Shanghai and Shenzhen 300 Index Futures is the first financial futures contract launched by China Financial Futures Exchange. Since its launch, trading has been active and stable, and the scale of trading has expanded year by year, which has become an important product in China and even the international stock index futures market. The last trading day of Shanghai and Shenzhen 300 stock index futures is the third Friday of the contract expiration month, which will be postponed in case of legal holidays.