More appropriately, if you want to make money and avoid risks through hedging, you can buy and sell futures that expire at the same time at different times. For example, if you buy 100 lots of copper with a six-month maturity now, the spot price will rise after three months, which is good for you, but you are worried that the price will fall again in the future. At this point, you can now sell 65,438+000 lots of copper with a three-month maturity (at this time, the price will be higher than the purchase).