Futures trading margin is the customer's own funds under the margin account, that is, the customer's funds, which not only do not charge interest, but also pay interest to the customer according to the current interest rate and pay interest to the customer regularly.

At present, there is no clear provision for futures companies to close their positions due to insufficient margin paid to customers. However, because the margin ratio between futures companies and customers, futures exchanges and futures companies is different, for example, the margin ratio between customers and futures companies is 10%, then the margin ratio between futures exchanges and futures companies may be 5-8%, so futures companies themselves do not need to really advance funds. Therefore, overnight interest is generally not charged.