Futures margin refers to a certain amount of funds or a certain amount of qualified securities deposited by futures clearing members in accordance with the settlement rules as a guarantee for futures trading settlement and performance. In the financial market, there are more and more wealth management products, including stocks, bonds, futures, foreign exchange and gold. Compared with stock investment, futures trading has high returns, but it also has risks, because futures investors require to pay margin, so the trading risks are invisibly amplified, which is a unique mechanism of futures trading. In China, futures margin can be divided into two categories according to its nature and function: settlement reserve and trading margin.

First, the standard of deposit collection

1. The deposit amount should be greater than the contract advance payment amount to avoid possible risks;

2. The amount of the deposit should be equal to or slightly higher than the bid bond. If the project with high technical content and unable to perform on time brings huge losses to the purchaser, the amount of the performance bond should be appropriately increased;

3. The determination of the deposit amount should be related to the contract payment terms. It is preliminarily assumed that the relationship between them should be inversely proportional, that is, when the installment payment terms are favorable to the supplier, the deposit should be overcharged, and vice versa.

2. Proportional margin and fixed margin

The proportional margin system is the trend of market development, because it can keep the risks of futures companies and exchanges at a certain level all the time, while the fixed margin system can not meet such requirements. If the fixed margin system wants to ensure that the risks of exchanges and futures companies are always within the controllable and acceptable range, only by setting the original margin high enough to make the index fluctuate at the highest level, the customer margin will still be guaranteed to be no less than a certain order of magnitude.

Third, the purpose of maintaining deposits.

The so-called maintenance margin refers to the margin determined to maintain the balance of interests of both parties after the completion of financing or securities lending transactions when the securities market changes in the opposite direction. Specifically, the ratio between the amount of margin and the actual value or price of mortgage securities needs to be kept at the lowest level, which is the ratio of maintaining margin, or the actual maintenance rate of margin.