About futures, it is said that futures is a zero-sum game. Does the buyer buy futures to sell to others? How do you know whether you have made a profit or lost? business
Zero-sum game means that futures can always be traded by a buyer and a seller. If there is no transaction cost, the sum is seller = seller, but some people earn and others lose. However, if you count the transaction costs, that is, the handling fee, then only the exchange will make money in the end. This principle is the same as playing mahjong and pumping water.