Schedule 14A Information required in proxy statement.
                            Schedule 14A Information
           Proxy Statement Pursuant to Section 14(a) of the Securities
                     Exchange Act of 1934 (Amendment No.__)



Filed by the Registrant [ X ]
Filed by a Party other than the Registrant [    ]


Check the appropriate box:

[ X ]   Preliminary Proxy Statement
[   ]   Preliminary Additional Materials
[   ]   Confidential, for Use of the Commission Only (as 
        permitted by Rule 14a-6(e)(2))
[   ]   Definitive Proxy Statement
[   ]   Definitive Additional Materials
[   ]   Soliciting Material Pursuant to Section 240.149-11(c) or
        Section 240.14a-12

- --------------------------------------------------------------------------------
     High Income Advantage Trust III
        (Name of Registrant(s) Specified in its Charter)
- --------------------------------------------------------------------------------
     Lou Anne McInnis
        (Name of Person(s) Filing Proxy Statement)
- --------------------------------------------------------------------------------

       Payment of Filing Fee (check the appropriate box):


[ x  ]  No fee required.
[    ]  Fee computed on table below per Exchange Act Rules
        14a-6(j)(4) and 0-11.


1)   Title of each class of securities to which transaction
     applies:
- --------------------------------------------------------------------------------

2)   Aggregate number of securities to which transaction applies:
- --------------------------------------------------------------------------------

3)   Per unit price or other underlying value of transaction
     computed pursuant to Exchange Act Rule 0-11:
- --------------------------------------------------------------------------------
     Set forth the amount on which the filing fee is calculated
     and state how it was determined.

4)   Proposed maximum aggregate value of transaction:
- --------------------------------------------------------------------------------

5)   Fee previously paid:
- --------------------------------------------------------------------------------

[    ]  Check box if any part of the fee is offset as provided by
        Exchange Act Rule 0-11(a)(2) and identify the filing for
        which the offsetting fee was paid previously.  Identify
        the previous filing by registration statement number, or
        the Form or Schedule and the date of its filing.

1)   Amount Previously Paid:
- --------------------------------------------------------------------------------

2)   Form, Schedule or Registration Statement No.:
- --------------------------------------------------------------------------------

3)   Filing Party:
- --------------------------------------------------------------------------------

4)   Date Filed:
- --------------------------------------------------------------------------------


                        HIGH INCOME ADVANTAGE TRUST III
                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
                             TO BE HELD MAY 1, 1997
 
    The  Annual Meeting of Shareholders (the "Meeting") of HIGH INCOME ADVANTAGE
TRUST III (the "Trust"),  an unincorporated business  trust organized under  the
laws  of  the  Commonwealth  of  Massachusetts,  will  be  held  in  the  Career
Development Room, Sixty-First Floor,  2 World Trade Center,  New York, New  York
10048,  on May  1, 1997, at  10:00 a.m., New  York City time,  for the following
purposes:
 
        1.  To elect four (4) Trustees,  two (2) to serve until the 2000  Annual
    Meeting,  one (1) to serve until the     Annual Meeting and one (1) to serve
    until the     Annual Meeting, or, in each case, until their successors shall
    have been elected and qualified;
 
        2.   To approve  or  disapprove a  new Investment  Management  Agreement
    between  the  Trust  and  Dean  Witter  InterCapital  Inc.,  a  wholly-owned
    subsidiary of Dean Witter,  Discover & Co. ("DWDC")  in connection with  the
    proposed merger of Morgan Stanley Group Inc. with DWDC;
 
        3.   To ratify  or reject the  selection of Price  Waterhouse LLP as the
    Trust's independent accountants for the fiscal year ending January 31, 1998;
    and
 
        4.  To  transact such  other business as  may properly  come before  the
    Meeting or any adjournments thereof.
 
    Shareholders  of record as  of the close  of business on  March 12, 1997 are
entitled to notice of and  to vote at the Meeting.  If you cannot be present  in
person,  your management would  greatly appreciate your  filling in, signing and
returning the enclosed proxy promptly in the envelope provided for that purpose.
 
    In the event  that the  necessary quorum to  transact business  or the  vote
required  to approve or reject any proposal  is not obtained at the Meeting, the
persons named as proxies may propose one or more adjournments of the Meeting for
a total of not more than 60 days in the aggregate to permit further solicitation
of proxies.  Any such  adjournment  will require  the  affirmative vote  of  the
holders of a majority of the Trust's shares present in person or by proxy at the
Meeting.  The persons named  as proxies will  vote in favor  of such adjournment
those proxies which they are  entitled to vote in favor  of Proposal 2 and  will
vote  against any  such adjournment those  proxies required to  be voted against
that proposal.
 
                                                   BARRY FINK
                                                    SECRETARY
March 17, 1997
New York, New York
 
                                    IMPORTANT
      YOU CAN  HELP THE  TRUST  AVOID THE  NECESSITY  AND EXPENSE  OF  SENDING
  FOLLOW-UP  LETTERS TO  ENSURE A  QUORUM BY  PROMPTLY RETURNING  THE ENCLOSED
  PROXY. IF YOU ARE UNABLE TO BE  PRESENT IN PERSON, PLEASE FILL IN, SIGN  AND
  RETURN  THE  ENCLOSED  PROXY  IN  ORDER THAT  THE  NECESSARY  QUORUM  MAY BE
  REPRESENTED AT THE  MEETING. THE  ENCLOSED ENVELOPE REQUIRES  NO POSTAGE  IF
  MAILED IN THE UNITED STATES.

                        HIGH INCOME ADVANTAGE TRUST III
                TWO WORLD TRADE CENTER, NEW YORK, NEW YORK 10048
 
                             ---------------------
 
                                PROXY STATEMENT
                             ---------------------
 
                         ANNUAL MEETING OF SHAREHOLDERS
 
                                  MAY 1, 1997
 
    This  statement is furnished in connection  with the solicitation of proxies
by the Board of  Trustees (the "Board" or  "Trustees") of HIGH INCOME  ADVANTAGE
TRUST  III (the "Trust"), for  use at the Annual  Meeting of Shareholders of the
Trust to  be held  on  May 1,  1997 (the  "Meeting"),  and at  any  adjournments
thereof.
 
    If  the enclosed form of proxy is  properly executed and returned in time to
be voted  at  the  Meeting, the  proxies  named  therein will  vote  the  shares
represented  by the  proxy in accordance  with the  instructions marked thereon.
Unmarked proxies will be voted for each of the nominees for election as  Trustee
and  in favor of  Proposals 2 and 3  set forth in the  attached Notice of Annual
Meeting of  Shareholders. A  proxy  may be  revoked at  any  time prior  to  its
exercise  by any of the following: written notice of revocation to the Secretary
of the Trust, execution and delivery of a later dated proxy to the Secretary  of
the  Trust (if  returned and received  in time  to be voted),  or attendance and
voting at the  Meeting. Attendance  at the  Meeting will  not in  and of  itself
revoke a proxy.
 
    Holders of shares of the Trust ("Shareholders") of record as of the close of
business   on  March  12,  1997,  the  record  date  for  the  determination  of
Shareholders entitled to notice of and to  vote at the Meeting, are entitled  to
one  vote for each share  held and a fractional vote  for a fractional share. On
March 12, 1997, there were outstanding             shares of beneficial interest
of the Trust, all with $.01 par value. No person was known to own as much as  5%
of the outstanding shares of the Trust on that date. The percentage ownership of
shares  of the Trust changes from time  to time depending on purchases and sales
by shareholders and the total number of shares outstanding. The first mailing of
this Proxy Statement is expected to be made on or about March 17, 1997.
 
    The cost of soliciting  proxies for the  Meeting, consisting principally  of
printing  and mailing expenses, which is  not expected to exceed $     , will be
borne by the Trust, except  that costs relating to Proposal  2 will be borne  by
Dean  Witter, Discover &  Co. ("DWDC"). The  solicitation of proxies  will be by
mail, which may be supplemented by solicitation by mail, telephone or  otherwise
through  Trustees, officers  of the Trust  or officers and  regular employees of
Dean Witter InterCapital Inc. ("InterCapital" or the "Investment Manager"), Dean
Witter Trust Company ("DWTC"), Dean Witter Services Company Inc. ("DWSC") and/or
employees of  broker-dealers,  including  Dean  Witter  Reynolds  Inc.  ("DWR"),
without special compensation therefor. In addition, the Trust may employ William
F.  Doring & Co. as proxy solicitor, the cost of which is not expected to exceed
$     and will be  borne by DWDC.  With respect to  a telephone solicitation  by
William  F. Doring & Co.,  additional expenses would include $     per telephone
vote transacted, $      per  outbound telephone  contact and  costs relating  to
obtaining Shareholders' telephone numbers.
 
    William  F. Doring & Co. and DWTC may call Shareholders to ask if they would
be willing  to have  their votes  recorded by  telephone. The  telephone  voting
procedure  is  designed  to  authenticate  Shareholders'  identities,  to  allow
Shareholders to authorize the  voting of their shares  in accordance with  their
instructions and to confirm that
 
                                       2

their  instructions have been recorded properly.  No recommendation will be made
as to how a Shareholder should vote on  any proposal other than to refer to  the
recommendations  of the Board. The Trust has  been advised by counsel that these
procedures are consistent with the requirements of applicable law.  Shareholders
voting  by telephone  will be  asked for their  social security  number or other
identifying information and will be given an opportunity to authorize proxies to
vote their shares  in accordance  with their  instructions. To  ensure that  the
Shareholders'  instructions  have been  recorded correctly  they will  receive a
confirmation of their instructions in the mail. A special toll-free number  will
be available in case the information contained in the confirmation is incorrect.
Although  a Shareholder's vote may be  taken by telephone, each Shareholder will
receive a copy of this Proxy Statement  and may vote by mail using the  enclosed
proxy card.
 
                            (1) ELECTION OF TRUSTEES
 
    The  number of  Trustees has  been fixed  by the  Trustees, pursuant  to the
Trust's Declaration of  Trust, as  amended, at  ten. There  are presently  eight
Trustees,  two of whom  (Michael Bozic and Charles  A. Fiumefreddo) are standing
for  election  at  this  Meeting  to  serve  until  the  2000  Annual   Meeting.
Additionally,  two nominees  to the Trust's  Board of Trustees  are standing for
election at the Meeting for the first time, one, if elected, to serve until  the
    Annual  Meeting and, one, if elected, to serve until the     Annual Meeting,
all in accordance with the Trust's Declaration of Trust, as amended.
 
    Six of the  current eight Trustees  (Michael Bozic, Edwin  J. Garn, John  R.
Haire,  Manuel  H.  Johnson,  Michael  E.  Nugent  and  John  L.  Schroeder) are
"Independent Trustees," that is,  Trustees who are  not "interested persons"  of
the  Trust, as that  term is defined in  the Investment Company  Act of 1940, as
amended (the "1940 Act"). Mr.        and Mr.        who have been nominated  for
election  at the  Meeting, if  elected, also  will be  Independent Trustees. The
other two current  Trustees, Charles A.  Fiumefreddo and Philip  J. Purcell  are
"interested  persons" (as that term is defined in the 1940 Act) of the Trust and
InterCapital and thus are NOT Independent Trustees. The nominees for election as
Independent Trustees have been proposed by the Independent Trustees now serving.
All of  the Trustees  currently  serving have  been  elected previously  by  the
Shareholders.
 
    The  nominees of the Board  of Trustees for election  as Trustees are listed
below. It is the intention of the persons named in the enclosed form of Proxy to
vote the shares represented by them for the election of these nominees:  Michael
Bozic,         ,         and  Charles A. Fiumefreddo. Should any of the nominees
become unable or unwilling to accept nomination, or election, the persons  named
in the Proxy will exercise their voting power in favor of such person or persons
as the Board may recommend. All of the nominees have consented to being named in
this  Proxy Statement and to serve if elected. The Trust knows no reason why any
of said nominees would be unable or unwilling to accept nomination or  election.
The  election of each Trustee requires the  approval of a majority of the shares
of the Trust represented and entitled to vote at the Meeting.
 
    Pursuant to the  provisions of  the Declaration  of Trust,  as amended,  the
nominees  for election as Trustees are divided into three separate classes, each
class having a term  of three years. The  term of office of  one of each of  the
three classes will expire each year.
 
    The  Board previously  determined that any  nominee for  election as Trustee
shall be standing for  election as Trustee  and serve as Trustee  in one of  the
three  classes of Trustees as follows: Class I -- Messrs. Bozic, Fiumefreddo and
[            ]; Class II -- Messrs.  Johnson, Schroeder and [            ];  and
Class  III -- Messrs. Garn, Haire, Nugent  and Purcell. Each nominee for Trustee
will, if elected, serve a  term of up to  approximately three years running  for
the  period assigned  to that class  and terminating  at the date  of the Annual
Meeting of Shareholders so designated by the Board, or any adjournment  thereof.
In accordance with the above,
 
                                       3

the  Trustees  in Class  I are  standing for  election at  this Meeting  and, if
elected, will serve  until the  2000 Annual  Meeting or  until their  successors
shall  have been elected and  qualified, and, with respect  to the new nominees,
one Trustee in Class   and one Trustee  in Class   are standing for election  at
the  Meeting and, if elected, will serve until the      and     Annual Meetings,
respectively, or until their successors  shall have been elected and  qualified.
As  a consequence of this  method of election, the  replacement of a majority of
the Board could be delayed for up to two years.
 
    The following information  regarding each  of the nominees  for election  as
Trustee, and each of the members of the Board includes his principal occupations
and  employment for at least  the last five years, his  age, shares of the Trust
owned, if any, as of March 12,  1997 (shown in parentheses), positions with  the
Trust,  and  directorships  or  trusteeships in  companies  which  file periodic
reports with the Securities and Exchange Commission, including the 84 investment
companies, including  the Trust,  for which  InterCapital serves  as  investment
manager  or investment adviser  (referred to herein as  the "Dean Witter Funds")
and  the  14   investment  companies  for   which  InterCapital's   wholly-owned
subsidiary,  DWSC, serves  as manager and  TCW Funds Management,  Inc. serves as
investment adviser (referred to herein as the "TCW/DW Funds").
 
    The nominees for Trustee to be elected at this Meeting are:
 
    MICHAEL BOZIC,  Trustee  since  April,  1994; age  56;  Chairman  and  Chief
Executive  Officer  of  Levitz  Furniture  Corporation  (since  November, 1995);
Director or  Trustee of  the Dean  Witter Funds;  formerly President  and  Chief
Executive  Officer of Hills  Department Stores (May,  1991-July, 1995); formerly
variously Chairman,  Chief  Executive  Officer, President  and  Chief  Operating
Officer  (1987-1991) of  the Sears Merchandise  Group of Sears,  Roebuck and Co.
("Sears"); Director  of Eaglemark  Financial Services,  Inc., the  United  Negro
College Fund and Weirton Steel Corporation.
 
    CHARLES  A. FIUMEFREDDO, Trustee  since July, 1991;  age 63; Chairman, Chief
Executive  Officer  and   Director  of  InterCapital,   DWSC  and  Dean   Witter
Distributors  Inc. ("Distributors");  Executive Vice  President and  Director of
DWR; Chairman, Director or Trustee, President and Chief Executive Officer of the
Dean Witter Funds; Chairman, Chief Executive  Officer and Trustee of the  TCW/DW
Funds;  Chairman and Director  of DWTC; Director and/or  officer of various DWDC
subsidiaries; formerly  Executive Vice  President and  Director of  DWDC  (until
February, 1993).
 
                                  [new person]
 
                                  [new person]
 
                                       4

    The Trustees who are not standing for re-election at this Meeting are:
 
    EDWIN  JACOB (JAKE) GARN,  Trustee since January, 1993;  age 64; Director or
Trustee of  the  Dean Witter  Funds;  formerly United  States  Senator  (R-Utah)
(1974-1992)  and Chairman, Senate Banking  Committee (1980-1986); formerly Mayor
of Salt Lake City, Utah (1971-1974); formerly Astronaut, Space Shuttle Discovery
(April 12-19, 1985); Vice Chairman, Huntsman 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, Trustee since December,  1988; age 72; Chairman of the  Audit
Committee and Chairman of the Committee of the Independent Directors or Trustees
and  Director  or  Trustee of  the  Dean  Witter Funds;  Chairman  of  the Audit
Committee and Chairman of the Committee of the Independent Trustees and  Trustee
of   the  TCW/DW  Funds;  formerly  President,  Council  for  Aid  to  Education
(1978-1989) and Chairman and Chief  Executive Officer of Anchor Corporation,  an
investment  adviser  (1964-1978);  Director of  Washington  National Corporation
(insurance).
 
    DR. MANUEL H.  JOHNSON, Trustee since  July, 1991; age  48; Senior  Partner,
Johnson  Smick International, Inc., a consulting firm; Co-Chairman and a founder
of the  Group of  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); Trustee of the Financial Accounting Foundation (oversight
organization for the FASB); 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,  Trustee since  July,  1991; age  60;  General  Partner,
Triumph  Capital, L.P., a private investment partnership; Director or Trustee of
the Dean Witter  Funds; Trustee of  the TCW/DW Funds;  formerly Vice  President,
Bankers  Trust  Company  and  BT Capital  Corporation  (1984-1988);  director of
various business organizations.
 
    PHILIP J. PURCELL, Trustee since April, 1994; age 53; Chairman of the  Board
of Directors and Chief Executive Officer of DWDC, DWR, and Novus Credit Services
Inc.;  Director of InterCapital,  DWSC and Distributors;  Director or Trustee of
the Dean Witter Funds; Director and/or officer of various DWDC subsidiaries.
 
    JOHN L. SCHROEDER, Trustee since April,  1994; age 66; Retired; Director  or
Trustee  of the  Dean Witter  Funds; Trustee  of the  TCW/DW Funds;  Director of
Citizens  Utilities  Company;  formerly  Executive  Vice  President  and   Chief
Investment  Officer of The Home Insurance Company (August, 1991-September, 1995)
and formerly Chairman  and Chief Investment  Officer of Axe-Houghton  Management
and the Axe-Houghton Funds (April, 1983-June, 1991).
 
    The  executive officers of the Trust other than shown above are: Barry Fink,
Vice  President,  Secretary  and  General  Counsel;  Robert  M.  Scanlan,   Vice
President;  Joseph  J.  McAlinden,  Vice President;  Robert  S.  Giambrone, Vice
President; Peter M. Avelar, Vice President; and Thomas F. Caloia, Treasurer.  In
addition,  Jonathan R.  Page and  James F. Willison  are Vice  Presidents of the
Trust and Marilyn K. Cranney, Lou Anne D. McInnis, Ruth Rossi, Carsten Otto  and
Frank  Bruttomesso serve as Assistant Secretaries. Mr.  Fink is 42 years old and
is currently  First Vice  President (since  June, 1993),  Secretary and  General
Counsel (since February, 1997) of InterCapital and DWSC and (since August, 1996)
Assistant Secretary of DWR; he is also First Vice President, Assistant Secretary
and  Assistant General  Counsel of Distributors  (since February,  1997). He was
previously Vice President, Assistant Secretary and Assistant General Counsel  of
InterCapital  and DWSC. Mr. Scanlan  is 60 years old  and is currently President
and Chief Operating Officer of InterCapital (since March, 1993) and DWSC; he  is
also Executive Vice
 
                                       5

President  of Distributors and Executive Vice President and Director of DWTC. He
was previously Executive Vice President of InterCapital (July, 1992-March, 1993)
and prior thereto  was Chairman  of Harborview Group  Inc. Mr.  McAlinden is  54
years  old  and is  currently Executive  Vice  President of  InterCapital (since
April, 1996); he is also Chief  Investment Officer of InterCapital and  Director
of  DWTC  (since  April,  1996).  He was  previously  Senior  Vice  President of
InterCapital (June, 1995-April, 1996) and prior thereto was a Managing  Director
at  Dillon Read.  Mr. Giambrone  is 42  years old  and is  currently Senior Vice
President of InterCapital, DWSC, Distributors and DWTC (since August, 1995)  and
Director  of DWTC (since  April, 1996). He  was formerly a  partner of KPMG Peat
Marwick, LLP. Mr. Avelar is 38 years old and is currently Senior Vice  President
of  InterCapital.  Mr.  Caloia is  51  years  old and  is  currently  First Vice
President and Assistant Treasurer of InterCapital and DWSC. Mr. Page is 50 years
old and is currently Senior Vice  President of InterCapital. Mr. Willison is  53
years  old and  is currently Senior  Vice President of  InterCapital. Other than
Messrs. Scanlan, Giambrone and McAlinden, each of the above officers has been an
employee of InterCapital or DWR (formerly the corporate parent of  InterCapital)
for over five years.
 
THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES
 
    The  Board of Trustees currently 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
Proxy Statement, there are  a total of  84 Dean Witter  Funds, comprised of  127
portfolios.  As of February 28, 1997, the Dean Witter Funds had total net assets
of approximately $            billion and more than six million shareholders.
 
    Six Trustees and  the two new  nominees (80%  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.  The other two  Trustees (the  "Management Trustees") are
affiliated with InterCapital.  For a period  of at least  three years after  the
consummation of the merger between Morgan Stanley Group Inc. with DWDC, at least
75%  of the members  of the Board of  Trustees of the  Trust will be "interested
persons" (as  defined  in  the  1940  Act) of  InterCapital.  Four  of  the  six
Independent Trustees are also Independent Trustees of the TCW/DW Funds.
 
    Law and regulation establish both general guidelines and specific duties for
the  Independent Trustees.  The Dean Witter  Funds seek  as Independent Trustees
individuals of distinction  and experience in  business and finance,  government
service  or academia; these are people whose advice and counsel are in demand by
others and for  whom there is  often competition.  To accept a  position on  the
Funds'  Boards, such individuals may reject other attractive assignments because
the Funds make  substantial demands  on their time.  Indeed, by  serving on  the
Funds'  Boards, certain Trustees who would  otherwise be qualified and in demand
to serve on bank boards would be prohibited by law from doing so.
 
    All of  the current  Independent  Trustees serve  as  members of  the  Audit
Committee  and the  Committee of  the Independent  Trustees. Three  of them also
serve as members of the Derivatives Committee. 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 Funds do not have any  nominating
or compensation committees.
 
    The  Committee of the  Independent Trustees is  charged with recommending to
the full Board  approval of management,  advisory and administration  contracts,
distribution and underwriting agreements; continually
 
                                       6

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 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.
 
    For the fiscal year  ended January 31,  1997, the Board  of Trustees of  the
Trust  held  seven  meetings, and  the  Audit  Committee, the  Committee  of the
Independent Trustees and the  Derivatives Committee of the  Trust held two,  ten
and  three meetings,  respectively. No  Trustee attended  fewer than  75% of the
meetings of the  Board of Trustees,  the Audit Committee,  the Committee of  the
Independent  Trustees or the Derivatives Committee  held while he served in such
positions.
 
DUTIES OF CHAIRMAN OF COMMITTEE OF THE INDEPENDENT TRUSTEES AND AUDIT COMMITTEE
 
    The Chairman of  the Committee  of the  Independent Trustees  and the  Audit
Committee  maintains an  office at  the Funds' headquarters  in New  York. He is
responsible for keeping abreast of regulatory and industry developments and  the
Funds'  operations and management. He  screens and/or prepares written materials
and identifies  critical  issues  for  the  Independent  Trustees  to  consider,
develops  agendas  for Committee  meetings, determines  the  type and  amount of
information that the Committees will need to form a judgment on various  issues,
and  arranges to have  that information furnished to  Committee members. He also
arranges for  the services  of independent  experts and  consults with  them  in
advance  of meetings  to help  refine reports and  to focus  on critical issues.
Members of the Committees believe that the person who serves as Chairman of both
Committees and guides their efforts is  pivotal to the effective functioning  of
the Committees.
 
    The  Chairman of the  Committees also maintains  continuous contact with the
Funds' management, with independent counsel to the Independent Trustees and with
the Funds' independent auditors.  He arranges for a  series of special  meetings
involving  the  annual  review  of  investment  advisory,  management  and other
operating contracts of  the Funds  and, on  behalf of  the Committees,  conducts
negotiations with the Investment Manager and other service providers. In effect,
the  Chairman of the Committees  serves as a combination  of chief executive and
support staff of the Independent Trustees.
 
    The Chairman of  the Committee  of the  Independent Trustees  and the  Audit
Committee  is  not  employed by  any  other  organization and  devotes  his time
primarily to  the services  he performs  as Committee  Chairman and  Independent
Trustee  of the Dean Witter Funds and  as an Independent Trustee and, since July
1, 1996, as Chairman of the Committee of the Independent Trustees and the  Audit
Committee  of the TCW/DW Funds. The current Committee Chairman has had more than
35 years experience as a senior executive in the investment company industry.
 
                                       7

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.
 
SHARE OWNERSHIP BY TRUSTEES
 
    The Trustees have adopted a policy pursuant to which each Trustee and/or his
or  her spouse is required to invest at least $25,000 in any of the Funds in the
Dean Witter Funds complex (and, if  applicable, in the TCW/DW Funds complex)  on
whose  boards the Trustee serves. In  addition, the policy contemplates that the
Trustees will, over time, increase their aggregate investment in the Funds above
the $25,000 minimum  requirement. The  Trustees may  allocate their  investments
among  specific Funds in any manner they determine is appropriate based on their
individual investment objectives. As of the  date of this Proxy Statement,  each
Trustee is in compliance with the policy. Any future Trustee will be given a one
year  period  following his  or her  election  within which  to comply  with the
foregoing. As of December 31,  1996, the total value  of the investments by  the
Trustees  and/or  their spouses  in shares  of  the Dean  Witter Funds  (and, if
applicable, the TCW/DW Funds) was approximately $9.8 million.
 
    As of the record date  for this Meeting, the  aggregate number of shares  of
beneficial interest of the Trust owned by the Trust's officers and Trustees as a
group  was less  than 1  percent of  the Trust's  shares of  beneficial interest
outstanding.
 
COMPENSATION OF INDEPENDENT TRUSTEES
 
    The Trust 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 Trust  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 Trust  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
Trust who are or have been employed  by the Investment Manager or an  affiliated
company receive no compensation or expense reimbursement from the Trust.
 
                                       8

    The  following  table  illustrates  the  compensation  paid  to  the Trust's
Independent Trustees by the Trust for the fiscal year ended January 31, 1997.
 
                               TRUST COMPENSATION
 


                                                                   AGGREGATE
NAME OF                                                          COMPENSATION
INDEPENDENT TRUSTEE                                             FROM THE TRUST
- --------------------------------------------------------------  ---------------
                                                             
Michael Bozic.................................................      $1,800
Edwin J. Garn.................................................       1,850
John R. Haire.................................................       3,700
Dr. Manuel H. Johnson.........................................       1,800
Michael E. Nugent.............................................       1,800
John L. Schroeder.............................................       1,800

 
    The following  table  illustrates  the  compensation  paid  to  the  Trust's
Independent  Trustees for the calendar year ended December 31, 1996 for services
to the 82 Dean Witter Funds and,  in the case of Messrs. Haire, Johnson,  Nugent
and  Schroeder, the 14 TCW/DW Funds that were in operation at December 31, 1996.
With respect to Messrs. Haire, Johnson,  Nugent and Schroeder, the TCW/DW  Funds
are  included solely because of a limited exchange privilege between those Funds
and five Dean Witter Money Market Funds.
 
           CASH COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS
 


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

 
    As of the date  of this Proxy  Statement, 57 of the  Dean Witter Funds,  not
including   the  Trust,  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
 
                                       9

a maximum of 50.0% after ten years of service. The foregoing percentages may  be
changed  by  the Board.(1)  "Eligible Compensation"  is  one-fifth of  the total
compensation earned by such Eligible Trustee for service to the Adopting Fund in
the five year  period prior to  the date of  the Eligible Trustee's  retirement.
Benefits  under the retirement program are not secured or funded by the Adopting
Funds.
 
    The following  table  illustrates the  retirement  benefits accrued  to  the
Trust's  Independent Trustees  by the  57 Dean  Witter Funds  (not including the
Trust) for  the year  ended  December 31,  1996,  and the  estimated  retirement
benefits   for  the  Trust's  Independent   Trustees,  to  commence  upon  their
retirement, from the 57 Dean Witter Funds as of December 31, 1996.
 
                 RETIREMENT BENEFITS FROM ALL DEAN WITTER FUNDS
 


                                                                             RETIREMENT                       ESTIMATED
                                                                              BENEFITS                         ANNUAL
                                                                             ACCRUED AS                       BENEFITS
                                ESTIMATED                                     EXPENSES                   UPON RETIREMENT(2)
                              CREDITED YEARS       ESTIMATED       ------------------------------   -----------------------------
                              OF SERVICE AT      PERCENTAGE OF                         BY ALL                         FROM ALL
NAME OF                         RETIREMENT          ELIGIBLE                          ADOPTING        FROM THE        ADOPTING
INDEPENDENT TRUSTEE            (MAXIMUM 10)       COMPENSATION      BY THE TRUST        FUNDS           TRUST           FUNDS
- ---------------------------  ----------------   ----------------      -------       -------------   -------------   -------------
                                                                                                  
Michael Bozic..............            10              50.0%                          $    20,147                     $    51,325
Edwin J. Garn..............            10              50.0                                27,772                          51,325
John R. Haire..............            10              50.0                                46,952                         129,550
Dr. Manuel H. Johnson......            10              50.0                                10,926                          51,325
Michael E. Nugent..........            10              50.0                                19,217                          51,325
John L. Schroeder..........             8              41.7                                38,700                          42,771

 
- ---------------
(1)  An Eligible Trustee may elect  alternate payments of his or her  retirement
    benefits  based upon the  combined life expectancy  of such Eligible Trustee
    and his or her spouse on the date of such Eligible Trustee's retirement. The
    amount estimated to be payable under  this method, through the remainder  of
    the  later of  the lives of  such Eligible  Trustee and spouse,  will be the
    actuarial equivalent  of  the Regular  Benefit.  In addition,  the  Eligible
    Trustee  may elect that the surviving  spouse's periodic payment of benefits
    will be equal  to either 50%  or 100%  of the previous  periodic amount,  an
    election  that, respectively,  increases or decreases  the previous periodic
    amount so that the  resulting payments will be  the actuarial equivalent  of
    the Regular Benefit.
 
(2)   Based on  current levels of  compensation. Amount of  annual benefits also
    varies depending on the Trustee's elections described in Footnote (1) above.
 
    THE BOARD  UNANIMOUSLY RECOMMENDS  THAT  SHAREHOLDERS VOTE  FOR ALL  OF  THE
TRUSTEES NOMINATED FOR ELECTION.
 
       (2) APPROVAL OR DISAPPROVAL OF NEW INVESTMENT MANAGEMENT AGREEMENT
 
BACKGROUND
 
    InterCapital currently serves as investment manager of the Trust pursuant to
an  investment management agreement  entered into by  the Trust and InterCapital
(the "Current Agreement"), and in that capacity provides investment advisory and
certain other services to the  Trust. InterCapital is a wholly-owned  subsidiary
of DWDC. The approval of a new investment management agreement between the Trust
and  InterCapital (the "New  Agreement") is being sought  in connection with the
proposed merger of Morgan  Stanley Group Inc. ("Morgan  Stanley") and DWDC  (the
"Merger").
 
                                       10

INFORMATION CONCERNING MORGAN STANLEY
 
    Morgan Stanley and various of its directly or indirectly owned subsidiaries,
including  Morgan  Stanley  &  Co.  Incorporated  ("Morgan  Stanley  &  Co."), a
registered  broker-dealer   and   investment   adviser,   and   Morgan   Stanley
International,  are  engaged  in  a  wide  range  of  financial  services. Their
principal businesses include securities underwriting, distribution and  trading;
merger,   acquisition,  restructuring  and   other  corporate  finance  advisory
activities; merchant  banking;  stock  brokerage and  research  services;  asset
management; trading of futures, options, foreign exchange, commodities and swaps
(involving  foreign  exchange, commodities,  indices  and interest  rates); real
estate advice, financing and investing; and global custody, securities clearance
services and securities lending.
 
THE MERGER
 
    Pursuant to the terms of the Merger, Morgan Stanley will be merged with  and
into  DWDC  with the  surviving  corporation to  be  named Morgan  Stanley, Dean
Witter, Discover  & Co.  Following the  Merger, InterCapital  will be  a  direct
wholly-owned subsidiary of Morgan Stanley, Dean Witter, Discover & Co.
 
    Under  the terms of  the Merger, each  share of Morgan  Stanley common stock
will be exchanged for  1.65 shares of DWDC  common stock. Following the  Merger,
Morgan Stanley's shareholders will own approximately 45% and DWDC's shareholders
will  own approximately 55% of the outstanding  shares of common stock of Morgan
Stanley, Dean Witter, Discover & Co.
 
    The Merger is expected to be completed in mid-1997.
 
    The Board of Directors of Morgan  Stanley, Dean Witter, Discover & Co.  will
consist  of fourteen members, two  of which will be  Morgan Stanley insiders and
two of which will be DWDC insiders. The remaining ten directors will be  outside
directors,  with Morgan Stanley and  DWDC each designating five  of the ten. The
Chairman and Chief Executive Officer of Morgan Stanley, Dean Witter, Discover  &
Co.  will be Philip J.  Purcell who is the  current Chairman and Chief Executive
Officer of DWDC. The  President and Chief Operating  Officer of Morgan  Stanley,
Dean  Witter, Discover &  Co. will be  the current President  of Morgan Stanley,
John Mack.
 
    The Merger  is  subject to  certain  closing conditions,  including  certain
regulatory  approvals and the  approval of shareholders of  both DWDC and Morgan
Stanley.
 
APPROVAL OF NEW INVESTMENT MANAGEMENT AGREEMENT
 
    In order to assure continuity of investment management services to the Trust
after the Merger, the Board met in person for the purpose of considering whether
it would be in  the best interests  of the Trust and  its Shareholders to  enter
into  a New Agreement between  the Trust and the  Investment Manager which would
become effective upon the later of Shareholder approval of the New Agreement  or
consummation  of the Merger. At its meeting, and for the reasons discussed below
(see "The Board's Consideration"), the Board, including each of the  Independent
Trustees, unanimously approved the New Agreement and recommended its approval by
Shareholders.
 
    THE  TERMS  OF  THE  NEW  AGREEMENT, INCLUDING  FEES  PAYABLE  BY  THE TRUST
THEREUNDER, ARE IDENTICAL,  IN ALL MATERIAL  RESPECTS, TO THOSE  OF THE  CURRENT
AGREEMENT,  EXCEPT FOR THE  DATES OF EFFECTIVENESS AND  EXPIRATION. The terms of
the  Current  Agreement  are  fully  described  under  "The  Current  Investment
Management Agreement" below. If approved by Shareholders, the New Agreement will
continue in effect for an initial term expiring April 30, 1999 and will continue
in  effect from year to  year thereafter if such  continuance is approved by the
Board or by a majority of  the outstanding voting securities (as defined  below)
of  the Trust and, in either event, by the  vote cast in person of a majority of
the Independent Trustees.  In the event  that Shareholders of  the Trust do  not
 
                                       11

approve  a New Agreement,  the Current Agreement  will remain in  effect and the
Board will take such action, if any, as it deems to be in the best interests  of
the  Trust and its  Shareholders, which may  include proposing that Shareholders
approve an agreement in lieu of the New Agreement. In the event that the  Merger
is  not consummated, the Investment Manager will continue to provide services to
the Trust in accordance with the terms of the Current Agreement for such periods
as may be approved at least annually  by the Board, including a majority of  the
Independent Trustees of the Trust.
 
REQUIRED VOTE
 
    The  New Agreement cannot be implemented  unless approved at the Meeting, or
any adjournment thereof, by a majority  of the outstanding voting securities  of
the  Trust. Such a majority means the affirmative vote of the holders of (a) 67%
or more of  the shares  of the  Trust present,  in person  or by  proxy, at  the
Meeting,  if  the holders  of more  than 50%  of the  outstanding shares  are so
present, or (b) more than 50% of the outstanding shares of the Trust,  whichever
is less.
 
    THE  BOARD UNANIMOUSLY RECOMMENDS THAT SHAREHOLDERS VOTE FOR APPROVAL OF THE
NEW INVESTMENT MANAGEMENT AGREEMENT.
 
THE BOARD'S CONSIDERATION
 
    At a special  meeting of the  Committee of the  Independent Trustees of  the
Trust  held on February 20,  1997, at which each  of the Independent Trustees of
the Trust was present, and a meeting of the full Board on February 21, 1997, the
Trustees evaluated the New Agreement (the form of which is attached hereto as an
Exhibit). Prior to and  during the meeting,  the Independent Trustees  requested
and  received all information they deemed  necessary to enable them to determine
whether the  New  Agreement is  in  the best  interests  of the  Trust  and  its
Shareholders.   They  were  assisted  in   their  review  and  deliberations  by
independent legal counsel. In determining whether to approve the New  Agreement,
the  Trustees assessed the implications of the Merger for the Investment Manager
and its ability to continue to provide  services to the Trust of the same  scope
and  quality as are presently provided.  In particular, the Trustees inquired as
to the impact of the Merger  on the Investment Manager's personnel,  management,
facilities  and financial  capabilities and  received assurances  in this regard
from senior management of DWDC and the Investment Manager that the Merger  would
not adversely affect the Investment Manager's ability to fulfill its obligations
under  its  agreement with  the Trust  or to  operate its  business in  a manner
consistent with past practices. In addition, the Trustees considered the effects
of the Investment Manager and Morgan Stanley becoming affiliated persons of each
other. Following  the Merger,  the  1940 Act  will  prohibit or  impose  certain
conditions  on the ability of  the Trust to engage  in certain transactions with
Morgan Stanley and  its affiliates.  For example, absent  exemptive relief,  the
Trust will be prohibited from purchasing securities from Morgan Stanley & Co., a
wholly-owned  broker-dealer  subsidiary of  Morgan  Stanley, in  transactions in
which Morgan Stanley & Co. acts as principal, and the Trust will have to satisfy
certain conditions in order to engage in securities transactions in which Morgan
Stanley & Co.  acts as a  broker or  to purchase securities  in an  underwritten
offering  in  which  Morgan  Stanley  & Co.  acts  as  an  underwriter.  In this
connection, senior  management  of the  Investment  Manager represented  to  the
Trustees  that they do not believe these  prohibitions or conditions will have a
material effect on the management or performance of the Trust.
 
    The Trustees also  considered that the  New Agreement is  identical, in  all
material   respects,  to  the  Current  Agreement   (other  than  the  dates  of
effectiveness and termination).
 
    Based upon the Trustees'  review and the evaluations  of the materials  they
received,  and after consideration  of all factors deemed  relevant to them, the
Trustees, including  all  of  the  Independent  Trustees,  determined  that  the
 
                                       12

New  Agreement  is in  the best  interests  of the  Trust and  its Shareholders.
ACCORDINGLY, THE BOARD, INCLUDING ALL OF THE INDEPENDENT TRUSTEES, APPROVED  THE
NEW AGREEMENT AND VOTED TO RECOMMEND APPROVAL BY SHAREHOLDERS OF THE TRUST.
 
THE CURRENT INVESTMENT MANAGEMENT AGREEMENT
 
    The  Current Agreement provides that the Investment Manager shall obtain and
evaluate such information  and advice  relating to the  economy, securities  and
commodity markets and securities and commodities as it deems necessary or useful
to  discharge  its  duties  under  the  Current  Agreement,  and  that  it shall
continuously supervise the  management of the  assets of the  Trust in a  manner
consistent  with the investment objectives and policies of the Trust and subject
to such other limitations and  directions as the Board  may, from time to  time,
prescribe.
 
    The   Current  Agreement   provides  that   the  Investment   Manager  shall
continuously manage the  assets of  the Trust in  a manner  consistent with  the
Trust's  investment objectives.  The Investment  Manager has  authority to place
orders for the purchase and sale of portfolio securities on behalf of the  Trust
without  prior  approval of  the Trustees.  The  Trustees review  the investment
portfolio at their regular  meetings. In addition,  the Investment Manager  pays
the compensation of the officers of the Trust and provides the Trust with office
space  and  equipment  and  such  clerical  help  and  bookkeeping  services and
telephone service,  heat,  light,  power and  other  utilities.  The  Investment
Manager  also pays for the services of  personnel in connection with the pricing
of the Trust's shares and the preparation of prospectuses, proxy statements  and
reports  required to be filed with  the 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 return  for its investment  services and the  expenses which  the
Investment  Manager  assumes under  the Current  Agreement,  the Trust  pays the
Investment Manager compensation which is computed weekly and payable monthly and
which is determined by applying the following annual rates to the Trust's weekly
net assets: 0.75% of the portion of the average weekly net assets not  exceeding
$250  million; 0.60% of the portion of  average weekly net assets exceeding $250
million and not exceeding $500 million;  0.50% of the portion of average  weekly
net  assets exceeding $500 million and not  exceeding $750 million; 0.40% of the
portion of average weekly net assets exceeding $750 million and not exceeding $1
billion; and 0.30%  of the  portion of average  weekly net  assets exceeding  $1
billion.  This fee is higher than that  paid by most other investment companies.
Pursuant to the Current Agreement, the  Trust accrued to the Investment  Manager
total  compensation of $610,239  during the fiscal year  ended January 31, 1997.
The net assets of the Trust totalled $78,706,900 at January 31, 1997.
 
    Under the Current Agreement, the Trust is obligated to bear all of the costs
and expenses  of  its  operation,  except  those  specifically  assumed  by  the
Investment  Manager, including, without limitation:  charges and expenses of any
registrar, custodian or depository appointed by the Trust for the safekeeping of
its cash, portfolio securities or commodities and other property, and any  stock
transfer   or  dividend  agent  or  agents  appointed  by  the  Trust;  brokers'
commissions chargeable  to the  Trust in  connection with  portfolio  securities
transactions  to which the Trust is a  party; all taxes, including securities or
commodities issuance  and transfer  taxes,  and fees  payable  by the  Trust  to
Federal,  state or other governmental agencies;  costs and expenses of engraving
or printing  certificates  representing  shares  of the  Trust;  all  costs  and
expenses  in connection with registration and maintenance of registration of the
Trust and of its shares with the Securities and Exchange Commission and  various
states  and  other  jurisdictions  (including filing  fees  and  legal  fees and
disbursements of  counsel) and  the  costs and  expense of  preparing,  printing
(including  typesetting) and  distributing prospectuses  for such  purposes; all
expenses of Shareholders' and Trustees' meetings and of preparing, printing  and
mailing  proxy statements and reports to  Shareholders; fees and travel expenses
of Trustees or members of any advisory board or committee who are not  employees
of  the Investment Manager or any corporate affiliate of the Investment Manager;
all expenses incident
 
                                       13

to the payment of any dividend or distribution program; charges and expenses  of
any  outside pricing services; charges and  expenses of legal counsel, including
counsel to the Independent Trustees of the Trust, and independent accountants in
connection with any matter relating to the Trust (not including compensation  or
expenses  of attorneys employed  by the Investment  Manager); membership dues of
industry associations; interest payable on  Trust borrowings; fees and  expenses
incident  to the listing of  the Trust's shares on  any stock exchange; postage;
insurance premiums on property or personnel (including officers and Trustees) of
the Trust which inure to its benefit; extraordinary expenses (including, but not
limited to, legal claims, liabilities, litigation costs and any  indemnification
related  thereto); and  all other  charges and  costs of  the Trust's operations
unless otherwise explicitly provided in the Current Agreement.
 
    The Current Agreement  was initially approved  by the Board  on October  30,
1992,  and by  the Shareholders  at a  Special Meeting  of Shareholders  held on
January 13, 1993. The Current Agreement was last approved by the Shareholders as
a routine matter at their Annual Meeting held on June 27, 1996.
 
    The Current Agreement had an initial term ending April 30, 1994 and provides
that, after the initial period of effectiveness, it will continue in effect from
year to year thereafter provided such continuance is approved at least  annually
by  vote  of  a majority,  as  defined in  the  Act, of  the  outstanding voting
securities of the Trust or by the  Trustees of the Trust, and, in either  event,
by  the vote cast in person by a majority of the Trustees who are not parties to
the Current Agreement or "interested persons"  of any such party (as defined  in
the  1940 Act) at a  meeting called for the purpose  of voting on such approval.
The Current  Agreement's  most recent  continuation  until April  30,  1997  was
approved  by the Trustees, including a majority of the Independent Trustees at a
Meeting of  the Trustees  held on  April 17,  1996, called  for the  purpose  of
approving the Current Agreement.
 
    The  Current Agreement also provides that it may be terminated at a any time
by the Investment Manager, the Trustees of the Trust or by a vote of a  majority
of  the outstanding voting securities of the Trust, in each instance without the
payment of any penalty, on thirty days' notice and will automatically  terminate
upon any assignment.
 
    The  administrative  services called  for  under the  Current  Agreement are
performed by  DWSC, a  wholly-owned subsidiary  of InterCapital,  pursuant to  a
Services Agreement between InterCapital and DWSC.
 
THE INVESTMENT MANAGER
 
    Dean   Witter  InterCapital   Inc.  is   the  Trust's   investment  manager.
InterCapital maintains its offices at Two World Trade Center, New York, New York
10048. InterCapital, which  was incorporated  in July, 1992,  is a  wholly-owned
subsidiary of DWDC, a balanced financial services organization providing a broad
range of nationally marketed credit and investment products.
 
    The  Principal Executive  Officer and  Directors of  InterCapital, and their
principal occupations, are:
 
    Philip J. Purcell, Chairman  of the Board of  Directors and Chief  Executive
Officer  of DWDC  and DWR and  Director of InterCapital,  DWSC and Distributors;
Richard M.  DeMartini, President  and  Chief Operating  Officer of  Dean  Witter
Capital,  Executive Vice  President of DWDC  and Director  of DWR, Distributors,
InterCapital, DWSC and  DWTC; James  F. Higgins, President  and Chief  Operating
Officer  of Dean Witter Financial, Executive Vice President of DWDC and Director
of DWR,  Distributors,  InterCapital, DWSC  and  DWTC; Charles  A.  Fiumefreddo,
Executive  Vice  President  and  Director  of  DWR,  Chairman  of  the  Board of
Directors, Chief  Executive  Officer  and Director  of  InterCapital,  DWSC  and
Distributors  and  Chairman of  the  Board of  Directors  and Director  of DWTC;
Christine A. Edwards, Executive Vice President, Secretary and General Counsel of
DWDC, Executive Vice President, Secretary, General Counsel and Director of  DWR,
Executive Vice President,
 
                                       14

Secretary,  Chief Legal  Officer and  Director of  Distributors and  Director of
InterCapital and DWSC;  and Thomas  C. Schneider, Executive  Vice President  and
Chief  Financial Officer of  DWDC and Executive  Vice President, Chief Financial
Officer and Director of DWR, Distributors, InterCapital and DWSC.
 
    The business address of the foregoing Directors and Executive Officer is Two
World Trade Center, New York, New York 10048. DWDC has its offices at Two  World
Trade Center, New York, New York 10048.
 
    InterCapital  and  its  wholly-owned  subsidiary,  DWSC,  serve  in  various
investment management,  advisory, management  and administrative  capacities  to
investment  companies and pension  plans and other  institutional and individual
investors. The Appendix  lists the investment  companies for which  InterCapital
provides  investment management or  investment advisory services  and which have
similar investment objectives  to that  of the Trust,  and sets  forth the  fees
payable by such companies, including the Trust, and their net assets as of March
12, 1997.
 
    During  the fiscal year ended  January 31, 1997, the  Trust accrued to DWTC,
the Trust's Transfer Agent and an affiliate of the Investment Manager,  transfer
agency fees of $43,845.
 
AFFILIATED BROKER
 
    Because DWR and InterCapital are under the common control of DWDC, DWR is an
affiliated  broker of InterCapital. For the  fiscal year ended January 31, 1997,
the Trust paid no brokerage commissions to DWR.
 
     (3) RATIFICATION OR REJECTION OF SELECTION OF INDEPENDENT ACCOUNTANTS
 
    The Trustees have unanimously selected the  firm of Price Waterhouse LLP  as
the Trust's independent accountants for the fiscal year ending January 31, 1998.
Price  Waterhouse LLP has  been the independent accountants  for the Trust since
its inception, and has no direct or indirect financial interest in the Trust.
 
    A representative of Price  Waterhouse LLP is expected  to be present at  the
Meeting  and will be available to make a statement and to respond to appropriate
questions of Shareholders.
 
    The affirmative vote of the holders of a majority of the shares  represented
and  entitled to vote at the Annual  Meeting is required for ratification of the
selection of Price Waterhouse LLP as the independent accountants for the Trust.
 
    THE  TRUSTEES  UNANIMOUSLY  RECOMMEND  THAT  THE  SHAREHOLDERS  RATIFY   THE
SELECTION OF PRICE WATERHOUSE LLP AS THE INDEPENDENT ACCOUNTANTS FOR THE TRUST.
 
                             ADDITIONAL INFORMATION
 
    In  the event  that the  necessary quorum to  transact business  or the vote
required to approve or reject any proposal  is not obtained at the Meeting,  the
persons named as proxies may propose one or more adjournments of the Meeting for
a total of not more than 60 days in the aggregate to permit further solicitation
of  proxies.  Any such  adjournment  will require  the  affirmative vote  of the
holders of a majority of the Trust's shares present in person or by proxy at the
Meeting. The persons  named as proxies  will vote in  favor of such  adjournment
those  proxies which they are  entitled to vote in favor  of Proposal 2 and will
vote against any  such adjournment those  proxies required to  be voted  against
that proposal.
 
    Abstentions  and, if applicable, broker "non-votes"  will not count as votes
in favor of any of the proposals,  and broker "non-votes" will not be deemed  to
be   present   at   the  Meeting   for   purposes  of   determining   whether  a
 
                                       15

particular proposal to be voted upon  has been approved. Broker "non-votes"  are
shares held in street name for which the broker indicates that instructions have
not  been received from the beneficial owners  or other persons entitled to vote
and for which the broker does not have discretionary voting authority.
 
                             SHAREHOLDERS PROPOSALS
 
    Proposals of security holders  intended to be presented  at the next  Annual
Meeting  of Shareholders must be received no later  than [December   , 1997] for
inclusion in the  proxy statement  for that meeting.  The mere  submission of  a
proposal  does  not  guarantee  its  inclusion in  the  proxy  materials  or its
presentation at the  meeting. Certain  rules under the  federal securities  laws
must be met.
 
                            REPORTS TO SHAREHOLDERS
 
    THE  TRUST'S ANNUAL REPORT, FOR THE FISCAL  YEAR ENDED JANUARY 31, 1996, AND
ITS MOST  RECENT SEMI-ANNUAL  REPORT  SUCCEEDING THE  ANNUAL REPORT,  HAVE  BEEN
PREVIOUSLY  SENT TO SHAREHOLDERS  AND ARE AVAILABLE  WITHOUT CHARGE UPON REQUEST
FROM ADRIENNE  RYAN-PINTO AT  DEAN WITTER  TRUST COMPANY,  HARBORSIDE  FINANCIAL
CENTER,  PLAZA  TWO, JERSEY  CITY, NEW  JERSEY 07311  (TELEPHONE 1-800-869-NEWS)
(TOLL-FREE).
 
                          INTEREST OF CERTAIN PERSONS
 
    DWDC, InterCapital, DWR,  DWSC and  certain of  their respective  Directors,
Officers,  and employees, including persons who  are Trustees or Officers of the
Trust, may be deemed to have an  interest in certain of the proposals  described
in  this Proxy Statement to the extent  that certain of such companies and their
affiliates have contractual and other arrangements, described elsewhere in  this
Proxy  Statement, pursuant to which they are paid fees by the Trust, and certain
of those individuals  are compensated  for performing services  relating to  the
Trust  and may also own  shares of DWDC. Such companies  and persons may thus be
deemed to derive benefits from the approvals by Shareholders of such proposals.
 
                                 OTHER BUSINESS
 
    The management of the Trust knows of no other matters which may be presented
at the Meeting. However, if any matters  not now known properly come before  the
Meeting, it is the intention of the persons named in the enclosed form of proxy,
or  their substitutes, to vote all shares that  they are entitled to vote on any
such matter, utilizing such proxy in accordance with their best judgment on such
matters.
 
                        By Order of the Board of Trustees
                                   BARRY FINK
                                    SECRETARY
 
                                       16

                                                                        APPENDIX
 
    InterCapital  serves  as  investment  manager to  the  Trust  and  the other
investment companies listed  below which have  similar investment objectives  to
those  of the Trust. Set forth  below is a chart showing  the net assets of each
such investment company as of March 12, 1997 and the investment management  fees
rate(s) applicable to such investment company.
 


                                                                                    NET ASSETS         CURRENT INVESTMENT
                                                                                  AS OF 03/12/97     MANAGEMENT FEE RATE(S)
                                                                                  --------------  -----------------------------
                                                                                         
       1.  DEAN WITTER HIGH YIELD SECURITIES INC.*..............................  $               0.50% on assets up to $500
                                                                                                  million, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $3 billion
       2.  DEAN WITTER U.S. GOVERNMENT SECURITIES TRUST*........................  $               0.50% on assets up to $1
                                                                                                  billion, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $12.5 billion
       3.  DEAN WITTER CONVERTIBLE SECURITIES TRUST*............................  $               0.60% on assets up to $750
                                                                                                  million, scaled down at
                                                                                                  various asset levels to
                                                                                                  0.425% on assets over $3
                                                                                                  billion
       4.  DEAN WITTER FEDERAL SECURITIES TRUST*................................  $               0.55% on assets up to $1
                                                                                                  billion, scaled down at
                                                                                                  various asset levels to 0.35%
                                                                                                  on assets over $12.5 billion
       5.  INTERCAPITAL INCOME SECURITIES INC.**................................  $               0.50%
       6.  HIGH INCOME ADVANTAGE TRUST**........................................  $               0.75% on assets up to $250
                                                                                                  million, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $1 billion
       7.  HIGH INCOME ADVANTAGE TRUST II**.....................................  $               0.75% on assets up to $250
                                                                                                  million, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $1 billion
       8.  HIGH INCOME ADVANTAGE TRUST III**....................................  $               0.75% on assets up to $250
                                                                                                  million, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $1 billion
       9.  DEAN WITTER INTERMEDIATE INCOME SECURITIES*..........................  $               0.60% on assets up to $500
                                                                                                  million, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $1 billion
      10.  DEAN WITTER WORLD WIDE INCOME TRUST*.................................  $               0.75% on assets up to $250
                                                                                                  million, scaled down at
                                                                                                  various asset levels to 0.30%
                                                                                                  on assets over $1 billion
      11.  DEAN WITTER GOVERNMENT INCOME TRUST**................................  $               0.60%
      12.  DEAN WITTER GLOBAL SHORT-TERM INCOME FUND INC.*......................  $               0.55% on assets up to $500
                                                                                                  million and 0.50% on assets
                                                                                                  over $500 million
      13.  DEAN WITTER PREMIER INCOME TRUST*....................................  $               0.50% (of which 40% is paid
                                                                                                  to a Sub-Adviser)
      14.  DEAN WITTER SHORT-TERM U.S. TREASURY TRUST*..........................  $               0.35%
      15.  DEAN WITTER DIVERSIFIED INCOME TRUST*................................  $               0.40%

 
                                      A-1



                                                                                    NET ASSETS         CURRENT INVESTMENT
                                                                                  AS OF 03/12/97     MANAGEMENT FEE RATE(S)
                                                                                  --------------  -----------------------------
                                                                                         
      16.  DEAN WITTER SHORT-TERM BOND FUND*....................................  $               0.70%(1)
      17.  DEAN WITTER HIGH INCOME SECURITIES*..................................  $               0.50% on assets up to $500
                                                                                                  million and 0.425% on assets
                                                                                                  over $500 million.
      18.  PRIME INCOME TRUST**.................................................  $               0.90% on assets up to $500
                                                                                                  million and 0.85% on assets
                                                                                                  over $500 million
      19.  DEAN WITTER BALANCED INCOME FUND*....................................  $               0.60%
      20.  DEAN WITTER RETIREMENT SERIES:*
           (a) U.S. GOVERNMENT SECURITIES SERIES................................  $               0.65% (2)
           (b) INTERMEDIATE INCOME SECURITIES SERIES............................  $               0.65% (2)
      21.  DEAN WITTER VARIABLE INVESTMENT SERIES:***
           (a) QUALITY INCOME PLUS PORTFOLIO....................................  $               0.50% on assets up to $500
                                                                                                  million and 0.45% on assets
                                                                                                  over $500 million
           (b) HIGH YIELD PORTFOLIO.............................................  $               0.50%
      22.  DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES:***
           (a) DIVERSIFIED INCOME PORTFOLIO.....................................  $               0.40%
           (b)NORTH AMERICAN GOVERNMENT SECURITIES PORTFOLIO....................  $               0.65% (of which 40% is paid
                                                                                                  to a Sub-Adviser)
      23.  DEAN WITTER INTERMEDIATE TERM U.S. TREASURY TRUST*...................  $               0.35%(3)

 
- ---------------
 
  * Open-end investment company.
 
 ** Closed-end investment company.
 
***  Open-end investment  company offered  only to  life insurance  companies in
    connection with variable annuity and/or variable life insurance contracts.
 
(1) InterCapital has undertaken, from January 1, 1997 through April 30, 1997, to
    assume all operating expenses  of Dean Witter  Short-Term Bond Fund  (except
    for  any brokerage fees) and  to waive the compensation  provided for in its
    investment management agreement with that company.
 
(2) InterCapital has undertaken, until July 31, 1997, to continue to assume  all
    operating  expenses of the  Series of Dean  Witter Retirement Series (except
    for brokerage fees and  a portion of organizational  expenses) and to  waive
    the  compensation  provided for  each  Series in  its  investment management
    agreement with that  company in respect  of each Series  to the extent  that
    such  expenses and  compensation on an  annualized basis exceed  1.0% of the
    average daily net assets of the pertinent Series.
 
(3) InterCapital has undertaken to assume all operating expenses of Dean  Witter
    Intermediate  Term  U.S.  Treasury  Trust (except  for  any  12b-1  fees and
    brokerage expenses)  and  to waive  the  compensation provided  for  in  its
    investment  management agreement with  that company until  such time as that
    company has $50  million of net  assets or until  March 31, 1997,  whichever
    occurs first.
 
                                      A-2

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

          3.
       The Fund will, from time to time, furnish or otherwise make available  to
       the Investment Manager such financial reports, proxy statements and other
information  relating to the business and affairs  of the Fund as the Investment
Manager may reasonably require in order to discharge its duties and  obligations
hereunder.
 
       The4.Investment Manager shall  bear the cost  of rendering the investment
       management and  supervisory services  to be  performed by  it under  this
Agreement,  and shall, at its own expense,  pay the compensation of the officers
and employees, if any,  of the Fund, and  provide such office space,  facilities
and  equipment and such clerical help and bookkeeping services as the Fund shall
reasonably require in the conduct of its business. The Investment Manager  shall
also  bear the cost of telephone service, heat, light, power and other utilities
provided to the Fund.
 
          5.
       The Fund assumes and shall pay or cause to be paid all other expenses  of
       the  Fund, including without limitation: the  charges and expenses of any
registrar, any custodian or depository appointed by the Fund for the safekeeping
of its cash,  portfolio securities or  commodities and other  property, and  any
stock  transfer  or dividend  agent or  agents appointed  by the  Fund; brokers'
commissions chargeable to the Fund in connection with portfolio transactions  to
which  the  Fund is  a  party; all  taxes,  including securities  or commodities
issuance and transfer taxes, and fees payable  by the Fund to federal, state  or
other  governmental  agencies; the  cost and  expense  of engraving  or printing
certificates representing  shares  of  the  Fund;  all  costs  and  expenses  in
connection with the registration and maintenance of registration of the Fund and
its  shares with the  Securities and Exchange Commission  and various states and
other jurisdictions (including filing fees  and legal fees and disbursements  of
counsel   and  the  costs  and  expenses  of  preparation,  printing  (including
typesetting) and distributing prospectuses for  such purposes); all expenses  of
shareholders'  and  Trustees' meetings  and of  preparing, printing  and mailing
proxy statements  and  reports to  shareholders;  fees and  travel  expenses  of
Trustees  or members of any advisory board or committee who are not employees of
the Investment Manager or any corporate affiliate of the Investment Manager; all
expenses incident  to  the payment  of  any dividend  or  distribution  program;
charges  and expenses  of any  outside service  used for  pricing of  the Fund's
shares; charges and expenses of legal counsel, including counsel to the Trustees
of the Fund who are not interested persons  (as defined in the Act) of the  Fund
or  the Investment Manager,  and of independent  accountants, in connection with
any matter  relating to  the  Fund; membership  dues of  industry  associations;
interest  payable on Fund borrowings; fees  and expenses incident to the listing
of the  Fund's shares  on any  stock exchange;  postage; insurance  premiums  on
property  or personnel (including officers and Trustees) of the Fund which inure
to its benefit;  extraordinary expenses  (including, but not  limited to,  legal
claims  and  liabilities and  litigation costs  and any  indemnification related
thereto); and  all  other charges  and  costs  of the  Fund's  operation  unless
otherwise explicitly provided herein.
 
       For6.the  services  to be  rendered,  the facilities  furnished,  and the
       expenses assumed by  the Investment Manager,  the Fund shall  pay to  the
Investment  Manager monthly  compensation determined  by applying  the following
annual rates to the Fund's  average weekly net assets:  0.75% of the portion  of
the  average weekly net assets not exceeding  $250 million; 0.60% of the portion
of average  weekly net  assets exceeding  $250 million  and not  exceeding  $500
million;  0.50%  of the  portion  of average  weekly  net assets  exceeding $500
million and not exceeding $750 million;  0.40% of the portion of average  weekly
net assets exceeding $750 million and not exceeding $1 billion; and 0.30% of the
portion of average weekly net assets exceeding $1 billion. Except as hereinafter
set  forth, compensation  under this Agreement  shall be  calculated and accrued
weekly and paid monthly by applying the  annual rates to the average weekly  net
assets  of the Fund determined as of the  close of the last business day of each
week. At the request of the Investment Manager, compensation hereunder shall  be
calculated  and accrued at  more frequent intervals in  a manner consistent with
the calculation of fees on a weekly
 
                                      EX-2

basis. If this  Agreement becomes  effective subsequent to  the first  day of  a
month  or shall terminate before the last  day of a month, compensation for that
part of the  month this Agreement  is in effect  shall be prorated  in a  manner
consistent with the calculation of the fees as set forth above.
 
       The7.Investment Manager will use its  best efforts in the supervision and
       management of the investment activities of  the Fund, but in the  absence
of willful misfeasance, bad faith, gross negligence or reckless disregard of its
obligations hereunder, the Investment Manager shall not be liable to the Fund or
any  of its investors for any error of judgment or mistake of law or for any act
or omission by the Investment Manager or for any losses sustained by the Fund or
its investors.
 
          8.
       Nothing contained in this Agreement shall prevent the Investment  Manager
       or  any  affiliated  person  of the  Investment  Manager  from  acting as
investment adviser or  manager for  any other  person, firm  or corporation  and
shall  not  in any  way  bind or  restrict the  Investment  Manager or  any such
affiliated person from buying, selling or trading any securities or  commodities
for their own accounts or for the account of others for whom they may be acting.
Nothing  in this  Agreement shall  limit or restrict  the right  of any Trustee,
officer or employee of the Investment Manager to engage in any other business or
to devote his  or her  time and  attention in part  to the  management or  other
aspects of any other business whether of a similar or dissimilar nature.
 
          9.
       This  Agreement shall remain in effect until April 30, 1999 and from year
       to year  thereafter  provided  such  continuance  is  approved  at  least
annually  by the vote  of holders of a  majority, as defined in  the Act, of the
outstanding voting securities of  the Fund or  by the Board  of Trustees of  the
Fund;  provided that in either event  such continuance is also approved annually
by the vote of  a majority of the  Trustees of the Fund  who are not parties  to
this  Agreement or  "interested persons"  (as defined  in the  Act) of  any such
party, which vote must be cast in person at a meeting called for the purpose  of
voting  on such approval; provided, however, that  (a) the Fund may, at any time
and without the  payment of any  penalty, terminate this  Agreement upon  thirty
days'  written notice to the Investment Manager,  either by majority vote of the
Trustees of the  Fund or by  the vote of  a majority of  the outstanding  voting
securities  of the Fund;  (b) this Agreement shall  immediately terminate in the
event of  its assignment  (to  the extent  required by  the  Act and  the  rules
thereunder)  unless  such  automatic  terminations  shall  be  prevented  by  an
exemptive  order  of  the  Securities  and  Exchange  Commission;  and  (c)  the
Investment  Manager may terminate  this Agreement without  payment of penalty on
thirty days' written notice to the  Fund. Any notice under this Agreement  shall
be  given in writing, addressed and delivered, or mailed post-paid, to the other
party at the principal office of such party.
 
         10.
       This Agreement may be amended by the parties without the vote or  consent
       of  the shareholders of the Fund to supply any omission, to cure, correct
or supplement any ambiguous, defective  or inconsistent provision hereof, or  if
they  deem  it  necessary  to  conform this  Agreement  to  the  requirements of
applicable federal laws or regulations, but neither the Fund nor the  Investment
Manager shall be liable for failing to do so.
 
         11.
       This  Agreement shall  be construed  in accordance  with the  laws of the
       State of New York and the applicable provisions of the Act. To the extent
the applicable law of the  State of New York, or  any of the provisions  herein,
conflicts with the applicable provisions of the Act, the latter shall control.
 
         12.
       The  Declaration of Trust  establishing High Income  Advantage Trust III,
       dated November 23, 1988,  a copy of which,  together with all  amendments
thereto  (the "Declaration"), is on  file in the office  of the Secretary of the
Commonwealth of  Massachusetts, provides  that the  name High  Income  Advantage
Trust III refers to the Trustees under the Declaration collectively as Trustees,
but  not as  individuals or  personally; and  no Trustee,  shareholder, officer,
employee or  agent of  High Income  Advantage Trust  III shall  be held  to  any
personal  liability, nor shall resort  be had to their  private property for the
satisfaction of any  obligation or claim  or otherwise, in  connection with  the
affairs of said High Income Advantage Trust III, but the Trust Estate only shall
be liable.
 
                                      EX-3

    IN  WITNESS WHEREOF,  the parties  hereto have  executed and  delivered this
Agreement on the day and year first above written in New York, New York.
 

                                               
                                                  HIGH INCOME ADVANTAGE TRUST III
 
                                                  By
                                                  ................................................
 
Attest:
 
 ...............................................
 
                                                  DEAN WITTER INTERCAPITAL INC.
 
                                                  By
                                                  ................................................
 
Attest:
 
 ...............................................

 
                                      EX-4


                           HIGH INCOME ADVANTAGE TRUST III 

                                        PROXY 

              THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES


The undersigned hereby appoints Robert M. Scanlan, Barry Fink, and Joseph J.
McAlinden, or any of them, proxies, each with the power of substitution, to vote
on behalf of the undersigned at the Annual Meeting of Shareholders of High
Income Advantage Trust III on May 1, 1997, at 10:00 a.m., New York City time,
and at any adjournment thereof, on the proposals set forth in the Notice of
Meeting dated _________ , 1997 as follows:




                             (CONTINUED ON REVERSE SIDE)

THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN BY
THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY WILL BE VOTED
``FOR'' THE TRUSTEES AND THE PROPOSALS SET FORTH ON THE REVERSE HEREOF AND AS
RECOMMENDED BY THE BOARD OF TRUSTEES.

        IMPORTANT --- THIS PROXY MUST BE SIGNED AND DATED ON THE REVERSE SIDE.


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

/X/ PLEASE MARK VOTES AS IN THE EXAMPLE USING BLACK OR BLUE INK


                                                                  FOR ALL
                                                  FOR   WITHHOLD  EXCEPT

1.  Election of four (4) Trustees:                / /     / /      / /
    Michael Bozic, Charles A. Fiumefreddo

    If you wish to withhold authority for any particular nominee, mark the 
    ``For All Except'' Box and strike a line through the nominee's name.

                                                  FOR   AGAINST   ABSTAIN

2.  Approval of New Investment Management         / /     / /      / /
    Agreement with Dean Witter InterCapital 
    Inc. in connection with proposed merger.

                                                  FOR   AGAINST   ABSTAIN

3.  Ratification of appointment of Price          / /     / /      / /
    Waterhouse LLP as independent accoun-
    tants.




  Please make sure to sign and date 
  this Proxy using black or blue ink.             Date________________
- --------------------------------------   --------------------------------------




- --------------------------------------   --------------------------------------
   Shareholder sign in the box above    Co-Owner (if any) sign in the box above


- --------------------------------------------------------------------------------
                             PLEASE DETACH AT PERFORATION



                           HIGH INCOME ADVANTAGE TRUST III


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

                                      IMPORTANT

                     PLEASE SEND IN YOUR PROXY............TODAY!



YOU ARE URGED TO DATE AND SIGN THE ATTACHED PROXY AND RETURN IT PROMPTLY IN THE
ENCLOSED ENVELOPE. THIS WILL HELP SAVE THE EXPENSE OF FOLLOW-UP LETTERS TO
SHAREHOLDERS WHO HAVE NOT RESPONDED.

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