统计研究

• 论文 • 上一篇    下一篇

投资者信息敏感度非对称性与绩差股效应

李腊生等   

  • 出版日期:2016-03-15 发布日期:2016-03-21

The Asymmetry of Investors’ Information Sensitivity and Effect of Bad Performance Stocks

Li Lasheng et al.   

  • Online:2016-03-15 Published:2016-03-21

摘要:

本文以我国股票市场为研究背景,在对上市公司与信息分类的基础上对我国股市中绩差股的投资价值进行了理论分析与实证检验,分析结果表明:在我国股票市场中,投资者对信息的反应具有非对称性特征,这种非对称性不仅表现在同类公司的不同信息上,而且还表现在同类信息对不同的公司上;在上市公司信息公告服从随机游走的条件下,投资者对上市公司反应的非对称性必然导致差公司股票相对于好公司股票更有投资价值;现实证券市场中,选择投资差公司股票的策略不能有效战胜市场的原因在于好公司利好消息比差公司频繁,差公司利空消息比好公司频繁,差公司股票的投资价值由无风险收益、相对风险补偿和信息价值三部分构成,其中信息价值是最为重要的决定变量。

关键词: 信息敏感性, 利好消息, 利空消息, 差公司股票投资价值

Abstract:

Under the backdrop of China’s stock market, this paper theoretically analyzes and empirically tests the investment value of bad performance stocks ,based on the classification of listed companies and information. The result shows that investors’ reaction to the information has the characteristics of asymmetry in China’s stock market, which is manifested not only in the different information of similar companies, but also in the same information for different companies. On the condition that the information announcements of listed companies obey random walk, this asymmetry inevitably causes that the stock of companies with bad performance have more investment value than companies with good performance. In the real stock market, the reason why the strategy to invest the stock of companies with bad performance can not beat the market effectively is that good companies’ good news is more frequent than bad companies’ and bad companies’ bad news is more frequent than good companies’. The investment value of the stock of companies with bad performance consists of three parts, that is, risk-free return, relative risk compensation and information value which is the most important decisive variable.

Key words: Information Sensitivity, Good News, Bad News, Investment Value of Stock of Companies with Bad Performance.