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投资偏好与“特质波动率之谜”——以中国股票市场A股为研究对象

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Keywords: 资产定价,特质风险,投资偏好,价格极差

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Abstract:

?与价格走势平平的股票相比,投资者更愿意选择过去价格变化幅度较大的股票。这种投资偏好是否是产生“特质波动率之谜”的原因呢?本文以中国股票市场A股为研究对象,首先验证中国股票市场“特质波动率之谜”的存在性。随后组合分析和Fama-MacBeth横截面回归分析发现,价格极差可以在一定程度上解释但不能完全解释“特质波动率之谜”。横截面回归结果表明,在价格极差、最大日收益率、换手率三者的共同作用下,特质波动率与股票预期收益之间的负向关系不再显著。由此,对某些特殊股票的投资偏好可能是产生“特质波动率之谜”的主要原因。

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