NO.PZ2020011303000197
问题如下：
What are the different assumptions that can be made when calculating the carry roll-down.
选项：
解释：
Carry roll-down can be calculated (a) assuming that forward rates are realized, (b) assuming that the term structure remains unchanged (c) assuming that bond yields remain unchanged, and (d) assuming that estimates made by the investor are realized.
找不到了，麻烦告知一下，谢谢！
