Ticker Symbols: Calls: GI Puts: GI

Underlying Contract: One GSCI futures contract

Strike Prices: 2 GSCI points, e.g., 190,192, etc. (Half- interval strike prices for contract month nearest maturity, e.g., 190,191,192, etc.)

Premium Quotations: U.S. dollars per Index point

Min Price Fluct: .10 Index points ($25 per contract) (cabinet - $12.50)

Daily Price Limit: None

Contract Months: Feb, Apr, Jun, Aug, Oct, Dec and serial months

Trading Hours: (Chicago Time): 8:15 am-2:15 pm

Last Day of Trading: February bimonthly cycle contracts: the fourth business day of contract month; serial months: first Friday of serial month that is a business day

Min Perform Bond: No performance bond required for put or call option buyers, but the premium must be paid in full; option sellers must meet additional performance bond requirements as determined by the Standard Portfolio Analysis of Risk (SPAN) performance bond system.

Exercise Procedure: An option may be exercised by the buyer up to and including the last day of trading. To exercise, the clearing member representing the buyer submits an Exercise Notice to the Clearing House by 7:00 pm on the day of exercise. Any long in-the-money option position not liquidated or exercised prior to termination of trading will be automatically exercised.