NO.PZ2016031202000020
问题如下:
Which of the following statements is most likely correct?
选项:
A.Volatility has significant effect on put-call parity.
B.According to put-call parity, the put price equals call price.
C.According to put-call-forward parity, a fiduciary call is equivalent to a protective put with a forward contract.
解释:
C is correct. put-call-forward parity:
A is incorrect, volatility has no effect on put-call parity
中文解析:
波动率对put-call parity没有影响;
put-call forward parity 是put-call parity的一个扩展,put-call parity:C+K=P+S,其中等式右边的 long stock = long forward + long bond,bond 的面值为F0(T)
注意等式左边的bond的面值为X,
0时刻便有等式:
关于C:
long call + long bond = long put +long forward + long bond (面值为F0(T)
所以long put + long bond 也是protective put? 而不是仅仅局限于 long put + long stock ?