NO.PZ2020021203000057
问题如下：
An option has a strike price of USD 50. The company declares a 3-for-1 stock split. What effect does this have on the strike price?
选项：
解释：
The strike price becomes USD 50 X (1/3) = USD 16.67.
1股拆3股，股份数上涨了4倍，所以股价下跌4倍，所以执行价格也下跌4倍 50/4=12.5
