About the understanding of "floating profit and loss", futures trading and stock trading are different, which is also a core difference between them.

As we all know, futures trading settlement adopts the daily debt-free settlement system, also known as the daily mark-to-market system. According to the definition in the process of futures market, it means that after the daily trading, the exchange will settle the profits and losses of all contracts at the settlement price of the day, and the trading margin, handling fees, taxes and fees will be transferred at the same time, and the accounts receivable and payable will increase or decrease accordingly. Specifically, the settlement department of the futures exchange calculates the settlement price of the trading day at the daily closing, and then settles the profit and loss of each member's position according to the settlement price of the trading day. The loss must be notified to the member in time, and the surplus will be automatically transferred to the member's account by the settlement department of the futures exchange, so as to realize daily debt-free. By the same token, the brokerage company will make daily settlement for each of its customers according to the settlement notice of the exchange. It can be seen that the daily debt-free settlement makes the cash in the settlement reserve accounts of members and customers really flow, and the profit and loss actually occur.

The stock market is different from the futures market. Suppose a stockholder bought a stock at the price of 20 yuan earlier, but the current price of this stock is only 15 yuan. In essence, investors have suffered losses, but investors can comfort themselves. This is only a theoretical loss. As long as I don't sell stocks, it will never become a real loss. The floating profit and loss of the stock market and the "floating profit and loss" of futures trading are not the same concept. As long as the stock is not sold, there will be no cash flow in the account.

Therefore, a core difference between futures trading and stock trading is that there is no concept of floating profit and loss in futures trading (of course, strictly speaking, the floating profit and loss of accounts varies every specific trading day). The book profit and loss of customers before liquidation is not a state, but a cash flow, which is an actual result.