Call不是持币待买，能不能这么理解

问题如下：

Johnson purchased call options on A stock. Which of the following will cause a decease in the value of Johnson's position?

选项：

A.

An increase of dividends on A stock.

B.

The increase of risk-free interest rate.

C.

The increase of volatility on A stock price.

D.

None of them above.

解释：

A is correct.

考点：option 估值。

解析：分红的增加会降低 call option 的价值，A正确。D不正确。

无风险利率以及股票价格的波动增加均会增加call option的价值，B、C、不正确。