DEAN WITTER CALIFORNIA TAX FREE DAILY INCOME TRUST
497, 1997-03-03
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<PAGE>
               PROSPECTUS
               FEBRUARY 25, 1997
 
               Dean Witter California Tax-Free Daily Income Trust (the "Fund")
is a no-load, open-end, diversified management investment company whose
investment objective is to provide as high a level of daily income exempt from
federal and California income tax as is consistent with stability of principal
and liquidity. The Fund has a Rule 12b-1 Distribution Plan (see below). The Fund
seeks to achieve its objective by investing primarily in high quality California
tax-exempt securities with short-term maturities, including Municipal Bonds,
Municipal Notes and Municipal Commercial Paper. The Trust may invest a
significant percentage of its assets in the securities of a single issuer and
therefore an investment in the Trust may be riskier than an investment in other
types of money funds. (See "Investment Objective and Policies.")
 
               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 pursuant to Rule 12b-1
under the Investment Company Act of 1940 (the "Act") with Dean Witter
Distributors Inc. (the "Distributor"), the Fund is authorized to reimburse for
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 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 25, 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.
 
<TABLE>
<S>                                <C>
Minimum initial investment ......  $5,000
Minimum additional investment....  $ 100
</TABLE>
 
Dean Witter
California Tax-Free Daily Income 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/5
Investment Objective and Policies/5
  Special Considerations Relating to California
  Tax-Exempt Securities/8
Investment Restrictions/9
Purchase of Fund Shares/10
Shareholder Services/12
Redemption of Fund Shares/15
Dividends, Distributions and Taxes/17
Additional Information/19
Financial Statements--December 31, 1996/21
Report of Independent Accountants/30
    
 
  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
 
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                diversified management investment company investing principally in short-term securities which are exempt from
                    federal and California 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 and other Selected Broker-Dealers
                    Purchases are at net asset value, without a sales charge. Minimum initial investment: $5,000. Subsequent
                    investments: $100 or more through the Transfer Agent; $1,000 or more through the account executive or $100 to
                    $5,000 through 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 California income tax as is consistent with
Objective           stability of principal and liquidity (see p. 5).
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          A diversified portfolio of California 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 5).
- ------------------------------------------------------------------------------------------------------------------------------------
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).
- ------------------------------------------------------------------------------------------------------------------------------------
Distributor         Dean Witter Distributors Inc. (the "Distributor") sells shares of the Fund through Dean Witter Reynolds Inc.
                    ("DWR") and other selected broker-dealers pursuant to selected dealer agreements. Other than the reimbursement
                    to the Distributor pursuant to to the Rule 12b-1 Distribution Plan, the Distributor receives no distribution
                    fees. (see p. 10).
- ------------------------------------------------------------------------------------------------------------------------------------
Plan of             The Fund is authorized to reimburse specific expenses incurred in promoting the distribution of the Fund's
Distribution        shares pursuant to a Plan of Distribution with the Distributor 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 .15
                    of 1% of average daily net assets of the Fund (see p. 11).
- ------------------------------------------------------------------------------------------------------------------------------------
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 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
                    California 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 13 of the Statement of Additional Information and
                    the discussions concerning "repurchase agreements" and "puts" on pages 14-15 of the Statement of Additional
                    Information, concerning any risks associated with such portfolio securities and management techniques. Since the
                    Fund concentrates its investments in California tax-exempt securities, the Fund is affected by any political,
                    economic or regulatory developments affecting the ability of California issuers to pay interest or repay
                    principal (see pages 8-9 of the Prospectus and pages 18-20 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. The  expenses and fees set forth  in the table are for  the
fiscal year ended December 31, 1996.
 
<TABLE>
<S>                                                                                      <C>
SHAREHOLDER TRANSACTION EXPENSES
- ---------------------------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases..............................................  None
Maximum Sales Charge Imposed on Reinvested Dividends...................................  None
Deferred Sales Charge..................................................................  None
Redemption Fees........................................................................  None
Exchange Fees..........................................................................  None
</TABLE>
 
<TABLE>
<S>                                                                                     <C>
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- --------------------------------------------------------------------------------------
Management Fees.......................................................................      0.50%
12b-1 Fee*............................................................................      0.10%
Other Expenses........................................................................      0.12%
Total Fund Operating Expenses.........................................................      0.72%
<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...............................................................   $       7    $      23    $      40    $      89
</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
                                                                                                                 JULY 22,
                                                                                                                  1988*
                                                     FOR THE YEAR ENDED DECEMBER 31,                             THROUGH
                            ---------------------------------------------------------------------------------  DECEMBER 31,
                              1996      1995         1994      1993      1992      1991      1990      1989        1988
                            --------  --------     --------  --------  --------  --------  --------  --------  ------------
<S>                         <C>       <C>          <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     $1.00       $1.00
                            --------  --------     --------  --------  --------  --------  --------  --------  ------------
Net investment income.....     0.026     0.030        0.021     0.018     0.023     0.037     0.049     0.056       0.024
Less dividends from net
 investment income........    (0.026)   (0.030)      (0.021)   (0.018)   (0.023)   (0.037)   (0.049)   (0.056)     (0.024)
                            --------  --------     --------  --------  --------  --------  --------  --------  ------------
Net asset value, end of
 period...................     $1.00     $1.00        $1.00     $1.00     $1.00     $1.00     $1.00     $1.00       $1.00
                            --------  --------     --------  --------  --------  --------  --------  --------  ------------
                            --------  --------     --------  --------  --------  --------  --------  --------  ------------
TOTAL INVESTMENT RETURN+..      2.68%     3.04%        2.17%     1.78%     2.37%     3.77%     5.04%     5.70%       2.45%(1)
 
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period,
 in thousands.............  $259,590  $254,376     $217,079  $251,059  $288,044  $332,426  $361,144  $341,682    $191,762
Ratios to average net
 assets:
  Expenses................      0.72 (4)     0.75%(4)     0.72%     0.71%     0.73%     0.70%     0.71%     0.68%       0.67%(2)(3)
  Net investment income...      2.63%     3.00%        2.13%     1.76%     2.35%     3.70%     4.89%     5.56%       5.47%(2)(3)
<FN>
- ---------------
    CALCULATED BASED ON THE NET ASSET VALUE AS OF THE LAST BUSINESS DAY OF
 +  THE PERIOD.
 *  COMMENCEMENT OF OPERATIONS.
(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 0.81% AND 5.33%, RESPECTIVELY.
(4) THE ABOVE RATIOS DO NOT REFLECT THE EFFECT OF EXPENSE OFFSETS OF
    0.01%.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
                                       4
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
    Dean Witter  California  Tax-Free Daily  Income  Trust (the  "Fund")  is  an
open-end, diversified management investment company. The Fund was organized as a
trust of the type commonly
known  as a "Massachusetts business  trust" on April 25,  1988 under the name of
Dean Witter/Sears California Tax-Free Daily Income 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 of
approximately $89.3 billion as of January 31, 1997. The Investment Manager  also
manages  and  advises  portfolios  of  pension  plans,  other  institutions  and
individuals which aggregated approximately $3.2 billion at such date.
 
    The Fund  has  retained the  Investment  Manager to  provide  administrative
services,  manage its business  affairs and manage the  investment of the Fund's
assets, including the placing of orders  for the purchase and sale of  portfolio
securities.  InterCapital  has retained  Dean  Witter Services  Company  Inc. to
perform the  aforementioned administrative  services for  the Fund.  The  Fund's
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.
 
    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.
 
    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 net assets exceeding $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 0.72% 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 California  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  securities the
interest on which is exempt from federal and California income tax. This  policy
and the Fund's investment objective
 
                                       5
<PAGE>
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.
 
    The Fund seeks to achieve its investment objective by investing primarily in
high  quality  tax-exempt  securities  with  short-term  maturities   (remaining
maturities  of thirteen months or less). Such securities will include California
Municipal  Bonds   and  California   Municipal  Notes   ("California   Municipal
Obligations")  and California Municipal Commercial Paper  which are rated in one
of the  two highest  rating categories  for  debt obligations  by at  least  two
nationally  recognized  statistical  rating  organizations  ("NRSROS"--primarily
Standard  &   Poor's  Corporation   ["S&P"]   and  Moody's   Investors   Service
["Moody's"]), 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.
 
    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.
 
    California Municipal  Obligations  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). California  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 Obligation
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 California
Municipal Obligation  only if,  in the  opinion of  bond counsel,  the  interest
payable therefrom is exempt from both federal income tax and California 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  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 analysis  will be reported to the Trustee
who will, in turn, determine whether the securities continue to present  minimal
credit risks to the Fund.
 
    The  ratings assigned by NRSRO's 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.
 
    The  two principal  classifications of California  Municipal Obligations 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
 
                                       6
<PAGE>
from the revenues derived from a particular facility or class of facilities  or,
in some cases, from specific revenue sources. Revenue bonds, notes or commercial
paper  are issued  for a  wide variety of  purposes, including  the financing of
electric, gas, water and  sewer systems and  other public utilities;  industrial
development  and pollution  control facilities; single  and multi-family housing
units; public buildings  and facilities;  air and  marine ports,  transportation
facilities  such as toll roads, bridges  and tunnels; and health and educational
facilities such as hospitals and dormitories.  They rely primarily on user  fees
to pay debt service, although the principal revenue source is often supplemented
by   additional   security  features   which   are  intended   to   enhance  the
creditworthiness of  the  issuer's  obligations.  In  some  cases,  particularly
revenue  bonds  issued to  finance  housing and  public  buildings, a  direct or
implied "moral obligation" of a governmental unit may be pledged to the  payment
of  debt service. In other cases, a special tax or other charge may augment user
fees.
 
    Included within  the  revenue 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 does  not generally intend  to invest  more than 25%  of its  total
assets in securities of any one governmental unit. 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.
 
                                       7
<PAGE>
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 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 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.
 
    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 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  DWR.
In  addition, the Fund may incur brokerage commissions on transactions conducted
through DWR.
 
SPECIAL CONSIDERATIONS RELATING TO CALIFORNIA TAX-EXEMPT SECURITIES
 
    The  Fund  will  be  affected  by  any  political,  economic  or  regulatory
developments  affecting the  ability of  California issuers  to pay  interest or
repay principal. Various developments regarding the California Constitution  and
State  statutes  which limit  the taxing  and  spending authority  of California
governmental entities may impair the  ability of California issuers to  maintain
debt  service on their obligations. The following information constitutes only a
brief summary and is not intended  as a complete description. See the  Statement
of Additional Information for a more detailed discussion.
 
    California  is the most populous state in the nation with a total population
at the 1990 census of 29,976,000. Growth has been incessant since World War  II,
with  population gains in each decade since  1950 of between 18% and 49%. During
the last decade, the population rose 20%.  The State now comprises 12.3% of  the
nation's population and 12.9% of its total personal income. Its economy is broad
and  diversified  with  major  concentrations in  high  technology  research and
manufacturing, aerospace and defense-related manufacturing, trade, real  estate,
and  financial services. After experiencing strong growth throughout much of the
1980s, the State was adversely affected  by both the national recession and  the
cutbacks  in aerospace  and defense  spending which had  a severe  impact on the
economy in Southern California. Although  California is still experiencing  some
of  the effects  of the  recession and  its unemployment  is above  the national
average, the gap  is narrowing and  is projected to  close to within  1% of  the
national  average in 1997, although  there can be no  assurance this will occur.
 
                                       8
<PAGE>
California's economic  recovery from  the recession  is continuing  at a  strong
pace.  Recent economic reports indicate that,  while the rate of economic growth
in California is expected to moderate  over the next three years, the  increases
in  employment  and income  may  exceed those  of  the nation  as  a whole  by a
significant margin.
 
    These economic difficulties have exacerbated the structural budget imbalance
which has been  evident since  fiscal year  1985-1986. Since  that time,  budget
shortfalls  have become increasingly  more difficult to solve  and the State has
recorded General Fund operating deficits in several fiscal years. Many of  these
problems have been attributable to the fact that the great population influx has
produced  increased demand  for education and  social services at  a far greater
pace than  the growth  in  the State's  tax  revenues. Despite  substantial  tax
increases,   expenditure   reductions  and   the   shift  of   some  expenditure
responsibilities to local government, the budget condition remains problematic.
 
    In July,  1996, the  Governor signed  into law  a new  $62.8 billion  budget
which,  among other things, significantly  increases education spending from the
previous fiscal year, reduces taxes for corporations and banks and provides  for
a  balanced budget at the close of the fiscal year. At the same time, the budget
continues several funding reductions  made in past years,  mostly to health  and
welfare  programs. Although  the state's budget  provides for a  reserve of $305
million, revenue and expenditure developments  have occurred which may have  the
effect  of reducing the reserve. The  Governor's proposed budget for fiscal year
1997-1998 indicates  total spending  of  $66.6 billion  and anticipates  a  $553
million  reserve for economic  uncertainties. As in the  past years, the state's
budget assumes savings  which depend  on future  federal actions,  both to  fund
programs   relating  to   Medical  and   incarceration  costs   associated  with
undocumented immigrants  and  to  relieve  the  state  from  federally  mandated
spending,  which may  not occur.  Accordingly, the  anticipated reserves  may be
reduced unless  the economy  outperforms expectations  or spending  falls  below
planned levels.
 
    Because of the State of California's continuing budget problems, the State's
General  Obligation bonds were downgraded in July 1994 from A1 to Aa by Moody's,
to A from A+ by S&P, and from AA to A by Fitch Investors Service, Inc. All three
rating agencies  expressed uncertainty  in the  State's ability  to balance  its
budget  by 1996.  However, in  1996, citing  California's improving  economy and
budget situation, both Fitch and Standard  & Poor's raised their ratings from  A
to A+.
 
    The  effect  of these  various constitutional  and statutory  amendments and
budget developments upon the ability of  California issuers to pay interest  and
principal  on their obligations remains unclear and in any event may depend upon
whether a  particular California  tax-exempt security  is a  general or  limited
obligation  bond  and on  the  type of  security provided  for  the bond.  It is
possible that  other measures  affecting  the taxing  or spending  authority  of
California  or  its political  subdivisions may  be approved  or enacted  in the
future.
 
    For a more detailed discussion of the State of California economic  factors,
see the Statement of Additional Information.
 
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
 
                                       9
<PAGE>
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  does not require
elimination of any security from the portfolio.
 
    The Fund may not:
 
   1. With respect to 75% of its total assets, purchase securities of any issuer
if, immediately thereafter, more than 5% of the value of its total assets are in
the securities of any one issuer  (other than obligations issued, or  guaranteed
by,  the United States  Government, its agencies or  instrumentalities or by the
State of California or its political subdivisions).
 
   2. With respect to  75% of its  total assets, purchase more  than 10% of  all
outstanding  taxable  debt  securities  of  any  one  issuer  (other  than  debt
securities issued, or  guaranteed as to  principal and interest  by, the  United
States Government, its agencies or instrumentalities).
 
   3.  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 by the State of  California or its political subdivisions,
or to domestic bank obligations.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    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 Distributors  Inc.  (the "Distributor"),  an affiliate  of  the
Investment  Manager, shares of  the Fund are distributed  by the Distributor and
through DWR and certain selected 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 the Fund's transfer  agent, 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  to the Transfer  Agent at P.O.  Box
1040,  Jersey City, N.J. 07303. Checks should be made payable to the Dean Witter
California Tax-Free Daily Income 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  account  of  Dean Witter  Trust  Company, Harborside
Financial Center, Plaza Two, Jersey City, New Jersey, Account Number 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
 
                                       10
<PAGE>
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 reserves 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
another  Selected Broker-Dealer  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 exists 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
other  Selected Broker-Dealer  customers who are  shareholders of  the Fund will
have free cash  credit balances  in their  DWR or  other 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 another  Selected Broker-Dealer, will not have  any
of  such funds invested  in the Fund  until the business  day after the customer
places an order with DWR or another Selected Broker-Dealer 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 another Selected  Broker-Dealer. Accordingly, DWR  or any other  Selected
Broker-Dealer  who follows  the above  procedure may have  the use  of such free
credit balances during such period.
 
PLAN OF DISTRIBUTION
 
    In accordance  with  a  Plan  of  Distribution  between  the  Fund  and  the
Distributor,  pursuant  to  Rule  12b-1  under  the  Act,  certain  services and
activities in  connection  with  the  distribution  of  the  Fund's  shares  are
reimbursable  expenses.  The  principal  activities and  services  which  may be
provided  by  the   Distributor,  DWR,   its  affiliates   and  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,  magazine  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 paid was accrued at the annual rate
of 0.10 of 1% of the Fund's average daily net assets. Expenses incurred pursuant
to the Plan in any fiscal
 
                                       11
<PAGE>
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  at 4:00 p.m. New
York time on each day that the New York Stock Exchange is open (or, on days when
the New York Stock Exchange closes prior to 4:00 p.m., at such earlier time)  by
taking  the 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.
    
 
    Shareholders  should  contact  their  DWR  or  other  Selected Broker-Dealer
account executive or the Transfer Agent for further information about any of the
above services.
 
    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  open-end  investment  company  for  which  InterCapital  serves   as
investment manager (collectively, with the Fund, the "Dean Witter Funds"), other
than  Dean Witter California Tax-Free Daily Income 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. 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
 
                                       12
<PAGE>
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 Tax-Free Daily  Income Trust, Dean  Witter
U.S.  Government Money Market Trust, Dean Witter Liquid Asset Fund Inc. and Dean
Witter New York Municipal Money Market  Trust (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 (which  eleven Funds,
including the  Fund, are  referred  to herein  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 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 other 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 other 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 shares  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  Funds (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 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  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
 
                                       13
<PAGE>
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 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  Funds for which shares  of the Fund  may be 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  another   Selected
Broker-Dealer  are referred to their account executive regarding restrictions on
exchanges of shares of the Fund pledged in their margin account.
 
    The current prospectus for each  fund describes its investment  objective(s)
and  policies, and shareholders  should obtain one and  read it carefully before
investing. Exchanges are subject to  the minimum investment requirement 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 Funds
pursuant to this Exchange Privilege by contacting their DWR or another  Selected
Broker-Dealer  account executive  (no Exchange  Privilege Authorization  Form is
required). Other shareholders (and those who are shareholders of DWR or  another
Selected  Broker-Dealer but  who wish to  make exchanges directly  by writing or
telephoning the Transfer Agent) must complete and forward to the Transfer  Agent
an  Exchange Privilege Authorization Form, copies  of which may be obtained from
the Transfer Agent, to initiate an exchange. If the Authorization Form is  used,
exchanges  may be made 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,
 
                                       14
<PAGE>
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.
 
    Shareholders  should  contact  their  DWR  or  other  Selected Broker-Dealer
account executive  or  the Transfer  Agent  for further  information  about  the
Exchange Privilege.
 
REDEMPTION 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 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.
 
                                       15
<PAGE>
    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 shareholders  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 such 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 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 were
purchased by check (including 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  at certain times when normal trading is not taking place on the New
York Stock Exchange.
 
    The Fund reserves the right,  on sixty days notice,  to redeem at net  asset
value  the shares of  any shareholder (other  than shares held  in an Individual
Retirement Account or custodial account
 
                                       16
<PAGE>
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 Trustees.
 
AUTOMATIC REDEMPTION PROCEDURE
 
    The Distributor has  instituted an automatic  redemption procedure which  it
may  utilize to  satisfy amounts  due 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
other   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 another 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 another 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 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 calendar 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 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
 
                                       17
<PAGE>
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-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  portion
of the Fund's investments may be made in such "private activity bonds," with the
result  that a 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.
 
    Under  California  law, a  fund which  qualifies  as a  regulated investment
company must have  at least 50%  of the value  of its total  assets invested  in
California  state and local issues or in  obligations of the United States which
pay interest excludable from income (or in a combination thereof), at the end of
each quarter of its taxable year in order to be eligible to pay dividends  which
will  be  exempt  from  California personal  income  tax.  Shareholders  who are
California residents will not incur any federal or California income tax on  the
amount  of exempt-interest dividends received by  them from the Fund and derived
from California state and local issues  or certain United States issues  whether
taken  in  cash or  reinvested in  additional  shares (to  the extent  that such
dividends are derived from California securities).
 
    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 California personal income tax purposes. Moreover, unlike federal
law, an  individual's Social  Security benefits  are not  subject to  California
personal income tax, so that the receipt of California exempt-interest dividends
will have no effect on an individual's California personal income tax.
 
    Shareholders  will normally  be subject  to federal  and California personal
income  tax  on  dividends  paid  from  interest  income  derived  from  taxable
securities and on distributions of net capital gains. For federal income tax and
California  personal  income tax  purposes,  distributions of  long-term capital
gains,  if  any,  are  taxable  to  shareholders  as  long-term  capital  gains,
regardless  of how long a shareholder has  held the Fund's shares and regardless
of whether  the  distribution is  received  in  additional shares  or  cash.  In
addition,  for California personal income tax  purposes, the shareholders of the
Fund will not be subject to tax, or  receive a credit for tax paid by the  Fund,
on  undistributed capital gains, if any. 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
 
                                       18
<PAGE>
<TABLE>
<S>                                                                                                           <C>  <C>  <C>  <C>
                                                                                                                4   4   0    --
                                                                                                                for office use only

                                                                                                                     [logo]

 
</TABLE>
 
                                                  [REMOVE APPLICATION CAREFULLY]
APPLICATION
 
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME 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 California Tax-Free Daily Income 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).
                          Your bank should wire to:

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

                        Account Number: 8900188413

                        Re: Dean Witter California Tax-Free Daily Income 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 California Tax-Free Daily Income Trust, please
                     indicate your fund account number here.
                        [4]   [4]   [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 California Tax-Free  Daily Income Trust  held in my (our)
                                    account provided that proceeds  are transmitted only to  the following bank  account.
                                    (Absent  its own  negligence, neither  Dean Witter  California Tax-Free  Daily Income
                                    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  California Tax-Free Daily  Income 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  California Tax-Free  Daily Income  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>

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

SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

SIGNATURE MUST BE KEPT WITHIN ABOVE AREA

REMOVE APPLICATION CAREFULLY




<PAGE>
deductible  by  the  investor  for federal  or  California  personal  income tax
purposes.
 
    The foregoing relates to federal income taxation and to California  personal
income  taxation as in effect  as of the date  of this Prospectus. Distributions
from investment income and  capital gains, including exempt-interest  dividends,
may  be subject to California franchise taxes if received by a corporation doing
business in California, to  state taxes in states  other than California and  to
local taxes.
 
    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
 
                                       19
<PAGE>
obtained from a  person's employment  activities and that  actual and  potential
conflicts  of  interest are  avoided.  To achieve  these  goals and  comply with
regulatory requirements, the Code of  Ethics requires, among other things,  that
personal  securities transactions by employees of the companies be subject to an
advance clearance process to monitor that no Dean Witter Fund is engaged at  the
same  time in a purchase or  sale of the same security.  The Code of Ethics bans
the purchase of securities in an initial public offering and prohibits  engaging
in  futures and options  transactions and profiting  on short-term trading (that
is, a purchase within 60 days of a sale or a sale within 60 days of a  purchase)
of  a security.  In addition,  investment personnel may  not purchase  or sell a
security for  their  personal  account  within  30  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 the telephone numbers or at the address, as
are set forth on the front cover of this Prospectus.
 
                                       20
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
FINANCIAL STATEMENTS
 
STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 1996
 
<TABLE>
<S>                                                           <C>
ASSETS:
Investments in securities, at value
  (amortized cost $261,110,289).............................  $261,110,289
Cash........................................................     1,015,479
Receivable for:
    Interest................................................     1,494,185
    Shares of beneficial interest sold......................            20
Prepaid expenses and other assets...........................        18,164
                                                              ------------
 
     TOTAL ASSETS...........................................   263,638,137
                                                              ------------
 
LIABILITIES:
Payable for:
    Shares of beneficial interest repurchased...............     3,806,471
    Investment management fee...............................       116,463
    Plan of distribution fee................................        23,293
Accrued expenses............................................       101,564
                                                              ------------
 
     TOTAL LIABILITIES......................................     4,047,791
                                                              ------------
 
NET ASSETS:
Paid-in-capital.............................................   259,590,211
Accumulated undistributed net investment income.............           135
                                                              ------------
 
     NET ASSETS.............................................  $259,590,346
                                                              ------------
                                                              ------------
 
NET ASSET VALUE PER SHARE,
  259,590,211 SHARES OUTSTANDING (UNLIMITED SHARES
  AUTHORIZED OF $.01 PAR VALUE).............................
                                                                     $1.00
                                                              ------------
                                                              ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       21
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 1996
 
<TABLE>
<S>                                                           <C>
NET INVESTMENT INCOME:
INTEREST INCOME.............................................  $8,859,047
                                                              ----------
EXPENSES
Investment management fee...................................   1,326,761
Plan of distribution fee....................................     263,178
Transfer agent fees and expenses............................     180,040
Professional fees...........................................      44,689
Shareholder reports and notices.............................      44,109
Trustees' fees and expenses.................................      15,347
Custodian fees..............................................      14,351
Registration fees...........................................       8,682
Other.......................................................       4,294
                                                              ----------
     TOTAL EXPENSES.........................................   1,901,451
     LESS: EXPENSE OFFSET...................................     (14,123)
                                                              ----------
     NET EXPENSES...........................................   1,887,328
                                                              ----------
     NET INVESTMENT INCOME..................................   6,971,719
     NET REALIZED GAIN......................................       1,280
                                                              ----------
NET INCREASE................................................  $6,972,999
                                                              ----------
                                                              ----------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       22
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                                                                    FOR THE
                                                                FOR THE YEAR      YEAR ENDED
                                                                    ENDED          DECEMBER
                                                              DECEMBER 31, 1996    31, 1995
- ---------------------------------------------------------------------------------------------
<S>                                                           <C>                 <C>
INCREASE (DECREASE) IN NET ASSETS:
OPERATIONS:
Net investment income.......................................    $  6,971,719      $6,918,770
Net realized gain...........................................           1,280          --
                                                              -----------------   -----------
     NET INCREASE...........................................       6,972,999       6,918,770
Dividends from net investment income........................      (6,972,113)     (6,918,924 )
Net increase from transactions in shares of beneficial
  interest..................................................       5,213,109      37,297,439
                                                              -----------------   -----------
     NET INCREASE...........................................       5,213,995      37,297,285
NET ASSETS:
Beginning of period.........................................     254,376,351      217,079,066
                                                              -----------------   -----------
     END OF PERIOD
    (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF $135
    AND $182, RESPECTIVELY).................................    $259,590,346      $254,376,351
                                                              -----------------   -----------
                                                              -----------------   -----------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       23
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
NOTES TO FINANCIAL STATEMENTS DECEMBER 31, 1996
 
1. ORGANIZATION AND ACCOUNTING POLICIES
 
Dean Witter California Tax-Free Daily Income Trust (the "Fund") is registered
under the Investment Company Act of 1940, as amended (the "Act"), as a
diversified, open-end management investment company. The Fund's investment
objective is to provide a high level of daily income which is exempt from
federal and California income tax, consistent with stability of principal and
liquidity. The Fund was organized as a Massachusetts business trust on April 25,
1988 and commenced operations on July 22, 1988.
 
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 by the identified cost method.
The Fund amortizes premiums and accretes discounts over the life of the
respective securities. Interest income is accrued daily.
 
C. FEDERAL INCOME TAX STATUS --  It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable and nontaxable income to its
shareholders. Accordingly, no federal income tax provision is required.
 
D. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS --  The Fund records dividends
and distributions to shareholders as of the close of each business day.
 
2. INVESTMENT MANAGEMENT AGREEMENT
 
Pursuant to an Investment Management Agreement with Dean Witter InterCapital
Inc. (the "Investment Manager"), the Fund pays the Investment Manager a
management fee, accrued daily and payable monthly, by applying the following
annual rates to the net assets of the Fund determined as of the close of each
business day: 0.50% to the portion of the daily net assets not exceeding $500
million; 0.425% to the portion of the daily net assets exceeding $500 million
but not exceeding $750 million; 0.375% to the portion of the daily net assets
exceeding $750 million but not exceeding
 
                                       24
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
NOTES TO FINANCIAL STATEMENTS DECEMBER 31, 1996, CONTINUED
 
$1 billion; 0.35% to the portion of the daily net assets exceeding $1 billion
but not exceeding $1.5 billion; 0.325% to the portion of the daily net assets
exceeding $1.5 billion but not exceeding $2 billion; 0.30% to the portion of the
daily net assets exceeding $2 billion but not exceeding $2.5 billion; 0.275% to
the portion of the daily net assets exceeding $2.5 billion but not exceeding $3
billion; and 0.25% to the portion of the 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 0.10%.
 
                                       25
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME 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 $574,934,850 and $568,092,000,
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 $20,000.
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 $855. At December 31, 1996, the Fund had an accrued pension liability of
$48,535 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 31,1996     DECEMBER 31, 1995
                                                                   --------------------  --------------------
<S>                                                                <C>                   <C>
Shares sold......................................................          496,028,291           483,320,990
Shares issued in reinvestment of dividends.......................            6,972,113             6,918,252
                                                                   --------------------  --------------------
                                                                           503,000,404           490,239,242
Shares repurchased...............................................         (497,787,295)         (452,941,803)
                                                                   --------------------  --------------------
Net increase in shares outstanding...............................            5,213,109            37,297,439
                                                                   --------------------  --------------------
                                                                   --------------------  --------------------
</TABLE>
 
6. SELECTED PER SHARE DATA AND RATIOS
See the "Financial Highlights" table on page 4 of this Prospectus.
 
                                       26
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
PORTFOLIO OF INVESTMENTS DECEMBER 31, 1996
 
<TABLE>
<CAPTION>
 PRINCIPAL
 AMOUNT IN                                                             COUPON        DEMAND
 THOUSANDS                                                              RATE+        DATE*          VALUE
- --------------------------------------------------------------------------------------------------------------
<C>        <S>                                                      <C>            <C>         <C>
           CALIFORNIA TAX-EXEMPT SHORT-TERM VARIABLE RATE MUNICIPAL OBLIGATIONS (61.8%)
 $  10,300 California Educational Facilities Authority, California
             Institute of Technology Ser 1994.....................        3.95%      01/08/97  $    10,300,000
           California Health Facilities Financing Authority,
     4,100   Catholic HealthCare West 1988 Ser A (MBIA)...........        4.00       01/08/97        4,100,000
     6,000   Childrens Hospital of Orange County Ser 1991
             (MBIA)...............................................        4.00       01/08/97        6,000,000
     5,000   Memorial Health Services Ser 1994....................        4.00       01/08/97        5,000,000
     9,800   St Francis Medical Center 1995 Ser E (MBIA)..........        4.00       01/08/97        9,800,000
     9,000   St Joseph Health System Ser 1991 B...................        5.10       01/02/97        9,000,000
     4,000   Scripps Memorial Hospital Ser 1991 B (MBIA)..........        3.95       01/08/97        4,000,000
    10,800   Sutter/California Healthcare System Ser 1996 B.......        5.10       01/02/97       10,800,000
           California Pollution Control Financing Authority,
     1,615   Chevron USA Ser 1983.................................        3.90       11/15/97        1,618,814
     5,000   Chevron USA Ser 1984 B...............................        3.70       06/16/97        5,001,181
     3,400   Noranda-Grey Eagle Mines Inc Ser 1985 C..............        3.60       01/08/97        3,400,000
     6,300   Pacific Gas & Electric Co 1996 Ser F.................        4.80       01/02/97        6,300,000
    10,000 California Public Capital Improvements Financing
             Authority, Pooled Ser 1988 C.........................        3.65       03/17/97       10,000,000
           California Statewide Communities Development Authority,
     6,000   Kaiser Permanente Ser 1995 COPs......................        4.00       01/08/97        6,000,000
     4,500   St Joseph Health System COPs.........................        5.10       01/02/97        4,500,000
     5,000 Foothill/Eastern Transportation Corridor Agency, Toll
             Road Ser 1995 C......................................        3.90       01/08/97        5,000,000
     5,000 Long Beach, Memorial Health Services Ser 1991..........        4.00       01/08/97        5,000,000
     5,900 Los Angeles, Multi-family 1985 Ser K...................        3.55       01/08/97        5,900,000
     5,000 Los Angeles County Metropolitan Transportation
             Authority, Prop C Sales Tax Refg Ser 1993 A (MBIA)...        4.00       01/08/97        5,000,000
    10,600 Newport Beach, Hoag Memorial Hospital/Presbyterian 1992
             Ser A................................................        5.15       01/02/97       10,600,000
     5,000 Riverside County, 1996-1997 Ser B TRANs................        3.90       01/08/97        5,000,000
     9,000 Sacramento County, Administration Center & Courthouse
             Ser 1990 COPs........................................        3.75       01/08/97        9,000,000
     5,000 San Diego, Lusk Mira Mesa Apts Issue E 1985............        4.05       01/08/97        5,000,000
     6,600 San Jose - Santa Clara Clean Water Financing Authority,
             Sewer Ser 1995 B (FGIC)..............................        3.85       01/08/97        6,600,000
     2,100 Santa Clara County Financing Authority, Valley Medical
             Center 1994 Ser B....................................        4.00       01/08/97        2,100,000
     4,000 Southern California Public Power Authority,
             Transmission Ser 1996 B (FSA)........................        4.00       01/08/97        4,000,000
     1,300 Puerto Rico Highway & Transportation, Ser X............        3.75       01/08/97        1,300,000
                                                                                               ---------------
           TOTAL CALIFORNIA TAX-EXEMPT SHORT-TERM VARIABLE RATE MUNICIPAL OBLIGATIONS
           (AMORTIZED COST $160,319,995).....................................................      160,319,995
                                                                                               ---------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       27
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
PORTFOLIO OF INVESTMENTS DECEMBER 31, 1996, CONTINUED
 
<TABLE>
<CAPTION>
                                                                                               YIELD TO
 PRINCIPAL                                                                                     MATURITY
 AMOUNT IN                                                            COUPON      MATURITY      ON DATE
 THOUSANDS                                                             RATE         DATE      OF PURCHASE        VALUE
- ---------------------------------------------------------------------------------------------------------------------------
<C>        <S>                                                      <C>          <C>         <C>            <C>
           CALIFORNIA TAX-EXEMPT COMMERCIAL PAPER (28.8%)
           California Pollution Control Financing Authority,
 $   3,000   Southern California Edison Co Ser B 1985.............        3.40%    02/06/97        3.40%    $     3,000,000
     4,100   Southern California Edison Co Ser D 1985.............        3.35     03/13/97        3.35           4,100,000
           East Bay Municipal Utility District,
     3,000   Water System.........................................        3.40     01/23/97        3.40           3,000,000
     6,000   Water System.........................................        3.40     01/29/97        3.40           6,000,000
     4,000   Water System.........................................        3.35     02/25/97        3.35           4,000,000
           Metropolitan Water District of Southern California,
     5,000   Ser 1991.............................................        3.55     02/12/97        3.55           5,000,000
     6,100   Ser 1991.............................................        3.55     02/18/97        3.55           6,100,000
     4,500   Ser B................................................        3.45     03/11/97        3.45           4,500,000
           San Diego,
     4,000   San Diego Gas & Electric Co Ser 1995 A...............        3.55     01/31/97        3.55           4,000,000
     3,500   San Diego Gas & Electric Co Ser 1995 B...............        3.45     02/13/97        3.45           3,500,000
           San Diego County Water Authority,
     5,000   Ser # 1..............................................        3.60     02/19/97        3.60           5,000,000
     5,500   Ser # 1..............................................        3.40     02/26/97        3.40           5,500,000
     5,000 University of California Regents, Ser A................        3.50     02/27/97        3.50           5,000,000
           West & Central Basin Financing Authority,
     3,000   West Basin Municipal Water District TRANs............        3.40     02/11/97        3.40           3,000,000
     3,000   West Basin Municipal Water District TRANs............        3.50     02/11/97        3.50           3,000,000
           Puerto Rico Government Development Bank,
     5,000   Ser 1996.............................................        3.45     02/07/97        3.45           5,000,000
     5,000   Ser 1996.............................................        3.35     03/12/97        3.35           5,000,000
                                                                                                            ---------------
           TOTAL CALIFORNIA TAX-EXEMPT COMMERCIAL PAPER
           (AMORTIZED COST $74,700,000)...................................................................       74,700,000
                                                                                                            ---------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       28
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
PORTFOLIO OF INVESTMENTS DECEMBER 31, 1996, CONTINUED
 
<TABLE>
<CAPTION>
                                                                                               YIELD TO
 PRINCIPAL                                                                                     MATURITY
 AMOUNT IN                                                            COUPON      MATURITY      ON DATE
 THOUSANDS                                                             RATE         DATE      OF PURCHASE        VALUE
- ---------------------------------------------------------------------------------------------------------------------------
<C>        <S>                                                      <C>          <C>         <C>            <C>
           CALIFORNIA TAX-EXEMPT SHORT-TERM MUNICIPAL NOTES (10.0%)
 $   7,000 Contra Costa County, 1996-97 TRANs, dtd 07/01/96.......        4.50%    07/03/97       3.755%    $     7,025,251
     5,000 Riverside County, 1996-97 Ser A TRANs, dtd 07/01/96....        4.50     06/30/97        3.90           5,014,217
     5,000 San Bernadino County, 1996-1997 TRANs, dtd 07/01/96....        4.50     06/30/97       3.875           5,014,835
     4,000 San Diego, 1996-1997 Ser A TANs, dtd 07/02/96..........        4.50     07/02/97        3.75           4,014,400
     5,000 Ventura County, Ser 1996 TRANs, dtd 07/02/96...........        4.75     07/02/97        3.85           5,021,591
                                                                                                            ---------------
           TOTAL CALIFORNIA TAX-EXEMPT SHORT-TERM MUNICIPAL NOTES
           (AMORTIZED COST $26,090,294)...................................................................       26,090,294
                                                                                                            ---------------
            TOTAL INVESTMENTS
            (AMORTIZED COST $261,110,289) (A)......................     100.6       261,110,289
            LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS.........      (0.6)       (1,519,943)
                                                                        -----      ------------
            NET ASSETS.............................................     100.0%     $259,590,346
                                                                        -----      ------------
                                                                        -----      ------------
<FN>
- ---------------
COPs   Certificates of Participation.
TANs   Tax Anticipation Notes.
TRANs  Tax and Revenue Anticipation Notes.
  +    Rate shown is 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:
FGIC   Financial Guaranty Insurance Company.
 FSA   Financial Security Assurance Inc.
MBIA   Municipal Bond Investors Assurance Corporation.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       29
<PAGE>
DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME TRUST
REPORT OF INDEPENDENT ACCOUNTANTS
 
TO THE SHAREHOLDERS AND TRUSTEES
OF DEAN WITTER CALIFORNIA TAX-FREE DAILY INCOME 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 California Tax-Free Daily Income
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 eight years in
the period then ended and for the period July 22, 1988 (commencement of
operations) through December 31, 1988, 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 $0.026 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.
 
                                       30
<PAGE>
                        THE DEAN WITTER FAMILY OF FUNDS
 
<TABLE>
<S>                                                        <C>
MONEY MARKET FUNDS                                         DEAN WITTER RETIREMENT SERIES
Dean Witter Liquid Asset Fund Inc.                         Liquid Asset Series
Dean Witter U.S. Government Money Market Trust             U.S. Government Money Market Series
Dean Witter Tax-Free Daily Income Trust                    U.S. Government Securities Series
Dean Witter California Tax-Free Daily Income Trust         Intermediate Income Securities Series
Dean Witter New York Municipal Money Market Trust          American Value Series
EQUITY FUNDS                                               Capital Growth Series
Dean Witter American Value Fund                            Dividend Growth Series
Dean Witter Natural Resource Development Securities Inc.   Stategist Series
Dean Witter Dividend Growth Securities Inc.                Utilities Series
Dean Witter Developing Growth Securities Trust             Value-Added Market Series
Dean Witter World Wide Investment Trust                    Global Equity Series
Dean Witter Value-Added Market Series                      ASSET ALLOCATION FUNDS
Dean Witter Utilities Fund                                 Dean Witter Strategist Fund
Dean Witter Capital Growth Securities                      Dean Witter Global Asset Allocation Fund
Dean Witter European Growth Fund Inc.                      ACTIVE ASSETS ACCOUNT PROGRAM
Dean Witter Precious Metals and Minerals Trust             Active Assets Money Trust
Dean Witter Pacific Growth Fund Inc.                       Active Assets Tax-Free Trust
Dean Witter Health Sciences Trust                          Active Assets California Tax-Free Trust
Dean Witter Global Dividend Growth Securities              Active Assets Government Securities Trust
Dean Witter Global Utilities Fund
Dean Witter International SmallCap Fund
Dean Witter Mid-Cap Growth Fund
Dean Witter Balanced Growth Fund
Dean Witter Capital Appreciation Fund
Dean Witter Information Fund
Dean Witter Japan Fund
Dean Witter Income Builder Fund
Dean Witter Special Value Fund
Dean Witter Financial Services Trust
FIXED-INCOME FUNDS
Dean Witter High Yield Securities Inc.
Dean Witter Tax-Exempt Securities Trust
Dean Witter U.S. Government Securities Trust
Dean Witter Federal Securities Trust
Dean Witter Convertible Securities Trust
Dean Witter California Tax-Free Income Fund
Dean Witter New York Tax-Free Income Fund
Dean Witter World Wide Income Trust
Dean Witter Intermediate Income Securities
Dean Witter Global Short-Term Income Fund Inc.
Dean Witter Multi-State Municipal Series Trust
Dean Witter Premier Income Trust
Dean Witter Short-Term U.S. Treasury Trust
Dean Witter Diversified Income Trust
Dean Witter Limited Term Municipal Trust
Dean Witter Short-Term Bond Fund
Dean Witter High Income Securities
Dean Witter National Municipal Trust
Dean Witter Balanced Income Fund
Dean Witter Hawaii Municipal Trust
Dean Witter Intermediate Term U.S. Treasury Trust
</TABLE>
 
<PAGE>
 
Dean Witter California
Tax-Free Daily Income Trust         Dean Witter
Two World Trade Center              California Tax-Free
New York, New York 10048
TRUSTEES                            Daily Income Trust
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Dr. Manuel H. Johnson
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
 
OFFICERS
Charles A. Fiumefreddo
Chairman and Chief Executive
Officer
Barry Fink
Vice President, Secretary and
General Counsel
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 25, 1997
<PAGE>
STATEMENT OF ADDITIONAL INFORMATION                          DEAN WITTER
FEBRUARY 25, 1997                                            CALIFORNIA TAX-FREE
                                                              DAILY INCOME TRUST
 
- --------------------------------------------------------------------------------
 
    Dean  Witter  California  Tax-Free Daily  Income  Trust (the  "Fund")  is an
open-end, diversified management investment  company whose investment  objective
is to provide as high a level of daily income exempt from federal and California
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  with
Dean  Witter  Distributors  Inc. 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 25, 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 telephone numbers listed
below  or from  the Fund's Distributor,  Dean Witter Distributors,  Inc. or from
Dean Witter  Reynolds Inc.  at  any of  its branch  offices  or from  any  other
Selected  Broker-Dealer.  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 California Tax-Free Daily Income 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......................................................         11
 
Investment Restrictions................................................................         15
 
Portfolio Transactions and Brokerage...................................................         16
 
Purchase of Fund Shares................................................................         20
 
Redemption of Fund Shares..............................................................         29
 
Dividends, Distributions and Taxes.....................................................         30
 
Description of Shares..................................................................         33
 
Custodian and Transfer Agent...........................................................         33
 
Independent Accountants................................................................         34
 
Reports to Shareholders................................................................         34
 
Legal Counsel..........................................................................         34
 
Experts................................................................................         34
 
Registration Statement.................................................................         34
 
Financial Statements...................................................................         34
 
Appendix...............................................................................         35
</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
April  25,  1988 under  the name  "Dean  Witter/Sears California  Tax-Free Daily
Income Trust." On February 19, 1993,  the Trust Agreement was amended to  change
the Fund's name to Dean Witter California Tax-Free Daily Income 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
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.,  a  Delaware corporation,  (the "Investment
Manager" or "InterCapital"), whose address is Two World Trade Center, New  York,
New York 10048, is the Fund's Investment Manager. InterCapital is a wholly-owned
subsidiary  of Dean Witter, Discover Co. ("DWDC"), a Delaware corporation. In an
internal reorganization which took place in January, 1993, InterCapital  assumed
the  investment  advisory, administrative  and management  activities previously
performed by the InterCapital Division of Dean Witter Reynolds, Inc. ("DWR"),  a
broker-dealer  affiliate of InterCapital. (As hereinafter used in this Statement
of Additional  Information, the  terms "InterCapital"  and "Investment  Manager"
refer  to DWR's  InterCapital Division prior  to the 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 by the Fund's Trustees. Information as  to
these  Trustees  and  Officers  is contained  under  the  caption  "Trustees and
Officers."
 
    InterCapital is also  the investment  manager or investment  adviser of  the
following investment companies: Dean Witter Liquid Asset Fund Inc., InterCapital
Income  Securities Inc.,  Dean Witter  High Yield  Securities Inc.,  Dean Witter
Tax-Free Daily Income  Trust, Dean  Witter Developing  Growth Securities  Trust,
Dean  Witter American Value  Fund, Dean Witter  Dividend Growth Securities Inc.,
Dean Witter  Natural  Resource Development  Securities  Inc., Dean  Witter  U.S.
Government Money Market Trust, Dean Witter California Tax-Free Income Fund, Dean
Witter Variable Investment Series, Dean Witter World-Wide Investment Trust, Dean
Witter   Select  Municipal  Reinvestment  Fund,   Dean  Witter  U.S.  Government
Securities Trust,  Dean  Witter  New  York Tax-Free  Income  Fund,  Dean  Witter
Convertible  Securities Trust, Dean Witter Federal Securities Trust, Dean Witter
Value-Added Market Series,  High Income Advantage  Trust, High Income  Advantage
Trust  II, High Income Advantage Trust III, Dean Witter Government Income Trust,
Dean Witter Tax-Exempt Securities Trust, Dean Witter Utilities Fund, Dean Witter
Strategist Fund, Dean Witter World  Wide Income Trust, Dean Witter  Intermediate
Income  Securities, Dean Witter Capital  Growth Securities, Dean Witter European
Growth Fund Inc.,  Dean Witter Pacific  Growth Fund Inc.,  Dean Witter  Precious
Metals  and Minerals Trust, Dean Witter Global Short-Term Income Fund Inc., Dean
Witter Multi-State Municipal Series Trust, Dean Witter New York Municipal  Money
Market  Trust,  InterCapital  Quality Municipal  Investment  Trust,  Dean Witter
Premier Income Trust, Dean Witter  Short-Term U.S. Treasury Trust,  InterCapital
Insured Municipal Bond Trust, InterCapital Insured Municipal Trust, InterCapital
Quality  Municipal  Income Trust,  Dean  Witter Diversified  Income  Trust, Dean
Witter Health  Sciences  Trust,  Dean  Witter  Retirement  Series,  InterCapital
Quality   Municipal  Securities,   InterCapital  California   Quality  Municipal
Securities, InterCapital  New York  Quality  Municipal Securities,  Dean  Witter
Global  Dividend Growth  Securities, Dean  Witter Limited  Term Municipal Trust,
Dean Witter Short-Term Bond Fund, 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 Global
Asset  Allocation Fund,  Dean Witter  Select Dimensions  Investment Series, Dean
Witter Balanced  Growth Fund,  Dean  Witter Balanced  Income Fund,  Dean  Witter
Hawaii  Municipal  Trust, Dean  Witter  Capital Appreciation  Fund,  Dean Witter
Intermediate Term U.S. Treasury Trust, Dean Witter Information Fund, Dean Witter
Japan Fund, Dean  Witter Income Builder  Fund, Dean Witter  Special Value  Fund,
Dean Witter Financial Services Trust, InterCapital Insured Municipal Securities,
InterCapital
 
                                       3
<PAGE>
Insured  California Municipal Securities,  InterCapital Insured Municipal Income
Trust, InterCapital  California Insured  Municipal Income  Trust, Active  Assets
Money  Trust, Active  Assets California  Tax-Free Trust,  Active Assets Tax-Free
Trust, Active  Assets  Government  Securities  Trust,  Municipal  Income  Trust,
Municipal  Income  Trust  II,  Municipal  Income  Trust  III,  Municipal  Income
Opportunities Trust, Municipal Income  Opportunities Trust II, Municipal  Income
Opportunities  Trust III, Municipal Premium Income Trust and Prime Income Trust.
The foregoing investment  companies, together  with the  Fund, are  collectively
referred to as the Dean Witter Funds.
 
    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 Term Trust 2000, TCW/DW Term Trust 2002, TCW/DW Term Trust
2003, TCW/DW Mid-Cap Equity Trust, TCW/DW Global Telecom Trust, TCW/DW Strategic
Income  Trust,  TCW/DW Emerging  Markets Opportunities  Trust, and  TCW/DW Total
Return Trust (the "TCW/DW Funds"). InterCapital also serves as: (i)  sub-adviser
to  Templeton Global Opportunities  Trust, an open-end  investment company; (ii)
administrator  of  The  BlackRock  Strategic  Term  Trust  Inc.,  a   closed-end
investment  company;  and  (iii) sub-administrator  of  MassMutual Participation
Investors and Templeton Global  Governments Income Trust, closed-end  investment
companies.
 
    Pursuant  to an Investment  Management Agreement (the  "Agreement") with the
Investment Manager, the Fund has retained  the Investment Manager to manage  the
investment  of  the  Fund's assets,  including  the  placing of  orders  for the
purchase and sale of  portfolio securities. The  Investment Manager obtains  and
evaluates  such  information  and  advice relating  to  the  economy, securities
markets, and  specific  securities  as  it  considers  necessary  or  useful  to
continuously  manage the  assets of  the Fund  in a  manner consistent  with its
investment objective.
 
    Under the  terms  of the  Agreement,  in  addition to  managing  the  Fund's
investments,  the Investment Manager  maintains certain of  the Fund's books and
records and  furnishes,  at its  own  expense, such  office  space,  facilities,
equipment,  clerical  help,  bookkeeping  and legal  services  as  the  Fund may
reasonably require in the conduct of its business, including the preparation  of
prospectuses, 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.
 
    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 Distributors  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  Fund  and supplements  thereto  to  the  Fund's
shareholders; all expenses of shareholders' and Trustees'
 
                                       4
<PAGE>
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 each business day: 0.50%  of the portion of the daily net  assets
not  exceeding  $500 million;  0.425% of  the  portion of  the daily  net assets
exceeding $500 million but not exceeding $750 million; 0.375% of the portion  of
the  daily net assets exceeding $750 million but not exceeding $1 billion; 0.35%
of the portion of the  daily net assets exceeding  $1 billion but not  exceeding
$1.5  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.
The  Fund  accrued  to  the   Investment  Manager  $1,290,675,  $1,153,594   and
$1,326,761, in total compensation under the Agreement for the fiscal years ended
December 31, 1994, 1995 and 1996, 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 June  20,
1988  and by DWR, as the then sole  shareholder, on June 22, 1988. The Agreement
may be terminated at  any time, without  penalty, on thirty  days notice by  the
Trustees  of the Fund, by the  holders of a majority, as  defined in 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). 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 provides  that it  will continue  in effect  from year  to year  thereafter,
provided  continuance of the Agreement is approved at least annually by the vote
of the holders of a majority (as  defined in the Act) of the outstanding  shares
of  the Fund, or by the  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  or "interested
persons" (as defined in the Act) of any such party (the "Independent Trustees"),
which vote must be cast in person at a meeting called for the purpose of  voting
on  such approval. At their meeting held on  April 17, 1996, the Fund's Board of
Trustees, including a majority  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  Agreement  is   terminated,  or  if  the  affiliation   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  the
c/o Levitz Furniture Corporation               Dean  Witter Funds; formerly President and Chief Executive Officer
6111 Broken Sound Parkway, N.W.                of  Hills  Department  Stores  (May,  1991-July,  1995);  formerly
Boca Raton, Florida                            variously  Chairman, Chief Executive  Officer, President and Chief
                                               Operating Officer (1987-1991)  of the Sears  Merchandise Group  of
                                               Sears,  Roebuck and Co.; Director of Eaglemark Financial Services,
                                               Inc., the United Negro College Fund and Weirton Steel Corporation.
Charles A. Fiumefreddo* (63) ................  Chairman, Chief Executive  Officer and  Director of  InterCapital,
Chairman of the Board,                         Distributors  and DWSC;  Executive Vice President  and Director or
President, Chief Executive Officer             DWR; Chairman, Director or Trustee, President and Chief  Executive
 and Trustee                                   Officer  of  the  Dean  Witter  Funds;  Chairman,  Chief Executive
Two World Trade Center                         Officer and Trustee of the TCW/DW Funds; Chairman and Director  of
New York, New York                             Dean  Witter Trust  Company ("DWTC");  Director and/or  officer of
                                               various DWDC subsidiaries; formerly,  Director and Executive  Vice
                                               President of DWDC (until February, 1993).
Edwin J. Garn (64) ..........................  Director  or  Trustee of  the Dean  Witter Funds;  formerly United
Trustee                                        States Senator (R-Utah) (1974-1992)  and Chairman, Senate  Banking
c/o Huntsman Chemical Corporation              Committee  (1980-1986);  formerly Mayor  of  Salt Lake  City, Utah
500 Huntsman Way                               (1971-1974); formerly  Astronaut, Space  Shuttle Discovery  (April
Salt Lake City, Utah                           12-19,  1985); Vice Chairman, Huntsman Chemical Corporation (since
                                               January,  1993);  Director  of  Franklin  Quest  (time  management
                                               systems)  and John Alden  Financial Corp.; member  of the board of
                                               various civic and charitable organizations.
 
John R. Haire (72) ..........................  Chairman of the Audit Committee  and Chairman of the Committee  of
Trustee                                        Independent  Directors  or Trustees  of  each of  the  Dean Witter
Two World Trade Center                         Funds; and Director or Trustee of the Dean Witter Funds;  Chairman
New York, New York                             of  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).
</TABLE>
 
                                       6
<PAGE>
<TABLE>
<CAPTION>
  NAME, AGE, POSITION WITH FUND AND ADDRESS               PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ---------------------------------------------  ------------------------------------------------------------------
<S>                                            <C>
Dr. Manuel H. Johnson (48) ..................  Senior Partner, Johnson  Smick International,  Inc., a  consulting
Trustee                                        firm;  Koch Professor  of International Economics  and Director of
c/o Johnson Smick International Inc.           the Center for Global Market  Studies at George Mason  University;
1133 Connecticut Avenue, N.W.                  Co-Chairman  and a founder of the Group of Seven Council (G7C), an
Washington, DC                                 international economic commission; Director or Trustee of the Dean
                                               Witter Funds;  Trustee of  the TCW/DW  Funds; Director  of  NASDAQ
                                               (since  June, 1995);  Director of  Greenwich Capital  Markets Inc.
                                               (broker-dealer); formerly Vice Chairman of the Board of  Governors
                                               of  the Federal Reserve System (1986-1990) and Assistant Secretary
                                               of the U.S. Treasury (1982-1986).
 
Michael E. Nugent (60) ......................  General Partner,  Triumph  Capital,  L.P.,  a  private  investment
Trustee                                        partnership;  Director or  Trustee of  the Dean  Witter Funds, and
c/o Triumph Capital, L.P.                      Trustee of  the TCW/DW  Funds;  formerly Vice  President,  Bankers
237 Park Avenue                                Trust  Company and BT Capital Corporation (1984-1988); Director of
New York, New York                             various business organizations.
 
Philip J. Purcell* (53) .....................  Chairman of the Board of Directors and Chief Executive Officer  of
Trustee                                        DWDC,   DWR   and  Novus   Credit   Services  Inc.;   Director  of
Two World Trade Center                         InterCapital, DWSC and  Distributors; Director or  Trustee of  the
New York, New York                             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  of
Trustee                                        the TCW/DW Funds; Director of Citizens Utilities Company; formerly
c/o Gordon Altman Butowsky Weitzen             Executive  Vice President and Chief Investment Officer of the Home
 Shalov & Wein                                 Insurance Company  (August,  1991-September, 1995);  and  formerly
Counsel to the Independent Trustees            Chairman  and Chief Investment  Officer of Axe-Houghton Management
114 West 47th Street                           and the Axe-Houghton Funds (1983-1991).
New York, New York
 
Barry Fink (42) .............................  First Vice President (since June, 1993) and Secretary and  General
Vice President, Secretary                      Counsel  (since February,  1997) of  InterCapital and  DWSC; First
and General Counsel                            Vice President, Assistant Secretary and Assistant General  Counsel
Two World Trade Center                         of Dean Witter Distributors Inc. (since February, 1997); Assistant
New York, New York                             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  Dean
Vice President                                 Witter Funds.
Two World Trade Center
New York, New York
 
Thomas F. Caloia (50) .......................  First Vice President and Assistant Treasurer (since January, 1993)
Treasurer                                      of  InterCapital and DWSC  and Treasurer of  the Dean Witter Funds
Two World Trade Center                         and TCW/DW Funds.
New York, New York
<FN>
- ------------
 *Denotes Trustees who are "interested persons"  of the Fund, as defined in  the
  Act.
</TABLE>
 
                                       7
<PAGE>
   
    In  addition, Robert  M. Scanlan, President  and Chief  Operating Officer of
InterCapital and DWSC,  Executive Vice  President of Distributors  and DWTC  and
Director  of  DWTC,  Joseph  J. McAliden,  Executive  Vice  President  and Chief
Investment  Officer  of  InterCapital,  and  Director  of  DWTC  and  Robert  S.
Giambrone,  Senior Vice President  of InterCapital, DWSC,  Distributors and DWTC
and a Director of DWTC  and Peter M. Avelar,  James F. Willison, Joseph  Arcieri
and  Jonathan R.  Page, Senior  Vice Presidents  of InterCapital,  and Gerard J.
Lian, Vice  President 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 LouAnne 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'  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
 
                                       8
<PAGE>
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 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.
 
                                       9
<PAGE>
    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.
 
           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
 
                                       10
<PAGE>
Fund)  for  the  year ended  December  31,  1996, and  the  estimated retirement
benefits for the Fund's Independent Trustees, to commence upon their retirement,
from the Fund as of December  31, 1996 and from the  57 Dean Witter Funds as  of
December 31, 1996.
 
          RETIREMENT BENEFITS FROM THE FUND AND ALL DEAN WITTER FUNDS
 
<TABLE>
<CAPTION>
                                          FOR ALL ADOPTING FUNDS                                     ESTIMATED ANNUAL
                                  --------------------------------------   RETIREMENT BENEFITS           BENEFITS
                                       ESTIMATED                           ACCRUED AS EXPENSES      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, repurchase
agreements and  non-California  tax-exempt securities.  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-California  tax-exempt securities which satisfy  the
standards  established for California tax-exempt  securities may be purchased by
the Fund.
 
    In addition, the  Fund may  temporarily invest more  than 20%  of its  total
assets   in  non-California  tax-exempt  securities  and  taxable  money  market
instruments, or  in  short-term tax-exempt  securities  subject to  the  federal
alternative  minimum tax for individual  shareholders, to maintain a "defensive"
posture when, in the opinion of the Investment Manager, it is advisable to do so
because of market conditions. The types  of taxable 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.
 
                                       11
<PAGE>
    TAX-EXEMPT SECURITIES.  As discussed in the Prospectus, at least 80% of  the
Fund's  total  assets  will  be  invested  in  California  tax-exempt securities
(California Municipal Bonds, California Municipal Notes and California Municipal
Commercial Paper). 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  California Municipal  Bonds
must  be, in the opinion of bond counsel, exempt from California 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  California  Municipal Notes  must  be,  in the  opinion  of  bond
counsel,  exempt from  California 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  California Commercial  Paper  must be,  in  the opinion  of bond
counsel, exempt  from California  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 to be  paid from general
revenues of the municipality  or refinanced with long-term  debt. In most  cases
Municipal  Commercial Paper is backed by  letters of credit, lending agreements,
note repurchase agreements or other credit facility agreements offered by  banks
or other institutions.
 
    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
 
                                       12
<PAGE>
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
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  Municipal  Obligation  is
adjusted  either  at predesignated  periodic  intervals and  on  "floating rate"
Municipal Obligations 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  Municipal 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  Municipal Obligations  could
enhance  the ability of the Fund to maintain  a stable net asset value per share
(see "Purchase  of  Fund  Shares--Determination  of  Net  Asset  Value"  in  the
Prospectus).  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  a  Municipal Obligation  prior to
maturity, is enhanced.
 
    WHEN-ISSUED AND DELAYED DELIVERY SECURITIES.   As stated in the  Prospectus,
the Fund may purchase tax-exempt securities on a when-issued or delayed delivery
basis.  When such transactions are negotiated, the price is fixed at the time of
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 liquid  portfolio securities  equal in  value to  commitments for  such
when-issued  or delayed delivery securities. The  Fund does not believe that its
net asset  value  or  income will  be  adversely  affected by  its  purchase  of
 
                                       13
<PAGE>
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, 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  California  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
 
                                       14
<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. During  the  fiscal year  ended  December 31,  1996,  the Fund  did  not
purchase any put options.
 
    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  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 or net
assets does not require elimination of any security from the portfolio.
 
                                       15
<PAGE>
    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 loans of  money or securities, except:  (a) by the purchase  of
    debt obligations in which the Fund may invest consistent with its investment
    objective and policies; and (b) by investment in repurchase agreements.
 
        12. Make short sales of securities.
 
        13.  Purchase securities on margin, except  for such short-term loans as
    are necessary for the clearance of purchases of portfolio securities.
 
        14. Engage in the underwriting of securities, except insofar as the Fund
    may be deemed an underwriter under  the Securities Act of 1933 in  disposing
    of a portfolio security.
 
        15.  Invest for the  purpose of exercising control  or management of any
    other issuer.
 
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.
 
                                       16
<PAGE>
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  Fund's
fiscal  years ended December 31,  1994, 1995 and 1996, the  Fund did not pay any
brokerage commissions on agency transactions.
 
    The Investment Manager currently serves as investment manager to a number of
clients, including other  investment companies,  and may  in the  future act  as
investment  manager or adviser to  others. It is the  practice of the Investment
Manager to cause purchase and sale  transactions to be allocated among the  Fund
and  others whose  assets it manages  in such  manner as it  deems equitable. In
making such  allocations  among the  Fund  and other  client  accounts,  various
factors  may be considered, including  the respective investment objectives, the
relative size of portfolio  holdings of the same  or comparable securities,  the
availability  of  cash  for  investment,  the  size  of  investment  commitments
generally held and  the opinions  of the  persons responsible  for managing  the
portfolios of the Fund and other client accounts. In the case of certain initial
and  secondary public offerings,  the Investment Manager  may utilize a pro-rata
allocation process based on the size of  the Dean Witter Funds involved and  the
number of shares available from the public offering.
 
    The  policy of the Fund, regarding purchases and sales of securities 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.
 
    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
 
                                       17
<PAGE>
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 CALIFORNIA TAX-EXEMPT SECURITIES
 
    The  Fund  will  be  affected  by  any  political,  economic  or  regulatory
developments  affecting the  ability of  California issuers  to pay  interest or
repay principal. Various developments regarding the California Constitution  and
State  statutes  which limit  the taxing  and  spending authority  of California
governmental entities may impair the  ability of California issuers to  maintain
debt service on their obligations.
 
    In  1978, Proposition 13,  an amendment to  the California Constitution, was
approved, limiting real  property valuation  for property tax  purposes and  the
power  of local governments to increase  real property tax revenues and revenues
from other  sources.  Legislation  adopted after  Proposition  13  provided  for
assistance   to  local   governments,  including   the  redistribution   of  the
then-existing surplus in  the General  Fund, reallocation of  revenues to  local
governments,   and  assumption  by   the  State  of   certain  local  government
obligations. However,  more recent  legislation reduced  such state  assistance.
There  can  be no  assurance that  any particular  level of  State aid  to local
governments will  be maintained  in future  years. In  NORDLINGER V.  HAHN,  the
United  States Supreme Court upheld certain provisions of Proposition 13 against
claims that it violated the equal protection clause of the Constitution.
 
    In 1979,  an  amendment  was  passed  adding  Article  XIIIB  to  the  State
Constitution.  As  amended in  1990,  Article XIIIB  imposes  an "appropriations
limit" on the spending authority of the State and local government entities.  In
general,  the appropriations limit  is based on  certain 1978-1979 expenditures,
adjusted annually  to reflect  changes in  the cost  of living,  population  and
certain   services   provided   by   State   and   local   government  entities.
"Appropriations limit"  does not  include appropriations  for qualified  capital
outlay  projects, certain increases in transportation-related taxes, and certain
emergency appropriations.
 
    If a government entity raises revenues beyond its "appropriations limit"  in
any  year,  a portion  of the  excess  which cannot  be appropriated  within the
following year's limit  must be returned  to the entity's  taxpayers within  two
subsequent  fiscal  years,  generally  by  a  tax  credit,  refund  or temporary
suspension of tax rates or fee schedules. "Debt service" is excluded from  these
limitations,  and  is defined  as "appropriations  required to  pay the  cost of
interest and redemption charges, including the funding of any reserve or sinking
fund required  in  connection therewith,  on  indebtedness existing  or  legally
 
                                       18
<PAGE>
authorized  as of January 1, 1979  or on bonded indebtedness thereafter approved
[by the voters]." In addition, Article  XIIIB requires the State Legislature  to
establish  a prudent State reserve, and to require the transfer of 50% of excess
revenue to the State School Fund; any amounts allocated to the State School Fund
will increase the appropriations limit.
 
    In June 1982,  the voters of  California passed two  initiative measures  to
repeal  the  California gift  and inheritance  tax  laws and  to enact,  in lieu
thereof, California death  taxes. California  voters also  passed an  initiative
measure  to increase, for taxable years commencing  on or after January 1, 1982,
the amount to account for the effects of inflation. Decreases in State and local
revenues in future fiscal years as a consequence of these initiatives may result
in reductions in allocations of state  revenues to California issuers or in  the
ability of California issuers to pay their obligations.
 
    In   1986,  California  voters  approved  an  initiative  statute  known  as
Proposition  62.  This  initiative  (i)  requires  that  any  tax  for   general
governmental  purposes imposed by local governments be approved by resolution or
ordinance adopted by a two-thirds vote of the governmental entity's  legislative
body  and by a majority vote of  the electorate of the governmental entity, (ii)
requires that any  special tax  (defined as tax  levied for  other than  general
governmental  purposes) imposed by a local  governmental entity be approved by a
two-thirds vote of the voters within that jurisdiction, (iii) restricts the  use
of  revenues from a special tax to the purposes or for the service for which the
special tax was imposed,  (iv) prohibits the imposition  of ad valorem taxes  on
real  property  by  local  governmental  entities  except  as  permitted  by the
Proposition 13 amendment, (v) prohibits the imposition of transaction taxes  and
sales  taxes on the  sale of real  property by local  governments, (vi) requires
that any  tax imposed  by a  local government  on or  after August  1, 1985,  be
ratified  by a majority vote of the  electorate within two years of the adoption
of the initiative or be terminated by November 15, 1989, (vii) requires that, in
the event  a  local government  fails  to comply  with  the provisions  of  this
measure,  a reduction of  the amount of  property tax revenue  allocated to such
local government occurs  in an  amount equal to  the revenues  received by  such
entity attributable to the tax levied in violation of the initiative, and (viii)
permits these provisions to be amended exclusively by the voters of the State of
California.
 
    In September 1995, the California Supreme Court upheld the constitutionality
of  Proposition 62,  creating uncertainty  as to  the legality  of certain local
taxes enacted by non-charter cities in California without voter approval. It  is
not possible to predict the impact of the decision.
 
    In November 1996, California voters approved Proposition 218. The initiative
applied  the provisions  of Proposition  62 to  all entities,  including charter
cities. It requires that all taxes for general purposes obtain a simple majority
popular vote and that  taxes for special purposes  obtain a two-thirds  majority
vote.  Prior to the effectiveness of  Proposition 218, charter cities could levy
certain taxes such as transient occupancy taxes and utility user's taxes without
a popular  vote.  Proposition  218  will  also  limit  the  authority  of  local
governments  to impose property-related assessments, fees and charges, requiring
that  such  assessments  be  limited  to  the  special  benefit  conferred   and
prohibiting  their use for  general governmental services.  Proposition 218 also
allows  voters   to   use  their   initiative   power  to   reduce   or   repeal
previously-authorized taxes, assessments, fees and charges.
 
    In  1988, State voters approved Proposition 87, which amended Article XVI of
the  State  Constitution  to  authorize   the  State  Legislature  to   prohibit
redevelopment  agencies  from  receiving  any property  tax  revenues  raised by
increased property taxes to repay bonded indebtedness of local government  which
is  not approved by voters on  or before January 1, 1989.  It is not possible to
predict whether the State Legislature will  enact such a prohibition, nor is  it
possible  to predict the impact of  Proposition 87 on redevelopment agencies and
their ability to make payments on outstanding debt obligations.
 
    In November 1988, California voters approved Proposition 98. This initiative
requires that (i) revenues in excess of amounts permitted to be spent and  which
would  otherwise  be returned  by revision  of  tax rates  or fee  schedules, be
transferred and allocated (up to a maximum of 40%) to the State School Fund  and
be expended solely for purposes of instructional improvement and accountability.
No  such transfer or allocation of funds  will be required if certain designated
state officials determine that annual  student expenditures and class size  meet
certain    criteria   as    set   forth    in   Proposition    98.   Any   funds
 
                                       19
<PAGE>
allocated to the State  School Fund shall cause  the appropriation limits to  be
annually  increased for any such allocation  made in the prior year. Proposition
98 also requires the State of California  to provide a minimum level of  funding
for  public schools and community colleges. The initiative permits the enactment
of legislation, by a two-thirds vote, to suspend the minimum funding requirement
for one year.
 
    On November 3, 1992, voters approved an initiative statute, Proposition 163,
which exempts certain food products, including candy and other snack foods, from
California's sales tax. The sales tax had been broadened to include those  items
as  part  of  the  1991-92 budget  legislation.  The  State  Legislative Analyst
estimates a resultant revenue reduction of $200 million for the remainder of the
1992-93 fiscal year and $300-330 million per year thereafter.
 
    The State is a party to  numerous legal proceedings, many of which  normally
occur  in  governmental  operations and,  if  decided against  the  State, might
require the  State to  make  significant future  expenditures or  impair  future
revenue sources.
 
    Although  an improving economy  and healthier tax  revenues are anticipated,
the political  environment  and  voter initiatives  may  constrain  the  State's
financial  flexibility.  For  example, according  to  the  Legislative Analyst's
Office the passage of  Proposition 187 in the  November 1994 election, which  in
part  denies certain social services to illegal immigrants, could jeopardize $15
billion in federal funding. In addition,  the passage of Proposition 184 in  the
November  1994 election,  which imposes  mandatory, lengthy  prison sentences on
individuals  convicted  of  three  felonies,  is  expected  to  increase  prison
operating costs by $3 billion annually and increase prison construction costs by
$20 billion.
 
    On   December  6,  1994,  Orange  County  (California)  became  the  largest
municipality in  the United  States to  file for  protection under  the  Federal
bankruptcy  laws. The filing  stemmed from approximately  $1.7 billion in losses
suffered by  the  County's investment  pool  due  to investments  in  high  risk
"derivative"  securities. On June 12, 1996, it emerged from bankruptcy after the
successful sale of $880 million in municipal bonds allowed the county to pay off
the last of its  creditors. On January  7, 1997, Orange  County returned to  the
municipal  bond market with a $136 million bond issue maturing in 13 years at an
insured yield of 7.23%.
 
    Los Angeles  County,  the  nation's largest  county,  is  also  experiencing
financial difficulty. In August 1995 the credit rating of the county's long-term
bonds  was downgraded for  the third time since  1992 as a  result of, and among
other things, severe  operating deficits  for the county's  health care  system.
Also,  the county has not yet recovered  from the ongoing loss of revenue caused
by state  property tax  shift initiatives  in 1993  through 1995.  Entering  the
1996-1997  fiscal year, the county faced  a budgetary shortfall of approximately
$516 million.  The county's  budgetary difficulties  have continued  with  their
effect on the 1997-1998 budget still uncertain.
 
    The  effect  of these  various constitutional  and statutory  amendments and
budget developments upon the ability of  California issuers to pay interest  and
principal  on their obligations remains unclear and in any event may depend upon
whether a  particular California  tax-exempt security  is a  general or  limited
obligation  bond  and on  the  type of  security provided  for  the bond.  It is
possible that  other measures  affecting  the taxing  or spending  authority  of
California  or  its political  subdivisions may  be approved  or enacted  in the
future.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in of 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 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-Dealers")  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
 
                                       20
<PAGE>
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  in 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  provides that  it will  remain in  effect from  year to  year thereafter if
approved by the Board. At its meeting  held on April 17, 1996, the Fund's  Board
of 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,  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 California Tax-Free
Daily Income 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.
 
    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 New York  Municipal Money Market Trust,  or Dean Witter U.S.
Government Money Market Trust  (these five funds  are hereinafter called  "money
market  funds")  or,  Dean  Witter Limited  Term  Municipal  Trust,  Dean Witter
Short-Term Bond Fund, Dean  Witter Short-Term U.S.  Treasury Trust, Dean  Witter
Balanced  Income  Fund,  Dean  Witter  Balanced  Growth  Fund  and  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
 
                                       21
<PAGE>
exchange for shares of an FESC fund  (regardless of the type of fund  originally
purchased) may be redeemed and exchanged for shares of the other 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 ("CDSC") 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 Funds, the exchange is executed at no charge to the shareholder,
without the imposition  of the  CDSC at  the time  of the  exchange. During  the
period  of time the  shareholder remains in the  Exchange Funds (calculated from
the last day of the month in which the Exchange Funds shares were acquired), 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 cases of shares of a CDSC fund exchanged into an Exchange Fund,
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 money market 12b-1 distribution fees incurred on
or after  that  date  which  are  attributable  to  those  shares.  Shareholders
acquiring  shares  of Exchange  Funds pursuant  to  this exchange  privilege may
exchange those shares back into  a CDSC fund from  Exchange Funds, with no  CDSC
being imposed on such exchange. The holding period previously frozen when shares
were first exchanged for shares of Exchange Funds resumes on the last day of the
month  in which shares  of a CDSC fund  are reacquired. Thus,  a CDSC is imposed
only upon an ultimate redemption, based  upon the time (calculated as  described
above)  the  shareholder was  invested in  a CDSC  fund. 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.
 
    When shares initially purchased in a  CDSC fund are exchanged for shares  of
another  CDSC fund or for shares of Exchange  Funds, 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 Strategist Fund  acquired prior to November 8, 1989,  Dean
Witter  American Value Fund acquired prior to April 30, 1984, and shares of Dean
Witter  Dividend  Growth  Securities  Inc.  and  Dean  Witter  Natural  Resource
Development  Securities Inc. acquired prior to July 2, 1984, are also considered
Free Shares  and  will be  the  first Free  Shares  to be  exchanged.  After  an
exchange,  all  dividends earned  on shares  in  the money  market 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
 
                                       22
<PAGE>
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 repurchase of  shares of the  Fund, the application  of
proceeds to the purchase of new shares in the Fund or any other of the funds and
the general administration of the Exchange Privilege, the Transfer Agent acts as
agent  for the Distributor and for  the shareholder's Selected Broker-Dealer, if
any,  in  the  performance  of  such  functions.  With  respect  to   exchanges,
redemptions  or  repurchases, the  Transfer Agent  shall be  liable for  its own
negligence and not for  the default or negligence  of its correspondents or  for
losses in transit. The Fund shall not be liable for any default or negligence of
the Transfer Agent, 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  the Distributor,  or  any Selected
Broker-Dealer for any transactions pursuant to this Exchange Privilege.
 
    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 and $5,000 for the Fund, Dean Witter
Liquid  Asset   Fund   Inc.,   Dean  Witter   Tax-Free   Daily   Income   Trust,
 
                                       23
<PAGE>
and Dean Witter New York Municipal Money Market Trust, although those funds may,
at their discretion, accept initial investments of as low as $1,000. The minimum
initial  investment 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 a money market 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 the Fund and/or  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 the Exchange  Funds, TCW/DW North American Government  Income
Trust,  TCW/DW Income and Growth Fund and  TCW/DW Balanced Fund pursuant to this
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  exchange may be limited  in situations where there  is an exchange of shares
within ninety days  after the shares  are purchased. The  Exchange Privilege  is
only  available in  states where  an exchange may  legally be  made. For further
information regarding the Exchange Privilege, shareholders should contact  their
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  the Distributor,  the Distributor  provides  certain
services  and finances certain activities in connection with the distribution 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.)
A Plan was approved by the Board of Trustees on June 20, 1988 and by DWR, as the
Fund's  then sole shareholder,  on June 22,  1988, 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
(as  defined in  the Act) 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  Plan remained  in effect  until April  30, 1989,  and will  continue in
effect from  year to  year  thereafter, provided  such continuance  is  approved
annually  by a  vote of  the Trustees, including  a majority  of the Independent
Trustees. 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
 
                                       24
<PAGE>
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  12b-1  Directors  is  committed  to  the  discretion  of  the
Independent 12b-1 Directors.
 
    Pursuant to the Plan,  the Trustees were provided  at their meeting held  on
April  17, 1996, with all the information  the Trustees deemed necessary to make
an informed determination  on whether the  Plan should be  continued. In  making
their  determination to  continue the Plan  until April 30,  1997, the Trustees,
including all  of the  Independent 12b-1  Trustees, unanimously  arrived at  the
conclusion  that the Plan had benefitted the Fund and also unanimously concluded
that, in their  judgment, there is  a reasonable likelihood  that the Plan  will
continue to benefit the Fund and its shareholders.
 
    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  and
Agreement:  (1)  compensation  to  and  expenses  of  DWR's  and  other Selected
Broker-Dealer 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.
 
    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.
 
   
    DWR  account executives are paid an  annual residual commission, currently a
gross residual  of up  to 0.10  of 1%  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  shareholders  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 the  Distributor for specific  expenses
the  Distributor incurs or plans  to incur in promoting  the distribution of the
Fund's shares.  Reimbursement  is  made  through  monthly  payments  in  amounts
determined  in  advance of  each  fiscal 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 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 Distributor 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.
 
                                       25
<PAGE>
    The  Fund  reimbursed  $263,178 to  the  Distributor, pursuant  to  the then
current Plan, for the fiscal year ended December 31, 1996. This is 0.10 of 1% of
the Fund's average daily net assets for its fiscal year ended December 31, 1996.
Based upon the total amounts spent by  the Distributor during the period, it  is
estimated  that  the amount  paid  by the  Fund  for distribution  was  spent in
approximately the  following  ways:  (i) advertising--$-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 includes payments
to  the  Distributor  for  expenses   substantially  all  of  which  relate   to
compensation of sales personnel and associated overhead expenses--$263,178.
 
    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.
 
    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  by the Distributor 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 except to the extent that DWR,
the Distributor or the Investment Manager, or certain of their employees, may be
deemed to  have such  an  interest as  a result  of  benefits derived  from  the
successful  operation of the Plan, or as a  result of receiving a portion of the
amounts expended thereunder by the Fund.
 
DETERMINATION OF NET ASSET VALUE
 
    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 at
the time of  purchase 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
Fund's Trustees are obligated, as a particular responsibility within the overall
duty of care owed to the Fund's
 
                                       26
<PAGE>
shareholders, to establish procedures  reasonably designed, taking into  account
current market conditions and the Fund's investment objectives, 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 Fund  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; (c) 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  (d) 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  Fund;  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 Fund'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 Fund.
 
    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  397  days.  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.
 
    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 (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  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.
 
    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 Fund'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
 
                                       27
<PAGE>
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 (1) 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 Fund'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.
 
    Also, as  required by  the Rule,  the  Fund will  limit its  investments  in
securities,  other than Government securities, so that, at the time of purchase:
(a) except as further limited in (b) below with regard to certain securities, no
more than 5% (10% if  a guarantee) of its total  assets will be invested in  the
securities  of any one issuer; and (b)  with respect to Eligible Securities that
have received a  rating in  less than  the highest category  by any  one of  the
NRSROs  whose ratings are used to qualify  the security as an Eligible Security,
or determined to be of comparable quality that are "Conduit Securities" as  that
term  is  defined in  the Rule:  (i) no  more than  5% will  be invested  in the
aggregate of the Fund's total  assets in all such  securities, and (ii) no  more
than  the greater of 1% of total assets,  or $1 million, will be invested in the
securities of any one issuer.
 
    If the Board determines that  it is no longer in  the best interests of  the
Fund  and its shareholders to maintain a stable  price of $1 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 Fund 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 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.
 
                                       28
<PAGE>
REDEMPTION OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus,  shares of the Fund  may be redeemed 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 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 sixty 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 at least $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 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  acceptable  to   the  Transfer  Agent
(shareholders should  contact  the Transfer  Agent  for a  determination  as  to
whether  a particular institution is such  an eligible guarantor). A shareholder
may, at any time, change the amount and interval of withdrawal payments  through
his  or her 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
share-
 
                                       29
<PAGE>
holder 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 years, 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.
 
    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 for taxable  years beginning in 1990 and thereafter,
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 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.
 
    In  determining amounts to  be distributed, capital gains  will be offset by
any capital loss carryovers  incurred in prior years.  To the extent that  these
carryover  losses are used to  offset future capital gains,  it is probable that
the gains  so offset  will not  be distributed  to shareholders  since any  such
distributions may be taxable to shareholders as ordinary income.
 
    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 Superfund Amendments  and Reauthorization  Act of  1986 (the  "Superfund
Act")  imposes a deductible  tax on a  corporation's alternative minimum taxable
income (computed without regard to the
 
                                       30
<PAGE>
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.
 
    After the end of  the calendar year,  the Fund will  mail to shareholders  a
statement  indicating  the percentage  of  the dividend  distributions  for such
calendar 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.
 
    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 Fund 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 California
tax-exempt securities and on certain U.S. government securities, such  dividends
will also be exempt from California personal income taxes. Under California law,
a  fund which qualifies as a regulated investment company must have at least 50%
of its total assets  invested in California  state and local  issues or in  U.S.
obligations  which pay  interest excludable from  income or in  a combination of
such obligations at the end of each quarter of its
 
                                       31
<PAGE>
taxable year in order  to be eligible to  pay dividends to California  residents
which  will be exempt from California personal income taxes. Unlike federal law,
California law provides that  no portion of  the exempt-interest dividends  will
constitute  an item of tax preference for California personal income alternative
minimum tax purposes.
 
    For California personal income  tax purposes, the  shareholders of the  Fund
will  not be subject to tax, or receive a  credit for taxes paid by the Fund, on
undistributed capital gains, if any.  Under the California Revenue and  Taxation
Code, interest on indebtedness incurred or continued 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 state personal income tax purposes.
 
    The foregoing relates to federal income taxation and to California  personal
income  taxation as in  effect as of  the date of  the Prospectus. Distributions
from interest income and capital gains, including exempt-interest dividends, may
be subject to  California franchise  taxes if  received by  a corporation  doing
business  in California, to state  taxes in states other  than California and to
local taxes.
 
    Any dividends or capital gains distributions received by a shareholder  from
any  investment company will have the effect  of reducing the net asset value of
the shareholder's shares in  that fund by  the exact amount  of the dividend  or
capital  gains distribution.  Furthermore, capital gains  distributions are, and
some portion of the dividends  may be, subject to income  tax. If the net  asset
value  of the shares should be reduced below a shareholder's cost as a result of
the payment of dividends, such payment or distribution would be in part a return
of the  shareholder's investment  to  the extent  of  such reduction  below  the
shareholder's  cost but  nonetheless would be  fully taxable  at ordinary rates.
Therefore, an investor should consider  the tax implications of purchasing  Fund
shares immediately prior to a distribution record date.
 
    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
2.89%. The effective annual yield on December 31, 1996 was 2.93%, 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 to obtain 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 (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.
 
                                       32
<PAGE>
    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 California personal income tax bracket  of
46.24%,  the Fund's tax-equivalent yield for  the seven days ending December 31,
1996 was 5.38%.
 
    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  $13,293,
$66,465 and $132,930, respectively, at December 31, 1996.
 
DESCRIPTION OF SHARES
- --------------------------------------------------------------------------------
 
    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  Trustees
themselves  have the power  to alter the number  and the terms  of office of the
Trustees, and they may at any time lengthen their own terms or make their  terms
of  unlimited duration and appoint their own successors, provided that always at
least a majority of  the Trustees has  been elected by  the shareholders of  the
Fund.  Under certain circumstances the Trustees may  be removed by action of the
Trustees. The shareholders also  have the right  under certain circumstances  to
remove  the Trustees. The  voting rights of shareholders  are not cumulative, so
that holders  of more  than fifty  percent of  the shares  voting can,  if  they
choose,  elect all Trustees  being selected, while the  holders of the remaining
shares would be unable to elect any Trustees.
 
    The Declaration of Trust permits the  Trustees to authorize the creation  of
additional  series  of  shares  (the  proceeds of  which  would  be  invested in
separate, independently  managed portfolios)  and additional  classes of  shares
within  any  series (which  would be  used  to distinguish  among the  rights of
different categories of shareholders, as might be required by future regulations
or other unforeseen circumstances). The  Trustees have not presently  authorized
any such additional series or classes of shares.
 
    The Declaration of Trust further provides that no Trustee, officer, employee
or  agent of  the Fund is  liable to the  Fund or  to a shareholder,  nor is any
Trustee, officer, employee or  agent liable to any  third persons in  connection
with the affairs of the Fund, except as such liability may arise from his/her or
its  own bad faith, willful misfeasance, gross negligence, or reckless disregard
of his duties. It also provides that all third persons shall look solely to  the
Fund  property for satisfaction of claims arising in connection with the affairs
of the Fund. With the exceptions stated, the Declaration of Trust provides  that
a  Trustee, officer,  employee or  agent is  entitled to  be indemnified against
liability in connection with the affairs of the Fund.
 
    The Fund is authorized to issue an unlimited number of shares of  beneficial
interest.  The Fund shall be of unlimited  duration subject to the provisions in
the Declaration of Trust concerning termination by action of the shareholders.
 
CUSTODIAN AND TRANSFER AGENT
- --------------------------------------------------------------------------------
 
    The Bank of New York, 90 Washington Street, New York, New York 10286 is  the
Custodian of the Fund's assets. The Custodian has no part in deciding the Fund's
investment policies or which securities
 
                                       33
<PAGE>
are  to be purchased or  sold for the Fund's portfolios.  Any of the Fund's cash
balances with the  Custodian in excess  of $100,000 are  unprotected by  Federal
deposit insurance. Such balances may, at times, be substantial.
 
    Dean  Witter Trust Company,  Harborside Financial Center,  Plaza Two, Jersey
City, New Jersey 07311 is the Transfer  Agent of the Fund's shares and  Dividend
Disbursing  Agent for payment of dividends  and distributions on Fund shares and
Agent for shareholders  under various  investment plans  described herein.  Dean
Witter  Trust  Company is  an affiliate  of Dean  Witter InterCapital  Inc., the
Fund's  Investment  Manager  and  Dean  Witter  Distributors  Inc.,  the  Fund's
Distributor.  As Transfer Agent and Dividend Disbursing Agent, Dean Witter Trust
Company's responsibilities include maintaining shareholder accounts,  disbursing
cash  dividends  and  reinvesting  dividends,  processing  account  registration
changes, handling purchase and redemption transactions, mailing prospectuses and
reports,  mailing   and  tabulating   proxies,  processing   share   certificate
transactions,  and maintaining shareholder records and lists. For these services
Dean Witter Trust Company receives a per shareholder account fee from the Fund.
 
INDEPENDENT ACCOUNTANTS
- --------------------------------------------------------------------------------
 
    Price Waterhouse LLP serves as the independent accountants of the Fund.  The
independent  accountants  are  responsible  for  auditing  the  annual financial
statements of the Fund.
 
REPORTS TO SHAREHOLDERS
- --------------------------------------------------------------------------------
 
    The Fund will send to shareholders, at least semi-annually, reports  showing
the  Fund's  portfolio  and  other  information.  An  annual  report  containing
financial  statements  audited  by  independent  accountants  will  be  sent  to
shareholders each year.
 
    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 this 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 fiscal  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.
 
                                       34
<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.
 
                                       35
<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.
 
                                       36
<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.
 
                                       37
<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  Standard  and Poor's  from  other sources  it considers
reliable. The ratings  may be  changed, suspended or  withdrawn as  a result  of
changes  in or unavailability of such information. Ratings are graded into group
categories, ranging from "A" for the highest quality obligations to "D" for  the
lowest.  Ratings are applicable to both taxable and tax-exempt commercial paper.
The categories are as follows:
 
    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.
 
                                       38


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