"Because futures are traded with margin, you only need to pay 5%-20% margin, so the profit and loss are enlarged by 5 to 20 times.

For example, if you buy a copper futures contract, the contract price is 10000 yuan (2000 yuan per ton, 5 tons per lot), and you only need to have 500 yuan in your account. After a few days, copper futures rose to 2500 yuan, of which 500 yuan is your profit (if you sell the contract at this time), and profit/margin * 100% is your profit rate = 100%.

Loss: Your deposit in 500 yuan flew when it dropped from 2,000 yuan to 1500 yuan. If you don't sell it, you must pay a deposit of 5% of the contract amount. "

According to the calculation upstairs, if 500 yuan is used to do the business of 10000 yuan (2000*5), if the price per ton rises from 2000 yuan to 2500 yuan, the total profit will be 500*5=2500 yuan, and the profit rate will reach 500%.

On the other hand, if the price drops from 2000 yuan to 1500 yuan, then the total loss is 500*5=2500 yuan. At this time, you not only lost the 500 yuan deposit, but also owe the futures company 2000 yuan, and the futures company will recover it from you.