The specific calculation formula is as follows:
Profit and loss of the day = ∑ [(selling price-settlement price of the day) × selling quantity× contract multiplier]+∑ [(settlement price of the day-buying price )× buying quantity× contract multiplier]+(settlement price of the previous trading day-settlement price of the day) × (selling position of the previous trading day-buying position of the previous trading day )× contract multiplier.
The profit and loss of the day are transferred at the time of settlement, and the profit is included in the settlement reserve, and the loss is withdrawn from the settlement reserve.