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Volume 3,Issue 9

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20 August 2025

投资者彩票偏好与Beta异象——来自中国股市的证据

泽坤 陈1
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1 北京航空航天大学经济管理学院, 中国
© 2025 by the Author. Licensee Art and Design, USA. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC BY-NC 4.0) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

本文基于2005—2025年中国A股市场数据,系统检验了Beta异象的存在性,并从行为金融视角考察投资者彩票偏好对该异象的影响机制。通过构建Dimson-Vasicek修正Beta指标与彩票型收益特征变量(MAX),并采用投资组合分析与时序回归方法进行研究。研究发现:中国股市存在显著且稳健的Beta异象,低Beta组合能够持续获得未被传统资产定价模型解释的正超额收益;同时,投资者对具有极端正收益特征的彩票型股票存在显著偏好,推高其当前价格并导致未来收益被高估。进一步双重排序分析表明,彩票偏好与Beta异象之间存在非单调的交互作用,其在低与高彩票偏好分组中表现尤为显著,而在中间分组作用较弱,说明彩票偏好是影响异象的重要行为机制,但并非唯一驱动因素。本研究为行为资产定价理论提供了来自中国市场的经验证据,对投资策略构建与市场监管也具有参考意义。

Keywords
Beta异象
彩票偏好
资产定价
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