<Page>

     CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES OXLEY ACT OF 2002


This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, 18 U.S.C. Section 1350, and accompanies the report on Form N-CSR for
the period ended October 31, 2003 of the JPMorgan Fleming Asia Equity Fund,
JPMorgan Fleming European Fund, JPMorgan Fleming International Growth Fund,
JPMorgan Fleming Japan Fund and JPMorgan Fleming Tax Aware International
Opportunities Fund, each a series of J.P. Morgan Mutual Fund Group (the
"Registrant").


I, George C.W. Gatch, certify that:


1. The Form N-CSR fully complies with the requirements of Section 13(a) or 15(d)
   of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)), as
   applicable; and

2. The information contained in the Form N-CSR fairly presents, in all material
   respects, the financial condition and results of operations of the JPMorgan
   Fleming Asia Equity Fund, JPMorgan Fleming European Fund, JPMorgan Fleming
   International Growth Fund, JPMorgan Fleming Japan Fund and JPMorgan Fleming
   Tax Aware International Opportunities Fund, each a series of the Registrant.


/s/ George C.W. Gatch
- ---------------------
George C.W. Gatch
President

December 29, 2003
- -----------------
Date

This certificate is furnished pursuant to the requirements of Form N-CSR and
shall not be deemed "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934, or otherwise subject to the liability of that section, and
shall not be deemed to be incorporated by reference into any filing under the
Securities Act of 1933 or the Exchange Act of 1934.

<Page>

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES OXLEY ACT OF 2002


This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, 18 U.S.C. Section 1350, and accompanies the report on Form N-CSR for
the period ended October 31, 2003 of the JPMorgan Fleming Asia Equity Fund,
JPMorgan Fleming European Fund, JPMorgan Fleming International Growth Fund,
JPMorgan Fleming Japan Fund and JPMorgan Fleming Tax Aware International
Opportunities Fund, each a series of J.P. Morgan Mutual Fund Group (the
"Registrant").


I, Patricia A. Maleski, certify that:


1. The Form N-CSR fully complies with the requirements of Section 13(a) or 15(d)
   of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)), as
   applicable; and

2. 2. The information contained in the Form N-CSR fairly presents, in all
   material respects, the financial condition and results of operations of the
   JPMorgan Fleming Asia Equity Fund, JPMorgan Fleming European Fund, JPMorgan
   Fleming International Growth Fund, JPMorgan Fleming Japan Fund and JPMorgan
   Fleming Tax Aware International Opportunities Fund, each a series of the
   Registrant.

/s/ Patricia A. Maleski
- -----------------------
Patricia A. Maleski
Treasurer

December 29, 2003
- -----------------
Date

This certificate is furnished pursuant to the requirements of Form N-CSR and
shall not be deemed "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934, or otherwise subject to the liability of that section, and
shall not be deemed to be incorporated by reference into any filing under the
Securities Act of 1933 or the Exchange Act of 1934.