EX-99.906CERT CERTIFICATION R. JAY GERKEN, Chief Executive Officer, and LEWIS E. DAIDONE, Chief Administrative Officer of Cash Reserves Portfolio (the "Registrant"), each certify to the best of his or her knowledge that: 1. The Registrant's periodic report on Form N-CSR for the period ended August 31, 2003 (the "Form N-CSR") fully complies with the requirements of section 15(d) of the Securities Exchange Act of 1934, as amended; 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 Registrant. Chief Executive Officer Chief Administrative Officer Cash Reserves Portfolio Cash Reserves Portfolio /s/ R. JAY GERKEN /s/ LEWIS E. DAIDONE - ---------------------- ----------------------- R. Jay Gerken Lewis E. Daidone Date: October 16, 2003 Date: October 16, 2003 This certification is being furnished to the Securities and Exchange Commission solely pursuant to 18 U.S.C. ss. 1350 and is not being filed as part of the Form N-CSR with the Commission.