题目
It is often said that distributions of returns from financial instruments are leptokurtic. For such distributions, which of the following comparisons with a normal distribution of the same mean and variance MUST hold?
选项
A.The skewness of the leptokurtic distribution is greater.
B.The kurtosis of the leptokurtic distribution is greater.
C.The skewness of the leptokurtic distribution is smaller.
D.The kurtosis of the leptokurtic distribution is smaller.
答案
B
解析
A leptokurtic distribution is characterized as having fat tails. Kurtosis is a measurement of the flatness of a distribution, or how fat its tails are. A distribution with a higher kurtosis has fatter tails. 尖峰型分布的特征是有肥尾巴。峰度是测量分布的平坦度，或者它的尾巴有多胖。峰度较高的分布有较胖的尾巴。