File No. 33-38879 Rule 424(b)(3) PROSPECTUS SUPPLEMENT (To Prospectus dated March 24, 1994) (To Prospectus Supplement dated March 29, 1994) No.: 1166 Dated: 06/14/94 MERRILL LYNCH & CO., INC. Medium-Term Notes Base Rate: Treasury Indexed Rate Index Maturity: Six Months Maturity Date: 06/23/97 Redemption Date: N/A Optional Repayment Dates: N/A Spread: 0.150% (plus fifteen basis points) Spread Multiplier: N/A Maximum Interest Rate: N/A Minimum Interest Rate: N/A Interest Reset Dates: 6-month Treasury Bill auction yield (Federal Reserve Bulletin H.15), reset weekly. Interest Payment Dates: June 23 and December 23, commencing December 23, 1994, through the Maturity Date. Initial Interest Rate: 4.87% Form: Book-entry