A certain variety of futures will disappear. Futures are sometimes limited and will be cancelled. Futures, whose English name is futures, is completely different from spot. Spot is actually a tradable commodity or commodity. Futures are mainly not commodities, but standardized tradable contracts with some bulk products such as cotton, soybeans and oil and financial assets such as stocks and bonds as the targets. Therefore, the subject matter can be a commodity, such as gold, crude oil, agricultural products and financial instruments. The standardized contract made by the futures exchange stipulates that a certain quantity and quality of the subject matter will be delivered at a specific time and place in the future.