xyk0730 发表于 2013-7-4 16:10 
谢谢了,我确定了个方向是“线性相关性和尾部相关性对证券组合中VAR的影响”。你看看这个问题怎么研究,能 ...
ok, that's a good topic.
This topic involves the content of copula. So you may first study the copula methodology in financial modeling.
You can choose different copulas to see with is better and compare with other methods either empirically or theoretically.
best,