PROSPECTUS SUPPLEMENT File No. 333-68747
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(To Prospectus and Prospectus Supplement dated May 6,1999) Rule 424(b)(3)
Prospectus number: 1911
Merrill Lynch & Co., Inc.
Medium-Term Notes, Series B
Due Nine Months or More from Date of Issue
Floating Rate Notes
Principal Amount: $136,000,000 Original Issue Date: March 3, 2000
CUSIP Number: 59018S 4K7 Stated Maturity Date: March 7, 2001
Interest Calculation: Day Count Convention:
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x Regular Floating Rate Note x Actual/360
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Inverse Floating Rate Note 30/360
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(Fixed Interest Rate): Actual/Actual
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Interest Rate Basis:
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LIBOR Commercial Paper Rate
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CMT Rate Eleventh District Cost of Funds
Rate
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Prime Rate CD Rate
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x Federal Funds Rate Other (see attached)
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Treasury Rate
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Designated CMT Page: Designated LIBOR Page:
CMT Telerate Page: LIBOR Telerate Page:
CMT Reuters Page: LIBOR Reuters Page:
Index Maturity: Daily Fed Funds Minimum Interest Rate: Not Applicable
Effective
Spread: 0.1600% Maximum Interest Rate: Not Applicable
Initial Interest Rate: TBD Spread Multiplier: Not Applicable
Interest Reset Dates: Daily, subject to the modified business day convention.
Interest Payment Dates: Quarterly, on the 7th of June, September, December and
at Maturity, subject to the modified 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: February 29, 2000
