...数的Q-Q图,图中表明两指数分布具有厚尾特征,表明相对正态分布而言,两指数收益率的分布具有尖峰厚尾(Leptokurtosis and Fat-Tail)特征这象征着在样本数据内两指数收益率很多样本值较大幅度地偏离样本平均值
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实证结果表明：我国股价波动具有尖峰厚尾特征、异方差性特征和波动的持续性和非对称特征；
My results show that there are significantly volatility, excess kurtosis and heteroskedasticity, persistence and asymmetric effect in Chinese Stock Market.
对期货价格数据进行统计分析，发现期货价格具有“尖峰厚尾”特性。
Secondly, carrying on the statistical analysis to the forward price data, discovered the future price data has the intense ARCH effect.
通过对沪铜收益率时间序列特征的分析发现，沪铜收益率时间序列存在尖峰厚尾性和波动集群性，并具有明显的ARCH效应。
Through the analysis of copper time series' characteristics, we found that copper yield rate time series had peak fat-tail characteristic, volatility clustering characteristic and obvious ARCH effect.
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