Using daily data for T-bond, Eurodollar, and Deutschemark futures and futures options contracts from 11/11/88 through 9/30/92Study options for futures contracts maturing in March, June, September, or December. Strick prices: in increments of $1 per $100 par value in the T-Bond market in increments of $0.25 per $100 par value in the Eurodollar market in increments of $0.005 per mark in the Deutschemark market3. ISD estimates we analyze are based on those calculated and sold by Knight-Ridder Financial Inc.Adjusted ISD: =_ √(_/_ )_=ISD supplied by Knight-Ridder_=market days _=Calendar to days to expiration