Websites about commodities, futures, derivatives, and options on futures. Before submitting your site, please review the Guidelines for Submitting a Site. The futures markets evolved because of the necessity to control price fluctuations, large differences between supply and demand, and to minimize price risk to producers and merchandisers. The commodity exchanges bring buyers and sellers together so they can agree on a price. This is done by open out cry, and computerized trading. Bid/Ask information is readily accessible so prices are better able to reflect realistic economic conditions.