问题
单项选择题
An analyst does research about common probability distributions. Compared to a normal distribution, a return distribution with negative excess kurtosis most likely has :()
A. more extreme outcomes.
B. less observations clustered around the mean.
C. a longer tail on the left side than on the right side.
答案
参考答案:B
解析:
本题考查的是对偏度(skewness)和峰度(kurtosis)的基本理解。如果收益率分布是比正态分布要尖峰的话,那么一般是厚尾,有更多的观察值分布在均值附近;如果比正态分布要扁峰的话,那么一般是薄尾,有更少的观察值分布在均值附近,同时有更少的极大或极小值。左边或右边厚尾与偏度有关。