The settlement price of stock index futures delivery refers to the benchmark price for cash delivery when futures contracts enter the last trading day. According to the existing rules of CICC, the settlement price of the day refers to the weighted average price of the trading volume of the futures contract in the last hour. If there is no transaction in the last hour and the price is on the price limit, the price of the price limit shall be taken as the settlement price of the day. If there is no transaction in the last hour, and the price is not within the price limit, the weighted average price of the volume in the previous hour will be taken. And the closing price is only the price at the last moment.