具体要求如下:
1. select five stocks . (example IBM, MMM, DIS, GE, and so on...)
2. find historical return (5years or 10years) of those five stocks (See Yahoo Finance).
3. estimate marginal distribution of each stock-returns using "Kernel smoothing density estimate" (See ksdensity in Matlab 7.9)
4. estimate covariance metrics and estimate t-copula parameters (See copulafit in Matlab 7.9)
5. calculate 1% and 5% VaR using above results with MCS (See also copularnd in Matlab)
6. compare your VaR with t-copula to the VaR with covariance metrics.