机构地区: 清华大学经济管理学院
出 处: 《证券市场导报》 2013年第7期36-43,共8页
摘 要: 本文使用2009年1月1日至2010年12月31日的50000余份行业研究报告,以中国A股1475家公司24167个收到研究报告的事件日为对象,通过实证研究发现:(1)分析师撰写的研报具有显著的信息含量,研报评级越高、分析师名气越大、分析师所在券商的名气越大,投资者根据其研报买卖股票获得的超额收益越高,但明星券商的作用局限于短期;(2)信息不对称会影响研报的作用,研报涉及的公司信息越对称,分析师的评级作用会显著降低。 Studied about 50000 industry research reports between January 1, 2009 and December 31, 2010, using 24167 research report received events from 147 listed A-share companies as date, this paper found: (1) Analysts have predictive abilities. Higher rating level, star analysts' and star brokers' recommendations bring about positive market reactions. Star analysts or brokers' ratings are more effective. But star analysts' influence is significantly important only in the short term; (2) When information becomes more symmetrical, the CAR (Cumulative Abnormal Return) reduces simultaneously. Analysts are of importance in eliminating information asymmetry.