Financial risks of global main stock indexes before and after financial crisis: An empirical study based on t-distribution
金融危机前后世界主要股票指数的金融风险:基于t分布的实证研究

This research selected 28 main stock indexes of the world as a sample,in which the year of 2004-2006 was viewed as stable period,and the year of 2007-2009 was viewed as crisis period.The probability density distributions of daily logarithmic returns were fitted with normal distribution curves and t-distribution curves,calculated with the number of freedom degrees v and scale parameter b.The Kolmogorov-Smirnov test shows that i-distribution fits the data better than normal distribution.The investigation show...