主管:中国科学院
主办:中国优选法统筹法与经济数学研究会
   中国科学院科技战略咨询研究院

中国管理科学 ›› 2025, Vol. 33 ›› Issue (6): 1-13.doi: 10.16381/j.cnki.issn1003-207x.2022.1247cstr: 32146.14/j.cnki.issn1003-207x.2022.1247

• •    下一篇

过度反应、跳跃收益与A股动量策略

徐龙炳1,2,3(), 吴文彬1   

  1. 1.上海财经大学金融学院,上海 200433
    2.上海财经大学滴水湖高级金融学院,上海 201306
    3.新疆财经大学金融学院,新疆 乌鲁木齐 830012
  • 收稿日期:2022-06-07 修回日期:2023-04-17 出版日期:2025-06-25 发布日期:2025-07-04
  • 通讯作者: 徐龙炳 E-mail:xlb@mail.shufe.edu.cn
  • 基金资助:
    国家自然科学基金项目(72173081);中央高校基本科研业务费专项资金项目(2023110139)

Over-reaction, Jump Return and A-share Momentum Strategy

Longbing Xu1,2,3(), Wenbin Wu1   

  1. 1.School of Finance,Shanghai University of Finance and Economics,Shanghai 200433,China
    2.Dishui Lake Advanced Finance Institute,Shanghai University of Finance and Economics,Shanghai 201306,China
    3.School of Finance,Xinjiang University of Finance and Economics,Urumqi 830012,China
  • Received:2022-06-07 Revised:2023-04-17 Online:2025-06-25 Published:2025-07-04
  • Contact: Longbing Xu E-mail:xlb@mail.shufe.edu.cn

摘要:

已有文献证明A股动量消失的原因是投资者过度反应,但通过双重排序证明动量效应导致其实践可行性有限。本文试图找到能够度量动量效应的单个指标,实现动量效应到动量策略的转变。基于收益分解的框架,本文发现A股市场的跳跃收益体现了投资者反应过度,这不同于美股市场中风险溢价或反应不足的解释。在时序和横截面的横向比较中,跳跃收益能够解释其他过度反应的代理变量,反之则不然。在剥离跳跃收益后,A股市场存在显著的月度动量效应。2008—2019年,基于非跳跃收益构建的市值中性动量多空组合获得0.92%的平均月度收益和1.27%的CH-3模型月度alpha。本文首次分析了A股市场日内股价跳跃的成因,并基于单个指标构建动量策略,在理论和实践两方面做出了贡献。

关键词: 过度反应, 收益分解, 跳跃收益, 动量策略

Abstract:

Existing literature have proved that the disappearance of momentum effect in A-share market is due to the over-reaction of investors, however such strategy construction through double-sorting that uesd in proving leads to its limited practical feasibility.In this paper it tries to find single indicator which can measure momentum effect, and transform momentum effect to momentum strategy.There are many individual investors in A-share market, which is one of the greatest differences between A-share market and other developed market like U.S. stock market. The researches on abnormal trading behavior in A-share market form stock exchanges have shown that individual investors who prefer short-term trading will exacerbate the intraday herd effect and promote stock prices to jump within the day.Based on this fact, daily return is decomposed into two parts: jump return and non-jump return, with the analysis framework of Lou et al. (2019) and intraday jump test of Jiang and Zhu (2017), and then subsequent analysis is conducted. Jump return is discussed from three perspectives: herd effect, fundamental information shock, and investor sentiment. The empirical results show that: (1) jump return is significantly correlated with intraday herd effect, while buying herd effect is positively correlated and selling herd effect is negatively correlated; (2) The PEAD phenomenon mainly comes from non-jump return; (3) Jump return is significantly positively correlated with investor sentiment. Based on the above empirical results, it is concluded that the jump return in A-share market mainly reflects the overreaction of investors, which is different from the explanation of risk premium or under-reaction in U.S. stock market.In the horizontal comparison of time series and cross-sectional, jump return can explain other overreaction proxy variables, but not vice versa. After eliminating the jump return, there is a significant monthly momentum effect in A-share market. From 2008 to 2019, the size neutral momentum long-short portfolio based on non-jump return achieved an average monthly return of 0.92% and 1.27% monthly alpha of the CH-3 model.The causes of intraday stock price jump in A-share market are analyzed for the first time, and momentum strategy is constructed with single indicator, that contributes both in the theroy and practice.

Key words: over-reaction, return decomposition, jump return, momentum strategy

中图分类号: