NO.PZ2016031002000073
问题如下：
Which of the following is most likely to raise the required YTM?
选项：
A.Call option.
B.The floor of a floating exchange rate.
C.Put option.
解释：
A is correct.
Call options are good for the issuer and raise the required YTM. On the contrary, a put option or a floor protects favor the bondholder, thus decreasing the required YTM.
ymt是折现率。。。我看成了pmt。。。真的考试的时候至于这么简化不。。。。折现率我就知道选A
