Welcome to the RJO Futures trading terms glossary. Within this glossary, you will find an expansive list of trading terms covering commodity, option, and futures trading terminology. Bookmark this section as a quick reference for definitions of trading terms as you browse the Internet and our site for more information on futures and options trading within the financial and commodities markets.



To make an option seller complete the requirements of the option contract. For a call (put) option, the writer would have to sell (buy) the underlying security at the stated strike price.