The power of firm fundamental information in explaining stock returns

The power of firm fundamental information in explaining stock returns
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公司基本信息在解释股票收益方面的力量

DOI:
10.2139/ssrn.3090626
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发表时间:
2017-12
影响因子:
4.2
通讯作者:
Frank Zhang
Frank Zhang
中科院分区:
管理学3区
文献类型:
--
作者:
Shuai Shao;Robert Stoumbos;Frank Zhang

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文献表明,随着时间的推移,盈利已经越来越少地解释股票价格的波动,这表明公司的基本面信息已经变得不那么重要。在本文中,我们用盈利公告回报率代替盈利作为衡量公司基本面消息的指标,发现这些公司基本面已经开始解释更多的价格波动。在2003年之后的几年里,盈利公告回报率解释了大约20%的年度回报率几乎是以前的两倍,这表明基本面信息在解释股票回报率方面变得更加重要,而不是更少。其他形式的公司基本面信息也会出现这种模式。总的来说,收益公告、管理层指导、分析师预测、分析师建议和8-K申报的回报率从20世纪90年代末平均占年回报率的17%上升到21世纪10年代初的39%。在探索基本信息解释力增加的可能解释时,我们发现了与监管变化一致的证据,例如新的8-K申报要求和萨班斯-奥克斯利法案,共同使披露更具信息性。
The literature shows that earnings have come to explain less stock price movement over time, suggesting that firm fundamental information has become less important. In this paper, we replace earnings with earnings announcement returns as a measure of firm fundamental news and find that these firm fundamentals have come to explain more price movement over time. In the years after 2003, earnings announcement returns explain roughly 20% of the annual return—almost twice as much as they did before, indicating that fundamental information has become more important, not less, in explaining stock returns. This pattern occurs for other forms of firm fundamental information. Collectively, the returns around earnings announcements, management guidance, analyst forecasts, analyst recommendations, and 8-K filings went from explaining 17% of annual returns on average in the late 1990s to 39% on average in the early 2010s. In exploring possible explanations for the increase in the explanatory power of fundamental information, we find evidence consistent with regulatory changes, such as new 8-K filing requirements and Sarbanes-Oxley, collectively making disclosures more informative.
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