A settlement system in which the settlement department calculates and checks the balance of the margin account after the daily closing, and keeps the balance of the margin above a certain level by issuing a notice of additional margin in time to prevent debt. The specific implementation process is as follows: after the end of each trading day, the settlement department of the exchange calculates the settlement price of the day according to the trading situation of the whole day, and accordingly calculates the floating profit and loss of each member's position, and adjusts the available balance of the member's margin account. If the adjusted margin balance is lower than the maintenance margin, the exchange will issue a notice before the opening of the next trading day, requesting additional margin. If the member unit fails to add the margin on time, the transaction ownership will be forced to close the position.

Because the futures market often fluctuates greatly in one day, if the "instantaneous" profit and loss results are taken as the act of "forcibly closing the position" of one party, it is likely to cause a lot of trading disputes on the one hand, and even the whole transaction can not be carried out normally on the other hand; Therefore, the exchange generally adopts "fund settlement" at some time before the closing of the market or at some time before the opening of the next trading day; If the party with insufficient margin fails to make up the margin in time within the specified time, the exchange will exercise the right of compulsory liquidation.