The essence of futures is to sign long-term contracts with others to buy and sell goods (or stock indexes, foreign exchange, interest rates) in order to achieve the purpose of maintaining value or making money.

Opening a position is to sign a contract, and closing a position is to perform the contract. After liquidation, the contract does not exist.

If investors open positions, they will have 10 bulls and 6 shorts. In fact, the net position is only (10 long position -6 short position) 4 long positions. If this is the case, you need to sell more than 10 and buy 6 short positions when you close your position, which costs 6 transaction fees.