DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
497, 1997-03-03
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<PAGE>
               PROSPECTUS
               FEBRUARY 24, 1997
 
               Dean Witter New York Municipal Money Market Trust (the "Fund") is
a no-load, open-end, non-diversified management investment company whose
investment objective is to provide as high a level of daily income exempt from
federal and New York income tax as is consistent with stability of principal and
liquidity. The Fund has a Rule 12b-1 Plan of Distribution (see below). The Fund
seeks to achieve its objective by investing primarily in high quality New York
tax-exempt securities with short-term maturities, including Municipal Bonds,
Municipal Notes and Municipal Commercial Paper. (See "Investment Objective and
Policies.") The Fund may invest a significant percentage of its assets in the
securities of a single issuer and therefore an investment in the Fund may be
riskier than an investment in other types of money funds.
 
               AN INVESTMENT IN THE FUND IS NEITHER INSURED NOR GUARANTEED BY
THE U.S. GOVERNMENT. THERE IS NO ASSURANCE THAT THE FUND WILL BE ABLE TO
MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE.
 
               In accordance with a Plan of Distribution with Dean Witter
Distributors Inc. pursuant to Rule 12b-1 under the Investment Company Act of
1940, the Fund is authorized to reimburse specific expenses incurred in
promoting the distribution of the Fund's shares. Reimbursement may in no event
exceed an amount equal to payments at the annual rate of 0.15 of 1% of the
average daily net assets of the Fund.
 
               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  February 24, 1997, which  has been filed  with
the Securities and Exchange Commission, and which is available at no charge upon
request  of the Fund at its address or at one of its telephone numbers listed on
this page. The  Statement of  Additional Information is  incorporated herein  by
reference.
 
Dean Witter
New York Municipal Money Market Trust
Two World Trade Center
New York, New York 10048
 
                               TABLE OF CONTENTS
 
Prospectus Summary/2
Summary of Fund Expenses/3
Financial Highlights/4
The Fund and its Management/4
Investment Objective and Policies/5
  Special Considerations Relating to New York
  Tax-Exempt Securities/9
Investment Restrictions/10
Purchase of Fund Shares/10
Shareholder Services/12
Redemption and Repurchase of Fund Shares/15
Dividends, Distributions and Taxes/17
Additional Information/19
Financial Statements--December 31, 1996/21
Report of Independent Accountants/29
 
  For information about the Fund, including information on opening an account,
registration of shares, and other information relating to a specific account,
call:
 
  - 800-869-NEWS (toll-free) or
 
  - 212-392-2550
 
<TABLE>
<S>                                       <C>
Minimum initial investment .............  $5,000
Minimum additional investment...........  $  100
</TABLE>
 
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, 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
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>                 <C>
The                 The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an open-end,
Fund                non-diversified management investment company investing principally in short-term securities which are exempt
                    from federal and New York income tax.
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Offered      Shares of beneficial interest with $0.01 par value. (see p. 19).
- ------------------------------------------------------------------------------------------------------------------------------------
Purchase of Shares  Investments may be made:
                    - By wire
                    - By mail
                    - Through Dean Witter Reynolds Inc. account executives or other Selected Broker-Dealers
                    Purchases are at net asset value, without a sales charge. Minimum initial investment: $5,000. Subsequent
                    investments: $100 or more (by wire or by mail); $1,000 or more (through account executives) or $100 to $5,000
                    (by EasyInvest-SM-). Orders for purchase of shares are effective on day of receipt of payment in Federal funds
                    if payment is received by the Fund's transfer agent before 12:00 noon New York time (see p. 10).
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          To provide as high a level of daily income exempt from federal and New York income tax as is consistent with
Objective           stability of principal and liquidity (see p. 5).
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          A portfolio of New York tax-exempt fixed-income securities with short-term maturities (see p. 5).
Policy
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          Dean Witter InterCapital Inc. ("InterCapital"), the Investment Manager of the Fund and its wholly-owned
Manager             subsidiary, Dean Witter Services Company Inc., serve in various investment management, advisory, management and
                    administrative capacities to 101 investment companies and other portfolios with assets of approximately $92.5
                    billion at January 31, 1997 (see page 4). 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 p. 4-5).
- ------------------------------------------------------------------------------------------------------------------------------------
Distributor and     Dean Witter Distributors Inc. (the "Distributor") is the Fund's Distributor. The Fund is authorized to reimburse
Plan of             specific expenses incurred in promoting the distribution of the Fund's shares pursuant to a Plan of Distribution
Distribution        pursuant to Rule 12b-1 under the Investment Company Act of 1940. Reimbursement may in no event exceed an amount
                    equal to payments at the annual rate of 0.15 of 1% of average daily net assets of the Fund (see p. 10-12).
- ------------------------------------------------------------------------------------------------------------------------------------
Management          The monthly fee is at an annual rate of 1/2 of 1% of average daily net assets, scaled down on assets over $500
Fee                 million (see p. 5).
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends           Declared and automatically reinvested daily in additional shares; cash payments of dividends available
                    monthly (see p. 17).
- ------------------------------------------------------------------------------------------------------------------------------------
Reports             Individual periodic account statements; annual and semi-annual Fund financial statements.
- ------------------------------------------------------------------------------------------------------------------------------------
Redemption of       Shares are redeemable by the shareholder at net asset value without any charge (see p. 15):
Shares              - By check
                    - By telephone or wire instructions, with proceeds wired or mailed to a predesignated bank account
                    - By mail
                    - Via an automatic redemption procedure (see p. 17)
                    A shareholder's account is subject to possible involuntary redemption if its value falls below $1,000 (see p.
                    17).
- ------------------------------------------------------------------------------------------------------------------------------------
Risks               The Fund invests principally in short-term fixed income securities issued or guaranteed by the State of New York
                    and its local governments which are subject to minimal risk of loss of income and principal. However, the
                    investor is directed to the discussions concerning "variable rate obligations" and "when-issued and delayed
                    delivery securities" on page 8 of the Prospectus and on page 14 of the Statement of Additional Information and
                    the discussions concerning "repurchase agreements" and "puts" on pages 14-16 of the Statement of Additional
                    Information, concerning any risks associated with such portfolio securities and management techniques. Since the
                    Fund concentrates its investments in New York tax-exempt securities, the Fund is affected by any political,
                    economic or regulatory developments affecting the ability of New York issuers to pay interest or repay principal
                    (see pages 19-24 of the Statement of Additional Information).
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
  ELSEWHERE IN THE PROSPECTUS AND IN THE STATEMENT OF ADDITIONAL INFORMATION.
 
                                       2
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
 
    The  following table illustrates all expenses and fees that a shareholder of
the Fund will incur. Expenses and fees set  forth in the table are for the  year
ended December 31, 1996.
 
<TABLE>
<CAPTION>
SHAREHOLDER TRANSACTION EXPENSES
- ---------------------------------------------------------------------------------------
<S>                                                                                      <C>
Maximum Sales Charge Imposed on Purchases..............................................  None
Maximum Sales Charge Imposed on Reinvested Dividends...................................  None
Deferred Sales Charge..................................................................  None
Redemption Fees........................................................................  None
Exchange Fee...........................................................................  None
</TABLE>
 
<TABLE>
<S>                                                                                     <C>
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- --------------------------------------------------------------------------------------
Management Fees.......................................................................      0.50%
12b-1 Fee*............................................................................      0.09%
Other Expenses........................................................................      0.36%
Total Fund Operating Expenses.........................................................      0.95%
<FN>
- ------------------------
* THE 12B-1 FEE IS CHARACTERIZED AS A SERVICE FEE WITHIN THE MEANING OF NATIONAL
  ASSOCIATION OF SECURITIES DEALERS, INC., ("NASD") GUIDELINES (SEE "PURCHASE OF
  FUND SHARES").
</TABLE>
 
<TABLE>
<CAPTION>
EXAMPLE                                                                   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) 5%  annual return  and (2)  redemption at  the end  of each  time
 period...............................................................   $      10    $      30    $      53    $     117
</TABLE>
 
    THE  ABOVE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST OR
FUTURE EXPENSES OR PERFORMANCE.  ACTUAL EXPENSES OF THE  FUND 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"  and  "Purchase   of  Fund  Shares--Plan   of
Distribution" in this Prospectus.
 
                                       3
<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, notes thereto  and the unqualified report of  the
independent  accountants which  are contained  in this  Prospectus commencing on
page 21.
 
<TABLE>
<CAPTION>
                                                                                     FOR THE PERIOD
                                       FOR THE YEAR ENDED DECEMBER 31,               MARCH 20, 1990*
                           -------------------------------------------------------       THROUGH
                            1996     1995        1994     1993     1992     1991    DECEMBER 31, 1990
                           -------  -------     -------  -------  -------  -------  -----------------
<S>                        <C>      <C>         <C>      <C>      <C>      <C>      <C>
PER SHARE OPERATING
  PERFORMANCE:
Net asset value,
  beginning of period....  $  1.00  $  1.00     $  1.00  $  1.00  $  1.00  $  1.00      $   1.00
                           -------  -------     -------  -------  -------  -------  -----------------
Net investment income....    0.025    0.028       0.018    0.014    0.019    0.035         0.045
Less dividends from net
  investment income......   (0.025)  (0.028)     (0.018)  (0.014)  (0.019)  (0.035)       (0.045)
                           -------  -------     -------  -------  -------  -------  -----------------
Net asset value, end of
  period.................  $  1.00  $  1.00     $  1.00  $  1.00  $  1.00  $  1.00      $   1.00
                           -------  -------     -------  -------  -------  -------  -----------------
                           -------  -------     -------  -------  -------  -------  -----------------
TOTAL INVESTMENT
  RETURN+................     2.53%    2.84%       1.78%    1.36%    1.86%    3.57%         4.69%(1)
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of
  period, in thousands...  $40,758  $39,108     $39,629  $41,112  $45,126  $66,196      $101,294
Ratios to average net
  assets:
  Expenses...............     0.95 (4)    1.01%(4)    1.03%    1.03%    0.97%    0.87%         0.12%(2)(3)
  Net investment
   income................     2.48%    2.79%       1.75%    1.34%    1.86%    3.53%         5.66%(2)(3)
<FN>
- ------------------------------
 *    COMMENCEMENT OF OPERATIONS.
 +    CALCULATED BASED ON THE NET ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE
      PERIOD.
(1)   NOT ANNUALIZED.
(2)   ANNUALIZED.
(3)   IF THE FUND  HAD BORNE ALL  EXPENSES THAT  WERE ASSUMED OR  WAIVED BY  THE
      INVESTMENT MANAGER, THE ABOVE ANNUALIZED EXPENSE AND NET INVESTMENT INCOME
      RATIOS WOULD HAVE BEEN 0.80% AND 4.98%, RESPECTIVELY.
(4)   THE ABOVE RATIOS DO NOT REFLECT THE EFFECT OF THE EXPENSE OFFSETS OF
      0.01%.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
    Dean  Witter  New  York Municipal  Money  Market  Trust (the  "Fund")  is an
open-end, non-diversified management investment company. The Fund was  organized
as  a trust of  the type commonly  known as a  "Massachusetts business trust" on
December 28,  1989.  Prior  to February  19,  1993,  the Fund's  name  was  Dean
Witter/Sears New York Municipal Money Market Trust.
 
    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 Dean Witter, Discover  & Co. ("DWDC"), a
balanced financial services organization providing  a broad range of  nationally
marketed credit and investment products.
 
    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 101  investment companies,  thirty of
which are listed  on the  New York Stock  Exchange, with  combined total  assets
including  this Fund of approximately $89.3 billion  as of January 31, 1997. The
Investment Manager also manages portfolios of pension plans, other  institutions
and individuals
 
                                       4
<PAGE>
which aggregated approximately $3.2 billion at such date.
 
    On  February 5, 1997, DWDC and Morgan Stanley Group Inc. announced that they
had entered into an Agreement and Plan  of Merger, with the combined company  to
be  named Morgan  Stanley, Dean  Witter, Discover &  Co. The  business of Morgan
Stanley Group Inc.  and its affiliated  companies is providing  a wide range  of
financial  services  for sovereign  governments, corporations,  institutions and
individuals throughout the world. DWDC is the direct parent of InterCapital  and
Dean   Witter  Distributors  Inc.,  the  Fund's  distributor.  It  is  currently
anticipated  that   the  transaction   will  close   in  mid-1997.   Thereafter,
InterCapital  and Dean Witter  Distributors Inc. will  be direct subsidiaries of
Morgan Stanley, Dean Witter, Discover & Co.
 
    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
Board  of  Trustees  reviews  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 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  0.25% on assets  over $3 billion.  For the fiscal year
ended December 31, 1996, the Fund  accrued total compensation to the  Investment
Manager amounting to 0.50% of the Fund's average daily net assets and the Fund's
total expenses amounted to 0.95% of the Fund's average daily net assets.
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The  investment objective of the Fund is to provide as high a level of daily
income exempt  from  federal and  New  York income  tax  as is  consistent  with
stability  of principal and  liquidity. It is  a fundamental policy  of the Fund
that at least 80% of its total  assets will be invested in tax-exempt  Municipal
Obligations  and at least 65% of the Fund's total assets will be invested in New
York Municipal Obligations. The  interest on New  York Municipal Obligations  is
exempt  from Federal, New York  State and New York  City income taxes. Municipal
Obligations other than New  York Municipal Obligations  are exempt from  Federal
tax  but  not from  New York  State and  New York  City taxes.  However, certain
Municipal Obligations in  which the Fund  may invest without  limit may  subject
certain  investors to the alternative minimum  tax and, therefore, a substantial
portion of the income  produced by the  Fund may be  taxable for such  investors
under  the alternative minimum tax. The Fund, therefore, may not ordinarily be a
suitable investment for  investors who  are subject to  the alternative  minimum
tax.  The  suitability  of the  Fund  for  these investors  will  depend  upon a
comparison of  the  after-tax yield  likely  to be  provided  from the  Fund  to
comparable tax-exempt investments not subject to such tax and also to comparable
fully  taxable investments  in light of  each such investor's  tax position (see
"Dividends, Distributions and  Taxes"). This  policy and  the Fund's  investment
objective  may  not  be changed  without  a vote  of  a majority  of  the Fund's
outstanding voting securities, as defined in the Investment Company Act of 1940,
as amended  (the  "Act"). There  is  no assurance  that  the objective  will  be
achieved.
 
                                       5
<PAGE>
    The  Fund seeks  to achieve  its investment  objective by  investing in high
quality tax-exempt securities with  short-term maturities (remaining  maturities
of  thirteen months or  less) as follows.  Such securities will  include (i) New
York Municipal Bonds, New York Municipal Notes and New York Municipal Commercial
Paper, which are rated at the time of purchase in one of the two highest  rating
categories   for  debt  obligations  by   at  least  two  nationally  recognized
statistical  rating  organizations   ("NRSROS"),  primarily  Moody's   Investors
Service,  Inc. ("Moody's")  or Standard and  Poor's Corporation  ("S&P"), or one
NRSRO if the obligation is rated by  only one NRSRO. Unrated obligations may  be
purchased  if they  are determined  to be  of comparable  quality by  the Fund's
Trustees.
 
    Up to 35% of the  Fund's total assets may  be invested in securities  exempt
from  federal income tax  but not from New  York State and  New York City income
taxes ("non-New York tax-exempt securities") and  up to 20% of the Fund's  total
assets  may  be  invested  in  taxable securities.  In  addition,  the  Fund may
temporarily invest more than 20% of  its total assets in taxable securities  and
more  than 35%  of its  total assets  in non-New  York tax-exempt  securities to
maintain a "defensive" posture when, in  the opinion of the Investment  Manager,
prevailing  market  or financial  conditions so  warrant.  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 or 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  Bonds and  Municipal Notes are  debt obligations of  a state, its
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  which  may  be issued  at  a  discount  and are
sometimes referred  to  as Short-Term  Discount  Notes. Any  Municipal  Bond  or
Municipal Note which depends directly or indirectly on the credit of the Federal
Government,  its agencies  or instrumentalities  shall be  considered to  have a
Moody's rating of Aaa or S&P rating of AAA. An obligation shall be considered  a
New  York  Municipal  Bond,  New  York  Municipal  Note  or  New  York Municipal
Commercial Paper only if, in the  opinion of bond counsel, the interest  payable
therefrom  is exempt from both  federal income tax and  New York personal income
tax.
 
    The foregoing  percentage  and  rating  limitations 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
total  assets  will not  require  elimination of  any  security from  the Fund's
portfolio. However, in accordance with procedures adopted by the Fund's Trustees
pursuant to federal securities regulations governing money market funds, if  the
Investment  Manager becomes aware  that a portfolio security  has received a new
rating from an NRSRO that is below  the second highest rating, then, unless  the
security  is disposed of within five days, the Investment Manager will perform a
creditworthiness analysis  of  any such  downgraded  securities, which  will  be
reported  to the  Trustees who will,  in turn, determine  whether the securities
continue to present minimal credit risks to the Fund.
 
    The ratings assigned by NRSROs 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.
 
                                       6
<PAGE>
    The two principal classifications of  Municipal Bonds, Notes and  Commercial
Paper  are "general obligation" and "revenue"  bonds, notes 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 governmental  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  multifamily  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  bonds  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.
 
    Certain lease obligations have not yet developed 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 Fund is classified as a non-diversified investment company under the Act
and as such is not limited  by the Act in the  proportion of its assets that  it
may  invest in the obligations of a  single issuer. However, the Fund intends to
conduct its operations
 
                                       7
<PAGE>
so as to qualify as a "regulated  investment company" under Subchapter M of  the
Internal  Revenue Code (the "Code"). See "Dividends, Distribution and Taxes." In
order to qualify, among other requirements, the Fund will limit its  investments
so  that at the close of each quarter of the taxable year, (i) not more than 25%
of the  market  value  of the  Fund's  total  assets will  be  invested  in  the
securities  of a single issuer, and (ii) with respect to 50% of the market value
of its total assets  not more than 5%  will be invested in  the securities of  a
single  issuer and the Fund will not own more than 10% of the outstanding voting
securities of a single issuer. To  the extent that a relatively high  percentage
of  the Fund's assets may be invested in  the obligations of a limited number of
issuers, the Fund's portfolio securities will be more susceptible to any  single
economic,  political or regulatory occurrence than the portfolio securities of a
diversified investment company. Additionally, the Fund's yield will fluctuate to
a greater extent than that  of a diversified investment  company as a result  of
changes  in the financial condition or in the market's assessment of the various
issuers. The  limitations  described  in  this  paragraph  are  not  fundamental
policies  and  may  be  revised  to the  extent  applicable  Federal  income tax
requirements are revised.
 
    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) whether or not the users of facilities financed by such bonds are in  the
same  industry. In cases where such users are in the same industry, there may be
additional risk  to the  Fund  in the  event of  an  economic downturn  in  such
industry, which may result generally in a lowered need for such facilities and a
lowered ability of such users to pay for the use of such facilities.
 
    The  high  quality, short-term  fixed-income  securities in  which  the Fund
principally invests  are  guaranteed by  state  and local  governments  and  are
subject to minimal risk of loss of income and principal.
 
PORTFOLIO MANAGEMENT
 
    Although  the Fund will generally acquire securities for investment with the
intent of holding them to maturity and will not seek profits through  short-term
trading,  the Fund  may dispose of  any security  prior to its  maturity to meet
redemption requests.  Securities may  also be  sold when  the Fund's  Investment
Manager  believes such  disposition to  be advisable on  the basis  of a revised
evaluation of the issuer or based upon relevant market considerations. There may
be occasions when, as a result of maturities of portfolio securities or sale  of
Fund  shares, or in order to meet  anticipated redemption requests, the Fund may
hold cash which is not earning income.
 
    The Fund anticipates  that the  average weighted maturity  of the  portfolio
will  be  90  days or  less.  The  relatively short-term  nature  of  the Fund's
portfolio is expected to  result in a lower  yield than portfolios comprised  of
longer-term tax-exempt securities.
 
    VARIABLE  RATE AND FLOATING RATE OBLIGATIONS.  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" or "floating 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.
 
    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.
 
    BROKERAGE  ALLOCATION.   Brokerage commissions  are not  normally charged on
purchases and
 
                                       8
<PAGE>
sales of short-term  municipal obligations,  but such  transactions may  involve
transaction  costs in the form of spreads between bid and asked prices. Pursuant
to an  order of  the Securities  and Exchange  Commission, the  Fund may  effect
principal  transactions  in certain  money market  instruments with  Dean Witter
Reynolds Inc. ("DWR"), a broker-dealer  affiliate of InterCapital. In  addition,
the Fund may incur brokerage commissions on transactions conducted through DWR.
 
SPECIAL CONSIDERATIONS RELATING TO NEW YORK TAX-EXEMPT SECURITIES
 
    Since   the  Fund  concentrates  its  investments  in  New  York  tax-exempt
securities, the  Fund  is affected  by  any political,  economic  or  regulatory
developments  affecting  the  ability  of New  York  tax-exempt  issuers  to pay
interest or repay principal. Investors should  be aware that certain issuers  of
New  York tax-exempt securities have  experienced serious financial difficulties
in recent years. A reoccurrence of these difficulties may impair the ability  of
certain New York issuers to maintain debt service on their obligations.
 
    The  fiscal stability  of New  York State  (the "State")  is related  to the
fiscal stability of  the State's  municipalities, its  Agencies and  Authorities
(which generally finance, construct and operate revenue-producing public benefit
facilities).  This is  due in  part to the  fact that  Agencies, Authorities and
local governments in  financial trouble often  seek State financial  assistance.
The  experience  has been  that if  New York  City  (the "City")  or any  of the
Agencies or Authorities suffers serious  financial difficulty, both the  ability
of the State, the City, the State's political subdivisions, the Agencies and the
Authorities  to obtain  financing in  the public  credit markets  and the market
price of outstanding New York tax-exempt securities are adversely affected.
 
    Over the long term, the State and City face potential economic problems. The
City accounts for a large portion of the State's population and personal income,
and the City's  financial health affects  the State in  numerous ways. The  City
continues  to require significant financial assistance  from the State. The City
depends on State aid both to enable the  City to balance its budget and to  meet
its  cash requirements. The State  could also be affected  by the ability of the
City to market its securities successfully in the public credit markets.
 
    The economic and financial  condition of the State  also may be affected  by
various  financial, social, economic and political  factors. Such factors can be
very complex, may vary from  fiscal year to fiscal  year and are frequently  the
result   of  actions  taken  not  only  by   the  State  and  its  agencies  and
instrumentalities, but also by  entities, such as  the Federal government,  that
are not under the control of the State.
 
    On  January 13, 1992, Standard  & Poor's reduced its  ratings on the State's
general obligation bonds from A to A-  and, in addition, reduced its ratings  on
the  State's  moral  obligation,  lease  purchase,  guaranteed  and  contractual
obligation debt. Standard &  Poor's also continued  its negative rating  outlook
assessment  on  State general  obligation debt.  On April  26, 1993,  Standard &
Poor's revised the rating  outlook assessment to stable.  On February 14,  1994,
Standard  & Poor's raised its rating outlook to positive and, on August 5, 1996,
confirmed its A-  rating. On  January 6, 1992,  Moody's reduced  its ratings  on
outstanding  limited-liability State lease  purchase and contractual obligations
from A  to Baa1.  On July  26, 1996,  Moody's reconfirmed  its A  rating on  the
State's general obligation long-term indebtedness.
 
    For  a  more  detailed discussion  of  New  York economic  factors,  see the
Statement of Additional Information.
 
    The summary information furnished above  and in the Statement of  Additional
Information  is based on official  statements prepared by the  State of New York
and the  City  of  New York  and  their  authorities in  connection  with  their
borrowings  and  contains  such  information  as  the  Fund  deems  relevant  in
considering an investment  in the Fund.  It does  not purport to  be a  complete
description of the considerations contained therein.
 
                                       9
<PAGE>
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    The  investment restrictions listed  below are among  the restrictions which
have been  adopted  by  the Fund  as  fundamental  policies. Under  the  Act,  a
fundamental  policy may  not be changed  without the  vote of a  majority of the
outstanding voting securities of the Fund, as defined in the Act.
 
    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
total assets does not require elimination of any security from the portfolio.
 
    The Fund may not:
 
   1. 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.
 
   2. Invest 25% or more of the value of its total assets in taxable  securities
of  issuers in  any one industry  (industrial development  and pollution control
bonds are grouped into industries based  upon the business in which the  issuers
of such obligations are engaged). This restriction does not apply to obligations
issued   or  guaranteed  by  the  United  States  Government,  its  agencies  or
instrumentalities or to  Municipal Obligations,  including those  issued by  the
State   of  New  York  or  its  political  subdivisions,  or  to  domestic  bank
obligations.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    The Fund offers its own shares for sale to the public on a continuous basis,
without a sales charge.  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
offering price of the shares  will be at their  net asset value next  determined
(see "Determination of Net Asset Value" below) after receipt of a purchase order
and  acceptance by  Dean Witter Trust  Company (the "Transfer  Agent") in proper
form and accompanied by payment in  Federal Funds (i.e., monies of member  banks
within  the Federal Reserve  System held on  deposit at a  Federal Reserve Bank)
available to the Fund for investment. Shares commence earning income on the  day
following  the date  of purchase. Share  certificates will not  be issued unless
requested in writing by the shareholder.
 
    To initiate purchase  by mail  or wire, a  completed Investment  Application
(contained  in  the  Prospectus) must  be  sent  directly to  Dean  Witter Trust
Company, at  P.O. Box  1040, Jersey  City,  N.J. 07303.  Checks should  be  made
payable  to the Dean  Witter New York  Municipal Money Market  Trust and sent to
Dean Witter  Trust Company  at the  above  address. Purchases  by wire  must  be
preceded  by  a call  to the  Transfer Agent  advising it  of the  purchase (see
Investment Application or the front cover  of this Prospectus for the  telephone
number)  and must be wired to The Bank of New York, for credit to the Account of
Dean Witter Trust Company, Harborside
 
                                       10
<PAGE>
Financial Center, Plaza Two,  Jersey City, New  Jersey, Account No.  8900188413.
Wire   purchase  instructions  must  include  the  name  of  the  Fund  and  the
shareholder's account number.  Purchases made  by check  are normally  effective
within  two  business days  for checks  drawn on  Federal Reserve  System member
banks, and longer for most other checks. Wire purchases received by the Transfer
Agent prior to 12 noon New York  time are normally effective that day, and  wire
purchases  received after 12 noon New York  time are normally effective the next
business day. Initial investments must be at least $5,000, although the Fund, at
its discretion, may accept initial investments of smaller amounts, not less than
$1,000. Subsequent investments must be $100 or more and may be made through  the
Transfer  Agent.  The Fund  will waive  the minimum  initial investment  for the
automatic reinvestment of distributions from certain unit investment trusts. The
Fund and the Distributor reserve the right to reject any purchase order.
 
    Sales personnel are compensated for selling  shares of the Fund at the  time
of  their sale  by the Distributor  and/or 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.
 
    Orders  for the purchase of  Fund shares placed by  customers through DWR or
other Selected  Broker-Dealers with  payment  in clearing  house funds  will  be
transmitted  to  the Fund  with payment  in  Federal Funds  on the  business day
following the  day the  order is  placed by  the customer  with DWR  or  another
Selected  Broker-Dealer. Investors  desiring same day  effectiveness should wire
Federal Funds directly  to the Transfer  Agent. An order  procedure pursuant  to
which customers can, upon request; (a) have the proceeds from the sale of listed
securities  invested in  shares of  the Fund  on the  day following  the day the
customer  receives  such  proceeds  in  his   or  her  DWR  or  other   Selected
Broker-Dealer  brokerage account; and (b) pay for the purchase of certain listed
securities by automatic  liquidation of Fund  shares owned by  the customer.  In
addition,  there is  an automatic purchase  procedure whereby  consenting DWR or
another Selected Broker-Dealer customers who  are shareholders of the Fund  will
have  free cash credit  balances in their DWR  or another Selected Broker-Dealer
brokerage accounts as of the close of business (4:00 P.M., New York time) on the
last business  day of  each week  (where  such balances  do not  exceed  $5,000)
automatically  invested in shares  of the Fund the  next following business day.
Investors with free cash credit balances (i.e., immediately available funds)  in
brokerage  accounts at DWR or other Selected Broker-Dealers will not have any of
such funds invested in the Fund until the business day after the customer places
an order with  DWR or other  Selected Broker-Dealers to  purchase shares of  the
Fund  and will not receive the daily dividend which would have been received had
such funds been invested in the Fund on the day the order was placed with DWR or
other Selected Broker-Dealers. Accordingly, DWR or other Selected Broker-Dealers
may have the use of such free credit balances during such period.
 
PLAN OF DISTRIBUTION
 
    The Fund  has entered  into a  Plan of  Distribution with  the  Distributor,
pursuant to Rule 12b-1 under the Act, whereby the expenses of certain activities
in  connection with  the distribution of  the Fund's shares  are reimbursed. The
principal activities and services which may be provided by the Distributor, DWR,
its affiliates or any other Selected Broker-Dealers under the Plan include:  (1)
compensation  to,  and expenses  of,  DWR's and  other  Selected Broker-Dealers'
account  executives  and  other  employees,  including  overhead  and  telephone
expenses;  (2)  sales incentives  and bonuses  to  sales representatives  and to
marketing personnel in connection with promoting sales of the Fund's shares; (3)
expenses incurred in connection with promoting  sales of the Fund's shares;  (4)
preparing  and distributing sales literature;  and (5) providing advertising and
promotional activities,  including  direct  mail  solicitation  and  television,
radio, newspaper,
maga-
 
                                       11
<PAGE>
zine  and other media advertisements. Reimbursements  for these services will be
made in monthly payments  by the Fund  which will in no  event exceed an  amount
equal  to a payment at the annual rate of 0.15 of 1% of the Fund's average daily
net assets. For the  fiscal year ended  December 31, 1996,  the fee accrued  was
equal  to payment  at an annual  rate of 0.09%  of the Fund's  average daily net
assets. Expenses incurred pursuant to  the Plan in any  fiscal year will not  be
reimbursed by the Fund through payments accrued in any subsequent fiscal year.
 
DETERMINATION OF NET ASSET VALUE
 
    The  net asset value per share of the Fund is determined as of 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 value  of all  assets of the  Fund, subtracting  its liabilities and
dividing by the number of shares outstanding. 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.
 
    The  Fund  utilizes  the  amortized cost  method  in  valuing  its portfolio
securities, which method involves valuing a  security at its cost adjusted by  a
constant  amortization to maturity of any discount or premium, regardless of the
impact of fluctuating interest rates on the market value of the instrument.  The
purpose  of this  method of  calculation is to  facilitate the  maintenance of a
constant net asset value per share of $1.00. However, there can be no  assurance
that the $1.00 net asset value will be maintained.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    SYSTEMATIC  WITHDRAWAL PLAN.  A systematic  withdrawal plan is available for
shareholders who own or purchase shares of the Fund having a minimum value of at
least  $5,000.  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. The shares will
be redeemed at their net asset value determined, at the shareholder's option, on
the tenth or twenty-fifth day  (or next 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. A
shareholder wishing  to  make this  election  should  do so  on  the  Investment
Application. The withdrawal plan may be terminated at any time by the Fund.
 
    EASYINVEST-SM-.    Shareholders may  subscribe  to EasyInvest,  an automatic
purchase plan  which  provides  for  any  amount  from  $100  to  $5,000  to  be
transferred automatically from a checking or savings account, 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.
 
    TARGETED DIVIDENDS.  In states where it is legally permissible, shareholders
may elect to have all shares of the Fund earned as a result of dividends paid in
any  given month redeemed as of  the end of the month  and invested in shares of
any other designated open-end investment  company for which InterCapital  serves
as  investment manager (collectively,  with the Fund,  the "Dean Witter Funds"),
other than Dean Witter New York Municipal  Money Market Trust, at the net  asset
value  per share  of the  selected Dean  Witter Fund  determined as  of the last
business day of the  month, without the imposition  of any applicable  front-end
sales  charge or  without the imposition  of any  applicable contingent deferred
sales charge upon ultimate  redemption. All such shares  invested will begin  to
earn  dividends, if any, in the selected  Dean Witter Fund on the first business
day of the succeeding month.
 
                                       12
<PAGE>
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.
 
    EXCHANGE  PRIVILEGE.   An "Exchange  Privilege," that  is, the  privilege of
exchanging shares of certain  Dean Witter Funds for  shares of the Fund,  exists
whereby  shares  of  various Dean  Witter  Funds which  are  open-end investment
companies sold with either a front-end (at time of purchase) sales charge ("FESC
funds") or a  contingent deferred (at  time of redemption)  sales charge  ("CDSC
funds")  may be exchanged  for shares of  the Fund, Dean  Witter U.S. Government
Money Market  Trust,  Dean  Witter  Tax-Free Daily  Income  Trust,  Dean  Witter
California  Tax-Free Daily Income  Trust and Dean Witter  Liquid Asset Fund Inc.
(which five funds are hereinafter called  "money market funds"), and for  shares
of  Dean  Witter  Short-Term  U.S.  Treasury  Trust,  Dean  Witter  Limited Term
Municipal Trust, Dean Witter Short-Term  Bond Fund, Dean Witter Balanced  Income
Fund,  Dean Witter Balanced  Growth Fund and Dean  Witter Intermediate Term U.S.
Treasury Trust  (the foregoing  eleven non-FESC  or CDSC  funds are  hereinafter
collectively  referred  to  in  this  section  as  the  "Exchange  Funds"). When
exchanging into a money market fund from an FESC fund or a CDSC fund, shares  of
the  FESC fund or the CDSC fund are  redeemed at their next calculated net asset
value and exchanged for shares of the money market fund at their net asset value
determined the following business day. An exchange  from an FESC fund or a  CDSC
fund  to an 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.  Subsequently,  shares  of these  Exchange  Funds  received  in an
exchange for shares of an FESC fund  (regardless of the type of fund  originally
purchased)  may be redeemed and exchanged for shares of the Exchange Funds, FESC
funds or CDSC funds (however, shares of CDSC funds, including shares acquired in
exchange for (i) shares of FESC funds or (ii) shares of the Exchange Funds which
were acquired in exchange  for shares of  FESC funds, may  not be exchanged  for
shares  of FESC funds). Additionally, shares  of the money market funds received
in an  exchange for  shares of  a  CDSC fund  (regardless of  the type  of  fund
originally  purchased) may be redeemed and  exchanged for shares of the Exchange
Funds or CDSC funds. Ultimately, any applicable contingent deferred sales charge
("CDSC") will have  to be paid  upon redemption of  shares originally  purchased
from  a CDSC  fund. (If shares  of the  Exchange Funds received  in exchange for
shares originally purchased from a CDSC fund are exchanged for shares of another
CDSC fund having a different CDSC schedule than that of the CDSC fund from which
the Exchange Funds were acquired, the shares will be subject to the higher  CDSC
schedule.) During the period of time the shares originally purchased from a CDSC
fund  remain in the 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  reexchanged  for  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 CDSC fund are reacquired. Thus, the CDSC is based
upon the time (calculated as described above) the shareholder was invested 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 if any, incurred on or
after that date which  are attributable to those  shares (see "Purchase of  Fund
Shares  -- Plan of  Distribution" in the  respective Exchange Funds Prospectuses
for a description of Exchange Fund distribution fees). Exchanges involving  FESC
funds  or CDSC funds may be made after the  shares of the FESC fund or CDSC fund
acquired by purchase (not by exchange
 
                                       13
<PAGE>
or dividend reinvestment) have  been held for thirty  days. There is no  waiting
period for exchanges of shares acquired by exchange or dividend reinvestment.
 
    Exchange  Privilege accounts may also be  maintained for shareholders of the
money market funds who acquired their  shares in exchange for shares of  various
TCW/DW  Funds, a  group of  funds distributed by  the Distributor  for which TCW
Funds Management,  Inc.  serves  as  Adviser, under  the  terms  and  conditions
described  in the  Prospectus and  Statement of  Additional Information  of each
TCW/DW Fund.
 
    Purchases and  exchanges should  be  made for  investment purposes  only.  A
pattern  of frequent  exchanges may  be deemed by  the Investment  Manager to be
abusive and contrary to the best interests of the Fund's other shareholders and,
at the Investment Manager's discretion, may be limited by the Fund's refusal  to
accept  additional purchases and/  or exchanges from  the investor. Although the
Fund does not  have any  specific definition of  what constitutes  a pattern  of
frequent  exchanges,  and  will  consider all  relevant  factors  in determining
whether a particular situation is abusive and contrary to the best interests  of
the Fund and its other shareholders, investors should be aware that the Fund and
each  of the other 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.
 
    The  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 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 the  Exchange Funds, TCW/DW North
American Government  Income Trust,  TCW/DW  Income and  Growth Fund  and  TCW/DW
Balanced  Fund pursuant to the Exchange Privilege, and provided further that the
Exchange Privilege may be terminated or materially revised without notice  under
certain   unusual  circumstances  described  in   the  Statement  of  Additional
Information. Shareholders maintaining margin accounts with DWR or other Selected
Broker-Dealers are referred to their account executive regarding restrictions on
exchange of shares of the Fund pledged in the 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 and  any
other  conditions imposed by each fund. In the case of any shareholder holding a
share certificate or certificates, no exchanges may be made until all applicable
share certificates have been received by the Transfer Agent and deposited in the
shareholder's account.  An  exchange will  be  treated for  federal  income  tax
purposes  the  same  as  a  repurchase or  redemption  of  shares  on  which the
shareholder has realized a capital gain or loss. However, the ability to  deduct
capital  losses on an  exchange may be  limited in situations  where there is an
exchange of  shares within  ninety  days after  the  shares are  purchased.  The
Exchange  Privilege is only available in states where an exchange may legally be
made.
 
    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 above Dean
Witter Funds 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
 
                                       14
<PAGE>
Agent  an Exchange Privilege Authorization Form, copies of which may be obtained
from the Transfer Agent, to initiate  an exchange. If the Authorization Form  is
used,  exchanges may be made  in writing or by  contacting the Transfer Agent at
(800) 869-NEWS  (toll-free).  The  Fund will  employ  reasonable  procedures  to
confirm  that exchange instructions communicated over the telephone are genuine.
Such procedures may include requiring  various forms of personal  identification
such  as  name, mailing  address, social  security  or other  tax identification
number and  DWR  or  other  Selected  Broker-Dealer  account  number  (if  any).
Telephone  instructions  may  also  be  recorded.  If  such  procedures  are not
employed, the  Fund  may  be  liable  for any  losses  due  to  unauthorized  or
fraudulent  instructions. Telephone  exchange instructions  will be  accepted if
received by the Transfer Agent between 9:00 a.m. and 4:00 p.m. New York time, on
any day the New York Stock Exchange is open. Any shareholder wishing to make  an
exchange  who has previously filed an  Exchange Privilege Authorization Form and
who is unable to reach  the Fund by telephone should  contact his or her DWR  or
other  Selected  Broker-Dealer  account  executive, if  appropriate,  or  make a
written exchange  request.  Shareholders  are advised  that  during  periods  of
drastic  economic or market changes, it  is possible that the telephone exchange
procedures may  be  difficult to  implement,  although  this has  not  been  the
experience of 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.
 
REDEMPTION AND REPURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    A shareholder may withdraw all or any of his or her investments at any time,
without penalty or charge, by redeeming shares through the Transfer Agent at the
net asset  value per  share next  determined (see  "Purchase of  Fund Shares  --
Determination  of Net  Asset Value") after  the receipt of  a redemption request
meeting the applicable requirements as follows (all of which are subject to  the
General Redemption Requirements set forth below):
 
1. BY CHECK
 
    The  Transfer  Agent will  supply blank  checks to  any shareholder  who has
requested them on  an Investment  Application. The shareholder  may make  checks
payable  to the order of anyone in any amount not less than $500 (checks written
in amounts under $500 will not  be honored by the Transfer Agent).  Shareholders
must  sign checks exactly  as their shares  are registered. If  the account is a
joint account, the check may contain one signature unless the joint owners  have
specified  on an  Investment Application  that all  owners are  required to sign
checks. Only shareholders having  accounts in which  no share certificates  have
been issued will be permitted to redeem shares by check.
 
    Shares  will  be redeemed  at  their net  asset  value next  determined (see
"Purchase of Fund Shares -- Determination of Net Asset Value") after receipt  by
the  Transfer Agent of a  check which does not exceed  the value of the account.
Payment of the proceeds of  a check will normally be  made on the next  business
day  after receipt  by the Transfer  Agent of  the check in  proper form. Shares
purchased by  check (including  a certified  or bank  cashier's check)  are  not
normally  available to cover redemption checks  until fifteen days after receipt
of the check used for investment by the Transfer Agent. The Transfer Agent  will
not  honor a check in an  amount exceeding the value of  the account at the time
the check is presented for payment.
 
2. BY TELEPHONE OR WIRE INSTRUCTIONS WITH PAYMENT TO PREDESIGNATED BANK ACCOUNT
 
    A shareholder may redeem shares by telephoning or sending wire  instructions
to  the  Transfer Agent.  Payment  will be  made by  the  Transfer Agent  to the
shareholder's bank account at any
 
                                       15
<PAGE>
commercial bank designated by the  shareholder in an Investment Application,  by
wire  if  the amount  is $1,000  or more  and the  shareholder so  requests, and
otherwise by mail. Normally, the Transfer  Agent will transmit payment the  next
business  day following receipt of a request for redemption in proper form. Only
shareholders having accounts  in which  no share certificates  have been  issued
will be permitted to redeem shares by telephone or wire instructions.
 
    DWR  and  other  participating  Selected  Broker-Dealers  have  informed the
Distributor and the Fund that, on behalf of and as agent for their customers who
are shareholders  of the  Fund, they  will  transmit to  the Fund  requests  for
redemption of shares owned by their customers. In such cases, the Transfer Agent
will  wire proceeds of redemptions to  DWR's or another Selected Broker-Dealer's
bank account for  credit to  the shareholders' accounts  the following  business
day.  DWR and other participating Selected Broker-Dealers have also informed the
Distributor and the Fund that they do not charge for this service.
 
    Redemption instructions  must include  the  shareholder's name  and  account
number and be wired or called to the Transfer Agent:
 
    -- 800-869-NEWS (Toll-Free)
    -- Telex No. 125076
 
3. BY MAIL
 
    A  shareholder may redeem  shares by sending  a letter to  Dean Witter Trust
Company, P.O.  Box  983,  Jersey  City,  NJ  07303,  requesting  redemption  and
surrendering share certificates if any have been issued.
 
    Redemption  proceeds  will  be  mailed  to the  shareholder  at  his  or her
registered address or mailed or wired to his or her predesignated bank  account,
as  he or she may request. Proceeds of redemption may also be sent to some other
person, as requested by the shareholder.
 
GENERAL REDEMPTION REQUIREMENTS
 
    Written  requests  for   redemption  must  be   signed  by  the   registered
shareholder[s].  If  the  proceeds are  to  be  paid to  anyone  other  than the
registered shareholder[s] or sent  to any address  other than the  shareholder's
registered  address or predesignated bank account, 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  an eligible  guarantor), except  in the  case of  redemption  by
check.  Additional  documentation may  be required  where shares  are held  by a
corporation, partnership, trustee or executor. With regard to shares of the Fund
acquired pursuant to the Exchange Privilege, any applicable contingent  deferred
sales  charge will be imposed upon the  redemption of such shares (see "Purchase
of Fund Shares--Exchange Privilege").
 
    If shares to be redeemed are represented by a share certificate, the request
for redemption  must  be  accompanied  by the  share  certificate  and  a  share
assignment  form signed by the registered  shareholder[s] exactly as the account
is registered. Shareholders are advised, for  their own protection, to send  the
share  certificate and assignment form in  separate envelopes (if they are being
mailed and  not  hand delivered)  to  the  Transfer Agent.  Signatures  must  be
guaranteed  by  an  eligible guarantor  acceptable  to the  Transfer  Agent (see
above). Additional documentation  may be  required where  shares are  held by  a
corporation, partnership, trustee or executor.
 
    All   requests  for  redemption,  all   share  certificates  and  all  share
assignments should be sent  to Dean Witter Trust  Company, P.O. Box 983,  Jersey
City, NJ 07303.
 
    Generally,  the Fund  will attempt to  make payment for  all redemptions and
repurchases within one business day, but in no event later than seven days after
receipt of such redemption request in proper form. However, if the shares  being
redeemed or repurchased were purchased by check
(includ-
 
                                       16
<PAGE>
ing a certified or bank cashier's check), payment 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). In addition, the Fund may postpone redemptions or repurchases at certain
times when normal trading is not taking place on the New York Stock Exchange.
 
    The  Fund reserves  the right, on  60 days'  notice, to redeem  at their net
asset value  the  shares  of any  shareholder  (other  than shares  held  in  an
Individual  Retirement Account or  custodial account under  Section 403(b)(7) of
the Internal Revenue Code)  whose shares due to  redemptions by the  shareholder
have  a value of less than $1,000, or such  lesser amount as may be fixed by the
Board of Trust
ees.
 
AUTOMATIC REDEMPTION PROCEDURE
 
    The Distributor has  instituted an automatic  redemption procedure which  it
may  utilize to satisfy amounts due it  by a shareholder maintaining a brokerage
account with DWR or another Selected Broker-Dealer, as a result of purchases  of
securities  or other transactions in  the shareholder's brokerage account. Under
this procedure, if the shareholder elects to participate by so notifying DWR  or
another   Selected  Broker-Dealer,  the  shareholder's  DWR  or  other  Selected
Broker-Dealer brokerage account will be scanned  each business day prior to  the
close  of business  (4:00 P.M.,  New York time).  After application  of any cash
balances in the account, a sufficient number  of Fund shares may be redeemed  at
the  close  of business  to satisfy  any  amounts for  which the  shareholder is
obligated to make payment  to DWR or  other Selected Broker-Dealer.  Redemptions
will  be effected  on the  business day  preceding the  date the  shareholder is
obligated to make  such payment, and  DWR or other  Selected Broker-Dealer  will
receive  the  redemption  proceeds on  the  day following  the  redemption date.
Shareholders will receive all dividends declared and reinvested through the date
of redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS AND DISTRIBUTIONS.  The  Fund declares dividends, payable on  each
day  the New York Stock Exchange  is open for business, of  all of its daily net
investment income to  shareholders of  record as of  the close  of business  the
preceding  business day.  Dividends from net  short-term capital  gains, if any,
will be paid periodically. The amount of dividend may fluctuate from day to  day
and  may be omitted on some days  if net realized losses on portfolio securities
exceed  the  Fund's   net  investment   income.  Dividends   are  declared   and
automatically  reinvested daily in additional full  and fractional shares of the
Fund (rounded to the last 1/100 of a share) at the net asset value per share  at
the close of business on that day. 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 year.
 
    Shareholders may  instruct the  Transfer Agent  (in writing)  to have  their
dividends paid out monthly in cash. For such shareholders, the shares reinvested
and  credited to their account during the month will be redeemed as of the close
of business on the monthly  payment date (which will be  no later than the  last
business  day of  the month)  and the proceeds  will be  paid to  them by check.
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.
 
    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.
 
    TAXES.  Because the Fund intends to distribute substantially all of its  net
investment income and net
 
                                       17
<PAGE>
capital gains, if any, to shareholders, and intends to otherwise comply with all
the  provisions of Subchapter M of the Internal Revenue Code of 1986, as amended
(the "Code"), to qualify as a  regulated investment company, 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, dividends  from net  investment income to
shareholders, whether taken  in cash  or reinvested in  additional Fund  shares,
will  be excludable  from gross  income for federal  income tax  purposes to the
extent net interest 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   Code  subjects  interest  received  on  certain  otherwise  tax-exempt
securities to an alternative minimum  tax. This alternative minimum tax  applies
to interest received on "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 governmental 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 may invest without
limit in  such "private  activity bonds,"  with the  result that  a  substantial
portion  of the exempt-interest dividends paid by the Fund may 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 have
to  include  a  portion  of  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.
 
    After the  end  of  its calendar  year,  the  shareholders will  be  sent  a
statement  indicating  the percentage  of  the dividend  distributions  for such
taxable 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. (Unlike federal law,  no
portion  of  the  exempt-interest  dividends  will  constitute  an  item  of tax
preference for New York personal income tax purposes.) This percentage should be
applied uniformly to any distributions made during the taxable 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.
 
    To  the  extent  that  dividends  are  derived  from  interest  on  New York
tax-exempt securities, such dividends  will also be exempt  from New York  State
and  New York City personal income  taxes. Shareholders will normally be subject
to federal and New York State and New York City personal income tax on dividends
paid from interest income derived  from taxable securities and on  distributions
of net capital gains. For federal and New York State or New York City income tax
purposes,  distributions of net long-term capital  gains, if any, are taxable to
shareholders 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%  backup
withholding  tax on  taxable dividends and  capital gains  distributions and the
proceeds of redemptions and  repurchases, shareholders' taxpayer  identification
numbers must be furnished and certified as to accuracy.
 
    Interest  on  indebtedness incurred  by shareholders  or related  parties 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
or New York State or New York City personal income tax purposes.
 
                                       18
<PAGE>
<TABLE>
<S>                                                                                                           <C>  <C>  <C>  <C>
                                                                                                                5   5   0    --
                                                                                                                for office use only

                                                                                                                     [logo]

 
</TABLE>
 
                                                  [REMOVE APPLICATION CAREFULLY]
APPLICATION
 
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
Send to: Dean Witter Trust Company (the "Transfer Agent"), P.O. Box 1040, 
Jersey City, NJ 07303

INSTRUCTIONS     For assistance in completing this application, telephone Dean 
                 Witter Trust Company at (800) 869-NEWS (Toll-Free).

<TABLE>
<S>             <C>                                                          <C>
TO REGISTER
SHARES
(please print)  1.
                  ---------------------------------------------------------------------------------------------------
                   First Name                                                 Last Name


- -As joint
 tenants,
 use line 1 & 2   2.
                    ---------------------------------------------------------------------------------------------------
                    First Name                                                  Last Name
                    (Joint tenants with rights of survivorship unless otherwise specified)
 
                                                                     ---------------------------------------
                                                                           Social Security Number

- -As custodian
 for a minor,       
 use lines 1 & 3  3.
                    -------------------------------------------------------------------------------------------------
                                                               Minor's Name
 
                                                                     ---------------------------------------
                                                                           Minor's Social Security Number

                      Under the ___________________________ Uniform Gifts to Minors Act
                                State of Residence of Minor
- -In the name of a
 corporation,       4.
 trust,               ---------------------------------------------------------------------------------------------------
 partnership
 or other                                    Name of Corporation, Trust (including trustee name(s)) or Other Organization
 institutional
 investors,
 use
 line 4              ---------------------------------------------------------------------------------------------------


                                                                     ---------------------------------------
                                                                           Tax Identification Number


                            If Trust, Date of Trust Instrument: _____________________________

ADDRESS              ---------------------------------------------------------------------------------------------------

                     ---------------------------------------------------------------------------------------------------
                                  City                        State                           Zip Code
TO PURCHASE
SHARES:
Minimum Initial      / / CHECK (enclosed) $________________ (Make Payable to Dean Witter New York Municipal Money Market Trust)
Investment:
$5,000               / / WIRE*  On_______________           MF* _________________________________
                                       (Date)                  (Control number, this transaction)
 

                        --------------------------------------------------------------------------------------------------
                        Name of Bank                                                                        Branch

                        --------------------------------------------------------------------------------------------------
                        Address

                        --------------------------------------------------------------------------------------------------
                        Telephone Number

                        * For an initial investment made by wiring funds, obtain a control number by calling: (800) 869-NEWS (Toll
                          Free) or (201) 413-7067.
                          Your bank should wire to:

                        Bank of New York for credit to account of Dean Witter Trust Company

                        Account Number: 8900188413

                        Re: Dean Witter New York Municipal Money Market Trust

                        Account Of: _____________________________________________

                                    (Investor's Account as Registered at the Transfer Agent)

                        Control or Account Number:______________________________________
                                                   (Assigned by Telephone)


                                                         OPTIONAL SERVICES

 
                     NOTE: If you are a current shareholder of Dean Witter New York Municipal Market Trust, please
                     indicate your fund account number here.
                        [5]   [5]   [0]  -  
                                            ------------------------------
DIVIDENDS            All dividends will be reinvested daily in additional shares, unless the following option is selected:

                     / / Pay income dividends by check at the end of each month.

WRITE YOUR OWN       / / Send an initial supply of checks.
CHECK                FOR JOINT ACCOUNTS:
                     / / Check this box if all owners are required to sign checks.

SYSTEMATIC           / / Systematic Withdrawal Plan ($25 minimum)            Percentage of balance (annualized basis)
WITHDRAWAL           $_____________ / / Monthly or / / Quarterly             __________% / / Monthly or / / Quarterly
PLAN                                / / 10th   or / / 25th of Month/Quarter   / / 10th   or / / 25th of Month/Quarter
Minimum              / / Pay shareholder(s) at address of record.
Account Value:       / / Pay to the following: (If this payment option is selected a signature guarantee is required)
$5,000               


                 --------------------------------------------------------------------------------------------------
                 Name

                 --------------------------------------------------------------------------------------------------
                 Address

                 --------------------------------------------------------------------------------------------------
                 City                                  State                                        Zip Code
</TABLE>

<PAGE>

<TABLE>
<S>                         <C>                                                <C>
PAYMENT TO                  /  /    Dean Witter  Trust  Company is  hereby  authorized  to honor  telephonic  or other
PREDESIGNATED                       instructions, without signature guarantee,  from any person for  the redemption of any
BANK ACCOUNT                        or all shares of Dean  Witter New York Municipal Money Market Trust held in my (our)
                                    account provided that proceeds  are transmitted only to  the following bank  account.
                                    (Absent  its own  negligence, neither  Dean Witter  New York Municipal Money Market Trust
                                    nor Dean Witter Trust  Company (the "Transfer Agent")  shall be liable for  any
                                    redemption caused by unauthorized instruction(s)):
Bank Account must be in
same name as shares are
registered                  --------------------------------------------------------------   ----------------------------
                            NAME & BANK ACCOUNT NUMBER                                        BANK'S ROUTING TRASMIT CODE
                                                                                                     (ASK YOUR BANK)
Minimum Amount:
$1,000                      ---------------------------------------------------------------
                            NAME OF BANK

                            ---------------------------------------------------------------
                            ADDRESS OF BANK

                            (       )
                            ---------------------------------------------------------------
                            TELEPHONE NUMBER OF BANK

                                                             SIGNATURE AUTHORIZATION

FOR ALL ACCOUNTS            NOTE: RETAIN A COPY OF THIS DOCUMENT FOR YOUR RECORDS. ANY MODIFICATION OF THE INFORMATION
                            BELOW  WILL REQUIRE AN AMENDMENT TO  THIS FORM. THIS DOCUMENT IS  IN FULL FORCE AND EFFECT
                            UNTIL ANOTHER DULY EXECUTED FORM IS RECEIVED BY THE TRANSFER AGENT.

                            The "Transfer Agent"  is hereby authorized  to act as  agent for the  registered owner  of
                            shares  of Dean Witter  New  York  Municipal Money Market Trust (the  "Fund") in effecting
                            redemptions of shares and is authorized to recognize the signature(s) below in payment  of
                            funds  resulting from such redemptions on behalf  of the registered owners of such shares.
                            The Transfer Agent  shall be liable  only for its  own negligence and  not for 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.

                            I (we) certify to my (our) legal capacity, or the capacity of the investor named above, to
                            invest in and redeem shares of, and I (we) acknowledge receipt of a current prospectus of,
                            Dean Witter New York  Municipal  Money  Market  Trust and  (we) further  certify my  (our)
                            authority to sign and act for and on behalf of the investor.

                            Under penalties of perjury, I certify (1) that the number shown on this form is my correct
                            taxpayer  identification number and (2) that I am not subject to backup withholding either
                            because I have not been notified that I am subject to backup withholding as a result of  a
                            failure  to report all interest or dividends, or the Internal Revenue Service has notified
                            me that I am no longer subject to  backup withholding. (Note: You must cross out item  (2)
                            above  if  you  have  been notified  by  IRS  that  you are  currently  subject  to backup
                            withholding because of underreporting interest or dividends on your tax return.)

                            For Individual, Joint and Custodial Accounts for Minors, Check Applicable Box:
                            / / I am a United States Citizen.                     / / I am not a United States Citizen.

                                                  SIGNATURE(S) (IF JOINT TENANTS, ALL MUST SIGN)

Name(s) must be
signed exactly the
same as shown on
lines 1 to 4 on the
reverse side of this
application
                            SIGNATURE MUST BE KEPT WITHIN ABOVE AREA           SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

                            SIGNATURE MUST BE KEPT WITHIN ABOVE AREA           SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

                      SIGNED THIS ___________________  DAY OF ____________________, 19__.

                                         FOR CORPORATIONS, TRUSTS, PARTNERSHIPS AND OTHER ORGANIZATIONS

                      The following  named  persons  are  currently  officers/trustees/general  partners/other  authorized
                      signatories  of the Registered  Owner, and any __* of them ("Authorized Person(s)") is/are currently
                      authorized under  the applicable  governing document  to  act with  full power  to sell,  assign  or
                      transfer  securities  of the  the Fund  for  the Registered  Owner and  to  execute and  deliver any
                      instrument necessary to effectuate the authority hereby conferred:

                                         NAME/TITLE                                          SIGNATURE
In addition,
complete
Section A or B
below.
                            SIGNATURE MUST BE KEPT WITHIN ABOVE AREA           SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

                            SIGNATURE MUST BE KEPT WITHIN ABOVE AREA           SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

                            SIGNATURE MUST BE KEPT WITHIN ABOVE AREA           SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

                      SIGNED THIS ___________________  DAY OF ____________________, 19__.

                      The Transfer Agent may, without inquiry, act  only upon the instruction of ANY PERSON(S)  purporting
                      to  be (an) Authorized  Person(s) as named in  the Certification Form last  received by the Transfer
                      Agent. The Transfer Agent and the Fund shall not be liable for any claims, expenses (including legal
                      fees) or losses  resulting from  the Transfer  Agent having  acted upon  any instruction  reasonably
                      believed genuine.

                      ----------------------------------------------------------------------------------------------------
                      *INSERT  A NUMBER. UNLESS OTHERWISE INDICATED, THE TRANSFER  AGENT MAY HONOR INSTRUCTIONS OF ANY ONE
                       OF THE PERSONS NAMED ABOVE.

SECTION (A)           NOTE: EITHER A SIGNATURE GUARANTEE OR CORPORATE SEAL IS REQUIRED.
CORPORATIONS AND
INCORPORATED
ASSOCIATIONS ONLY.    I, ______________________, Secretary of the Registered Owner, do hereby  certify that at a meeting
                      on _____________________ at which a  quorum was  present throughout, the Board of Directors of the
                      corporation/the officers of the association duly adopted a resolution, which is in full  force and
SIGN ABOVE AND COM-   effect and in accordance with the Registered Owner's charter and  by-laws,  which  resolution  did
PLETE THIS            the  following:  (1)  empowered   the  above-named   Authorized  Person(s)  to  effect  securities
SECTION               transactions for  the Registered Owner on  the terms described above; (2) authorized the Secretary
                      to certify, from time to time, the names and  titles of  the officers of the Registered  Owner and
                      to notify the  Transfer Agent when changes in office occur;  and  (3) authorized the  Secretary to
                      certify that such  a resolution has been duly  adopted and  will  remain in  full force and effect
                      until the  Transfer Agent  receives a  duly execute amendment to the Certification Form.
SIGNATURE
GUARANTEE**           Witness my hand on behalf of the corporation/association this__________ day of ___________ , 19__.
(or Corporate Seal)

                                                 ------------------------------------------------------------------------
                                                                                Secretary**

                      The undersigned officer (other than the Secretary) hereby certifies that the foregoing  instrument
                      has been signed by the Secretary of the corporation/association.

SIGNATURE
GUARANTEE**
(or Corporate Seal)
                                                 ------------------------------------------------------------------------
                                                    Certifying Officer of the Corporation or Incorporated Association**

SECTION (B) ALL       NOTE: A SIGNATURE GUARANTEE IS REQUIRED.
OTHER
INSTITUTIONAL
INVESTORS                          ---------------------------------------------------------------------------------------
                                                                            Certifying
SIGNATURE                                                    Trustee(s)/General Partner(s)/Other(s)**
GUARANTEE**

SIGN ABOVE AND COM-                ---------------------------------------------------------------------------------------
PLETE THIS SECTION                                                          Certifying
                                                             Trustee(s)/General Partner(s)/Other(s)**

                      ----------------------------------------------------------------------------------------------------
                      **SIGNATURE(S) MUST BE GUARANTEED BY AN ELIBIGLE GUARANTOR

DEALER                Above signature(s) guaranteed. Prospectus has been delivered by undersigned to above-named applicant(s).
(if any)
Completion by 
dealer only
                      ------------------------------------------   ------------------------------------------------------
                      Firm Name                                    Office Number-Account Number at Dealer-A/E Number

                      ------------------------------------------   ------------------------------------------------------
                      Address                                      Account Executive's Last Name

                      ------------------------------------------   ------------------------------------------------------
                      City, State, Zip Code                        Branch Office

- -Registered Trademark- 1997 Dean Witter Distributors Inc.
</TABLE>


<PAGE>
    The  foregoing relates to federal income taxation  and to New York State and
New York City  personal income  taxation as  in effect as  of the  date of  this
Prospectus.
 
    Shareholders  should consult their  tax advisers as  to the applicability of
the above to their own tax situation.
 
CURRENT AND EFFECTIVE YIELD
 
    From time to  time the Fund  advertises its "yield"  and "effective  yield."
Both  yield figures  are based  on historical earnings  and are  not intended to
indicate future  performance. The  "yield"  of the  Fund  refers to  the  income
generated  by an  investment in  the Fund over  a given  seven-day period (which
period will be stated in the  advertisement). This income is then  "annualized."
That  is, the amount of income generated by the investment during that seven-day
period is assumed to be generated each seven-day period within a 365-day  period
and  is shown  as a percentage  of the  investment. The "effective  yield" for a
seven-day period  is  calculated similarly,  but,  when annualized,  the  income
earned by an investment in the Fund is assumed to be reinvested each week within
a 365-day period. The "effective yield" will be slightly higher than the "yield"
because  of the  compounding effect of  this assumed reinvestment.  The Fund may
also quote tax-equivalent yield which  is calculated by determining the  pre-tax
yield  which, after  being taxed at  a stated  rate, would be  equivalent to the
yield determined as described above. The  Fund may also advertise the growth  of
hypothetical investments of $10,000, $50,000 and $100,000 in shares of the Fund.
 
ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
    VOTING  RIGHTS.  All shares of beneficial  interest of the Fund are of $0.01
par value and are equal as to earnings, assets and voting privileges.
 
    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 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 notice
of such disclaimer be given in each  instrument entered into or executed by  the
Fund  and provides for indemnification and  reimbursement of expenses out of the
Fund's property for any shareholder  held personally liable for the  obligations
of the Fund. Thus, the risk of a shareholder incurring financial loss on account
of  shareholder liability is  limited to circumstances in  which the Fund itself
would be  unable  to  meet  its obligations.  Given  the  above  limitations  on
shareholder  personal  liability  and  the  nature  of  the  Fund's  assets  and
operations, the possibility of the Fund being unable to meet its obligations  is
remote  and, in the  opinion of Massachusetts  counsel to the  Fund, the risk to
Fund shareholders of personal liability is remote.
 
    CODE OF ETHICS.   Directors,  officers and employees  of 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
 
                                       19
<PAGE>
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
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.
 
    SHAREHOLDER  INQUIRIES.  All inquiries regarding the Fund should be directed
to the Fund  or the Transfer  Agent at one  of the telephone  numbers or at  the
address, as are set forth on the front cover of this Prospectus.
 
                                       20
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
FINANCIAL STATEMENTS
 
STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 1996
 
<TABLE>
<S>                                                           <C>
ASSETS:
Investments in securities, at value (amortized cost
  $40,813,296)..............................................  $40,813,296
Cash........................................................       30,444
Interest receivable.........................................      215,468
Prepaid expenses............................................        9,175
                                                              -----------
     TOTAL ASSETS...........................................   41,068,383
                                                              -----------
LIABILITIES:
Payable for:
    Shares of beneficial interest repurchased...............      206,090
    Investment management fee...............................       18,354
    Plan of distribution fee................................        3,671
Accrued expenses............................................       82,022
                                                              -----------
     TOTAL LIABILITIES......................................      310,137
                                                              -----------
NET ASSETS:
Paid-in-capital.............................................   40,758,640
Accumulated undistributed net investment income.............           27
Accumulated net realized loss...............................         (421)
                                                              -----------
     NET ASSETS.............................................  $40,758,246
                                                              -----------
                                                              -----------
NET ASSET VALUE PER SHARE,
  40,758,640 SHARES OUTSTANDING (UNLIMITED SHARES AUTHORIZED
  OF $.01 PAR VALUE)........................................
                                                                    $1.00
                                                              -----------
                                                              -----------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       21
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 1996
 
<TABLE>
<S>                                                           <C>
NET INVESTMENT INCOME:
INTEREST INCOME.............................................  $1,452,610
                                                              ----------
EXPENSES
Investment management fee...................................     212,463
Transfer agent fees and expenses............................      44,442
Professional fees...........................................      44,188
Shareholder reports and notices.............................      40,952
Plan of distribution fee....................................      38,852
Trustees' fees and expenses.................................      13,132
Custodian fees..............................................       5,830
Registration fees...........................................       5,075
                                                              ----------
     TOTAL EXPENSES.........................................     404,934
     LESS: EXPENSE OFFSET...................................      (4,490)
                                                              ----------
     NET EXPENSES...........................................     400,444
                                                              ----------
NET INVESTMENT INCOME AND NET INCREASE......................  $1,052,166
                                                              ----------
                                                              ----------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       22
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET 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 and net increase......................     $ 1,052,166         $ 1,220,084
Dividends from net investment income........................      (1,052,173)         (1,220,068)
Net increase (decrease) from transactions in shares of
  beneficial interest.......................................       1,650,231            (520,873)
                                                              -----------------   -----------------
     NET INCREASE (DECREASE)................................       1,650,224            (520,857)
NET ASSETS:
Beginning of period.........................................      39,108,022          39,628,879
                                                              -----------------   -----------------
     END OF PERIOD
    (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF $27
    AND $34, RESPECTIVELY)..................................     $40,758,246         $39,108,022
                                                              -----------------   -----------------
                                                              -----------------   -----------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       23
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
NOTES TO FINANCIAL STATEMENTS DECEMBER 31, 1996
 
1. ORGANIZATION AND ACCOUNTING POLICIES
 
Dean Witter New York Municipal Money Market Trust (the "Fund") is registered
under the Investment Company Act of 1940, as amended (the "Act"), as a
non-diversified, open-end management investment company. The Fund's investment
objective is to provide a high level of daily income which is exempt from
federal and New York income tax, consistent with stability of principal and
liquidity. The Fund was organized as a Massachusetts business trust on December
28, 1989 and commenced operations on March 20, 1990.
 
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 at amortized
cost, which approximates market value.
 
B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on the
trade date (date the order to buy or sell is executed). Realized gains and
losses on security transactions are determined on the identified cost method.
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 shareholders as of the close of each business day.
 
2. INVESTMENT MANAGEMENT AGREEMENT
 
Pursuant to an Investment Management Agreement with the 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 net assets of the Fund 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;
 
                                       24
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
NOTES TO FINANCIAL STATEMENTS DECEMBER 31, 1996, CONTINUED
 
0.35% to the portion of daily net assets exceeding $1 billion but not exceeding
$1.5 billion; 0.325% to the portion of daily net assets exceeding $1.5 billion
but not exceeding $2 billion; 0.30% to the portion of daily net assets exceeding
$2 billion but not exceeding $2.5 billion; 0.275% to the portion of daily net
assets exceeding $2.5 billion but not exceeding $3 billion; and 0.25% to the
portion of daily net assets exceeding $3 billion.
 
Under the terms of the Agreement, in addition to managing the Fund's
investments, the Investment Manager maintains certain of the Fund's books and
records and furnishes, at its own expense, office space, facilities, equipment,
clerical, bookkeeping and certain legal services and pays the salaries of all
personnel, including officers of the Fund who are employees of the Investment
Manager. The Investment Manager also bears the cost of telephone services, heat,
light, power and other utilities provided to the Fund.
 
3. PLAN OF DISTRIBUTION
 
Dean Witter Distributors Inc. (the "Distributor"), an affiliate of the
Investment Manager, is the distributor of the Fund's shares and, in accordance
with a Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the Act,
finances certain expenses in connection therewith.
 
Under the Plan, the Distributor bears the expense of all promotional and
distribution related activities on behalf of the Fund, except for expenses that
the Trustees determine to reimburse, as described below. The following
activities and services may be provided by the Distributor and other
broker-dealers under the Plan: (1) compensation to, and expenses of, the
Distributor and other broker-dealers; (2) sales incentives and bonuses to sales
representatives and to marketing personnel in connection with promoting sales of
the Fund's shares; (3) expenses incurred in connection with promoting sales of
the Fund's shares; (4) preparing and distributing sales literature; and (5)
providing advertising and promotional activities, including direct mail
solicitation and television, radio, newspaper, magazine and other media
advertisements.
 
The Fund is authorized to reimburse the Distributor for specific expenses the
Distributor incurs or plans to incur in promoting the distribution of the Fund's
shares. The amount of each monthly reimbursement payment may in no event exceed
an amount equal to a payment at the annual rate of 0.15% of the Fund's average
daily net assets during the month. Expenses incurred by the Distributor pursuant
to the Plan in any fiscal year will not be reimbursed by the Fund through
payments accrued in any subsequent fiscal year. For the year ended December 31,
1996, the distribution fee was accrued at the annual rate of 0.09%.
 
                                       25
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
NOTES TO FINANCIAL STATEMENTS DECEMBER 31, 1996, CONTINUED
 
4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES
 
The cost of purchases and proceeds from sales/maturities of portfolio securities
for the year ended December 31, 1996 aggregated $99,829,670 and $98,130,000,
respectively.
 
Dean Witter Trust Company, an affiliate of the Investment Manager and
Distributor, is the Fund's transfer agent. At December 31, 1996, the Fund had
transfer agent fees and expenses payable of approximately $4,800.
 
The Fund has an unfunded noncontributory defined benefit pension plan covering
all independent Trustees of the Fund who will have served as independent
Trustees for at least five years at the time of retirement. Benefits under this
plan are based on years of service and compensation during the last five years
of service. Aggregate pension costs for the year ended December 31, 1996
included in Trustees' fees and expenses in the Statement of Operations amounted
to $926. At December 31, 1996, the Fund had an accrued pension liability of
$46,027 which is included in accrued expenses in the Statement of Assets and
Liabilities.
 
5. SHARES OF BENEFICIAL INTEREST
 
Transactions in shares of beneficial interest, at $1.00 per share, were as
follows:
 
<TABLE>
<CAPTION>
                                                     FOR THE YEAR     FOR THE YEAR
                                                        ENDED            ENDED
                                                     DECEMBER 31,     DECEMBER 31,
                                                         1996             1995
                                                    --------------   --------------
<S>                                                 <C>              <C>
Shares sold.......................................     94,893,021      107,855,356
Shares issued in reinvestment of dividends........      1,052,173        1,220,068
                                                    --------------   --------------
                                                       95,945,194      109,075,424
Shares repurchased................................    (94,294,963)    (109,596,297)
                                                    --------------   --------------
Net increase (decrease) in shares outstanding.....      1,650,231         (520,873)
                                                    --------------   --------------
                                                    --------------   --------------
</TABLE>
 
6. SELECTED PER SHARE DATA AND RATIOS
 
See the "Financial Highlights" table on page 4 of this Prospectus.
 
                                       26
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
PORTFOLIO OF INVESTMENTS DECEMBER 31, 1996
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                                                 COUPON    DEMAND
THOUSANDS                                                                 RATE+     DATE*         VALUE
- ----------------------------------------------------------------------------------------------------------
<C>         <S>                                                           <C>     <C>          <C>
            NEW YORK TAX-EXEMPT SHORT-TERM VARIABLE RATE MUNICIPAL OBLIGATIONS (65.0%)
 $  900     Babylon, Ser 1994 B (AMBAC).................................   3.90 %   01/08/97   $   900,000
  1,000     New York City Cultural Resources Trust, Solomon R.
              Guggenheim Foundation Ser 1990 B..........................   4.80     01/02/97     1,000,000
  1,000     New York City Housing Development Corporation, Multi-family
              1994 Ser A................................................   4.15     01/08/97     1,000,000
            New York City Industrial Development Agency,
    650     Composite Offering I (AMT)..................................   4.10     01/08/97       650,000
    900     Composite Offering XXV 1990 Ser E (AMT).....................   4.10     01/08/97       900,000
  1,600     Brooklyn Navy Yard Cogen Ser 1995 A (AMT)...................   4.15     01/08/97     1,600,000
    900     The Berkeley Carroll School Ser 1993........................   4.15     01/08/97       900,000
  1,000     The Calhoun School Inc Ser 1990.............................   3.90     01/08/97     1,000,000
    950     The Columbia Grammar & Preparatory School Ser 1994..........   4.15     01/08/97       950,000
  1,900     New York Local Government Assistance Corporation, Ser 1994
              B.........................................................   4.00     01/08/97     1,900,000
            New York State Dormitory Authority,
  2,000     Metropolitan Museum of Art Ser A............................   4.00     01/08/97     2,000,000
  1,400     Oxford University Press Inc Ser 1993........................   5.45     01/02/97     1,400,000
            New York State Energy Research & Development Authority,
  1,900     Central Hudson Gas & Electric Corp Ser 1987 A (AMT).........   3.90     01/08/97     1,900,000
  1,000     Long Island Lighting Co Ser 1985 B..........................   3.25     03/01/97     1,000,000
  1,000     Long Island Lighting Co Ser 1993 (AMT)......................   4.00     01/08/97     1,000,000
  1,000     Rochester Gas & Electric Corp Ser 1985......................   3.60     11/15/97     1,000,000
  1,000     New York State Housing Finance Agency, East 84th Street Ser
              A.........................................................   4.15     01/08/97     1,000,000
    700     New York State Medical Care Facilities Finance Agency, The
              Children's Hospital of Buffalo 1991 Ser A.................   4.20     01/08/97       700,000
  1,600     Port Authority of New York & New Jersey, Ser 5..............   4.85     01/02/97     1,600,000
  1,000     St Lawrence County Industrial Development Agency, Reynolds
              Metals Co Ser 1995 (AMT)..................................   4.00     01/08/97     1,000,000
  1,100     Syracuse Industrial Development Agency, Syracuse University
              Eggers Hall Ser 1993......................................   4.80     01/02/97     1,100,000
  2,000     Triborough Bridge and Tunnel Authority, Ser 1994 (FGIC).....   4.00     01/08/97     2,000,000
                                                                                               -----------
            TOTAL NEW YORK TAX-EXEMPT SHORT-TERM VARIABLE RATE MUNICIPAL OBLIGATIONS
            (AMORTIZED COST $26,500,000)....................................................    26,500,000
                                                                                               -----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                              YIELD TO
                                                                                              MATURITY
                                                                          COUPON   MATURITY  ON DATE OF
                                                                           RATE      DATE     PURCHASE
                                                                          ------   --------  ----------
<C>         <S>                                                           <C>      <C>       <C>          <C>
            NEW YORK TAX-EXEMPT COMMERCIAL PAPER (22.8%)
  1,000     Municipal Assistance Corporation for the City of New York,
              Ser F.....................................................      3.50% 02/19/97       3.50%    1,000,000
  1,000     New York City, Fiscal 1996 Ser J Subser J-2.................      3.10 03/19/97        3.10     1,000,000
  1,200     New York City Municipal Water Finance Authority, Ser One....      3.55 03/06/97        3.55     1,200,000
  1,300     New York State, Ser R BANs..................................      3.35 02/24/97        3.35     1,300,000
  1,000     New York State Dormitory Authority, Sloan-Kettering Cancer
              Center Ser 1989 C.........................................      3.55 02/14/97        3.55     1,000,000
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       27
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
PORTFOLIO OF INVESTMENTS DECEMBER 31, 1996, CONTINUED
 
<TABLE>
<CAPTION>
                                                                                              YIELD TO
PRINCIPAL                                                                                     MATURITY
AMOUNT IN                                                                 COUPON   MATURITY  ON DATE OF
THOUSANDS                                                                  RATE      DATE     PURCHASE       VALUE
- ---------------------------------------------------------------------------------------------------------------------
<C>         <S>                                                           <C>      <C>       <C>          <C>
 $1,100     New York State Environmental Facilities Corporation, General
              Electric Co Ser 1987 A....................................      3.50% 02/25/97       3.50%  $ 1,100,000
  1,000     Niagara County Industrial Development Authority, American
              Ref-Fuel Co Ser 1994 B (AMT)..............................      3.70 02/05/97        3.70     1,000,000
            Puerto Rico Government Development Bank,
    900       Ser 1996..................................................      3.45 02/10/97        3.45       900,000
    800       Ser 1996..................................................      3.55 02/06/97        3.55       800,000
                                                                                                          -----------
            TOTAL NEW YORK TAX-EXEMPT COMMERCIAL PAPER
            (AMORTIZED COST $9,300,000)................................................................     9,300,000
                                                                                                          -----------
            NEW YORK TAX-EXEMPT SHORT-TERM MUNICIPAL NOTES (12.3%)
  1,000     Half Hollow Hills Central School District, 1996-1997 TANs,
              dtd 07/11/96..............................................      4.25 06/27/97        3.85     1,001,866
  1,000     Monroe County, Ser 1996 BANs, dtd 06/07/96..................      4.50 06/06/97        3.65     1,003,501
  1,000     Smithtown Central School District, 1996-97 TANs, dtd
              07/02/96..................................................      4.25 06/26/97        3.90     1,001,623
  1,000     Three Village Central School District, 1996-97 TANs, dtd
              07/11/96..................................................      4.50 06/30/97        3.85     1,003,086
  1,000     Puerto Rico, Ser 1997 A TRANs, dtd 12/17/96.................      4.00 07/30/97        3.43     1,003,220
                                                                                                          -----------
            TOTAL NEW YORK TAX-EXEMPT SHORT-TERM MUNICIPAL NOTES
            (AMORTIZED COST $5,013,296)................................................................     5,013,296
                                                                                                          -----------
            TOTAL INVESTMENTS
            (AMORTIZED COST $40,813,296) (A)............................  100.1%    40,813,296
            LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS..............   (0.1)       (55,050)
                                                                          ------   -----------
            NET ASSETS..................................................  100.0%   $40,758,246
                                                                          ------   -----------
                                                                          ------   -----------
<FN>
- ---------------------
AMT  Alternative Minimum Tax.
BANs Bond Anticipation Notes.
TANs Tax Anticipation Notes.
TRANs Tax Revenue Anticipation Notes.
 +   Rate shown is the rate in effect at December 31, 1996.
 *   Date on which the principal amount can be recovered through demand.
(a)  Cost is the same for federal income tax purposes.
BOND INSURANCE:
AMBAC AMBAC Indemnity Corporation.
FGIC Financial Guaranty Insurance Company.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       28
<PAGE>
DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET TRUST
REPORT OF INDEPENDENT ACCOUNTANTS
 
TO THE SHAREHOLDERS AND TRUSTEES
OF DEAN WITTER NEW YORK MUNICIPAL MONEY MARKET 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 (appearing in the "Financial
Highlights" table on page 4 of this Prospectus) present fairly, in all material
respects, the financial position of Dean Witter New York Municipal Money Market
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 six years in the
period then ended and for the period March 20, 1990 (commencement of operations)
through December 31, 1990, 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, provide a reasonable basis for the opinion expressed above.
 
PRICE WATERHOUSE LLP
1177 AVENUE OF THE AMERICAS
NEW YORK, NEW YORK 10036
FEBRUARY 6, 1997
 
                      1996 FEDERAL TAX NOTICE (UNAUDITED)
 
       During  the year  ended December  31, 1996,  the Fund  paid to the
       shareholders $0.025 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.
 
                                       29
<PAGE>
                 (This page has been left blank intentionally.)
<PAGE>
                 (This page has been left blank intentionally.)
<PAGE>
                        THE DEAN WITTER FAMILY OF FUNDS
 
MONEY MARKET FUNDS                       Dean Witter Global Short-Term Income
Dean Witter Liquid Asset Fund Inc.       Fund Inc.
Dean Witter Tax-Free Daily Income Trust  Dean Witter Multi-State Municipal
Dean Witter New York Municipal Money     Series Trust
Market Trust                             Dean Witter Premier Income Trust
Dean Witter California Tax-Free Daily    Dean Witter Short-Term U.S. Treasury
Income Trust                             Trust
Dean Witter U.S. Government Money        Dean Witter Diversified Income Trust
Market Trust                             Dean Witter Limited Term Municipal
EQUITY FUNDS                             Trust
Dean Witter American Value Fund          Dean Witter Short-Term Bond Fund
Dean Witter Natural Resource             Dean Witter National Municipal Trust
Development Securities Inc.              Dean Witter High Income Securities
Dean Witter Dividend Growth Securities   Dean Witter Balanced Income Fund
Inc.                                     Dean Witter Hawaii Municipal Trust
Dean Witter Developing Growth            Dean Witter Intermediate Term U.S.
Securities Trust                         Treasury Trust
Dean Witter World Wide Investment Trust  DEAN WITTER RETIREMENT SERIES
Dean Witter Value-Added Market Series    Liquid Asset Series
Dean Witter Utilities Fund               U.S. Government Money Market Series
Dean Witter Capital Growth Securities    U.S. Government Securities Series
Dean Witter European Growth Fund Inc.    Intermediate Income Securities Series
Dean Witter Precious Metals and          American Value Series
Minerals Trust                           Capital Growth Series
Dean Witter Pacific Growth Fund Inc.     Dividend Growth Series
Dean Witter Health Sciences Trust        Strategist Series
Dean Witter Global Dividend Growth       Utilities Series
Securities                               Value-Added Market Series
Dean Witter Global Utilities Fund        Global Equity Series
Dean Witter International SmallCap Fund  ASSET ALLOCATION FUNDS
Dean Witter Mid-Cap Growth Fund          Dean Witter Strategist Fund
Dean Witter Balanced Growth Fund         Dean Witter Global Asset Allocation
Dean Witter Capital Appreciation Fund    Fund
Dean Witter Information Fund             ACTIVE ASSETS ACCOUNT PROGRAM
Dean Witter Income Builder Fund          Active Assets Money Trust
Dean Witter Japan Fund                   Active Assets Tax-Free Trust
Dean Witter Special Value Fund           Active Assets California Tax-Free Trust
Dean Witter Financial Services Trust     Active Assets Government Securities
FIXED-INCOME FUNDS                       Trust
Dean Witter High Yield Securities Inc.
Dean Witter Tax-Exempt Securities Trust
Dean Witter Federal Securities Trust
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 World Wide Income Trust
Dean Witter Intermediate Income
Securities
 
<PAGE>
 
   
Dean Witter New York
Municipal Money Market Trust
                                    Dean Witter
Two World Trade Center
New York, New York 10048
TRUSTEES                            New York
Michael Bozic                       Municipal
Charles A. Fiumefreddo              Money Market
Edwin J. Garn                       Trust
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
Katherine H. Stromberg
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.
                                    PROSPECTUS -- FEBRUARY 24, 1997
 
    
<PAGE>
STATEMENT OF ADDITIONAL
INFORMATION
                                                DEAN WITTER
FEBRUARY 24, 1997
                                                NEW YORK MUNICIPAL
                                                MONEY MARKET TRUST
- --------------------------------------------------------------------------------
 
    Dean  Witter  New  York Municipal  Money  Market  Trust (the  "Fund")  is an
open-end,  non-diversified  management   investment  company  whose   investment
objective  is to provide as high a level of daily income exempt from federal and
New York income tax as is consistent with stability of principal and  liquidity.
The  Fund seeks to achieve its objective  by investing primarily in high quality
tax-exempt securities  with short-term  maturities, including  Municipal  Bonds,
Municipal  Notes and Municipal Commercial  Paper. (See "Investment Practices and
Policies".)
 
    The Fund is authorized to reimburse specific expenses incurred in  promoting
the  distribution  of  the Fund's  shares  pursuant  to a  Plan  of Distribution
pursuant to Rule 12b-1 under the  Investment Company Act of 1940.  Reimbursement
may  in no event exceed an amount equal  to payments at the annual rate of 0.15%
of the average daily net assets of the Fund.
 
    A Prospectus for the Fund, dated February 24, 1997, which provides the basic
information you  should know  before  investing in  the  Fund, may  be  obtained
without charge by request of the Fund at its address or at the telephone numbers
listed  below. This Statement of  Additional Information 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 New York Municipal Money Market Trust
Two World Trade Center
New York, New York 10048
(800) 869-NEWS (toll-free) or
(212) 392-2550
<PAGE>
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                                                           <C>
The Fund and its Management.................................................     3
 
Trustees and Officers.......................................................     6
 
Investment Practices and Policies...........................................    12
 
Investment Restrictions.....................................................    16
 
Portfolio Transactions and Brokerage........................................    18
 
Purchase of Fund Shares.....................................................    24
 
How Net Asset Value Is Determined...........................................    31
 
Redemption of Fund Shares...................................................    33
 
Dividends, Distributions and Taxes..........................................    34
 
Description of Shares.......................................................    37
 
Custodian and Transfer Agent................................................    37
 
Independent Accountants.....................................................    38
 
Reports to Shareholders.....................................................    38
 
Legal Counsel...............................................................    38
 
Experts.....................................................................    38
 
Registration Statement......................................................    38
 
Financial Statements........................................................    38
 
Appendix....................................................................    39
</TABLE>
 
                                       2
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
THE FUND
 
    The  Fund is a Trust of the type commonly known as a "Massachusetts business
trust" and was organized under the laws of the Commonwealth of Massachusetts  on
December  28, 1989.  On February 19,  1993, the  Fund's name was  changed to its
current name Dean  Witter New York  Money Market Trust.  The Trust was  formerly
known as Dean Witter/Sears New York Municipal Money Market Trust.
 
    As  of December 31, 1996, no shareholder was known to own beneficially or of
record as much as 5%  of the outstanding shares of  the Fund. The percentage  of
ownership of shares of the Fund changes from time to time depending on purchases
and redemptions by shareholders and the total number of shares outstanding.
 
THE INVESTMENT MANAGER
 
    Dean  Witter InterCapital Inc. ("InterCapital" or the "Investment Manager"),
a Delaware corporation, 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 is
conducted by  or  under  the direction  of  officers  of the  Fund  and  of  the
Investment  Manager, subject  to review  of investments  by the  Fund's Board of
Trustees. Information as to these Trustees  and officers is contained under  the
caption "Trustees and Officers."
 
    The  Investment Manager 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 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 California  Tax-Free Daily
Income 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,  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,
Dean  Witter  Utilities   Fund,  Dean  Witter   Strategist  Fund,  Dean   Witter
Intermediate Income Securities, Dean Witter World Wide Income Trust, Dean Witter
Capital  Growth Securities, Dean  Witter European Growth  Fund Inc., Dean Witter
Precious Metals and Minerals Trust, Dean  Witter Pacific Growth Fund Inc.,  Dean
Witter  Global Short-Term  Income Fund  Inc., Dean  Witter Multi-State Municipal
Series Trust,  Dean Witter  Premier Income  Trust, Dean  Witter Short-Term  U.S.
Treasury  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  Limited Term  Municipal Trust,  Dean Witter Short-Term
Bond Fund,  InterCapital  Insured  Municipal  Securities,  InterCapital  Insured
California  Municipal Securities, Dean Witter Global Utilities Fund, Dean Witter
National Municipal  Trust,  Dean  Witter High  Income  Securities,  Dean  Witter
International SmallCap 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
 
                                       3
<PAGE>
Witter  Capital  Appreciation Fund,  Dean Witter  Information 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, Active Assets Money Trust, Active Assets Tax-Free Trust,  Active
Assets  California Tax-Free Trust and Active Assets Government Securities Trust.
The Investment Manager also serves  as administrator to 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. 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 Markets  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)  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.
 
    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 certain legal services as the Fund may
reasonably  require in the conduct of its business, including the preparation of
prospectuses, statements of additional information, proxy statements and reports
required to  be filed  with  federal and  state securities  commissions  (except
insofar  as  the  participation  or assistance  of  independent  accountants and
attorneys is, in the opinion of the Investment Manager, necessary or desirable).
In addition,  the  Investment  Manager  pays  the  salaries  of  all  personnel,
including officers of the Fund, who are employees of the Investment Manager. The
Investment  Manager also bears the cost of telephone service, heat, light, power
and other utilities provided to the Fund and the cost of printing (in excess  of
costs  borne by the Fund) and  distributing prospectuses and supplements thereto
of the Fund used for sales purposes.
 
    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 Management 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  "Purchase of Fund Shares") will  be
paid  by the Fund. The  expenses borne by the Fund  include, but are not limited
to: the distribution fee under the Plan pursuant to Rule 12b-1 (See "Purchase of
Fund Shares"); charges and expenses of any registrar, custodian, stock  transfer
and  dividend  disbursing  agent; brokerage  commissions;  taxes;  engraving and
printing of share certificates;  registration costs of the  Fund and its  shares
under  federal  and state  securities laws;  the cost  and expense  of printing,
including  typesetting,  and   distributing  Prospectuses   and  Statements   of
Additional Information of the
 
                                       4
<PAGE>
Fund  and  supplements  thereto  to the  Fund's  shareholders;  all  expenses of
shareholders' and trustees' meetings and  of preparing, printing and mailing  of
proxy  statements  and  reports to  shareholders;  fees and  travel  expenses of
Trustees or members of any advisory board or committee who are not employees  of
the Investment Manager or any corporate affiliate of the Investment Manager; all
expenses incident to any dividend, withdrawal or redemption options; charges and
expenses  of any outside service used for pricing of the Fund's shares; fees and
expenses of  legal  counsel, including  counsel  to  the Trustees  who  are  not
interested  persons  of the  Fund or  of the  Investment Manager  (not including
compensation or  expenses  of attorneys  who  are employees  of  the  Investment
Manager)  and independent accountants; membership dues of industry associations;
interest  on  Fund  borrowings;  postage;  insurance  premiums  on  property  or
personnel  (including  officers and  Trustees) of  the Fund  which inure  to its
benefit; extraordinary expenses (including, but not limited to, legal claims and
liabilities and litigation costs and any indemnification relating thereto);  and
all other costs of the Fund's operation.
 
    As  full compensation for the services  and facilities furnished to the Fund
and expenses of the Fund  assumed by the Investment  Manager, the Fund pays  the
Investment  Manager  monthly  compensation  calculated  daily  by  applying  the
following annual rates to the net assets of the Fund, determined as of the close
of business on every business day: 0.50% 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
$1.5  billion; 0.325%  of the  portion of  the daily  net assets  exceeding $1.5
billion but not  exceeding $2 billion;  0.30% of  the portion of  the daily  net
assets  exceeding  $2 billion  but  not exceeding  $2.5  billion; 0.275%  of the
portion of the  daily net  assets exceeding $2.5  billion but  not exceeding  $3
billion;  and 0.25% of the portion of the daily net assets exceeding $3 billion.
For the fiscal years ended December 31, 1994, December 31, 1995 and December 31,
1996, the Fund accrued to the Investment Manager total compensation of $216,727,
$218,571 and $212,463, respectively.
 
    The Agreement  provides that  in  the absence  of willful  misfeasance,  bad
faith, gross negligence or reckless disregard of its obligations thereunder, the
Investment Manager is not liable to the Fund or any of its investors for any act
or omission by the Investment Manager or for any losses sustained by the Fund or
its  investors. The  Agreement in no  way restricts the  Investment Manager from
acting as investment manager or adviser to others.
 
    The Agreement was initially  approved by the Trustees  on October 22,  1992,
and by the shareholders of the Fund at a Special Meeting of Shareholders held on
January 12, 1993. The Agreement is substantially identical to a prior investment
management  agreement which was  initially approved by  the Trustees on February
15, 1990, by DWR as  the then sole shareholder on  February 16, 1990 and by  the
Shareholders at a Special Meeting of Shareholders held on June 20, 1991.
 
    The  Agreement took  effect on  June 30, 1993,  upon the  spin-off by Sears,
Roebuck and Co. of its remaining shares of DWDC. 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,  1994,
and  will remain 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 Trustees of
the Fund  who are  not parties  to  the Agreement  as "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.
 
                                       5
<PAGE>
    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 InterCapital 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.
 
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 OCCUPATION 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
c/o Levitz Furniture Corporation                        the  Dean  Witter  Funds;  formerly  President  and  Chief
6111 Broken Sound Parkway, N.W.                         Executive  Officer  of   Hills  Department  Stores   (May,
Boca Raton, Florida                                     1991-July,   1995);  formerly  variously  Chairman,  Chief
                                                        Executive Officer, President  and Chief Operating  Officer
                                                        (1987-1991)  of  the  Sears  Merchandise  Group  of Sears,
                                                        Roebuck and Co.; Director of Eaglemark Financial Services,
                                                        Inc., the United Negro College Fund and Weirton Steel Cor-
                                                        poration.
 
Charles A. Fiumefreddo* (63)                            Chairman,  Chief   Executive  Officer   and  Director   of
Chairman of the Board,                                  InterCapital,   Distributors  and   DWSC;  Executive  Vice
President, Chief Executive Officer                      President and  Director of  DWR;  Chairman of  the  Board,
 and Trustee                                            Director or Trustee, President and Chief Executive Officer
Two World Trade Center                                  of  the  Dean  Witter  Funds;  Chairman,  Chief  Executive
New York, New York                                      Officer and  Trustee of  the  TCW/DW Funds;  Chairman  and
                                                        Director  of  Dean Witter  Trust Company;  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
Trustee                                                 United  States Senator (R-Utah)  (1974-1992) and Chairman,
c/o Huntsman Chemical Corporation                       Senate Banking  Committee (1980-1986);  formerly Mayor  of
500 Huntswan Way                                        Salt  Lake  City,  Utah  (1971-1974);  formerly Astronaut,
Salt Lake City, Utah                                    Space  Shuttle   Discovery  (April   12-19,  1985);   Vice
                                                        Chairman,  Huntsman  Chemical Corporation  (since January,
                                                        1993); Director of  Franklin Quest  (time management  sys-
                                                        tems)  and John Alden Financial Corp.; Member of the board
                                                        of various civic and charitable organizations.
</TABLE>
 
                                       6
<PAGE>
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
John R. Haire (72)                                      Chairman of  the  Audit  Committee  and  Chairman  of  the
Trustee                                                 Committee  of  the Independent  Directors or  Trustees and
Two World Trade Center                                  Director or Trustee of the Dean Witter Funds; Chairman  of
New York, New York                                      the  Audit Committee 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).
 
Dr. Manuel H. Johnson (48)                              Senior  Partner,  Johnson  Smick  International,  Inc.,  a
Trustee                                                 consulting  firm;  Koch  Professor  of  International Eco-
c/o Johnson Smick International, Inc.                   nomics and  Director  of  the  Center  for  Global  Market
1133 Connecticut Avenue, N.W.                           Studies at George Mason University; Director of Trustee of
Washington, DC                                          the  Dean  Witter  Funds;  Trustee  of  the  TCW/DW Funds;
                                                        Director of NASDAQ (since  June, 1995); Co-Chairman and  a
                                                        founder   of  the   Group  of  Seven   Council  (G7C),  an
                                                        international economic commission;  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,   L.P.,  a   private
Trustee                                                 investment  partnership; Director  or Trustee  of the Dean
c/o Triumph Capital, L.P.                               Witter Funds; Trustee of  the TCW/DW Funds; formerly  Vice
237 Park Avenue                                         President,   Bankers   Trust   Company   and   BT  Capital
New York, New York                                      Corporation  (1984-1988);  Director  of  various  business
                                                        organizations.
 
Philip J. Purcell* (53)                                 Chairman  of the  Board of  Directors and  Chief Executive
Trustee                                                 Officer of  DWDC,  DWR  and Novus  Credit  Services  Inc.;
Two World Trade Center                                  Director  of InterCapital, DWSC and Distributors; Director
New York, New York                                      or Trustee  of  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;
Trustee                                                 Trustee  of  the  TCW/DW   Funds;  Director  of   Citizens
c/o Gordon Altman Butowsky Weitzen                      Utilities  Company; formerly Executive  Vice President and
 Shalov & Wein                                          Chief Investment  Officer of  the Home  Insurance  Company
Counsel to the Independent Trustees                     (August,  1991-September,  1995);  formerly  Chairman  and
114 West 47th Street                                    Chief Investment  Officer of  Axe-Houghton Management  and
New York, New York                                      the Axe-Houghton Funds (1983-1991).
</TABLE>
 
                                       7
<PAGE>
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Barry Fink (42)                                         First  Vice President (since June, 1993) and Secretary and
Vice President, Secretary and                           General Counsel (since February, 1997) of InterCapital and
General Counsel                                         DWSC;  First  Vice  President,  Assistant  Secretary   and
Two World Trade Center                                  Assistant General Counsel of Distributors (since February,
New York, New York                                      1997);  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  Vice   President,  Assistant   Secretary   and
                                                        Assistant  General  Counsel of  InterCapital and  DWSC and
                                                        Assistant Secretary  of  the  Dean Witter  Funds  and  the
                                                        TCW/DW Funds.
 
Katherine H. Stromberg (48)                             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  Inter-
Treasurer                                               Capital  and DWSC; Treasurer of  the Dean Witter Funds and
Two World Trade Center                                  the TCW/DW Funds.
New York, New York
<FN>
- ------------------------
*Denotes Trustees who are  "Interested persons" of the  Fund, as defined in  the
 Act.
</TABLE>
 
   
    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,  Joseph J.  McAlinden,  Executive Vice  President  and Chief
Investment Officer of InterCapital  and Director of  DWTC, Robert S.  Giambrone,
Senior  Vice President of InterCapital, DWSC,  Distributor and DTWC and Director
of DWTC, Peter M. Avelar,  Jonathan R. Page and  James F. Willison, Senior  Vice
Presidents  of  InterCapital, and  Joseph R.  Arcieri and  Gerard J.  Lian, Vice
Presidents of  InterCapital,  are Vice  Presidents  of the  Fund.  In  addition,
Marilyn  K.  Cranney,  First Vice  President  and Assistant  General  Counsel of
InterCapital and DWSC, and Lou Anne  D. McInnis and Ruth Rossi, Vice  Presidents
and  Assistant General Counsels of InterCapital  and DWSC, and Frank Bruttomesso
and Carsten Otto, Staff Attorneys  with InterCapital, 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 83 Dean Witter Funds, comprised of
126 portfolios. As  of January 31,  1997, the  Dean Witter Funds  had total  net
assets of approximately $83.6 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'
 
                                       8
<PAGE>
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, 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,  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
 
                                       9
<PAGE>
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>
 
    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.
 
                                       10
<PAGE>
           CASH COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS
 
<TABLE>
<CAPTION>
                                                                   FOR SERVICE AS    FOR SERVICE
                                                                    CHAIRMAN OF          AS          TOTAL CASH
                                                                   COMMITTEES OF     CHAIRMAN OF    COMPENSATION
                               FOR SERVICE                          INDEPENDENT     COMMITTEES OF   FOR SERVICES
                              AS DIRECTOR OR                         DIRECTORS/      INDEPENDENT         TO
                               TRUSTEE AND       FOR SERVICE AS     TRUSTEES AND    TRUSTEES AND       82 DEAN
                             COMMITTEE MEMBER     TRUSTEE AND          AUDIT            AUDIT          WITTER
                                OF 82 DEAN      COMMITTEE MEMBER   COMMITTEES OF    COMMITTEES OF     FUNDS AND
NAME OF                           WITTER          OF 14 TCW/DW     82 DEAN WITTER     14 TCW/DW       14 TCW/DW
INDEPENDENT TRUSTEE               FUNDS              FUNDS             FUNDS            FUNDS           FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
Michael Bozic..............      $138,850           --                 --               --            $138,850
<S>                          <C>                <C>                <C>              <C>             <C>
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.
 
    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.
 
                                       11
<PAGE>
          RETIREMENT BENEFITS FROM THE FUND AND ALL DEAN WITTER FUNDS
 
<TABLE>
<CAPTION>
                                                                              RETIREMENT BENEFITS
                                              FOR ALL ADOPTING FUNDS                                   ESTIMATED ANNUAL
                                      --------------------------------------  ACCRUED AS EXPENSES          BENEFITS
                                           ESTIMATED                                                  UPON RETIREMENT(2)
                                        CREDITED 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            (365 (3)    46,952     2,296     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>
 
- ------------------------
(1)  An Eligible Trustee may elect  alternate payments of his or her  retirement
    benefits  based upon the  combined life expectancy  of such Eligible Trustee
    and his or her spouse on the date of such Eligible Trustee's retirement. The
    amount estimated to be payable under  this method, through the remainder  of
    the  later of  the lives of  such Eligible  Trustee and spouse,  will be the
    actuarial equivalent  of  the Regular  Benefit.  In addition,  the  Eligible
    Trustee  may elect that the surviving  spouse's periodic payment of benefits
    will be equal  to either 50%  or 100%  of the previous  periodic amount,  an
    election  that, respectively,  increases or decreases  the previous periodic
    amount so that the  resulting payments will be  the actuarial equivalent  of
    the Regular Benefit.
(2)   Based on  current levels of  compensation. Amount of  annual benefits also
    varies depending on the Trustee's elections described in Footnote (1) above.
(3)  This number  reflects the effect  of the extension of  Mr. Haire's term  as
    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
 
    TAXABLE  SECURITIES.  As discussed in the Prospectus, the Fund may invest up
to 20% of its  total assets in taxable  money market instruments and  repurchase
agreements.  Investments in taxable money  market instruments would generally be
made under  any  one of  the  following circumstances:  (a)  pending  investment
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.  Only those  non-New York
tax-exempt securities  which  satisfy the  standards  established for  New  York
tax-exempt  securities may be purchased by the  Fund. The types of taxable money
market instruments in  which the Fund  may 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
Investors Services, Inc.  ("Moody's") or  A-1 by Standard  & Poor's  Corporation
("S&P");  (iii)  certificates of  deposit of  domestic banks  with assets  of $1
billion or  more;  and (iv)  repurchase  agreements with  respect  to  portfolio
securities.  In addition, the Fund  may temporarily invest more  than 20% of its
total assets  in taxable  money  market instruments  to maintain  a  "defensive"
posture when, in the opinion of the Investment Manager, it is advisable to do so
because of market conditions.
 
    TAX-EXEMPT  SECURITIES.  As discussed in the Prospectus, at least 80% of the
Fund's total assets will be invested  in Municipal Obligations and at least  65%
of  the Fund's total assets  will be invested in  New York Municipal Obligations
(New York  Municipal Bonds,  New York  Municipal Notes  and New  York  Municipal
Commercial  Paper). Such New York Municipal Obligations are exempt from federal,
New York State and New  York City income tax except  to those investors who  are
subject  to the alternative minimum  tax. Up to 35%  of the Trust's total assets
may  be  invested  in  Municipal  Obligations  other  than  New  York  Municipal
Obligations.  Such Municipal Obligations are exempt from federal income tax (but
not New York State and New York City income taxes) except to those investors who
are subject to the alternative
 
                                       12
<PAGE>
minimum  tax. The Trust may temporarily invest more than 35% of its total assets
in non-New York Municipal Obligations in  order to maintain a defensive  posture
when,  in the opinion of the  Investment Manager, prevailing market or financial
conditions so warrant. In regard to the Moody's and S&P ratings discussed in the
Prospectus, it should  be noted  that the ratings  represent the  organizations'
opinions  as to the quality  of the securities which  they undertake to rate and
the ratings are general and not absolute standards of quality. For a description
of Municipal  Bond, Municipal  Note and  Municipal Commercial  Paper ratings  by
Moody's and S&P, see the Appendix to this Statement of Additional Information.
 
    The  percentage and rating limitations discussed above and 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 total assets will  not require elimination of
any security from the Fund's portfolio.
 
    The payment  of  principal and  interest  by issuers  of  certain  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 issue of one year or more, and the interest from
which is, in the  opinion of bond  counsel, exempt from  federal income tax.  In
addition  to these requirements, the interest from New York Municipal Bonds must
be, in the opinion of  bond counsel, exempt from  New York personal 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. In addition to those requirements,  the
interest  from New York Municipal Notes must be, in the opinion of bond counsel,
exempt from New York personal 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.
 
    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. In addition to those requirements,  the
interest from New York Commercial Paper must be, in the opinion of bond counsel,
exempt  from New York personal income tax. It 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  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.
 
    The two principal classifications of  Municipal Bonds, Notes and  Commercial
Paper  are "general obligation" and "revenue"  bonds, notes 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
 
                                       13
<PAGE>
of principal  and  interest.  Issuers  of general  obligation  bonds,  notes  or
commercial  paper  include  a  state,  its  counties,  cities,  towns  and other
governmental 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  with
respect  to  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.
 
    Issuers of these obligations  are subject to  the 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.
 
PORTFOLIO MANAGEMENT
 
    VARIABLE RATE AND FLOATING RATE OBLIGATIONS.   As stated in the  Prospectus,
the  Fund  may  invest  in  Municipal  Bonds  and  Municipal  Notes  ("Municipal
Obligations") of the type  called variable rate  and floating rate  obligations.
The  interest rate payable on  a variable rate obligation  is adjusted either at
predesignated periodic intervals  and, on a  floating rate obligation,  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. As a result, the purchase of variable rate and floating
rate obligations should enhance the ability of the Fund to maintain a stable net
asset  value per  share (see "How  Net Asset  Value is Determined")  and to sell
obligations prior  to  maturity  at  a price  that  is  approximately  the  full
principal  amount  of the  obligations.  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 an obligation
prior to maturity, is enhanced. The payment of principal and interest by issuers
of certain 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  an
obligation meets the Fund's investment quality requirements.
 
    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
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 liquid assets such as cash, U.S. government securities
or  other appropriate 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
 
                                       14
<PAGE>
purchase of Municipal Obligations  on a when-issued  or delayed delivery  basis.
During  the  fiscal year  ended  December 31,  1996,  the Fund's  investments in
when-issued and delayed delivery securities did not exceed 5% of its net assets.
 
    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, which is usually not  more than seven days from
the date of purchase. The Fund  will accrue interest from the institution  until
the  time when the repurchase  is to occur. Although such  date is deemed by the
Fund to  be the  maturity date  of  a repurchase  agreement, the  maturities  of
securities  subject to repurchase  agreements are not subject  to any limits and
may exceed one year.
 
    While repurchase agreements involve certain risks not associated with direct
investments in debt securities, the Fund follows procedures designed to minimize
such risks. These procedures include effecting repurchase transactions only with
large, well  capitalized  and  well established  financial  institutions,  whose
financial condition will be continually monitored. In addition, the value of the
collateral  underlying the repurchase agreement will always be at least equal to
the resale price, which consists of the purchase price paid to the seller of the
securities plus  the accrued  resale  premium which  is  defined as  the  amount
specified  in  the  repurchase  agreement  or  the  daily  amortization  of  the
difference between the  purchase price  and the  resale price  specified in  the
repurchase  agreement. Such collateral will  consist entirely of securities that
are direct obligations  of, or  that are fully  guaranteed as  to principal  and
interest  by, the  United States or  any agency thereof,  and/or certificates of
deposit, bankers' acceptances  which are  eligible for acceptance  by a  Federal
Reserve Bank, and, if the seller is a bank, mortgage related securities (as such
term  is defined  in section  3(a)(41) of the  Securities Exchange  Act of 1934)
that, at the time  the repurchase agreement  is entered into,  are rated in  the
highest  rating category by  the Requisite NRSROs.  Additionally, the collateral
must qualify  the  repurchase agreement  for  preferential treatment  under  the
Federal  Deposit Insurance Act or the Federal Bankruptcy Code. In the event of a
default or bankruptcy by a selling financial institution, the Fund will seek  to
liquidate  such  collateral.  However,  the  exercise  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  asset held by the  Fund, amount to more than  10% of its total 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. During the fiscal year ended December 31, 1996, the Fund did not  enter
into any repurchase agreements.
 
    PUT  OPTIONS.  The Fund  may purchase securities together  with the right to
resell them to the seller  at an agreed upon price  or yield within a  specified
period  prior to the maturity date of such securities. Such a right to resell is
commonly known as  a "put,"  and the  aggregate price  which the  Fund pays  for
securities  with puts may be higher than the price which otherwise would be paid
for the securities. Consistent with the Fund's investment objectives and subject
to the  supervision  of the  Board  of Trustees,  the  primary purpose  of  this
practice  is to permit the Fund to be fully invested in securities, the interest
on which  is  exempt  from Federal  and  New  York personal  income  tax,  while
preserving  the necessary flexibility and liquidity  to purchase securities on a
when-issued basis, to  meet unusually  large redemptions  and to  purchase at  a
later date securities other than those subject to the put. The Fund's policy is,
generally,  to exercise  the puts  on their  expiration date,  when the exercise
price is higher than the current  market price for the related securities.  Puts
may  be exercised prior to  the expiration date in  order to fund obligations to
purchase other securities or to meet redemption requests. These obligations  may
arise during periods in which proceeds from sales of Fund shares and from recent
sales of portfolio securities
 
                                       15
<PAGE>
are  insufficient  to meet  such  obligations or  when  the funds  available are
otherwise allocated for investment. In addition, puts may be exercised prior  to
their expiration date in the event the Investment Manager revises its evaluation
of the creditworthiness of the issuer of the underlying security. In determining
whether  to exercise puts prior to their  expiration date and in selecting which
puts to exercise in such circumstances, the Investment Manager considers,  among
other  things, the amount of cash available to the Fund, the expiration dates of
the available puts, any future commitments for securities purchases, the  yield,
quality  and maturity dates of the underlying securities, alternative investment
opportunities and the desirability of retaining the underlying securities in the
Fund's portfolio.
 
    The Fund values securities which are subject to puts at their amortized cost
and values the put, apart from the security, at zero. Thus, the cost of the  put
will  be carried  on the  Fund's books as  an unrealized  loss from  the date of
acquisition and will  be reflected  in realized  gain or  loss when  the put  is
exercised  or expires. Since the value of the put is dependent on the ability of
the put writer to  meet its obligation  to repurchase, the  Fund's policy is  to
enter  into  put transactions  only with  municipal  securities dealers  who are
approved by the Fund's Board  of Trustees. Each dealer  will be approved on  its
own  merits and it is  the Fund's general policy  to enter into put transactions
only with those dealers which are determined to present minimal credit risks. In
connection with such  determination, the  Board of Trustees  will review,  among
other  things, the ratings, if available, of  equity and debt securities of such
municipal securities  dealers, their  reputations  in the  municipal  securities
markets,  the net  worth of  such dealers  and their  efficiency in consummating
transactions. Bank  dealers normally  will  be members  of the  Federal  Reserve
System,  and  other  dealers will  be  members  of the  National  Association of
Securities Dealers, Inc. or members of a national securities exchange. The Board
has directed the Investment Manager not to enter into put transactions with, and
to exercise outstanding puts of, any  municipal securities dealer which, in  the
judgment  of the  Investment Manager,  ceases at any  time to  present a minimal
credit risk. In  the event that  a dealer  should default on  its obligation  to
repurchase  an underlying security, the Fund is unable to predict whether all or
any portion of  any loss  sustained could  be subsequently  recovered from  such
dealer. The Fund may not invest more than 10% of its total assets in puts at any
given  time. During the  fiscal year ended  December 31, 1996,  the Fund did not
purchase any put options.
 
    It is the position  of the staff of  the Securities and Exchange  Commission
that  certain provisions  of the  Act may  be deemed  to prohibit  the Fund from
purchasing puts from broker-dealers  without an exemptive  order. Until such  an
order is obtained, the Fund will purchase puts only from commercial banks. There
is  no  assurance that  such an  order, if  applied for,  will be  obtained. The
duration of  puts, which  will not  exceed  60 days,  will not  be a  factor  in
determining the weighted average maturity of the Fund's portfolio securities.
 
    In  Revenue Ruling 82-144,  the Internal Revenue  Service stated that, under
certain circumstances, a purchaser of  tax-exempt obligations which are  subject
to  puts will be considered the owner  of the obligations for Federal income tax
purposes. In connection therewith, the Fund  has received an opinion of  counsel
to  the effect that  interest on Municipal  Obligations subject to  puts will be
tax-exempt to the Fund.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    In addition to the investment restrictions enumerated in the Prospectus, the
investment  restrictions  listed  below  have  been  adopted  by  the  Fund   as
fundamental   policies,  except  as  otherwise   indicated.  Under  the  Act,  a
fundamental policy may  not be  changed without  the vote  of the  holders of  a
majority  of the outstanding  voting securities of  the Fund, as  defined in the
Act. Such a majority is defined in the Act  as the lesser of (a) 67% or more  of
the  shares present at a Meeting of Shareholders  of the Fund, if the holders of
more than 50% of the outstanding shares  of the Fund are present or  represented
by  proxy at the meeting, or (b) more  than 50% of the outstanding shares of the
Fund. For  purposes of  the  following restrictions  and  those recited  in  the
Prospectus:  (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
 
                                       16
<PAGE>
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 a  security
issued  by  the guarantor  if  the value  of  all securities  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
total or  net assets  does not  require  elimination of  any security  from  the
portfolio.
 
    The  term "bank obligations"  as referred to in  Investment Restriction 3 in
the Prospectus  refers  to  short-term obligations  (including  certificates  of
deposit  and bankers'  acceptances) of banks  subject to regulation  by the U.S.
Government and  having total  assets  of $1  billion  or more,  and  instruments
secured  by such obligations,  not including obligations  of foreign branches of
domestic banks.
 
    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  of  the Fund  or any  officer  or director  of  the
    Investment Manager 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 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 or commodity futures contracts.
 
         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
    that it may acquire rights to resell Municipal Obligations at an agreed upon
    price and at or within an agreed upon time.
 
         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 borrowings effected within the  limitations set forth in  restriction
    (8). To meet the requirements of regulations in certain states, the Fund, as
    a matter of operating policy but not as a fundamental policy, will limit any
    pledge  of its assets to 10% of its net assets so long as shares of the Fund
    are being sold in those states.
 
        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)
    purchasing any securities on a when-issued or delayed delivery basis; or (b)
    borrowing money in accordance with restrictions described above.
 
        11. Make short sales of securities.
 
        12. Purchase securities on margin,  except for such short-term loans  as
    are necessary for the clearance of purchases of portfolio securities.
 
        13. 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.
 
        14. Invest for the  purpose of exercising control  or management of  any
    other issuer.
 
                                       17
<PAGE>
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 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  accounts
without a stated commission, although the price of the security usually includes
a  profit to the dealer. 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,  December 31, 1995 and December 31,  1996,
the Fund paid no such brokerage commissions or concessions.
 
    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 for  its
portfolio,  is  that  primary  consideration  be  given  to  obtaining  the most
favorable  prices  and  efficient  execution  of  transactions.  In  seeking  to
implement  the Fund's policies, the Investment Manager effects transactions with
those brokers and dealers who the  Investment Manager believes provide the  most
favorable  prices  and are  capable of  providing  efficient executions.  If the
Investment Manager believes such price  and executions are obtainable from  more
than  one  broker or  dealer,  it may  give  consideration to  placing portfolio
transactions with those brokers and dealers who also furnish research and  other
services  to the Fund or the Investment  Manager. Such services may include, but
are not limited  to, any one  or more of  the following: information  as to  the
availability  of  securities  for  purchase  or  sale;  statistical  or  factual
information or opinions pertaining to investment; wire services; and  appraisals
or evaluations of portfolio securities.
 
    The information and services received by the Investment Manager from brokers
and  dealers may be  of benefit to  the Investment Manager  in the management of
accounts of some of its other clients and may not in all cases benefit the  Fund
directly.  While  the receipt  of  such information  and  services is  useful in
varying degrees and would  generally reduce the amount  of research or  services
otherwise  performed by the Investment Manager  and thereby reduce its expenses,
it is of indeterminable value and the Fund does not reduce the management fee it
pays to the Investment  Manager 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.
 
                                       18
<PAGE>
    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 (as
defined in the Act),  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.  During the fiscal years ended  December
31, 1994, 1995, and 1996, the Fund paid no brokerage commissions to DWR.
 
    Subject  to  the  principle  of  obtaining  best  price  and  execution, the
Investment Manager may consider a broker-dealer's sales of shares of the Fund as
a factor  in selecting  from  among those  broker-dealers qualified  to  provide
comparable  prices and execution on the  Fund's portfolio transactions. The Fund
does not, however, require a broker-dealer to  sell shares of the Fund in  order
for  it to be considered  to execute portfolio transactions,  and will not enter
into any  arrangement whereby  a specific  amount or  percentage of  the  Fund's
transactions  will be  directed to a  broker which  sells shares of  the Fund to
customers. The  Board  of  Trustees reviews,  periodically,  the  allocation  of
brokerage orders to monitor the operation of these policies.
 
    Portfolio  turnover  rate is  defined  as the  lesser  of the  value  of the
securities  purchased  or  securities  sold,  excluding  all  securities   whose
maturities  at time of acquisition were one year or less, divided by the average
monthly value  of such  securities owned  during the  year. Because  the  Fund's
portfolio  consists of municipal obligations maturing  within one year, the Fund
is unable to calculate its turnover rate as so defined. However, because of  the
short-term nature of the Fund's portfolio securities, it is anticipated that the
number  of  purchases  and  sales  of  maturities  of  such  securities  will be
substantial. Brokerage commissions  are not  normally charged  on purchases  and
sales  of short-term  municipal obligations,  but such  transactions may involve
transaction costs in the form of spreads between bid and asked prices.
 
SPECIAL CONSIDERATIONS RELATING TO NEW YORK TAX-EXEMPT SECURITIES
 
    During the mid-1970's, New York State  (the "State"), some of its  agencies,
instrumentalities  and  public  benefit  corporations  (the  "Authorities"), and
certain of its municipalities faced  serious financial difficulties. To  address
many  of these financial problems, the State developed various programs, many of
which  were  successful  in  ameliorating  the  financial  crisis.  Any  further
financial problems experienced by these Authorities or municipalities could have
a  direct adverse effect on the New York Municipal Obligations in which the Fund
invests.
 
NEW YORK CITY
 
    GENERAL.  The national economic downturn which began in July 1990  adversely
affected  the local  economy, which  had been  declining since  late 1989.  As a
result, New York City (the "City") experienced  job losses in 1990 and 1991  and
real Gross City Product (GCP) fell in those two years. For the 1992 fiscal year,
the  City closed a  projected budget gap of  $3.3 billion in  order to achieve a
balanced budget as required  by the laws  of the State.  Beginning in 1992,  the
improvement  in the  national economy helped  stabilize conditions  in the City.
Employment losses moderated toward year-end  and real GCP increased, boosted  by
strong  wage gains. After  noticeable improvements in  the City's economy during
calendar year  1994, economic  growth slowed  in 1995,  and the  City's  current
four-year  financial plan  assumes that  moderate economic  growth will continue
through the year 2000.
 
    For each of the 1981 through  1996 fiscal years, the City achieved  balanced
operating  results  as reported  in  accordance with  then  applicable generally
accepted  accounting  principles  ("GAAP").  The  City  was  required  to  close
substantial  budget gaps in recent years in order to maintain balanced operating
results.
 
                                       19
<PAGE>
    1997-2000 NEW  YORK CITY  FINANCIAL  PLAN.   The  Mayor is  responsible  for
preparing  the City's four-year financial  plan (the "1997-2000 Financial Plan",
the "Financial Plan" or "City Plan").  On November 14, 1996, the City  submitted
to the Control Board the Financial Plan for the 1997-2000 fiscal years, which is
a  modification to a financial  plan submitted to the  Control Board on June 21,
1996 (the "June Financial  Plan") and which  relates to the  City, the Board  of
Education ("BOE") and the City University of New York.
 
    The  June Financial  Plan set forth  proposed actions to  close a previously
projected gap of approximately $2.6 billion for the 1996 fiscal year,  including
(i)  agency actions totaling $1.2 billion;  (ii) a revised tax reduction program
which would increase projected tax revenues by $369 million due to the four year
extension of the 12.5%  personal income tax surcharge  and other actions;  (iii)
savings  resulting from cost containment in  entitlement programs to reduce City
expenditures and additional proposed State aid of $74 million; (iv) the  assumed
receipt of revenues relating to rent payments for the City's airports, which are
currently  the subject of a dispute with the  Port Authority of New York and New
Jersey (the "Port Authority"); (v) the sale of the City's television station for
$207 million; and (iv) pension cost savings totaling $134 million resulting from
a proposed increase in the earnings  assumption for pension assets from 8.5%  to
8.75%.
 
    The  1997-2000 Financial Plan published on November 14, 1996 reflects actual
receipts and  expenditures and  changes in  forecast revenues  and  expenditures
since  the June Financial  Plan. The 1997-2000  Financial Plan projects revenues
and expenditures for  1997 fiscal  year balanced  in accordance  with GAAP,  and
projects  gaps of $1.2 billion, $2.1 billion and $3.0 billion for the 1998, 1999
and 2000  fiscal years,  respectively.  Changes since  the June  Financial  Plan
include:  (i)  an  increase in  projected  tax  revenues of  $450  million, $120
million, $50  million  and  $45  million in  fiscal  years  1997  through  2000,
respectively;  (ii) a delay in  the assumed receipt of  $304 million relating to
projected rent payments for the City airports  from the 1997 fiscal year to  the
1998  and 1999 fiscal  years, and a  $34 million reduction  in assumed State and
Federal aid for the 1997 fiscal year; (iii) an approximate $200 million increase
in projected overtime and  other expenditures in each  of the fiscal years  1997
through  2000; (iv) a $70  million increase in expenditures  for BOE in the 1997
fiscal year for school text books; (v) a reduction in projected pension costs of
$34 million,  $50 million,  $49 million  and $47  million in  fiscal years  1997
through  2000, respectively;  and (vi)  additional agency  actions totaling $179
million, $386  million, $473  million  and $589  million  in fiscal  years  1997
through 2000, respectively, including personnel reductions through attrition and
early retirement.
 
    The  City depends  on the  State for State  aid both  to enable  the City to
balance its budget and to meet its cash requirements. There can be no  assurance
that  there  will  not be  reductions  in State  aid  to the  City  from amounts
currently projected or  that the State  budgets in future  fiscal years will  be
adopted  by the April  1 statutory deadline  and that such  reductions or delays
will not have adverse effects on the City's cash flow or expenditures.
 
    The City's  projections set  forth in  the City  Plan are  based on  various
assumptions and contingencies which are uncertain and which may not materialize.
Changes  in major assumptions  could significantly affect  the City's ability to
balance its budget as required by State law and to meet its annual cash flow and
financing  requirements.  Such  assumptions   and  contingencies  include:   the
condition  of the regional  and local economies,  the impact on  real estate tax
revenues of the real estate market, wage increases for City employees consistent
with those assumed  in the  Financial Plan,  employment growth,  the ability  to
implement  proposed  reductions  in  City  personnel  and  other  cost reduction
initiatives, which may require  in certain cases the  cooperation of the  City's
municipal  unions,  the  ability  of  the New  York  City  Health  and Hospitals
Corporations and BOE to take actions to offset reduced revenues, the ability  to
complete revenue generating transactions, provision of State and Federal aid and
mandate  relief and  the impact  on City revenues  of proposals  for Federal and
State welfare  reform and  any future  legislation affecting  Medicare or  other
entitlement.
 
    Implementation of the City Plan is also dependent upon the City's ability to
market  its securities  successfully in  the public  credit markets.  The City's
financing program for fiscal years 1997 through 2000
 
                                       20
<PAGE>
contemplates the issuance of $7.7 billion  of general obligation bonds and  $4.5
billion  of bonds  to be  issued by  the proposed  New York  City Infrastructure
Finance Authority ("IFA") primarily to  reconstruct and rehabilitate the  City's
infrastructure  and physical assets  and to make  other capital investments. The
creation of  the  IFA is  subject  to the  enactment  of State  legislation.  In
addition,  the City  issues revenue  and tax  anticipation notes  to finance its
seasonal working capital requirements. The success of projected public sales  of
City  bonds  and  notes and  IFA  Bonds  will be  subject  to  prevailing market
conditions, and no assurance can be given that such sales will be completed.  If
the  City were unable to sell its general obligation bonds and notes or bonds of
the proposed IFA, it would be  prevented from meeting its planned operating  and
capital expenditures.
 
    The  City Comptroller  and other agencies  and public  officials have issued
reports and  made  public  statements  which, among  other  things,  state  that
projected  revenues  may be  less and  future expenditures  may be  greater than
forecast in the  City Plan. It  is reasonable  to expect that  such reports  and
statements will continue to be issued and engender public comment.
 
    RATINGS.
 
    Moody's  has  rated the  City's general  obligation  bonds Baa1.  Standard &
Poor's has rated the bonds BBB+. Fitch  has rated the bonds A-. On February  28,
1996,  Fitch  placed  the City's  general  obligation bonds  on  FitchAlert with
negative implications. On  November 5,  1996, Fitch removed  the City's  general
obligation bonds from FitchAlert, although Fitch stated that the outlook remains
negative.  These  ratings do  not  reflect any  bond  insurance relating  to any
portion of the bonds.  The city expects that  ratings on the Financial  Guaranty
Insured  Bonds and the AMBAC Insured Bonds  will be received prior to January 7,
1997. The ratings on the Financial Guaranty Insured Bonds and the AMBAC  Insured
Bonds  will be based on the insurance polices to be issued by Financial Guaranty
and AMBAC  Indemnity,  respectively.  Bonds insured  to  maturity  by  Financial
Guaranty  are rated "AAA"  by Standard &  Poor's, "Aaa" by  Moody's and "AAA" by
Fitch. Bonds insured to maturity by AMBAC Indemnity are rated "AAA" by  Standard
&  Poor's, "Aaa" by  Moody's and "AAA"  by Fitch. Such  ratings reflect only the
views of Moody's, Standard & Poor's and Fitch, from which an explanation of  the
significance  of such ratings may  be obtained. There is  no assurance that such
ratings will continue  for any given  period of time  or that they  will not  be
revised downward or withdrawn entirely. Any such downward revision or withdrawal
could have an adverse effect on the market prices of the bonds.
 
    OUTSTANDING  INDEBTEDNESS.   As  of  September 30,  1996,  the City  and the
Municipal Assistance Corporation  for the  City of New  York had,  respectively,
$25.099 billion and $3.889 billion of outstanding net long-term debt.
 
    LITIGATION.   The  City is  a defendant  in lawsuits  pertaining to material
matters, including claims  asserted which are  incidental to performing  routine
governmental  and other functions. This litigation  includes, but is not limited
to, actions  commenced and  claims  asserted against  the  City arising  out  of
alleged  torts, alleged  breaches of  contracts, alleged  violations of  law and
condemnation proceedings. As of June 30, 1996 and 1995, claims in excess of $380
billion and $311 billion,  respectively, were outstanding  against the City  for
which  the City estimates its potential future  liability to be $2.8 billion and
$2.5 billion, respectively.
 
NEW YORK STATE
 
    RECENT DEVELOPMENTS.  The national economy has resumed a more robust rate of
growth after  a  "soft  landing"  in  1995, with  over  11  million  jobs  added
nationally  since early  1992. The  State economy  has continued  to expand, but
growth remains somewhat slower than in the nation. Although the State has  added
approximately  240,000 jobs since late 1992,  employment growth in the State has
been hindered during recent  years by significant cutbacks  in the computer  and
instrument  manufacturing, utility,  defense and  banking industries. Government
downsizing has also moderated these job gains.
 
    The 1996-97  New  York State  Financial  Plan  (the "State  Plan"  or  "July
Financial Plan") is based on the State's economy showing modest expansion during
the  first half of 1996,  but that some slowdown  is projected during the second
half of  the  year. Although  industries  that  export goods  and  services  are
 
                                       21
<PAGE>
expected  to continue to do well, growth  is expected to be slowed by government
cutbacks at all  levels and  by tight fiscal  constraints on  health and  social
services. On an average annual basis, employment growth in the State is expected
to  be up  slightly from the  1995 rate.  Personal income is  expected to record
moderate gains in 1996. Bonus payments  in the securities industry are  expected
to increase further from last year's record level.
 
    The  State  Plan is  based  upon forecasts  of  national and  State economic
activity developed  through  both internal  analysis  and review  of  State  and
national  economic  forecasts prepared  by  commercial forecasting  services and
other public and private forecasters. Economic forecasts have frequently  failed
to  predict accurately the timing  and magnitude of changes  in the national and
the State economies. Many uncertainties exist in forecasts of both the  national
and State economies, including consumer attitudes toward spending, the extent of
corporate  and governmental restructuring, federal fiscal and monetary policies,
the level of interest rates, and the condition of the world economy, which could
have an adverse effect on  the State. There can be  no assurance that the  State
economy  will not experience results  in the current fiscal  year that are worse
than predicted, with corresponding material  and adverse effects on the  State's
projections of receipts and disbursements.
 
    THE 1996-97 FISCAL YEAR.  The State's General Fund (the major operating fund
of the State) was projected in the State Plan to be balanced on a cash basis for
the  1996-97 fiscal  year. The  State Plan  projected General  Fund receipts and
transfers from other funds at $33.17  billion, an increase of $365 million  from
the  prior fiscal year, and disbursements and transfers to other funds at $33.12
billion, an  increase of  $444 million  from the  total disbursed  in the  prior
fiscal year.
 
    The State issued its first quarterly update to the State Plan (the "Mid-Year
Update")  on October 25, 1996. The Mid-Year Update projects a continued balanced
1996-97 State Financial Plan,  with a reserve for  contingencies in the  General
Fund  of $300 million. This reserve will be utilized to help offset a variety of
potential risks  and other  unexpected  contingencies that  the State  may  face
during  the balance  of the  1996-97 fiscal  year. The  Mid-Year Update reflects
revisions made to  estimates of both  receipts and disbursements  based on:  (1)
updated economic forecasts for both the nation and the State, (2) an analysis of
actual  receipts and  disbursements through the  first six months  of the fiscal
year and (3) an assessment of changing State program requirements.
 
    More specifically, based on the revised economic outlook and actual receipts
for the first  six months of  1996-97, projected General  Fund receipts for  the
1996-97 State fiscal year have increased by $420 million. Most of this projected
increase  is  in the  yield  of the  personal  income tax  ($241  million), with
additional increases now expected in business taxes ($124 million) and other tax
receipts ($49 million). Projected collections from user taxes and fees have been
revised downward  slightly  ($5  million).  Revisions were  also  made  to  both
miscellaneous  receipts  and  in  transfers from  other  funds  (an  $11 million
combined projected increase).
 
    Disbursements through the  first six  months of  the fiscal  year were  $415
million  less than projected, primarily because of delays in processing payments
following delayed enactment  of the State  budget. As a  result, no savings  are
included  in  the  Mid-Year  Update  from  this  slower-than-expected  spending.
Projections of 1996-97 General Fund disbursements are increased by $120 million,
since increased General Fund disbursements for education are required to replace
a projected decrease in lottery receipts.
 
    Revisions to  all governmental  funds receipts  and disbursements  estimates
primarily  reflect changes to the General Fund and transfers between fund types.
The projected closing fund balance for  all governmental funds is $623  million,
unchanged from the projection in the State Plan. The annual increase in spending
for  all  governmental  funds  remains  approximately  4  percent,  the  same as
projected in the State Plan.
 
    Uncertainties with regard to the economy, as well as the outcome of  certain
litigation  now pending against the State,  could produce adverse effects on the
projections of receipts and disbursements  in the Mid-Year Update. For  example,
changes   to   current  levels   of  interest   rates  or   deteriorating  world
eco-
 
                                       22
<PAGE>
nomic conditions could have an adverse  effect on the State economy and  produce
results  in the current fiscal year that are worse than predicted. Similarly, an
adverse judgment in  legal proceedings  against the State  could exceed  amounts
reserved in the 1996-97 Financial Plan for payment of such judgments and produce
additional unbudgeted costs to the State.
 
    NEW  YORK LOCAL GOVERNMENT  ASSISTANCE CORPORATION.   In 1990, as  part of a
state fiscal reform program, legislation was enacted creating the New York  Loan
Government   Assistance  Corporation  ("LGAC"),  a  public  benefit  corporation
empowered to  issue long-term  obligations  to fund  certain payments  to  local
governments  traditionally funded through the State's annual seasonal borrowing.
The legislation empowered  LGAC to issue  bonds and  notes in an  amount not  in
excess of $4.7 billion (exclusive of certain refunding bonds) plus certain other
amounts.  Over a period  of years, the issuance  of those long-term obligations,
which will be amortized  over no more  than 30 years, is  expected to result  in
eliminating  the  need for  continuing short-term  seasonal borrowing  for those
purposes. The legislation also imposed a cap on the annual seasonal borrowing of
the State at $4.7 billion, less net proceeds of bonds issued by LGAC, except  in
cases  where the  Governor and the  legislative leaders have  certified both the
need for additional  borrowing and provided  a schedule for  reducing it to  the
cap.  If borrowing  above the cap  is thus permitted  in any fiscal  year, it is
required by law to  be reduced to the  cap by the fourth  fiscal year after  the
limit was first exceeded.
 
    As of June 30, 1995, LGAC has issued bonds and notes to provide net proceeds
of  $4.7 billion completing the program.  The impact of this borrowing, together
with the availability of certain  cash reserves is that,  for the first time  in
nearly 35 years, the State Plan includes no short-term seasonal borrowing.
 
    COMPOSITION  OF  STATE GOVERNMENTAL  FUNDS GROUP.   Substantially  all State
non-pension financial operations are accounted  for in the State's  governmental
funds  group. Governmental funds  include: (i) the  General Fund, which receives
all income not required  by law to  be deposited in  another fund; (ii)  Special
Revenue  Funds, which receive the preponderance  of moneys received by the State
from the  Federal  government and  other  income the  use  of which  is  legally
restricted  to certain purposes;  (iii) Capital Projects  Funds, used to finance
the acquisition, construction and rehabilitation of major capital facilities  by
the  State and to aid in certain of such projects conducted by local governments
or public  authorities; and  (iv) Debt  Service Funds,  which are  used for  the
accumulation of moneys for the payment of principal of and interest on long-term
debt and to meet lease-purchase and other contractual-obligation commitments.
 
    AUTHORITIES.   The fiscal  stability of the  State is related  to the fiscal
stability of its public authorities  (i.e. public benefit corporations,  created
pursuant  to  State law,  other than  local  authorities), which  generally have
responsibility  for  financing,  constructing  and  operating  revenue-producing
public  benefit facilities.  The State's public  authorities (the "Authorities")
are not subject  to the constitutional  restrictions on the  incurrence of  debt
which  apply  to the  State itself,  and may  issue bonds  and notes  within the
amounts of, and as otherwise restricted by, their legislative authorization.  As
of  September 30, 1995, there  were 17 Authorities that  had outstanding debt of
$100 million or  more and  the aggregate outstanding  debt, including  refunding
bonds, of these 17 Authorities was $73.45 billion.
 
    Authorities  are generally supported  by revenues generated  by the projects
financed or operated, such  as fares, user fees  on bridges or tunnels,  highway
tolls  and  rentals  for  dormitory  rooms and  housing  units  and  charges for
occupancy at medical care facilities. In addition, State legislation  authorizes
several   financing  techniques  for  Authorities.  Also,  there  are  statutory
arrangements providing for State local assistance payments otherwise payable  to
localities  to be made under certain  circumstances to Authorities. Although the
State has no  obligation to  provide additional assistance  to localities  whose
local   assistance  payments   have  been   paid  to   Authorities  under  these
arrangements, if local assistance payments are diverted the affected  localities
could  seek additional  State assistance.  Some Authorities  also receive moneys
from State appropriations  to pay for  the operating costs  of certain of  their
programs.
 
                                       23
<PAGE>
    RATINGS.   On January 13, 1992, Standard & Poor's reduced its ratings on the
State's general obligation  bonds from  A to A-  and, in  addition, reduced  its
ratings  on  the  State's  moral  obligation,  lease  purchase,  guaranteed  and
contractual obligation  debt.  Standard &  Poor's  also continued  its  negative
rating  outlook assessment on State general  obligation debt. On April 26, 1993,
Standard & Poor's revised the rating  outlook assessment to stable. On  February
14,  1994, Standard  & Poor's raised  is outlook  to positive and,  on August 5,
1996, confirmed its  A- rating. On  January 6, 1992,  Moody's Investors  Service
reduced  its ratings on  outstanding limited-liability State  lease purchase and
contractual obligations from  A to  Baa1. On  July 26,  1996, Moody's  Investors
Service  reconfirmed its  A rating on  the State's  general obligation long-term
indebtedness. Ratings reflect only the  respective views of such  organizations,
and an explanation of the significance of such ratings must be obtained from the
rating  agency  furnishing the  same. There  is no  assurance that  a particular
rating will continue for any given period  of time or that any such rating  will
not  be revised downward or withdrawn entirely if, in the judgment of the agency
originally  establishing  the  rating,  circumstances  so  warrant.  A  downward
revision or withdrawal of such ratings, or either of them, may have an effect on
the  market price of the  State Municipal Securities in  which the New York Fund
invests.
 
    GENERAL OBLIGATION DEBT.   As of March 31,  1996, the State had  outstanding
approximately  $5.05 billion in general obligation bonds, including $294 million
in bond anticipation notes  outstanding. Principal and  interest due on  general
obligation  bonds and interest due on  bond anticipation notes were $735 million
for the 1995-96  fiscal years,  and are  estimated to  be $719  million for  the
State's 1996-97 fiscal year.
 
    LITIGATION.    The  State  is  a  defendant  in  numerous  legal proceedings
pertaining to  matters incidental  to the  performance of  routine  governmental
operations.  Such litigation  includes, but is  not limited  to, claims asserted
against the State  arising from  alleged torts, alleged  breaches of  contracts,
condemnation proceedings and other alleged violations of State and Federal laws.
These proceedings could affect adversely the financial condition of the State in
the 1996-1997 Fiscal Year or thereafter.
 
    The  State  believes  that  the  1996-1997  State  Financial  Plan  includes
sufficient reserves for the payment of judgments that may be required during the
1996-1997 fiscal  year. There  can be  no assurance,  however, that  an  adverse
decision  in  any  of these  proceedings  would  not exceed  the  amount  of the
1996-1997 Financial Plan reserves for  the payment of judgments and,  therefore,
could  affect the ability  of the State  to maintain a  balanced 1996-1997 State
Financial Plan. In its  audited financial statements for  the fiscal year  ended
March  31,  1996, the  State reported  its estimated  liability for  awarded and
unanticipated unfavorable judgments at $474 million.
 
    In addition, the  State is party  to other claims  and litigation which  its
counsel  has advised are  not probable of adverse  court decisions. Although the
amounts of potential losses, if any,  are not presently determinable, it is  the
State's  opinion that its ultimate  liability in these cases  is not expected to
have a  material  adverse  effect  on the  State's  financial  position  in  the
1996-1997 fiscal year or thereafter.
 
    OTHER  LOCALITIES.   Certain localities in  addition to the  City could have
financial problems leading  to requests for  additional State assistance  during
the  State's 1996-97  fiscal year  and thereafter.  The potential  impact on the
State of such actions by  localities is not included  in the projections of  the
State receipts and disbursements in the State's 1995-96 fiscal year.
 
    For  example,  fiscal  difficulties  experienced  by  the  City  of  Yonkers
("Yonkers") resulted in the creation of the Financial Control Board for the City
of Yonkers (the  "Yonkers Board") by  the State  in 1984. The  Yonkers Board  is
charged with oversight of the fiscal affairs of Yonkers. Future actions taken by
the  Governor  or  the  State  Legislature to  assist  Yonkers  could  result in
increased state expenditures for extraordinary local assistance.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund  offers its shares for sale to  the
public on a continuous basis, without a sales charge. Pursuant to a Distribution
Agreement between the Fund and Dean Witter
 
                                       24
<PAGE>
Distributors  Inc. (the "Distributor"),  an affiliate of  the Investment Manager
and a wholly-owned subsidiary of DWDC, shares of the Fund are distributed by the
Distributor and through  certain selected broker-dealers  who have entered  into
agreements  with the Distributor ("Selected Broker-Dealer") at an offering price
equal to the net asset value per  share next determined following receipt of  an
effective  purchase  order  (accompanied  by  Federal  Funds).  Dealers  in  the
securities markets  in which  the  Fund will  invest usually  require  immediate
payment in federal funds. Since the payment by a Fund shareholder for his or her
other  shares cannot be invested until it is converted into and available to the
Fund in federal funds, the Fund requires such payments to be so available before
a share purchase  order can be  considered effective. All  checks submitted  for
payment  are accepted subject to collection at  full face value in United States
funds and must be drawn in United States dollars on a United States bank.
 
    The Board of Trustees of the Fund, including a majority of the Trustees  who
are  not and were not at the time of their vote "Interested persons" (as defined
in the Act)  of either  party to  the Distribution  Agreement (the  "Independent
Trustees"),  approved,  at its  meeting held  on October  30, 1992,  the current
Distribution Agreement appointing the  Distributor exclusive distributor of  the
Fund's  shares and providing  for the Distributor  to bear distribution expenses
not borne by the Fund. The Distribution  Agreement took effect on June 30,  1993
upon  the spin-off by Sears, Roebuck and Co. of its remaining shares of DWDC. By
its terms, the Distribution Agreement had an initial term ending April 30, 1994,
and will remain in effect from year to year thereafter if approved by the Board.
At their meeting  held on April  17, 1996,  the Trustees, including  all of  the
Independent  Trustees, approved the most recent continuation of the Distribution
Agreement until April 30, 1997.
 
SHAREHOLDER INVESTMENT ACCOUNT
 
    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 directly through the  Transfer Agent, the shareholder  will be mailed  a
written confirmation of such transaction.
 
    DIRECT   INVESTMENTS  THROUGH  TRANSFER  AGENT.    A  shareholder  may  make
additional investments  in  Fund shares  at  any time  through  the  Shareholder
Investment  Account by sending a check payable to Dean Witter New York Municipal
Money Market Trust in any amount, not  less than $100, directly to the  Transfer
Agent.  The shares so  purchased will be credited  to the Shareholder Investment
Account.
 
    ACCOUNT STATEMENTS.  All  purchases of Fund shares  will be credited to  the
shareholder  in a Shareholder Investment  Account maintained for the shareholder
by the Transfer Agent in full and fractional shares of the Fund (rounded to  the
nearest  1/100  of  a  share  with  the  exception  of  purchases  made  through
reinvestment of dividends, which are  rounded to the last  1/100 of a share).  A
statement  of the account will be mailed  to the shareholder after each purchase
or redemption  transaction  effected through  the  Transfer Agent.  A  quarterly
statement  of the account  is sent to all  shareholders. Share certificates will
not be issued unless  requested in writing by  the shareholder. No  certificates
will  be issued for  fractional shares or  to shareholders who  have elected the
checking account or predesignated bank account methods of withdrawing cash  from
their accounts.
 
    The  Fund reserves  the right to  reject any  order for the  purchase of its
shares. In addition, the offering  of Fund shares may  be suspended at any  time
and resumed at any time thereafter.
 
                                       25
<PAGE>
EXCHANGE PRIVILEGE
 
    As  discussed in the  Prospectus under the  caption "Exchange Privilege," an
Exchange Privilege exists whereby investors who have purchased shares of any  of
the  Dean Witter Funds sold with either  a front-end sales charge ("FESC funds")
or a contingent deferred  sales charge ("CDSC funds")  will be permitted,  after
the  shares  of the  Fund  acquired by  purchase  (not by  exchange  or dividend
reinvestment) have been held  for thirty days,  to redeem all  or part of  their
shares  in that  Fund, have the  proceeds invested  in shares of  the Fund, Dean
Witter Liquid Asset  Fund Inc., Dean  Witter Tax-Free Daily  Income Trust,  Dean
Witter  California Tax-Free Daily  Income Trust, or  Dean Witter U.S. Government
Money Market Trust (which  five funds are called  "money market funds") or  Dean
Witter Short-Term U.S. Treasury Trust, Dean Witter Limited Term Municipal Trust,
Dean  Witter Short-Term Bond Fund, Dean Witter Balanced Income Fund, Dean Witter
Balanced Growth Fund or Dean Witter Intermediate Term U.S. Treasury Trust (these
eleven funds, including  the Fund, are  collectively referred to  herein as  the
"Exchange Funds"). There is no waiting period for shares acquired by exchange or
dividend reinvestment. Subsequently, shares of the Exchange Funds received in an
exchange  for shares of an FESC fund  (regardless of the type of fund originally
purchased) may be redeemed and exchanged for shares of the Exchange Funds,  FESC
funds or CDSC funds (however, shares of CDSC funds, including shares acquired in
exchange for (i) shares of FESC funds or (ii) shares of the Exchange Funds which
were  acquired in exchange  for shares of  FESC funds, may  not be exchanged for
shares of FESC funds). Additionally, shares of the Exchange Funds received in an
exchange for shares of a  CDSC fund (regardless of  the type of fund  originally
purchased)  may be redeemed  and exchanged for  shares of the  Exchange Funds or
CDSC funds. Ultimately,  any applicable  contingent deferred  sales charge  will
have to be paid upon redemption of shares originally purchased from a CDSC fund.
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.)
 
    When  shares of any  CDSC fund are exchanged  for shares of  the Fund or any
other Exchange Fund, the exchange is  executed at no charge to the  shareholder,
without  the imposition of the contingent  deferred sales charge ("CDSC") at the
time of the exchange. During the period  of time the shareholder remains in  the
Exchange  Funds (calculated from the last day of the month in which the Exchange
Fund shares were reacquired), the holding period or "year since purchase payment
made" is frozen. When shares are redeemed  out of the Exchange Funds, 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 of a CDSC
fund exchanged into an Exchange Fund on or after April 23, 1990, upon 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 CDSC  fund from the
Exchange Funds, 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 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  CDSC
fund.  Shares of a CDSC fund acquired in exchange for shares of an FESC fund (or
in exchange for shares of  other Dean Witter Funds for  which shares of an  FESC
fund have been exchanged) are not subject to any CDSC upon their redemption.
 
                                       26
<PAGE>
    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  and (iii) acquired in  exchange for shares of  FESC funds, or for
shares of other  Dean Witter  Funds for  which shares  of FESC  funds have  been
exchanged  (all  such shares  called "Free  Shares"),  will be  exchanged first.
Shares of Dean  Witter American  Value Fund acquired  prior to  April 30,  1984,
shares  of Dean Witter  Dividend Growth Securities Inc.  and Dean Witter Natural
Resource Development Securities Inc. acquired prior to July 2, 1984, and  shares
of  Dean Witter  Strategist Fund  acquired prior to  November 8,  1989, 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 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  exchange procedures described in the CDSC fund 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 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 DWR 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, Distributor or any Selected Broker-Dealer.
 
    Exchange Privilege accounts may also  be maintained for shareholders of  the
money  market funds who acquired their shares  in exchange for shares of various
TCW/DW Funds, a  group of  funds distributed by  the Distributor  for which  TCW
Funds  Management,  Inc.  serves  as Adviser,  under  the  terms  and conditions
described in  the Prospectus  and Statement  of Additional  Information of  each
TCW/DW Fund.
 
    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 the shares of  any
other  fund  and  the  general  administration  of  the  Exchange  Privilege. No
commission or discounts will  be paid to DWR  or any Selected Broker-Dealer  for
any transactions pursuant to this Exchange Privilege.
 
    The  current prospectus for each  fund describes its investment objective(s)
and policies, and  shareholders should obtain  a copy and  examine it  carefully
before investing. An exchange will be treated
 
                                       27
<PAGE>
for  federal  income tax  purposes the  same  as a  repurchase or  redemption of
shares, on which the  shareholder may realize a  capital gain or loss.  However,
the ability to deduct capital losses on an exchange may be limited in situations
where  there is an  exchange of shares  within ninety days  after the shares are
purchased. The Exchange Privilege is only available in states where an  exchange
may legally be made.
 
    Shares  of the Fund acquired pursuant to the Exchange Privilege will be held
by the Fund's transfer agent in an Exchange Privilege Account distinct from  any
account  of  the same  shareholder  who may  have  acquired shares  of  the Fund
directly. A shareholder  of the Fund  will not be  permitted to make  additional
investments  in such Exchange Privilege Account,  except through the exchange of
additional shares of the fund in  which the shareholder had initially  invested,
and  the proceeds of any shares redeemed from such Account may not thereafter be
placed back  into  that Account.  If  such a  shareholder  desires to  make  any
additional  investments in the  Fund, a separate account  will be maintained for
receipt of such  investments. The Fund  will have additional  costs for  account
maintenance if a shareholder has more than one account with the Fund.
 
    The  Fund also  maintains Exchange  Privilege Accounts  for shareholders who
acquired their shares  of the Fund  pursuant to exchange  privileges offered  by
other  investment companies with which the Investment Manager is not affiliated.
The Fund also  expects to  make available  such exchange  privilege accounts  to
other  investment  companies that  may hereafter  be  managed by  the Investment
Manager.
 
    Exchanges are subject to  the minimum investment  requirement and any  other
conditions  imposed by each fund. The  minimum initial investment is $10,000 for
Dean Witter  Short-Term U.S.  Treasury Trust  (although that  fund may,  in  its
discretion,  accept initial purchases as low as $5,000) and $5,000 for the Fund,
Dean Witter Liquid Asset Fund Inc., Dean Witter Tax-Free Daily Income 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 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 money market  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 any of the Dean Witter Funds, 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,  TCW/DW  North  American  Government  Income  Trust, TCW/DW
Balanced Fund  and TCW/DW  Income  and Growth  Fund,  pursuant to  the  Exchange
Privilege, and provided further that the Exchange Privilege may be terminated or
materially  revised 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.
 
    The  current prospectus for each  fund describes its investment objective(s)
and policies, and  shareholders should obtain  a copy and  examine it  carefully
before  investing. An exchange  will be treated for  federal income tax purposes
the same as a repurchase or redemption  of shares, on which the shareholder  may
realize a capital gain or loss. However, the ability to deduct capital losses on
an
 
                                       28
<PAGE>
exchange  may be  limited in  situations where  there is  an exchange  of shares
within ninety days  after the shares  are purchased. The  Exchange Privilege  is
only  available in  states where  an exchange may  legally be  made. For further
information regarding the Exchange Privilege, shareholders should contact DWR or
other selected broker-dealer account executive or the Transfer Agent.
 
PLAN OF DISTRIBUTION
 
    In accordance with a Plan of  Distribution pursuant to Rule 12b-1 under  the
Act  between the Fund and Dean Witter Distributors Inc. (the "Distributor"), the
Distributor provides certain services in connection with the promotion of  sales
of  Fund shares  (the "Plan"  refers to the  Plan and  Agreement of Distribution
prior  to  the  reorganization  and  to  the  Plan  of  Distribution  after  the
reorganization).  The Plan was approved by the Board of Trustees on February 15,
1990 and  by DWR  as the  Fund's then  sole shareholder  on February  16,  1990,
whereupon the Plan went into effect. The vote of the Trustees, which was cast in
person  at a meeting called  for the purpose of voting  on such Plan, included a
majority of the Trustees who  are not and were not  at the time of their  voting
interested  persons of the Fund and who have  and had at the time of their votes
no direct  or indirect  financial interest  in the  operation of  the Plan  (the
"Independent  Trustees"). The Shareholders of the Fund subsequently approved the
Plan at a Special Meeting of Shareholders held on June 20, 1991.
 
    The Plan provides that the Distributor bears the expense of all  promotional
and  distribution related activities on behalf  of the Fund, except for expenses
that the  Trustees determine  to reimburse,  as described  below. The  following
activities  and services may be provided by  the Distributor under the Plan: (1)
compensation to and expenses of DWR's and other Selected Broker-Dealers' account
executives and other employees, including  overhead and telephone expenses;  (2)
sales incentives and bonuses to sales representatives and to marketing personnel
in  connection with promoting sales of  the Fund's shares; (3) expenses incurred
in connection  with promoting  sales of  the Fund's  shares; (4)  preparing  and
distributing  sales literature;  and (5)  providing advertising  and promotional
activities, including direct mail solicitation and television, radio, newspaper,
magazine and other media advertisements.
 
    DWR account executives are paid  an annual residual commission, currently  a
gross  residual of up to  0.10% of the current  value of the respective accounts
for which they are the account executives  of record. The "gross residual" is  a
charge which reflects residual commissions paid by DWR to its account executives
and  DWR's  expenses associated  with the  servicing of  shareholder's accounts,
including the expenses of operating DWR's branch offices in connection with  the
servicing  of shareholder's  accounts, which  expenses include  lease costs, the
salaries and  employee  benefits  of operations  and  sales  support  personnel,
utility costs, communications costs and the costs of stationery and supplies and
other expenses relating to branch office serving of shareholder accounts.
 
    The  Fund is  authorized to  reimburse specific  expenses incurred  or to be
incurred in promoting the  distribution of the  Fund's shares. Reimbursement  is
made  through monthly payments in amounts determined in advance of each calendar
quarter by the Trustees, including a  majority of the Independent Trustees.  The
amount  of each  monthly payment  may in no  event exceed  an amount  equal to a
payment at the annual rate of 0.15 of 1% of the Fund's average daily net  assets
during  the month. No interest  or other financing charges  will be incurred for
which reimbursement  payments under  the  Plan will  be  made. In  addition,  no
interest  charges, if any, incurred on  any distribution expense incurred by the
Distributor or other selected dealers pursuant to the Plan, will be reimbursable
under the Plan. In  making quarterly determinations of  the amounts that may  be
expended  by the Fund, the Investment Manager provides and the Trustees review a
quarterly budget of projected incremental  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 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  shares.  The  Fund
reimbursed  $38,852 to  the Distributor pursuant  to the Plan  which amounted to
0.09 of 1% of the  Fund's average daily net assets  for the year ended  December
31,  1996. Based  upon the  total amounts  spent by  the Distributor  during the
period, it is estimated that the amount paid by the Fund to the Distributor  for
distribution was
 
                                       29
<PAGE>
spent  in approximately the following ways: (i) advertising--$-0-; (ii) printing
and  mailing  prospectuses  to  other  than  current  shareholders--$-0-;  (iii)
compensation  to  underwriters--$-0-;  (iv) compensation  to  dealers--$-0-; (v)
compensation to  sales  personnel--$-0-;  and  (vi)  other,  which  accrued  for
expenses  relating to  compensation of  sales personnel  and other miscellaneous
expenses--$38,852. No payments under the Plan were made for overhead,  interest,
carrying or other financing charges.
 
    Under  the Plan, the Distributor uses its best efforts in rendering services
to the  Fund,  but in  the  absence of  willful  misfeasance, bad  faith,  gross
negligence  or reckless  disregard of  its obligations,  the Distributor  is not
liable to the  Fund or  any of  its shareholders for  any error  of judgment  or
mistake  of law or  for any act or  omission or for any  losses sustained by the
Fund or its shareholders.
 
    Continuance of the Plan until April  30, 1997 was approved by the  Trustees,
including a majority of the Independent 12b-1 Trustees, at their meeting held on
April  17, 1996. In making their determination  to continue the Plan until April
30, 1997, the  Board of  Trustees, including  all of  the Independent  Trustees,
arrived at the conclusion that the Plan the Directors were provided at the April
17,  1996 meeting had  benefitted the Fund.  This conclusion was  based upon the
Investment Manager's belief that the expenditures made pursuant to the Plan  had
tended  to arrest the decline of Fund  assets by meeting the competitive efforts
of other, similar financial products, and had encouraged the account  executives
employed  by DWR and other Selected  Broker-Dealers to increase their efforts in
selling shares of  the Fund. The  Board of Trustees,  including the  Independent
Trustees,  also  concluded  that,  in  their  judgment,  there  is  a reasonable
likelihood that the Plan will continue to benefit the Fund and its shareholders.
An amendment to increase  materially the maximum amount  authorized to be  spent
under  the  Plan must  be  approved by  the shareholders  of  the Fund,  and all
material amendments to the Plan must 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 the holders of a majority of the Independent 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 30 days' written notice to any other  party
to  the Plan. So long as  the Plan is in effect,  the selection or nomination of
the Independent  Trustees is  committed  to the  discretion of  the  Independent
Trustees.
 
    At  their  meeting held  on  October 30,  1992,  the Trustees  of  the Fund,
including all of the independent 12b-1 Trustees, approved certain amendments  to
the  Plan which took  effect in January,  1993 and were  designed to reflect the
fact that  upon  the  reorganization described  above,  the  share  distribution
activities,  theretofore  performed by  the Fund  or  for the  Fund by  DWR were
assumed by the Distributor and DWR's,  sales activities are now being  performed
pursuant to the terms of a selected dealer agreement between the Distributor and
DWR.  The amendments provide  that payments under  the Plan will  be made to the
Distributor rather than to the Investment  Manager as before the amendment,  and
that  the  Distributor  in turn  is  authorized  to make  payments  to  DWR, its
affiliates or other Selected  Broker-Dealers (or direct that  the Fund pay  such
entities  directly). The Distributor  is also authorized to  retain part of such
fee as compensation for its own distribution-related expenses.
 
    Under the  Plan,  the Distributor  provides  the  Fund, for  review  by  the
Trustees,  and  the Trustees  review, promptly  after the  end of  each calendar
quarter, a  written  report  regarding  the  incremental  distribution  expenses
incurred  on  behalf of  the  Fund during  such  calendar quarter,  which report
includes (1) an itemization of the types of expenses and the purposes therefore;
(2) the amounts of such expenses; and (3) a description of the benefits  derived
by  the Fund. In  the Trustees' quarterly  review of the  Plan they consider its
continued appropriateness and the level of compensation provided therein.
 
    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, had any direct or indirect
financial  interest in  the operation  of the Plan  and Agreement  except to the
extent that the Distributor, DWR, DWSC  or the Investment Manager or certain  of
its  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.
 
                                       30
<PAGE>
HOW NET ASSET VALUE IS DETERMINED
- --------------------------------------------------------------------------------
 
    As  discussed  in  the  Prospectus,  the net  asset  value  of  the  Fund is
determined as  of the  close of  trading 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.
 
    The  Fund  utilizes  the  amortized cost  method  in  valuing  its portfolio
securities for purposes  of determining  the net asset  value of  shares of  the
Fund.  The  Fund utilizes  the amortized  cost method  in valuing  its portfolio
securities even  though the  portfolio securities  may increase  or decrease  in
market  value,  generally, in  connection with  changes  in interest  rates. The
amortized cost  method of  valuation involves  valuing a  security at  its  cost
adjusted  by a  constant amortization  to maturity  of any  discount or premium,
regardless of the impact  of fluctuating interest rates  on the market value  of
the instrument. While this method provides certainty in valuation, it may result
in  periods during which  value, as determined  by amortized cost,  is higher or
lower than the price the  Fund would receive if  it sold the instrument.  During
such  periods, the yield to investors in  the Fund may differ somewhat from that
obtained in a  similar company  which uses  mark to  market values  for all  its
portfolio  securities. For example, if  the use of amortized  cost resulted in a
lower (higher)  aggregate portfolio  value on  a particular  day, a  prospective
investor  in the Fund  would be able  to obtain a  somewhat higher (lower) yield
than would  result  from investment  in  such  a similar  company  and  existing
investors  would  receive less  (more) investment  income.  The purpose  of this
method of calculation is to facilitate  the maintenance of a constant net  asset
value per share of $1.00.
 
    The  Fund's  use  of  the  amortized  cost  method  to  value  its portfolio
securities and the  maintenance of the  per share  net asset value  of $1.00  is
permitted  pursuant to Rule 2a-7 of the  Act (the "Rule"), and is conditioned on
its compliance with various conditions contained in the Rule including: (a)  the
Trust's  Trustees  are  obligated,  as a  particular  responsibility  within the
overall duty of care owed to  the Trust's shareholders, to establish  procedures
reasonably  designed,  taking into  account  current market  conditions  and the
Fund's investment  objective to  stabilize  the net  asset  value per  share  as
computed  for the purpose of distribution and redemption at $1.00 per share; (b)
(i) the procedures include calculation, at  such intervals as are reasonable  in
light  of current market conditions, of the  deviation, if any between net asset
value per share using amortized cost to value portfolio securities and net asset
value per share  based upon  available market  quotations with  respect to  such
portfolio securities (for the purpose of determining market value, securities as
to  which the Trust has a "put" will be  valued at the higher of market value or
exercise price); (ii) periodic review by the Trustees of the amount of deviation
as well  as methods  used to  calculate  it, and  (iii) maintenance  of  written
records of the procedures, the Trustees considerations made pursuant to them and
any actions taken upon such consideration; the Trustees will consider what steps
should  be taken, if any,  in the event of  a difference of more  than 1/2 of 1%
between the two  methods of  valuation; and (c)  the Trustees  should take  such
action as they deem appropriate to eliminate or reduce, to the extent reasonably
practicable,  material dilution or other unfair results to investors or existing
shareholders. Such action  may include: selling  portfolio instruments prior  to
maturity  to realize capital gains or losses or to shorten the average portfolio
maturity of the Trust;  withholding dividends; utilizing a  net asset value  per
share  as determined by using available market quotations or reducing the number
of its outstanding shares. Any reduction of outstanding shares will be  effected
by  having each shareholder proportionately contribute  to the Trust's capital a
number of  shares which  represent  the difference  between the  amortized  cost
valuation and market valuation of the portfolio. Each shareholder will be deemed
to have agreed to such contribution by his or her investment in the Trust.
 
    The  Rule  further requires  that  the Fund  limit  its investments  to U.S.
dollar-denominated instruments which  the Board of  Trustees determines  present
minimal  credit risks and which are  Eligible Securities (as defined below). The
Rule also requires  the Fund  to maintain  a dollar  weighted average  portfolio
maturity  (not more than 90 days) appropriate  to its objective of maintaining a
stable net asset  value of $1.00  per share  and precludes the  purchase of  any
instrument    with    a    remaining   maturity    of    more    than   thirteen
 
                                       31
<PAGE>
months. Should  the disposition  of  a portfolio  security  result in  a  dollar
weighted  average portfolio  maturity of  more than 90  days, the  Fund would be
required to  invest its  available  cash in  such a  manner  as to  reduce  such
maturity to 90 days or less as soon as is reasonably practicable.
 
    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. Repurchase agreements are  valued at the face
value of the repurchase agreement plus any accrued interest thereon to date.
 
    Generally, for  purposes  of the  procedures  adopted under  the  Rule,  the
maturity  of  a  portfolio  instrument  is deemed  to  be  the  period remaining
(calculated from the trade date or such other date on which the Trust's interest
in the instrument is subject to market action) until the date noted on the  face
of  the instrument as the date on which the principal amount must be paid, or in
the case  of  an  instrument  called  for redemption,  the  date  on  which  the
redemption payment must be made.
 
    A  variable rate obligation that is subject to a demand feature is deemed to
have a maturity  equal to  the longer  of the  period remaining  until the  next
readjustment  of the interest  rate or the period  remaining until the principal
amount can  be recovered  through demand.  A floating  rate instrument  that  is
subject  to a demand  feature is deemed to  have a maturity  equal to the period
remaining until the principal amount can be recovered through demand.
 
    An Eligible Security generally is defined in the Rule to mean (i)A  security
with  a remaining  maturity of  397 calendar  days or  less that  has received a
short-term rating (or that  has been issued  by an issuer)  that has received  a
short-term  rating with  respect to  a class  of debt  obligations, or  any debt
obligation within that class, that is  comparable in priority and security  with
the  security) by  the Requisite  NRSROs in  one of  the two  highest short-term
rating categories  (within  which  there may  be  sub-categories  or  gradations
indicating  relative standing);  or (ii)  A security:  (A) That  at the  time of
issuance had a remaining maturity of more than 397 calendar days but that has  a
remaining  maturity  of 397  calendar days  or  less; and  (B) Whose  issuer has
received from the  Requisite NRSROs a  rating with  respect to a  class of  debt
obligations (or any debt obligation within that class) that is now comparable in
priority  and security with the  security, in one of  the two highest short-term
rating categories  (within  which  there may  be  sub-categories  or  gradations
indicating  relative  standing);  or  (iii)  An  unrated  Security  that  is  of
comparable quality to a security meeting the requirements of (i) or (ii)  above,
as determined by the money market fund's board of directors.
 
    As  permitted by the Rule, the Board has delegated to the Trust's Investment
Manager, subject to the Board's oversight pursuant to guidelines and  procedures
adopted  by  the  Board, the  authority  to determine  which  securities present
minimal credit risks and which unrated  securities are comparable in quality  to
rated securities.
 
    The  Rule  further requires  that  the Fund  limit  its investments  to U.S.
dollar-denominated instruments  which  the Trustees  determine  present  minimal
credit  risks and which are Eligible Securities. The Rule also requires the Fund
to maintain a dollar-weighted average portfolio maturity (not more than 90 days)
appropriate to its objective  of maintaining a stable  net asset value of  $1.00
per share and precludes the purchase of any instrument with a remaining maturity
of  more than 397 days. Should the disposition of a portfolio security result in
a dollar-weighted average portfolio maturity of more than 90 days, the Fund will
invest its available cash in such a manner as to reduce such maturity to 90 days
or less as soon as is reasonably practicable.
 
    If the Board determines that  it is no longer in  the best interests of  the
Trust  and its shareholders to maintain a stable  price of $1.00 per share or if
the Board believes that maintaining such price no longer reflects a market-based
net asset value per share, the Board  has the right to change from an  amortized
cost  basis of valuation to valuation based on market quotations. The Trust will
notify shareholders of any such changes.
 
    The Fund will manage its portfolio in an effort to maintain a constant $1.00
per share price, but it  cannot assure that the value  of its shares will  never
deviate from this price. Since dividends from net
 
                                       32
<PAGE>
investment  income are declared and  reinvested on a daily  basis, the net asset
value per share,  under ordinary  circumstances, is likely  to remain  constant.
Realized  and unrealized  gains and  losses will not  be distributed  on a daily
basis but will be reflected in the  Fund's net asset value. The amounts of  such
gains  and losses will be considered by the Board of Trustees in determining the
action to be taken to maintain the Fund's $1.00 per share net asset value.  Such
action  may  include  distribution  at any  time  of  part or  all  of  the then
accumulated  undistributed  net   realized  capital  gains,   or  reduction   or
elimination  of daily dividends  by an amount equal  to part or  all of the then
accumulated net  realized capital  losses. However,  if realized  losses  should
exceed  the sum of net investment income plus realized gains on any day, the net
asset value per share on that day  might decline below $1.00 per share. In  such
circumstances,  the Fund may reduce or  eliminate the payment of daily dividends
for a period  of time in  an effort to  restore the Fund's  $1.00 per share  net
asset  value.  A decline  in prices  of securities  could result  in significant
unrealized depreciation on a mark-to-market basis. Under these circumstances the
Fund may reduce or eliminate  the payment of dividends  and utilize a net  asset
value per share as determined by using available market quotations or reduce the
number of its shares outstanding.
 
REDEMPTION OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As  discussed  in the  Prospectus, shares  of  the Fund  may be  redeemed or
repurchased at net asset value at any  time. When a redemption is made by  check
and  a check is presented to the  Transfer Agent for payment, the Transfer Agent
will  redeem  a  sufficient  number  of  full  and  fractional  shares  in   the
shareholder's  account  to  cover the  amount  of  the check.  This  enables the
shareholder to  continue earning  daily  income dividends  until the  check  has
cleared.
 
    A  check  drawn by  a shareholder  against his  or her  account in  the Fund
constitutes a request for redemption of a number of shares sufficient to provide
proceeds equal to the amount  of the check. Payment of  the proceeds of a  check
will  normally be made  on the next  business day after  receipt by the Transfer
Agent of the  check in  proper form.  Subject to the  foregoing, if  a check  is
presented for payment to the Transfer Agent by a shareholder or payee in person,
the  Transfer Agent will  make payment by means  of a check  drawn on the Fund's
account  or,  in  the  case  of  a  shareholder  payee,  to  the   shareholder's
predesignated bank account, but will not make payment in cash.
 
    The  Fund  reserves  the  right to  suspend  redemptions  or  repurchases or
postpone the date of payment (1) for any periods during which the New York Stock
Exchange is closed (other than for customary weekend and holiday closings),  (2)
when  trading  on  that  Exchange  is  restricted  or  an  emergency  exists, as
determined by the Securities  and Exchange Commission, so  that disposal of  the
Fund's  investments  or  determination of  the  Fund's  net asset  value  is not
reasonably practicable, or (3) for such other periods as the Commission by order
may permit for the protection of the Fund's investors.
 
    As discussed 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  shareholder  (other  than  shares  held  in  an  Individual
Retirement  Account or custodial account under Section 403(b)(7) of the Internal
Revenue Code) whose shares due to  redemptions by the shareholders have a  value
of  less than  $1,000 or such  lesser amounts  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 his or  her
shares  is less than $1,000 and  allow him or her 60  days to make an additional
investment in an amount which will increase  the value of his or her account  to
$1,000 or more before the redemption is processed.
 
    SYSTEMATIC  WITHDRAWAL PLAN.   As discussed in  the Prospectus, a systematic
withdrawal plan is available for shareholders who own or purchase shares of  the
Fund  having a minimum value of $5,000,  which provides for monthly or quarterly
checks in any dollar amount not less than $25 or in any whole percentage of  the
account balance on an annualized basis. 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
 
                                       33
<PAGE>
at their net asset value determined,  at the shareholder's option, on the  tenth
or  twenty-fifth day (or next 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 withdrawal plan may be terminated at
any time by the Fund.
 
    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. A shareholder may, at any time, change the
amount and interval of withdrawal payments through his or her Account  Executive
or  by written notification to the Transfer Agent. In addition, the party and/or
the address to which checks are mailed may be changed by written notification to
the Transfer Agent, with signature  guarantees required in the manner  described
above.  The shareholder may  also terminate the  withdrawal plan at  any time by
written notice to  the Transfer  Agent. In the  event of  such termination,  the
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 "Redemption of Fund Shares" in the Prospectus) at any time. If
the  number of  shares redeemed  is greater  than the  number of  shares paid as
dividends, such redemptions may, of course, eventually result in liquidation  of
all  the  shares  in  the  account.  The  automatic  cash  withdrawal  method of
redemption is not available for shares held in an Exchange Privilege Account.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    As discussed in  the Prospectus, the  Fund intends to  declare dividends  on
each  day the New York Stock Exchange is open for business and distribute all of
its daily net investment  income to shareholders  of record as  of the close  of
business the preceding business day.
 
    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.
 
    The Fund  has qualified  and  intends to  remain  qualified as  a  regulated
investment  company under Subchapter M of the  Internal Revenue Code of 1986, as
amended (the "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 in which it distributes such income and capital gains  to
its shareholders.
 
    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 quarter of  its taxable year,  at least 50%  of the value  of its total
assets in tax-exempt securities. An exempt-interest  dividend is that part of  a
dividend  distribution 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.
 
    The  Trustees may  revise the  dividend policy,  or postpone  the payment of
dividends, if the Fund should have  or anticipate any large unexpected  expense,
loss  or fluctuation in net assets which,  in the opinion of the Trustees, might
have a significant  adverse effect  on shareholders.  On occasion,  in order  to
maintain  a constant $1.00  per share net  asset value, the  Trustees may direct
that the number of outstanding shares be reduced in each shareholder's  account.
Such  reduction may result in taxable income, if any, to a shareholder in excess
of the net  increase (i.e.,  dividends, less such  reductions), if  any, in  the
shareholder's  account for a period. Furthermore, such reduction may be realized
as a capital loss when the shares are liquidated.
 
    A number of provisions included  in the Code by the  Tax Reform Act of  1986
may  affect  the federal  income tax  liability of  the Fund's  shareholders, by
reducing the  individual  and  corporate  income tax  rates  and  expanding  the
alternative  minimum tax provisions.  In general, lower  rates of taxation could
make tax-exempt bonds less attractive to investors and could decrease the  value
of the tax-exempt securities
 
                                       34
<PAGE>
held by the Fund and the net asset value of the Fund's shares. Furthermore, some
of  the changes  may reduce  the extent  to which  issuers may  issue tax-exempt
bonds. The Code now subjects  interest received on certain otherwise  tax-exempt
securities  to alternative minimum tax. This alternative minimum tax would apply
to interest received on "private activity bonds" (in general, bonds that benefit
non-governmental  entities)  issued  after   August  7,  1986  which,   although
tax-exempt,  are  used  for purposes  other  than those  generally  performed by
governmental 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.  A
substantial portion of the Fund's investments  may be in such "private  activity
bonds,"  with  the  result that  a  substantial portion  of  the exempt-interest
dividends paid by  the Fund may  be an  item of tax  preference to  shareholders
subject to the alternative minimum tax. The Fund will report to shareholders the
portion  of its dividends  declared during the  year which are  a tax preference
item for alternative minimum tax purposes, as well as the overall percentage  of
dividend  distributions which constitutes  exempt-interest dividends. Individual
taxpayers are generally subject to the alternative minimum tax if their "regular
tax" liability is less  than 24% of their  "alternative minimum taxable  income"
reduced  by an exemption  amount ranging from  $0 to $40,000  depending upon the
taxpayer's income  and  filing status.  Alternative  minimum taxable  income  is
generally  equal to  taxable income  with certain  adjustments and  increased by
certain "tax  preference  items" which  may  include  a portion  of  the  Fund's
dividends  as  described  above. In  addition,  the Code  further  provides that
corporations are subject to an alternative minimum tax based, in part, on 75% of
any excess of "adjusted  current earnings" over taxable  income as adjusted  for
other tax preferences. Because an exempt-interest dividend paid by the Fund will
be  included in computing adjusted current earnings, a corporate shareholder may
therefore be required to pay an increased alternative minimum tax as the  result
of receiving exempt-interest dividends paid by the Fund.
 
    The  Code provides  that every  person required  to file  a tax  return must
include on such return the amount of exempt-interest dividends received from the
Fund during the taxable year.
 
    The I Amendments  and Reauthorization Act  of 1986 (the  "I Act") imposes  a
deductible  tax on a corporation's  alternative minimum taxable income (computed
without regard to the alternative tax net operating loss deduction) at a rate of
$12 per  $10,000 (0.12%)  of alternative  minimum taxable  income in  excess  of
$2,000,000.  The tax will be imposed  for taxable years beginning after December
31, 1986  and before  January 1,  1996.  The tax  will be  imposed even  if  the
corporation  is  not required  to  pay an  alternative  minimum tax  because the
corporation's regular income  tax liability exceeds  its minimum tax  liability.
Exempt-interest  dividends paid by the Fund  that create alternative minimum tax
preferences for corporate shareholders under  the Code (as described above)  may
be subject to the tax.
 
    Within  60 days  after the  end of its  fiscal year,  the Fund  will mail to
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  to what extent the taxable portion is
short-term capital gains or ordinary  income. This percentage should be  applied
uniformly  to all monthly distributions made during the fiscal year to determine
what proportion of the dividends paid  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  interest and  realized net  short-term  capital
gains  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 cash. Since the Fund's income
is expected to be  derived entirely from interest  rather than dividends, it  is
anticipated  that none of  such dividend distributions will  be eligible for the
federal dividends received deduction available to corporations.
 
                                       35
<PAGE>
    Any loss on the sale or exchange of shares of the Fund which are held for  6
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.
 
    The  Code requires each regulated investment  company to pay a nondeductible
4% excise  tax  to the  extent  the company  does  not distribute,  during  each
calendar  year, 98% of its ordinary income, determined on a calendar year basis,
and 98% of its capital gains, determined  in general on an October 31 year  end,
plus   certain  undistributed   amounts  from   previous  years.   The  required
distributions, however, are  based only  on the  taxable income  of a  regulated
investment  company. The excise tax, therefore,  will generally not apply to the
tax-exempt income of a regulated investment company such as the Trust that  pays
exempt-interest  dividends. The  Fund anticipates  that it  will make sufficient
timely distributions to avoid imposition of the excise tax.
 
    Interest on indebtedness incurred or continued by a shareholder 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
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.
 
    To the  extent  that  dividends  are  derived  from  interest  on  New  York
tax-exempt  securities, such dividends  will also be exempt  from New York State
and City personal income taxes.  Interest on indebtedness incurred or  continued
to  purchase or  carry shares  of an  investment company  paying exempt-interest
dividends, such as the Fund, may not be deductible by the investor for State  or
City personal income tax purposes.
 
    The  foregoing relates to federal income taxation  and to New York State and
City personal income taxation  as in effect  as of the  date of the  Prospectus.
Distributions    from   investment   income   and   capital   gains,   including
exempt-interest dividends,  may  be  subject  to New  York  franchise  taxes  if
received  by a corporation doing business in  New York, to state taxes in states
other than New York and to local taxes.
 
    Shareholders are urged to consult their attorneys or tax advisers  regarding
specific questions as to federal, state or local taxes.
 
INFORMATION ON COMPUTATION OF YIELD
 
    The  Fund's current yield for  the seven days ending  December 31, 1996, was
2.92%. The effective annual yield on December 31, 1996, was 2.96% assuming daily
compounding.
 
    The Fund's annualized current yield, as may  be quoted from time to time  in
advertisements and other communications to shareholders and potential investors,
is  computed  by determining,  for a  stated seven-day  period, the  net change,
exclusive of  capital  changes and  including  the value  of  additional  shares
purchased  with dividends  and any  dividends declared  therefrom (which reflect
deductions of all expenses of the Fund such as management fees), in the value of
a hypothetical  pre-existing  account having  a  balance  of one  share  at  the
beginning of the period, and dividing the difference by the value of the account
at  the beginning of the base period to  obtain the base period return, and then
multiplying the base period return by (365/7).
 
    The Fund's annualized effective yield, as may be quoted from time to time in
advertisements and other communications to shareholders and potential investors,
is computed by  determining (for  the same stated  seven-day period  as for  the
current  yield), the net change, exclusive  of capital changes and including the
value of additional shares purchased  with dividends and any dividends  declared
therefrom
 
                                       36
<PAGE>
(which  reflect deductions of all expenses of the Fund such as management fees),
in the value  of a  hypothetical pre-existing account  having a  balance of  one
share  at the beginning of the period,  and dividing the difference by the value
of the account at  the beginning of  the base period to  obtain the base  period
return, and then compounding the base period return by adding 1, raising the sum
to a power equal to 365 divided by 7, and subtracting 1 from the result.
 
    The  yields quoted in any advertisement or other communication should not be
considered a representation of the  yields of the Fund  in the future since  the
yield  is not fixed. Actual yields will depend not only on the type, quality and
maturities of the investments held by the Fund and changes in interest rates  on
such investments, but also on changes in the Fund's expenses during the period.
 
    Yield information may be useful in reviewing the performance of the Fund and
for  providing  a  basis  for  comparison  with  other  investment alternatives.
However, unlike bank deposits or other  investments which typically pay a  fixed
yield for a stated period of time, the Fund's yield fluctuates.
 
    Based  upon a combined Federal  and New York personal  income tax bracket of
44.70%, the Fund's tax-equivalent yield for  the seven days ending December  31,
1996, was 5.28%.
 
    Tax-equivalent  yield is  computed by dividing  that portion  of the current
yield (calculated as described  above) which is tax-exempt  by 1 minus a  stated
tax  rate and adding the quotient  to that portion, if any,  of the yield of the
Fund that  is  not  tax-exempt.  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 the sum of  all distributions on 10,000,  50,000 or 100,000 shares  of
the  Fund since inception to $10,000, $50,000  and $100,000, as the case may be.
Investments of $10,000, $50,000 and $100,000 in the Fund at inception would have
grown to $12,013, $60,065 and $120,130, respectively, at December 31, 1996.
 
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 shareholders of the Fund are entitled to a
full vote for  each full share  held. All  of the Trustees,  except for  Messrs.
Bozic, Purcell and Schroeder, have been elected by the shareholders of the Fund,
most  recently at a  Special Meeting of  Shareholders held on  January 12, 1993.
Messrs. Bozic, Purcell and Schroeder were  elected by the other Trustees of  the
Fund  on April 8, 1994. The Trust shall  be of unlimited duration subject to the
provisions in the Declaration of Trust  concerning termination by action of  the
shareholders or the Trustees.
 
    The  Declaration of  Trust 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 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's property
for satisfaction of claims arising in  connection with the affairs of the  Fund.
With  the exceptions stated,  the Declaration of Trust  provides that a Trustee,
officer, employee or agent is entitled to be indemnified against all liabilities
in connection with the affairs of the Fund.
 
CUSTODIAN AND TRANSFER AGENT
- --------------------------------------------------------------------------------
 
    The Bank of New York, 90 Washington Street, New York, New York, 10286 is the
Custodian of the Fund's  assets. Any of  the Fund's cash  balances 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
 
                                       37
<PAGE>
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.
 
    The  Fund's fiscal year ends on December 31. The financial statements of the
Fund must  be audited  at least  once a  year by  independent accountants  whose
selection is made annually by the Fund's Board of Trustees.
 
LEGAL COUNSEL
- --------------------------------------------------------------------------------
 
    Barry  Fink,  Esq.,  who  is  an officer  and  the  General  Counsel  of the
Investment Manager, is an officer and the General Counsel of the Fund.
 
EXPERTS
- --------------------------------------------------------------------------------
 
    The financial  statements  of  the  Fund  included  in  the  Prospectus  and
incorporated  by reference in the Statement  of Additional Information 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.
 
FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------
 
    The audited financial statements of the Fund for the year ended December 31,
1996, and the report  of the independent accountants  thereon, are set forth  in
the Fund's Prospectus, and are incorporated herein by reference.
 
                                       38
<PAGE>
APPENDIX
- --------------------------------------------------------------------------------
 
RATINGS OF INVESTMENTS
 
MOODY'S INVESTORS SERVICE INC. ("MOODY'S")
 
                             MUNICIPAL BOND RATINGS
 
Aaa   Bonds which are rated Aaa are judged to be of the best quality. They carry
      the  smallest degree of  investment risk and are  generally referred to as
      "gilt edge."  Interest  payments  are  protected  by  a  large  or  by  an
      exceptionally  stable margin  and principal  is secure.  While the various
      protective  elements  are  likely  to  change,  such  changes  as  can  be
      visualized  are most unlikely to  impair the fundamentally strong position
      of such issues.
 
Aa    Bonds which are  Aa are judged  to be  of high quality  by all  standards.
      Together with the Aaa group they comprise what are generally known as high
      grade  bonds. They are rated lower than  the best bonds because margins of
      protection may not  be as  large as in  Aaa securities  or fluctuation  of
      protective  elements may  be of  greater amplitude  or there  may be other
      elements present which  make the  long-term risks  appear somewhat  larger
      than in Aaa securities.
 
A     Bonds  which are rated A possess  many favorable investment attributes and
      are to be  considered as  upper medium grade  obligations. Factors  giving
      security  to principal and interest  are considered adequate, but elements
      may be present which  suggest a susceptibility  to impairment sometime  in
      the future.
 
Baa   Bonds  which are  rated Baa  are considered  as medium  grade obligations;
      i.e., they  are  neither highly  protected  nor poorly  secured.  Interest
      payments  and  principal  security  appear adequate  for  the  present but
      certain protective elements  may be lacking  or may be  characteristically
      unreliable  over any  great length  of time.  Such bonds  lack outstanding
      investment characteristics and in fact have speculative characteristics as
      well.
 
      Bonds rated Aaa, Aa, A and Baa are considered investment grade bonds.
 
Ba    Bonds which are rated  Ba are judged to  have speculative elements;  their
      future  cannot  be considered  as well  assured.  Often the  protection of
      interest and principal payments  may be very  moderate, and therefore  not
      well safeguarded during both good and bad times in the future. Uncertainty
      of position characterizes bonds in this class.
 
B     Bonds  which are rated  B generally lack  characteristics of the desirable
      investment. Assurance of interest and principal payments or of maintenance
      of other terms of the contract over any long period of time may be small.
 
Caa   Bonds which are  rated Caa are  of poor  standing. Such issues  may be  in
      default  or  there  may be  present  elements  of danger  with  respect to
      principal or interest.
 
Ca    Bonds which are rated  Ca present obligations which  are speculative in  a
      high  degree.  Such  issues are  often  in  default or  have  other marked
      shortcomings.
 
C     Bonds which are rated C are the lowest rated class of bonds, and issues so
      rated can be regarded as having extremely poor prospects of ever attaining
      any real investment standing.
 
    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   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.
 
                                       39
<PAGE>
    RATING REFINEMENTS:  Moody's may apply  numerical modifiers, 1, 2, and 3  in
each  generic  rating classification  from Aa  through B  in its  municipal bond
rating system. The modifier  1 indicates that the  security ranks in the  higher
end  of  its  generic rating  category;  the  modifier 2  indicates  a mid-range
ranking; and a modifier 3 indicates that the issue ranks in the lower end of its
generic rating category.
 
                             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.
 
                                       40
<PAGE>
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.
 
CI    The rating "CI" is reserved for income bonds on which no interest is being
      paid.
 
NR    Indicates that no rating  has been requested,  that there is  insufficient
      information  on which to base a rating  or that Standard & Poor's does not
      rate a particular type of obligation as a matter of policy.
 
      Bonds rated  "BB",  "B",  "CCC",  "CC" and  "C"  are  regarded  as  having
      predominantly  speculative characteristics with respect to capacity to pay
      interest  and  repay  principal.  "BB"  indicates  the  least  degree   of
      speculation  and "C"  the highest degree  of speculation.  While such debt
      will likely have  some quality and  protective characteristics, these  are
      outweighed  by  large uncertainties  or  major risk  exposures  to adverse
      conditions.
 
      PLUS (+) OR MINUS (-):  The ratings from "AA" to "CCC" may be modified  by
      the  addition of a plus  or minus sign to  show relative standing with 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.
 
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<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:
 
    Issuers 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 payment  is very
      strong.
 
A-2   indicates capacity for timely payment  on issues with this designation  is
      strong.  However, the relative degree of  safety is not as overwhelming as
      for issues designated "A-1".
 
A-3   indicates a satisfactory capacity for timely payment. Obligations carrying
      this designation are,  however, somewhat  more vulnerable  to the  adverse
      effects  of changes in circumstances  than obligations carrying the higher
      designations.
 
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