NO.PZ202112010200000801
问题如下：
The rolldown returns over the 1-year investment horizon for the Buy-and-Hold and Yield Curve Rolldown portfolios are closest to:
选项：
A.1.00% for the Buy-and-Hold
portfolio and 3.01% for the Yield Curve Rolldown portfolio, respectively.
0.991% for the Buy-and-Hold portfolio and 3.01% for the Yield Curve Rolldown portfolio, respectively.
0.991% for the Buy-and-Hold portfolio and 2.09% for the Yield Curve Rolldown portfolio, respectively.
解释：
A is correct.
Since both strategies use zero-coupon bonds, the rolldown return is calculated from expected bond price changes from “rolling down” the THB yield curve, which is assumed to be static.
- Buy and Hold: 1.00% = (100.00 - 99.009)/99.009
- Yield Curve Rolldown: 3.01% = (99.009 - 96.1169)/96.1169
2年期债券YTM=2%。 那么PB=100/（（1+2%）^2) = 96 . 过了1年以后，PE=100/(1+2%)=98. 我理解PE/PB-1=2%
为什么答案里面的PE是用100除以1.01作为期末债券价格呢？
