According to the product form, financial derivatives can be divided into four categories: forward, futures, options and swaps. Among them, the futures market itself has two basic economic functions: ① the function of hedging market risks, that is, the futures market provides traders with a place to hedge market risks, so that they can reduce market risks through hedging in the futures market; ② Value discovery function, that is, the futures market is an open, fair and just competitive trading place, which concentrates many factors that affect the relationship between market supply and demand, and forms the price that best conforms to the relationship between market supply and demand through an open trading platform, reflecting the influence of various factors on the trading of specific commodities in a certain period in the future.