Super Finance Glossary Over 10,000 financial glossary terms... Browse by Letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Or Enter Search Term: By Author: All Sources Campbell Harvey Internal Revenue Service Finance Globe FDIC Snow Gold CFTC U.S. Census Bureau Search Tips Back Spread Source Back SpreadDefinition: A delta-neutral ratio spread in which more options are bought than sold. A back spread will be profitable if volatility increases. See Delta.