Futures glass is a variety traded by Zheng Shang, and the margin ratio of each company may be different. The margin ratio of the main glass contract is usually between 10- 15%.

The trading unit of futures glass is hand (20 tons per hand), and the margin for first-hand glass is: glass unit price (RMB/ton) ×20× margin ratio.

If it is a warehouse, the unit price of glass is calculated according to the opening price; If it is yesterday's warehouse, the glass unit price is calculated according to the settlement price of the previous trading day.