Sophisticated investors and market efficiency: Evidence from a natural experiment

• 成果类型: Article
• 署名作者: Chen, Yong; Kelly, Bryan; Wu, Wei
• 署名单位: Texas A&M University System; Texas A&M University College Station; Mays Business School; Yale University; National Bureau of Economic Research
• 刊物名称: JOURNAL OF FINANCIAL ECONOMICS
• ISSN/ISSBN: 0304-405X
• DOI: 10.1016/j.jfineco.2020.06.004
• 发表日期: 2020
• 页码: 316-341
• 关键词: HEDGE FUNDS; Information environment; market efficiency; information acquisition; ANALYST COVERAGE

摘要

We study how sophisticated investors, when faced with shocks to information environ-ment, change their information acquisition and trading behavior, and how these changes in turn affect market efficiency. We find that, after exogenous reductions of analyst coverage due to closures and mergers of brokerage firms, hedge funds scale up information acquisition, trade more aggressively, and earn higher abnormal returns on the affected stocks. The hedge fund participation also mitigates the impairment of market efficiency caused by coverage reductions. Overall, in a causal framework, our findings suggest a substitution effect between sophisticated investors and public information providers in facilitating market efficiency. (C) 2020 Elsevier B.V. All rights reserved.