问题如下:
An analyst gathers the following data for a price-weighted index:
The price return of the index over the period is:
选项:
A. 4.2%.
B. 7.1%.
C. 21.4%.
解释:
A is correct.
The sum of prices at the beginning of the period is 96; the sum at the end of the period is 100. Regardless of the divisor, the price return is 100/96 – 1 = 0.042 or 4.2 percent.
请问为什么不是(每股价格*购买股票)然后相加,再除以总股票数呢