According to the Management Measures for Risk Control of Shanghai Futures Exchange, when the total monthly positions of nonferrous metals (copper, aluminum and zinc) are less than 12, lots, the margin ratio is 5%; 6.5% when it is between 12, and 14,, and 8% when it is more than 14, and less than 16,; So this is just a routine notice to let customers know that the margin ratio calculation has changed.

as for the proportion of limited positions, "15% for futures company members, 1% for non-futures company members and 5% for customers" means that the positions of all customers of futures company shall not exceed 15% of the total positions of the exchange, 1% for non-futures company members and 5% for a single customer, which is for general months (non-delivery month and one month before delivery). One month before the delivery and after the delivery, the position limit ratio will be reduced, not in proportion, but in absolute value (such as 1 lots, 5 lots, etc.).

the above positions are speculative positions, and there is no restriction on hedging positions.