January 2, 2001
Dreyfus Institutional Money Market Fund
Supplement
dated
January 2, 2001
to the
Prospectus
dated
May 1, 2000
The Fund's investments include certificates of deposit, time
deposits, bankers' acceptances and other short-term securities
issued by U.S. banks and foreign branches of U.S. banks.
January 2, 2001
Dreyfus Institutional Money Market Fund
Supplement
dated
January 2, 2001
to the
Statement of Additional Information
dated
May 1, 2000
The Fund's investments include certificates of deposit, time deposits,
bankers' acceptances and other short-term securities issued by U.S.
banks and foreign branches of U.S. banks.