<http://schema.org/description>
"When you buy a stock future, you&amp;#039;re not actually buying shares of stock. Instead, you&amp;#039;re making a contract to buy or sell shares on a certain date in the future."^^<http://www.w3.org/2001/XMLSchema#string>
<http://money.howstuffworks.com/personal-finance/financial-planning/stock-future4.htm>