DEAN WITTER LIQUID ASSET FUND INC
485BPOS, 1996-10-16
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<PAGE>
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 16, 1996
    
 
                                                    REGISTRATION NOS.:  811-2575
                                                                         2-53856
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ----------------
 
                                   FORM N-1A
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933                     /X/
                          PRE-EFFECTIVE AMENDMENT NO.                        / /
                        POST-EFFECTIVE AMENDMENT NO. 33                      /X/
                                     AND/OR
                             REGISTRATION STATEMENT
                    UNDER THE INVESTMENT COMPANY ACT OF 1940                 /X/
                                AMENDMENT NO. 23                             /X/
 
                              -------------------
 
                               DEAN WITTER LIQUID
                                ASSET FUND INC.
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 392-1600
 
                              SHELDON CURTIS, ESQ.
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                    (NAME AND ADDRESS OF AGENT FOR SERVICE)
 
                                    COPY TO:
                            DAVID M. BUTOWSKY, ESQ.
                             GORDON ALTMAN BUTOWSKY
                             WEITZEN SHALOV & WEIN
                              114 WEST 47TH STREET
                            NEW YORK, NEW YORK 10036
 
                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
 As soon as practicable after this Post-Effective Amendment becomes effective.
 
 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)
           ___ immediately upon filing pursuant to paragraph (b)
           _X_ on October 18, 1996 pursuant to paragraph (b)
           ___ 60 days after filing pursuant to paragraph (a)
           ___ on (date) pursuant to paragraph (a) of rule 485.
 
    THE  REGISTRANT HAS REGISTERED AN INDEFINITE  NUMBER OF ITS SHARES UNDER THE
SECURITIES ACT OF  1933 PURSUANT  TO SECTION  (A) (1)  OF RULE  24F-2 UNDER  THE
INVESTMENT  COMPANY ACT OF 1940. THE REGISTRANT HAS FILED THE RULE 24F-2 NOTICE,
FOR ITS FISCAL  YEAR ENDED  AUGUST 31, 1996,  WITH THE  SECURITIES AND  EXCHANGE
COMMISSION ON OCTOBER 2, 1996.
 
           AMENDING THE PROSPECTUS AND UPDATING FINANCIAL STATEMENTS
 
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<PAGE>
                       DEAN WITTER LIQUID ASSET FUND INC.
 
                             CROSS-REFERENCE SHEET
 
                                   FORM N-1A
 
<TABLE>
<CAPTION>
ITEM                                                                           CAPTION
- ----------------------------------------------  ---------------------------------------------------------------------
<S>                                             <C>
PART A                                                                       PROSPECTUS
 1.  .........................................  Cover Page
 2.  .........................................  Prospectus Summary; Summary of Fund Expenses
 3.  .........................................  Financial Highlights; Dividends, Distributions and Taxes
 4.  .........................................  Cover Page; Prospectus Summary; Investment Objectives and Policies;
                                                 The Fund and Its Management; Investment Restrictions
 5.  .........................................  The Fund and Its Management; Back Cover; Investment Objectives and
                                                 Policies
 6.  .........................................  Dividends, Distributions and Taxes; Additional Information
 7.  .........................................  Purchase of Fund Shares; Shareholder Services; Prospectus Summary
 8.  .........................................  Redemption of Fund Shares; Shareholder Services
 9.  .........................................  Not Applicable
 
PART B                                                           STATEMENT OF ADDITIONAL INFORMATION
10.  .........................................  Cover Page
11.  .........................................  Table of Contents
12.  .........................................  The Fund and Its Management
13.  .........................................  Investment Practices and Policies; Investment Restrictions; Portfolio
                                                 Transactions and Brokerage
14.  .........................................  The Fund and Its Management; Directors and Officers
15.  .........................................  Directors and Officers
16.  .........................................  The Fund and Its Management; Purchase of Fund Shares; Custodian and
                                                 Transfer Agent; Independent Accountants
17.  .........................................  Portfolio Transactions and Brokerage
18.  .........................................  Description of Common Stock
19.  .........................................  Purchase of Fund Shares; Redemption of Fund Shares
20.  .........................................  Dividends, Distributions and Taxes
21.  .........................................  Purchase of Fund Shares
22.  .........................................  Dividends, Distributions and Taxes
23.  .........................................  Financial Statements
</TABLE>
 
PART C
 
    Information  required  to be  included  in Part  C  is set  forth  under the
appropriate item, so numbered, in Part C of this Registration Statement.
<PAGE>
               PROSPECTUS
   
               OCTOBER 18, 1996
    
 
               Dean Witter Liquid Asset Fund Inc. (the "Fund") is a no-load,
open-end diversified management investment company investing in the following
money market instruments: United States Government securities, obligations of
U.S. regulated banks and savings and loan associations having assets of $1
billion or more, high grade commercial paper, certificates of deposit of
$100,000 or less of U.S. regulated banks and savings institutions having total
assets of less than $1 billion which are fully federally insured as to principal
(the interest may not be insured) and high grade corporate obligations maturing
in thirteen months or less. The Fund has a 12b-1 Plan (see below). The
investment objectives of the Fund are high current income, preservation of
capital and liquidity (see "Investment Objectives 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 with Dean Witter Distributors Inc., 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 October 18, 1996, 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 cover 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
Liquid Asset Fund Inc.
Two World Trade Center
New York, New York 10048
                               TABLE OF CONTENTS
 
   
Prospectus Summary/2
Summary of Fund Expenses/3
Financial Highlights/3
The Fund and its Management/4
Investment Objectives and Policies/4
Investment Restrictions/6
Purchase of Fund Shares/7
Shareholder Services/9
Redemption of Fund Shares/12
Dividends, Distributions and Taxes/13
Additional Information/14
Report of Independent Accountants/16
Financial Statements -- August 31, 1996/17
    
 
  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, THE FEDERAL RESERVE BOARD, OR ANY OTHER AGENCY.
 
THESE SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES  AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION OR
ANY  STATE SECURITIES  COMMISSION PASSED UPON  THE ACCURACY OR  ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                    Dean Witter Distributors Inc.
                    Distributor
<PAGE>
PROSPECTUS SUMMARY
- --------------------------------------------------------------------------------
 
The Fund         An open-end diversified management investment company
                 investing in money market instruments.
 
- --------------------------------------------------------------------------------
 
Shares Offered   Common Stock (see page 14).
 
- --------------------------------------------------------------------------------
 
Purchase         Investments may be made:
of Shares        - By wire
                 - By mail
                 - By EasyInvest-SM-
                 - 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 (by wire or by mail), $1,000 or more (through
                 account executives) or $100 to $5,000 (by EasyInvest).
                 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
                 page 7).
 
- --------------------------------------------------------------------------------
 
Investment       High current income, preservation of capital and liquidity
Objectives       (see page 4).
 
- --------------------------------------------------------------------------------
 
Authorized       Money market instruments (see page 4):
Investments      - United States Government securities
                 - Obligations of U.S. regulated banks having assets of $1
                 billion or more
                 - High grade commercial paper
                 - High grade corporate obligations maturing in thirteen months
                 or less
                 - Certificates of deposit of savings banks and savings and
                 loan associations having
                 assets of $1 billion or more
                 - Certificates of deposit of $100,000 or less, of U.S.
                 regulated banks and savings
                 institutions, having total assets of less than $1 billion,
                 which are fully federally insured as
                 to principal. The interest may not be insured.
                 - Repurchase agreements and reverse repurchase agreements (see
                 pages 5 and 6).
 
- --------------------------------------------------------------------------------
 
   
Investment       Dean Witter InterCapital Inc., the Investment Manager of the
Manager          Fund, and its wholly-owned subsidiary, Dean Witter Services
                 Company Inc., serve in various investment management,
                 advisory, management and administrative capacities to 100
                 investment companies and other portfolios with assets of
                 approximately $86.5 billion at September 30, 1996 (see page
                 4).
 
- --------------------------------------------------------------------------------
    
 
Management       Monthly fee at an annual rate of 0.50% of average daily net
Fee              assets up to $500 million, scaled down at various levels of
                 net assets to 0.248% on assets over $17.5 billion (see page
                 4).
 
- --------------------------------------------------------------------------------
 
Distributor      Dean Witter Distributors Inc. (the "Distributor") sells shares
                 of the Fund through Dean Witter Reynolds Inc. and other
                 Selected Broker-Dealers pursuant to selected dealer
                 agreements. Other than the reimbursement to the Distributor
                 pursuant to the Rule 12b-1 Distribution Plan, the Distributor
                 receives no distribution fees (see page 8).
 
- --------------------------------------------------------------------------------
 
Plan of          The Fund is authorized to reimburse specific expenses incurred
Distribution     in promoting the distribution of the Fund's 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 0.15 of 1% of average daily net assets of the
                 Fund (see page 8).
 
- --------------------------------------------------------------------------------
 
Dividends        Declared and automatically reinvested daily in additional
                 shares; cash payments of dividends available monthly (see page
                 13).
 
- --------------------------------------------------------------------------------
 
Reports          Individual periodic account statements; annual and semi-annual
                 Fund financial statements.
 
- --------------------------------------------------------------------------------
 
Redemption       Shares are redeemable at net asset value without any charge
                 (see page 12):
of Shares        - By check
                 - By telephone or wire instructions, with proceeds wired or
                   mailed to a predesignated bank account.
                 - By mail
                 A shareholder's account is subject to possible involuntary
                 redemption if its value falls below $1,000 (see page 13).
 
- --------------------------------------------------------------------------------
 
Risks            The Fund's investments are limited to U.S. Government
                 securities, high grade corporate obligations and obligations
                 of banks and savings and loan associations having assets of $1
                 billion or more and certificates of deposit which are fully
                 federally insured as to principal; consequently, the portfolio
                 securities of the Fund are subject to minimal risk of loss of
                 income and principal. However, the investor is directed to the
                 discussion of "Repurchase Agreements" and "Reverse Repurchase
                 Agreements" (see page 5) concerning any risk associated with
                 such portfolio securities and management techniques.
 
- --------------------------------------------------------------------------------
 
 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 August 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 Fee..........................................................   None
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- ----------------------------------------------------------------------
Management Fees.......................................................  0.28%
12b-1 Fees............................................................  0.10%
Other Expenses........................................................  0.25%
Total Fund Operating Expenses.........................................  0.63%
</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:.......................................    $6       $20       $35       $78
</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,"  "Purchase  of Fund  Shares"  and  "Shareholder
Services."
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
    The  following  ratios and  per  share data  for  a share  of  capital stock
outstanding throughout  each year  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
independent  accountants which  are contained  in this  Prospectus commencing on
page 16.
 
<TABLE>
<CAPTION>
                                                              FOR THE YEAR ENDED AUGUST 31,
                               --------------------------------------------------------------------------------------------
                                 1996     1995     1994     1993      1992      1991      1990     1989     1988     1987
                               --------  -------  -------  -------  --------  --------  --------  -------  -------  -------
<S>                            <C>       <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    $1.00
                               --------  -------  -------  -------  --------  --------  --------  -------  -------  -------
Net investment income.........    0.050    0.053    0.030    0.027     0.040     0.064     0.079    0.086    0.068    0.057
Less dividends from net
 investment income............   (0.050)  (0.053)  (0.030)  (0.027)   (0.040)   (0.064)   (0.079)  (0.086)  (0.068)  (0.057)
                               --------  -------  -------  -------  --------  --------  --------  -------  -------  -------
Net asset value, end of
 period.......................    $1.00    $1.00    $1.00    $1.00     $1.00     $1.00     $1.00    $1.00    $1.00    $1.00
                               --------  -------  -------  -------  --------  --------  --------  -------  -------  -------
                               --------  -------  -------  -------  --------  --------  --------  -------  -------  -------
TOTAL INVESTMENT RETURN+......     5.15%    5.41%    3.07%    2.72%     4.10%     6.61%     8.27%    8.96%    7.01%    5.93%
RATIOS TO AVERAGE NET ASSETS:
Expenses......................     0.63%    0.65%    0.70%    0.69%     0.67%     0.62%     0.56%    0.56%    0.61%    0.63%
Net investment income.........     5.02%    5.28%    3.02%    2.67%     4.03%     6.41%     7.91%    8.66%    6.77%    5.74%
SUPPLEMENTAL DATA:
Net assets, end of period, in
 millions.....................  $11,389  $10,359   $8,492   $7,959    $9,214   $10,811   $11,902  $10,734   $8,056   $6,965
</TABLE>
 
- ------------
+ Calculated based on the net asset value as of the last business day of the
period.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
                                       3
<PAGE>
THE FUND AND ITS MANAGEMENT
 
- --------------------------------------------------------------------------------
 
    Dean  Witter Liquid Asset Fund Inc.  (the "Fund") is an open-end diversified
management investment company incorporated in Maryland on September 3, 1974.
 
    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  100 investment  companies,  thirty of  which  are
listed  on the  New York Stock  Exchange, with combined  assets of approximately
$83.6 billion as of September 30, 1996. The Investment Manager also manages  and
advises  portfolios of pension  plans, other institutions  and individuals which
aggregated approximately $2.9 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
provide the aforementioned administrative services to the Fund. The Fund's Board
of Directors reviews the various services provided by or under the direction  of
the Investment Manager to ensure that the Fund's general investment policies and
programs  are being  properly carried out  and that  administrative services are
being provided to the Fund in a satisfactory manner.
 
   
    As full compensation for the services  and facilities furnished to the  Fund
and  expenses of the Fund  assumed by the Investment  Manager, the Fund pays the
Investment Manager monthly compensation  calculated daily at  an annual rate  of
0.50%  of the daily  net assets of the  Fund up to $500  million, scaled down at
various asset levels to 0.248% on assets over $17.5 billion. For the fiscal year
ended August 31,  1996, the Fund  accrued total compensation  to the  Investment
Manager amounting to 0.28% of the Fund's average daily net assets and the Fund's
total expenses amounted to 0.63% of the Fund's average daily net assets.
    
 
INVESTMENT OBJECTIVES AND POLICIES
- --------------------------------------------------------------------------------
 
    The  investment objectives of the Fund are high current income, preservation
of capital and liquidity. The investment  objectives may not be changed  without
approval of the Fund's shareholders. The Fund seeks to achieve its objectives by
investing in the following money market instruments:
 
    U.S.GOVERNMENT  SECURITIES. Obligations issued or guaranteed as to principal
and interest by  the United States  or its agencies  (such as the  Export-Import
Bank  of  the  United  States, Federal  Housing  Administration,  and Government
National Mortgage Association)  or its  instrumentalities (such  as the  Federal
Home  Loan  Bank,  Federal Intermediate  Credit  Banks and  Federal  Land Bank),
including Treasury bills, notes and bonds;
 
    BANK  OBLIGATIONS.  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;
 
    OBLIGATIONS  OF  SAVINGS INSTITUTIONS.  Certificates  of deposit  of savings
banks and savings and  loan associations, having total  assets of $1 billion  or
more;
 
    FULLY  INSURED CERTIFICATES OF DEPOSIT. Certificates of deposit of banks and
savings institutions  having  total assets  of  less  than $1  billion,  if  the
principal  amount of the  obligation is federally insured  by the Bank Insurance
Fund or the Savings Association Insurance Fund (each of which is administered by
the Federal Deposit Insurance Corporation), limited to $100,000 principal amount
per certificate  and to  10% or  less of  the Fund's  total assets  in all  such
 
                                       4
<PAGE>
obligations and in all illiquid assets, in the aggregate;
 
    COMMERCIAL  PAPER AND CORPORATE OBLIGATIONS.  Commercial paper and corporate
debt obligations maturing in thirteen months or  less which are rated in one  of
the  two highest  rating categories for  short-term debt obligations  or, if not
rated, have been issued by issuers which have another short-term debt obligation
that is comparable in priority and security to such non-rated securities and  is
so rated, by at least two nationally recognized statistical rating organizations
("NRSROs")  (or  one  NRSRO  if  the  instrument  was  rated  by  only  one such
organization) or which, if unrated, are  of comparable quality as determined  in
accordance  with procedures  established by the  Board of  Directors. The NRSROs
currently rating  instruments of  the type  the Fund  may purchase  are  Moody's
Investors  Service, Inc., Standard & Poor's  Corporation, Duff and Phelps, Inc.,
Fitch  Investors  Service,  Inc.,  IBCA  Limited  and  IBCA  Inc.,  and  Thomson
Bankwatch,  Inc.  Their rating  criteria are  described in  the Appendix  to the
Fund's Statement of Additional Information.
 
    The foregoing  rating limitations  apply at  the time  of acquisition  of  a
security.  Any subsequent  change in  any rating  by a  rating service  will not
require elimination  of any  security  from the  Fund's portfolio.  However,  in
accordance  with procedures adopted by the Fund's Board of Directors 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 Directors who will, in turn, determine whether the securities
continue to present minimal credit risks to the Fund.
 
    The ratings  assigned by  the  NRSROs represent  their  opinions as  to  the
quality  of  the securities  they undertake  to rate.  It should  be emphasized,
however, that the ratings are general and not absolute standards of quality.
 
    Subject to the  foregoing requirements,  the Fund may  invest in  commercial
paper  which  has  been issued  pursuant  to the  "private  placement" exemption
afforded by Section 4(2)  of the Securities Act  of 1933 (the "Securities  Act")
and  which may be  sold to other  institutional investors pursuant  to Rule 144A
under the  Securities  Act. Management  considers  such legally  restricted  but
readily   marketable  commercial  paper  to  be  liquid.  However,  pursuant  to
procedures approved  by the  Board of  Directors of  the Fund,  if a  particular
investment  in  such  commercial  paper  is  determined  to  be  illiquid,  that
investment will be included  within the 10%  limitation on illiquid  investments
(see  "Investment  Restrictions").  If at  any  time the  Fund's  investments in
illiquid securities exceed 10% of the Fund's total assets, the Fund will attempt
to dispose of  illiquid securities in  an orderly fashion  to reduce the  Fund's
holdings in such securities to less than 10% of its total assets.
 
    REPURCHASE  AGREEMENTS. The Fund may enter into repurchase agreements, which
may be viewed  as a type  of secured lending  by the Fund,  and which  typically
involve  the acquisition by the Fund of debt securities from a selling financial
institution such as a bank, savings  and loan association or broker-dealer.  The
agreement provides that the Fund will sell back to the institution, and that the
institution  will  repurchase,  the  underlying  security  ("collateral")  at  a
specified price and at a fixed time  in the future, usually not more than  seven
days  from  the  date  of  purchase. The  collateral  will  be  maintained  in a
segregated account and will be marked  to market daily to determine whether  the
full  value of the collateral, as specified  in the agreement, has not decreased
below the  repurchase price  plus  accrued interest.  If such  decrease  occurs,
additional collateral will be requested, and when received, will be added to the
account  to maintain full collateralization. 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  thirteen months. 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 and specifying the required value of the
collateral underlying the agreement.
 
    REVERSE REPURCHASE  AGREEMENTS. The  Fund may  also use  reverse  repurchase
agreements as
 
                                       5
<PAGE>
part  of its investment strategy. Reverse repurchase agreements involve sales by
the Fund  of portfolio  assets concurrently  with an  agreement by  the Fund  to
repurchase the same assets at a later date at a fixed price.
 
    VARIABLE  RATE  AND  FLOATING  RATE OBLIGATIONS.  Certain  of  the  types of
investments described above may be  variable rate or floating rate  obligations.
The interest rates payable on variable rate or floating rate obligations are not
fixed  and may fluctuate based  upon changes in market  rates. The interest rate
payable on a variable rate obligation may be adjusted 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.
 
    Although the  Fund  will  generally  not  seek  profits  through  short-term
trading,  it may dispose of any portfolio  security prior to its maturity if, on
the basis of a revised credit evaluation of the issuer or other circumstances or
considerations, it believes such disposition advisable.
 
    The Fund is  expected to have  a high  portfolio turnover due  to the  short
maturities  of securities  purchased, but this  should not affect  income or net
asset value as brokerage commissions are not normally charged on the purchase or
sale of money market instruments.
 
    The Fund will  attempt to  balance its  objectives of  high income,  capital
preservation  and liquidity by investing in securities of varying maturities and
risks. The Fund will not, however, invest in securities that mature in more than
thirteen months  from the  date of  purchase (see  "Purchase of  Fund Shares  --
Determination  of  Net Asset  Value"). The  amounts  invested in  obligations of
various maturities  of  thirteen months  or  less will  depend  on  management's
evaluation  of the  risks involved.  Longer-term issues,  while generally paying
higher interest rates, are subject, as  a result of general changes in  interest
rates,  to greater  fluctuations in value  than shorter-term  issues. Thus, when
rates on new debt securities increase,  the value of outstanding securities  may
decline,  and vice versa. Such  changes may also occur,  but to a lesser degree,
with short-term issues. These  changes, if realized,  may cause fluctuations  in
the  amount of daily dividends and, in  extreme cases, could cause the net asset
value per share to decline (see  "Purchase of Fund Shares--Determination of  Net
Asset  Value"). Longer-term issues also increase the risk that the issuer may be
unable to pay an installment of interest or principal at maturity. Also, in  the
event of unusually large redemption demands, such securities may have to be sold
at  a loss prior to maturity,  or the Fund might have  to borrow money and incur
interest expense. Either occurrence would  adversely impact the amount of  daily
dividend  and could result in a decline in  the daily net asset value per share.
The Fund  will attempt  to  minimize these  risks  by investing  in  longer-term
securities  when it appears to management that interest rates on such securities
are not likely to increase substantially during the period of expected  holding,
and  then  only in  securities  of high  quality  which are  readily marketable.
However, there can be no assurance that the Fund will be successful in achieving
this or its other objectives.
 
    The foregoing investment policies are not fundamental and may be changed  by
the Board of Directors without shareholder vote.
 
    BROKERAGE  ALLOCATION. Brokerage commissions are not normally charged on the
purchase or sale of money market instruments, but such transactions may  involve
transaction  costs in the form of spreads between bid and asked prices. Pursuant
to an  order of  the Securities  and Exchange  Commission, the  Fund may  effect
principal  transactions  in certain  money market  instruments with  Dean Witter
Reynolds Inc. ("DWR"), a broker-dealer  affiliate of InterCapital. In  addition,
the Fund may incur brokerage commissions on transactions conducted through DWR.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    The  investment restrictions  listed below  are among  the restrictions that
have been adopted  by the  Fund as  fundamental policies.  Under the  Investment
Company  Act of 1940,  as amended (the  "Act"), a fundamental  policy may not be
changed without the vote of a  majority of the outstanding voting securities  of
the  Fund, as defined in the Act. For purposes of the following limitations: (i)
all percentage  limitations  apply  immediately  after  a  purchase  or  initial
investment, and (ii) any subsequent
 
                                       6
<PAGE>
change  in any applicable percentage resulting from market fluctuations or other
changes in total or net assets does not require elimination of any security from
the portfolio.
 
    The Fund may not:
 
        1. Borrow money, except from banks for
    temporary or emergency purposes or  to meet redemption requests which  might
    otherwise  require  the  untimely  disposition of  securities,  and  not for
    investment or leveraging, provided that  borrowing in the aggregate may  not
    exceed  10% of the  value of the  Fund's total assets  (including the amount
    borrowed) at the time of such borrowing; or mortgage, pledge or  hypothecate
    any  assets except in connection with any  such borrowing and in amounts not
    in excess of 10% of the value of the Fund's total assets at the time of such
    borrowing.
 
        2. Purchase securities of any issuer,
    except   for   securities   issued   by   U.S.   Government   agencies    or
    instrumentalities, having a record, together with predecessors, of less than
    three years' continuous operation, if, immediately after such purchase, more
    than  5% of the Fund's total assets  taken at market value would be invested
    in such securities.
 
        3. With respect to 75% of its total assets,
    purchase any securities, other than  obligations of the U.S. Government,  or
    its agencies or instrumentalities, if, immediately after such purchase, more
    than  5%  of the  value  of the  Fund's total  assets  would be  invested in
    securities of any  one issuer.  (However, as a  non-fundamental policy,  the
    Fund  will not invest more than 10% of its total assets in the securities of
    any one issuer. Futhermore, pursuant to current regulatory requirements, the
    Fund may only invest more than 5% of its total assets in the securities of a
    single issuer (and only with respect to  one issuer at a time) for a  period
    of  not  more than  three  business days  and  only if  the  securities have
    received the highest quality rating by at least two NRSROs.)
 
        4. Purchase any securities, other than
obligations of the U.S.  Government, or its  agencies or instrumentalities,  if,
    immediately after such purchase, more than 10% of the outstanding securities
    of  one issuer would be owned by the Fund (for this purpose all indebtedness
    of an issuer shall be deemed a single class of security).
 
        5. Purchase any securities, other than
    obligations of  banks  or  of  the  U.S.  Government,  or  its  agencies  or
    instrumentalities, if, immediately after such purchase, more than 25% of the
    value  of the  Fund's total  assets would be  invested in  the securities of
    issuers in  the  same  industry;  however, there  is  no  limitation  as  to
    investments  in bank obligations  or in obligations  issued or guaranteed by
    the U.S. Government or its agencies or instrumentalities.
 
        6. Invest more than 10% of its total assets
    in  illiquid  securities,  including  repurchase  agreements  which  have  a
    maturity  of  longer  than seven  days.  For purposes  of  this restriction,
    securities eligible for sale pursuant to Rule 144A under the Securities  Act
    are  not  considered illiquid  if  they are  determined  to be  liquid under
    procedures adopted by the Fund's Board of Directors.
 
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
offered by  DWR  and  other  dealers  who  have  entered  into  selected  dealer
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
their  purchase.  Stock  certificates will  not  be issued  unless  requested in
writing by the shareholder.
 
                                       7
<PAGE>
    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, NJ 07303. Checks should be made payable to Dean Witter Liquid
Asset Fund Inc.  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 No.  8900188413.  Wire  purchase
instructions  must include  the name of  the Fund and  the shareholder's account
number. Purchases made by check are normally effective within two business  days
for  checks drawn on  Federal Reserve System  member banks, and  longer for most
other checks. Wire purchases received by the Transfer Agent prior to 12:00 noon,
New York time, are normally effective that day and wire purchases received after
12:00 noon, New York time, are normally effective the next business day. Initial
investments must be at least $5,000,  although the Fund, at its discretion,  may
accept initial investments of smaller amounts, not less than $1,000. The minimum
initial   investment  under  an  Individual   Retirement  Account  or  Qualified
Retirement Plan for  which the Transfer  Agent acts as  custodian or trustee  is
$1,000.  Subsequent investments must be $100 or more and may be made through the
Transfer Agent. In case of investments pursuant to Systematic Payroll  Deduction
Plans  (including Individual Retirement Plans), the Fund, in its discretion, may
accept investments without regard to  any minimum amounts which would  otherwise
be  required, if the Fund has reason to believe that additional investments will
increase the investment in all accounts under such Plans to at least $5,000. The
Fund and the Distributor reserve the right to reject any purchase order.
 
    Sales personnel of a  Selected Broker-Dealer are  compensated for shares  of
the  Fund sold by  them by the Distributor  or any of  its affiliates and/or the
Selected Broker-Dealer.  In  addition,  some sales  personnel  of  the  Selected
Broker-Dealer  will receive  various types  of non-cash  compensation as special
sales incentives,  including trips,  educational  and/or business  seminars  and
merchandise.
 
    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 of  DWR or other Selected  Broker-Dealers 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 securities 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 credit cash balances in their DWR or
other Selected Broker-Dealer  securities 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 securities  accounts at DWR  or other  Selected
Broker-Dealers  will not have any  of such funds invested  in the Fund until the
business day  after the  customer places  an order  with DWR  or other  Selected
Broker-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 other  Selected  Broker-Dealer.
Accordingly,  DWR or other Selected Broker-Dealers 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
 
                                       8
<PAGE>
   
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 August 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  year will  not be  reimbursed by  the Fund  through
payments accrued in any subsequent fiscal year.
    
 
DETERMINATION OF NET ASSET VALUE
 
    The net asset value per share of the Fund is determined as of 4:00 p.m., New
York  time (or, on  days when the New  York Stock Exchange  closes prior to 4:00
p.m., at such earlier  time), on each  day that the New  York Stock Exchange  is
open  by taking the value of all assets of the Fund, subtracting its liabilities
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 although 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 shareholders'  DWR or  other Selected Broker-
Dealer brokerage account, within five days  after the date of the 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.
 
    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 Liquid Asset Fund Inc., 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.
 
    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.
 
    TAX  SHELTERED RETIREMENT PLANS.  Retirement plans are  available for use by
the self-employed,
 
                                       9
<PAGE>
Individual Retirement Accounts and Custodial Accounts under Section 403(b)(7) of
the Internal Revenue Code. Adoption of such  plans should be on advice of  legal
counsel or tax adviser.
 
    For  further information  regarding plan administration,  custodial fees and
other details,  investors should  contact their  DWR or  other Selected  Broker-
Dealer account executive or the Transfer Agent.
 
    SYSTEMATIC  PAYROLL DEDUCTION PLAN.  There is also  available to employers a
Systematic Payroll Deduction  Plan by which  their employees may  invest in  the
Fund.  For  further information,  investors should  contact  their DWR  or other
Selected Broker-Dealer account executive or the Transfer Agent.
 
   
    EXCHANGE PRIVILEGE.  An  "Exchange Privilege",  that  is, the  privilege  of
exchanging  shares of certain Dean  Witter Funds for shares  of the Fund, exists
whereby shares  of  various Dean  Witter  Funds which  are  open-end  investment
companies sold with either a front-end (at time of purchase) sales charge ("FESC
funds")  or a  contingent deferred (at  time of redemption)  sales charge ("CDSC
funds") may be  exchanged for shares  of the Fund,  Dean Witter U.S.  Government
Money  Market  Trust,  Dean  Witter Tax-Free  Daily  Income  Trust,  Dean Witter
California Tax-Free Daily Income Trust and Dean Witter 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
Growth  Fund, Dean Witter Balanced Income 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 Fund 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
Fund 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 Fund (calculated from  the last day of the month in
which the  Exchange Fund  shares were  acquired), the  holding period  (for  the
purpose  of determining  the rate of  the CDSC)  is frozen. If  those shares are
subsequently  reexchanged  for  shares  of  a  CDSC  fund,  the  holding  period
previously  frozen when the first  exchange was made resumes  on the last day of
the month in which shares of a CDSC fund are reacquired. Thus, the CDSC is based
upon the time (calculated as described above) the shareholder was invested in  a
CDSC  fund. However, in the case of shares exchanged into an Exchange Fund on or
after April 23, 1990, upon a redemption of shares which results in a CDSC  being
imposed,  a credit (not  to exceed the amount  of the CDSC) will  be given in an
amount equal to the Exchange Fund  12b-1 distribution fees, if any, incurred  on
or after that date which are attributable to those shares (see "Purchase of Fund
Shares  -- Plan of  Distribution" in the  respective Exchange Funds Prospectuses
for a description of Exchange Fund distribution fees). Exchanges involving  FESC
funds  or CDSC funds may be made after the  shares of the FESC fund or CDSC fund
acquired by purchase (not by exchange  or dividend reinvestment) have been  held
for  thirty days. There is no waiting period for exchanges of shares acquired by
exchange or dividend reinvestment.
    
 
    Exchange Privilege accounts may also  be maintained for shareholders of  the
money  market funds who acquired their shares  in exchange for shares of various
TCW/DW Funds, a  group of  funds distributed by  the Distributor  for which  TCW
Funds Management, Inc. serves as Adviser, under the
 
                                       10
<PAGE>
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  management to  be abusive and
contrary to  the  best  interests  of the  Fund's  other  shareholders  and,  at
management'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 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 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.
 
   
    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 account executive  (no
Exchange  Privilege  Authorization Form  is  required). Other  shareholders (and
those shareholders who are clients of DWR or another Selected Broker-Dealer  but
who  wish  to make  exchanges directly  by writing  or telephoning  the Transfer
Agent) must complete  and forward to  the Transfer Agent  an Exchange  Privilege
Authorization  Form, copies of which may be obtained from the Transfer Agent, to
initiate an exchange. If the Authorization  Form is used, exchanges may be  made
in  writing or by  contacting the Transfer Agent  at (800) 869-NEWS (toll-free).
The Fund will employ reasonable procedures to confirm that exchange instructions
communicated over  the  telephone  are  genuine.  Such  procedures  may  include
requiring  various  forms  of  personal  identification  such  as  name, mailing
address, social security  or other tax  identification number and  DWR or  other
Selected  Broker-Dealer account number (if any). Telephone instructions may also
be recorded. If such procedures are not employed, the Fund may be liable for any
losses due to unauthorized or fraudulent instructions.
    
 
    Telephone exchange instructions will be accepted if received by the Transfer
Agent between 9:00 a.m. and  4:00 p.m., New York time,  on any day the New  York
Stock  Exchange is  open. Any  shareholder wishing to  make an  exchange who has
previously filed an Exchange Privilege Authorization  Form and who is unable  to
reach  the Fund  by telephone should  contact his  or her DWR  or other Selected
Broker-Dealer account  executive, if  appropriate, or  make a  written  exchange
request.  Shareholders are  advised that during  periods of  drastic economic or
market changes it  is possible  that the  telephone exchange  procedures may  be
difficult  to implement, although this  has not been the  experience of the Dean
Witter Funds in the past.
 
                                       11
<PAGE>
    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
specifically specified on an Investment Application that all owners are required
to sign checks. Only shareholders having accounts in which no stock 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 stock
certificates have  been  issued will  be  permitted  to redeem  shares  by  wire
instructions.
 
    DWR  and any 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 stock certificates if any have been issued.
 
    Redemption  proceeds  will  be  mailed  to the  shareholder  at  his  or her
registered address or mailed or wired to his or her predesignated bank  account,
as  he or she may request. Proceeds of redemption may also be sent to some other
person, as requested by the shareholder.
 
GENERAL REDEMPTION REQUIREMENTS
 
    Written  requests  for   redemption  must  be   signed  by  the   registered
shareholder(s).  If  the  proceeds are  to  be  paid to  anyone  other  than the
registered shareholder(s) or sent  to any address  other than the  shareholder's
registered  address or predesignated bank account, signatures must be guaranteed
by an eligible guarantor acceptable to the
 
                                       12
<PAGE>
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 stock certificate, the request
for  redemption  must  be  accompanied  by the  stock  certificate  and  a stock
assignment form signed by the  registered shareholder(s) exactly as the  account
is  registered. Shareholders are advised, for  their own protection, to send the
stock 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 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, and 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
investment  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 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
Directors.
 
AUTOMATIC REDEMPTION PROCEDURE
 
    The Distributor has  instituted an automatic  redemption procedure which  it
may  utililize to satisfy amounts due by the 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, unless the shareholder elects not 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 other  Selected Broker-Dealer will
receive the  redemption  proceeds on  the  day following  the  redemption  date.
Shareholders will receive all dividends declared and reinvested through the date
of redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS  AND DISTRIBUTIONS. The  Fund declares dividends,  payable on each
day the New York Stock  Exchange is open for business,  of all of its daily  net
investment  income to  shareholders of  record as of  the close  of business the
preceding business day.  Dividends from  net short-term capital  gains, if  any,
will  be paid periodically. The amount of dividend may fluctuate from day to day
and may be omitted on some days  if net realized losses on portfolio  securities
exceed  the Fund's net  investment income. Dividends  from net long-term capital
gains, if  any, will  be paid  at  least annually.  Dividends are  declared  and
automatically  reinvested daily in additional full  and fractional shares of the
Fund (rounded to the last 1/100 of a share) at the net asset value per share  at
the close of business on that day. Any dividends declared in the last quarter of
any  calendar year which are paid in the following year prior to February 1 will
be deemed received by the shareholder in the prior year.
 
    Shareholders may  instruct the  Transfer Agent  (in writing)  to have  their
dividends paid out monthly in
 
                                       13
<PAGE>
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. 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.
 
    Stock 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  all of  its net  investment
income  and net capital gains, if any,  to shareholders and intends to otherwise
comply with all of the provisions of  Subchapter M of the Internal Revenue  Code
to  continue to qualify  as a regulated  investment company, it  is not expected
that the Fund will be required to pay any federal income tax.
 
    Distributions of net investment income  and realized net short-term  capital
gains,  if any,  are taxable to  shareholders who  are required to  pay taxes on
their income as ordinary income, whether such distributions are taken in cash or
reinvested in additional shares. Distributions of realized net long-term capital
gains, if any, are  taxable as long-term capital  gains, regardless of how  long
the  shareholder has held the Fund shares. No portion of such distributions will
be eligible for the federal dividends received deduction for corporations.
 
    The Fund advises  its shareholders  annually as  to the  federal income  tax
status  of distributions paid during each  calendar year. To avoid being subject
to  a  31%  federal  withholding   tax  on  taxable  dividends,  capital   gains
distributions and proceeds of redemptions, shareholders' taxpayer identification
numbers must be furnished and certified as to accuracy.
 
    Shareholders  are urged to consult their own tax advisers regarding specific
questions as to federal, state or local taxes.
 
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 period (which period will be
stated  in the  advertisement). This income  is then  annualized. 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's  current yield for  the seven days  ended August 31,  1996 was 5.04%. The
effective annual yield on 5.04% is  5.17%, assuming daily compounding. 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 the Fund are of common stock of $0.01 par value
and are  equal  as to  earnings,  assets and  voting  privileges. There  are  no
conversion,   pre-emptive  or  other  subscription   rights.  In  the  event  of
liquidation, each share of common stock of  the Fund is entitled to its  portion
of  all of the  Fund's assets after all  debts and expenses  have been paid. The
shares do not have cumulative voting rights.
    Under ordinary circumstances, the Fund is not required, nor does it  intend,
to hold Annual Meetings of Stockholders. The Directors may call Special Meetings
of  Stockholders for action by stockholder vote as may be required by the Act or
the Fund's By-Laws.
 
   
    CODE OF  ETHICS. Directors,  officers and  employees of  InterCapital,  Dean
Witter Services Company Inc. and the Distributor are subject to a strict Code of
Ethics adopted by those companies. The Code of Ethics is intended to ensure that
the interests of shareholders and other clients are placed ahead of any personal
interest,  that no undue personal benefit is obtained from a person's employment
activities and that actual and potential  conflicts of interest are avoided.  To
achieve  these goals and comply with regulatory requirements, the Code of Ethics
re-
quires, among other things, that  personal securities transactions by  employees
of  the companies be subject to an  advance clearance process to monitor that no
Dean Witter Fund is engaged at the same  time in a purchase or sale of the  same
security.  The Code  of Ethics  bans the  purchase of  securities in  an initial
public offering, and also prohibits engaging in futures and options transactions
and profiting on short-term trading (that is, a purchase within sixty
    
 
                                       14
<PAGE>
   
REMOVE APPLICATION CAREFULLY
 
                                                         160--
                                                         for office use only
  
                                                                 DEAN WITTER
                                                                 LIQUID
                                                                 ASSET
                                                                 FUND  [LOGO]
APPLICATION
 
DEAN WITTER LIQUID ASSET FUND INC.
Send to: Dean Witter Trust Company (the "Transfer Agent"), P.O. Box 1040, Jersey
City, NJ 07303

<TABLE>
<CAPTION>
<S><C>
- ----------------------------------------------------------------------------------------------------------------------------------
 INSTRUCTIONS    For assistance in completing this application, telephone Dean Witter Trust Company at (800) 869-NEWS (toll-free).
- ----------------------------------------------------------------------------------------------------------------------------------
 TO REGISTER
 SHARES               1.
 (please print)         ---------------------------------------------------------------------------------
                            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         

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


                                                                             ----------------------------
                         If Trust, Date of Trust Instrument:-------------      Tax Identification Number
- ----------------------------------------------------------------------------------------------------------------------------------


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

 ADDRESS                 ----------------------------------------------------------------------------------
                         City                               State                                Zip Code
- ----------------------------------------------------------------------------------------------------------------------------------

TO PURCHASE              / / CHECK (enclosed) $ -------------------- (Make SHARES: Payable to Dean Witter Liquid Asset Fund Inc.)
Minimum Initial          / / WIRE*  On ----          MF* ----
Investment:
$5,000                            (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 Liquid Asset Fund Inc.

                         Account Of:
                                    -----------------------------------------------------------------------
                                     (Investor's Account as Registered at the Transfer Agent)
 
                         Control or Account Number:
                                                    -------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------------
                                                 OPTIONAL SERVICES
- ----------------------------------------------------------------------------------------------------------------------------------

                         NOTE: If you are a current shareholder of Dean Witter Liquid Asset Fund Inc., please indicate your fund
                         account number here. [1] [6] [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)
WITHDRAWAL            $ ------------------ / / Monthly or / / Quarterly
PLAN                  / / 10th    or / / 25th of Month/Quarter
Minimum               / / Pay shareholder(s) at address of record.
Account Value:        / / Pay to the following: (If this payment option
$5,000                is selected a signature guarantee is required)
 
                         ----------------------------------------------------------------------------------
                         Name
                         ----------------------------------------------------------------------------------
                         Address
                         ----------------------------------------------------------------------------------
                         City                             State                               Zip Code
 
<PAGE>

PAYMENT TO               / /  Dean Witter Trust Company is hereby authorized to
PREDESIGNATED                 honor telephonic or other instructions, without signature
BANK ACCOUNT                  guarantee, from any person for the redemption of any or all
                              shares of Dean Witter Liquid  Asset Fund Inc. held in
                              my (our) account provided that proceeds are transmitted only 
                              to  the  following  bank  account. (Absent its own negligence, 
                              neither Dean Witter Liquid Asset Fund Inc. nor Dean Witter Trust  
                              333Company shall be liable for any redemption caused by unauthorized
                              instruction(s)):

Bank Account must        -------------------------------------------------   ------------------------------
be in same name as        NAME & BANK ACCOUNT NUMBER                           BANK'S ROUTING TRANSMIT CODE
shares are registered                                                                 (ASK YOUR BANK)

Minimum Amount:          -------------------------------------------------
$1,000                   NAME OF BANK
                         -------------------------------------------------
                         ADDRESS OF BANK
                          (  )
                         -------------------------------------------------
                         TELEPHONE NUMBER OF BANK
- ----------------------------------------------------------------------------------------------------------------------------------
                                    SIGNATURE AUTHORIZATION
- ----------------------------------------------------------------------------------------------------------------------------------
                    NOTE: RETAIN A COPY OF THIS DOCUMENT FOR YOUR RECORDS.  ANY
I. FOR ALL          MODIFICATION  OF  THE  INFORMATION  BELOW  WILL  REQUIRE AN
   ACCOUNTS         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 Liquid  Asset
                    Fund  Inc. (the "Fund") in  affecting 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  Liquid Asset Fund  Inc. and I(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.)
 
                    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              SIGNED THIS   DAY OF               , 19  .
application
 

In addition complete
Section A or B
below
                   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 Fund for the Registered Owner and to execute 
                   and deliver any instrument  necessary to effectuate  the authority 
                   hereby conferred:
                   
                                         NAME/TITLE                               SIGNATURE

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

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

                   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
CORPORATIONS AND   SEAL IS REQUIRED.
INCORPORATED
ASSOCIATIONS       I, ____________________, Secretary of the Registered Owner, do hereby certify
ONLY.              that at a meeting on _________________ at which a quorum was present         
SIGN ABOVE AND     throughout, the Board of Directors of the corporation/the officers of the    
COMPLETE THIS      association duly adopted a resolution, which is in full force and effect and 
SECTION            in accordance with the Registered Owner's charter and by-laws, which         
                   resolution did the following: (1) empowered the above-named Authorized       
                   Person(s) to effect securities 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
                   executed amendment to the Certification Form.                                 
                   
SIGNATURE
GUARANTEED**       Witness my hand on behalf of the corporation/association  this ___________ day 
(or Corporate      of                         , 19    .
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
GUARANTEED**                                             --------------------------------------------------
(or Corporate                                               Certifying Officer of the Corporation or 
Seal)                                                               Incorporated Association**
                                                      
- ----------------------------------------------------------------------------------------------------------------------------------
SECTION (B)        NOTE: A SIGNATURE GUARANTEE IS REQUIRED.
ALL OTHER
INSTITUTIONAL
INVESTORS
 
SIGNATURE                  ----------------------------------------------------------------------------------------
GUARANTEED**                                                 Certifying
                                              Trustee(s)/General Partner(s)/Other(s)**
SIGN ABOVE AND             ----------------------------------------------------------------------------------------
COMPLETE THIS                                                Certifying
SECTION                                       Trustee(s)/General Partner(s)/Other(s)**
 
                           Signed this   day of                 ,19   

                           ----------------------------------------------------------------------------------------
                            **SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR
- ----------------------------------------------------------------------------------------------------------------------------------
DEALER             Above signature(s) guaranteed. Prospectus has been delivered by undersigned to above-named
(if any)          applicant(s).
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
                                                           
</TABLE>
- -Registered Trademark- 1996 Dean Witter Distributors Inc.

    
<PAGE>
   
days  of a sale  or a sale  within sixty days  of a purchase)  of a security. In
addition, investment personnel  may not purchase  or sell a  security for  their
personal  account within thirty days before or after any transaction in any Dean
Witter Fund managed by them. Any violations of the Code of Ethics are subject to
sanctions,  including  reprimand,  demotion  or  suspension  or  termination  of
employment.  The Code  of Ethics comports  with regulatory  requirements and the
recommendations in the 1994 report by the Investment Company Institute  Advisory
Group on Personal Investing.
    
 
    STOCKHOLDER  INQUIRIES. All inquiries regarding  the Fund should be directed
to the Fund at one of the telephone  numbers or at the address set forth on  the
front cover of this Prospectus.
 
                                       15
<PAGE>
   
DEAN WITTER LIQUID ASSET FUND INC.
REPORT OF INDEPENDENT ACCOUNTANTS
 
TO THE SHAREHOLDERS AND BOARD
OF DIRECTORS OF DEAN WITTER LIQUID ASSET FUND INC.
 
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 on page 3 of this
Prospectus) present fairly, in all material respects, the financial position of
Dean Witter Liquid Asset Fund Inc. (the "Fund") at August 31, 1996, the results
of its operations for the year then ended, the changes in its net assets for
each of the two years in the period then ended and the financial highlights for
each of the ten years in the period then ended, in conformity with generally
accepted accounting principles. These financial statements and financial
highlights (hereafter referred to as "financial statements") are the
responsibility of the Fund's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these financial statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits, which included confirmation of securities at August 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
OCTOBER 7, 1996
    
 
                                       16
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
PORTFOLIO OF INVESTMENTS AUGUST 31, 1996
 
   
<TABLE>
<CAPTION>
                                                                   ANNUALIZED
 PRINCIPAL                     DESCRIPTION                           YIELD
 AMOUNT IN                         AND                             ON DATE OF
 THOUSANDS                    MATURITY DATE                         PURCHASE              VALUE
- ------------------------------------------------------------------------------------------------------
<C>          <S>                                               <C>                 <C>
             COMMERCIAL PAPER (76.6%)
             AUTOMOTIVE - FINANCE (7.7%)
 $ 335,000   Ford Motor Credit Co.
             10/03/96 - 02/04/97.............................     5.46 - 5.57%     $       331,772,439
   547,000   General Motors Acceptance Corp.
             09/13/96 - 02/24/97.............................     5.43 - 5.85              539,882,651
                                                                                   -------------------
                                                                                           871,655,090
                                                                                   -------------------
             BANK HOLDING COMPANIES (14.3%)
   120,000   BankAmerica Corp.
             09/20/96 - 09/26/96.............................         5.48                 119,550,000
   150,000   Chase Manhattan Corp.
             09/05/96 - 10/07/96.............................     5.44 - 5.52              149,647,070
    10,000   Corestates Capital Corp. 09/30/96...............         5.38                   9,956,000
   465,000   Morgan (J.P.) & Co. Inc.
             09/06/96 - 01/03/97.............................     5.21 - 5.61              462,937,883
    50,000   Mellon Financial Co. 02/06/97...................         5.54                  48,809,708
   305,000   NationsBank Corp.
             09/24/96 - 02/28/97.............................     5.42 - 5.75              302,058,096
   220,000   PNC Funding Corp.
             09/06/96 - 10/23/96.............................     5.36 - 5.57              219,058,111
   300,000   Republic New York Corp.
             09/11/96 - 12/13/96.............................     5.37 - 5.65              298,280,931
    15,000   U.S. Bancorp 09/05/96...........................         5.47                  14,988,750
                                                                                   -------------------
                                                                                         1,625,286,549
                                                                                   -------------------
             BANKS - COMMERCIAL (33.7%)
   464,000   Abbey National North America Corp.
             09/16/96 - 02/24/97.............................     5.42 - 5.66              458,561,858
   250,000   ABN-AMRO North America Finance Inc.
             09/03/96 - 12/20/96.............................     5.12 - 5.53              247,285,725
   380,000   Canadian Imperial Holdings Inc.
             09/05/96 - 11/12/96.............................     5.37 - 5.55              377,152,078
   200,000   Commerzbank U.S. Finance Inc.
             10/09/96 - 02/20/97.............................         5.55                 196,812,417
   555,000   Deutsche Bank Financial Inc.
             09/27/96 - 02/03/97.............................     5.36 - 5.66              546,041,353
   542,000   Dresdner U.S. Finance Inc.
             09/19/96 - 02/14/97.............................     5.41 - 5.74              534,744,662
   555,000   National Australia Funding (DE) Inc.
             11/06/96 - 02/27/97.............................     5.40 - 5.56              544,459,365
   145,000   SBC Finance (DE) Inc. 12/27/96..................         5.64                 142,395,478
   545,000   Toronto-Dominion Holdings USA Inc.
             09/10/96 - 12/24/96.............................     5.14 - 5.56              541,658,826
    50,000   Union Commercial Funding Corp. 11/01/96.........         5.49                  49,539,306
   210,000   Westpac Capital Corp.
             10/08/96 - 01/14/97.............................     5.50 - 5.70              207,235,461
                                                                                   -------------------
                                                                                         3,845,886,529
                                                                                   -------------------
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       17
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
PORTFOLIO OF INVESTMENTS AUGUST 31, 1996, CONTINUED
 
   
<TABLE>
<CAPTION>
                                                                   ANNUALIZED
 PRINCIPAL                     DESCRIPTION                           YIELD
 AMOUNT IN                         AND                             ON DATE OF
 THOUSANDS                    MATURITY DATE                         PURCHASE              VALUE
- ------------------------------------------------------------------------------------------------------
<C>          <S>                                               <C>                 <C>
             BROKERAGE (2.7%)
 $ 215,000   Goldman Sachs Group L.P.
             10/08/96 - 10/24/96.............................     5.53 - 5.54%     $       213,419,347
    95,000   Morgan Stanley Group, Inc.
             10/15/96 - 11/25/96.............................     5.35 - 5.38               94,098,375
                                                                                   -------------------
                                                                                           307,517,722
                                                                                   -------------------
             DRUGS (0.3%)
    32,000   Warner-Lambert Co. 10/31/96.....................         5.48                  31,707,200
                                                                                   -------------------
             FINANCE - COMMERCIAL (1.4%)
   160,000   CIT Group Holdings, Inc.
             09/13/96 - 10/22/96.............................     5.39 - 5.52              159,187,865
                                                                                   -------------------
             FINANCE - CONSUMER (6.0%)
   390,000   American Express Credit Corp.
             09/27/96 - 11/29/96.............................     5.36 - 5.43              386,026,111
   125,000   Avco Financial Services Inc.
             10/31/96 - 11/22/96.............................     5.37 - 5.42              123,672,704
    30,000   Beneficial Corp. 12/30/96.......................         5.43                  29,462,558
   145,000   Household Finance Corp.
             10/02/96 - 01/30/97.............................     5.42 - 5.51              143,096,489
                                                                                   -------------------
                                                                                           682,257,862
                                                                                   -------------------
             FINANCE - DIVERSIFIED (5.0%)
   165,000   Associates Corp. of North America
             09/16/96 - 11/25/96.............................     5.36 - 5.43              163,717,456
   417,000   General Electric Capital Corp.
             09/19/96 - 03/03/97.............................     5.25 - 5.63              410,471,919
                                                                                   -------------------
                                                                                           574,189,375
                                                                                   -------------------
             FOODS & BEVERAGES (1.7%)
   100,000   Coca-Cola Co. 10/07/96 - 10/09/96...............     5.44 - 5.54               99,428,542
   100,000   Heinz (H.J.) Co. 12/19/96.......................         5.65                  98,322,500
                                                                                   -------------------
                                                                                           197,751,042
                                                                                   -------------------
             INSURANCE (0.2%)
    20,000   AIG Funding Inc. 03/17/97.......................         5.62                  19,400,500
                                                                                   -------------------
             OFFICE EQUIPMENT (3.3%)
    40,000   Hewlett-Packard Co.
             09/30/96........................................         5.45                  39,821,000
   255,000   IBM Credit Corp.
             09/10/96 - 11/25/96.............................     5.35 - 5.49              253,930,358
    50,000   International Business Machines Corp.
             10/01/96........................................         5.33                  49,772,236
    35,000   Xerox Credit Corp. 12/12/96.....................         5.42                  34,467,261
                                                                                   -------------------
                                                                                           377,990,855
                                                                                   -------------------
             RETAIL (0.3%)
    40,000   Sears Roebuck Acceptance Corp.
             10/07/96 - 10/23/96.............................     5.46 - 5.53               39,736,378
                                                                                   -------------------
             TOTAL COMMERCIAL PAPER
             (AMORTIZED COST $8,732,566,967).....................................        8,732,566,967
                                                                                   -------------------
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       18
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
PORTFOLIO OF INVESTMENTS AUGUST 31, 1996, CONTINUED
 
   
<TABLE>
<CAPTION>
                                                                   ANNUALIZED
 PRINCIPAL                     DESCRIPTION                           YIELD
 AMOUNT IN                         AND                             ON DATE OF
 THOUSANDS                    MATURITY DATE                         PURCHASE              VALUE
- ------------------------------------------------------------------------------------------------------
<C>          <S>                                               <C>                 <C>
             SHORT-TERM BANK NOTES (11.3%)
 $ 200,000   Bank of America (Illinois)
             10/08/96 - 10/22/96.............................     5.54 - 5.55%     $       200,000,000
   230,000   F.C.C. National Bank
             09/10/96 - 11/05/96.............................     5.43 - 5.56              230,000,000
    25,000   Fifth Third Bancorp of NW Ohio N.A.
             10/09/96........................................         5.40                  25,000,000
   315,000   First National Bank of Boston
             10/01/96 - 10/30/96.............................     5.38 - 5.42              315,000,000
    50,000   First National Bank of Chicago 11/26/96.........         5.45                  50,000,000
   195,000   First Union National Bank
             09/03/96 - 10/31/96.............................     5.37 - 5.47              195,000,000
   200,000   La Salle National Bank
             09/05/96 - 12/26/96.............................     5.40 - 5.61              200,000,000
    70,000   NationsBank, N.A. (Carolinas)
             09/09/96 - 10/07/96.............................     5.50 - 5.55               70,000,000
                                                                                   -------------------
             TOTAL SHORT-TERM BANK NOTES
             (AMORTIZED COST $1,285,000,000).....................................        1,285,000,000
                                                                                   -------------------
             CERTIFICATES OF DEPOSIT (7.8%)
   280,000   Chase Manhattan Bank (USA)
             09/20/96 - 02/25/97.............................     5.40 - 5.75              280,000,000
   195,000   Mellon Bank, N.A.
             10/16/96 - 12/24/96.............................     5.55 - 5.63              195,000,000
   410,000   Union Bank of California, N.A.
             09/11/96 - 02/05/97.............................     5.40 - 5.78              410,000,000
                                                                                   -------------------
             TOTAL CERTIFICATES OF DEPOSIT
             (AMORTIZED COST $885,000,000).......................................          885,000,000
                                                                                   -------------------
             U.S. GOVERNMENT & AGENCIES OBLIGATIONS (3.5%)
   130,000   Federal Home Loan Banks
             09/18/96 - 12/30/96.............................     5.28 - 5.47              129,210,100
   120,000   Federal National Mortgage Assoc.
             09/18/96 - 10/10/96.............................     5.34 - 5.42              119,461,611
   160,000   U.S. Treasury Bills
             02/06/97 - 03/06/97.............................     5.06 - 5.14              156,302,017
                                                                                   -------------------
             TOTAL U.S. GOVERNMENT & AGENCIES OBLIGATIONS
             (AMORTIZED COST $404,973,728).......................................          404,973,728
                                                                                   -------------------
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       19
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
PORTFOLIO OF INVESTMENTS AUGUST 31, 1996, CONTINUED
 
   
<TABLE>
<CAPTION>
                                                                   ANNUALIZED
 PRINCIPAL                     DESCRIPTION                           YIELD
 AMOUNT IN                         AND                             ON DATE OF
 THOUSANDS                    MATURITY DATE                         PURCHASE              VALUE
- ------------------------------------------------------------------------------------------------------
<C>          <S>                                               <C>                 <C>
             BANKERS' ACCEPTANCES (1.3%)
 $  95,000   Chase Manhattan Bank, N.A.
             09/10/96 - 02/13/97.............................     5.37 - 5.69%     $        93,727,418
    52,000   Corestates Bank, N.A.
             10/11/96 - 01/27/97.............................     5.35 - 5.70               51,219,551
                                                                                   -------------------
 
             TOTAL BANKERS' ACCEPTANCES
             (AMORTIZED COST $144,946,969).......................................          144,946,969
                                                                                   -------------------
 
             REPURCHASE AGREEMENT (0.1%)
     8,377   The Bank of New York due 09/03/96 (dated
             08/30/96; proceeds $8,382,258; collateralized by
             $8,755,229 Federal Home Loan Mortgage Corp.
             11.00% due 07/25/18 valued at $8,545,037)
             (Identified Cost $8,377,487)....................        5.125                   8,377,487
                                                                                   -------------------
 
TOTAL INVESTMENTS
(AMORTIZED COST $11,460,865,151) (A)......      100.6%  11,460,865,151
 
LIABILITIES IN EXCESS OF CASH AND OTHER
ASSETS....................................       (0.6)     (71,396,501)
                                                -----   --------------
 
NET ASSETS................................      100.0%  $11,389,468,650
                                                -----   --------------
                                                -----   --------------
 
<FN>
- ---------------------
(a)  Cost is the same for federal income tax purposes.
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       20
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
FINANCIAL STATEMENTS
 
STATEMENT OF ASSETS AND LIABILITIES
AUGUST 31, 1996
 
   
<TABLE>
<S>                                                           <C>
ASSETS:
Investments in securities, at value
  (amortized cost $11,460,865,151)..........................  $11,460,865,151
Cash........................................................           89,999
Receivable for:
    Interest................................................       22,825,928
    Capital stock sold......................................           33,380
Prepaid expenses and other assets...........................          180,265
                                                              ---------------
 
     TOTAL ASSETS...........................................   11,483,994,723
                                                              ---------------
 
LIABILITIES:
Payable for:
    Capital stock repurchased...............................       88,171,043
    Investment management fee...............................        2,586,448
    Plan of distribution fee................................          938,268
Accrued expenses and other payables.........................        2,830,314
                                                              ---------------
 
     TOTAL LIABILITIES......................................       94,526,073
                                                              ---------------
 
NET ASSETS:
Paid-in-capital.............................................   11,388,779,903
Accumulated undistributed net investment income.............          688,747
                                                              ---------------
 
     NET ASSETS.............................................  $11,389,468,650
                                                              ---------------
                                                              ---------------
 
NET ASSET VALUE PER SHARE,
  11,389,451,097 SHARES OUTSTANDING (25,000,000,000 SHARES
  AUTHORIZED OF $.01 PAR VALUE).............................
                                                                        $1.00
                                                              ---------------
                                                              ---------------
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       21
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF OPERATIONS
FOR THE YEAR ENDED AUGUST 31, 1996
 
<TABLE>
<S>                                                           <C>
NET INVESTMENT INCOME:
 
INTEREST INCOME.............................................  $626,139,047
                                                              ------------
 
EXPENSES
Investment management fee...................................    30,669,867
Transfer agent fees and expenses............................    26,264,255
Plan of distribution fee....................................    10,716,020
Registration fees...........................................       778,253
Shareholder reports and notices.............................       549,793
Custodian fees..............................................       350,439
Professional fees...........................................        71,169
Directors' fees and expenses................................        16,452
Other.......................................................        91,193
                                                              ------------
 
     TOTAL EXPENSES.........................................    69,507,441
                                                              ------------
 
NET INVESTMENT INCOME AND NET INCREASE......................  $556,631,606
                                                              ------------
                                                              ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       22
<PAGE>
DEAN WITTER LIQUID ASSET FUND INC.
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                                               FOR THE YEAR    FOR THE YEAR
                                                                  ENDED           ENDED
                                                                AUGUST 31,      AUGUST 31,
                                                                   1996            1995
- --------------------------------------------------------------------------------------------
<S>                                                           <C>             <C>
 
INCREASE (DECREASE) IN NET ASSETS:
 
OPERATIONS:
Net investment income and net increase......................  $  556,631,606  $  497,349,607
Dividends from net investment income........................    (556,625,540)   (497,395,126)
Net increase from capital stock transactions................   1,029,986,565   1,867,938,438
                                                              --------------  --------------
 
     TOTAL INCREASE.........................................   1,029,992,631   1,867,892,919
 
NET ASSETS:
Beginning of period.........................................  10,359,476,019   8,491,583,100
                                                              --------------  --------------
 
     END OF PERIOD
    (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF
    $688,747 AND $682,681, RESPECTIVELY)....................  $11,389,468,650 $10,359,476,019
                                                              --------------  --------------
                                                              --------------  --------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       23
<PAGE>
   
DEAN WITTER LIQUID ASSET FUND INC.
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1996
 
1. ORGANIZATION AND ACCOUNTING POLICIES
 
Dean Witter Liquid Asset Fund Inc. (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 objectives are
high current income, preservation of capital and liquidity. The Fund was
incorporated in Maryland on September 3, 1974 and commenced operations on
September 22, 1975.
 
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.
Discounts are accreted and premiums are amortized over the life of the
respective securities. Interest income is accrued daily.
 
C. FEDERAL INCOME TAX STATUS -- It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable income to its shareholders.
Accordingly, no federal income tax provision is required.
 
D. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and
distributions 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 $1 billion; 0.35% to the portion of the
daily net assets exceeding $1 billion but not exceeding $1.35 billion; 0.325% to
the portion of the daily net assets exceeding $1.35 billion but not exceeding
$1.75 billion; 0.30% to the portion of the daily net assets exceeding $1.75
billion but not exceeding
    
 
                                       24
<PAGE>
   
DEAN WITTER LIQUID ASSET FUND INC.
NOTES TO FINANCIAL STATEMENTS AUGUST 31, 1996, CONTINUED
 
$2.15 billion; 0.275% to the portion of the daily net assets exceeding $2.15
billion but not exceeding $2.5 billion; 0.25% to the portion of the daily net
assets exceeding $2.5 billion but not exceeding $15 billion; 0.249% to the
portion of the daily net assets exceeding $15 billion but not exceeding $17.5
billion; and 0.248% to the portion of the daily net assets exceeding $17.5
billion.
 
Under the terms of the Agreement, 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 Directors determine to reimburse, as described below. The following
activities and services may be provided by the Distributor, Dean Witter Reynolds
Inc. ("DWR"), an affiliate of the Investment Manager and Distributor, its
affiliates and other dealers who have entered into selected dealer agreements
with the Distributor under the Plan: (1) compensation to, and expenses of,
account executives of DWR, other employees and selected broker-dealers,
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) preparation, printing 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 August 31,
1996, the distribution fee was accrued at the annual rate of 0.10%.
    
 
                                       25
<PAGE>
   
DEAN WITTER LIQUID ASSET FUND INC.
NOTES TO FINANCIAL STATEMENTS AUGUST 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 August 31, 1996 aggregated $39,035,358,131 and
$38,557,393,044, respectively.
 
Dean Witter Trust Company, an affiliate of the Investment Manager and
Distributor, is the Fund's transfer agent. At August 31, 1996, the Fund had
transfer agent fees and expenses payable of approximately $2,330,000.
 
The Fund had an unfunded noncontributory defined benefit pension plan covering
all independent Directors of the Fund who will have served as independent
Directors/Trustees for at least five years at the time of retirement. Benefits
under this plan are based on years of service and compensation during the last
five years of service. Aggregate pension costs for the year ended August 31,
1996 included in Directors' fees and expenses in the Statement of Operations
amounted to $928. At August 31, 1996, the Fund had an accrued pension liability
of $49,402 which is included in accrued expenses in the Statement of Assets and
Liabilities.
 
5. CAPITAL STOCK
 
Transactions in capital stock, at $1.00 per share, were as follows:
 
<TABLE>
<CAPTION>
                                                FOR THE YEAR        FOR THE YEAR
                                                   ENDED               ENDED
                                              AUGUST 31, 1996     AUGUST 31, 1995
                                              ----------------    ----------------
<S>                                           <C>                 <C>
Shares sold................................    31,284,601,651      28,802,984,447
Shares issued in reinvestment of
 dividends.................................       554,968,386         495,919,572
                                              ----------------    ----------------
                                               31,839,570,037      29,298,904,019
Shares repurchased.........................   (30,809,583,472)    (27,430,965,581)
                                              ----------------    ----------------
Net increase...............................     1,029,986,565       1,867,938,438
                                              ----------------    ----------------
                                              ----------------    ----------------
</TABLE>
 
6. FINANCIAL HIGHLIGHTS
 
See the "Financial Highlights" table on page 3 of this Prospectus.
    
 
                                       26
<PAGE>
                        THE DEAN WITTER FAMILY OF FUNDS
 
   
<TABLE>
<S>                                                    <C>
MONEY MARKET FUNDS                                     FIXED INCOME FUNDS
Dean Witter Liquid Asset Fund Inc.                     Dean Witter High Yield Securities Inc.
Dean Witter U.S. Government Money Market Trust         Dean Witter Tax-Exempt Securities Trust
Dean Witter Tax-Free Daily Income Trust                Dean Witter U.S. Government Securities Trust
Dean Witter California Tax-Free Daily Income Trust     Dean Witter Federal Securities Trust
Dean Witter New York Municipal Money Market Trust      Dean Witter Convertible Securities Trust
                                                       Dean Witter California Tax-Free Income Fund
EQUITY FUNDS                                           Dean Witter New York Tax-Free Income Fund
Dean Witter American Value Fund                        Dean Witter World Wide Income Trust
Dean Witter Natural Resource Development Securities    Dean Witter Intermediate Income Securities
Inc.                                                   Dean Witter Global Short-Term Income Fund Inc.
Dean Witter Dividend Growth Securities Inc.            Dean Witter Multi-State Municipal Series Trust
Dean Witter Developing Growth Securities Trust         Dean Witter Premier Income Trust
Dean Witter World Wide Investment Trust                Dean Witter Short-Term U.S. Treasury Trust
Dean Witter Value-Added Market Series                  Dean Witter Diversified Income Trust
Dean Witter Utilities Fund                             Dean Witter Limited Term Municipal Trust
Dean Witter Capital Growth Securities                  Dean Witter Short-Term Bond Fund
Dean Witter European Growth Fund Inc.                  Dean Witter High Income Securities
Dean Witter Precious Metals and Minerals Trust         Dean Witter National Municipal Trust
Dean Witter Pacific Growth Fund Inc.                   Dean Witter Balanced Income Fund
Dean Witter Health Sciences Trust                      Dean Witter Hawaii Municipal Trust
Dean Witter Global Dividend Growth Securities          Dean Witter Intermediate Term U.S. Treasury
Dean Witter Global Utilities Fund                      Trust
Dean Witter International SmallCap Fund
Dean Witter Mid-Cap Growth Fund                        DEAN WITTER RETIREMENT SERIES
Dean Witter Balanced Growth Fund                       Liquid Asset Series
Dean Witter Capital Appreciation Fund                  U.S. Government Money Market Series
Dean Witter Information Fund                           U.S. Government Securities Series
Dean Witter Japan Fund                                 Intermediate Income Securities Series
Dean Witter Income Builder Fund                        American Value Series
Dean Witter Special Value Fund                         Capital Growth Series
                                                       Dividend Growth Series
ASSET ALLOCATION FUNDS                                 Strategist Series
Dean Witter Strategist Fund                            Utilities Series
Dean Witter Global Asset Allocation Fund               Value-Added Market Series
ACTIVE ASSETS ACCOUNT PROGRAM                          Global Equity Series
Active Assets Money Trust
Active Assets Tax-Free Trust
Active Assets California Tax-Free Trust
Active Assets Government Securities Trust
</TABLE>
    
 
<PAGE>
Dean Witter
Liquid Asset Fund Inc.
Two World Trade Center
New York, New York 10048
 
BOARD OF DIRECTORS
 
   
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
 
Sheldon Curtis
Vice President, Secretary and
General Counsel
 
Jonathan R. Page
Vice President
 
Thomas F. Caloia
Treasurer
 
CUSTODIAN
 
The Bank of New York
90 Washington Street
New York, New York 10286
 
TRANSFER AGENT AND
DIVIDEND DISBURSING AGENT
 
Dean Witter Trust Company
Harborside Financial Center
Plaza Two
Jersey City, New Jersey 07311
 
INDEPENDENT ACCOUNTANTS
 
Price Waterhouse LLP
1177 Avenue of the Americas
New York, New York 10036
 
INVESTMENT MANAGER
Dean Witter InterCapital Inc.
 
Dean Witter
 
Liquid Asset Fund
 
   
                                                                      Prospectus
                                                                October 18, 1996
    
<PAGE>
STATEMENT OF ADDITIONAL INFORMATION
                                                    DEAN WITTER
                                                    LIQUID ASSET FUND INC.
   
OCTOBER 18, 1996
    
 
- ----------------------------------------------------------------------------
 
   
    Dean  Witter Liquid Asset Fund Inc.  (the "Fund") is an open-end diversified
management investment  company  whose  investment objectives  are  high  current
income,  preservation of  capital and liquidity.  The Fund seeks  to achieve its
objectives by investing in the following money market instruments: United States
Government securities, obligations of U.S. regulated banks and savings and  loan
associations  having assets of $1 billion  or more, high grade commercial paper,
Certificates of Deposit of $100,000 or less of U.S. regulated banks and  savings
institutions having total assets of less than $1 billion which are fully insured
as  to principal by the Federal  Deposit Insurance Corporation (the interest may
not be insured) and high grade corporate obligations maturing in thirteen months
or less. (See "Investment Practices and Policies.")
    
 
    The Fund  is  authorized to  reimburse  for 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 of the Fund  dated October 18, 1996,  which provides the basic
information you  should know  before  investing in  the  Fund, may  be  obtained
without  charge by request of the Fund at its address or at one of the telephone
numbers listed below or  from the Fund's  Distributor, Dean Witter  Distributors
Inc.,  from Dean Witter Reynolds  Inc. at any of its  branch offices or from any
Selected Broker-Dealer.  This  Statement  of Additional  Information  is  not  a
Prospectus.  It contains information in addition  to and more detailed than that
set forth in the  Prospectus. It is intended  to provide additional  information
regarding  the activities  and operations  of the  Fund, and  should be  read in
conjunction with the Prospectus.
    
 
Dean Witter
Liquid Asset Fund Inc.
Two World Trade Center
New York, New York 10048
 
212-392-2550 or
   
800-869-NEWS (toll-free)
    
<PAGE>
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>                                                                                      <C>
The Fund and its Management............................................................          3
Directors and Officers.................................................................          6
Investment Practices and Policies......................................................         12
Investment Restrictions................................................................         14
Portfolio Transactions and Brokerage...................................................         15
Purchase of Fund Shares................................................................         16
Redemption of Fund Shares..............................................................         24
Dividends, Distributions and Taxes.....................................................         25
Description of Common Stock............................................................         26
Custodian and Transfer Agent...........................................................         26
Independent Accountants................................................................         27
Reports to Shareholders................................................................         27
Legal Counsel..........................................................................         27
Experts................................................................................         27
Registration Statement.................................................................         27
Financial Statements...................................................................         27
Appendix/Ratings.......................................................................         28
</TABLE>
    
 
                                       2
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
THE FUND
 
    The Fund was incorporated under Maryland law on September 3, 1974, under the
name  Standard &  Poor's/InterCapital Cash  Management Fund,  Inc. Its  name was
changed to Standard  & Poor's/InterCapital Liquid  Asset Fund, Inc.  on May  13,
1975;  changed  to InterCapital  Liquid Asset  Fund Inc.  on September  1, 1977;
changed to  Dean Witter/Sears  Liquid Asset  Fund Inc.  on March  21, 1983;  and
changed  to its present  name, Dean Witter  Liquid Asset Fund  Inc., on June 30,
1993.
 
   
    As of August 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. (the "Investment Manager" or  "InterCapital"),
a  Delaware corporation, whose address is Two  World Trade Center, New York, New
York 10048, is  the Fund's  Investment Manager. InterCapital  is a  wholly-owned
subsidiary  of Dean Witter, Discover &  Co. ("DWDC"), a Delaware corporation. In
an internal  reorganization  which took  place  in January,  1993,  InterCapital
assumed  the  investment  advisory,  administrative  and  management  activities
previously performed by the InterCapital  Division of Dean Witter Reynolds  Inc.
("DWR"), a broker-dealer affiliate of InterCapital. (As hereinafter used in this
Statement  of Additional  Information, the terms  "InterCapital" and "Investment
Manager"  refer  to   DWR's  InterCapital   Division  prior   to  the   internal
reorganization  and  to Dean  Witter  InterCapital Inc.  thereafter.)  The daily
management of  the  Fund and  research  relating  to the  Fund's  portfolio  are
conducted  by  or  under  the direction  of  officers  of the  Fund  and  of the
Investment Manager,  subject to  review by  the Fund's  Board of  Directors.  In
addition,  Directors  of  the  Fund provide  guidance  on  economic  factors and
interest rate  trends.  Information  as  to  these  Directors  and  officers  is
contained under the caption "Directors and Officers."
 
   
    InterCapital  is also  the investment manager  or investment  adviser of the
following  investment  companies:  Active  Assets  Money  Trust,  Active  Assets
Tax-Free   Trust,  Active  Assets  California   Tax-Free  Trust,  Active  Assets
Government Securities Trust, InterCapital  Income Securities Inc.,  InterCapital
Insured Municipal Bond Trust, InterCapital Insured Municipal Trust, InterCapital
Insured  Municipal  Income  Trust,  InterCapital  Insured  Municipal Securities,
InterCapital California  Insured Municipal  Income Trust,  InterCapital  Insured
California  Municipal  Securities,  InterCapital  Quality  Municipal  Investment
Trust,  InterCapital  Quality  Municipal  Income  Trust,  InterCapital   Quality
Municipal  Securities,  InterCapital  California  Quality  Municipal Securities,
InterCapital New York Quality Municipal Securities, High Income Advantage Trust,
High Income Advantage  Trust II, High  Income Advantage Trust  III, Dean  Witter
Government  Income Trust,  Dean Witter High  Yield Securities  Inc., Dean Witter
Tax-Free Daily  Income  Trust, Dean  Witter  Tax-Exempt Securities  Trust,  Dean
Witter Dividend Growth Securities Inc., Dean Witter Natural Resource Development
Securities  Inc., Dean Witter American Value Fund, Dean Witter Developing Growth
Securities Trust, Dean Witter  U.S. Government Money  Market Trust, Dean  Witter
Variable Investment Series, Dean Witter World Wide Investment Trust, Dean Witter
Select  Municipal  Reinvestment  Fund, Dean  Witter  U.S.  Government Securities
Trust, Dean  Witter World  Wide Income  Trust, Dean  Witter California  Tax-Free
Income  Fund, Dean Witter New York Tax-Free Income Fund, Dean Witter Convertible
Securities Trust, Dean Witter Federal Securities Trust, Dean Witter  Value-Added
Market Series, Dean Witter Utilities Fund, Dean Witter California Tax-Free Daily
Income  Trust,  Dean Witter  Strategist  Fund, Dean  Witter  Intermediate Income
Securites, Dean Witter  Capital Growth Securities,  Dean Witter Precious  Metals
and  Minerals Trust,  Dean Witter  New York  Municipal Money  Market Trust, Dean
Witter European  Growth Fund  Inc., Dean  Witter Global  Short-Term Income  Fund
Inc.,  Dean Witter Pacific  Growth Fund Inc.,  Dean Witter Multi-State Municipal
Series Trust, Dean Witter  Short-Term U.S. Treasury  Trust, Dean Witter  Premier
Income  Trust, Dean Witter Diversified Income Trust, Dean Witter Health Sciences
Trust, Dean  Witter  Retirement  Series,  Dean  Witter  Global  Dividend  Growth
Securities,  Dean Witter  Limited Term  Municipal Trust,  Dean Witter Short-Term
Bond Fund, Dean Witter Global
    
 
                                       3
<PAGE>
   
Utilities Fund,  Dean  Witter  High  Income  Securities,  Dean  Witter  National
Municipal  Trust, Dean Witter  International SmallCap Fund,  Dean Witter Mid-Cap
Growth Fund,  Dean  Witter  Select Dimensions  Investment  Series,  Dean  Witter
Balanced  Growth  Fund, Dean  Witter Balanced  Income  Fund, Dean  Witter Hawaii
Municipal Trust, Dean Witter Capital Appreciation Fund, Dean Witter Intermediate
Term U.S. Treasury Trust, Dean Witter Information Fund, Dean Witter Japan  Fund,
Dean  Witter  Income Builder  Fund, Dean  Witter  Special Value  Fund, 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 investment
companies for which TCW Funds Management, Inc. is the investment adviser: TCW/DW
Core Equity Trust, TCW/DW North  American Government Income Trust, TCW/DW  Latin
American  Growth Fund,  TCW/DW Income and  Growth Fund, TCW/DW  Small Cap Growth
Fund, TCW/DW Balanced  Fund, TCW/DW  Total Return Trust,  TCW/DW Mid-Cap  Equity
Trust,  TCW/DW  Global  Telecom  Trust, TCW/DW  Strategic  Income  Trust, TCW/DW
Emerging Markets Opportunities Trust, TCW/DW Term Trust 2000, TCW/DW Term  Trust
2002  and TCW/DW Term Trust 2003  (the "TCW/DW Funds"). InterCapital also serves
as: (i)  sub-adviser  to  Templeton  Global  Opportunities  Trust,  an  open-end
investment  company; (ii)  administrator of  The BlackRock  Strategic Term Trust
Inc., a closed-end investment company; and (iii) sub-administrator of MassMutual
Participation  Investors  and   Templeton  Global   Governments  Income   Trust,
closed-end investment companies.
    
 
    Pursuant  to an Investment  Management Agreement (the  "Agreement") with the
Investment Manager, the Fund has retained  the Investment Manager to manage  the
investment  of  the  Fund's assets,  including  the  placing of  orders  for the
purchase and sale of  portfolio securities. The  Investment Manager obtains  and
evaluates  such  information  and  advice relating  to  the  economy, securities
markets, and  specific  securities  as  it  considers  necessary  or  useful  to
continuously  manage the  assets of  the Fund  in a  manner consistent  with its
investment objectives and policies.
 
    Under the  terms  of the  Agreement,  in  addition to  managing  the  Fund's
investments,  the Investment Manager  maintains certain of  the Fund's books and
records and furnishes, at its expense, such office space, facilities, equipment,
clerical help, bookkeeping and certain legal services as the Fund may reasonably
require in the conduct of its  business, including the services of personnel  in
connection  with  the  pricing  of  the Fund's  shares  and  the  preparation of
prospectuses, proxy statements and reports required to be filed with federal and
state securities commissions (except insofar as the participation or  assistance
of  independent accountants and  attorneys is, in the  opinion of the Investment
Manager, necessary or desirable). In  addition, the Investment Manager pays  the
salaries  of all personnel, including officers of  the Fund who are employees of
the Investment Manager. The Investment Manager also bears the cost of  telephone
service,  heat, light, power and  other utilities provided to  the Fund, and the
cost of  printing  (in excess  of  costs borne  by  the Fund)  and  distributing
prospectuses and supplements thereto of the Fund used for sales purposes.
 
    Effective  December  31,  1993,  pursuant to  a  Services  Agreement between
InterCapital and DWSC, DWSC began to provide the administrative services to  the
Fund  which were  previously performed  directly by  InterCapital. On  April 17,
1995, DWSC was  reorganized in the  State of Delaware,  necessitating the  entry
into  a  new Services  Agreement  by InterCapital  and  DWSC on  that  date. The
foregoing internal reorganizations did not result in any change in the nature or
scope of the administrative services  being provided to the  Fund or any of  the
fees  being paid by the Fund for  the overall services being performed under the
terms of the Agreement.
 
    Expenses not expressly assumed by the Investment Manager under the Agreement
or by  the Distributor  of  the Fund's  shares,  Dean Witter  Distributors  Inc.
("Distributors" or the "Distributor"), (see
 
                                       4
<PAGE>
"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  stock 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 of the Fund and supplements thereto to the Fund's shareholders; all
expenses  of shareholders' and  directors' meetings and  of preparing, printing,
including  typesetting,  and  mailing  of   proxy  statements  and  reports   to
shareholders and prospective shareholders; fees and travel expenses of Directors
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,  distribution,  withdrawal  or redemption
options; fees and expenses of legal  counsel including counsel to the  Directors
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 in connection  with any matter
relating to the Fund; membership dues of industry associations; interest on Fund
borrowings; postage;  insurance premiums  on  property or  personnel  (including
officers  and Directors) 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 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 $1.35  billion;
0.325%  of the portion of  the daily net assets  exceeding $1.35 billion but not
exceeding $1.75 billion; 0.30% of the portion of the daily net assets  exceeding
$1.75  billion but  not exceeding  $2.15 billion; 0.275%  of the  portion of the
daily net assets exceeding $2.15 billion  but not exceeding $2.5 billion;  0.25%
of  the portion of the daily net assets exceeding $2.5 billion but not exceeding
$15 billion; 0.249% of the portion of daily net assets exceeding $15 billion but
not exceeding $17.5 billion; and 0.248% of  the portion of the daily net  assets
exceeding  $17.5 billion. Total compensation paid  to the Investment Manager for
the Fund's  fiscal  years ended  August  31, 1994,  1995  and 1996  amounted  to
$23,750,120, $26,483,251 and $30,669,867, respectively.
    
 
   
    Pursuant  to the Agreement, total operating expenses of the Fund are subject
to applicable limitations under rules and  regulations of states where the  Fund
is  authorized to sell its shares. Therefore, operating expenses are effectively
subject to the most restrictive of such  limitations as the same may be  amended
from time to time. Presently, the most restrictive limitation is as follows: If,
in  any  fiscal  year,  the  Fund's  total  operating  expenses,  including  the
investment management fee and  the compensation paid  to the Investment  Manager
pursuant  to the Plan  of Distribution described below,  and exclusive of taxes,
interest, brokerage fees and extraordinary expenses (to the extent permitted  by
applicable  state securities laws  and regulations), exceed 2  1/2% of the first
$30,000,000 of average daily net assets, 2%  of the next $70,000,000 and 1  1/2%
of  any excess over $100,000,000, the Investment Manager will reimburse the Fund
for the amount of such excess. Such amount, if any, will be calculated daily and
credited on a monthly basis. During the fiscal years ended August 31, 1994, 1995
and 1996, the Fund's expenses did not exceed such limitation.
    
 
    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.
 
                                       5
<PAGE>
    The Agreement was initially  approved by the Board  of Directors on  October
30,  1992, and by the shareholders of the Fund at a 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 Board of
Directors on January 18, 1983 and by  the shareholders of the Fund at a  Special
Meeting of Shareholders held on March 18, 1983, as such prior agreement had been
amended,  to  bring its  provisions in  connection with  the limitations  on the
Fund's operating  expenses  imposed by  state  securities laws  and  regulations
thereunder  up to date  with current state  securities laws, by  approval of the
shareholders of the Fund on December 18, 1984. 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 Directors of  the Fund, by  the holders of  a majority,  as
defined  in the Investment Company  Act of 1940, as  amended (the "Act"), of the
outstanding shares of the Fund, or by the Investment Manager. The Agreement will
automatically terminate in the event of its assignment (as defined in the Act).
 
   
    Under its terms, the Agreement had an initial term ending April 30, 1994 and
will 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  Directors of the  Fund; provided that  in either event  such continuance is
approved annually by the vote of a majority of the Directors of the Fund who are
not parties to the Agreement or "interested persons" (as defined in the Act)  of
any  such party (the "Independent Directors"), which vote must be cast in person
at a meeting called for the purpose  of voting on such approval. At its  meeting
held  on April  17, 1996, the  Fund's Board  of Directors, including  all of the
Independent Directors, approved  continuation of the  Agreement until April  30,
1997.
    
 
   
    The Fund has acknowledged that the name "Dean Witter" is a property right of
DWR.  The Fund has agreed that DWR or its parent company may use, or at any time
permit others to use, the name "Dean  Witter." The Fund has also agreed that  in
the   event  the  Agreement  is  terminated,   or  if  the  affiliation  between
InterCapital and its parent company is  terminated, the Fund will eliminate  the
name "Dean Witter" from its name if DWR or its parent company shall so request.
    
 
DIRECTORS AND OFFICERS
- --------------------------------------------------------------------------------
 
   
    The  Directors and Executive Officers of  the Fund, their principal business
occupations during the  last five  years and  their affiliations,  if any,  with
InterCapital and with the 82 Dean Witter Funds and the 14 TCW/DW Funds are shown
below.
    
 
   
<TABLE>
<CAPTION>
        NAME, AGE, POSITION WITH FUND
                 AND ADDRESS                             PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ---------------------------------------------  ---------------------------------------------------------------
<S>                                            <C>
Michael Bozic (55)                             Chairman  and  Chief  Executive  Officer  of  Levitz  Furniture
Director                                       Corporation (since November, 1995); Director or Trustee of  the
c/o Levitz Furniture Corporation               Dean  Witter  Funds;  formerly  President  and  Chief Executive
6111 Broken Sound Parkway, N.W.                Officer of  Hills  Department Stores  (May,  1991-July,  1995);
Boca Raton, Florida                            formerly variously Chairman, Chief Executive Officer, President
                                               and   Chief   Operating  Officer   (1987-1991)  of   the  Sears
                                               Merchandise Group  of  Sears,  Roebuck  and  Co.;  Director  of
                                               Eaglemark  Financial  Services Inc.,  the United  Negro College
                                               Fund and Weirton Steel Corporation.
</TABLE>
    
 
                                       6
<PAGE>
   
<TABLE>
<CAPTION>
        NAME, AGE, POSITION WITH FUND
                 AND ADDRESS                             PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ---------------------------------------------  ---------------------------------------------------------------
<S>                                            <C>
Charles A. Fiumefreddo* (63)                   Chairman and  Chief  Executive  Officer  and  Director  of  In-
Chairman of the Board,                         terCapital, DWSC and Distributors; Executive Vice President and
President and Chief Executive                  Director  of DWR; Chairman, Director  or Trustee, President and
Officer and Director                           Chief Executive  Officer of  the Dean  Witter Funds;  Chairman,
Two World Trade Center                         Chief  Executive  Officer  and  Trustee  of  the  TCW/DW Funds;
New York, New York                             Chairman and Director  of Dean Witter  Trust Company  ("DWTC");
                                               Director  and/or officer of various DWDC subsidiaries; formerly
                                               Executive Vice President and Director of DWDC (until  February,
                                               1993).
Edwin J. Garn (64)                             Director  or Trustee of the  Dean Witter Funds; formerly United
Director                                       States  Senator  (R-Utah)  (1974-1992)  and  Chairman,   Senate
c/o Huntsman Chemical Corporation              Banking  Committee  (1980-1986);  formerly Mayor  of  Salt Lake
500 Huntsman Way                               City,  Utah  (1971-1974);  formerly  Astronaut,  Space  Shuttle
Salt Lake City, Utah                           Discovery (April 12-19, 1985); Vice Chairman, Huntsman Chemical
                                               Corporation  (since January, 1993);  Director of Franklin Quest
                                               (time management  systems)  and  John  Alden  Financial  Corp.;
                                               Member   of  the   board  of   various  civic   and  charitable
                                               organizations.
John R. Haire (71)                             Chairman of the Audit Committee  and Chairman of the  Committee
Director                                       of  the  Independent  Directors  or  Trustees  and  Director or
Two World Trade Center                         Trustee of  the  Dean  Witter  Funds;  Chairman  of  the  Audit
New York, New York                             Committee  and  Chairman of  the  Committee of  the Independent
                                               Trustees and Trustee of  the TCW/DW Funds; formerly  President,
                                               Council for Aid to Education (1978-1989) and Chairman and Chief
                                               Executive  Officer of Anchor Corporation, an Investment Adviser
                                               (1964-1978);  Director  of   Washington  National   Corporation
                                               (insurance).
Dr. Manuel H. Johnson (47)                     Senior  Partner,  Johnson  Smick  International,  Inc.,  a con-
Director                                       sulting firm;  Koch Professor  of International  Economics  and
c/o Johnson Smick International, Inc.          Director  of  the Center  for Global  Market Studies  at George
1133 Connecticut Avenue, N.W.                  Mason University; Co-Chairman  and a  founder of  the Group  of
Washington, DC                                 Seven  Council  (G7C),  an  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
Director                                       partnership  (since  1988);  formerly  Vice  President, Bankers
c/o Triumph Capital, L.P.                      Trust Company and BT Capital Corporation (1984-1988);  Director
237 Park Avenue                                or  Trustee of  the Dean  Witter Funds;  Trustee of  the TCW/DW
New York, New York                             Funds; Director of various business organizations.
</TABLE>
    
 
                                       7
<PAGE>
   
<TABLE>
<CAPTION>
        NAME, AGE, POSITION WITH FUND
                 AND ADDRESS                             PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ---------------------------------------------  ---------------------------------------------------------------
<S>                                            <C>
Philip J. Purcell* (53)                        Chairman of the Board of Directors and Chief Executive  Officer
Director                                       of  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
Director                                       of the TCW/DW  Funds; Director of  Citizens Utilities  Company;
c/o Gordon Altman Butowsky                     formerly  Executive Vice President and Chief Investment Officer
 Weitzen Shalov & Wein                         of the Home  Insurance Company  (August, 1991-September,  1995)
Counsel to the Independent Directors           and  Chairman  and  Chief  Investment  Officer  of Axe-Houghton
114 West 47th Street                           Management and the Axe-Houghton Funds (April, 1983-June, 1991).
New York, New York
 
Sheldon Curtis (64)                            Senior  Vice  President,  Secretary  and  General  Counsel   of
Vice President, Secretary                      InterCapital   and  DWSC;  Senior   Vice  President,  Assistant
and General Counsel                            Secretary and Assistant General Counsel of Disributors;  Senior
Two World Trade Center                         Vice  President and  Secretary of DWTC;  Assistant Secretary of
New York, New York                             DWR and Vice  President, Secretary and  General Counsel of  the
                                               Dean Witter Funds and the TCW/ DW Funds.
 
Jonathan R. Page (50)                          Senior  Vice  President  of  InterCapital;  Vice  President  of
Vice President                                 various Dean Witter Funds.
Two World Trade Center
New York, New York
 
Thomas F. Caloia (50)                          First Vice President  and Assistant  Treasurer of  InterCapital
Treasurer                                      and  DWSC; Treasurer  of the Dean  Witter Funds  and the TCW/DW
Two World Trade Center                         Funds.
New York, New York
<FN>
- ------------------------
 *Denotes Directors who are "Interested persons", as defined in the Act.
</TABLE>
    
 
   
    In addition, Robert  M. Scanlan,  President and Chief  Operating Officer  of
InterCapital  and DWSC,  Executive Vice President  of Distributors  and DWTC and
Director of DWTC, Robert  S. Giambrone, Senior  Vice President of  InterCapital,
DWSC, Distributors and DWTC and Director of DWTC, Joseph J. McAlinden, Executive
Vice  President and  Chief Investment  Officer of  InterCapital and  Director of
DWTC, Kevin  Hurley,  Peter  M.  Avelar  and  James  F.  Willison,  Senior  Vice
Presidents   of  InterCapital,  and   Patricia  A.  Cuddy,   Vice  President  of
InterCapital, are Vice Presidents of the Fund, and Marilyn K. Cranney and  Barry
Fink,  First Vice Presidents and Assistant  General Counsels of InterCapital and
DWSC, LouAnne D. McInnis and Ruth  Rossi, Vice Presidents and Assistant  General
Counsels  of  InterCapital and  DWSC, and  Carsten Otto,  a Staff  Attorney with
InterCapital, are Assistant Secretaries of the Fund.
    
 
   
THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES
    
 
   
    The Board of Trustees consists of eight (8) trustees. These same individuals
also serve as directors or  trustees for all of the  Dean Witter Funds, and  are
referred  to in this  section as Trustees. As  of the date  of this Statement of
Additional Information, there are a total of 82 Dean Witter Funds, comprised  of
122  portfolios. As of September  30, 1996, the Dean  Witter Funds had total net
assets of approximately $78 billion and more than five million shareholders.
    
 
                                       8
<PAGE>
   
    Six Trustees  (75% of  the total  number) have  no affiliation  or  business
connection with InterCapital or any of its affiliated persons and do not own any
stock  or other securities issued by  InterCapital's parent company, DWDC. These
are the "disinterested" or "independent"  Trustees. The other two Trustees  (the
"management  Trustees")  are  affiliated  with  InterCapital.  Four  of  the six
independent Trustees are also Independent Trustees of the TCW/DW Funds.
    
 
   
    Law and regulation establish both general guidelines and specific duties for
the Independent Trustees.  The Dean  Witter Funds seek  as Independent  Trustees
individuals  of distinction and  experience in business  and finance, government
service or academia; these are people whose advice and counsel are in demand  by
others  and for  whom there is  often competition.  To accept a  position on the
Funds' Boards, such individuals may reject other attractive assignments  because
the  Funds make  substantial demands  on their time.  Indeed, by  serving on the
Funds' Boards, certain Trustees who would  otherwise be qualified and in  demand
to serve on bank boards would be prohibited by law from doing so.
    
 
   
    All  of the Independent Trustees serve as members of the Audit Committee and
the Committee of the Independent Trustees.  Three of them also serve as  members
of  the Derivatives Committee. During the calendar year ended December 31, 1995,
the three Committees held a combined  total of fifteen meetings. The  Committees
hold  some  meetings at  InterCapital's offices  and some  outside InterCapital.
Management Trustees or  officers do not  attend these meetings  unless they  are
invited for purposes of furnishing information or making a report.
    
 
   
    The  Committee of the  Independent Trustees is  charged with recommending to
the full Board  approval of management,  advisory and administration  contracts,
Rule  12b-1  plans  and distribution  and  underwriting  agreements; continually
reviewing Fund performance;  checking on  the pricing  of portfolio  securities,
brokerage  commissions, transfer agent costs  and performance, and trading among
Funds in the  same complex; and  approving fidelity bond  and related  insurance
coverage and allocations, as well as other matters that arise from time to time.
The Independent Trustees are required to select and nominate individuals to fill
any  Independent Trustee vacancy on the Board of  any Fund that has a Rule 12b-1
plan of distribution. Most of the Dean Witter Funds have such a plan.
    
 
   
    The Audit  Committee is  charged with  recommending to  the full  Board  the
engagement  or  discharge  of  the  Fund's  independent  accountants;  directing
investigations into matters  within the  scope of  the independent  accountants'
duties,  including the power  to retain outside  specialists; reviewing with the
independent accountants the audit plan  and results of the auditing  engagement;
approving  professional  services provided  by  the independent  accountants and
other accounting firms prior to the performance of such services; reviewing  the
independence  of the independent accountants; considering the range of audit and
non-audit fees;  reviewing  the  adequacy  of  the  Fund's  system  of  internal
controls;  and preparing  and submitting Committee  meeting minutes  to the full
Board.
    
 
   
    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.
    
 
                                       9
<PAGE>
   
    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.
    
 
   
    The  following  table  illustrates  the  compensation  paid  to  the  Fund's
Independent Trustees by the Fund for the fiscal year ended August 31, 1996.
    
 
   
                               FUND COMPENSATION
    
 
   
<TABLE>
<CAPTION>
                                                                   AGGREGATE
                                                                 COMPENSATION
NAME OF INDEPENDENT TRUSTEE                                      FROM THE FUND
- --------------------------------------------------------------  ---------------
<S>                                                             <C>
Michael Bozic.................................................      $1,750
Edwin J. Garn.................................................       1,800
John R. Haire.................................................       3,913(1)
Dr. Manuel H. Johnson.........................................       1,750
Michael E. Nugent.............................................       1,750
John L. Schroeder.............................................       1,750
</TABLE>
    
 
- ------------------------
   
(1)  Of  Mr. Haire's  compensation  from the  Fund, $3,150  was  paid to  him as
    Chairman of  the  Committee of  the  Independent Trustees  ($2,400)  and  as
    Chairman of the Audit Committee ($750).
    
 
                                       10
<PAGE>
   
    The  following  table  illustrates  the  compensation  paid  to  the  Fund's
Independent Trustees for the calendar year ended December 31, 1995 for  services
to  the 79 Dean Witter Funds and, in  the case of Messrs. Haire, Johnson, Nugent
and Schroeder, the 11 TCW/DW Funds that were in operation at December 31,  1995.
With  respect to Messrs. Haire, Johnson,  Nugent and Schroeder, the TCW/DW Funds
are included solely because of a limited exchange privilege between those  Funds
and  five Dean Witter Money Market Funds. Mr. Schroeder was elected as a Trustee
of the TCW/DW Funds on April 20, 1995.
    
 
   
              COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS
    
 
   
<TABLE>
<CAPTION>
                                                                                        TOTAL
                                                                   FOR SERVICE AS   COMPENSATION
                               FOR SERVICE                          CHAIRMAN OF         PAID
                              AS DIRECTOR OR                       COMMITTEES OF    FOR SERVICES
                               TRUSTEE AND       FOR SERVICE AS     INDEPENDENT          TO
                             COMMITTEE MEMBER     TRUSTEE AND        DIRECTORS/        79 DEAN
                                OF 79 DEAN      COMMITTEE MEMBER    TRUSTEES AND       WITTER
                                  WITTER          OF 11 TCW/DW         AUDIT        FUNDS AND 11
NAME OF INDEPENDENT TRUSTEE       FUNDS              FUNDS           COMMITTEES     TCW/DW FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------
<S>                          <C>                <C>                <C>              <C>
Michael Bozic..............      $126,050           --                 --             $126,050
Edwin J. Garn..............       136,450           --                 --              136,450
John R. Haire..............        98,450           $82,038           $217,350(2)      397,838
Dr. Manuel H. Johnson......       136,450            82,038            --              218,488
Michael E. Nugent..........       124,200            75,038            --              199,238
John L. Schroeder..........       136,450            46,964            --              183,414
</TABLE>
    
 
- ------------------------
   
(2) For the 79  Dean Witter Funds  in operation at December  31, 1995. As  noted
    above,  on July 1, 1996,  Mr. Haire became Chairman  of the Committee of the
    Independent Trustees and the Audit Committee of the TCW/DW Funds in addition
    to continuing to serve in such positions for the Dean Witter Funds.
    
 
   
    As of the date of this Statement  of Additional Information, 57 of the  Dean
Witter  Funds, 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.(3) "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.
    
 
- ------------------------
   
(3)  An Eligible Trustee may  elect alternate payments of  his or her retirement
    benefits based upon the  combined life expectancy  of such Eligible  Trustee
    and his or her spouse on the date of such Eligible Trustee's retirement. The
    amount  estimated to be payable under  this method, through the remainder of
    the later of  the lives of  such Eligible  Trustee and spouse,  will be  the
    actuarial  equivalent  of the  Regular  Benefit. In  addition,  the Eligible
    Trustee may elect that the  surviving spouse's periodic payment of  benefits
    will  be equal  to either 50%  or 100%  of the previous  periodic amount, an
    election that, respectively,  increases or decreases  the previous  periodic
    amount  so that the  resulting payments will be  the actuarial equivalent of
    the Regular Benefit.
    
 
                                       11
<PAGE>
   
    The following  table  illustrates the  retirement  benefits accrued  to  the
Fund's  Independent Trustees by  the Fund for  the fiscal year  ended August 31,
1996 and by the  57 Dean Witter  Funds (including the Fund)  as of December  31,
1995,  and the estimated retirement benefits for the Fund's Independent Trustees
from the Fund as  of August 31,  1996 and from  the 57 Dean  Witter Funds as  of
December 31, 1995.
    
 
   
          RETIREMENT BENEFITS FROM THE FUND AND ALL DEAN WITTER FUNDS
    
 
   
<TABLE>
<CAPTION>
                                             FOR ALL ADOPTING FUNDS            RETIREMENT BENEFITS        ESTIMATED ANNUAL
                                     --------------------------------------    ACCRUED AS EXPENSES            BENEFITS
                                          ESTIMATED                                                      UPON RETIREMENT(4)
                                       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%       $     377   $    26,359  $     850  $    51,550
Edwin J. Garn......................              10               50.0              548        41,901        850       51,550
John R. Haire......................              10               50.0              961       261,763      2,296      130,404
Dr. Manuel H. Johnson..............              10               50.0              229        16,748        850       51,550
Michael E. Nugent..................              10               50.0              391        30,370        850       51,550
John L. Schroeder..................               8               41.7              728        51,812        708       42,958
</TABLE>
    
 
- ------------------------
   
(4)  Based on  current levels  of compensation.  Amount of  annual benefits also
    varies depending on the Trustee's elections described in Footnote (3) above.
    
 
   
    As of the date  of this Statement of  Additional Information, the  aggregate
number of shares of beneficial interest of the Fund owned by the Fund's officers
and  Trustees  as a  group  was less  than  1 percent  of  the Fund's  shares of
beneficial interest outstanding.
    
 
INVESTMENT PRACTICES AND POLICIES
- --------------------------------------------------------------------------------
 
    REPURCHASE AGREEMENTS.  As discussed in  the Prospectus, the Fund may  enter
into repurchase agreements with financial institutions. The Fund follows certain
procedures  designed to  minimize the risks  inherent in  such agreements. These
procedures  include   effecting  repurchase   transactions  only   with   large,
well-capitalized  and  well-established financial  institutions  whose financial
condition is continually  monitored. In  addition, the value  of the  collateral
underlying  the  repurchase  agreement will  always  be  at least  equal  to the
repurchase price,  including  any  accrued interest  earned  on  the  repurchase
agreement.  Such collateral will  consist of Government  Securities or "Eligible
Securities" (as  described below  under  the caption  "How  Net Asset  Value  is
Determined")  rated in the highest grade  by a nationally recognized statistical
rating organization (a "NRSRO") whose ratings qualify the collateral security as
an Eligible Security.  In the  event of  a default  or bankruptcy  by a  selling
financial institution, the Fund will seek to liquidate such collateral. However,
the  exercising of the  Fund's right to liquidate  such collateral could involve
certain costs or delays and,  to the extent that proceeds  from any sale upon  a
default of the obligation to repurchase were less than the repurchase price, the
Fund  could suffer a loss. It is the current policy of the Fund not to invest in
repurchase agreements  that  do  not  mature  within  seven  days  if  any  such
investment, together with any other illiquid assets held by the Fund, amounts to
more  than  10%  of  its  total assets.  The  Fund's  investments  in repurchase
agreements may  at times  be substantial  when, in  the view  of the  Investment
Manager, liquidity or other considerations warrant.
 
    REVERSE REPURCHASE AGREEMENTS.  As discussed in the Prospectus, the Fund may
also  use  reverse repurchase  agreements as  part  of its  investment strategy.
Reverse repurchase agreements involve sales by  the Fund to repurchase the  same
assets  at  a later  date at  a fixed  price.  Generally, the  effect of  such a
transaction is that the Fund can recover all or most of the cash invested in the
portfolio  securities  involved  during  the  term  of  the  reverse  repurchase
agreement,  while it will  be able to  keep the interest  income associated with
those portfolio  securities.  Such transactions  are  only advantageous  if  the
interest cost to the Fund of the reverse repurchase transaction is less than the
cost  of obtaining the  cash otherwise. Opportunities  to achieve this advantage
may not always be available, and the Fund intends to
 
                                       12
<PAGE>
   
use the reverse repurchase technique only when it will be to its advantage to do
so. The Fund  will establish  a segregated account  with its  custodian bank  in
which  it  will  maintain liquid  portfolio  securities  equal in  value  to its
obligations in  respect of  reverse  repurchase agreements.  Reverse  repurchase
agreements  are considered  borrowings by the  Fund and for  purposes other than
meeting redemptions may not exceed 5% of the Fund's total assets.
    
 
    PRIVATE PLACEMENTS.  As discussed in the Prospectus, the Fund may invest  in
commercial  paper  issued  in  reliance  on  the  so-called  "private placement"
exemption from registration afforded  by Section 4(2) of  the Securities Act  of
1933  (the  "Securities  Act") and  which  may  be sold  to  other institutional
investors pursuant to Rule  144A under the Securities  Act. The adoption by  the
Securities  and Exchange  Commission of Rule  144A, which permits  the resale of
certain restricted  securities to  institutional investors,  had the  effect  of
broadening  and increasing the liquidity of the institutional trading market for
securities subject to restrictions on resale to the general public. Section 4(2)
commercial paper sold  pursuant to Rule  144A is  restricted in that  it can  be
resold  only to  qualified institutional investors.  However, since institutions
constitute virtually the entire market for such commercial paper, the market for
such Section 4(2) commercial paper is, in  reality, as liquid as that for  other
commercial paper. While the Fund generally holds to maturity commercial paper in
its  portfolio, the advent  of Rule 144A  has greatly simplified  the ability to
sell Section  4(2)  commercial paper  to  other institutional  investors.  Under
procedures  adopted by the Board of Directors of the Fund, the Fund may purchase
Section 4(2) commercial  paper without being  subject to the  10% limitation  on
illiquid  investments (see "Investment Restrictions" in the Prospectus) and will
be able  to  utilize  Rule  144A  to sell  that  paper  to  other  institutional
investors.  The  procedures require  that  the Investment  Manager  consider the
following factors in determining that any restricted security eligible for  sale
pursuant  to Rule  144A be  considered liquid: (1)  the frequency  of trades and
quotes for the security, (2) the number  of dealers willing to purchase or  sell
the   security  and  the  number  of  other  potential  purchasers,  (3)  dealer
undertakings to  make a  market  in the  security, and  (4)  the nature  of  the
security  and the nature  of the market  place trades (i.e.,  the time needed to
dispose of the security,  the method of soliciting  offers and the mechanics  of
transfer).  The Investment Manager will report to the Board on a quarterly basis
on all  restricted securities  held by  the Fund  with regard  to their  ongoing
liquidity.  In the event  any Section 4(2) commercial  paper or other restricted
security held by  the Fund is  determined to be  illiquid by the  Board and  the
Investment  Manager, that investment  would be included  as an illiquid security
subject to the 10% limitation on illiquid investments referred to above.
 
   
    LENDING OF PORTFOLIO SECURITIES.  Subject to Investment Restriction 2 below,
the Fund  may  lend  portfolio  securities to  brokers,  dealers  and  financial
institutions  provided that cash equal  to at least 100%  of the market value of
the securities  loaned  is  deposited by  the  borrower  with the  Fund  and  is
maintained  each business  day in  a segregated  account pursuant  to applicable
regulations. The creditworthiness of firms to which the Fund lends its portfolio
securities is monitored on an ongoing basis. While such securities are on  loan,
the  borrower will pay  the Fund any  income accruing thereon,  and the Fund may
invest the cash collateral in  portfolio securities, thereby earning  additional
income.  The Fund will not  lend its portfolio securities  if such loans are not
permitted by  the laws  or regulations  of any  state in  which its  shares  are
qualified  for sale and  will not lend more  than 10% of the  value of its total
assets. Loans  would  be  subject to  termination  by  the Fund  in  the  normal
settlement  time, currently five business days  after notice, or by the borrower
on one  day's notice.  Borrowed securities  must be  returned when  the loan  is
terminated.  Any gain  or loss  in the market  price of  the borrowed securities
which  occurs  during  the  term  of  the  loan  inures  to  the  Fund  and  its
shareholders.  The Fund  may pay reasonable  finders, borrowers, administrative,
and custodial  fees in  connection with  a loan.  During its  fiscal year  ended
August  31, 1996, the Fund did not lend  any of its portfolio securities, and it
has no intention of doing so in the foreseeable future.
    
 
    VARIABLE AND FLOATING RATE  OBLIGATIONS.  As stated  in the Prospectus,  the
Fund  may invest  in variable and  floating rate obligations.  The interest rate
payable on  a variable  rate obligation  is adjusted  at predesignated  periodic
intervals  and, on floating rate 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
 
                                       13
<PAGE>
whereby the Fund may demand prepayment of the principal amount of the obligation
prior to its stated maturity (a "demand feature") and the right of the issuer to
prepay  the  principal amount  prior  to maturity.  The  principal benefit  of a
variable rate obligation is that the interest rate adjustment minimizes  changes
in  the market value  of the obligation.  As a result,  the purchase of variable
rate and floating  rate obligations should  enhance the ability  of the Fund  to
maintain  a  stable net  asset  value per  share (see  "How  Net Asset  Value is
Determined") and to sell obligations prior to maturity at a price  approximating
the  full principal amount of the obligations. The principal benefit to the Fund
of purchasing  obligations with  a demand  feature is  that liquidity,  and  the
ability  of the  Fund to  obtain repayment  of the  full principal  amount of an
obligation prior to maturity, is enhanced. The payment of principal and interest
by issuers of  certain obligations purchased  by the Fund  may be guaranteed  by
letters of credit or other credit facilities offered by banks or other financial
institutions.  Such  guarantees will  be  considered in  determining  whether an
obligation meets the Fund's investment quality requirements.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    In addition to the investment restrictions enumerated in the Prospectus, the
Fund has adopted  certain investment  restrictions listed  below as  fundamental
policies  which  cannot be  changed without  the  approval of  the holders  of a
"majority" of  the  outstanding shares  of  the Fund,  as  defined in  the  Act.
Majority  is defined in the Act as the lesser of (a) sixty-seven percent or more
of the shares present at a meeting of shareholders, if the holders of more  than
fifty  percent of the outstanding shares of  the Fund are present or represented
by proxy, or (b) more than fifty percent of the outstanding shares of the Fund.
 
    These restrictions provide that the Fund may not:
 
         1. Purchase any common stocks or other equity securities;
 
         2. Make  loans to  others,  except through  the  purchase of  the  debt
    obligations   and  repurchase  agreements   referred  to  under  "Investment
    Practices and Policies"  above and "Investment  Objectives and Policies"  in
    the  Prospectus; and loans of  portfolio securities in excess  of 10% of the
    value of  the  Fund's  total  assets, made  in  accordance  with  guidelines
    established   by  the  Fund's  Board  of  Directors,  including  maintaining
    collateral from the borrower equal at all times to the current market  value
    of the securities loaned;
 
         3.  Purchase  or  sell  real estate;  however,  the  Fund  may purchase
    marketable securities issued  by companies  which invest in  real estate  or
    interests therein;
 
         4. Purchase securities on margin or sell short;
 
         5. Purchase or sell commodities or commodity futures contracts, or oil,
    gas or mineral exploration or development programs;
 
         6. Underwrite securities of other issuers;
 
         7.   Purchase  warrants,  or  write,  purchase  or  sell  puts,  calls,
    straddles, spreads, or combinations thereof;
 
         8. Participate on a joint or joint and several basis in any  securities
    trading account;
 
         9. Purchase the securities of any other investment company;
 
        10.  Purchase securities  of any  issuer for  the purpose  of exercising
    control or management; and
 
        11. Purchase or retain  the securities of any  issuer if any officer  or
    director  of the  Fund is  an officer  or director  of such  issuer and owns
    beneficially more than 1/2 of 1% of the securities of such issuer and all of
    the officers and directors of the  Fund and its Investment Manager  together
    own more than 5% of the securities of such issuer.
 
                                       14
<PAGE>
    If  a percentage restriction is  adhered to at the  time of an investment, a
later increase or decrease  in percentage resulting from  a change in values  of
portfolio  securities or amount of total or  net assets will not be considered a
violation of any of the foregoing restrictions.
 
PORTFOLIO TRANSACTIONS AND BROKERAGE
- --------------------------------------------------------------------------------
 
   
    Subject to the general supervision by the Board of Directors, the Investment
Manager is responsible for decisions to buy and sell securities for the Fund and
arranges for the execution of portfolio  security transactions on behalf of  the
Fund.  Purchases of portfolio securities are made from dealers, underwriters and
issuers; sales, if any, prior to maturity, are made to dealers and issuers.  The
Fund   does  not  normally  incur  any  brokerage  commission  expense  on  such
transactions. Money market  instruments are  generally traded 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. Securities purchased in underwritten offerings include a fixed amount of
compensation  to  the underwriter,  generally referred  to as  the underwriter's
concession or discount. When securities are  purchased or sold directly from  or
to  an issuer, no  commissions or discounts  are paid. During  the Fund's fiscal
years ended  August  31,  1994,  1995  and  1996,  the  Fund  did  not  pay  any
underwriter's  discounts on  principal transactions or  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, the  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 every case, 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 did 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
Banker's Acceptances) and Commercial Paper.  Such transactions will be  effected
with
 
                                       15
<PAGE>
   
DWR  only when the price  available from DWR is  better than that available from
other dealers. During its fiscal years ended August 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  than the remuneration
which would  be  expected  to  be  received  by  an  unaffiliated  broker  in  a
commensurate  arm's-length transaction. Furthermore, the  Directors of the Fund,
including a majority  of the Directors  who are not  "interested" Directors  (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. The  Fund did  not pay  any brokerage
commissions or underwriting discounts to  DWR or any other broker-dealer  during
the fiscal years ended August 31, 1994, 1995 and 1996.
    
 
    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.  Based  on  this
definition,  it is anticipated that the Fund's policy of investing in securities
with remaining  maturities of  thirteen months  or  less will  not result  in  a
quantifiable  portfolio turnover rate. However, because of the short-term nature
of the  Fund's  portfolio securities,  it  is  anticipated that  the  number  of
purchases  and  sales  or maturities  of  such securities  will  be substantial.
Nevertheless, as brokerage commissions are not normally charged on purchases and
sales of such securities, the large  number of these transactions does not  have
an  adverse effect upon the net  yield and net asset value  of the shares of the
Fund.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund  offers its shares for sale to  the
public on a continuous basis, without a sales charge. Pursuant to a Distribution
Agreement   between   the  Fund   and   Dean  Witter   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 which have entered into selected  dealer
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 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 Directors of  the Fund, including a  majority of the Directors
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 Directors"), approved, at its meeting held on October 30, 1992, the
current  Distribution  Agreement   appointing  the   Distributor  as   exclusive
distributor  of  the Fund's  shares and  providing for  the Distributor  to bear
distribution expenses not  borne by  the Fund. The  Distribution Agreement  took
effect  on June  30, 1993  upon the spin-off  by Sears,  Roebuck and  Co. of its
remaining shares  of DWDC.  By  its terms,  the  Distribution Agreement  had  an
initial term ending April 30, 1994 and will continue in effect from year to year
thereafter  if approved by the Directors. At its meeting held on April 17, 1996,
the Fund's  Board of  Directors,  including all  of the  Independent  Directors,
approved continuation of the Distribution Agreement until April 30, 1997.
    
 
                                       16
<PAGE>
    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 stock  certificate.
If  a stock  certificate is desired,  it must  be requested in  writing for each
transaction. Certificates are issued only for full shares and may be redeposited
in the account at any time. There is no charge to the investor for issuance of a
certificate. Whenever a  shareholder instituted transaction  takes place in  the
Shareholder   Investment  Account  directly  through  the  Transfer  Agent,  the
shareholder will be mailed a written confirmation of the 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 Liquid Asset  Fund
Inc.  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
confirmation will be mailed to the shareholder after each shareholder instituted
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,   predesignated  bank  account  or   systematic
withdrawal plan 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 shares of the Fund 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 Tax-Free Daily Income Trust, Dean Witter California 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  Short-Term U.S.  Treasury Trust,  Dean  Witter
Limited  Term Municipal  Trust, Dean  Witter Short-Term  Bond Fund,  Dean Witter
Balanced  Growth  Fund,  Dean  Witter  Balanced  Income  Fund  or  Dean   Witter
Intermediate  Term U.S. Treasury Trust (these  eleven funds, including the Fund,
are referred to herein as the "Exchange Funds"). There is no waiting period  for
exchanges of shares acquired by exchange or dividend reinvestment. Subsequently,
shares  of the Exchange Funds received in an exchange for shares of an FESC fund
(regardless of  the type  of  fund originally  purchased)  may be  redeemed  and
exchanged  for shares  of the  other Exchange  Funds, FESC  funds or  CDSC funds
(however, shares of  CDSC funds, including  shares acquired in  exchange of  (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 orginally 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.
    
 
                                       17
<PAGE>
    Any  new account  established through the  Exchange Privilege  will have the
same registration and cash dividend or dividend reinvestment plan as the present
account,  unless  the  Transfer  Agent  receives  written  notification  to  the
contrary.  For  telephone  exchanges,  the exact  registration  of  the existing
account and the account number must be provided.
 
    Any shares  held  in  certificate  form cannot  be  exchanged  but  must  be
forwarded  to the  Transfer Agent and  deposited into  the shareholder's account
before being eligible for exchange.  (Certificates mailed in for deposit  should
not be endorsed.)
 
    When  shares of any  CDSC fund are exchanged  for shares of  the Fund or any
other Exchange Fund, the exchange is  executed at no charge to the  shareholder,
without  the imposition  of the  CDSC at  the time  of the  exchange. During the
period of time the shareholder remains in the Exchange Fund (calculated from the
last day of  the month in  which the  Exchange Fund shares  were acquired),  the
holding  period or "year since purchase payment made" is frozen. When shares are
redeemed out of the Exchange Fund, they will be subject to a CDSC which would be
based upon  the period  of time  the shareholder  held shares  in a  CDSC  fund.
However, in the case of shares of a CDSC fund exchanged into an Exchange Fund on
or after April 23, 1990, upon redemption of shares which results in a CDSC being
imposed,  a credit (not  to exceed the amount  of the CDSC) will  be given in an
amount equal to the 12b-1 distribution fees incurred on or after that date which
are attributable to those shares.  Shareholders acquiring shares of an  Exchange
Fund  pursuant to this exchange privilege may  exchange those shares back into a
CDSC fund from the Exchange Fund, with  no CDSC being imposed on such  exchange.
The holding period previously frozen when shares were first exchanged for shares
of  the Exchange Fund resumes on the last day  of the month in which shares of a
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 an Exchange Fund, the date of purchase of the
shares  of the fund  exchanged into, for  purposes of the  CDSC upon redemption,
will be the  last day  of the  month in which  the shares  being exchanged  were
originally  purchased.  In allocating  the purchase  payments between  funds for
purposes of the CDSC, the amount which represents the current net asset value of
shares at the time of the exchange  which were (i) purchased more than three  or
six years (depending on the CDSC schedule applicable to the shares) prior to the
exchange,   (ii)  originally  acquired  through  reinvestment  of  dividends  or
distributions and (iii) acquired  in exchange for shares  of FESC funds, or  for
shares  of other  Dean Witter  Funds for  which shares  of FESC  funds have been
exchanged (all  such shares  called  "Free Shares"),  will be  exchanged  first.
Shares  of Dean  Witter American  Value Fund acquired  prior to  April 30, 1984,
shares of Dean Witter  Dividend Growth Securities Inc.  and Dean Witter  Natural
Resource  Development Securities Inc. acquired prior to July 2, 1984, and shares
of Dean  Witter Strategist  Fund acquired  prior to  November 8,  1989 are  also
considered  Free Shares and will be the first Free Shares to be exchanged. After
an exchange,  all  dividends earned  on  shares in  the  Exchange Fund  will  be
considered  Free Shares. If the exchanged amount  exceeds the value of such Free
Shares, an exchange is made, on a block-by-block basis, of non-Free Shares  held
for the longest period of time (except that if shares held for identical periods
of  time but subject to  different CDSC schedules are  held in the same Exchange
Privilege Account, the shares  of that block  that are subject  to a lower  CDSC
rate  will be exchanged prior to the shares  of that block that are subject to a
higher CDSC rate).  Shares equal to  any appreciation in  the value of  non-Free
Shares  exchanged will be treated as Free Shares, and the amount of the purchase
payments for the non-Free Shares of the fund exchanged into will be equal to the
lesser of (a) the purchase payments for, or (b) the current net asset value  of,
the  exchanged non-Free  Shares. If  an exchange  between funds  would result in
exchange of only  part of  a particular block  of non-Free  Shares, then  shares
equal  to any appreciation  in the value of  the block (up to  the amount of the
exchange) will be treated as Free  Shares and exchanged first, and the  purchase
payment  for  that block  will  be allocated  on a  pro  rata basis  between the
non-Free Shares of  that block  to be  retained and  the non-Free  Shares to  be
 
                                       18
<PAGE>
   
exchanged.  The prorated  amount of  such purchase  payment attributable  to the
retained non-Free Shares will  remain as the purchase  payment for such  shares,
and  the amount of  purchase payment for  the exchanged non-Free  Shares will be
equal to the lesser of (a) the  prorated amount of the purchase payment for,  or
(b)  the current net asset value of, those exchanged non-Free Shares. Based upon
the  procedures  described  in  the  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.
    
 
   
    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.
    
 
    With respect to  the redemption  or repurchase of  shares of  the Fund,  the
application  of proceeds to the purchase of new  shares in the Fund or any other
of the  funds and  the general  administration of  the Exchange  Privilege,  the
Transfer  Agent  acts as  agent for  the Distributor  and for  the shareholder's
Selected Broker-Dealer,  if any,  in  the performance  of such  functions.  With
respect  to exchanges, redemptions  or repurchases, the  Transfer Agent shall be
liable for its  own negligence  and not  for the  default or  negligence of  its
correspondents  or for losses in  transit. The Fund shall  not be liable for any
default or negligence  of the Transfer  Agent, the Distributor  or any  Selected
Broker-Dealer.
 
    The Distributor and any Selected Broker-Dealer have authorized and appointed
the  Transfer Agent to act as their  agent in connection with the application of
proceeds of any redemption of Fund shares  to the purchase of 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,  although that  fund may,  in  its
discretion,  accept initial purchases  of as low  as $5,000, and  $5,000 for the
Fund, Dean Witter Tax-Free Daily  Income Trust, Dean Witter California  Tax-Free
Daily  Income  Trust, 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  Funds for which  the
Exchange Privilege is available is $1,000.) Upon exchange into an Exchange Fund,
the  shares of that  fund will be  held in a  special Exchange Privilege Account
separately from accounts of  those shareholders who  have acquired their  shares
directly  from that  fund. As a  result, certain services  normally available to
shareholders of those funds,  including the check writing  feature, will not  be
available for funds held in that account.
    
 
    The  Fund and  each of the  other 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
 
                                       19
<PAGE>
   
terminated or revised at  any time by  any of the Dean  Witter Funds, upon  such
notice  as may  be required by  applicable regulatory  agencies (presently sixty
days' prior written notice for termination or material revision), provided  that
six   months'  prior  written  notice  of  termination  will  be  given  to  the
shareholders who hold shares of Exchange Funds, TCW/DW North American Government
Income Trust, TCW/DW 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.
    
 
    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 described above and to the Plan of Distribution after  the
reorganization).  The Plan was  initially approved by the  Board of Directors on
January 18, 1983 and by the Fund's  shareholders on March 18, 1983. The vote  of
the Board of Directors included a majority of the Directors who are not and were
not  at the time of their vote interested persons of the Fund (as defined in the
Act) and who  have and  had at  the time  of their  vote no  direct or  indirect
financial  interest  in  the  operation  of  the  Plan  (the  "Independent 12b-1
Directors"), cast in person  at a meeting  called for the  purpose of voting  on
such Plan.
 
    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 Directors  determine to reimburse,  as described  below. The following
activities and services may be provided  by the Distributor under the Plan:  (1)
compensation to and expenses of DWR's and other Selected Broker-Dealers' account
executives  and  other  employees; (2)  sales  incentives and  bonuses  to sales
representatives and to marketing personnel in connection with promoting sales of
the Fund's shares; (3) expenses incurred  in connection with promoting sales  of
the  Fund's shares;  (4) preparing  and distributing  sales literature;  and (5)
providing  advertising  and  promotional   activities,  including  direct   mail
solicitation   and  television,  radio,  newspaper,  magazine  and  other  media
advertisements.
 
    DWR account executives are paid  an annual residual commission, currently  a
gross  residual of  up to  0.10 of  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  accounts, including the expenses  of operating DWR's branch offices
in connection with the servicing of shareholder accounts, which expenses include
lease costs, the salaries and employee benefits of operations and sales  support
personnel,  utility costs, communication  costs and the  costs of stationery and
supplies and other expenses relating  to branch office servicing of  shareholder
accounts.
 
    The  Fund is authorized  to reimburse the  Distributor for specific expenses
incurred or to be incurred in  promoting the distribution of the Fund's  shares.
Reimbursement  is made through monthly payments in amounts determined in advance
of each  calendar  quarter  by  the  Directors,  including  a  majority  of  the
Independent  12b-1 Directors. 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   reimbursements   under   the  Plan
 
                                       20
<PAGE>
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  Investment  Manager provides  and  the  Directors  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 Directors determine which
particular expenses, and the  portions thereof, that may  be borne by the  Fund,
and  in  making such  a determination  consider the  scope of  the Distributor's
commitment to promoting the distribution of the Fund's shares.
 
    At their  meeting held  on October  30,  1992, the  Directors of  the  Fund,
including all of the Independent 12b-1 Directors, 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 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.
 
   
    The Fund accrued $10,716,020  to the Distributor pursuant  to the Plan,  for
the  fiscal year ended August 31, 1996. This is 0.10 of 1% of the Fund's average
daily net assets for its fiscal year ended August 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 DWR for expenses
substantially all  of  which  relate  to compensation  of  sales  personnel  and
associated overhead expenses -- $10,716,020.
    
 
    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
Directors,  and the  Directors 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  therefor; (2) the amounts  of such expenses; and  (3) a description of
the benefits derived by the Fund. In the Directors' quarterly review of the Plan
they considered  its continued  appropriateness and  the level  of  compensation
provided therein.
 
    The  Plan  will continue  from year  to year,  provided such  continuance is
approved annually  by a  vote of  the  Directors, including  a majority  of  the
Independent  12b-1 Directors. Any  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  Directors in  the  manner described  above.  The Plan  may  be
terminated at any time, without payment of any penalty, by vote of a majority of
the Independent 12b-1 Directors or by a vote of the holders of a majority of the
outstanding  voting securities of the  Fund (as defined in  the Act) on not more
than thirty days' written notice to any other party to the Plan. So long as  the
Plan  is  in  effect,  the  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 Directors  were provided, at their meeting held  on
April 17, 1996, with all the information the Board of Directors deemed necessary
to  make an informed determination  on whether the Plan  should be continued. In
making  their  determination   to  continue   the  Plan   and  Agreement   until
    
 
                                       21
<PAGE>
   
April 30, 1997, the Directors, including all of the Independent 12b-1 Directors,
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.
    
 
    No  interested person of the Fund nor any Director 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 4:00 p.m., New York time  (or, on days when the New York Stock
Exchange closes prior to 4:00 p.m., at such earlier time), on each day that  the
New  York Stock Exchange is open. 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  by  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  Board of Directors  is obligated, as  a particular responsibility within
the overall  duty  of  care  owed  to  the  Fund's  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)  the procedures include (i) calculation,  at such intervals as the Directors
determine are  appropriate and  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; (ii)
periodic review by the Directors of the  amount of deviation as well as  methods
used to calculate it; and (iii) maintenance of written records of the procedures
and  the Directors' considerations  made pursuant to them  and any actions taken
upon such consideration;  (c) the Board  of Directors 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 Board of Directors should take
such action as it  deems appropriate (such as  shortening the average  portfolio
maturity,  realizing gains or  losses or withholding  dividends) to eliminate or
reduce to the extent  reasonably practicable material  dilution or other  unfair
results to investors or existing shareholders which might arise from differences
between the two methods of valuation.
 
    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
 
                                       22
<PAGE>
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 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 is defined  in the Rule to  mean a security which: (a)
has a remaining  maturity of  397 days  or less;  (b) (i)  is rated  in the  two
highest  short-term  rating categories  by  any two  NRSROs  that have  issued a
short-term rating with respect to the  security or class of debt obligations  of
the  issuer,  or (ii)  if only  one NRSRO  has issued  a short-term  rating with
respect to the security, then by that NRSRO; (c) was a long-term security at the
time of issuance whose issuer has  outstanding a short-term obligation which  is
comparable  in priority and security and has a rating as specified in clause (b)
above; or (d) if no rating is assigned  by any NRSRO as provided in clauses  (b)
and  (c)  above,  the unrated  security  is determined  by  the Board  to  be of
comparable quality to any such rated security.
 
    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% 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: (i) no  more than 5%  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, in the securities of any one issuer.
 
    The presence of a line of credit or other credit facility offered by a  bank
or  other financial institution  which guarantees the  payment obligation of the
issuer, in the event of a default in the payment of principal or interest of  an
obligation, may be taken into account in determining whether an investment is an
Eligible Security, provided that the guarantee itself is an Eligible Security.
 
    The  Rule  further requires  that  the Fund  limit  its investments  to U.S.
dollar-denominated instruments  which the  Directors determine  present  minimal
credit  risks and which are Eligible Securities. The Rule also requires the Fund
to maintain a dollar-weighted average portfolio maturity (not more than 90 days)
appropriate to its objective  of maintaining a stable  net asset value of  $1.00
per share and precludes the purchase of any instrument with a remaining maturity
of  more than 397 days. Should the disposition of a portfolio security result in
a dollar-weighted average portfolio maturity of more than 90 days, the Fund will
invest its available cash in such a manner as to reduce such maturity to 90 days
or less as soon as is reasonably practicable.
 
    If the  Board of  Directors determines  that it  is no  longer in  the  best
interests  of the Fund and its shareholders  to maintain a stable price of $1.00
per share  or  if the  Board  believes that  maintaining  such price  no  longer
reflects  a market-based net asset  value per share, the  Board has the right to
change from an amortized  cost basis of valuation  to valuation based on  market
quotations. The Fund will notify shareholders of any such change.
 
                                       23
<PAGE>
REDEMPTION OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As  discussed in the Prospectus, shares of the Fund may be redeemed at their
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 other 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. 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 shareholders.
 
    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 shareholder have a value of
less  than  $1,000 or  such  lesser amounts  as  may be  fixed  by the  Board of
Directors. 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 $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 shareholder may  also redeem all or part of
the  shares   held   in   the   withdrawal   plan   account   (see   "Redemption
 
                                       24
<PAGE>
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
- --------------------------------------------------------------------------------
 
    DIVIDENDS  AND  DISTRIBUTIONS.   As discussed  in  the Prospectus,  the Fund
intends to distribute all of its daily net investment income and net  short-term
capital gains, if any, to shareholders of record as of the close of business the
preceding  business  day. Net  income, for  dividend purposes,  includes accrued
interest and amortization of market discount, plus or minus any gains or  losses
realized  on  sales of  portfolio securities,  less  the amortization  of market
premium and the estimated  expenses of the Fund.  Net income will be  calculated
immediately prior to the determination of net asset value per share of the Fund.
 
    The  Board  of Directors  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  Board,
might have a significant adverse effect on shareholders.
 
    TAXES.    The  Fund has  qualified  and  intends to  remain  qualified  as a
regulated investment company under Subchapter M of the Internal Revenue Code. If
so qualified, the Fund will not be  subject to federal income tax provided  that
it  distributes all  of its  taxable net  investment income  and all  of its net
realized gains.
 
    Gains or losses on  the sales of  securities by the  Fund will be  long-term
capital  gains or losses if  the securities have been held  by the Fund for more
than one year. Gains or  losses on the sale of  securities held for one year  or
less will be short-term capital gains or losses.
 
    Shareholders  will be subject  to federal income tax  on dividends paid from
interest income derived from taxable securities and on distributions of realized
net short-term  and long-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. Since the Fund's
income is expected to be derived  entirely from interest rather than  dividends,
none  of such distributions will be  eligible for the federal dividends received
deduction available to corporations. Realized net long-term gains distributions,
which are taxable as long-term capital gains, are not eligible for the dividends
received deduction.
 
    The Fund may  be subject to  tax or taxes  in certain states  where it  does
business.  Furthermore,  in those  states which  have income  tax laws,  the tax
treatment of the Fund and of  shareholders with respect to distributions by  the
Fund may differ from federal tax treatment.
 
    Shareholders  are urged to consult their own 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 ended August 31, 1996 was 5.04%.
The effective annual yield on this date was 5.17%, assuming daily compounding.
    
 
    The Fund's annualized current yield, as may  be quoted from time to time  in
advertisements and other communications to shareholders and potential investors,
is  computed  by determining,  for a  stated seven-day  period, the  net change,
exclusive of  capital  changes and  including  the value  of  additional  shares
purchased  with dividends  and any  dividends declared  therefrom (which reflect
deductions of all expenses of the Fund such as management fees), in the value of
a hypothetical  pre-existing  account having  a  balance  of one  share  at  the
beginning of the period, and dividing the difference by the value of the account
at  the beginning of the base period to  obtain the base period return, and then
multiplying the base period return by (365/7).
 
                                       25
<PAGE>
   
    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.
 
    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.
 
   
    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  $47,666,
$238,330 and $476,660, respectively, at August 31, 1996.
    
 
DESCRIPTION OF COMMON STOCK
- --------------------------------------------------------------------------------
 
    The Fund has an authorized capital of 25 billion shares of common stock with
a  par value of $.01 per share. All shares  are of the same class and are freely
transferable. Each outstanding  share is  entitled to  one vote  on all  matters
submitted  to a vote of shareholders  and to a pro rata  share of the Fund's net
assets in  liquidation  and of  dividends  declared.  The Fund  may  also  issue
fractional shares.
 
    The  shares of the  Fund do not  have cumulative voting  rights, which means
that the holders of more than fifty percent of the shares voting in any election
of directors can, if  they choose to do  so, elect all of  the directors of  the
Fund, in which event the holders of the remaining shares will be unable to elect
any  person as a director.  Shares issued will be  fully paid and non-assessable
and will have no preemptive, conversion or sinking rights.
 
CUSTODIAN AND TRANSFER AGENT
- --------------------------------------------------------------------------------
 
    The Bank of New York, 90 Washington Street, New York, New York 10286 is  the
Custodian  of the Fund's  assets. Any of  the Fund's cash  balances in excess of
$100,000 are unprotected  by federal  deposit insurance. Such  balances may,  at
times, be substantial.
 
    Dean  Witter Trust Company,  Harborside Financial Center,  Plaza Two, Jersey
City, New Jersey  07311 is  the Transfer Agent  of the  Fund's shares,  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  of Dean  Witter Distributors  Inc., the  Fund's
Distributor.  As Transfer Agent and Dividend Disbursing Agent, Dean Witter Trust
Company's responsibilities include  maintaining shareholder accounts,  including
providing  subaccounting  and  recordkeeping  services  for  certain  retirement
accounts;  disbursing  cash  dividends  and  reinvesting  dividends;  processing
account  registration  changes; handling  purchase and  redemption transactions;
mailing prospectuses  and reports;  mailing and  tabulating proxies;  processing
share  certificate transactions; and maintaining  shareholder records and lists.
For these services Dean Witter Trust Company receives a per shareholder  account
fee.
 
                                       26
<PAGE>
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 together with  the report of  its independent accountants,
will be sent to shareholders each year.
 
    The Fund's fiscal year  ends on August 31.  The financial statements of  the
Fund  must be  audited at  least once  a year  by independent  accountants whose
selection is made annually by the Fund's Board of Directors.
 
LEGAL COUNSEL
- --------------------------------------------------------------------------------
 
    Sheldon Curtis,  Esq., who  is an  officer and  the General  Counsel of  the
Investment Manager, is an officer and the General Counsel of the Fund.
 
EXPERTS
- --------------------------------------------------------------------------------
 
   
    The  annual financial statements of  the Fund for the  year ended August 31,
1996, which are 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
August  31, 1996, and the report of the independent accountants thereon, are set
forth in the Fund's Prospectus, and are incorporated herein by reference.
    
 
                                       27
<PAGE>
APPENDIX
- --------------------------------------------------------------------------------
 
    Description  of  the highest  commercial paper,  bond  and other  short- and
long-term rating categories assigned by  Standard & Poor's Corporation  ("S&P"),
Moody's  Investors  Service,  Inc. ("Moody's"),  Fitch  Investors  Service, Inc.
("Fitch"), Duff and Phelps, Inc. ("Duff"),  IBCA Limited and IBCA Inc.  ("IBCA")
and Thomson BankWatch, Inc. ("Thomson"):
 
COMMERCIAL PAPER AND SHORT-TERM RATINGS
 
    The  designation A-1  by S&P indicates  that the degree  of safety regarding
timely payment is either overwhelming or very strong. Those issues determined to
possess overwhelming safety  characteristics are  denoted with a  plus sign  (+)
designation.  Capacity for timely  payment on issues with  an A-2 designation is
strong. However, the  relative degree of  safety is  not as high  as for  issues
designated A-1.
 
    The  rating Prime-1 (P-1) is the highest commercial paper rating assigned by
Moody's. Issuers of  P-1 paper must  have a superior  capacity for repayment  of
short-term  promissory obligations and  ordinarily will be  evidenced by leading
market positions in well established industries,  high rates of return of  funds
employed,  conservative capitalization structures with moderate reliance on debt
and ample  asset  protection,  broad  margins  in  earnings  coverage  of  fixed
financial charges and high internal cash generation, and well established access
to  a range  of financial  markets and  assured sources  of alternate liquidity.
Issues rated Prime-2 (P-2)  have a strong capacity  for repayment of  short-term
promissory  obligations.  This  ordinarily  will be  evidenced  by  many  of the
characteristics cited above but to a lesser degree. Earnings trends and coverage
ratios,  while  sound,  will  be  more  subject  to  variation.   Capitalization
characteristics,  while  still appropriate,  may  be more  affected  by external
conditions. Ample alternate liquidity is maintained.
 
    The rating Fitch-1 (Highest  Grade) is the  highest commercial paper  rating
assigned  by  Fitch. Paper  rated Fitch-1  is regarded  as having  the strongest
degree of assurance for timely payment. The rating Fitch-2 (Very Good Grade)  is
the  second highest commercial paper rating  assigned by Fitch which reflects an
assurance of timely  payment only  slightly less  in degree  than the  strongest
issues.
 
    The  rating Duff-1 is the highest  commercial paper rating assigned by Duff.
Paper rated Duff-1 is regarded as  having very high certainty of timely  payment
with  excellent  liquidity  factors  which  are  supported  by  good fundamental
protection factors. Risk factors are minor.  Duff applies the modifiers (+)  and
(-)  to  the rating  Duff-1 in  recognition  of significant  quality differences
within the highest tier. Paper rated Duff-2 is regarded as having good certainty
of timely payment, good  access to capital markets  and sound liquidity  factors
and company fundamentals. Risk factors are small.
 
    The  designation A1 by IBCA indicates that  the obligation is supported by a
very strong  capacity for  timely  repayment. Those  obligations rated  A1+  are
supported  by the highest  capacity for timely repayment.  The designation A2 by
IBCA indicates that the obligation is supported by a strong capacity for  timely
repayment,  although  such capacity  may be  susceptible  to adverse  changes in
business, economic, or financial conditions.
 
    The rating TBW-1 is  the highest short-term rating  assigned by Thomson  and
indicates  a very high degree of likelihood  that principal and interest will be
paid on  a timely  basis. The  rating TBW-2  by Thomson  is its  second  highest
rating;  while the degree of safety  regarding timely repayment of principal and
interest is strong, the relative degree of  safety is not as high as for  issues
rated TBW-1.
 
BOND AND LONG-TERM RATINGS
 
    Bonds  rated AAA are considered  by S&P to be  the highest grade obligations
and possess an extremely  strong capacity to pay  interest and repay  principal.
Bonds  rated AA by S&P are  judged by S&P to have  a very strong capacity to pay
interest and repay principal, and differ only in small degrees from issues rated
AAA.
 
                                       28
<PAGE>
    Bonds which are rated Aaa by Moody's  are judged to be of the best  quality.
Bonds  rated Aa by  Moody's are judged by  Moody's to be of  high quality by all
standards. Together with the Aaa group they comprise what are generally known as
high-grade bonds. Aa  bonds are rated  lower than Aaa  bonds because margins  of
protection  may not be as large or fluctuations 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 rated bonds. Moody's applies
numerical modifiers  1, 2  and  3 in  the Aa  rating  category. The  modifier  1
indicates  a ranking for the security in the higher end of this rating category,
the modifier 2  indicates a mid-range  ranking, and the  modifier 3 indicates  a
ranking in the lower end of the rating category.
 
    Bonds  rated AAA  by Fitch are  judged by  Fitch to be  strictly high grade,
broadly  marketable,  suitable   for  investment  by   trustees  and   fiduciary
institutions  and liable  to but  slight market  fluctuation other  than through
changes in the  money rate. The  prime feature of  an AAA bond  is a showing  of
earnings  several times or many times interest requirements, with such stability
of applicable  earnings  that  safety is  beyond  reasonable  question  whatever
changes  occur in conditions. Bonds rated AA by  Fitch are judged by Fitch to be
of safety virtually beyond  question and are readily  salable, whose merits  are
not unlike those of the AAA class, but whose margin of safety is less strikingly
broad.  The issue may be the obligation of a small company, strongly secured but
influenced as to rating by the lesser financial power of the enterprise and more
local type of market.
 
    Bonds rated AAA by Duff are considered  to be of the highest credit  quality
with negligible risk factors that are only slightly more than for risk-free U.S.
Treasury  debt. Bonds rated AA  are judged by Duff to  be of high credit quality
with strong protection factors; risk is  modest but may vary slightly from  time
to time because of economic conditions. Duff applies modifiers of (+) and (-) to
the AA category.
 
    Obligations  rated AAA  by IBCA  have the  lowest expectation  of investment
risk. Capacity for timely  repayment of principal  and interest is  substantial,
such  that adverse  changes in  business, economic  or financial  conditions are
unlikely to increase investment risk significantly. Obligations rated AA have  a
very  low  expectation  of investment  risk.  Capacity for  timely  repayment of
principal and interest is substantial. Adverse changes in business, economic  or
financial conditions may increase investment risk albeit not very significantly.
 
    IBCA  also assigns a rating to certain international and U.S. banks. An IBCA
bank rating represents IBCA's current assessment of the strength of the bank and
whether such bank would  receive support should  it experience difficulties.  In
its  assessment of  a bank, IBCA  uses a  dual rating system  comprised of Legal
Ratings and  Individual  Ratings. In  addition,  IBCA assigns  banks  Long-  and
Short-Term  Ratings  as used  in the  corporate  ratings discussed  above. Legal
Ratings, which range  in gradation  from 1 through  5, address  the question  of
whether  the bank would receive  support by central banks  or shareholders if it
experienced difficulties, and such ratings are considered by IBCA to be a  prime
factor  in its  assessment of  credit risk.  Individual Ratings,  which range in
gradations from A through  E, represent IBCA's assessment  of a bank's  economic
merits  and address  the question  of how the  bank would  be viewed  if it were
entirely independent and could not rely on support from state authorities or its
owners.
 
    Companies rated  A are  considered by  Thomson to  possess an  exceptionally
strong  balance  sheet  and  earnings  record,  translating  into  an  excellent
reputation and unquestioned access to  their natural money markets; if  weakness
or  vulnerability exists in any  aspect of a company's  business, it is entirely
mitigated by the strengths of the organization. Companies rated A/B- by  Thomson
are judged by Thomson to be financially very solid with a favorable track record
and  no readily apparent  weakness; their overall risk  profiles, while low, are
not quite as favorable as for companies in the highest rating category.
 
                                       29
<PAGE>


                       DEAN WITTER LIQUID ASSET FUND INC.

                            PART C  OTHER INFORMATION

Item 24.  Financial Statements and Exhibits

   (a)  FINANCIAL STATEMENTS
      (1)  Financial statements and schedules, included
           in Prospectus (Part A):                                    Page in
                                                                     Prospectus
                                                                     ----------
                  
          Financial highlights for the years August 31,
          1987, 1988, 1989, 1990, 1991, 1992, 1993,
          1994, 1995 and 1996.........................................   3

          Portfolio of Investments at August 31, 1996.................  17

          Statement of assets and liabilities at
          August 31, 1996.............................................  21

          Statement of operations for the year ended
          August 31, 1996.............................................  22

          Statement of changes in net assets for the
          years ended August 31, 1995 and August 31, 1996.............  23

          Notes to Financial Statements...............................  24


     (2)  Financial statements included in the Statement of
          Additional Information (Part B):

          None

     (3)  Financial statements included in Part C:

          None

   (b)    EXHIBITS:


8.     --       Amendment to the Custodian Agreement between the
                Registrant and The Bank of New York

11.    --       Consent of Independent Accountants

16.    --       Schedules for Computation of Performance Quotation

27.    --       Financial Data Schedule

       -------------------------------------
       All other exhibits previously filed and incorporated
       by reference.


<PAGE>



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

                      None

Item 26.         NUMBER OF HOLDERS OF SECURITIES.

           (1)                                   (2)
                                     Number of Record Holders
     Title of Class                    at October 1, 1996
     --------------                  ------------------------

Shares of Common Stock                       1,634,887

Item 27.         INDEMNIFICATION

                 Reference is made to Section 3.15 of the Registrant's By-Laws
and Section 2-418 of the Maryland General Corporation Law.

                 Insofar as indemnification for liabilities arising under the
Securities Act of 1933 (the "Act") may be permitted to directors, officers and
controlling persons of the Registrant pursuant to the foregoing provisions or
otherwise, the Registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy
as expressed in the Act and is, therefore, unenforceable.  In the event that a
claim for indemnification against such liabilities (other than the payment by
the Registrant of expenses incurred or paid by a director, officer, or
controlling person of the Registrant in connection with the successful defense
of any action, suit or proceeding) is asserted against the Registrant by such
director, officer or controlling person in connection with the shares being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act, and will be governed by the final adjudication
of such issue.

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

                 Registrant, in conjunction with the Investment Manager,
Registrant's Directors, and other registered investment management companies
managed by the Investment Manager, maintains insurance on behalf of any person
who is or was a Director, officer, employee, or agent of Registrant, or who is
or was serving at the request of Registrant as a trustee, director, officer,
employee or agent of another trust or corporation, against any liability
asserted against him and incurred by him or



<PAGE>


arising out of his position.  However, in no event will Registrant maintain
insurance to indemnify any such person for any act for which Registrant itself
is not permitted to indemnify him.


Item 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER.
                 See "The Fund and Its Management" in the Prospectus regarding
the business of the investment adviser.  The following information is given
regarding officers of Dean Witter InterCapital Inc.  InterCapital is a wholly-
owned subsidiary of Dean Witter, Discover & Co.  The principal address of the
Dean Witter Funds is Two World Trade Center, New York, New York 10048.

                 The term "Dean Witter Funds" used below refers to the following
registered investment companies:

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

OPEN-END INVESTMENT COMPANIES:
 (1) Dean Witter Short-Term Bond Fund
 (2) Dean Witter Tax-Exempt Securities Trust
 (3) Dean Witter Tax-Free Daily Income Trust
 (4) Dean Witter Dividend Growth Securities Inc.
 (5) Dean Witter Convertible Securities Trust
 (6) Dean Witter Liquid Asset Fund Inc.
 (7) Dean Witter Developing Growth Securities Trust



                                        3
<PAGE>


 (8) Dean Witter Retirement Series
 (9) Dean Witter Federal Securities Trust
(10) Dean Witter World Wide Investment Trust
(11) Dean Witter U.S. Government Securities Trust
(12) Dean Witter Select Municipal Reinvestment Fund
(13) Dean Witter High Yield Securities Inc.
(14) Dean Witter Intermediate Income Securities
(15) Dean Witter New York Tax-Free Income Fund
(16) Dean Witter California Tax-Free Income Fund
(17) Dean Witter Health Sciences Trust
(18) Dean Witter California Tax-Free Daily Income Trust
(19) Dean Witter Global Asset Allocation Fund
(20) Dean Witter American Value Fund
(21) Dean Witter Strategist Fund
(22) Dean Witter Utilities Fund
(23) Dean Witter World Wide Income Trust
(24) Dean Witter New York Municipal Money Market Trust
(25) Dean Witter Capital Growth Securities
(26) Dean Witter Precious Metals and Minerals Trust
(27) Dean Witter European Growth Fund Inc.
(28) Dean Witter Global Short-Term Income Fund Inc.
(29) Dean Witter Pacific Growth Fund Inc.
(30) Dean Witter Multi-State Municipal Series Trust
(31) Dean Witter Premier Income Trust
(32) Dean Witter Short-Term U.S. Treasury Trust
(33) Dean Witter Diversified Income Trust
(34) Dean Witter U.S. Government Money Market Trust
(35) Dean Witter Global Dividend Growth Securities
(36) Active Assets California Tax-Free Trust
(37) Dean Witter Natural Resource Development Securities Inc.
(38) Active Assets Government Securities Trust
(39) Active Assets Money Trust
(40) Active Assets Tax-Free Trust
(41) Dean Witter Limited Term Municipal Trust
(42) Dean Witter Variable Investment Series
(43) Dean Witter Value-Added Market Series
(44) Dean Witter Global Utilities Fund
(45) Dean Witter High Income Securities
(46) Dean Witter National Municipal Trust
(47) Dean Witter International SmallCap Fund
(48) Dean Witter Mid-Cap Growth Fund
(49) Dean Witter Select Dimensions Investment Series
(50) Dean Witter Balanced Growth Fund
(51) Dean Witter Balanced Income Fund
(52) Dean Witter Hawaii Municipal Trust
(53) Dean Witter Capital Appreciation Fund
(54) Dean Witter Intermediate Term U.S. Treasury Trust
(55) Dean Witter Information Fund
(56) Dean Witter Japan Fund
(57) Dean Witter Income Builder Fund
(58) Dean Witter Special Value Fund

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


                                        4
<PAGE>


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

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


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION

Charles A. Fiumefreddo        Executive Vice President and Director of Dean
Chairman, Chief               Witter Reynolds Inc. ("DWR"); Chairman, Chief
Executive Officer and         Executive Officer and Director of Dean Witter
Director                      Distributors Inc. ("Distributors") and Dean
                              Witter Services Company Inc. ("DWSC"); Chairman
                              and Director of Dean Witter Trust Company
                              ("DWTC"); Chairman, Director or Trustee, President
                              and Chief Executive Officer of the Dean Witter
                              Funds and Chairman, Chief Executive Officer and
                              Trustee of the TCW/DW Funds; Formerly Executive
                              Vice President and Director of Dean Witter,
                              Discover & Co. ("DWDC"); Director and/or officer
                              of various DWDC subsidiaries.

Philip J. Purcell             Chairman, Chief Executive Officer and Director of
Director                      of DWDC and DWR; Director of DWSC and
                              Distributors; Director or Trustee of the Dean
                              Witter Funds; Director and/or officer of various
                              DWDC subsidiaries.

Richard M. DeMartini          Executive Vice President of DWDC; President and
Director                      Chief Operating Officer of Dean Witter Capital;
                              Director of DWR, DWSC, Distributors and DWTC;
                              Trustee of the TCW/DW Funds; Member (since
                              January, 1993) and Chairman (since January,
                              1995) of the Board of Directors of NASDAQ.


                                        5
<PAGE>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION

James F. Higgins              Executive Vice President of DWDC; President and
Director                      Chief Operating Officer of Dean Witter Financial;
                              Director of DWR, DWSC, Distributors and DWTC.

Thomas C. Schneider           Executive Vice President and Chief Financial
Executive Vice                Officer of DWDC, DWR, DWSC and Distributors;
President, Chief              Director of DWR, DWSC and Distributors.
Financial Officer and
Director

Christine A. Edwards          Executive Vice President, Secretary and General
Director                      Counsel of DWDC and DWR; Executive Vice President,
                              Secretary and Chief Legal Officer of Distributors;
                              Director of DWR, DWSC and Distributors.

Robert M. Scanlan             President and Chief Operating Officer of DWSC,
President and Chief           Executive Vice President of Distributors;
Operating Officer             Executive Vice President and Director of DWTC;
                              Vice President of the Dean Witter Funds and the
                              TCW/DW Funds.

John Van Heuvelen             President, Chief Operating Officer and Director
Executive Vice                of DWTC.
President

Joseph J. McAlinden           Vice President of the Dean Witter Funds and
Executive Vice President      Director of DWTC.
and Chief Investment
Officer

Sheldon Curtis                Assistant Secretary of DWR; Senior Vice President,
Senior Vice President,        Secretary and General Counsel of DWSC; Senior Vice
General Counsel and           President, Assistant General Counsel and Assistant
Secretary                     Secretary of Distributors; Senior Vice President
                              and Secretary of DWTC; Vice President, Secretary
                              and General Counsel of the Dean Witter Funds and
                              the TCW/DW Funds.

Peter M. Avelar
Senior Vice President         Vice President of various Dean Witter Funds.

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

Richard Felegy
Senior Vice President



                                        6
<PAGE>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION


Edward Gaylor
Senior Vice President         Vice President of various Dean Witter Funds.

Robert S. Giambrone
Senior Vice President         Senior Vice President of DWSC, Distributors
                              and DWTC and Director of DWTC; Vice President
                              of the Dean Witter Funds and the TCW/DW Funds.

Rajesh K. Gupta
Senior Vice President         Vice President of various Dean Witter Funds.

Kenton J. Hinchcliffe
Senior Vice President         Vice President of various Dean Witter Funds.

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

Jenny Beth Jones              Vice President of Dean Witter Special Value Fund.
Senior Vice President

John B. Kemp, III             Director of the Provident Savings Bank, Jersey
Senior Vice President         City, New Jersey.

Anita Kolleeny
Senior Vice President         Vice President of various Dean Witter Funds.

Jonathan R. Page
Senior Vice President         Vice President of various Dean Witter Funds.

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

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

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

Elizabeth A. Vetell
Senior Vice President

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



                                        7
<PAGE>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION

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

Thomas F. Caloia              First Vice President and Assistant Treasurer of
First Vice President          DWSC, Assistant Treasurer of Distributors;
and Assistant                 Treasurer and Chief Financial Officer of the
Treasurer                     Dean Witter Funds and the TCW/DW Funds.

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

Barry Fink                    First Vice President and Assistant Secretary of
First Vice President          DWSC; Assistant Secretary of the Dean Witter
and Assistant Secretary       Funds and the TCW/DW Funds.

Michael Interrante            First Vice President and Controller of DWSC;
First Vice President          Assistant Treasurer of Distributors;First Vice
and Controller                President and Treasurer of DWTC.


Robert Zimmerman
First Vice President

Joan Allman
Vice President

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

Kirk Balzer
Vice President                Vice President of various Dean Witter Funds.

Douglas Brown
Vice President

Philip Casparius
Vice President

Thomas Chronert
Vice President

Rosalie Clough
Vice President

Patricia A. Cuddy
Vice President                Vice President of various Dean Witter Funds.


                                        8
<PAGE>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION

B. Catherine Connelly
Vice President

Salvatore DeSteno
Vice President                Vice President of DWSC.

Frank J. DeVito
Vice President                Vice President of DWSC.

Dwight Doolan
Vice President

Bruce Dunn
Vice President

Jeffrey D. Geffen
Vice President

Deborah Genovese
Vice President

Peter W. Gurman
Vice President

John Hechtlinger
Vice President

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

Elizabeth Hinchman
Vice President

David Hoffman
Vice President

David Johnson
Vice President

Christopher Jones
Vice President

James Kastberg
Vice President

Stanley Kapica
Vice President



                                        9
<PAGE>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION

Michael Knox
Vice President                Vice President of various Dean Witter Funds.

Konrad J. Krill
Vice President                Vice President of various Dean Witter Funds.

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

Thomas Lawlor
Vice President

Gerard Lian
Vice President                Vice President of various Dean Witter Funds.

LouAnne D. McInnis            Vice President and Assistant Secretary of DWSC;
Vice President and            Assistant Secretary of the Dean Witter Funds and
Assistant Secretary           the TCW/DW Funds.

Sharon K. Milligan
Vice President

Julie Morrone
Vice President

David Myers
Vice President

James Nash
Vice President

Richard Norris
Vice President

Anne Pickrell
Vice President                Vice President of Dean Witter Global Short-
                              Term Income Fund Inc.
Hugh Rose
Vice President

Robert Rossetti
Vice President

Ruth Rossi                    Vice President and Assistant Secretary of DWSC;
Vice President and            Assistant Secretary of the Dean Witter Funds and
Assistant Secretary           the TCW/DW Funds.

Carl F. Sadler
Vice President


                                       10
<PAGE>


NAME AND POSITION             OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
WITH DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.             AND NATURE OF CONNECTION

Rafael Scolari
Vice President                Vice President of Prime Income Trust.

Peter Seeley                  Vice President of Dean Witter World
Vice President                Wide Income Trust.

Jayne M. Stevlingson
Vice President                Vice President of various Dean Witter Funds.

Kathleen Stromberg
Vice President                Vice President of various Dean Witter Funds.

Vinh Q. Tran
Vice President                Vice President of various Dean Witter Funds.

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

Item 29.    PRINCIPAL UNDERWRITERS

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

 (1)             Dean Witter Liquid Asset Fund Inc.
 (2)             Dean Witter Tax-Free Daily Income Trust
 (3)             Dean Witter California Tax-Free Daily Income Trust
 (4)             Dean Witter Retirement Series
 (5)             Dean Witter Dividend Growth Securities Inc.
 (6)             Dean Witter Global Asset Allocation
 (7)             Dean Witter World Wide Investment Trust
 (8)             Dean Witter Capital Growth Securities
 (9)             Dean Witter Convertible Securities Trust
(10)             Active Assets Tax-Free Trust
(11)             Active Assets Money Trust
(12)             Active Assets California Tax-Free Trust
(13)             Active Assets Government Securities Trust
(14)             Dean Witter Short-Term Bond Fund
(15)             Dean Witter Mid-Cap Growth Fund
(16)             Dean Witter U.S. Government Securities Trust
(17)             Dean Witter High Yield Securities Inc.
(18)             Dean Witter New York Tax-Free Income Fund
(19)             Dean Witter Tax-Exempt Securities Trust
(20)             Dean Witter California Tax-Free Income Fund
(21)             Dean Witter Limited Term Municipal Trust
(22)             Dean Witter Natural Resource Development Securities Inc.
(23)             Dean Witter World Wide Income Trust
(24)             Dean Witter Utilities Fund
(25)             Dean Witter Strategist Fund


                                       11
<PAGE>


(26)             Dean Witter New York Municipal Money Market Trust
(27)             Dean Witter Intermediate Income Securities
(28)             Prime Income Trust
(29)             Dean Witter European Growth Fund Inc.
(30)             Dean Witter Developing Growth Securities Trust
(31)             Dean Witter Precious Metals and Minerals Trust
(32)             Dean Witter Pacific Growth Fund Inc.
(33)             Dean Witter Multi-State Municipal Series Trust
(34)             Dean Witter Federal Securities Trust
(35)             Dean Witter Short-Term U.S. Treasury Trust
(36)             Dean Witter Diversified Income Trust
(37)             Dean Witter Health Sciences Trust
(38)             Dean Witter Global Dividend Growth Securities
(39)             Dean Witter American Value Fund
(40)             Dean Witter U.S. Government Money Market Trust
(41)             Dean Witter Global Short-Term Income Fund Inc.
(42)             Dean Witter Premier Income Trust
(43)             Dean Witter Value-Added Market Series
(44)             Dean Witter Global Utilities Fund
(45)             Dean Witter High Income Securities
(46)             Dean Witter National Municipal Trust
(47)             Dean Witter International SmallCap Fund
(48)             Dean Witter Balanced Growth Fund
(49)             Dean Witter Balanced Income Fund
(50)             Dean Witter Hawaii Municipal Trust
(51)             Dean Witter Variable Investment Series
(52)             Dean Witter Capital Appreciation Fund
(53)             Dean Witter Intermediate Term U.S. Treasury Trust
(54)             Dean Witter Information Fund
(55)             Dean Witter Japan Fund
(56)             Dean Witter Income Builder Fund
(57)             Dean Witter Special Value Fund
 (1)             TCW/DW Core Equity Trust
 (2)             TCW/DW North American Government Income Trust
 (3)             TCW/DW Latin American Growth Fund
 (4)             TCW/DW Income and Growth Fund
 (5)             TCW/DW Small Cap Growth Fund
 (6)             TCW/DW Balanced Fund
 (7)             TCW/DW Total Return Trust
 (8)             TCW/DW Mid-Cap Equity Trust
 (9)             TCW/DW Global Telecom Trust
 (10)            TCW/DW Strategic Income Trust

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



                                       12
<PAGE>


                                              Positions and
                                              Office with
Name                                          Distributors
- ----                                          -------------
Fredrick K. Kubler                           Senior Vice President, Assistant
                                             Secretary and Chief Compliance
                                             Officer.


Michael T. Gregg                             Vice President and Assistant
                                             Secretary.

Item 30.    LOCATION OF ACCOUNTS AND RECORDS

       All accounts, books and other documents required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the Rules thereunder are
maintained by the Investment Manager at its offices, except records relating to
holders of shares issued by the Registrant, which are maintained by the
Registrant's Transfer Agent, at its place of business as shown in the
prospectus.


Item 31.    MANAGEMENT SERVICES

        Registrant is not a party to any such management-related service
contract.


Item 32.    UNDERTAKINGS

            None.


<PAGE>


                                   SIGNATURES
                                   ----------

     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it meets all of
the requirements for effectiveness of this Registration Statement pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-
Effective Amendment to the Registration Statement to be signed on its behalf by
the undersigned, thereunto duly authorized, in the City of New York and State of
New York on the 16th day of October, 1996.

                                          DEAN WITTER LIQUID ASSET FUND INC.

                                       By      /s/ Sheldon Curtis
                                          ----------------------------------
                                                   Sheldon Curtis
                                           Vice President and Secretary

     Pursuant to the requirements of the Securities Act of 1933, this Post-
Effective Amendment No. 33 has been signed below by the following persons in the
capacities and on the dates indicated.

     Signatures                    Title                     Date
     ----------                    -----                     ----

(1) Principal Executive Officer    President, Chief
                                   Executive Officer,
                                   Director and Chairman
By  /s/ Charles A. Fiumefreddo                             10/16/96
    ----------------------------
        Charles A. Fiumefreddo

(2) Principal Financial Officer    Treasurer and Principal
                                   Accounting Officer

By  /s/ Thomas F. Caloia                                   10/16/96
    ----------------------------
        Thomas F. Caloia

(3) Majority of the Directors

    Charles A. Fiumefreddo (Chairman)
    Philip J. Purcell


By  /s/ Sheldon Curtis                                     10/16/96
    ----------------------------
      Sheldon Curtis
        Attorney-in-Fact

    Michael Bozic
    Edwin J.Garn
    John R. Haire
    Manuel H. Johnson
    Michael E. Nugent
    John L. Schroeder

By  /s/ David M. Butowsky                                 10/16/96
    ----------------------------
      David M. Butowsky
        Attorney-in-Fact

<PAGE>


                       DEAN WITTER LIQUID ASSET FUND INC.

                                  EXHIBIT INDEX


     Exhibit No.                   Description
     -----------                   -----------


          8.    -   Amendment to the Custody Agreement between
                    the Registrant and The Bank of New York

         11.    -   Consent of Independent Accountants

         16.    -   Schedules for Computation of Performance
                    Quotations

         27.    -   Financial Data Schedule


      All other exhibits previously filed and incorporated by
      reference.




<PAGE>

                         AMENDMENT TO CUSTODY AGREEMENT


     Amendment made as of this 17th day of April, 1996 by and between Dean 
Witter Liquid Asset Fund Inc.(the "Fund") and The Bank of New York (the
"Custodian") to the Custody Agreement between the Fund and the Custodian dated
September 20, 1991 (the "Custody Agreement").  The Custody Agreement is hereby
amended as follows:

     Article XV Section 8 of the Custody Agreement shall be deleted and be
replaced by Sections 8.(a), 8.(b) and 8.(c) as set forth below:

     "8.  (a)  The Custodian will use reasonable care with respect to its 
obligations under this Agreement and the safekeeping of Securities and moneys 
owned by the Fund.  The Custodian shall indemnify the Fund against and save 
the Fund harmless from all liability, claims, losses and demands whatsoever, 
including attorneys' fees, howsoever arising or incurred as the result of the 
failure of a subcustodian which is a banking insitution located in a foreign 
country and identified on Schedule A attached hereto and as amended from time 
to time upon mutual agreement of the parties (each, a "Subcustodian") to 
exercise reasonable care with respect to the safekeeping of such Securities 
and moneys to the same extent that the Custodian would be liable to the Fund 
if the Custodian were holding such securities and moneys in New York.  In the 
event of any loss to the Fund by reason of the failure of the Custodian or a 
Subcustodian to utilize reasonable care, the Custodian shall be liable to the 
Fund only to the extent of the Fund's direct damages, to be determined based 
on the market value of the Securities and moneys which are the subject of the 
loss at the date of discovery of such loss and without reference to any 
special conditions or circumstances.

     8.  (b)  The Custodian shall not be liable for any loss which results from
(i) the general risk of investing, or (ii) investing or holding Securities and
moneys in a particular country including, but not limited to, losses resulting
from nationalization, expropriation or other governmental actions; regulation of
the banking or securities industry; currency restrictions, devaluations or
fluctuations; or market conditions which prevent the orderly execution of
securities transactions or affect the value of Securities or moneys.

     8.  (c)  Neither party shall be liable to the other for any loss due to
forces beyond its control including, but not limited to, strikes or work
stoppages, acts of war or terrorism, insurrection, revolution, nuclear fusion,
fission or radiation, or acts of God."

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective Officers, thereunto duly authorized and their
respective seals to be hereunto affixed, as of the day and year first above
written.


                        DEAN WITTER LIQUID ASSET FUND INC.


[SEAL]                                       By:/s/ David A. Hughey
                                                ---------------------

Attest:


/s/ Robert M. Scanlan
- ------------------------


                                             THE BANK OF NEW YORK


[SEAL]                                       By:/s/ Steve Grunston
                                                ---------------------


Attest:


/s/ Vincent Blazewitcz
- ------------------------


<PAGE>

                         SCHEDULE A


COUNTRY/MARKET                     SUBCUSTODIAN
- --------------                     ------------

Argentina                          The Bank of Boston
Australia                          ANZ Banking Group Limited
Austria                            Girocredit Bank AG
Bangladesh*                        Standard Chartered Bank
Belgium                            Banque Bruxelles Lambert
Botswana*                          Stanbic Bank Botswana Ltd.
Brazil                             The Bank of Boston
Canada                             Royal Trust/Royal Bank of Canada
Chile                              The Bank of Boston/Banco de Chile
China                              Standard Chartered Bank
Colombia                           Citibank, N.A.
Denmark                            Den Danske Bank
Euromarket                         CEDEL
                                   Euroclear
                                   First Chicago Clearing Centre
Finland                            Union Bank of Finland
France                             Banque Paribas/Credit Commercial de France
Germany                            Dresdner Bank A.G.
Ghana*                             Merchant Bank Ghana Ltd.
Greece                             Alpha Credit Bank
Hong Kong                          Hong Kong and Shanghai Banking Corp.
Indonesia                          Hong Kong and Shanghai Banking Corp.
Ireland                            Allied Irish Bank
Israel                             Israel Discount Bank
Italy                              Banca Commerciale Italiana
Japan                              Yasuda Trust & Banking Co., Lt.
Korea                              Bank of Seoul
Luxembourg                         Kredietbank S.A.
Malaysia                           Hong Kong Bank Malaysia Berhad
Mexico                             Banco Nacional de Mexico (Banamex)
Netherlands                        Mees Pierson
New Zealand                        ANZ Banking Group Limited
Norway                             Den Norske Bank
Pakistan                           Standard Chartered Bank
Peru                               Citibank, N.A.
Philippines                        Hong Kong and Shanghai Banking Corp.
Poland                             Bank Handlowy w Warsawie
Portugal                           Banco Comercial Portugues
Singapore                          United Overseas Bank
South Africa                       Standard Bank of South Africa Limited
Spain                              Banco Bilbao Vizcaya
Sri Lanka                          Standard Chartered Bank

<PAGE>

                         SCHEDULE A

COUNTRY/MARKET                     SUBCUSTODIAN
- --------------                     ------------

Sweden                             Skandinaviska Enskilda Banken
Switzerland                        Union Bank of Switzerland
Taiwan                             Hong Kong and Shanghai Banking Corp.
Thailand                           Siam Commercial Bank
Turkey                             Citibank, N.A.
United Kingdom                     The Bank of New York
United States                      The Bank of New York
Uruguay                            The Bank of Boston
Venezuela                          Citibank N.A.
Zimbabwe*                          Stanbic Bank Zimbabwe Ltd.



















*Not yet 17(f)5 compliant

<PAGE>


CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the use in the Prospectus constituting part of this 
Post-Effective Amendment No. 33 to the Registration Statement on Form N-1A 
(the "Registration Statement") of our report dated October 7, 1996, relating 
to the financial statements and financial highlights of Dean Witter Liquid 
Asset Fund Inc., which appears in such Prospectus, and to the incorporation 
by reference of our report into the Statement of Additional Information which 
constitutes part of this Registration Statement.  We also consent to the 
references to us under the heading "Financial Highlights" in the Prospectus 
and under the headings "Independent Accountants" and "Experts" in the 
Statement of Additional Information.


/s/ Price Waterhouse LLP
PRICE WATERHOUSE LLP
1177 Avenue of the Americas
New York, New York  10036
October 7, 1996


<PAGE>


     DEAN WITTER LIQUID ASSET FUND INC

     Exhibit 16:  Schedule for computation of each performance
     quotation provided in the Statement of Additional Information.


(16) The Fund's current yield for the seven days ending
     August 31, 1996

      (A-B)   x   365/N

      (1.0009664 -1)  x  365/7      =   5.04%

     The Fund's effective annualized yield for the seven days ending
     August 31, 1995

           365/N
     A                    - 1

               365/7
     1.0009664              - 1        =     5.17%

     A =  Value of  a share of the Fund at end of period.
     B =  Value of  a share of the Fund at beginning of period.
     N =  Number of days in the  period.


CALCULATION

(1.0009664 -1)  x  365/7
                 = 5.04%

((1.0009664)  ^ 52.14285714-1)
                 = 5.17%




<PAGE>



     SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
          DEAN WITTER LIQUID ASSET FUND INC.


(A)  GROWTH OF $10,000
(B)  GROWTH OF $50,000
(C)  GROWTH OF $100,000


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

<TABLE>
<CAPTION>

INVESTED - P        TOTAL
$10,000, $50,000 &  RETURN - TR    (A)   GROWTH OF            (B)   GROWTH OF             (C)   GROWTH OF
$100,000            31-Aug-96    $10,000 INVESTMENT- G        $50,000 INVESTMENT- G         $100,000 INVESTMENT- G
- -----------       ----------  -------------- -----------    -----------    -----------    ----------- ------------
<S>               <C>         <C>                           <C>                           <C>
22-Sep-75            376.66               $47,666                       $238,330                  $476,660
</TABLE>












<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          AUG-31-1996
<PERIOD-START>                             SEP-01-1995
<PERIOD-END>                               AUG-31-1996
<INVESTMENTS-AT-COST>                   11,460,865,151
<INVESTMENTS-AT-VALUE>                  11,460,865,151
<RECEIVABLES>                               22,859,308
<ASSETS-OTHER>                                 270,264
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                          11,483,994,723
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   94,526,073
<TOTAL-LIABILITIES>                         94,526,073
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                11,388,779,903
<SHARES-COMMON-STOCK>                   11,389,451,097
<SHARES-COMMON-PRIOR>                   10,359,464,532
<ACCUMULATED-NII-CURRENT>                      688,747
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                            11,389,468,650
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                          626,139,047
<OTHER-INCOME>                                       0
<EXPENSES-NET>                              69,507,441
<NET-INVESTMENT-INCOME>                    556,631,606
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                      556,631,606
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  556,625,540
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                 31,284,601,651
<NUMBER-OF-SHARES-REDEEMED>           (30,809,583,472)
<SHARES-REINVESTED>                        554,968,386
<NET-CHANGE-IN-ASSETS>                   1,029,992,631
<ACCUMULATED-NII-PRIOR>                        682,681
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                       30,669,867
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                             69,507,441
<AVERAGE-NET-ASSETS>                    11,126,557,378
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                  0.050
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                           (0.050)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.63
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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