Futures return = (closing price-opening price) times trading unit times position. Futures are margin trading, and funds are enlarged. For example, the price of a ton of copper is 70,000 yuan, and it needs 350,000 yuan in one hand, which is calculated according to the margin ratio of 10%. In this way, the capital needed for futures trading of primary copper is 35,000. If the profit of copper is 1000 points, then the profit of this copper is 5000 yuan. Futures is a zero-sum market, and the futures market itself does not create profits. In a certain period of time, regardless of the transaction costs of capital entry and exit, the total amount of funds in the futures market remains unchanged, and the profits of market participants come from the losses of another trader.