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.


Narrow Based Stock Index

Broad-based stock indices, such as the S&P 500, are defined as a basket of securities where the weight of any single constituent cannot be greater than 30% and the weight of the five largest components cannot exceed 60% of the index. All other indices are said to be narrow-based and are regulated identically to single stock futures.