PROSPECTUS SUPPLEMENT File No. 333-38792
(To Prospectus Supplement and Prospectus Rule 424(b)(3)
dated June 16, 2000 and June 15, 2000, respectively)
Prospectus number: 1998
Merrill Lynch & Co., Inc.
Medium Term Notes, Series B
Due Nine Months or More from Date of Issue
Fixed Rate Notes
Principal Amount: $41,000,000
CUSIP Number: 59018Y AN1
Interest Rate: 6.97000%
Original Issue Date: August 1, 2000
Stated Maturity Date: August 1, 2001
Interest Payment Dates: At Maturity
0
Repayment at the Option
of the Holder: The Notes cannot be repaid prior to the Stated
Maturity Date.
Redemption at the Option
of the Company: The Notes cannot be redeemed prior to the Stated
Maturity Date.
Form: The Notes are being issued in fully registered
book-entry form.
Trustee: The Chase Manhattan Bank
Dated: July 27, 2000
