First of all, you should understand that futures are settled daily without debt, that is, before the daily closing. There is the concept of today's settlement price: the transaction price of futures contracts on that day is based on the weighted average price of volume, and the settlement price of the previous day is based on the absence of volume on that day. In the time-sharing chart of futures market software, you will see a yellow line, and the average price line is the settlement price of the day. There are two kinds of daily profit and loss settlement: one is called liquidation profit and loss settlement, which is divided into historical liquidation profit and loss and daily liquidation profit and loss. The other is called position profit and loss. Divided into historical position profit and loss and current position profit and loss. There are many complicated profit and loss formulas. You just need to remember that if there is no opening on that day, the exchange will settle according to today's settlement price and your opening price. For example, a new customer received a deposit at a price of 654.38+10,000 yuan, and in May 1 opened a position to buy 40 lots of soybean futures at a transaction price of 4,000 yuan per ton. On the same day, customers closed their positions and sold 20 contracts, with a transaction price of 4030 yuan/ton, a settlement price of 4040 yuan/ton on the same day, and a trading margin ratio of 5%. So what is the customer's profit and loss for the day? (excluding fees, taxes, etc. (1) liquidation profit and loss =(4030-4000)X 20 X 10=6000 yuan (2) position profit and loss = (4040-4000) x (40-20) x10 = 80. Buy at 3000 points and rise to 3 100 points. Sell at 3 100 on the same day, and you earn 100 * 300 = 30000. If the stock index changes the next day, your income will definitely change.