투자자 관심 수준이 주가표류현상에 미치는 영향
The Effect of Investor Attention on Post-Earnings Announcement Drift
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본 연구는 2005년부터 2017년까지의 개별 기업에 대한 인터넷 검색량 지수(Searching Volume Index, SVI)를 이용하여 투자자 관심 수준을 측정하고 이러한 투자자 관심 수준이 이익공시일 이후 나타나는 주가표류현상에 미치는 영향을 분석하였다. 주요 연구결과는 다음과 같다. 첫째, 투자자 관심 수준이 높을수록 이익공시일 이후 주가표류현상이 유의하게 감소하는 것으로 나타났다. 이러한 결과는 개별 투자자들이 해당 기업에 대한 정보를 보다 적극적으로 수집하고 해석하여 투자 의사결정을 함으로써, 공시이익이 지닌 함축적 의미가 보다 적절히 주가에 반영되어 주가표류현상이 줄어드는 것으로 해석된다. 둘째, 기업규모가 작고 재무분석가가 존재하지 않는 기업의 경우, 투자자 관심 수준과 주가표류현상 간의 음(-)의 관계가 유의하게 나타났다. 이는 상대적으로 외부 투자자들에게 기업에 대한 정보가 덜 공개된 기업일수록 개별 투자자들의 적극적인 정보수집 활동, 즉 투자자 관심 수준이 주가표류현상에 더 큰 영향을 미치는 것으로 해석할 수 있다. 이러한 결과들은 투자자의 관심 수준을 직접적으로 반영한 인터넷 검색량 지수가 주가표류현상에 영향을 미치는 주요한 요인임을 보여주는 동시에 거래량 및 극단적인 주가수익률, 뉴스의 노출빈도 등을 사용하여 간접적으로 투자자 관심 수준을 측정한 선행연구결과와 차별된다.
Abstract
Using the Google searching volume index(SIV) of Korea listed firms from 2004 to 2017, this study investigates the effect of investor attention on post-earnings announcement drift. The main findings are as follows. First, we find that the higher the level of investor attention, the more significantly less the post-earning announcement drift after the earnings disclosure date. It implies that firms are more likely to provide timely the information for earnings to investors because firms with higher investor attention are faced with a high demand for information. When investors have higher attention, individual investors are also more actively collecting and interpreting information about the company’s earnings and timely making investment decisions. Therefore post-earnings announcement drift is reduced. Second, the relationship between investor attention and post-earnings announcement drift is more pronounced when firms have a small size or none of analyst followings. It can be interpreted that the less information about the company is disclosed to investors, the greater the impact of individual investors’ active information searching activities on post-earnings announcement drift. Recently, despite of a growing number of research on the impact of investor attention on the economic and finance literature, it is largely unexplored by the accounting literature. This paper extends to the literature by relating investor attention to post-earnings announcement drift.
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