About: http://webisa.webdatacommons.org/244894641

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Various types of spreads (e.g., vertical, horizontal, ratio, back, front, etc.) are also used to trade futures contracts, stocks, bonds and other financial instruments and financial contracts in addition to options.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com