Rule 497(d)
FT 420
Supplement to the Prospectus dated April 12, 2000
Sales Charge Discount for Eligible Purchasers
Notwithstanding anything to the contrary in the Prospectus, you can use
your redemption or termination proceeds from any Nike Securities L.P. spon-
sored unit investment trust to purchase Units of the Trust in FT 420 during
the initial offering period at the Public Offering Price less 1%.
Dealers and other selling agents will receive a concession or agency
commission of 1.75% of the sales price of Units sold pursuant to this provision.
May 3, 2000
