Deduct money, and deduct as much as you lose. The rest is his own.

Just take all the losses when you settle the account.

Look, you don't understand.

For example, if you want to buy a computer, because the price of the computer is going to go up, so you decide to give him a deposit first. 200 yuan, he gave you a ticket that said: The contract holder has the right to buy a computer at a price of, say, 2000 yuan on a certain day.

Well, you have a futures contract now, so you later found that the computer went up, went up a lot, and will go up, but you thought the computer would definitely go down, so you sold the contract and wanted to buy a cheaper one in the future.

For example, the computer has risen to 2200 yuan now, and it may go up again. You sell it to others at a price of 2200 yuan, and there is one thing in the contract that should be changed, that is, the price.

The deposit is correspondingly increased to 220, because it is 10% deposit.

Then the money you earn is 200 yuan, not the deposit, but the extra money from the price increase of this computer.

2200-2000=200