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中国股票市场过度反应行为:完整牛市和熊市周期中的实证 被引量:7

Overreaction in China Stock Market: Empirical Study in the Whole Bull and Bear Period
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摘要 应用Jegadeesh和Titman的研究方法 ,通过延长不同组合策略的持有期 ,全面考察了中国股票市场短中长期的过度反应现象。时段选取为 1997~ 2 0 0 3年 (一个完整的牛熊周期 ) ,形成期和持有期为 1- 2 4个月。研究结果发现 ,在短期水平上 ,形成期和持有期均为 4~ 6个月的投资组合 ,无论赢家组合还是输家组合都存在一定程度的动量利润 ,赢家组合的动量利润大约为输家组合的 2倍。在 12到 2 4个月的中长期水平上 ,赢家组合与输家组合均表现出比较明显的过度反应现象 (统计检验显著 ) ,反转策略最高可以获取 14 .36 %的超额收益。回归方程检验结果显示中长期水平上不同形成期和持有期的反转策略存在时变风险溢价所不能解释的超额收益。 This paper focuses on overreaction in China stock market with the way of Jegadeesh and Titman by extending the holding period. The forming and holding time is from 1 to 24 months; date from January, 1997 to December, 2003. At the short-term level (from 4 to 6 months), there is a momentum profit for both win portfolio and loss portfolio, while at the long-term level (from 12 to 24 months), overreaction is obvious for both, and contrariant strategies will get 14.36% abnormal return. The regression equation shows that the risk premium hypothesis cannot fully explain the contrariant strategies profits.
作者 梁冰 顾海英
出处 《东北林业大学学报》 CAS CSCD 北大核心 2004年第3期80-82,共3页 Journal of Northeast Forestry University
关键词 过度反应 反转策略 赢家组合 输家组合 风险溢价 Overreaction Contrariant strategies Win portfolio Loss portfolio Risk premium
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参考文献11

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