| http://www.w3.org/ns/prov#value | - Since then, the spread has averaged 62 cents, with the futures trading at a discount because they essentially represent a wholesale price that excludes taxes, transportation fees, service-station markups and other costs.Click here for the whole article (online subscription required).For the unitiated, a futures contract is a contract to buy (or sell) a commodity at a predetermined price at some fi
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