             New York City Housing Developement Corporation, New York, 
  4,514       Ruppert Proj-FHA Ins Sec 223F ..................................  6.50     11/15/18       4,637,092 
  4,371       Stevenson Commons Proj-FHA Ins Sec 223F ........................  6.50     05/15/18       4,463,777 
- ------------                                                                                       -------------- 
 24,885                                                                                                25,533,109 
- ------------                                                                                       -------------- 
             Mortgage Revenue-Single Family (6.7%) 
 10,000      Alaska Housing Finance Corporation, Governmental 1995 Ser A 
              (MBIA) .........................................................  5.875    12/01/24       9,965,400 
  2,440      California Housing Finance Agency, Home Cap Apprec 1983 Ser B  ..  0.00     08/01/15         381,372 
 12,100      Illinois Housing Development Authority, Residential 1991 Ser C 
              (AMT) ..........................................................  6.875    02/01/18      12,554,355 
  4,000      Missouri Housing Development Commission, Homeownership GNMA/FNMA 
              1996 Ser C (AMT) ...............................................  7.45     09/01/27       4,419,760 
  6,900      Nebraska Investment Finance Authority, GNMA-Backed 1990 Ser 
              (AMT) ..........................................................  7.631    09/10/30       7,305,306 
  4,010      North Carolina Housing Finance Agency, Ser Q (AMT) ..............  8.00     03/01/18       4,275,783 
  6,950      Ohio Housing Finance Agency, GNMA-Backed 1990 Ser A (AMT) .......  6.903    03/01/31       7,285,824 
 10,000      Pennsylvania Housing Finance Agency, Ser 1991-31 (AMT) ..........  7.00     10/01/23      10,541,100 
             Tennessee Housing Development Agency, 
  4,000       Mortgage Finance 1993 Ser A ....................................  5.90     07/01/18       4,031,880 
 11,000       Mortgage Finance 1993 Ser A ....................................  5.95     07/01/28      11,065,560 
  7,600      Wisconsin Housing & Economic Development Authority, Home 
              Ownership 1991 Ser (AMT) .......................................  7.097    10/25/22       7,965,864 
- ------------                                                                                       -------------- 
 79,000                                                                                                79,792,204 
- ------------                                                                                       -------------- 
             Public Facilities Revenue (2.3%) 
  5,000      Palm Beach County, Florida, Criminal Justice Ser 1990 (FGIC) ....  6.00     06/01/13       5,092,200 
 10,000      Michigan Building Authority, 1993 Refg Ser I (AMBAC) ............  5.30     10/01/16       9,494,500 
  6,000      Saint Louis Industrial Development Authority, Missouri, Kiel 
              Center Refg Ser 1992 (AMT) .....................................  7.75     12/01/13       6,423,540 
  5,000      Ohio Building Authority, Correctional 1985 Ser C BIGS ...........  9.75     10/01/05       6,619,750 
- ------------                                                                                       -------------- 
 26,000                                                                                                27,629,990 
- ------------                                                                                       -------------- 
             Resource Recovery Revenue (5.8%) 
             Connecticut Resources Recovery Authority, 
  9,000       American REF-FUEL Co of Southeastern Connecticut 1988 Ser A 
              (AMT) ..........................................................  8.00     11/15/15       9,720,540 
  4,950       Bridgeport RESCO Ser A .........................................  7.625    01/01/09       5,107,707 
  7,000      Savannah Resource Recovery Development Authority, Georgia, 
              Savannah Energy Systems Co Ser 1992 ............................  6.30     12/01/06       7,385,210 
 10,000      Northeast Maryland Waste Disposal Authority, Montgomery County 
              Ser 1993 A (AMT) ...............................................  6.30     07/01/16      10,197,500 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      39
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
$ 9,000      Mercer County Improvement Authority, New Jersey, Refg Ser A 1992 
              (AMT)(FGIC) ....................................................  6.70 %   04/01/13  $    9,009,990 
 10,000      Hempstead Industrial Development Agency, New York, 1985 American 
              REF-FUEL Co of Hempstead .......................................  7.40     12/01/10      10,250,000 
  6,000      New York State Environmental Facilities Corporation, Huntington 
              1989 Ser A (AMT) ...............................................  7.50     10/01/12       6,344,220 
  5,000      Onondaga County Resource Recovery Agency, New York, 1992 Ser 
              (AMT) ..........................................................  6.875    05/01/06       5,219,800 
  5,000      Fairfax County Economic Development Authority, Virginia, Ogden 
              Martin Systems of Fairfax Inc Ser 1988 A (AMT) .................  7.75     02/01/11       5,387,800 
- ------------                                                                                       -------------- 
 65,950                                                                                                68,622,767 
- ------------                                                                                       -------------- 
             Transportation Facilities Revenue (12.5%) 
  8,965      Mid-Bay Bridge Authority, Florida, Sr Lien Crossover Refg Ser 
              1993 A .........................................................  6.00     10/01/13       8,954,601 
             Atlanta, Georgia, 
  5,000       Airport Refg Ser 1996 (AMBAC)  .................................  6.00     01/01/07       5,393,800 
 10,000       Airport Ser 1990 (AMT) .........................................  6.25     01/01/21      10,281,300 
  8,100      Metropolitan Atlanta Rapid Transit Authority, Georgia, Sales Tax 
              Refg Ser K .....................................................  7.25     07/01/10       8,574,822 
  5,000      Hawaii, Airports Second Ser 1991 (AMT) ..........................  7.00     07/01/18       5,365,450 
             Kentucky Turnpike Authority, 
  9,000       Economic Development Road Refg Ser 1995 (AMBAC) ................  6.50     07/01/08      10,153,080 
 30,000       Resource Recovery Road Refg 1987 Ser A  ........................  5.00     07/01/08      29,232,300 
 11,000      New Jersey Highway Authority, Sr Parkway Refg 1992 Ser ..........  6.25     01/01/14      11,532,510 
  6,595      Albuquerque, New Mexico, Airport Refg Ser 1997 (AMT)(AMBAC) 
              (WI) ...........................................................  6.375    07/01/15       6,955,878 
             Ohio Turnpike Commission, 
  4,000       1994 Ser A  ....................................................  5.75     02/15/24       3,988,800 
 20,000       1996 Ser A (MBIA) ..............................................  5.50     02/15/26      19,656,600 
  5,000      Pennsylvania Turnpike Commission, Ser L of 1991 (MBIA) ..........  6.00     06/01/15       5,141,500 
 10,000      Puerto Rico Highway & Transportation Authority, Refg Ser X ......  5.50     07/01/15       9,931,200 
 10,000      Texas Turnpike Authority, Dallas North Tollway Refg Ser 1997 
              (FGIC) .........................................................  5.25     01/01/23       9,550,000 
  4,000      Virginia Transportation Board, US Route 58 Corridor Ser 1993 B ..  5.625    05/15/13       4,008,960 
- ------------                                                                                       -------------- 
146,660                                                                                               148,720,801 
- ------------                                                                                       -------------- 
             Water & Sewer Revenue (9.7%) 
 10,000      Birmingham Water Works & Sewer Board, Alabama, Ser 1994 .........  5.50     01/01/20       9,935,500 
 10,000      Phoenix Civic Improvement Corporation, Arizona, Jr Lien Water 
              Ser 1994 .......................................................  5.45     07/01/19       9,734,700 
 10,000      California Department of Water Resources, Central Valley Refg 
              Ser L  .........................................................  5.50     12/01/23       9,766,200 
 10,000      East Bay Municipal Utility District, California, Water Refg Ser 
              1993 (MBIA) ....................................................  5.00     06/01/21       9,131,900 
 10,000      Los Angeles, California, Wastewater Ser 1994-A (MBIA) ...........  5.875    06/01/24      10,198,600 
 10,000      Dade County, Florida, Water & Sewer Ser 1995 (FGIC) .............  5.50     10/01/25       9,814,900 
  5,000      Rockdale County Water & Sewerage Authority, Georgia, Ser 1996 
              (FSA) ..........................................................  5.00     07/01/22       4,659,400 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      40
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
             Massachusetts Water Resources Authority, 
 $ 10,000     Refg 1992 Ser B ................................................  5.50 %   11/01/15    $ 9,747,500
   10,000     1993 Ser C .....................................................  5.25     12/01/15      9,707,800
   10,000     1996 Ser A (FGIC) ..............................................  5.50     11/01/21      9,826,400
    4,000    Detroit, Michigan, Sewage Refg Ser 1993-A (FGIC) ................  5.70     07/01/13      4,040,240
    8,500    New York City Municipal Water Finance Authority, New York, 1994                         
              Ser B  .........................................................  5.30     06/15/06      8,592,055
   10,000    Philadelphia, Pennsylvania, Water & Wastewater Ser 1993 (FSA) ...  5.50     06/15/15      9,773,200
- ------------                                                                                       -------------- 
  117,500                                                                                            114,928,395
- ------------                                                                                       -------------- 
             Other Revenue (2.4%)                                                                    
    3,500    Denver, Colorado, Excise Tax Ser 1985 A .........................  5.00     11/01/08      3,414,320
             New York Local Government Assistance Corporation,                                       
    5,000     Ser 1993 C Refg ................................................  5.375    04/01/14      4,881,500
   10,000     Ser 1994 A  ....................................................  5.50     04/01/17      9,987,000
    5,000     Ser 1995 A  ....................................................  6.00     04/01/24      5,106,900
    5,000    Houston, Texas, Sr Lien Hotel Occupancy Tax Refg Ser 1995 (FSA) .  5.50     07/01/11      5,011,000
- ------------                                                                                       -------------- 
   28,500                                                                                             28,400,720
- ------------                                                                                       -------------- 
             Refunded (10.4%)                                                                      
    5,000    Central Coast Water Authority, California, Ser 1992 (AMBAC) .....  6.60     10/01/02++    5,647,550 
    9,000    Los Angeles Convention & Exhibition Center Authority, 
              California, Ser 1985 COPs ......................................  9.00     12/01/05++   11,869,290 
    6,000    Connecticut Health & Educational Facilities Authority, Yale-New 
              Haven Hospital Ser F (MBIA) ....................................  7.10     07/01/00++    6,633,600 
    2,500    Mid-Bay Bridge Authority, Florida, Ser 1991 A (ETM) .............  6.875    10/01/22      2,854,200 
    9,790    Metropolitan Pier & Exposition Authority, Illinois, McCormick   
              Place Ser 1992 A ...............................................  6.50     06/15/03++   10,994,366 
    8,000    Massachusetts, 1994 Ser C (FGIC) ................................  6.75     11/01/04++    9,164,640 
   14,000    New York State Dormitory Authority, Suffolk County Judicial Ser 
              1986 (ETM) .....................................................  7.375    07/01/16     16,952,460 
   25,000    Intermountain Power Agency, Utah, Refg 1985 Ser H (GAINS) .......  0.00 +   07/01/03++   24,159,500 
    5,000    Salt Lake City, Utah, IHC Hospital Inc Ser of 1983 (ETM) ........  5.00     06/01/15      4,835,050 
   28,000    Fairfax County Industrial Development Authority, Virginia, 
              Fairfax Hospital System Inc/Inova Health Ser 1991 ..............  6.801    08/15/01++   30,990,680 
- ------------                                                                                       -------------- 
  112,290                                                                                            124,101,336 
- ------------                                                                                       -------------- 
1,132,855    TOTAL TAX-EXEMPT MUNICIPAL BONDS 
             (Identified Cost $1,051,723,235) .................................................... 1,125,060,539 
- ------------                                                                                       -------------- 
             SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (6.1%) 
    9,700    Dade County Health Facilities Authority, Florida, Miami 
              Childrens Hospital Ser 1990 (Demand 01/02/97)  .................  5.05 *   09/01/20      9,700,000 
   13,900    Hapeville Development Authority, Georgia, Hapeville Hotel Ltd                            
              Ser 1985 (Demand 01/02/97) .....................................  5.00 *   11/01/15     13,900,000 
    8,700    University of Michigan, Hospital Ser 1995 A (Demand 01/02/97) ...  5.10 *   12/01/19      8,700,000 
                                                                                                    
                       SEE NOTES TO FINANCIAL STATEMENTS

                               41           
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
  $ 18,900   Missouri Health & Educational Facilities Authority, Washington 
              University Ser 1996 D (Demand 01/02/97) ........................  4.75*%   02/01/30     $18,900,000 
     9,000   North Central Texas Health Facilities Development Corporation, 
              University Medical Center Inc Ser 1987 .........................  7.75     04/01/97++     9,294,570 
    11,600   Kemmerer, Wyoming, Exxon Corp Ser 1984 (Demand 01/02/97) ........  5.10*    11/01/14      11,600,000 
- ------------                                                                                       -------------- 
    71,800   TOTAL SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS 
- ------------ 
             (Identified Cost $71,447,050) ........................................................    72,094,570 
                                                                                                   -------------- 
$1,204,655   TOTAL INVESTMENTS (Identified Cost $1,123,170,285) (a) ...................   100.6%    1,197,155,109 
============ 
             LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS ...........................   (0.6)        (7,121,119) 
                                                                                       ----------- -------------- 
             NET ASSETS ...............................................................   100.0%   $1,190,033,990 
                                                                                       =========== ============== 
</TABLE>

- ------------ 
AMT         Alternative Minimum Tax. 
BIGS        Bond Income Growth Security. 
COPs        Certificates of Participation. 
ETM         Escrowed to Maturity. 
GAINS       Growth and Income Security. 
WI          Security purchased on a when issued basis. 
+           Zero coupon; will convert to 10.00% on July 1, 2000. 
++          Prerefunded to call date shown. 
*           Current coupon of variable rate security. 
(a)         The aggregate cost for federal income tax purposes approximates 
            identified cost. The aggregate gross unrealized appreciation is 
            $77,142,347 and the aggregate gross unrealized depreciation is 
            $3,157,523, resulting in net unrealized appreciation of 
            $73,984,824. 

Bond Insurance: 
- --------------- 
AMBAC       AMBAC Indemnity Corporation. 
Connie Lee  Connie Lee Insurance Company. 
FGIC        Financial Guaranty Insurance Company. 
FSA         Financial Security Assurance Company. 
MBIA        Municipal Bond Investors Assurance Corporation. 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      42
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
PORTFOLIO OF INVESTMENTS December 31, 1996, continued 

                      GEOGRAPHIC SUMMARY OF INVESTMENTS 
               Based on Market Value as a Percent of Net Assets
                               December 31, 1996

<TABLE>
<CAPTION>
<S>                <C>
Alabama             1.7% 
Alaska              4.1 
Arizona             3.0 
Arkansas            0.3 
California          5.6 
Colorado            0.3 
Connecticut         2.0 
Florida             3.1 
Georgia             5.1 
Hawaii              0.4 
Illinois            2.0 
Indiana             0.8 
Kentucky            3.4 
Maryland            1.0% 
Massachusetts       6.6 
Michigan            2.5 
Minnesota           1.2 
Mississippi         1.4 
Missouri            3.3 
Nebraska            0.6 
Nevada              2.2 
New Hampshire       1.2 
New Jersey          2.7 
New Mexico          0.6 
New York           11.4 
North Carolina      1.6 
Ohio                3.5% 
Pennsylvania        3.0 
Puerto Rico         1.2 
South Carolina      1.3 
Tennessee           1.9 
Texas               6.8 
Utah                4.0 
Vermont             0.4 
Virginia            4.7 
Washington          3.1 
Wisconsin           1.6 
Wyoming             1.0 
                  -----
Total             100.6% 
                  =====
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      43
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS 

STATEMENTS OF ASSETS AND LIABILITIES 
December 31, 1996 

<TABLE>
<CAPTION>
<S>                                                                    <C>
ASSETS: 
Investments in securities, at value 
 (identified cost $1,123,170,285) ..................................... $1,197,155,109 
Cash ..................................................................        887,063 
Receivable for: 
  Interest ............................................................     17,424,216 
  Shares of beneficial interest sold ..................................        244,066 
Prepaid expenses and other assets .....................................         27,394 
                                                                        -------------- 
  TOTAL ASSETS ........................................................  1,215,737,848 
                                                                        -------------- 
LIABILITIES: 
Payable for: 
  Investments purchased ...............................................     20,777,892 
  Dividends and distributions .........................................      3,724,283 
  Shares of beneficial interest repurchased ...........................        596,522 
  Investment management fee ...........................................        452,931 
Accrued expenses ......................................................        152,230 
                                                                        -------------- 
  TOTAL LIABILITIES ...................................................     25,703,858 
                                                                        -------------- 
NET ASSETS: 
Paid-in-capital .......................................................  1,115,886,458 
Net unrealized appreciation ...........................................     73,984,824 
Accumulated undistributed net realized gain ...........................        162,708 
                                                                        -------------- 
  NET ASSETS .......................................................... $1,190,033,990 
                                                                        ============== 
NET ASSET VALUE PER SHARE, 
 101,083,561 shares outstanding (unlimited shares authorized of $.01 
 par value) ........................................................... $        11.77 
                                                                        ============== 
MAXIMUM OFFERING PRICE PER SHARE 
 (net asset value plus 4.17% of net asset value)* ..................... $        12.26 
                                                                        ============== 
</TABLE>

- ------------ 
*  On sales of $25,000 or more the offering price is reduced. 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      44
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS, continued 

STATEMENT OF OPERATIONS 
For the year ended December 31, 1996 

<TABLE>
<CAPTION>
<S>                                        <C>
NET INVESTMENT INCOME: 
INTEREST INCOME ........................   $ 74,093,062 
                                           ------------
EXPENSES 
Investment management fee ..............      5,320,578 
Transfer agent fees and expenses  ......        387,764 
Shareholder reports and notices  .......         62,672 
Custodian fees .........................         52,615 
Professional fees ......................         52,404 
Registration fees ......................         46,458 
Trustees' fees and expenses ............         15,285 
Other ..................................         30,574 
                                           ------------
  TOTAL EXPENSES .......................      5,968,350 
  LESS: EXPENSE OFFSET  ................        (40,849) 
                                           ------------
  NET EXPENSES .........................      5,927,501 
                                           ------------
  NET INVESTMENT INCOME ................     68,165,561 
                                           ------------
NET REALIZED AND UNREALIZED GAIN 
 (LOSS): 
Net realized gain ......................      2,959,135 
Net change in unrealized appreciation  .    (29,830,436) 
                                           ------------
  NET LOSS .............................    (26,871,301) 
                                           ------------
NET INCREASE ...........................   $ 41,294,260 
                                           ============
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      45
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL STATEMENTS, continued 

STATEMENT OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                          FOR THE YEAR      FOR THE YEAR 
                                                              ENDED             ENDED 
                                                        DECEMBER 31, 1996 DECEMBER 31, 1995 
- --------------------------------------------------------------------------------------------
<S>                                                        <C>               <C>
INCREASE (DECREASE) IN NET ASSETS: 
OPERATIONS: 
Net investment income .................................    $   68,165,561    $   76,135,601 
Net realized gain .....................................         2,959,135        17,721,238 
Net change in unrealized appreciation/depreciation  ...       (29,830,436)      117,785,387 
                                                           --------------    -------------- 
  NET INCREASE.........................................        41,294,260       211,642,226 
                                                           --------------    -------------- 
DIVIDENDS AND DISTRIBUTIONS FROM: 
Net investment income .................................       (68,543,874)      (75,983,289) 
Net realized gain .....................................        (8,374,759)      (12,426,304) 
                                                           --------------    -------------- 
  TOTAL ...............................................       (76,918,633)      (88,409,593) 
                                                           --------------    -------------- 
Net decrease from transactions in shares of beneficial 
 interest .............................................       (99,650,138)      (93,207,593) 
                                                           --------------    -------------- 
  NET INCREASE (DECREASE) .............................      (135,274,511)       30,025,040 
NET ASSETS: 
Beginning of period ...................................     1,325,308,501     1,295,283,461 
                                                           --------------    -------------- 
  END OF PERIOD 
  (Including undistributed net investment income of 
  $0 and $378,313, respectively) ......................    $1,190,033,990    $1,325,308,501 
                                                           ==============    ==============
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      46
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS December 31, 1996 

1. ORGANIZATION AND ACCOUNTING POLICIES 

Dean Witter Tax-Exempt Securities Trust (the "Fund") is registered under the 
Investment Company Act of 1940, as amended, as a diversified, open-end 
management investment company. The Fund's investment objective is to provide 
a high level of current income which is exempt from federal income tax, 
consistent with the preservation of capital. The Fund was incorporated in 
Maryland in 1979, commenced operations on March 27, 1980 and reorganized as a 
Massachusetts business trust on April 30, 1987. 

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 -- Portfolio securities are valued for the Fund 
by an outside independent pricing service approved by the Trustees. The 
pricing service has informed the Fund that in valuing the Fund's portfolio 
securities, it uses both a computerized matrix of tax-exempt securities and 
evaluations by its staff, in each case based on information concerning market 
transactions and quotations from dealers which reflect the bid side of the 
market each day. The Fund's portfolio securities are thus valued by reference 
to a combination of transactions and quotations for the same or other 
securities believed to be comparable in quality, coupon, maturity, type of 
issue, call provisions, trading characteristics and other features deemed to 
be relevant. 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 by the identified cost 
method. The Fund amortizes premiums and accretes discounts over the life of 
the respective securities. Interest income is accrued daily. 

C. 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 and nontaxable income to its 
shareholders. Accordingly, no federal income tax provision is required. 

D. 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 

                                      47
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS December 31, 1996, continued 

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 
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 with Dean Witter InterCapital 
Inc. (the "Investment Manager"), the Fund pays the Investment Manager a 
management fee, accrued daily and payable monthly, by applying the following 
annual rates to the Fund's net assets determined as of the close of each 
business day: 0.50% to the portion of daily net assets not exceeding $500 
million; 0.425% to the portion of daily net assets exceeding $500 million but 
not exceeding $750 million; 0.375% to the portion of daily net assets 
exceeding $750 million but not exceeding $1 billion; 0.35% to the portion of 
daily net assets exceeding $1 billion but not exceeding $1.25 billion; and 
0.325% to the portion of daily net assets exceeding $1.25 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. 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 December 31, 1996 
aggregated $215,642,138 and $383,666,566, respectively. 

Dean Witter Trust Company, an affiliate of the Investment Manager, is the 
Fund's transfer agent. At December 31, 1996, the Fund had transfer agent fees 
and expenses payable of approximately $52,400. 

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 

                                      48
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
NOTES TO FINANCIAL STATEMENTS December 31, 1996, continued 

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 December 31, 1996 included in Trustees' fees and expenses 
in the Statement of Operations amounted to $837. At December 31, 1996, the 
Fund had an accrued pension liability of $48,696 which is included in accrued 
expenses in the Statement of Assets and Liabilities. 

Shares of the Fund are distributed by Dean Witter Distributors Inc. (the 
"Distributor"), an affiliate of the Investment Manager. The Distributor has 
informed the Fund that for the year ended December 31, 1996, it received 
approximately $1,050,000 in commissions from the sale of the Fund's shares. 
Such commissions are not an expense of the Fund; they are deducted from the 
proceeds of the shares. 

4. SHARES OF BENEFICIAL INTEREST 

Transactions in shares of beneficial interest were as follows: 

<TABLE>
<CAPTION>
                                                      FOR THE YEAR                   FOR THE YEAR 
                                                         ENDED                          ENDED 
                                                   DECEMBER 31, 1996              DECEMBER 31, 1995 
                                            ------------------------------ ------------------------------ 
                                                 SHARES         AMOUNT          SHARES         AMOUNT 
                                            -------------- --------------- -------------- --------------- 
<S>                                         <C>            <C>             <C>            <C>
Sold                                            3,179,464    $  37,259,996     3,469,058    $  40,446,608 
Reinvestment of dividends and distributions     3,684,669       43,078,883     4,260,271       50,182,467 
                                            -------------- --------------- -------------- --------------- 
                                                6,864,133       80,338,879     7,729,329       90,629,075 
Repurchased                                   (15,389,992)    (179,989,017)  (15,722,604)    (183,836,668) 
                                            -------------- --------------- -------------- --------------- 
Net decrease                                   (8,525,859)   $ (99,650,138)   (7,993,275)   $ (93,207,593) 
                                            ============== =============== ============== =============== 
</TABLE>

5. FEDERAL INCOME TAX STATUS 

Capital losses incurred after October 31 ("post-October" losses) within the 
taxable year are deemed to arise on the first business day of the Fund's next 
taxable year. The Fund incurred and will elect to defer net capital losses of 
approximately $146,000 during fiscal 1996. 

As of December 31, 1996, the Fund had temporary book/tax differences 
primarily attributable to post-October losses. 
 

                                      49
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
FINANCIAL HIGHLIGHTS 

Selected ratios and per share data for a share of beneficial interest 
outstanding throughout each period: 

<TABLE>
<CAPTION>
                                   FOR THE YEAR ENDED DECEMBER 31, 
                           --------------------------------------------- 
                              1996     1995     1994      1993     1992 
- ------------------------------------------------------------------------ 
<S>                        <C>      <C>      <C>       <C>      <C>
PER SHARE 
 OPERATING PERFORMANCE: 
Net asset value, 
 beginning of period ......  $12.09   $11.01   $12.41    $11.88   $11.65 
                           -------- -------- --------- -------- -------- 
Net investment income  ....    0.65     0.67     0.70      0.77     0.79 
Net realized and 
 unrealized gain (loss)  ..   (0.24)    1.19    (1.37)     0.54     0.23 
                           -------- -------- --------- -------- -------- 
Total from investment 
  operations ..............    0.41     1.86    (0.67)     1.31     1.02 
                           -------- -------- --------- -------- -------- 
Less dividends and 
 distributions from: 
 Net investment income  ...   (0.65)   (0.67)   (0.70)    (0.77)   (0.79) 
 Net realized gain ........   (0.08)   (0.11)   (0.03)    (0.01)    -- 
                           -------- -------- --------- -------- -------- 
Total dividends and 
  distributions ...........   (0.73)   (0.78)   (0.73)    (0.78)   (0.79) 
                           -------- -------- --------- -------- -------- 
Net asset value, 
 end of period ............  $11.77   $12.09   $11.01    $12.41   $11.88 
                           ======== ======== ========= ======== ======== 
TOTAL INVESTMENT RETURN+       3.61%   17.37%   (5.55)%   11.23%    9.09% 
RATIOS TO 
 AVERAGE NET ASSETS: 
Expenses ..................    0.48%    0.48%    0.47%     0.47%    0.49% 
Net investment income .....    5.52%    5.76%    6.02%     6.23%    6.74% 
SUPPLEMENTAL DATA: 
Net assets, end of period, 
  in millions .............  $1,190   $1,325   $1,295    $1,582   $1,323 
Portfolio turnover rate  ..      18%      21%      16%       13%       4% 
</TABLE>

                    (RESTUBBED TABLE CONTINUED FROM ABOVE) 

<TABLE>
<CAPTION>
                              1991     1990     1989     1988     1987 
- ------------------------------------------------------------------------ 
<S>                        <C>      <C>      <C>      <C>      <C>
PER SHARE 
 OPERATING PERFORMANCE: 
Net asset value, 
 beginning of period ......  $11.09   $11.28   $10.96   $10.45   $11.50 
                           -------- -------- -------- -------- --------- 
Net investment income  ....    0.80     0.80     0.81     0.81     0.80 
Net realized and 
 unrealized gain (loss)  ..    0.56    (0.18)    0.32     0.51    (0.97) 
                           -------- -------- -------- -------- --------- 
Total from investment 
  operations ..............    1.36     0.62     1.13     1.32    (0.17) 
                           -------- -------- -------- -------- --------- 
Less dividends and 
 distributions from: 
 Net investment income  ...   (0.80)   (0.81)   (0.81)   (0.81)   (0.83) 
 Net realized gain ........    --       --       --       --      (0.05) 
                           -------- -------- -------- -------- --------- 
Total dividends and 
  distributions ...........   (0.80)   (0.81)   (0.81)   (0.81)   (0.88) 
                           -------- -------- -------- -------- --------- 
Net asset value, 
 end of period ............  $11.65   $11.09   $11.28   $10.96   $10.45 
                           ======== ======== ======== ======== ========= 
TOTAL INVESTMENT RETURN+      12.71%    5.86%   10.61%   13.02%   (1.44)% 
RATIOS TO 
 AVERAGE NET ASSETS: 
Expenses ..................    0.51%    0.51%    0.51%    0.54%    0.52% 
Net investment income .....    7.05%    7.25%    7.31%    7.51%    7.42% 
SUPPLEMENTAL DATA: 
Net assets, end of period, 
  in millions .............  $1,145   $1,010   $1,033    $908      $896 
Portfolio turnover rate  ..      10%      19%      13%      17%      37% 
</TABLE>

- ------------ 
+ Does not reflect the deduction of sales load. Calculated based on the net 
asset value as of the last business day of the period. 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      50
<PAGE>

DEAN WITTER TAX-EXEMPT SECURITIES TRUST 
REPORT OF INDEPENDENT ACCOUNTANTS 

TO THE SHAREHOLDERS AND TRUSTEES 
OF DEAN WITTER TAX-EXEMPT SECURITIES TRUST 

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 Dean Witter 
Tax-Exempt Securities Trust (the "Fund") at December 31, 1996, 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 ten years in the period then ended, 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 
December 31, 1996 by correspondence with the custodian and brokers, provide a 
reasonable basis for the opinion expressed above. 

PRICE WATERHOUSE LLP 
1177 Avenue of the Americas 
New York, New York 10036 
February 10, 1997 

- ----------------------------------------------------------------------------- 
                     1996 FEDERAL TAX NOTICE (unaudited) 

       During the year ended December 31, 1996, the Fund paid to the 
       shareholders $0.65 per share from net investment income. All of the 
       Fund's dividends from net investment income were exempt interest 
       dividends, excludable from gross income for Federal income tax 
       purposes. For the year ended December 31, 1996, the Fund paid to 
       shareholders $0.08 per share from long-term capital gains. 
- ----------------------------------------------------------------------------- 

<PAGE>

APPENDIX 

RATINGS OF INVESTMENTS 
- ----------------------------------------------------------------------------- 

Moody's Investors Service Inc. ("Moody's") 

                            MUNICIPAL BOND RATINGS 

<TABLE>
<CAPTION>
<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 a 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>

   Conditional Rating: Bonds for which the security depends upon the 
completion of some act or the fulfillment of some condition are rated 
conditionally. These bonds are secured by (a) earnings of projects under 
construction, (b) earnings of projects unseasoned in operation experience, 
(c) rentals which begin when facilities are completed or (d) payments to 
which some other limiting condition attaches. Parenthetical rating denotes 
probable credit stature upon completion of construction or elimination of 
basis of condition. 

                                      52
<PAGE>

   Rating Refinements: Moody's may apply numerical modifiers, 1, 2, and 3 in 
each generic rating classification from Aa though 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. 

                            MUNICIPAL NOTE RATINGS 

   Moody's ratings for state and municipal note and other short-term loans 
are designated Moody's Investment Grade (MIG). MIG 1 denotes best quality and 
means there is present strong protection from established cash flows, 
superior liquidity support or demonstrated broad-based access to the market 
for refinancing. MIG 2 denotes high quality and means that margins of 
protection are ample although not as large as in MIG 1. MIG 3 denotes 
favorable quality and means that all security elements are accounted for but 
that the undeniable strength of the previous grades, MIG 1 and MIG 2, is 
lacking. MIG 4 denotes adequate quality and means that the protection 
commonly regarded as required of an investment security is present and that 
while the notes are not distinctly or predominantly speculative, there is 
specific risk. 

                       VARIABLE RATE DEMAND OBLIGATIONS 

   A short-term rating, in addition to the Bond or MIG ratings, designated 
VMIG may also be assigned to an issue having a demand feature. The assignment 
of the VMIG symbol reflects such characteristics as payment upon periodic 
demand rather than fixed maturity dates and payment relying on external 
liquidity. The VMIG rating criteria are identical to the MIG criteria 
discussed above. 

                           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. These ratings apply to Municipal Commercial Paper as well as 
taxable Commercial Paper. Moody's employs the following three 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 categories. 

STANDARD & POOR'S CORPORATION ("STANDARD & POOR'S") 

                            MUNICIPAL BOND RATINGS 

   A Standard & Poor's municipal 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. 

                                      53
<PAGE>

<TABLE>
<CAPTION>
<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 eibits 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 
        would 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. 

C       The rating "C" is typically applied to debt subordinated to senior debt which is assigned an actual or implied 
        "CCC-" debt rating. 

Cl      The rating "Cl" is reserved for income bonds on which no interest is being paid. 

D       Debt rated "D" is in payment default. The 'D' rating category is used when interest payments or principal 
        payments are not made on the date due even if the applicable grace period has not expired, unless S&P believes 
        that such payments will be made during such grace period. The 'D' rating also will be used upon the filing 
        of a bankruptcy petition if debt service payments are jeopardized. 

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 ratings 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. 

                                      54
<PAGE>

        The foregoing ratings are sometimes followed by a "p" which indicates that the rating is provisional. A provisional 
        rating assumes the successful completion of the project being financed by the bonds being rated and indicates 
        that payment of debt service requirements is largely or entirely dependent upon the successful and timely 
        completion of the project. This rating, however, while addressing credit quality subsequent to completion 
        of the project, makes no comment on the likelihood or risk of default upon failure of such completion. 
</TABLE>

                            MUNICIPAL NOTE RATINGS 

   Commencing on July 27, 1984, Standard & Poor's instituted a new rating 
category with respect to certain municipal note issues with a maturity of 
less than three years. The new note ratings denote the following: 

     SP-1 denotes a very strong or strong capacity to pay principal and 
    interest. Issues determined to possess overwhelming safety characteristics 
    are given a plus (+) designation (SP-1+). 

     SP-2 denotes a satisfactory capacity to pay principal and interest. 

     SP-3 denotes a speculative capacity to pay principal and interest. 

                           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 S&P 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. 

     A-1 indicates that the degree of safety regarding timely payments 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. 

                                      55
<PAGE>

STATEMENT OF ADDITIONAL INFORMATION                         DEAN WITTER  
NOVEMBER 26, 1996                                           NATIONAL 
                                                            MUNICIPAL 
                                                            TRUST 
- ----------------------------------------------------------------------------- 

   Dean Witter National Municipal Trust (the "Fund") is an open-end 
diversified management investment company whose investment objective is to 
provide a high level of current income exempt from federal income tax, 
consistent with the preservation of capital. The Fund invests principally in 
tax-exempt fixed-income securities which are rated in the three highest 
categories by Moody's Investors Service, Inc. or Standard & Poor's 
Corporation. (See "Investment Practices and Policies.") 

   A Prospectus for the Fund dated November 26, 1996, which provides the 
basic information you should know before investing in the Fund, may be 
obtained without charge from the Fund at its address or telephone numbers 
listed below or from the Fund's Distributor, 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. 

Dean Witter 
National Municipal Trust 
Two World Trade Center 
New York, New York 10048 
(212) 392-2550 or 
(800) 869-NEWS (toll-free) 

<PAGE>

TABLE OF CONTENTS 
- ----------------------------------------------------------------------------- 


<TABLE>
<CAPTION>
<S>                                        <C>
The Fund and its Management..............   3 
Trustees and Officers....................   6 
Investment Practices and Policies .......  11 
Investment Restrictions..................  17 
Portfolio Transactions and Brokerage ....  19 
The Distributor .........................  20 
Determination of Net Asset Value  .......  23 
Shareholder Services.....................  24 
Redemptions and Repurchases..............  28 
Dividends, Distributions and Taxes ......  31 
Performance Information..................  32 
Description of Shares ...................  33 
Custodian and Transfer Agent ............  34 
Independent Accountants..................  34 
Reports to Shareholders..................  35 
Legal Counsel............................  35 
Experts .................................  35 
Registration Statement...................  35 
Financial Statements--September 30, 
 1996....................................  36 
Report of Independent Accountants .......  47 
Appendix.................................  48 
</TABLE>

                                       2
<PAGE>

THE FUND AND ITS MANAGEMENT 
- ----------------------------------------------------------------------------- 

THE FUND 

   The Fund was organized as a Massachusetts business trust on March 29, 
1994. 

THE INVESTMENT MANAGER 

   Dean Witter InterCapital Inc. (the "Investment Manager" or 
"InterCapital"), whose address is Two World Trade Center, New York, New York 
10048, is the Fund's Investment Manager. InterCapital is a wholly-owned 
subsidiary of Dean Witter, Discover & Co. ("DWDC"), a Delaware corporation. 
In an internal reorganization which took place in January, 1993, InterCapital 
assumed the investment advisory, administrative and management activities 
previously performed by the InterCapital Division of Dean Witter Reynolds 
Inc. ("DWR"), a broker-dealer affiliate of InterCapital. (As hereinafter used 
in this Statement of Additional Information, the terms "InterCapital" and 
"Investment Manager" refer to DWR's InterCapital Division prior to the 
internal reorganization and to Dean Witter InterCapital Inc. thereafter.) The 
daily management of the Fund and research relating to the Fund's portfolio is 
conducted by or under the direction of officers of the Fund and of the 
Investment Manager, subject to periodic review by the Fund's Board of 
Trustees. In addition, Trustees of the Fund provide guidance on economic 
factors and interest rate trends. Information as to these trustees and 
officers is contained under the caption "Trustees and Officers." 

   InterCapital is also the investment manager or investment adviser of the 
following investment companies: Dean Witter Liquid Asset Fund Inc., 
InterCapital Income Securities Inc., Dean Witter High Yield Securities Inc., 
Dean Witter Tax-Free Daily Income Trust, Dean Witter Developing Growth 
Securities Trust, Dean Witter American Value Fund, Dean Witter Dividend 
Growth Securities Inc., Dean Witter Natural Resource Development Securities 
Inc., Dean Witter U.S. Government Money Market Trust, Dean Witter California 
Tax-Free Income Fund, Dean Witter Variable Investment Series, Dean Witter 
World Wide Investment Trust, Dean Witter Select Municipal Reinvestment Fund, 
Dean Witter U.S. Government Securities Trust, Dean Witter New York Tax-Free 
Income Fund, Dean Witter Convertible Securities Trust, Dean Witter Federal 
Securities Trust, Dean Witter Value-Added Market Series, High Income 
Advantage Trust, High Income Advantage Trust II, High Income Advantage Trust 
III, Dean Witter Government Income Trust, Dean Witter California Tax-Free 
Daily Income Trust, Dean Witter Utilities Fund, Dean Witter Strategist Fund, 
Dean Witter World Wide Income Trust, Dean Witter Intermediate Income 
Securities, Dean Witter Capital Growth Securities, Dean Witter European 
Growth Fund Inc., Dean Witter Pacific Growth Fund Inc., Dean Witter Precious 
Metals and Minerals Trust, Dean Witter Global Short-Term Income Fund Inc., 
Dean Witter Multi-State Municipal Series Trust, Dean Witter New York 
Municipal Money Market Trust, InterCapital Quality Municipal Investment 
Trust, Dean Witter Premier Income Trust, Dean Witter Short-Term U.S. Treasury 
Trust, InterCapital Insured Municipal Bond Trust, InterCapital Insured 
Municipal Trust, InterCapital Quality Municipal Income Trust, Dean Witter 
Diversified Income Trust, Dean Witter Health Sciences Trust, Dean Witter 
Retirement Series, InterCapital Quality Municipal Securities, InterCapital 
California Quality Municipal Securities, InterCapital New York Quality 
Municipal Securities, Dean Witter Global Dividend Growth Securities, Dean 
Witter Global Utilities Fund, Dean Witter High Income Securities, Dean Witter 
Limited Term Municipal Trust, Dean Witter Short-Term Bond Fund, Dean Witter 
International SmallCap Fund, Dean Witter Mid-Cap Growth Fund, Dean Witter 
Select Dimensions Investment Series, Dean Witter Balanced Growth Fund, Dean 
Witter Balanced Income Fund, Dean Witter Hawaii Municipal Trust, Dean Witter 
Capital Appreciation Fund, Dean Witter Intermediate Term U.S. Treasury Trust, 
Dean Witter Information Fund, Dean Witter Japan Fund, Dean Witter Income 
Builder Fund, Dean Witter Special Value Fund, InterCapital Insured Municipal 
Securities, InterCapital Insured California Municipal Securities, 
InterCapital Insured Municipal Income Trust, InterCapital California Insured 
Municipal Income Trust, Active Assets Money Trust, Active Assets California 
Tax-Free Trust, Active Assets Tax-Free Trust, Active Assets Government 
Securities Trust, Municipal Income Trust, Municipal Income Trust II, 
Municipal Income Trust III, Municipal Income Opportunities Trust, Municipal 
Income Opportunities Trust II, Municipal Income Opportunities Trust III, 
Municipal Premium Income Trust and Prime Income Trust. The foregoing 
investment companies, together with the Fund, are collectively referred to as 
the Dean Witter Funds. 

                                       3
<PAGE>

   In addition, Dean Witter Services Company Inc. ("DWSC"), a wholly-owned 
subsidiary of InterCapital, serves as manager for the following companies for 
which TCW Funds Management, Inc. is the investment adviser: TCW/DW Core 
Equity Trust, TCW/DW North American Government Income Trust, TCW/DW Latin 
American Growth Fund, TCW/DW Income and Growth Fund, TCW/DW Small Cap Growth 
Fund, TCW/DW Balanced Fund, TCW/DW Total Return Trust, TCW/DW Mid-Cap Equity 
Trust, TCW/DW Global Telecom Trust, TCW/DW Strategic Income Trust, TCW/DW 
Term Trust 2000, TCW/DW Term Trust 2002, TCW/DW Term Trust 2003 and TCW/DW 
Emerging Markets Opportunities Trust (the "TCW/DW Funds"). InterCapital also 
serves as: (i) sub-adviser to Templeton Global Opportunities Trust, an 
open-end investment company; (ii) administrator of The BlackRock Strategic 
Term Trust Inc., a closed-end investment company; and (iii) sub-administrator 
of MassMutual Participation Investors and Templeton Global Governments Income 
Trust, closed-end investment companies. 

   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 and policies. 

   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, bookkeeping and legal services as the Fund may 
reasonably require in the conduct of its business, including the preparation 
of prospectuses, 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 DWSC to perform 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, Dean Witter 
Distributors Inc. ("Distributors" or the "Distributor") (see "The 
Distributor"), will be paid by the Fund. The expenses borne by the Fund 
include, but are not limited to: charges and expenses of any registrar, 
custodian, stock transfer and dividend disbursing agent; brokerage 
commissions; taxes; engraving and printing 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 Funds 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. 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 at the annual rate 
of 0.35% of the daily net assets of the Fund. The Investment Manager had 
undertaken from June 2, 1994 (commencement of operations) to assume all 
expenses (except for brokerage and 12b-1 fees) and to waive the compensation 
provided for in its Management Agreement until December 31, 1995. The 

                                       4
<PAGE>

Investment Manager has undertaken from January 1, 1996 through June 30, 1997 
to continue to waive management fees and to continue to assume expenses 
(except for brokerage and 12b-1 fees) to the extent they exceed, on an 
annualized basis, 0.50% of the Fund's daily net assets. During the fiscal 
period June 2, 1994 through September 30, 1994 and during the fiscal year 
ended September 30, 1995, the fees payable ($21,252 and $158,216, 
respectively) under the Agreement were waived by the Investment Manager 
pursuant to the undertaking described above covering these periods. During 
the fiscal year ended September 30, 1996, the management fees payable under 
the Agreement amounted to $269,889 of which $117,136 was waived by the 
Investment Manager pursuant to the undertakings described above. 

   The Investment Manager has paid the organizational expenses of the Fund, 
in the amount of approximately $148,000, incurred prior to the offering of 
the Fund's shares. The Fund has reimbursed the Investment Manager for such 
expenses exclusive of any amounts assumed by the Investment Manager. The Fund 
has deferred and is amortizing the reimbursed expenses on the straight line 
method over a period not to exceed five years from the date of commencement 
of the Fund's operations. 

   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 May 10, 1994 and 
by InterCapital as the sole Shareholder on May 10, 1994. 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, as amended (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 had an initial term ending April 30, 1995, 
and will continue 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 Board of Trustees of the Fund; provided that in either event such 
continuance is approved annually by the vote of a majority of the Independent 
Trustees of the Fund who are not parties to the Agreement or "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. At its meeting held on April 17, 1996, 
the Fund's Board of Trustees, including all of the Independent Trustees, 
approved the most recent continuation of the Agreement until April 30, 1997. 

   The Fund has acknowledged that the name "Dean Witter" is a property right 
of DWR. The Fund has agreed that DWR or its parent company may use or, at any 
time, permit others to use, the name "Dean Witter". The Fund has also agreed 
that in the event the investment management contract between the Investment 
Manager and the Fund is terminated, or if the affiliation between 
InterCapital and its parent company is terminated, the Fund will eliminate 
the name "Dean Witter" from its name if DWR or its parent company shall so 
request. 

                                       5
<PAGE>

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 
InterCapital, and with the 82 Dean Witter Funds and the 14 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 (55)                             Chairman and Chief Executive Officer of Levitz Furniture 
 Trustee                                       Corporation (since November, 1995); Director or Trustee of 
 c/o Levitz Furniture Corporation              the Dean Witter Funds; formerly President and Chief Executive 
 6111 Broken Sound Parkway, N.W.               Officer of Hills Department Stores (May, 1991-July, 1995); 
 Boca Raton, Florida                           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., the United Negro College 
                                               Fund and Weirton Steel Corporation. 

Charles A. Fiumefreddo* (63)                   Chairman, Chief Executive Officer and Director of InterCapital, 
 Chairman of the Board, President and Chief    Distributors and DWSC; Executive Vice President and Director 
 Executive Officer and Trustee                 of DWR; Chairman, Director or Trustee, President and Chief 
 Two World Trade Center                        Executive Officer of the Dean Witter Funds; Chairman, Chief 
 New York, New York                            Executive Officer and Trustee of the TCW/DW Funds; Chairman 
                                               and Director of Dean Witter Trust Company ("DWTC"); Director 
                                               and/or officer of various DWDC subsidiaries; formerly Executive 
                                               Vice President and Director of DWDC (until February, 1993). 

Edwin J. Garn (64)                             Director or Trustee of the Dean Witter Funds; formerly United 
 Trustee                                       States Senator (R-Utah)(1974-1992) and Chairman, Senate 
 c/o Huntsman Chemical Corporation             Banking Committee (1980-1986); formerly Mayor of Salt Lake 
 500 Huntsman Way                              City, Utah (1971-1974); formerly Astronaut, Space Shuttle 
 Salt Lake City, Utah                          Discovery (April 12-19, 1985); Vice Chairman, Huntsman Chemical 
                                               Corporation (since January, 1993); Director of Franklin Quest 
                                               (time management systems) and John Alden Financial Corp.; 
                                               member of the board of various civic and charitable 
                                               organizations. 

John R. Haire (71)                             Chairman of the Audit Committee and Chairman of the Committee 
 Trustee                                       of the Independent Directors or Trustees and Director or Trustee 
 Two World Trade Center                        of the Dean Witter Funds; Chairman of the Audit Committee 
 New York, New York                            and Chairman of the Committee of the Independent Trustees 
                                               and Trustee of the TCW/DW Funds; formerly President, Council 
                                               for Aid to Education (1978-1989) and Chairman and Chief Executive 
                                               Officer of Anchor Corporation, an Investment Adviser 
                                               (1964-1978); Director of Washington National Corporation 
                                               (insurance). 

                                       6
<PAGE>

   NAME, AGE, POSITION WITH FUND AND ADDRESS          PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS 
- ---------------------------------------------- -------------------------------------------------------- 
Dr. Manuel H. Johnson (47)                     Senior Partner, Johnson Smick International, Inc., a consulting 
 Trustee                                       firm; Koch Professor of International Economics and Director 
 c/o Johnson Smick International, Inc.         of the Center for Global Market Studies at George Mason 
 1133 Connecticut Avenue, N.W.                 University; Co-Chairman and a founder of the Group of Seven 
 Washington, DC                                Council (G7C), an international economic commission (since 
                                               September, 1990); Director or Trustee of the Dean Witter Funds; 
                                               Trustee of the TCW/DW Funds; Director of NASDAQ (since June, 
                                               1995); Director of Greenwich Capital Markets Inc. 
                                               (broker-dealer); formerly Vice Chairman of the Board of 
                                               Governors of the Federal Reserve System (1986- 1990) and 
                                               Assistant Secretary of the U.S. Treasury (1982-1986). 

Michael E. Nugent (60)                         General Partner, Triumph Capital, LP., a private investment 
 Trustee                                       partnership; Director or Trustee of the Dean Witter Funds; 
 c/o Triumph Capital, LP                       Trustee of the TCW/DW Funds; formerly Vice President, Bankers 
 237 Park Avenue                               Trust Company and BT Capital Corporation (1984-1988); Director 
 New York, New York                            of various business organizations. 

Philip J. Purcell* (53)                        Chairman of the Board of Directors and Chief Executive Officer 
 Trustee                                       of DWDC, DWR and Novus Credit Services Inc.; Director of 
 Two World Trade Center                        InterCapital, DWSC and Distributors; Director or Trustee of 
 New York, New York                            the Dean Witter Funds; Director and/or officer of various 
                                               DWDC subsidiaries. 

John L. Schroeder (66)                         Retired; Director or Trustee of the Dean Witter Funds; Director 
 Trustee                                       of Citizens Utilities Company; formerly Executive Vice 
 c/o Gordon Altman Butowsky                    President and Chief Investment Officer of the Home Insurance 
  Weitzen Shalov & Wein                        Company (August, 1991-September, 1995); and Chairman and Chief 
 Counsel to the Independent Trustees           Investment Officer of Axe-Houghton Management and the 
 114 West 47th Street                          Axe-Houghton Funds (1983-1991). 
 New York, New York 

Sheldon Curtis (64)                            Senior Vice President, Secretary and General Counsel of 
 Vice President, Secretary                     InterCapital and DWSC; Senior Vice President and Secretary 
 and General Counsel                           of DWTC; Senior Vice President, Assistant Secretary and 
 Two World Trade Center                        Assistant General Counsel of Distributors; Assistant Secretary 
 New York, New York                            of DWR; Vice President, Secretary and General Counsel of the 
                                               Dean Witter Funds and the TCW/DW Funds. 

James F. Willison (53)                         Senior Vice President of InterCapital; Vice President of various 
 Vice President                                Dean Witter Funds. 
 Two World Trade Center 
 New York, New York 

Thomas F. Caloia (50)                          First Vice President and Assistant Treasurer of InterCapital 
 Treasurer                                     and DWSC; Treasurer of the Dean Witter Funds and the TCW/DW 
 Two World Trade Center                        Funds. 
 New York, New York
</TABLE>

- ------------ 
* Denotes Trustees who are "interested persons" of the Fund, as defined in 
the Act. 

                                       7
<PAGE>

   In addition, Robert M. Scanlan, President and Chief Operating Officer of 
InterCapital and DWSC, Executive Vice President of Distributors and DWTC and 
Director of DWTC, Robert S. Giambrone, Senior Vice President of InterCapital, 
DWSC and Distributors and DWTC and Director of DWTC, Joseph J. McAlinden, 
Executive Vice President and Chief Investment Officer of InterCapital and 
Director of DWTC, and Peter M. Avelar and Jonathan R. Page, Senior Vice 
Presidents of InterCapital, are Vice Presidents of the Fund, and Marilyn K. 
Cranney and Barry Fink, First Vice Presidents and Assistant General Counsels 
of InterCapital and DWSC, and Lou Anne D. McInnis and Ruth Rossi, Vice 
Presidents and Assistant General Counsels of InterCapital and DWSC, and 
Carsten Otto and Frank Bruttomesso, Staff Attorneys with InterCapital and 
DWSC, are Assistant Secretaries of the Fund. 

THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES 

   The Board of Trustees consists of eight (8) trustees. These same 
individuals also serve as directors or trustees for all of the 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 82 Dean Witter 
Funds, comprised of 122 portfolios. As of October 31, 1996, the Dean Witter 
Funds had total net assets of approximately $79.4 billion and more than five 
million shareholders. 

   Six Trustees (75% of the total number) have no affiliation or business 
connection with InterCapital or any of its affiliated persons and do not own 
any stock or other securities issued by InterCapital's parent company, DWDC. 
These are the "disinterested" or "independent" Trustees. The other two 
Trustees (the "management Trustees") are affiliated with InterCapital. Four 
of the six 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 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 
and the Committee of the Independent Trustees. Three of them also serve as 
members of the Derivatives Committee. During the calendar year ended December 
31, 1995, the three Committees held a combined total of fifteen meetings. The 
Committees hold some meetings at InterCapital's offices and some outside 
InterCapital. Management Trustees or officers do not attend these meetings 
unless they are invited for purposes of furnishing information or making a 
report. 

   The Committee of the Independent Trustees is 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 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; reviewing the adequacy of 
the Fund's system of internal controls; and preparing and submitting 
Committee meeting minutes to the full Board. 

                                       8
<PAGE>

   Finally, the Board of each Fund has formed a Derivatives Committee to 
establish parameters for and oversee the activities of the Fund with respect 
to derivative investments, if any, made by the Fund. 

DUTIES OF CHAIRMAN OF COMMITTEE OF THE INDEPENDENT TRUSTEES AND AUDIT 
COMMITTEE 

   The Chairman of the Committee of the Independent Trustees and the Audit 
Committee maintains an office at the Funds' headquarters in New York. He is 
responsible for keeping abreast of regulatory and industry developments and 
the Funds' operations and management. He screens and/or prepares written 
materials and identifies critical issues for the Independent Trustees to 
consider, develops agendas for Committee meetings, determines the type and 
amount of information that the Committees will need to form a judgment on 
various issues, and arranges to have that information furnished to Committee 
members. He also arranges for the services of independent experts and 
consults with them in advance of meetings to help refine reports and to focus 
on critical issues. Members of the Committees believe that the person who 
serves as Chairman of both Committees and guides their efforts is pivotal to 
the effective functioning of the Committees. 

   The Chairman of the Committees also maintains continuous contact with the 
Funds' management, with independent counsel to the Independent Trustees and 
with the Funds' independent auditors. He arranges for a series of special 
meetings involving the annual review of investment advisory, management and 
other operating contracts of the Funds and, on behalf of the Committees, 
conducts negotiations with the Investment Manager and other service 
providers. In effect, the Chairman of the Committees serves as a combination 
of chief executive and support staff of the Independent Trustees. 

   The Chairman of the Committee of the Independent Trustees and the Audit 
Committee is not employed by any other organization and devotes his time 
primarily to the services he performs as Committee Chairman and Independent 
Trustee of the Dean Witter Funds and as an Independent Trustee and, since 
July 1, 1996, as Chairman of the Committee of the Independent Trustees and 
the Audit Committee of the TCW/DW Funds. The current Committee Chairman has 
had more than 35 years experience as a senior executive in the investment 
company industry. 

ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL DEAN 
WITTER FUNDS 

   The Independent Trustees and the Funds' management believe that having the 
same Independent Trustees for each of the 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, and a Chairman of their Committees, of the caliber, experience and 
business acumen of the individuals who serve as Independent Trustees of the 
Dean Witter Funds. 

COMPENSATION OF INDEPENDENT TRUSTEES 

   The Fund pays each Independent Trustee an annual fee of $1,000 plus a per 
meeting fee of $50 for meetings of the Board of Trustees or committees of the 
Board of Trustees attended by the Trustee (the Fund pays the Chairman of the 
Audit Committee an annual fee of $750 and pays the Chairman of the Committee 
of the Independent Trustees an additional annual fee of $1,200). 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. 

   At such time as the Fund has paid fees to the Independent Trustees for a 
full fiscal year, and assuming that during such fiscal year the Fund holds 
the same number of Board and committee 

                                       9
<PAGE>

meetings as were held by the other Dean Witter Funds during the calendar year 
ended December 31, 1995, it is estimated that the compensation paid to each 
Independent Trustee during such fiscal year will be the amount shown in the 
following table: 

                        FUND COMPENSATION (ESTIMATED) 

<TABLE>
<CAPTION>
                               AGGREGATE 
                              COMPENSATION 
NAME OF INDEPENDENT TRUSTEE   FROM THE FUND 
- ---------------------------   -------------
<S>                              <C>
Michael Bozic .............      $2,000 
Edwin J. Garn .............       2,000 
John R. Haire .............       3,950 
Dr. Manuel H. Johnson  ....       2,000 
Michael E. Nugent..........       2,000 
John L. Schroeder..........       2,000 
</TABLE>

   The following table illustrates the compensation paid to the Fund's 
Independent Trustees for the calendar year ended December 31, 1995 for 
services to the 79 Dean Witter Funds and, in the case of Messrs. Haire, 
Johnson, Nugent and Schroeder, the 11 TCW/DW Funds that were in operation at 
December 31, 1995. 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 Dean Witter Money Market Funds. Mr. 
Schroeder was elected as a Trustee of the TCW/DW Funds on April 20, 1995. 

             COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS 

<TABLE>
<CAPTION>
                                                               FOR SERVICE AS 
                                                                CHAIRMAN OF        TOTAL 
                               FOR SERVICE                     COMMITTEES OF   COMPENSATION 
                             AS DIRECTOR OR    FOR SERVICE AS   INDEPENDENT        PAID 
                               TRUSTEE AND      TRUSTEE AND      DIRECTORS/   FOR SERVICES TO 
                            COMMITTEE MEMBER  COMMITTEE MEMBER  TRUSTEES AND  79 DEAN WITTER 
                            OF 79 DEAN WITTER   OF 11 TCW/DW       AUDIT       FUNDS AND 11 
NAME OF INDEPENDENT TRUSTEE        FUNDS            FUNDS         COMMITTEES    TCW/DW FUNDS 
- --------------------------- ----------------- ---------------- -------------- --------------- 
<S>                             <C>               <C>             <C>            <C>
Michael Bozic .............     $126,050               --               --       $126,050 
Edwin J. Garn .............      136,450               --               --        136,450 
John R. Haire .............       98,450          $82,038         $217,350(1)     397,838 
Dr. Manuel H. Johnson  ....      136,450           82,038               --        218,488 
Michael E. Nugent .........      124,200           75,038               --        199,238 
John L. Schroeder..........      136,450           46,964               --        183,414 
</TABLE>

- --------------
(1)    For the 79 Dean Witter Funds in operation at December 31, 1995. As 
       noted above, on July 1, 1996, Mr. Haire became Chairman of the 
       Committee of the Independent Trustees and the Audit Committee of the 
       TCW/DW Funds in addition to continuing to serve in such positions for 
       the Dean Witter Funds. 

   As of the date of this Statement of Additional Information, 57 of the Dean 
Witter Funds, not 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 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 25.0% of his or her Eligible Compensation plus 0.4166666% 
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 

                                      10
<PAGE>

maximum of 50.0% after ten years of service. The foregoing percentages may be 
changed by the Board.(2) "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 57 Dean Witter Funds (not including the 
Fund) as of December 31, 1995, and the estimated retirement benefits for the 
Fund's Independent Trustees from the 57 Dean Witter Funds as of December 31, 
1995. 

                RETIREMENT BENEFITS FROM ALL DEAN WITTER FUNDS 

<TABLE>
<CAPTION>
                                                                          ESTIMATED 
                                                             RETIREMENT     ANNUAL 
                               ESTIMATED                      BENEFITS     BENEFITS 
                               CREDITED                      ACCRUED AS      UPON 
                                 YEARS         ESTIMATED      EXPENSES    RETIREMENT 
                             OF SERVICE AT   PERCENTAGE OF     BY ALL      FROM ALL 
                               RETIREMENT       ELIGIBLE       ADOPTING     ADOPTING 
NAME OF INDEPENDENT TRUSTEE   (MAXIMUM 10)    COMPENSATION      FUNDS      FUNDS (3) 
- ---------------------------  -------------   -------------   ----------   ---------- 
<S>                               <C>            <C>          <C>          <C>
Michael Bozic .............       10             50.0%        $ 26,359     $ 51,550 
Edwin J. Garn .............       10             50.0           41,901       51,550 
John R. Haire .............       10             50.0          261,763      130,404 
Dr. Manuel H. Johnson  ....       10             50.0           16,748       51,550 
Michael E. Nugent .........       10             50.0           30,370       51,550 
John L. Schroeder..........        8             41.7           51,812       42,958 
</TABLE>

- --------------
(2)    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. 
(3)    Based on current levels of compensation. Amount of annual benefits also 
       varies depending on the Trustee's elections described in Footnote (2) 
       above. 

   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 
- ----------------------------------------------------------------------------- 

PORTFOLIO SECURITIES 

   The payment of principal and interest by issuers of certain Municipal 
Bonds and Notes ("Municipal Obligations") purchased by the Fund may be 
guaranteed by letters of credit or other credit facilities offered by banks 
or other financial institutions. Such guarantees will be considered in 
determining whether a Municipal Obligation meets the Fund's investment 
quality requirements. In addition, some issues may contain provisions which 
permit the Fund to demand from the issuer repayment of principal at some 
specified period(s) prior to maturity. 

   Municipal Bonds. Municipal Bonds, as referred to in the Prospectus, are 
debt obligations of a state, its cities, municipalities and municipal 
agencies (all of which are generally referred to as "municipalities") which 
generally have a maturity at the time of issuance of one year or more, and 
the interest from which is, in the opinion of bond counsel, exempt from 
federal income tax. They are issued to raise funds for various public 
purposes, such as construction of a wide range of public facilities, to 
refund outstanding obligations and to obtain funds for general operating 
expenses or to loan to other public institutions and facilities. In addition, 
certain types of industrial development bonds and pollution control bonds are 
issued by or on behalf of public authorities to provide funding for various 
privately operated facilities. 

                                      11
<PAGE>

   Municipal Notes. Municipal Notes are short-term obligations of 
municipalities, generally with a maturity at the time of issuance ranging 
from six months to three years, the interest from which is, in the opinion of 
bond counsel, exempt from federal income tax. The principal types of 
Municipal Notes include tax anticipation notes, bond anticipation notes, 
revenue anticipation notes and project notes, although there are other types 
of Municipal Notes in which the Fund may invest. Notes sold in anticipation 
of collection of taxes, a bond sale or receipt of other revenues are usually 
general obligations of the issuing municipality or agency. Project Notes are 
issued by local agencies and are guaranteed by the United States Department 
of Housing and Urban Development. Such notes are secured by the full faith 
and credit of the United States Government. Project Notes are not currently 
being issued. 

   Municipal Commercial Paper. Municipal Commercial Paper refers to 
short-term obligations of municipalities the interest from which is, in the 
opinion of bond counsel, exempt from federal income tax, and which may be 
issued at a discount and is sometimes referred to as Short-Term Discount 
Notes. Municipal Commercial Paper is likely to be used to meet seasonal 
working capital needs of a municipality or interim construction financing and 
to be paid from general revenues of the municipality or refinanced with 
long-term debt. In most cases, Municipal Commercial Paper is backed by 
letters of credit, lending agreements, note repurchase agreements or other 
credit facility agreements offered by banks or other institutions. 

   Obligations of issuers of Municipal Bonds, Municipal Notes and Municipal 
Commercial Paper are subject to provisions of bankruptcy, insolvency and 
other laws affecting the rights and remedies of creditors, such as the 
Federal Bankruptcy Act, and laws, if any, which may be enacted by Congress or 
any state extending the time for payment of principal or interest, or both, 
or imposing other constraints upon enforcement of such obligations or upon 
municipalities to levy taxes. There is also the possibility that, as a result 
of litigation or other conditions, the power or ability of any one or more 
issuers to pay, when due, principal of and interest on its, or their, 
Municipal Bonds, Municipal Notes and Municipal Commercial Paper may be 
materially affected. 

   Special Investment Considerations. The percentage and rating policies in 
the Prospectus apply at the time of acquisition of a security based upon the 
last previous determination of the Fund's net asset value; any subsequent 
change in any ratings by a rating service or change in percentages resulting 
from market fluctuations or other changes in the amount of total assets will 
not require elimination of any security from the Fund's portfolio until such 
time as the Investment Manager determines that it is practicable to sell the 
security without undue market or tax consequences to the Fund. Therefore, the 
Fund may hold securities which have been downgraded to ratings of Ba or BB or 
lower by Moody's or S&P. Such securities are considered to be speculative 
investments. However, the Fund does not intend to invest in Municipal 
Obligations which are rated below either Baa by Moody's or BBB by S&P (the 
lowest ratings considered investment grade) or, if not rated, are deemed by 
the Investment Manager to be below investment grade, in amounts exceeding 5% 
of its net assets. Any subsequent change in any rating of any security below 
investment grade which causes the Fund to be invested in such securities in 
an amount exceeding 5% of its net assets will result in the elimination of 
that security from the Fund's portfolio as soon as practicable without 
adverse market or tax consequences to the Fund. 

   Furthermore, the Fund does not have any minimum quality rating standard 
for its downgraded or lower-rated investments. As such, the Fund may invest 
in securities rated as low as Caa, Ca or C by Moody's or CCC, CC, C, CI or D 
by S&P. Bonds rated Caa or Ca by Moody's may already be in default on payment 
of interest or principal, while bonds rated C by Moody's, their lowest bond 
rating, can be regarded as having extremely poor prospects of ever attaining 
any real investment standing. Bonds rated CI or D by S&P, their lowest bond 
rating, are no longer making interest payments or are in default. 

   Because of the special nature of securities which are rated below 
investment grade by national credit rating agencies ("lower-rated 
securities"), the Investment Manager must take account of certain special 
considerations in assessing the risks associated with such investments. For 
example, as the lower rated securities market is relatively new, its growth 
has paralleled a long economic expansion and it has not weathered a recession 
in its present size and form. Therefore, an economic downturn or increase in 
interest rates is likely to have a negative effect on this market and on the 
value of the lower rated securities held by the Fund, as well as on the 
ability of the securities' issuers to repay principal and interest on their 
borrowings. 

                                      12
<PAGE>

   The prices of lower rated 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 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 lower rated 
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 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 lower rated 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 lower rated securities at certain times 
and should make it difficult for the Fund to sell certain securities. 

   New laws and proposed new laws may have a potentially negative impact on 
the market for lower rated securities. For example, recent legislation 
requires federally-insured savings and loan associations to divest their 
investments in lower rated securities. This legislation and other proposed 
legislation may have an adverse effect upon the value of lower rated 
securities and a concomitant negative impact upon the net asset value of a 
share of the Fund. 

PORTFOLIO CHARACTERISTICS 

   Variable Rate Obligations. As stated in the Prospectus, the Fund may 
invest in obligations of the type called "variable rate obligations". 

   The interest rate payable on a variable rate obligation is adjusted either 
at predesignated periodic intervals or whenever there is a change in the 
market rate of interest on which the interest rate payable is based. Other 
features may include the right whereby the Fund may demand prepayment of the 
principal amount of the obligation prior to its stated maturity (a "demand 
feature") and the right of the issuer to prepay the principal amount prior to 
maturity. The principal benefit of a variable rate obligation is that the 
interest rate adjustment minimizes changes in the market value of the 
obligation. The principal benefit to the Fund of purchasing obligations with 
a demand feature is that liquidity, and the ability of the Fund to obtain 
repayment of the full principal amount of the obligation prior to maturity, 
is enhanced. 

   When-Issued and Delayed Delivery Securities. As stated in the Prospectus, 
the Fund may purchase tax-exempt securities on a when-issued or delayed 
delivery 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. While the Fund will only purchase 
securities on a when-issued or delayed delivery basis with the intention of 
acquiring the securities, the Fund may sell the securities before the 
settlement date, if it is deemed advisable. The securities so purchased or 
sold are subject to market fluctuation and no interest accrues to the 
purchaser during this period. At the time the Fund makes the commitment to 
purchase a Municipal Obligation on a when-issued or delayed delivery basis, 
it will record the transaction and thereafter reflect the value, each day, of 
the Municipal Obligation in determining its net asset value. The Fund will 
also establish a segregated account with its custodian bank in which it will 
maintain cash, cash equivalents or other liquid portfolio securities equal in 
value to commitments for such when-issued or delayed delivery securities. The 
Fund does not believe that its net asset value or income will be adversely 
affected by its purchase of Municipal Obligations on a when-issued or delayed 
delivery basis. The Fund may sell securities on a when-issued or delayed 
delivery basis provided that the Fund owns the security at the time of the 
sale. During the fiscal year ended September 30, 1996, the Fund's investments 
in when-issued and delayed delivery securities did not exceed 5% of the 
Fund's total assets. 

                                      13
<PAGE>

   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. 
These agreements, which may be viewed as a type of secured lending by the 
Fund, 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 ("collateral"), which is held by the Fund's Custodian, at a 
specified price and at a fixed time in the future, usually not more than 
seven days from the date of purchase. The Fund will receive 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. These procedures 
include effecting repurchase transactions only with large, well-capitalized 
and well-established financial institutions, whose financial condition will 
be continually monitored by the Investment Manager. In addition, the value of 
the collateral underlying the repurchase agreement will always be a least 
equal to the repurchase price, including any accrued interest earned on the 
repurchase agreement. In the event of a default or bankruptcy by a selling 
financial institution, the Fund will seek to liquidate such collateral. 
However, the exercising of the Fund's right to liquidate such collateral 
could involve certain costs or delays and, to the extent that proceeds from 
any sale upon a default of the obligation to repurchase were less than the 
repurchase price, the Fund could suffer a loss. It is the current policy of 
the Fund not to invest in repurchase agreements that do not mature within 
seven days if any such investment, together with any other illiquid assets 
held by the Fund, amounts to more than 15% of its net assets. The Fund's 
investments in repurchase agreements may at times be substantial when, in the 
view of the Investment Manager, liquidity or other considerations warrant. 

FUTURES CONTRACTS AND OPTIONS ON FUTURES 

   As discussed in the Prospectus, the Fund may invest in financial futures 
contracts ("futures contracts") and related options thereon. These futures 
contracts and related options thereon will be used only as a hedge against 
anticipated interest rate changes. A futures contract sale creates an 
obligation by the Fund, as seller, to deliver the specific type of instrument 
called for in the contract at a specified future time for a specified price. 
A futures contract purchase would create an obligation by the Fund, as 
purchaser, to take delivery of the specific type of financial instrument at a 
specified future time at a specified price. The specific securities delivered 
or taken, respectively, at settlement date, would not be determined until on 
or near that date. The determination would be in accordance with the rules of 
the exchange on which the futures contract sale or purchase was effected. 

   Although the terms of futures contracts specify actual delivery or receipt 
of securities, in most instances the contracts are closed out before the 
settlement date without the making or taking of delivery of the securities. 
Closing out of a futures contract is usually effected by entering into an 
offsetting transaction. An offsetting transaction for a futures contract sale 
is effected by the Fund entering into a futures contract purchase for the 
same aggregate amount of the specific type of financial instrument at the 
same delivery date. If the price in the sale exceeds the price in the 
offsetting purchase, the Fund is immediately paid the difference and thus 
realizes a gain. If the offsetting purchase price exceeds the sale price, the 
Fund pays the difference and realizes a loss. Similarly, the closing out of a 
futures contract purchase is effected by the Fund entering into a futures 
contract sale. If the offsetting sale price exceeds the purchase price the 
Fund realizes a gain, and if the offsetting sale price is less than the 
purchase price the Fund realizes a loss. 

   Unlike a futures contract, which requires the parties to buy and sell a 
security on a set date, an option on a futures contract entitles its holder 
to decide on or before a future date whether to enter into such a contract (a 
long position in the case of a call option and a short position in the case 
of a put option). If the holder decides not to enter into the contract, the 
premium paid for the contract is lost. Since 

                                      14
<PAGE>

the value of the option is fixed at the point of sale, there are no daily 
payments of cash to reflect the change in the value of the underlying 
contract, as discussed below for futures contracts. The value of the option 
changes is reflected in the net asset value of the Fund. 

   The Fund is required to maintain margin deposits with brokerage firms 
through which it effects futures contracts and options thereon. The initial 
margin requirements vary according to the type of the underlying security. In 
addition, due to current industry practice, daily variations in gains and 
losses on open contracts are required to be reflected in cash in the form of 
variation margin payments. The Fund may be required to make additional margin 
payments during the term of the contract. 

   Currently, futures contracts can be purchased on debt securities such as 
U.S. Treasury Bills and Bonds, U.S. Treasury Notes with maturities between 6 
1/2 and 10 years, Certificates of the Government National Mortgage 
Association, Bank Certificates of Deposit and on a municipal bond index (see 
below). The Fund may invest in interest rate futures contracts covering these 
types of financial instruments as well as in new types of contracts that 
become available in the future. 

   Financial futures contracts are traded in an auction environment on the 
floors of several Exchanges--principally, the Chicago Board of Trade, the 
Chicago Mercantile Exchange and the New York Futures Exchange. Each Exchange 
guarantees performance under contract provisions through a clearing 
corporation, a nonprofit organization managed by the Exchange membership 
which is also responsible for handling daily accounting of deposits or 
withdrawals of margin. 

   A risk in employing futures contracts to protect against the price 
volatility of portfolio securities is that the prices of securities subject 
to futures contracts may correlate imperfectly with the behavior of the cash 
prices of the Fund's portfolio securities. The correlation may be distorted 
by the fact that the futures market is dominated by short-term traders 
seeking to profit from the difference between a contract or security price 
objective and their cost of borrowed funds. This would reduce the value of 
futures contracts for hedging purposes over a short time period. The 
correlation may be further distorted since the futures contracts that are 
being used to hedge are not based on municipal obligations. 

   Another risk is that the Fund's Investment Manager could be incorrect in 
its expectations as to the direction or extent of various interest rate 
movements or the time span within which the movements take place. For 
example, if the Fund sold futures contracts for the sale of securities in 
anticipation of an increase in interest rates, and then interest rates went 
down instead, causing bond prices to rise, the Fund would lose money on the 
sale. 

   Put and call options on financial futures have characteristics similar to 
Exchange traded options. For a further description of options, see below and 
the Prospectus. 

   In addition to the risks associated in investing in options on securities, 
there are particular risks associated with investing in options on futures. 
In particular, the ability to establish and close out positions on such 
options will be subject to the development and maintenance of a liquid 
secondary market. It is not certain that such a market will develop. 

   In order to assure that the Fund is entering into transactions in futures 
contracts for hedging purposes as such is defined by the Commodity Futures 
Trading Commission either: 1) a substantial majority (i.e., approximately 
75%) of all anticipatory hedge transactions (transactions in which the Fund 
does not own at the time of the transaction, but expects to acquire, the 
securities underlying the relevant futures contract) involving the purchase 
of futures contracts will be completed by the purchase of securities which 
are the subject of the hedge or 2) the underlying value of all long positions 
in futures contracts will not exceed the total value of a) all short-term 
debt obligations held by the Fund; b) cash held by the Fund; c) cash proceeds 
due to the Fund on investments within thirty days; d) the margin deposited on 
the contracts; and e) any unrealized appreciation in the value of the 
contracts. 

   The Fund may not enter into futures contracts or related options thereon 
if, immediately thereafter, the amount committed to margin plus the amount 
paid for option premiums exceeds 5% of the value of the Fund's total assets. 
In instances involving the purchase of futures contracts by the Fund, an 
amount equal to the market value of the futures contract will be deposited in 
a segregated account of cash and 

                                      15
<PAGE>

cash equivalents to collateralize the position and thereby ensure that the 
use of such futures is unleveraged. The Fund may not purchase or sell futures 
contracts or related options if, immediately thereafter, more than one-third 
of its net assets would be hedged. 

   Municipal Bond Index Futures--The Fund may utilize municipal bond index 
futures contracts and options thereon for hedging purposes. The Fund's 
strategies in employing such contracts will be similar to that discussed 
above with respect to financial futures and options thereon. A municipal bond 
index is a method of reflecting in a single number the market value of many 
different municipal bonds and is designed to be representative of the 
municipal bond market generally. The index fluctuates in response to changes 
in the market values of the bonds included within the index. Unlike futures 
contracts on particular financial instruments, futures contracts on a 
municipal bond index will be settled in cash if held until the close of 
trading in the contract. However, as in any other futures contract, a 
position in the contract may be closed out by purchase or sale of an 
offsetting contract for the same delivery month prior to expiration of the 
contract. 

   Options--The Fund may purchase or sell (write) options on debt securities 
as a means of achieving additional return or hedging the value of the Fund's 
portfolio. The Fund will only buy options listed on national securities 
exchanges. The Fund will not purchase options if, as a result, the aggregate 
cost of all outstanding options exceeds 10% of the Fund's total assets. 

   Presently there are no options on tax-exempt securities traded on national 
securities exchanges and until such time as they become available, the Fund 
will not invest in options on debt securities. 

   A call option is a contract that gives the holder of the option the right 
to buy from the writer of the call option, in return for a premium, the 
security underlying the option at a specified exercise price at any time 
during the term of the option. The writer of the call option has the 
obligation, upon exercise of the option, to deliver the underlying security 
upon payment of the exercise price during the option period. A put option is 
a contract that gives the holder of the option the right to sell to the 
writer, in return for a premium, the underlying security at a specified price 
during the term of the option. The writer of the put has the obligation to 
buy the underlying security upon exercise, at the exercise price during the 
option period. 

   The Fund will only write covered call or covered put options listed on 
national exchanges. The Fund may not write covered options in an amount 
exceeding 20% of the value of its total assets. A call option is "covered" if 
the Fund owns the underlying security covered by the call or has an absolute 
and immediate right to acquire that security or futures contract without 
additional cash consideration (or for additional cash consideration held in a 
segregated account by its custodian) upon conversion or exchange of other 
securities held in its portfolio. A call option is also covered if the Fund 
holds a call on the same security or futures contract as the call written, 
where the exercise price of the call held is (i) equal to or less than the 
exercise price of the call written or (ii) greater than the exercise price of 
the call written if the difference is maintained by the Fund in cash, 
Treasury bills or other liquid portfolio securities in a segregated account 
with its custodian. A put option is "covered" if the Fund maintains cash, 
Treasury bills or other liquid portfolio securities with a value equal to the 
exercise price in a segregated account with its custodian, or else holds a 
put on the same security or futures contract as the put written where the 
exercise price of the put held is equal to or greater than the exercise price 
of the put written. 

   If the Fund has written an option, it may terminate its obligation by 
effecting a closing purchase transaction. This is accomplished by purchasing 
an option of the same series as the option previously written. However, once 
the Fund has been assigned an exercise notice, the Fund will be unable to 
effect a closing purchase transaction. Similarly, if the Fund is the holder 
of an option, it may liquidate its position by effecting a closing sale 
transaction. This is accomplished by selling an option of the same series as 
the option previously purchased. There can be no assurance that either a 
closing purchase or sale transaction can be effected when the Fund so 
desires. 

   The Fund will realize a profit from a closing transaction if the price of 
the transaction is less than the premium received from writing the option or 
is more than the premium paid to purchase the option; the Fund will realize a 
loss from a closing transaction if the price of the transaction is more than 
the premium 

                                      16
<PAGE>

received from writing the option or is less than the premium paid to purchase 
the option. Since call option prices generally reflect increases in the price 
of the underlying security, any loss resulting from the purchase of a call 
option may also be wholly or partially offset by unrealized appreciation of 
the underlying security. If a put option written by the Fund is exercised, 
the Fund may incur a loss equal to the difference between the exercise price 
of the option and the sum of the sale price of the underlying security plus 
the premiums received from the sale of the option. Other principal factors 
affecting the market value of a put or a call option include supply and 
demand, interest rates, the current market price and price volatility of the 
underlying security and the time remaining until the expiration date. 

   An option position may be closed out only on an exchange which provides a 
secondary market for an option of the same series. Although the Fund will 
generally purchase or write only those options for which there appears to be 
an active secondary market, there is no assurance that a liquid secondary 
market on an exchange will exist for any particular option. In such event, it 
might not be possible to effect closing transactions in particular options, 
so that the Fund would have to exercise its options in order to realize any 
profit and would incur brokerage commissions upon the exercise of call 
options and upon the subsequent disposition of underlying securities for the 
exercise of put options. If the Fund as a covered call option writer is 
unable to effect a closing purchase transaction in a secondary market, it 
will not be able to sell the underlying security until the option expires or 
it delivers the underlying security upon exercise. 

PORTFOLIO MANAGEMENT 

   The Fund may engage in short-term trading consistent with its investment 
objective. Securities may be sold in anticipation of a market decline (a rise 
in interest rates) or purchased in anticipation of a market rise (a decline 
in interest rates). In addition, a security may be sold and another security 
of comparable quality purchased at approximately the same time to take 
advantage of what the Investment Manager believes to be a temporary disparity 
in the normal yield relationship between the two securities. These yield 
disparities may occur for reasons not directly related to the investment 
quality of particular issues or the general movement of interest rates, such 
as changes in the overall demand for, or supply of, various types of 
tax-exempt securities. 

   In general, purchases and sales may also be made to restructure the 
portfolio in terms of average maturity, quality, coupon yield, or 
diversification for any one or more of the following purposes: (a) to 
increase income, (b) to improve portfolio quality, (c) to minimize capital 
depreciation, (d) to realize gains or losses, or for such other reasons as 
the Investment Manager deems relevant in light of economic and market 
conditions. 

   The Fund may invest in obligations customarily sold to institutional 
investors in private transactions with the issuers thereof and up to 5% of 
its total assets in securities for which a bona fide market does not exist at 
the time of purchase. With respect to any securities as to which a bona fide 
market does not exist, the Fund may be unable to dispose of such securities 
promptly at reasonable prices. 

   The Fund does not generally intend to invest more than 25% of its total 
assets in securities of any one governmental unit or in the securities of 
governmental units located in any one state, territory or possession of the 
United States. Subject to investment restriction number 3 disclosed in the 
Prospectus under the Section "Investment Restrictions," the Fund may invest 
more than 25% of its total assets in industrial development and pollution 
control bonds (two kinds of tax-exempt Municipal Bonds). 

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, which 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% of the shares present at a 
meeting of shareholders, if the holders of more than 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. For purposes of the following 
restrictions: (a) an "issuer" of a security is the entity whose assets and 
revenues are committed to the payment of 

                                      17
<PAGE>

interest and principal on that particular security; (b) a "taxable security" 
is any security the interest on which is subject to federal income tax; and 
(c) all percentage limitations apply immediately after a purchase or initial 
investment, and any subsequent change in any applicable percentage resulting 
from market fluctuations or other changes in the amount of total or net 
assets does not require elimination of any security from the portfolio. 

   The Fund may not: 

       1. Purchase or sell real estate or interests therein, although it may
   purchase securities secured by real estate or interests therein. This shall
   not prohibit the Trust from purchasing, holding and selling real estate
   acquired as a result of the ownership of such securities.

       2. Purchase or sell commodities except that the Fund may purchase or
   sell financial futures contracts and related options thereon.

       3. Purchase oil, gas or other mineral leases, rights or royalty
   contracts, or exploration or development programs.

       4. Write, purchase or sell puts, calls, or combinations thereof, except
   for options on futures contracts or options on debt securities.

       5. Purchase securities of other investment companies, except in
   connection with a merger, consolidation, reorganization or acquisition of
   assets.

       6. Borrow money, except that the Fund may borrow from a bank for
   temporary or emergency purposes in amounts not exceeding 5% (taken at the
   lower of cost or current value) of the value of its total assets (not
   including the amount borrowed).

       7. Pledge its assets or assign or otherwise encumber them except to
   secure borrowing effected within the limitations set forth in Restriction
   6. However, for the purpose of this restriction, collateral arrangements
   with respect to the writing of options and collateral arrangements with
   respect to initial margin for futures are not deemed to be pledges of
   assets.

       8. 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: (a)
   entering into any repurchase agreement; (b) purchasing any securities on a
   when-issued or delayed delivery basis; (c) purchasing or selling any
   financial futures contracts; (d) borrowing money in accordance with
   restrictions described above; or (e) lending portfolio securities.

       9. Make loans of money or securities, except: (a) by the purchase of
   debt obligations in which the Fund may invest consistent with its
   investment objective and policies; and (b) by investment in repurchase
   agreements.

       10. Make short sales of securities.

       11. Purchase securities on margin, except for such short-term loans as
   are necessary for the clearance of purchases of portfolio securities.

       12. 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.

       13. Invest for the purpose of exercising control or management of any
   other issuer.

   In addition, as a nonfundamental policy, the Fund may not (i) invest in 
securities of any issuer if, to the knowledge of the Fund, any officer or 
trustee of the Fund or any officer or director of the Manager or the Adviser 
owns more than 1/2 of 1% of the outstanding securities of such issuer, and 
such officers, trustees and directors who own more than 1/2 of 1% own in the 
aggregate more than 5% of the outstanding securities of such issuers; or (ii) 
purchase securities of other investment companies, except in connection with 
a merger, consolidation, reorganization or acquisition of assets or by 
purchase in the open market of securities of closed-end investment companies 
where no underwriter's or dealer's commission or profit, other than customary 
broker's commissions, is involved and only if immediately 

                                      18
<PAGE>

thereafter not more than (a) 5% of the Fund's total assets, taken at market 
value, would be invested in any one such company, (b) 10% of the Fund's total 
assets, taken at market value, would be invested in such securities and (c) 
3% of any one such company's voting securities would be owned by the Fund. 

PORTFOLIO TRANSACTIONS AND BROKERAGE 
- ----------------------------------------------------------------------------- 

   Subject to the general supervision of the Board of Trustees, the 
Investment Manager is responsible for decisions to buy and sell securities 
and futures contracts for the Fund, the selection of brokers and dealers to 
effect the transactions, and the negotiation of brokerage commissions, if 
any. The Fund expects that the primary market for the securities in which it 
intends to invest will generally be the over-the-counter market. Securities 
are generally traded in the over-the-counter market on a "net" basis with 
dealers acting as principal for their own account without charging a stated 
commission, although the price of the security usually includes a profit to 
the dealer. Options and futures transactions will usually be effected through 
a broker and a commission will be charged. The Fund also expects that 
securities will be purchased at times in underwritten offerings, where the 
price includes a fixed amount of compensation, generally referred to as the 
underwriter's concession or discount. On occasion, the Fund may also purchase 
certain money market instruments directly from an issuer, in which case no 
commissions or discounts are paid. During the fiscal period June 2, 1994 
through September 30, 1994 and during the fiscal years ended September 30, 
1995 and September 30, 1996, the Fund paid no 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 are 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 may 
utilize a pro-rata allocation process based on the size of the 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 and 
futures contracts for its portfolio is that primary consideration will be 
given to obtaining the most favorable prices and efficient execution of 
transactions. Consistent with this policy, when securities transactions are 
effected on a stock exchange, the Fund's policy is to pay commissions which 
are considered fair and reasonable without necessarily determining that the 
lowest possible commissions are paid in all circumstances. The Fund believes 
that a requirement always to seek the lowest commission cost could impede 
effective portfolio management and preclude the Fund and the Investment 
Manager from obtaining a high quality of brokerage and research services. In 
seeking to determine the reasonableness of brokerage commissions paid in any 
transaction, the Investment Manager relies upon its experience and knowledge 
regarding commissions generally charged by various brokers and on its 
judgment in evaluating the brokerage and research services received from the 
broker effecting the transaction. Such determinations are necessarily 
subjective and imprecise, as in most cases an exact dollar value for those 
services is not ascertainable. 

   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 who are capable of 
providing efficient executions. If the Investment Manager believes such price 
and execution 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. 

                                      19
<PAGE>

   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 thus 
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 (not including 
Tax-Exempt Municipal Paper). Such transactions will be effected with DWR only 
when the price available from DWR is better than that available from other 
dealers. 

   Consistent with the policy described above, brokerage transactions in 
securities listed on exchanges or admitted to unlisted trading privileges may 
be effected through DWR. In order for DWR to effect portfolio transactions 
for the Fund, the commissions, fees or other remuneration received by DWR 
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 DWR 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 Trustees of the Fund, including a majority of the Trustees who are not 
"interested" Trustees, have adopted procedures which are reasonably designed 
to provide that any commissions, fees or other remuneration paid to DWR are 
consistent with the foregoing standard. The Fund did not effect any 
securities transactions with or through DWR or any other selected 
broker-dealer affiliated with the Fund or its Investment Manager during the 
fiscal year ended September 30, 1996. 

THE DISTRIBUTOR 
- ----------------------------------------------------------------------------- 

   As discussed in the Prospectus, shares of the Fund are distributed by 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 an indirect wholly-owned subsidiary 
of DWDC. 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 May 10, 1994, the current Distribution Agreement appointing 
the Distributor as 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, 
1995, and provides that it will remain in effect from year to year thereafter 
if approved by the Board. At its meeting held on April 17, 1996, the Board of 
Trustees, including all of the Independent Trustees, approved the 
continuation of the Distribution Agreement until April 30, 1997. 

   The Distributor bears all expenses incurred 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 account 
executives. 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 and 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 absense of willful 
misfeasance, bad faith, 

                                      20
<PAGE>

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 

   To compensate the Distributor for the services provided and for the 
expenses borne by the Distributor or any selected dealer under the 
Distribution Agreement, the Fund has adopted a Plan of Distribution pursuant 
to Rule 12b-1 under the Act (the "Plan") pursuant to which the Fund pays the 
Distributor compensation accrued daily and payable monthly at the annual rate 
of 0.60% of the lesser of: (a) the average daily aggregate gross sales of the 
Fund's 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 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 Fund's average daily net assets. The 
Distributor also receives the proceeds of contingent deferred sales charges 
imposed on certain redemptions of shares, which are separate and apart from 
payments made pursuant to the Plan (see "Redemption and Repurchases--
Contingent Deferred Sales Charge" in the Prospectus). The Distributor has
informed the Fund that it and/or DWR received approximately $4,100, $144,389
and $175,876, respectively, in contingent deferred sales charges for the
fiscal period June 2, 1994 through September 30, 1994 and for the fiscal years
ended September 30, 1995 and September 30, 1996.

   The Distributor has informed the Fund that an amount of the fees payable 
by the Fund each year pursuant to the Plan of Distribution equal to 0.15% of 
the Fund's average daily net assets is characterized as a "service fee" under 
the Rules of Fair Practice of the National Association of Securities Dealers, 
Inc. (of which the Distributor is a member). Such fee is a payment made for 
personal service and/or the maintenance of shareholder accounts. The 
remaining portion of the Plan of Distribution fee payments made by the Fund 
is characterized as an "asset-based sales charge" as such is defined by the 
aforementioned Rules of Fair Practice. 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. 

   The Plan was adopted by a vote of the Trustees of the Fund on May 10, 
1994, 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 the Distributor 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. 
InterCapital, as sole shareholder of the Fund, approved the Plan on May 10, 
1994, whereupon the Plan went into effect. 

   Under its terms, the Plan had an initial term ending April 30, 1995 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. 
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. At its 
meeting held on April 17, 1996, the Board of Trustees, including all of the 
Independent Trustees, approved the continuation of the Plan until April 30, 
1997. Prior to approving the continuation of the Plan, the Board requested 
and received from the Distributor and reviewed all the information which it 
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 

                                      21
<PAGE>

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 by the Distributor, DWR and other selected 
broker-dealers 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. This determination was based upon the conclusion of the 
Trustees that the Plan provides an effective means of stimulating sales of 
shares of the Fund and of reducing or avoiding net redemptions and the 
potentially adverse effects that may occur therefrom. In the Trustee's 
quarterly review of the Plan, they will consider its continued 
appropriateness and the level of compensation provided therein. 

   Under the Plan and as required by Rule 12b-1, the Trustees 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. The Fund 
accrued amounts payable to the Distributor under the Plan, during the fiscal 
year ended September 30, 1996, of $452,823. This amount is equal to 0.59% of 
the Fund's average daily net assets for the fiscal year and was calculated 
pursuant to clause (a) of the compensation formula under the Plan. This 
amount is treated by the Fund as an expense in the year it is accrued. 

   The Plan was adopted in order to permit the implementation of the Fund's 
method of distribution. Under this distribution method shares of the Fund are 
sold without a sales load being deducted at the time of purchase, so that the 
full amount of an investor's purchase payment will be invested in shares 
without any deduction for sales charges. Shares of the Fund may be subject to 
a contingent deferred sales charge, payable to the Distributor, if redeemed 
during the three years after their purchase. DWR compensates its account 
executives by paying them, from its own funds, commissions for the sale of 
the Fund's shares, currently a gross sales credit of up to 3% of the amount 
sold and an annual residual commission of up to .15 of 1% of the current 
value of the amount sold. The gross sales credit is a charge which reflects 
commissions paid by DWR to its account executives 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 share 
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 its 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, such 
assumed interest (computed at the "broker's call rate") has been calculated 
on the gross sales 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. 

   The Fund paid 100% of the $452,823 accrued under the Plan for the fiscal 
year ended September 30, 1996 to the Distributor. The Distributor and DWR 
estimate that they have spent, pursuant to the Plan, $3,273,255 on behalf of 
the Fund since the inception of the Fund. It is estimated that this amount 
was spent in approximately the following ways: (i) 24.42% 
($799,414)--advertising and promotional expenses; (ii) 5.00% 
($163,737)--printing of prospectuses for distribution to other than current 
shareholders; and (iii) 70.58% ($2,310,104)--other expenses, including the 
gross sales credit and the carrying charge, of which 5.10% ($117,707) 
represents carrying charges, 37.77% ($872,574) represents commission credits 
to DWR branch offices for payments of commissions to account executives and 
57.13% ($1,319,823) represents overhead and other branch office 
distribution-related expenses. 

   At any given time, the expenses of 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 

                                      22
<PAGE>

sales charges paid by investors upon redemption of shares. The Distributor 
has advised the Fund that such excess amount, including the carrying charge 
designed to approximate the opportunity costs incurred by DWR 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 shares, totalled 
$2,185,656 as of September 30, 1996. Because there is no requirement under 
the Plan that the Distributor be reimbursed for all its expenses 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 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. 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 to the extent 
that the Distributor, InterCapital, 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. 

   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 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 Trustees shall be 
committed to the discretion of the Independent Trustees. 

DETERMINATION OF NET ASSET VALUE 
- ----------------------------------------------------------------------------- 

   As stated in the Prospectus, 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 market 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. 

   The net asset value per share 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, Presidents' Day, Good Friday, 
Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas 
Day. 

   Portfolio securities (other than short-term debt securities and futures 
and options) are valued for the Fund by an outside independent pricing 
service approved by the Board of Trustees. The pricing service has informed 
the Fund that in valuing the Fund's portfolio securities it uses both a 
computerized grid matrix of tax-exempt securities and evaluations by its 
staff, in each case based on information concerning market transactions and 
quotations from dealers which reflect the bid side of the market each day. 
The Fund's portfolio securities are thus valued by reference to a combination 
of transactions and quotations for the same or other securities believed to 
be comparable in quality, coupon, maturity, type of issue, call provisions, 
trading characteristics and other features deemed to be relevant. The Board 
of 

                                      23
<PAGE>

Trustees believes that timely and reliable market quotations are generally 
not readily available to the Fund for purposes of valuing tax-exempt 
securities and that the valuations supplied by the pricing service, using the 
procedures outlined above and subject to periodic review, are more likely to 
approximate the fair value of such securities. The Investment Manager will 
periodically review and evaluate the procedures, methods and quality of 
services provided by the pricing service then being used by the Fund and may, 
from time to time, recommend to the Board of Trustees the use of other 
pricing services or discontinuance of the use of any pricing service in whole 
or part. The Board may determine to approve such recommendation or take other 
provisions for pricing of the Fund's portfolio securities. 

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, maintained by the Fund's 
Transfer Agent, Dean Witter Trust Company (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 DWR or other selected broker-dealer. 

   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 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 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. 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 at least five business 
days prior to the record date of the dividend or 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 DWR or other 
selected broker-dealer, and will be forwarded to the shareholder, upon the 
receipt of proper instructions. 

   Targeted Dividends. (Service Mark)  In states where it is legally 
permissible, shareholders may also have all income dividends and capital 
gains distributions automatically invested in shares of an open-end Dean 
Witter Fund other than Dean Witter National Municipal Trust. Such investment 
will be made as described above for automatic investment in shares of the 
Fund, at the net asset value per share of the selected Dean Witter Fund as of 
the close of business on the Fund's payment date of the dividend or 
distribution and will begin to earn dividends, if any, in the selected Dean 
Witter Fund the next business day. To participate in the Targeted Dividends 
program, shareholders should contact their DWR or other selected 
broker-dealer account executive or the Transfer Agent. Shareholders of the 
Fund must be shareholders of the 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 Dean Witter 
Fund before entering the program. 

   EasyInvest. (Service Mark)  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, 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 

                                      24
<PAGE>

at the net asset value calculated the same business day the transfer of funds 
is effected. For further information or to subscribe to EasyInvest, 
shareholders should contact their DWR or other selected broker-dealer account 
executive or the Transfer Agent. 

   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 at the net asset value 
next determined by returning the check or the proceeds to the Transfer Agent 
within thirty 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 proceeds by the Transfer 
Agent. 

   Direct Investments through Transfer Agent. A shareholder may make 
additional investments in Fund shares at any time by sending a check in any 
amount, not less than $100, payable to Dean Witter National Municipal Trust, 
directly to the Fund's Transfer Agent. Such amounts will be applied to the 
purchase of Fund shares at the net asset value per share next determined 
after receipt of the check or purchase payment by the Transfer Agent. The 
shares so purchased will be credited to the investor's account. 

   Systematic Withdrawal Plan. As discussed in the Prospectus, a withdrawal 
plan (the "Withdrawal Plan") is available for shareholders who own or 
purchase shares of the Fund having a minimum value of $10,000 based upon 
their current net asset value. The Withdrawal Plan provides for monthly or 
quarterly (March, June, September and December) checks in any dollar amount, 
not less than $25, or in any whole percentage of the account balance, on an 
annualized basis. Any applicable contingent deferred sales charge will be 
imposed on shares redeemed under the Withdrawal Plan (see "Redemptions and 
Repurchases--Contingent Deferred Sales Charge" in the Prospectus). Therefore, 
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 contingent deferred sales charge) to the shareholder will be the 
designated monthly or quarterly amount. 

   Dividends and capital gains distributions on shares held under the 
Withdrawal Plan will be invested in additional full and fractional shares at 
net asset value. Shares will be credited to an open account for the investor 
by the Transfer Agent; no share certificates will be issued. A shareholder is 
entitled to a share certificate upon written request to the Transfer Agent, 
although in that event the shareholder's Withdrawal Plan will be terminated. 

   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 on the tenth or 
twenty-fifth day (or next following business day) of the relevant month or 
quarter and normally a check for the proceeds will be mailed by the Transfer 
Agent within five days after the date of redemption. The Systematic 
Withdrawal Plan may be terminated at any time by the Transfer Agent. 

   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 the 
shareholder may make additional investments of $2,500 or more under the 
Withdrawal Plan, withdrawals made concurrently with purchases of additional 
shares may be inadvisable because of the contingent deferred sales charge 
applicable to the redemption of shares purchased during the preceding six 
years (see "Redemptions and Repurchases--Contingent Deferred Sales Charge"). 

   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 

                                      25
<PAGE>

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 and the address to 
which checks are mailed 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 Systematic Withdrawal Plan at any time by written notice to the 
Transfer Agent. In the event of such termination, the account will be 
continued as a 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. 

EXCHANGE PRIVILEGE 

   As discussed in the Prospectus, the Fund makes available to its 
shareholders an Exchange Privilege whereby shareholders of the Fund may 
exchange their shares for shares of other Dean Witter Funds sold with a 
contingent deferred sales charge ("CDSC funds"), for shares of Dean Witter 
Short-Term Bond Fund, Dean Witter Short-Term U.S. Treasury Trust, Dean Witter 
Limited Term Municipal Trust, Dean Witter Balanced Income Fund, Dean Witter 
Balanced Growth Fund, Dean Witter Intermediate Term U.S. Treasury Trust and 
for shares of five Dean Witter Funds which are money market funds (the 
foregoing eleven non-CDSC funds are hereinafter referred to as the "Exchange 
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 captions "Exchange 
Privilege" and "Contingent Deferred Sales Charge", a contingent deferred 
sales charge ("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 the Fund or 
any other CDSC fund are exchanged for shares of an Exchange Fund, 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 an Exchange Fund, they will be subject to a CDSC which would be based upon 
the period of time the shareholder held shares in a CDSC fund. However, in 
the case of shares exchanged for shares of an Exchange Fund, 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 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 CDSC fund from the Exchange 
Fund, with no CDSC being imposed on such exchange. The holding period 
previously frozen when shares were first exchanged for shares of the Exchange 
Fund resumes on the date shares of a CDSC fund are reacquired. Thus, a CDSC 
is imposed only upon an ultimate redemption, based upon the time (calculated 
as described above) the shareholder was invested in a CDSC fund. 

   If shares of the Fund are exchanged for shares of another CDSC fund having 
a CDSC which is imposed at a higher rate or is subject to a different time 
schedule than the CDSC imposed upon a redemption of a share of the Fund, the 
higher CDSC will be imposed upon redemption of shares of the fund exchanged 
into. Likewise, if shares of another CDSC fund are exchanged for shares of 
the Fund, 

                                      26
<PAGE>

upon redemption of shares of the Fund, a CDSC will be imposed in accordance 
with the CDSC schedule applicable to the fund with the higher CDSC. Moreover, 
if shares of the Fund are exchanged for shares of another CDSC fund with a 
different CDSC schedule imposing a higher CDSC and are subsequently exchanged 
again for shares of the Fund, the higher CDSC will still apply upon ultimate 
redemption of shares of the Fund. 

   In addition, shares of the Fund may be acquired in exchange for shares of 
Dean Witter Funds sold with a front-end sales charge ("front-end sales charge 
funds"), but shares of the Fund, however acquired, may not be exchanged for 
shares of front-end sales charge funds. Shares of a CDSC fund acquired in 
exchange for shares of a front-end sales charge fund (or in exchange for 
shares of other Dean Witter Funds for which shares of a front-end sales 
charge fund have been exchanged) are not subject to any CDSC upon their 
redemption. 

   When shares initially purchased in a CDSC fund are exchanged for shares of 
another CDSC fund, or for 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 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 (of the Fund or another 
Dean Witter Fund) and (iii) acquired in exchange for shares of front-end 
sales charge funds, or for shares of other Dean Witter Funds for which shares 
of front-end sales charge funds have been exchanged (all such shares called 
"Free Shares"), will be exchanged first. Shares of Dean Witter Strategist 
Fund acquired prior to November 8, 1989, shares of Dean Witter American Value 
Fund acquired prior to April 30, 1984, and shares of Dean Witter Dividend 
Growth Securities Inc. and Dean Witter Natural Resource Development 
Securities Inc. acquired prior to July 2, 1984, are also considered Free 
Shares and will be the first Free Shares to be exchanged. 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 if shares held for identical periods of 
time but subject to different CDSC schedules are held in a block 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 "Contingent Deferred Sales Charge", 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 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. 

                                      27
<PAGE>

   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 is $5,000 
for Dean Witter Liquid Asset Fund Inc., Dean Witter Tax-Free Daily Income 
Trust, Dean Witter New York Municipal Money Market Trust and Dean Witter 
California Tax-Free Daily Income Trust although those funds may, at their 
discretion, accept initial investments of as low as $1,000. The minimum 
initial investment for Dean Witter Short-Term U.S. Treasury Trust is $10,000 
although that fund may, at its discretion, accept initial investments of as 
low as $5,000. The minimum initial investment is $5,000 for Dean Witter 
Special Value Fund. The minimum initial investment for all other 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 Exchange Funds, including the 
check writing feature, will not be available for funds held in that account. 

   The Fund and each of the other 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 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(s), policies and restrictions. 

   For further information regarding the Exchange Privilege, shareholders 
should contact their DWR or other selected broker-dealer account executive or 
the Transfer Agent. 

REDEMPTIONS AND REPURCHASES 
- ----------------------------------------------------------------------------- 

   Redemption. As stated in the Prospectus, shares of the Fund can be 
redeemed for cash at any time at the net asset value per share next 
determined; however, such redemption proceeds may be reduced by the amount of 
any applicable contingent deferred sales charges (see below). 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. 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" in the Prospectus) after 
it receives the request, and 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 

                                      28
<PAGE>

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 the shareholder 
at an address other than the registered address, signatures 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 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 revised prospectus. 

   Contingent Deferred Sales Charge. As stated in the Prospectus, a 
contingent deferred sales charge ("CDSC") will be imposed on any redemption 
by an investor if after such redemption the current value of the investor's 
shares of the Fund is less than the dollar amount of all payments by the 
shareholder for the purchase of Fund shares during the preceding 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 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 Dean Witter Fund (see "Shareholder 
Services--Targeted Dividends"), plus (c) the current net asset value of 
shares acquired in exchange for (i) shares of Dean Witter front-end sales 
charge funds, or (ii) shares of other 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 three years. The CDSC will be paid to 
the Distributor. In addition, no CDSC will be imposed on redemptions of 
shares which were purchased by certain Unit Investment Trusts (on which a 
sales charge has been paid) or which are attributable to reinvestment of 
dividends or distributions from, or the proceeds of, such Unit Investment 
Trusts. 

   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 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 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 Dean Witter front-end sales 
charge funds, or for shares of other 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 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 Fund shares 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 the month. The following table sets forth the rates of the CDSC: 

<TABLE>
<CAPTION>
                             CONTINGENT DEFERRED 
        YEAR SINCE            SALES CHARGE AS A 
         PURCHASE               PERCENTAGE OF 
       PAYMENT MADE            AMOUNT REDEEMED 
       ------------            --------------- 
<S>                                  <C>
First.....................           3.0% 
Second....................           2.0% 
Third.....................           1.0% 
Fourth and thereafter ....           None 
</TABLE>

                                      29
<PAGE>

   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 three year period. This will result in any such CDSC being 
imposed at the lowest possible rate. Accordingly, shareholders may redeem, 
without incurring any CDSC, amounts equal to any net increase in the value of 
their shares above the amount of their purchase payments made within the past 
three years and amounts equal to the current value of shares purchased more 
than three years prior to the redemption and shares purchased through 
reinvestment of dividends or distributions or acquired in exchange for shares 
of Dean Witter front-end sales charge funds, or for shares of other Dean 
Witter Funds for which shares of front-end sales charge funds have been 
exchanged. The CDSC will be imposed in accordance with the table shown above, 
on any redemptions within three years of purchase which are in excess of 
these amounts and which redemptions are not (a) requested within one year of 
death or initial determination of disability of a shareholder, or (b) made 
pursuant to certain taxable distributions from retirement plans or retirement 
accounts, as described in the Prospectus. 

   Payment for Shares Redeemed or Repurchased. As discussed in the 
Prospectus, 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. 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. 
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 or bank cashier's check), 
payment of 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 investment of the proceeds of the check by the 
Transfer Agent). Shareholders maintaining margin accounts with DWR or another 
selected broker-dealer are referred to their account executive 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 contingent deferred sales charge 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 contingent deferred sales charge as 
if they had not been so transferred. 

   Reinstatement Privilege. As described in the Prospectus, a shareholder who 
has had his or her shares redeemed or repurchased and has not previously 
exercised this reinstatement privilege may, within 30 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 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. 

   Involuntary Redemption. As described in the Prospectus, due to the 
relatively high cost of handling small investments, the Fund reserves the 
right to redeem, at net asset value, the shares of any 

                                      30
<PAGE>

shareholder whose shares have a value of less than $100, or such lesser 
amount as may be fixed by the Board of Trustees. 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 $100 and allow him 
or her sixty days to make an additional investment in an amount which will 
increase the value of his or her account to $100 or more before the 
redemption is processed. 

DIVIDENDS, DISTRIBUTIONS AND TAXES 
- ----------------------------------------------------------------------------- 

   Each shareholder will receive at least a quarterly summary of his or her 
account, including information as to reinvested dividends and capital gains 
distributions. Share certificates for dividends or distributions will not be 
issued unless a shareholder requests in writing that a certificate be issued 
for a specific number of shares. 

   In computing net investment income, the Fund will amortize any premiums 
and original issue discounts on securities owned, if applicable. Capital 
gains or losses realized upon sale or maturity of such securities will be 
based on their amortized cost. 

   Gains or losses on the 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 capital gains or losses. 

   The Fund has qualified and intends to remain qualified as a regulated 
investment company under Subchapter M of the Internal Revenue Code. If so 
qualified, the Fund will not be subject to federal income tax on its net 
investment income and capital gains, if any, realized during any fiscal year 
to the extent that it distributes such income and capital gains to its 
shareholders. 

   With respect to the Fund's investments in zero coupon bonds, the Fund 
accrues income prior to any actual cash payments by their issuers. In order 
to continue to comply with Subchapter M of the Internal Revenue Code and 
remain able to forego payment of federal income tax on its income and capital 
gains, the Fund must distribute all of its net investment income, including 
income accrued from zero coupon bonds. As such, the Fund may be required to 
dispose of some of its portfolio securities under disadvantageous 
circumstances to generate the cash required for distribution. 

   As discussed in the Prospectus, the Fund intends to qualify to pay 
"exempt-interest dividends" to its shareholders by maintaining, as of the 
close of each of its taxable years, at least 50% of the value of its assets 
in tax-exempt securities. An exempt-interest dividend is that part of the 
dividend distributions made by the Fund which consists of interest received 
by the Fund on tax-exempt securities upon which the shareholder incurs no 
federal income taxes. Exempt-interest dividends are included, however, in 
determining what portion, if any, of a person's Social Security benefits are 
subject to federal income tax. 

   As also discussed in the Prospectus, the Fund intends to invest a portion 
of its assets in certain "private activity bonds" issued after August 7, 
1986. As a result, a portion of the exempt-interest dividends paid by the 
Fund will be an item of tax preference to shareholders subject to the 
alternative minimum tax. Certain corporations which are subject to the 
alternative minimum tax may also have to include exempt-interest dividends in 
calculating their alternative minimum taxable income in situations where the 
"adjusted current earnings" of the corporation exceeds its alternative 
minimum taxable income. 

   Within sixty days after the end of its fiscal year, the Fund will mail to 
shareholders a statement indicating the percentage of the dividend 
distributions for each fiscal year which constitutes exempt-interest 
dividends, the percentage, if any, that is taxable, and the percentage, if 
any, of the exempt-interest dividends which constitutes an item of tax 
preference, and to what extent the taxable portion is long-term capital gain, 
short-term capital gain or ordinary income. This percentage should be applied 
uniformly to all monthly distributions made during the fiscal year to 
determine the proportion of dividends that is tax-exempt. The percentage may 
differ from the percentage of tax-exempt dividend distributions for any 
particular month. 

   Shareholders will be subject to federal income tax on dividends paid from 
interest income derived from taxable securities and on distributions of net 
short-term capital gains. Such dividends and 

                                      31
<PAGE>

distributions are taxable to the shareholder as ordinary dividend income 
regardless of whether the shareholder receives such distributions in 
additional shares or in cash. Distributions of long-term capital gains, if 
any, are taxable as long-term capital gains, regardless of how long the 
shareholder has held the Fund shares and regardless of whether the 
distribution is received in additional shares or in cash. Since the Fund's 
income is expected to be derived entirely from interest rather than 
dividends, it is anticipated that no portion of such dividend distributions 
will be eligible for the federal dividends received deduction available to 
corporations. 

   Interest on indebtedness incurred by shareholders to purchase or carry 
shares of the Fund is not deductible. Furthermore, entities or persons who 
are "substantial users" (or related persons) of facilities financed by 
industrial development bonds should consult their tax advisers before 
purchasing shares of the Fund. "Substantial user" is defined generally by 
Income Tax Regulation 1.103-11(b) as including a "non-exempt person" who 
regularly uses in a trade or business a part of a facility financed from the 
proceeds of industrial development bonds. 

   From time to time, proposals have been introduced before Congress for the 
purpose of restricting or eliminating the federal income tax exemption for 
interest on municipal securities. Similar proposals may be introduced in the 
future. If such a proposal were enacted, the availability of municipal 
securities for investment by the Fund could be affected. In that event, the 
Fund would re-evaluate its investment objective and policies. 

   Any dividends or capital gains distributions received by a shareholder 
from any investment company will have the effect of reducing the net asset 
value of the shareholder's shares in that fund by the exact amount of the 
dividend or capital gains distribution. Furthermore, capital gains 
distributions are, and some portion of the dividends may be, subject to 
income tax. If the net asset value of the shares should be reduced below a 
shareholder's cost as a result of the payment of taxable dividends or the 
distribution of capital gains, such payment or distribution would be in part 
a return of capital but nonetheless taxable to the shareholder. Therefore, an 
investor should consider the tax implications of purchasing Fund shares 
immediately prior to a distribution record date. 

   Shareholders should consult their tax advisers regarding specific 
questions as to 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. 
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 as described 
below; 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". The resulting amount is divided by the product of 
the maximum offering price per share on the last day of the period (reduced 
by any undeclared earned income per share that is expected to be declared 
shortly after the end of the period) multiplied by the average number of Fund 
shares 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. 

   To determine interest income from debt obligations, a yield-to-maturity, 
expressed as a percentage, is determined for obligations held at the 
beginning of the period, based on the current market value of the security 
plus accrued interest, generally as of the end of the month preceding the 
30-day period, or, for obligations purchased during the period, based on the 
cost of the security (including accrued interest). The yield-to-maturity is 
multiplied by the market value (plus accrued interest) for each security and 
the result is divided by 360 and multiplied by 30 days or the number of days 
the security was held during the period, if less. Modifications are made for 
determining yield-to-maturity on certain tax-exempt securities. For the 
30-day period ended September 30, 1996, the Fund's yield, calculated pursuant 
to the formula described above was 4.50%. During this period, InterCapital 
waived its management fee and assumed certain expenses of the Fund. Had the 
Fund borne these expenses and paid the management fee for the period, the 
yield for the 30-day period would have been 4.38%. 

                                      32
<PAGE>

   The Fund may also quote a "tax-equivalent yield" determined by dividing 
the tax-exempt portion of quoted yield by 1 minus the stated income tax rate 
and adding the result to the portion of the yield that is not tax-exempt. The 
Fund's tax-equivalent yield, based upon a Federal personal income tax bracket 
of 39.6% for the 30-day period ended September 30, 1996 was 7.45% based upon 
the yield calculated above. Without the waiver of the management fee or the 
assumption of certain expenses, the Fund's tax-equivalent yield for the 
period would have been 7.25%. 

   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 contingent deferred sales charge 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 return of the Fund for the fiscal 
year ended September 30, 1996 and for the period June 2, 1994 (commencement 
of operations) through September 30, 1996 was 2.94% and 6.40%, respectively. 
During this period, InterCapital waived its management fee and assumed 
certain expenses of the Fund. Had the Fund borne these expenses and paid 
these fees for the fiscal year ended September 30, 1996 and during the stated 
period, the average annual total return for the period would have been 2.73% 
and 6.09% respectively. 

   In addition to the foregoing, the Fund may advertise its total return over 
different periods of time by means of aggregate, average, year-by-year or 
other types of total return figures. Such calculation may or may not reflect 
the deduction of the contingent deferred sales charge which, if reflected, 
would reduce the performance quoted. For example, the average annual total 
return of the Fund may be calculated in the manner described in the preceding 
paragraph, but without the deduction for any applicable contingent deferred 
sales charge. Based on this calculation, the Fund's average annual total 
return for the fiscal year ended September 30, 1996 and for the period June 
2, 1994 (commencement of operations) through September 30, 1996 was 5.94% and 
6.80%, respectively. 

   In addition, the Fund may compute its aggregate total return 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 contingent deferred sales charge) by the initial $1,000 
investment and subtracting 1 from the result. Based on the foregoing 
calculation, the Fund's total return for the fiscal year ended September 30, 
1996 and for the period June 2, 1994 (commencement of operations) through 
September 30, 1996 was 5.94% and 16.56%, respectively. 

   The Fund may also advertise the growth of hypothetical investments of 
$10,000, $50,000 and $100,000 in 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 contingent deferred sales charge) 
and multiplying by $10,000, $50,000 or $100,000 as the case may be. 
Investments of $10,000, $50,000 and $100,000 in the Fund since inception 
would have grown to $11,656, $58,280, and $116,560, respectively, at 
September 30, 1996. 

   The Fund from time to time may also advertise its performance relative to 
certain performance rankings and indexes compiled by independent 
organizations. 

DESCRIPTION OF SHARES 
- ----------------------------------------------------------------------------- 

   The Shareholders of the Fund are entitled to a full vote for each full 
share of beneficial interest held. The Fund is authorized to issue an 
unlimited number of shares of beneficial interest. The Trustees themselves 
have the power to alter the number and the terms of office of the Trustees 
(as provided for 

                                      33
<PAGE>

in the Declaration of Trust), and they may at any time lengthen or shorten 
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 Declaration of Trust permits the Trustees to authorize the creation of 
additional series of shares (the managed portfolios) and additional classes 
of shares within any series (which would be used to distinguish among the 
rights of different categories of shareholders, as might be required by 
future regulations or other unforeseen circumstances). The Trustees have not 
presently authorized any such additional series or classes of shares. 

   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 duties. It also provides that all third persons 
shall look solely to the Fund property for satisfaction of claims arising in 
connection with the affairs of the Fund. With the exceptions stated above, 
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 shall be of unlimited duration subject to the provisions in the 
Declaration of Trust concerning termination by action of the shareholders or 
the Trustees. 

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. The Custodian has no part in deciding the 
Fund's investment policies or which securities are to be purchased or sold 
for the Fund's portfolio. 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. 

   Dean Witter Trust Company, 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. Dean Witter Trust Company is an affiliate of Dean Witter InterCapital 
Inc., the Fund's Investment Manager, and Dean Witter Distributors Inc., the 
Fund's Distributor. As Transfer Agent and Dividend Disbursing Agent, Dean 
Witter Trust Company's responsibilities include maintaining shareholder 
accounts, including providing subaccounting and recordkeeping services for 
certain retirement 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 Dean Witter 
Trust Company receives a per shareholder account fee from the Fund. 

INDEPENDENT ACCOUNTANTS 
- ----------------------------------------------------------------------------- 

   Price Waterhouse LLP serves as the independent accountants of the Fund. 
The independent accountants are responsible for auditing the annual financial 
statements of the Fund. 

                                      34
<PAGE>

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 audited by independent accountants, will be 
sent to shareholders each year. 

   The Fund's fiscal year is September 30. 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 
- ----------------------------------------------------------------------------- 

   Sheldon Curtis, 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 year ended September 
30, 1996, 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 Price Waterhouse 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. 

                                      35
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
PORTFOLIO OF INVESTMENTS September 30, 1996 

<TABLE>
<CAPTION>
 PRINCIPAL 
 AMOUNT IN                                                                    COUPON    MATURITY 
 THOUSANDS                                                                     RATE       DATE        VALUE 
- -------------------------------------------------------------------------------------------------------------- 
<S>         <C>                                                                <C>      <C>       <C>
            MUNICIPAL BONDS (92.4%) 
            General Obligation (21.4%) 
            North Slope Borough, Alaska, 
   $3,000    Ser 1994 B (FSA) ...............................................  0.00 %   06/30/05   $1,872,480 
    3,925    Ser 1996 B (MBIA) ..............................................  0.00     06/30/06    2,299,422 
    1,000   Santa Margarita/Dana Point Authority, California, Impr Dists #3, 
             3A, 4 & 4A 1994 Ser B Refg (MBIA) ..............................  5.75     08/01/20      992,220 
    1,000   Atlanta, Georgia, Public Impr Ser 1994 A ........................  6.125    12/01/23    1,027,700 
    1,500   Hawaii, 1995 Ser C J ............................................  6.25     01/01/15    1,563,570 
    2,000   Chicago, Illinois, Refg Ser 1995 B (FGIC) .......................  5.125    01/01/25    1,818,480 
    1,000   Chicago Park District, Illinois, Ser 1995 .......................  6.60     11/15/14    1,068,440 
    1,000   Chelsea, Massachusetts, School Act of 1948 (AMBAC) ..............  6.50     06/15/12    1,082,430 
    1,000   Massachusetts, 1994 Ser C (FGIC) ................................  6.75     11/01/12    1,099,470 
    1,500   New York City, New York, 1995 Ser D (MBIA) ......................  6.20     02/01/07    1,621,140 
    1,000   Delaware City School District, Ohio, Constr & Impr dtd 08/15/95 
             (FGIC) .........................................................  5.75     12/01/20      997,320 
    2,000   Washington, 1994 Ser A  .........................................  5.80     09/01/08    2,055,300 
- -----------                                                                                       ------------ 
   19,925                                                                                          17,497,972 
- -----------                                                                                       ------------ 
            Educational Facilities Revenue (5.1%) 
    1,000   California Educational Facilities Authority, Claremont Colleges 
             Ser 1992 .......................................................  6.375    05/01/22    1,031,730 
      500   Atlanta Urban Residential Finance Authority, Georgia, Morehouse 
             College Refg Ser 1995 (MBIA) ...................................  5.75     12/01/14      505,295 
    2,000   New Jersey Economic Development Authority, Educational Testing 
             Service Ser 1995 (MBIA) ........................................  6.125    05/15/15    2,073,340 
      500   New York State Dormitory Authority, City University 1994 3rd 
             Resolution Ser 1 (AMBAC) .......................................  6.30     07/01/24      524,060 
- -----------                                                                                       ------------ 
    4,000                                                                                           4,134,425 
- -----------                                                                                       ------------ 
            Electric Revenue (5.3%) 
    1,500   Puerto Rico Electric Power Authority, Power Ser X ...............  6.00     07/01/15    1,508,100 
    1,000   Austin, Texas, Combined Utilities Refg Ser 1994 (FGIC) ..........  6.25     05/15/16    1,052,010 
    2,000   Intermountain Power Agency, Utah, Refg 1996 Ser D ...............  5.00     07/01/21    1,786,140 
- -----------                                                                                       ------------ 
    4,500                                                                                           4,346,250 
- -----------                                                                                       ------------ 
            Hospital Revenue (13.7%) 
    1,465   Birmingham-Carraway Special Care Facilities Financing 
             Authority, Alabama, Carraway Methodist Health Ser 1995-A 
             (Connie Lee) ...................................................  6.25     08/15/09    1,547,274 
      500   Rancho Mirage Joint Powers Financing Authority, California, 
             Eisenhower Memorial Hospital COPs ..............................  7.00     03/01/22      538,740 
    2,000   Orange County Health Facilities Authority, Florida, Adventist 
             Health/Sunbelt Obligated Group Ser 1995 (AMBAC) ................  5.25     11/15/20    1,867,780 
    1,000   Maryland Health & Higher Educational Facilities Authority, 
             Kernan Hospital Ser 1994 (Connie Lee) ..........................  6.10     07/01/24    1,009,390 
    1,300   New Hampshire Higher Educational & Health Facilities Authority, 
             St Joseph Hospital Ser 1994 (Connie Lee) .......................  6.35     01/01/07    1,369,368 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      36
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
PORTFOLIO OF INVESTMENTS September 30, 1996, continued 

 PRINCIPAL 
 AMOUNT IN                                                                    COUPON    MATURITY 
 THOUSANDS                                                                     RATE       DATE        VALUE 
- -------------------------------------------------------------------------------------------------------------- 
   $2,000   University of North Carolina, Hospitals at Chapel Hill Ser 1996    5.25 %   02/15/19   $1,874,860 
    3,000   Jackson, Tennessee, Jackson-Madison County General Hospital 
             Refg & Impr Ser 1995 (AMBAC) ...................................  5.625    04/01/15    2,960,970 
- -----------                                                                                       ------------ 
   11,265                                                                                          11,168,382 
- -----------                                                                                       ------------ 
            Industrial Development/Pollution Control Revenue (4.5%) 
    1,500   Hawaii Department of Budget & Finance, Hawaiian Electric Co 
             Ser 1995 A (AMT)(MBIA) .........................................  6.60     01/01/25    1,604,775 
    2,000   New York State Energy Research & Development Authority, 
             New York State Electric & Gas Corp 1987 Ser A (AMT)(MBIA) ......  6.15     07/01/26    2,024,880 
- -----------                                                                                       ------------ 
    3,500                                                                                           3,629,655 
- -----------                                                                                       ------------ 
            Mortgage Revenue-Multi-Family (1.9%) 
      500   Honolulu, Hawaii, Waipahu Towers GNMA Collateralized 1995 Ser A 
             (AMT) ..........................................................  6.90     06/20/35      527,055 
    1,000   Massachusetts Housing Finance Agency, Rental 1994 Ser A 
             (AMT)(AMBAC) ...................................................  6.65     07/01/19    1,032,440 
- -----------                                                                                       ------------ 
    1,500                                                                                           1,559,495 
- -----------                                                                                       ------------ 
            Mortgage Revenue-Single Family (4.8%) 
    2,000   Alaska Housing Finance Corporation, Governmental 1995 Ser A 
             (MBIA) .........................................................  5.875    12/01/24    1,982,120 
    1,000   Tennessee Housing Development Agency, Finance 1994 Ser B (AMT) ..  6.55     07/01/19    1,025,210 
      900   Utah Housing Finance Agency, Federally Insured/Guaranteed Loans 
             1994 Issue E (AMT) .............................................  6.50     07/01/26      921,411 
- -----------                                                                                       ------------ 
    3,900                                                                                           3,928,741 
- -----------                                                                                       ------------ 
            Public Facilities Revenue (3.7%) 
            North City West School Facilities Financing Authority, 
             California, 
    1,000    Community Facs Dist #1 Special Tax Ser 1995 B (FSA) ............  5.75     09/01/15      996,520 
    2,000    Community Facs Dist #1 Special Tax Ser 1995 B (FSA) ............  6.00     09/01/19    2,025,380 
- -----------                                                                                       ------------ 
    3,000                                                                                           3,021,900 
- -----------                                                                                       ------------ 
            Transportation Facilities Revenue (14.3%) 
    2,000   Dade County, Florida, Seaport Refg Ser 1996 (MBIA) ..............  5.125    10/01/16    1,870,580 
    1,000   Lee County, Florida, Ser 1995 (MBIA) ............................  5.75     10/01/22      998,660 
      850   Regional Transportation Authority, Illinois, Ser 1994 A .........  6.25     06/01/15      890,740 
    1,000   Kentucky Turnpike Authority, Economic Development Road 
             Revitalization Refg Ser 1995 (AMBAC) ...........................  5.625    07/01/15    1,000,300 
    2,500   Maine Turnpike Authority, Ser 1994 (MBIA) .......................  6.00     07/01/18    2,549,625 
    1,000   New York State Thruway, Authority General 1995 Ser C (FGIC) .....  6.00     01/01/25    1,015,190 
    1,500   Port Authority of New York & New Jersey, Cons One Hundredth Ser 
             Second Installment + ...........................................  5.75     12/15/20    1,486,305 
    2,000   Texas Turnpike Authority, Dallas North Tollway Refg Ser (FGIC) ..  5.25     01/01/23    1,875,440 
- -----------                                                                                       ------------ 
   11,850                                                                                          11,686,840 
- -----------                                                                                       ------------ 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      37
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
PORTFOLIO OF INVESTMENTS September 30, 1996, continued 

 PRINCIPAL 
 AMOUNT IN                                                                    COUPON    MATURITY 
 THOUSANDS                                                                     RATE       DATE        VALUE 
- -------------------------------------------------------------------------------------------------------------- 
            Water & Sewer Revenue (11.8%) 
   $1,000   Birmingham Waterworks & Sewer Board, Alabama, Ser 1993-A  .......  6.00 %   01/01/20   $1,016,800 
    1,000   Castaic Lake Water Agency, California, Refg Ser 1994 A COPs 
             (MBIA) .........................................................  6.00     08/01/18    1,013,240 
    1,000   Dade County, Florida, Water & Sewer Ser 1995 (FGIC)  ............  5.50     10/01/15      980,380 
    1,000   Chicago, Illinois, Wastewater Ser 1994 (MBIA) ...................  6.375    01/01/24    1,052,550 
    2,000   Massachusetts Water Resources Authority, 1992 Ser A .............  6.50     07/15/07    2,205,520 
    2,000   Asheville, North Carolina, Water Ser 1996 (FGIC)(WI) ............  5.70     08/01/25    1,988,620 
    1,250   Philadelphia, Pennsylvania, Water & Wastewater Ser 1995 (MBIA) ..  6.25     08/01/11    1,346,763 
- -----------                                                                                       ------------ 
    9,250                                                                                           9,603,873 
- -----------                                                                                       ------------ 
            Other Revenue (3.8%) 
    2,000   Mashantucket (Western) Pequot Tribe, Connecticut, Special 1996 
             Ser A (a)(WI)  .................................................  6.50     09/01/05    2,044,620 
    1,000   New Jersey Economic Development Authority, Market Transition Sr 
             Lien Ser 1994 A (MBIA) .........................................  5.875    07/01/11    1,022,610 
- -----------                                                                                       ------------ 
    3,000                                                                                           3,067,230 
- -----------                                                                                       ------------ 
            Refunded (2.1%) 
      500   Glendale Industrial Development Authority, Arizona, Thunderbird 
             - The American Graduate School of International Management Ser 
             1994 (Connie Lee) ..............................................  7.125    07/01/05++    576,230 
    1,000   Essex County Improvement Authority, New Jersey, County Jail & 
             Youth House Ser 1994 (AMBAC) ...................................  6.90     12/01/04++  1,146,700 
- -----------                                                                                       ------------ 
    1,500                                                                                           1,722,930 
- -----------                                                                                       ------------ 
   77,190   TOTAL MUNICIPAL BONDS (Identified Cost $72,847,380)  ................................. 75,367,693 
- -----------                                                                                       ------------ 
            SHORT-TERM MUNICIPAL OBLIGATIONS (10.5%) 
    3,100   Valdez, Alaska, Marine Terminal Exxon Pipeline Co 1993 Ser C 
             (Demand 10/01/96) ..............................................  3.70 *   12/01/33    3,100,000 
    2,600   Philadelphia Hospitals & Higher Education Facilities Authority, 
             Pennsylvania, Children's Hospital of Philadelphia 1996 Ser A 
             (Demand 10/01/96) ..............................................  4.00 *   03/01/27    2,600,000 
    2,900   Metropolitan Nashville Airport Authority, Tennessee, American 
             Airlines Inc Refg Ser 1995 A (Demand 10/01/96) .................  3.90 *   10/01/12    2,900,000 
- -----------                                                                                       ------------ 
    8,600   TOTAL SHORT-TERM MUNICIPAL OBLIGATIONS (Identified Cost $8,600,000)  .................  8,600,000 
- -----------                                                                                       ------------ 
</TABLE>

<TABLE>
<CAPTION>
<S>       <C>                                                                            <C>      <C>
 $85,790  TOTAL INVESTMENTS (Identified Cost $81,447,380) (b)  .........................  102.9%   83,967,693 
========= 
          LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS  ..............................   (2.9)   (2,351,488)
                                                                                       -------- ------------- 
          NET ASSETS  ..................................................................  100.0%  $81,616,205 
                                                                                       ======== ============= 
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      38
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
PORTFOLIO OF INVESTMENTS September 30, 1996, continued 

- ------------ 
AMT      Alternative Minimum Tax. 
COPs     Certificates of Participation. 
WI       Security purchased on a when issued basis. 
+        Joint exemption in New York and New Jersey. 
++       Prerefunded to call date shown. 
*        Current coupon of variable rate security. 
(a)      Resale is restricted to qualified institutional investors. 
(b)      Cost is the same for federal income tax purposes. 

Bond Insurance: 
- --------------- 
AMBAC       AMBAC Indemnity Corporation. 
Connie Lee  Connie Lee Insurance Company. 
FGIC        Financial Guaranty Insurance Company. 
FSA         Financial Security Assurance Inc. 
MBIA        Municipal Bond Investors Assurance Corporation. 

                      Geographic Summary of Investments 
               Based on Market Value as a Percent of Net Assets 
                              September 30, 1996 

<TABLE>
<CAPTION>
<S>              <C>
Alabama..........     3.1% 
Alaska...........    11.3 
Arizona..........     0.7 
California.......     8.1 
Connecticut......     2.5 
Florida..........     7.0 
Georgia..........     1.9 
Hawaii...........     4.5% 
Illinois.........     5.8 
Kentucky.........     1.2 
Maine............     3.1 
Maryland.........     1.2 
Massachusetts ...     6.6 
New Hampshire ...     1.7 
New Jersey.......     7.0% 
New York.........     8.2 
North Carolina ..     4.8 
Ohio.............     1.2 
Pennsylvania.....     5.2 
Puerto Rico......     1.8 
Tennessee........     8.4 
Texas............     3.6% 
Utah ............     3.3 
Washington.......     2.5 
Joint 
 Exemptions......    (1.8) 
                    -----
Total............   102.9% 
                    =====
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      39
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
FINANCIAL STATEMENTS 

STATEMENT OF ASSETS AND LIABILITIES 
September 30, 1996 

<TABLE>
<CAPTION>
<S>                                         <C>
ASSETS: 
Investments in securities, at value 
 (identified cost $81,447,380)..............  $83,967,693 
Cash........................................      350,356 
Receivable for: 
  Interest..................................    1,126,539 
  Shares of beneficial interest sold .......      241,456 
Deferred organizational expenses............       78,955 
Receivable from affiliate...................       10,951 
Prepaid expenses............................       19,323 
                                            ------------- 
  TOTAL ASSETS..............................   85,795,273 
                                            ------------- 
LIABILITIES: 
Payable for: 
  Investments purchased.....................    4,032,643 
  Plan of distribution fee..................       40,917 
  Dividends to shareholders.................       39,805 
  Investment management fee.................       15,286 
  Shares of beneficial interest 
 repurchased................................        2,118 
Accrued expenses ...........................       48,299 
                                            ------------- 
  TOTAL LIABILITIES.........................    4,179,068 
                                            ------------- 
NET ASSETS: 
Paid-in-capital.............................   79,147,068 
Net unrealized appreciation ................    2,520,313 
Accumulated undistributed net investment 
 income.....................................        2,992 
Accumulated net realized loss...............      (54,168) 
                                            ------------- 
  NET ASSETS................................  $81,616,205 
                                            ============= 
NET ASSET VALUE PER SHARE, 
 7,772,649 shares outstanding (unlimited 
 shares authorized of $.01 par value) ......  $     10.50 
                                            ============= 
</TABLE>

STATEMENT OF OPERATIONS 
For the year ended September 30, 1996 

<TABLE>
<CAPTION>
<S>                                     <C>
NET INVESTMENT INCOME: 
INTEREST INCOME ........................  $4,386,918 
                                        ------------ 
EXPENSES 
Plan of distribution fee................     452,823 
Investment management fee...............     269,889 
Professional fees ......................      49,943 
Shareholder reports and notices ........      33,248 
Transfer agent fees and expenses .......      32,563 
Organizational expenses ................      28,158 
Registration fees ......................      26,027 
Trustees' fees and expenses.............      10,808 
Custodian fees..........................       4,197 
Other...................................      11,603 
                                        ------------ 
  TOTAL EXPENSES BEFORE EXPENSE OFFSET 
  AND AMOUNTS REIMBURSED/WAIVED.........     919,259 
  LESS: AMOUNTS REIMBURSED/WAIVED ......    (165,054) 
  LESS: EXPENSE OFFSET .................      (4,149) 
                                        ------------ 
  TOTAL EXPENSES AFTER EXPENSE OFFSET 
  AND AMOUNTS REIMBURSED/WAIVED.........     750,056 
                                        ------------ 
  NET INVESTMENT INCOME.................   3,636,862 
                                        ------------ 
NET REALIZED AND UNREALIZED GAIN 
 (LOSS): 
Net realized loss ......................     (54,168) 
Net change in unrealized appreciation ..     432,258 
                                        ------------ 
  NET GAIN..............................     378,090 
                                        ------------ 
NET INCREASE............................  $4,014,952 
                                        ============ 
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      40
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
FINANCIAL STATEMENTS, continued 

STATEMENT OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                           FOR THE YEAR       FOR THE YEAR 
                                                              ENDED              ENDED 
                                                        SEPTEMBER 30, 1996 SEPTEMBER 30, 1995 
- ----------------------------------------------------------------------------------------------
<S>                                                        <C>                <C>
INCREASE (DECREASE) IN NET ASSETS: 
OPERATIONS: 
Net investment income .................................    $ 3,636,862        $ 2,229,414 
Net realized gain (loss)...............................        (54,168)               776 
Net change in unrealized appreciation/depreciation ....        432,258          2,452,914 
                                                           -----------        -----------
  NET INCREASE.........................................      4,014,952          4,683,104 
DIVIDENDS AND DISTRIBUTIONS FROM: 
Net investment income..................................     (3,642,942)        (2,220,342) 
Net realized gain......................................           (776)            -- 
                                                           -----------        -----------
  TOTAL................................................     (3,643,718)        (2,220,342) 
Net increase from transactions in shares of beneficial 
 interest..............................................     16,969,296         31,953,161 
                                                           -----------        -----------
  TOTAL INCREASE.......................................     17,340,530         34,415,923 
NET ASSETS: 
Beginning of period....................................     64,275,675         29,859,752 
                                                           -----------        -----------
  END OF PERIOD 
  (Including undistributed net investment income of 
  $2,992 and $9,072, respectively).....................    $81,616,205        $64,275,675 
                                                           ===========        ===========
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      41
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
NOTES TO FINANCIAL STATEMENTS September 30, 1996 

1. ORGANIZATION AND ACCOUNTING POLICIES 

Dean Witter National Municipal Trust (the "Fund") 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 to 
provide a high level of current income which is exempt from federal income 
tax, consistent with the preservation of capital. The Fund was organized as a 
Massachusetts business trust on March 29, 1994 and commenced operations on 
June 2, 1994. 

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 -- Portfolio securities are valued by an outside 
independent pricing service approved by the Trustees. The pricing service has 
informed the Fund that in valuing the portfolio securities, it uses both a 
computerized matrix of tax-exempt securities and evaluations by its staff, in 
each case based on information concerning market transactions and quotations 
from dealers which reflect the bid side of the market each day. The portfolio 
securities are thus valued by reference to a combination of transactions and 
quotations for the same or other securities believed to be comparable in 
quality, coupon, maturity, type of issue, call provisions, trading 
characteristics and other features deemed to be relevant. 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 by the identified cost 
method. Discounts are accreted and premiums are amortized over the life of 
the respective securities. Interest income is accrued daily. 

C. 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 and nontaxable income to its 
shareholders. Accordingly, no federal income tax provision is required. 

D. 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 

                                      42
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
NOTES TO FINANCIAL STATEMENTS September 30, 1996, continued 

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 
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. 

E. ORGANIZATIONAL EXPENSES -- Dean Witter InterCapital Inc. (the "Investment 
Manager") paid the organizational expenses of the Fund in the amount of 
$148,017 which were reimbursed exclusive of $46,853 which was absorbed by the 
Investment Manager. Such expenses have been deferred and are being amortized 
on the straight-line method over a period not to exceed five years from the 
commencement of operations. 

2. INVESTMENT MANAGEMENT AGREEMENT 

Pursuant to an Investment Management Agreement, the Fund pays the Investment 
Manager a management fee, accrued daily and payable monthly, by applying the 
annual rate of 0.35% to the Fund's net assets determined as of the close of 
each business day. 

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. 

The Investment Manager had undertaken to assume all expenses (except for the 
plan of distribution fee and brokerage fees) and waive the compensation 
provided for in the Agreement until December 31, 1995. For the period January 
1, 1996 through June 30, 1997, the Investment Manager will continue to waive 
the management fee and reimburse expenses (except for the plan of distribution 
fee and brokerage fees) to the extent they exceed 0.50% of daily net assets. At
September 30, 1996, included in the Statement of Assets and Liabilities, is a 
receivable from the Investment Manager which represents expense reimbursements 
due to the Fund. 

                                      43
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
NOTES TO FINANCIAL STATEMENTS September 30, 1996, continued 

3. PLAN OF DISTRIBUTION 

Shares of the Fund are distributed by 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 
pursuant to which the Fund pays the Distributor compensation, accrued daily 
and payable monthly, at an annual rate of 0.60% of the lesser of: (a) the 
average daily aggregate gross sales of the Fund's shares since the Fund's 
inception (not including reinvestment of dividend or capital gains 
distributions) less the average daily aggregate net asset value of the Fund's 
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 Fund's average daily net assets. Amounts paid under the Plan are paid 
to the Distributor to compensate it for the services provided and the 
expenses borne by it and others in the distribution of the Fund's shares, 
including the payment of commissions for sales of the Fund's shares and 
incentive compensation to, and expenses of, account executives of Dean Witter 
Reynolds Inc., an affiliate of the Investment Manager and Distributor, and 
other employees and selected broker-dealers who engage in or support 
distribution of the Fund's 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 be compensated under the Plan for its opportunity costs in 
advancing such amounts, which compensation would be in the form of a carrying 
charge on any unreimbursed expenses incurred by the Distributor. 

Provided that the Plan continues in effect, any cumulative expenses incurred 
but not yet recovered may be recovered through future distribution fees from 
the Fund and contingent deferred sales charges from the Fund's shareholders. 

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 $2,185,656 at September 30, 1996. 

The Distributor has informed the Fund that for the year ended September 30, 
1996, it received approx-imately $176,000 in contingent deferred sales 
charges from certain redemptions of the Fund's shares. 

                                      44
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
NOTES TO FINANCIAL STATEMENTS September 30, 1996, 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 September 30, 1996 
aggregated $25,614,487 and $9,690,374, respectively. 

Dean Witter Trust Company, an affiliate of the Investment Manager and 
Distributor, is the Fund's transfer agent. At September 30, 1996, the Fund 
had transfer agent fees and expenses payable of approximately $2,900. 

5. SHARES OF BENEFICIAL INTEREST 

Transactions in shares of beneficial interest were as follows: 

<TABLE>
<CAPTION>
                                    FOR THE YEAR                 FOR THE YEAR 
                                       ENDED                        ENDED 
                                 SEPTEMBER 30, 1996           SEPTEMBER 30, 1995 
                           ---------------------------- ---------------------------- 
                               SHARES         AMOUNT        SHARES         AMOUNT 
                           ------------- -------------- ------------- -------------- 
<S>                           <C>          <C>             <C>          <C>
Sold                          2,938,811    $ 31,065,314    4,055,681    $ 40,945,963 
Reinvestment of dividends       198,921       2,094,383      129,694       1,316,413 
                           ------------- -------------- ------------- -------------- 
                              3,137,732      33,159,697    4,185,375      42,262,376 
Repurchased                  (1,548,482)    (16,190,401)  (1,026,786)    (10,309,215) 
                           ------------- -------------- ------------- -------------- 
Net increase                  1,589,250    $ 16,969,296    3,158,589    $ 31,953,161 
                           ============= ============== ============= ============== 
</TABLE>

6. FEDERAL INCOME TAX STATUS 

Capital losses incurred after October 31 ("post-October losses") within the 
taxable year are deemed to arise on the first business day of the Fund's next 
taxable year. The Fund incurred and will elect to defer net capital losses of 
approximately $54,000 during fiscal 1996. 

                                      45
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
FINANCIAL HIGHLIGHTS 

Selected ratios and per share data for a share of beneficial interest 
outstanding throughout each period: 

<TABLE>
<CAPTION>
                                                                                     FOR THE PERIOD 
                                                FOR THE YEAR       FOR THE YEAR      JUNE 2, 1994* 
                                                   ENDED              ENDED             THROUGH 
                                             SEPTEMBER 30, 1996 SEPTEMBER 30, 1995 SEPTEMBER 30, 1994 
- ----------------------------------------------------------------------------------------------------- 
<S>                                                 <C>                <C>                <C>
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period ........       $10.39             $ 9.87             $10.00 
                                                    ------             ------             ------ 
Net investment income........................         0.50               0.50               0.09 
Net realized and unrealized gain (loss) .....         0.11               0.52              (0.13) 
                                                    ------             ------             ------ 
Total from investment operations.............         0.61               1.02              (0.04) 
Less dividends from net investment income ...        (0.50)             (0.50)             (0.09) 
                                                    ------             ------             ------ 
Net asset value, end of period...............       $10.50             $10.39             $ 9.87 
                                                    ======             ======             ======
TOTAL INVESTMENT RETURN+.....................         5.94%             10.54%             (0.46)%(1) 
RATIOS TO AVERAGE NET ASSETS: 
Expenses.....................................         0.97%(5)           0.60%(4)           0.60 %(2)(3) 
Net investment income........................         4.72%(5)           4.93%(4)           3.07 %(2)(3) 
SUPPLEMENTAL DATA: 
Net asset value, end of period, in 
 thousands ..................................      $81,616            $64,276            $29,860 
Portfolio turnover rate......................           13%                 2%               --  ++% 
</TABLE>

- ------------ 
*      Commencement of operations. 
+      Does not reflect the deduction of sales charge. Calculated based on 
       the net asset value as of the last business day of the period. 
++     Less than 0.5%. 
(1)    Not annualized. 
(2)    Annualized. 
(3)    If the Fund had borne all expenses that were assumed or waived by the 
       Investment Manager, the above annualized expense and net investment 
       income ratios would have been 2.08% and 1.59%, respectively. 
(4)    If the Fund had borne all expenses that were assumed or waived by the 
       Investment Manager, the above annualized expense and net investment 
       income ratios would have been 1.34% (which includes 0.01% gross up for 
       custody cash credits) and 4.20%, respectively. 
(5)    If the Fund had borne all expenses that were reimbursed or waived by 
       the Investment Manager, the above annualized expense and net 
       investment income ratios would have been 1.19% (which includes 0.01% 
       gross up for custody cash credits) and 4.50%, respectively. 

                       SEE NOTES TO FINANCIAL STATEMENTS

                                      46
<PAGE>

DEAN WITTER NATIONAL MUNICIPAL TRUST 
REPORT OF INDEPENDENT ACCOUNTANTS 

TO THE SHAREHOLDERS AND TRUSTEES 
OF DEAN WITTER NATIONAL MUNICIPAL TRUST 

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 Dean Witter 
National Municipal Trust (the "Fund") at September 30, 1996, 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 two years in the period then ended and for the period June 2, 
1994 (commencement of operations) through September 30, 1994, 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 
September 30, 1996 by correspondence with the custodian and brokers, provide 
a reasonable basis for the opinion expressed above. 

PRICE WATERHOUSE LLP 
1177 Avenue of the Americas 
New York, New York 10036 
November 8, 1996 

- ----------------------------------------------------------------------------- 
                     1996 FEDERAL TAX NOTICE (unaudited) 

       During the year ended September 30, 1996, the Fund paid to shareholders 
       $0.50 per share from net investment income. All of the Fund's dividends 
       from net investment income were exempt interest dividends, excludable 
       from gross income for Federal income tax purposes. 
- ----------------------------------------------------------------------------- 

<PAGE>

APPENDIX 

RATINGS OF INVESTMENTS 
- ----------------------------------------------------------------------------- 

Moody's Investors Service Inc. ("Moody's") 

                            MUNICIPAL BOND RATINGS 

<TABLE>
<CAPTION>
<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 a 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>

   Conditional Rating: Bonds for which the security depends upon the 
completion of some act or the fulfillment of some condition are rated 
conditionally. These bonds are secured by (a) earnings of projects under 
construction, (b) earnings of projects unseasoned in operation experience, 
(c) rentals which begin when facilities are completed or (d) payments to 
which some other limiting condition attaches. Parenthetical rating denotes 
probable credit stature upon completion of construction or elimination of 
basis of condition. 

                                      48
<PAGE>

   Rating Refinements: Moody's may apply numerical modifiers, 1, 2, and 3 in 
each generic rating classification from Aa though 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. 

                            MUNICIPAL NOTE RATINGS 

   Moody's ratings for state and municipal note and other short-term loans 
are designated Moody's Investment Grade (MIG). MIG 1 denotes best quality and 
means there is present strong protection from established cash flows, 
superior liquidity support or demonstrated broad-based access to the market 
for refinancing. MIG 2 denotes high quality and means that margins of 
protection are ample although not as large as in MIG 1. MIG 3 denotes 
favorable quality and means that all security elements are accounted for but 
that the undeniable strength of the previous grades, MIG 1 and MIG 2, is 
lacking. MIG 4 denotes adequate quality and means that the protection 
commonly regarded as required of an investment security is present and that 
while the notes are not distinctly or predominantly speculative, there is 
specific risk. 

                       VARIABLE RATE DEMAND OBLIGATIONS 

   A short-term rating, in addition to the Bond or MIG ratings, designated 
VMIG may also be assigned to an issue having a demand feature. The assignment 
of the VMIG symbol reflects such characteristics as payment upon periodic 
demand rather than fixed maturity dates and payment relying on external 
liquidity. The VMIG rating criteria are identical to the MIG criteria 
discussed above. 

                           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. These ratings apply to Municipal Commercial Paper as well as 
taxable Commercial Paper. Moody's employs the following three 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 categories. 

STANDARD & POOR'S CORPORATION ("STANDARD & POOR'S") 

                            MUNICIPAL BOND RATINGS 

   A Standard & Poor's municipal 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. 

                                      49
<PAGE>

<TABLE>
<CAPTION>
<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 would 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. 

C       The rating "C" is typically applied to debt subordinated to senior debt which is assigned an actual or 
        implied "CCC-'' debt rating. 

Cl      The rating "Cl" is reserved for income bonds on which no interest is being paid. 

D       Debt rated "D" is in payment default. The 'D' rating category is used when interest payments or principal 
        payments are not made on the date due even if the applicable grace period has not expired, unless S&P believes 
        that such payments will be made during such grace period. The 'D' rating also will be used upon the filing 
        of a bankruptcy petition if debt service payments are jeopardized. 

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 ratings 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. 

        The foregoing ratings are sometimes followed by a "p" which indicates that the rating is provisional. A 
        provisional rating assumes the successful completion of the project being financed by the bonds being rated 
        and indicates that payment of debt service requirements is largely or entirely dependent upon the successful 
        and timely completion of the project. This rating, however, while addressing credit quality subsequent 
        to completion of the project, makes no comment on the likelihood or risk of default upon failure of such 
        completion. 
</TABLE>

                                      50
<PAGE>

                            MUNICIPAL NOTE RATINGS

   Commencing on July 27, 1984, Standard & Poor's instituted a new rating 
category with respect to certain municipal note issues with a maturity of 
less than three years. The new note ratings denote the following: 

       SP-1 denotes a very strong or strong capacity to pay principal and
   interest. Issues determined to possess overwhelming safety characteristics
   are given a plus (+) designation (SP-1+).

       SP-2 denotes a satisfactory capacity to pay principal and interest.

       SP-3 denotes a speculative capacity to pay principal and interest.

                           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 S&P 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.

       A-1 indicates that the degree of safety regarding timely payments 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.

                                      51
<PAGE>
   

                     DEAN WITTER NATIONAL MUNICIPAL TRUST
                   PROXY FOR SPECIAL MEETING OF SHAREHOLDERS
                          TO BE HELD OCTOBER 24, 1997

The undersigned shareholder of Dean Witter National Municipal Trust does 
hereby appoint BARRY FINK, ROBERT M. SCANLAN, and JOSEPH McALINDEN and each 
of them, as attorneys-in-fact and proxies of the undersigned, each with the 
full power of substitution, to attend the Special Meeting of Shareholders of 
Dean Witter National Municipal Trust to be held on October 24, 1997, at the 
Conference Room, 44th Floor, Two World Trade Center, New York, New York at 
9:00 A.M., New York time, and at all adjournments thereof and to vote the 
shares held in the name of the undersigned on the record date for said 
meeting for the Proposal specified on the reverse side hereof. Said 
attorneys-in-fact shall vote in accordance with their best judgment as to any 
other matter. 

                          (Continued on reverse side)
    


THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN 
BY THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY WILL BE 
VOTED "FOR" THE PROPOSAL SET FORTH ON THE REVERSE HEREOF AND AS RECOMMENDED 
BY THE BOARD OF TRUSTEES. 

      IMPORTANT--THIS PROXY MUST BE SIGNED AND DATED ON THE REVERSE SIDE.

<PAGE>

[X] PLEASE MARK BOXES 
    IN BLACK OR BLUE INK 

   
The Proposal: 

                                                  FOR    AGAINST    ABSTAIN
     Approval of the Agreement and Plan of        [ ]      [ ]        [ ]
Reorganization, dated as of June 30, 1997, 
pursuant to which substantially all of the assets of Dean Witter National
Municipal Trust would be combined with those of Dean Witter Tax-Exempt
Securities Trust and shareholders of Dean Witter National Municipal Trust
would become shareholders of Dean Witter Tax-Exempt Securities Trust receiving
Class B shares of Dean Witter Tax-Exempt Securities Trust with a value equal
to the value of their holdings in Dean Witter National Municipal Trust.

Please sign personally. If the shares are registered in more than one name, 
each joint owner or each fiduciary should sign personally. Only authorized 
officers should sign for corporations. 

                                       Date 
                                            -----------------------------------
                                       Please make sure to sign and date this
                                       Proxy using black or blue ink. 

                                       ----------------------------------------

                                       ----------------------------------------
                                           Shareholder sign in the box above 

                                       ----------------------------------------

                                       ----------------------------------------
                                       Co-Owner (if any) sign in the box above 
- ------------------------------------------------------------------------------
                         PLEASE DETACH AT PERFORATION

    
                     DEAN WITTER NATIONAL MUNICIPAL TRUST

- ------------------------------------------------------------------------------
                                  IMPORTANT 

                   PLEASE SEND IN YOUR PROXY.........TODAY! 

YOU ARE URGED TO DATE AND SIGN THE ATTACHED PROXY AND RETURN IT PROMPTLY IN
THE ENCLOSED ENVELOPE. THIS WILL HELP SAVE THE EXPENSE OF FOLLOW-UP LETTERS TO
SHAREHOLDERS WHO HAVE NOT RESPONDED.
- ------------------------------------------------------------------------------



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