问题如下:
Benedict, an analyst from an investment company, recently gathered the following data for a value-weighted index comprised of securities G,H,I:
What is the value-weighted index' return over the period?
选项:
A.6.78%.
B.3.94%.
C.12.40%.
解释:
It is the percentage change in the market value over the period:
Percentage change is with rounding, is calculated as the below table:
考点:市值加权的指数
1、value-weighted index就是market-capitalization weighting市值加权的意思。
2、很多同学问为何上述计算要“减 1”。我们现在要求的是收益率,26400-25400=1000才是收益,所以收益率等于1000/25400=3.94%,因此上述公式需要减掉1。
这题为什么要带入市值计算,不能直接算每只股票的return后加起来除以3吗?