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: 1890
Merrill Lynch & Co., Inc.
Medium-Term Notes, Series B
Due Nine Months or More from Date of Issue
Floating Rate Notes
Principal Amount: $50,000,000 Original Issue Date: January 26, 2000
CUSIP Number: 59018S 3Q5 Stated Maturity Date: January 26, 2001
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: 3750
CMT Reuters Page: LIBOR Reuters Page:
Index Maturity: One Month Minimum Interest Rate: Not Applicable
Spread: -0.050% Maximum Interest Rate: Not Applicable
Initial Interest Rate: TBD Spread Multiplier: Not Applicable
Interest Reset Dates: Monthly on the 26th, subject to modified following
business day convention.
Interest Payment Dates: Monthly, on the 26th; subject to modified following
business day convention.
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: January 20, 2000
