The Margin System, also known as the margin system, refers to the system stipulated by the clearing house that the buyer or seller who makes a futures transaction should pay the performance bond. In futures trading, any trader must pay a certain proportion (usually 5% ~ 10%) of the price of the futures contract he buys and sells as the fund guarantee for his performance of the futures contract, and then he can participate in the futures contract trading and decide whether to add funds according to the price. This system is the deposit system, and the money paid is the deposit.

It can better ensure the safety of the customer margin by bringing the futures customer margin into the closed management of special accounts and sealing up the funds among customers, banks and exchanges.

"The biggest advantage of the closed operation of futures margin is that it can monitor the operation of margin in time and avoid being misappropriated by futures brokerage companies at some point." A futures industry insider pointed out that before, the regulatory authorities could only supervise whether the deposit was misappropriated at a certain point through annual inspection.