单选题 Option investor D sells (writes, takes a SHORT position in) one of the following call options:
Type of option: call option
Underlying asset: 100 shares of Disney stock
Exercise price: $40 per share
Premium : $2.25 per share
Expiration date : January
The current market price of Disney stock is $39.02 per share. Investor D already owns 500 shares of Disney stock. Which of the following describes the amount of initial margin required for this transaction?

A、 Since the call option is "in the money" investor D is not required to deposit initial margin.
B、 Since investor D owns at least 100 shares of Disney stock, he must deposit initial margin in the amount of 100% of the option premium.
C、 Since investor D owns at least 100 shares of Disney stock, no additional margin is required.

【正确答案】 C

【答案解析】If the owner (Long) of the call options exercises, investor D will be required to sell 100 shares, investor D already owns sufficient shares to deliver. As a result, his position is "covered," and no additional margin is required.