Document:

EXHIBIT 10.2

                                    AMENDMENT

                                        TO

                              MANAGEMENT AGREEMENT

        WHEREAS,  DEMETER MANAGEMENT  CORPORATION,  a Delaware  corporation (the
"General  Partner")  on behalf of DEAN  WITTER  CORNERSTONE  FUND II, a New York
limited partnership (the "Partnership"), and NORTHFIELD TRADING L.P., a Delaware
limited partnership (the "Trading Manager"), have agreed to amend the Management
Agreement,  dated as of April 16, 1997 (the "Management  Agreement"),  among the
Partnership,  the  General  Partner,  and the  Trading  Manager,  to change  the
management fee payable to the Trading Manager.

        WHEREAS,  all provisions contained in the Management Agreement remain in
full force and effect and are modified  only to the extent  necessary to provide
for the amendment set forth below.

        NOW, THEREFORE, the parties hereto hereby amend the Management Agreement
as follows:

        1.  The  monthly  management  fee rate of 1/3 of 1% (a 4%  annual  rate)
referred to in Section 7(a)(i) of the Management  Agreement is hereby changed to
7/24 of 1% (a 3.5% annual rate).

        2. The foregoing change shall take effect as of December 1, 2000.

<PAGE>

        IN WITNESS WHEREOF,  this Amendment to the Management Agreement has been
executed  for and on behalf of the  undersigned  as of the 30th day of November,
2000.

                                          DEAN WITTER CORNERSTONE FUND II

                                          By:   Demeter Management Corporation,
                                                General Partner

                                          By:   /s/Robert E. Murray
                                             -----------------------------------
                                                Name:  Robert E. Murray
                                                Title:  President

                                          DEMETER MANAGEMENT CORPORATION

                                          By:   /s/Robert E. Murray
                                             -----------------------------------
                                                Name:  Robert E. Murray
                                                Title:  President

                                          NORTHFIELD TRADING L.P.

                                          By:   /s/Douglas Bry
                                             ---------------------------------
                                                Name:  Douglas Bry
                                                Title:  PresidentEXHIBIT 10.1

                                    AMENDMENT

                                        TO

                              MANAGEMENT AGREEMENT

        WHEREAS,  DEMETER MANAGEMENT  CORPORATION,  a Delaware  corporation (the
"General  Partner")  on behalf of DEAN WITTER  CORNERSTONE  FUND III, a New York
limited partnership (the "Partnership"),  and WELTON INVESTMENT  CORPORATION,  a
Delaware  corporation  (formerly,  Welton  Investment  System  Corporation) (the
"Trading Manager"),  have agreed to amend the Management Agreement,  dated as of
July 1, 1996 (the "Management  Agreement"),  among the Partnership,  the General
Partner,  and the Trading  Manager,  to change the management fee payable to the
Trading Manager.

        WHEREAS,  all provisions contained in the Management Agreement remain in
full force and effect and are modified  only to the extent  necessary to provide
for the amendment set forth below.

        NOW, THEREFORE, the parties hereto hereby amend the Management Agreement
as follows:

        1.  The  monthly  management  fee rate of 1/3 of 1% (a 4%  annual  rate)
referred to in Section 7(a)(i) of the Management  Agreement is hereby changed to
7/24 of 1% (a 3.5% annual rate).

        2. The foregoing change shall take effect as of December 1, 2000.

<PAGE>

        IN WITNESS WHEREOF,  this Amendment to the Management Agreement has been
executed  for and on behalf of the  undersigned  as of the 30th day of November,
2000.

                                           DEAN WITTER CORNERSTONE FUND III

                                           By:   Demeter Management Corporation,
                                                 General Partner

                                           By:   /s/Robert E. Murray
                                              ----------------------------------
                                              Name:  Robert E. Murray
                                              Title:  President

                                           DEMETER MANAGEMENT CORPORATION

                                           By:   /s/Robert E. Murray
                                              ----------------------------------
                                              Name:  Robert E. Murray
                                              Title:  President

                                           WELTON INVESTMENT CORPORATION

                                           By:   /s/D. Nowlin
                                              ---------------------------------
                                              Name:  David Nowlin
                                              Title:  Vice President,
                                                      Administrative OperationsEXHIBIT 10.2

                                    AMENDMENT

                                        TO

                              MANAGEMENT AGREEMENT

        WHEREAS,  DEMETER MANAGEMENT  CORPORATION,  a Delaware  corporation (the
"General  Partner")  on behalf of DEAN WITTER  CORNERSTONE  FUND III, a New York
limited partnership (the "Partnership"), and SUNRISE CAPITAL MANAGEMENT, INC., a
California  corporation,  (formerly,  Sunrise  Commodities,  Inc.) (the "Trading
Manager"),  have agreed to amend the Management Agreement,  dated as of November
15,  1983 (the  "Management  Agreement"),  among the  Partnership,  the  General
Partner,  and the Trading  Manager,  to change the management fee payable to the
Trading Manager.

        WHEREAS,  all provisions contained in the Management Agreement remain in
full force and effect and are modified  only to the extent  necessary to provide
for the amendment set forth below.

        NOW, THEREFORE, the parties hereto hereby amend the Management Agreement
as follows:

        1.  The  monthly  management  fee rate of 1/3 of 1% (a 4%  annual  rate)
referred to in Section 7(a)(i) of the Management  Agreement is hereby changed to
7/24 of 1% (a 3.5% annual rate).

        2. The foregoing change shall take effect as of December 1, 2000.

<PAGE>

        IN WITNESS WHEREOF,  this Amendment to the Management Agreement has been
executed  for and on behalf of the  undersigned  as of the 30th day of November,
2000.

                                          DEAN WITTER CORNERSTONE FUND III

                                          By:   Demeter Management Corporation,
                                                General Partner

                                          By:   /s/Robert E. Murray
                                             -----------------------------------
                                                Name:  Robert E. Murray
                                                Title:  President

                                          DEMETER MANAGEMENT CORPORATION

                                          By:   /s/Robert E. Murray
                                             -----------------------------------
                                                Name:  Robert E. Murray
                                                Title:  President

                                          SUNRISE CAPITAL MANAGEMENT, INC.

                                          By:   /s/Martin P. Klitzner
                                             -----------------------------------
                                                Name:  Martin P. Klitzner
                                                Title:  PresidentEXHIBIT 10.1

                                    AMENDMENT

                                        TO

                              MANAGEMENT AGREEMENT

        WHEREAS,  DEMETER MANAGEMENT  CORPORATION,  a Delaware  corporation (the
"General  Partner")  on behalf of DEAN  WITTER  CORNERSTONE  FUND IV, a New York
limited partnership (the  "Partnership"),  and JOHN W. HENRY & COMPANY,  INC., a
Florida corporation (the "Trading Manager"), have agreed to amend the Management
Agreement,  dated as of January 20, 1987,  as amended by Amendment to Management
Agreement,  dated as of February 1, 1998 (together, the "Management Agreement"),
among the Partnership,  the General Partner,  and the Trading Manager, to change
the management fee payable to the Trading Manager.

        WHEREAS,  all provisions contained in the Management Agreement remain in
full force and effect and are modified  only to the extent  necessary to provide
for the amendment set forth below.

        NOW, THEREFORE, the parties hereto hereby amend the Management Agreement
as follows:

        1.  The  monthly  management  fee rate of 1/3 of 1% (a 4%  annual  rate)
referred to in Section 7(a)(i) of the Management  Agreement is hereby changed to
7/24 of 1% (a 3.5% annual rate).

        2. The foregoing change shall take effect as of December 1, 2000.

<PAGE>

        IN WITNESS WHEREOF,  this Amendment to the Management Agreement has been
executed  for and on behalf of the  undersigned  as of the 30th day of November,
2000.

                                          DEAN WITTER CORNERSTONE FUND IV

                                          By:   Demeter Management Corporation,
                                                General Partner

                                          By:   /s/Robert E. Murray
                                             -----------------------------------
                                                Name:  Robert E. Murray
                                                Title:  President

                                          DEMETER MANAGEMENT CORPORATION

                                          By:   /s/Robert E. Murray
                                             -----------------------------------
                                                Name:  Robert E. Murray
                                                Title:  President

                                          JOHN W. HENRY & COMPANY, INC

                                          By:   /s/V. Sedlacek
                                             -----------------------------------
                                                Name:  Verne Sedlacek
                                                Title:  President

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