NO.PZ2021120102000010
问题如下：
Which of the following statements best describes empirical duration?
选项：
A.A common way to calculate a bond’s empirical duration is to run a
regression of its price returns on changes in a benchmark interest rate.
A bond’s empirical duration tends to be larger than its effective duration.
The price sensitivity of high-yield bonds to interest rate changes is typically
higher than that of investment-grade bonds
解释：
A is correct. A bond’s empirical duration is often estimated by running a regression of its price returns on changes in a benchmark interest rate.
虽然讲义上有个结论是Yb和spread 会抵消，但是何老师不是还有句话叫作差生更容易受到环境的影响吗？因此你可以把HYB看作是差生，那么不还是他受影响大嘛
