Futures trading settlement is organized by the futures exchange. Futures exchanges implement a debt-free settlement system on the same day, also known as "marking the market day by day". It means that after the daily trading, the exchange will settle the profit and loss, trading margin, handling fees, taxes and other expenses of all contracts according to the settlement price of the day, and transfer accounts receivable and accounts payable at the same time, thus increasing or decreasing the settlement reserve of members accordingly. Every transaction is conducted at the market price, and the transaction price MINUS the opening price is the profit and loss of the account. The profit and loss of a single position in the account is calculated based on the settlement price within the contract day, and the settlement price of that day is calculated based on the weighted average of the trading volume of that day.

Open futures contracts are based on the settlement price of the day as the basis for calculating the profit and loss of the day. The profit and loss of the day can be calculated separately.

The itemized settlement formula is: profit and loss of the day = profit and loss of liquidation+profit and loss of position.

(1) Ending profit and loss = average historical profit and loss+average current profit and loss.

(2) Position profit and loss = historical position profit and loss+opening profit and loss on the same day

2. Calculate the profit and loss according to the difference between the market price and the opening price when closing the position.

3. How to determine the transaction price: The computer automatic matching system of the exchange sorts the transaction declarations according to the principle of price priority and time priority.

When the buying price is greater than or equal to the selling price, the transaction will be automatically matched. The matching transaction price is equal to the middle value of the buying price (bp), selling price (sp) and the previous transaction price (cp). Namely:

When bp≥sp≥cp, the latest transaction price =sp.

Bp≥cp≥sp, the latest transaction price =cp.

Cp≥bp≥sp, the latest transaction price =bp.

This kind of blind date has two basic principles.