NO.PZ2018070201000035
问题如下：
What's the holding period return of an investor who bought 200 shares stocks at $20 per share and sold all at $22.5 per share after receiving $0.2 dividend per share over one quarter.
选项：
A.11.5%.
B.12.5%.
C.13.5%.
解释：
C is correct.
The holding period return is 13.5% which is calculated as (22.5-20+0.2)/20 = 13.5%, including dividend yield = 0.2/20= 1%, capital gain yield = (22.5-20)/20=12.5%.
p0=d0/r,题目中p0和d0都已知。那就可以求r
则，r= 0.2*200/20*200=0.01
如果这个r算出来是年化，那就可以用（1+HPR)4次方=1+r，反推HPR么？
