Futures settlement price affects profit and loss. Futures settlement price refers to the final settlement price announced by the exchange at the close of each trading day, which is the final price of futures contracts and the basis for investors to settle profits and losses. Therefore, the futures settlement price directly affects the profit and loss of investors, which is embodied as follows: for investors who buy futures, if the futures settlement price is higher than their purchase price, the investors will gain; On the contrary, if the futures settlement price is lower than its purchase price, investors will lose money. Similarly, for investors who sell futures, if the futures settlement price is lower than the selling price, investors will make a profit; On the contrary, if the futures settlement price is higher than the selling price, investors will lose money. The fluctuation of futures settlement price has a great influence on investors' profit and loss, because the fluctuation of settlement price directly affects investors' profit and loss level. If the settlement price is higher than the opening price, investors can make a profit; If the settlement price is lower than the opening price, investors will suffer losses. Therefore, investors need to pay close attention to the changes in market conditions and settlement prices in order to formulate reasonable trading strategies to control risks and achieve profitability.