The adjustment of special contract parameters of futures means that when there are special circumstances such as unilateral market and holidays, the exchange will increase the transaction cost by increasing the margin or handling fee rate to reduce speculation, market overheating and futures price fluctuation. The appropriate parameters of futures (futures trading parameters) generally refer to the expiration months of futures contracts, such as March, June, September and 65438+February. In this contract, the trader can adjust the contract according to the value by choosing the easiest month.