NO.PZ2018062002000045
问题如下：
Drew, an analyst from an investment company, recently gathered the following information for a price-weighted index comprised of securities D，E，F:
What is the price return of this index?
选项：
A.
–4.6%.
B.
–8.7%.
C.
–9.3%.
解释：
B is correct.
The price-weighted index's price return is the percentage change in the index's price:.
考点：价格加权指数计算price return
这道题原解析已经很清晰了，只要注意我们这里计算的是price return，所以不需要考虑期间收益。
分别计算出D/E/F的price return然后再除以3，这样计算可以吗？我算出来的price return为-3.23%，跟题目答案对不上
