Prospectus Supplement No. 2036                        File No. 333-38792
- ------------------------------------
To (A) the Medium - Term Notes (no series             Rule 424 (b) (3)
designated) the Prospectus dated June 15, 2000,       Market Making Transactions
an (B) the Medium - Term Notes (Series B)
Prospectus and Prospectus Supplement Dated
June 15, 2000, and June 16, 2000, respectively.




                            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 September  29, 2000,  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                      N/A
     From 18 Months but less than 2 Years                        N/A
     From 2 Years but less than 3 Years                     5.00% to 7.00%
     From 3 Years but less than 4 Years                     5.71% to 6.38%
     From 4 Years but less than 5 Years                     5.64% to 6.55%
     From 5 Years but less than 6 Years                     5.50% to 7.25%
     From 6 Years but less than 7 Years                          6.18%
     From 7 Years but less than 10 Years                     .25% to 7.00%
     10 Years or more                                       6.05% to 8.125%


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).


          0   This reflects  actual  interest  rates for fixed rate  Medium-Term
              Notes (no series  designated) and Medium-Term Notes (Series B). ML
              & Co. also 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. In addition, ML & Co. has outstanding Medium-Term
              Notes  (Series B) the return on which is  correlated to changes in
              the market  price of  various  equity  securities  or the level of
              various published indices, or baskets thereof, as the case may be.



Dated:  October 30, 2000