As the entire test series are not subject to normal distribution and highly relevant, use two group of related non-parameters Wilcoxon symbols test, to test two kind of strategy.

• 由于各组的检验期的收益率序列均不服从正态分布并且有很强的相关性，因此采用两组相关样本非参数Wilcoxon 符号秩检验法对执行惯性策略和反转策略的两组投资组合进行了检验。