File No. 33-52647 Rule 424(B)(3) Prospectus Supplement No. 1170 Market-Making (To Prospectuses dated September 9, 1993 and Transactions March 29, 1994) MERRILL LYNCH & CO., INC. MEDIUM-TERM NOTES (NO SERIES DESIGNATED) MEDIUM-TERM NOTES (SERIES B) This Prospectus is used by Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), a wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), in connection with offers and sales related to market-making transactions in the Medium-Term Notes (no series designated) and Medium-Term Notes (Series B) of ML & Co., in which transactions MLPF&S acts as a principal. Such sales will be made at prices related to prevailing market prices at the time of sale. As of July 15, 1994, Medium-Term Notes (no series designated) and Medium-Term Notes (Series B) of ML & Co. have been issued and are currently outstanding as follows: From 9 Months but less than 12 Months N/A From 12 Months but less than 18 Months 3.41% to 5.20% From 18 Months but less than 2 Years N/A From 2 Years but less than 3 Years 4.50% to 6.45% From 3 Years but less than 4 Years 4.65% to 7.23% From 4 Years but less than 5 Years 7.20% to 9.50% From 5 Years but less than 6 Years 6.36% to 9.00% From 6 Years but less than 7 Years N/A From 7 Years but less than 10 Years N/A 10 Years or more 7.60% to 8.13% MLPF&S may also act as an agent for its customers in connection with other secondary market transactions in the Medium-Term Notes (no series designated) and Medium-Term Notes (Series B). ________ * This reflects actual interest rates for fixed rate Medium-Term Notes (no series designated) and Medium-Term Notes (Series B). In addition, ML & Co. has outstanding a variety of floating rate Medium-Term Notes (no series designated) and Medium-Term Notes (Series B), the interest rates of which are reset periodically depending on various indices. Dated: July 28, 1994