这个操作是卖空，如果价格下降，他是没有风险的，为什么还要保证金呢？

问题如下：

Caroline Rogers believes the price of Gamma Corp. stock will go down in the near future. She has decided to sell short 200 shares of Gamma Corp. at the current market price of €47. The initial margin requirement is 40%. Which of the following is an appropriate statement regarding the margin requirement that Rogers is subject to on this short sale?

选项：

A.

She will need to contribute €3,760 as margin

B.

She will need to contribute €5,640 as margin

C.

She will only need to leave the proceeds from the short sale as deposit and does not need to contribute any additional funds

解释：

She will need to contribute €3,760 as margin. Initial margin is the money that must be deposited in a futures account before any trading takes place. Before trading, She must deposit €3,760 = 40% of €9,400 (€9,400 = 200 X €47) as the initial margin.