1. The Measures for the Administration of Risk Control of Shanghai Futures Exchange stipulates that the criteria for collecting trading margin when the positions of copper, aluminum and zinc futures contracts change are as follows: from the first trading day of the third month before the delivery month, when the total positions (X) meet the following criteria:

When X ≤ 1.2 million, the deposit ratio is 5%;

120,000 yuan < x ≤140,000 yuan, the deposit ratio is 6.5%;

140000 < X ≤ 160000, the deposit ratio is 8%;

When x > 654.38+0.6 million, the deposit ratio is 654.38+00%.

Other varieties are different from those of other exchanges, but they are all related to total positions. Please refer to the risk control management measures of each exchange.

2. With regard to the position limit ratio, 15% means that the total one-way net position of the futures company (accumulated by all customers) shall not exceed15% of the total position of the exchange this month; Non-futures company members refer to self-operated members of the exchange, such as metal materials companies, grain and oil companies, trading companies, etc.

The unilateral net position of a single customer shall not exceed 5%. Customers refer to corporate customers or natural person customers, and the position limit standards are the same.