Period is the future, and goods are goods. As a financial derivative, futures are mainly used to hedge the risks brought by the spot market. War is good for crude oil, natural gas, nonferrous metals, agricultural products and other futures contracts, but futures are easy to be speculated. When the futures contract rises sharply, it may also be adjusted back quickly. At this time, it is not good for investors who are long. When doing futures, do a good job of short-term operation.