The exchanges where these products trade determine what the contract specifications are and have the ability to change them based on exchange rules and market conditions.
These “specs” are for the products traded as of December 2004. The best way to ensure that you have the most current and accurate information is to visit the web site of the exchange where the contract you're interested in is traded.
Explanations of the acronyms used for the exchanges, special codes and symbols, and the letters that represent each contract's delivery months follow.
Options on U.S. Futures