A negatively skewed distribution is characterized by many small gains and a few extreme losses. Note that kurtosis is a measure of the peakedness of a return distribution.

在negatively skewed distribution中 mean<median<mode，仿佛不符合many small gains and a few extreme losses的说法，怎么理解？

kurtosis is a measure of the peakedness of a return distribution。怎讲？

negatively skewed distribution指的是在左侧有大的损失，mean<median<mode的话是可以证明的

kurtosis is a measure of the peakedness of a return distribution。

kurtosis 是用来衡量尖峰的程度，与正态分布进行比较的，是变量的四阶矩，你看一下其定义。