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.
A sum usually smaller than, but part of, the original margin (security deposit) that must be maintained on deposit at all times. If your account falls below the maintenance margin requirement, you will receive a margin call. If you wish to continue to hold the position, you will be required to restore your account to the full initial margin level (not to the maintenance margin level). See Margin.