问题
单项选择题
The lower bound for an American call option is:
A．
| A. Max (0, S-X). |
B．
| B. Max [0, S-X/(1 +RFR)T] |
C．
| C. Max [0, X/(1 +RFR)T-S]. |
答案
参考答案：C
解析：The lower bound for an American call ranges from zero to the prevailing stock price less the present value of the exercise price discounted at the risk-free rate.