According to statistical analysis on Shanghai stock index, the distribution of the rate of return is non-positive skewed, and there exists an autoregressive heteroskedasticity in the rate of return.
通过对上证指数的统计分析表明，上证指数的收益率分布表现出非正态性，并存在自回归条件异方差的特征。
The positive results represent the right skewed distribution.
得出积极成果表示右偏态分布。
The positive results represent the right skewed distribution.
得出积极成果表示右偏态分布。
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