Trading Unit: One CBOT Silver futures contract (of a specified contract month) of 1000 troy Ounces

Tick Size: 1/100 of a cent/troy oz ($ 1 /contract)

Strike Prices: 25 cents/troy oz for strike pi-ices less than $8; 50 cents/troy oz for strike prices from $8 to $20; $ 1 troy oz for strike prices of $20 or more

Daily Price Limit: $ 1 /troy oz ($ 1,000/contract) above or below the previous days settlement premium (expandable to $1.50/Troy OZ). Limits are lifted on the last trading day.

Contract Months: Feb, Apr, Jun, Aug, Oct, Dec

Last Trading Day: The last Friday preceding the first notice day for the corresponding silver futures contract by it least five business days

Exercise: 'The buyer of a futures option may exercise the option on any business day prior to expiration by giving notice to the Board of Trade Clearing Corporation by 6:00 p.m. Chicago time. Option exercise results in an underlying futures market position. Options in-the-money on the last day of trading are automatically exercised.

Expiration: Unexercised options expire at 10:00 a.m. Chicago time on the first Saturday following the last day of trading.

Trading Hours: 7:25 a.m. - 1:25 p.m. Chicago time, Mon- Fri. Trading in expiring contracts closes at 1:25 p.m. on the last trading day.

Ticker Symbols: AC for calls/AP for Puts