NO.PZ2023080903000029
问题如下：
An investment was held for a period of 18 months, during which it generated a holding period return of 8.5%. The closest estimate of its annualized return is:
选项：
A.7.2%
B.5.6%
C.8.1%
解释：
(1+0.085)1812−1≈0.056
应该是12/18 次方吧？
