For example, the copper price of 1309 contract is now 50,000, which means that the spot price of 13 in September is expected to be 5. 1 10,000 tons. However, it is not yet September, and the market economy is constantly changing. Therefore, the expected price will also change constantly. If the country launches a stimulus plan, it is expected that the consumption of copper will increase, so the price will rise. The essence of futures is to reflect the expected price.