一篇2003年的老文章 http://www.indexfunds.com/articles/20030808_Risk.htm
Variations on Standard Deviation
Skewness & Kurtosis
The Risk of Taking Risk
Tracking Error Risk
The Risk of Abandoning the Plan
Risk is Real
The Risk of the Maverick
The Risk of a Short-Term Outlook
The “Bearer of Bad Tidings” Risk