A term applied to raw materials (gold, oil) and foodstuffs (wheat, pork bellies) traded on exchanges throughout the world. Since no one really wants to transport all those heavy materials, what is actually traded are commodities futures contracts or options. These are agreements to buy or sell at an agreed price on a specific date. Because commodity prices are volatile, investing in futures is certainly not for the casual investor.
A type of derivative often lumped together with options, but slightly different. The original derivative was a future used by farmers to set the price of their produce in advance before they sowed the seeds so that after the harvest, crops would be sold at the pre-agreed price no matter what the movements of the market. So a future is a contract to buy or sell a fixed quantity of a particular commodity, currency or security (share, bond) for delivery at a fixed date in the future for a fixed price. At the end of a futures contract, the holder is obliged to pay or receive the difference between the price set in the contract and the market price on the expiry date, which can generate massive profits or vast losses.