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How to calculate the futures margin? Margin = stock index futures point × number of contracts.
Margin = quotation of futures contract * contract unit * margin ratio

Take rebar as an example. Now the quotation is about 3023, and the thread contract of 1 is 10 ton, so the contract unit is 10, and the margin ratio is about 13% in our Shenzhen business department of China Securities Futures.

Then the deposit of 1 hand thread is

Margin = 3023 *10 *13% = 3929 yuan.

Other varieties have the same sub-algorithm, what's not to understand?