The transaction cost of futures consists of two parts, one is the handling fee charged by the exchange, the other is the handling fee charged by the futures company.

The exchange has to pay, and the futures company can negotiate. At present, most futures companies do not charge fees because of market competition.

In addition, because of the exchange's incentive policy, the exchange will return a part of the handling fee to the futures company according to a certain proportion every month. Futures companies receive these returns because of market competition, and futures companies will also give these returns to investors.

Therefore, the current optimal cost should be 70% of the transaction fee. (Because most of the time, the return of the exchange company is around 30%)