问题
单项选择题
An investor buys two calls and one put on ABC stock, all with a strike price of $45. The calls cost $5 each, and the put costs $4. If the investor closes the position when ABC is priced at $55, the investor's per share gain or loss is :
A．
| A. $4 loss. |
B．
| B. $6 gain. |
C．
| C. $10 gain. |
答案
参考答案：B
解析：The combined cost of the two options is (2 × $5 ) + $4 = $14. At expiration, the put is worth Max [0, 45 -55] = $0. Each of the two calls is worth Max[0, S -X ] = $10. Thus, the per share gain/loss is: - $14+ $0+(2× $10) = $6.
