PROSPECTUS SUPPLEMENT File No. 333-68747
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(To the Prospectus and Prospectus Supplement dated May 6, 1999) Rule 424(b)(3)
Prospectus number: 1889
Merrill Lynch & Co., Inc.
Medium-Term Notes, Series B
Due Nine Months or More from Date of Issue
Floating Rate Notes
Principal Amount: $5,000,000 Original Issue Date: January 18, 2000
CUSIP Number: 59018S3L6 Stated Maturity Date: December 6, 2004
Interest Calculation: Day Count Convention:
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/x/ Regular Floating Rate Note /x/ Actual/360
/_/ Inverse Floating Rate Note /_/ 30/360
(Fixed Interest Rate): /_/ Actual/Actual
Interest Rate Basis:
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/x/ LIBOR /_/ Commercial Paper Rate
/_/ CMT Rate /_/ Eleventh District Cost of
/_/ Prime Rate Funds Rate
/_/ Federal Funds Rate /_/ CD Rate
/_/ Treasury Rate /_/ Other (see attached)
Designated CMT Page: Designated LIBOR Page:
CMT Telerate Page: LIBOR Telerate Page:
CMT Reuters Page: LIBOR Reuters Page:
Index Maturity: Three Months Minimum Interest Rate: Not Applicable
Spread: 0.000% Maximum Interest Rate: Not Applicable
Initial Interest Rate: TBD Spread Multiplier: Not Applicable
Interest Reset Dates: Quarterly, on the 6th of March, June, September, and
December, commencing March 6, 2000; subject to modified
following business day convention
Interest Payment Dates: Quarterly, on the 6th of March, June, September, and
December, commencing March 6, 2000; subject to modified
following business day convention
Other: This is a reopening of a previous offering, and will be
issued with accrued interest.
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: 01/13/00
