NO.PZ2018062002000052
问题如下：
Which part of the formular is required an adjustment after a stock split when using the price weighting method？
选项：
A.Denominator.
B.Numerator.
C.Both numerator and denominator.
解释：
A is correct.
Denominator must be adjusted after a stock split when using the price weighting method, in order to ensure index value immediately after the split is the same as the index value immediately prior to the split.
考点：price weighting method
题干问当股票分拆，价格加权指数公式的哪一部分需要进行调整。这里是price-weighting index的内容，因为拆股所导致股价下降不是真正的股价下跌，所以我们要对指数的权重即分母进行调整。
看了解析还是有疑问，明白拆股只是从100变到50，实质并没有发生变化。分母需要重新计算，但是在代入公式时，分子的数值不也是发生了变化？
