问题
单项选择题
Assume a stock index consists of many firms who have recently split their stock. Which of the following weighting schemes will see a bias due to the impact of stock splits（）
A. Unweighted price series.
B. Standard and Poor's 500 Index.
C. Price-weighted series.
答案
参考答案：C
解析：
Firms that split their stock price will have the identical weight before and after the split in both the unweighted and the market value-weighted series. However, in the price-weighted series, large successful firms will lose weight within the index due to simply splitting their stock. This creates a downward bias in a price-weighted series. Standard and Poor's 500 Index is a market valueweighted index.