Futures contract refers to the standardized contract formulated by the futures exchange, which stipulates that a certain number of subject matter will be delivered at a specific time and place in the future.

The exchange listed the contract and started trading.

For example, the Cu 1203 contract (the last trading day of 20 1203 15) can be traded before the last trading day.

If you think copper will rise in the near future, you can spend money: 1 lot *5 tons * disk price * the futures company will give you a deposit (about 12%) to buy 1 lot.

After a period of time, if it is as you predicted, you can close the position of 1 in your account and make a profit (if you do the opposite, you will lose money).

Similarly, if you think that the current copper price is already high, you can spend some money to sell the contract. After a while, if the copper price really comes down, you can close your position by buying a contract, so that you can buy at a high price and at a low price (meaning that you borrow someone else's goods, sell at a high price, buy at a low price when the price falls, and then return them,)