NO.PZ2015120604000055
问题如下:
The quarterly returns for FTSE 100 over the year 2016 were 8%, -5%, 3% and 1%. What is the quarterly geometric mean return for FTSE 100?
选项:
A.
1.64%.
B.
1.75%.
C.
Not available, as negative observation exits.
解释:
A is correct
Geometric mean =(1.08*0.95*1.03*1.01)0.25 - 1 = 1.64%
为什么开根号 不是加起来一年么 无需开根号吧