NO.PZ2021061002000010
问题如下：
Which of the following statement about
margin accounts is most correct?
选项：
A.It is required to bring the margin balance
back up to the maintenance margin level when get the margin call.
Initial margin is typically equal to 10% of
the futures price.
If the margin balance in the trader's
account falls below the maintenance margin, the trader will get a margin call. It
is always significantly lower than the initial margin.
解释：
C is correct
初始保证金的比例应小于等于期货合约价格的10%，B错；
当接到保证金催收电话的时候，需要将保证金补交到初始保证金的水平，注意不是维持保证金水平，A错。
C选项是对维持保证金的说明，没有问题。
Variable margin和Maintenance margin有什么区别？两个都是进initial margin，都是significantly lower than the initial margin。
