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Market Reaction for KRX SRI Index Revision

KRX SRI Index 구성종목 신규편입 시점의 주가반응에 관한 연구

  • Hwang, Seong-Jun (Dept. of Business Administration, Pusan National University) ;
  • Kim, Dong-Il (Dept. of Business Administration, Pusan National University)
  • Received : 2016.01.05
  • Accepted : 2016.03.03
  • Published : 2016.03.31

Abstract

In today's fast-paced capitalistic society, a primary concern is whether to invest capital in any way to increase profits. In recent years, many companies have emphasized ethics and practiced corporate social responsibility activities. These activities are not only required to have at the end of the company. Bringing the ultimate goal of profit maximization is one way to contribute to the development of society and the economy. Investors are aware of corporate social responsibility activities and have begun to reflect this in their investments. We studied the behavior of a newly incorporated company's stock price on the KRX SRI Index using a scale that indicates the level of social responsibility for companies in the domestic stock market. Socially responsible investment involves an excellent company that looks out and looks for additional effects on the stock price of imports and improves the reliability of investors through an event study. The results show that the company we examined has a positive impact on the market. This study confirms the hypothesis that additional stock market reaction will occur when superior companies are newly incorporated in the KRX SRI Index and gain investors' trust. The results demonstrate that becoming a newly incorporated corporation in the KRX SRI Index is positive information to investors.

오늘날 급변하는 자본주의 사회에서는 어떠한 방법으로 자본투자를 하는 것이 더 많은 이익을 가져다 줄 것인지에 대한 관심이 높아지고 있다. 이러한 상황속에서 최근에는 기업의 윤리경영이 강조되면서 많은 기업들이 사회적 책임 활동을 실천해오고 있다. 이런 활동들이 단지 기업이 가져야할 의무에만 그치는 것이 아니라 기업의 궁극적인 목표인 이윤 극대화를 가져오고 사회와 경제의 발전에 기여하기 위한 방법이기도 하다. 또한 투자자들도 기업의 사회적 책임 활동에 대해 인식하고 투자에 반영하기 시작하였다. 본 연구에서는 국내의 자본시장에서 기업의 사회적 책임 투자의 수준을 나타내는 지수인 KRX SRI Index(사회책임투자지수)를 이용하여 KRX SRI Index에 신규로 편입된 기업의 주가행태를 연구해 해보고, 사회적 책임 투자가 우수한 기업이 투자자의 신뢰성 향상을 가져와 주가에 추가적인 효과가 나타나는지를 사건연구(Event Study)를 통해서 알아보고자 한다. 사건연구를 위해 비사건 기간을 사건일 전 120일간으로 설정하였고, 사건기간은 사건일 전 2일에서 사건일 후 2일까지 총 5일간으로 설정하여 연구를 진행하였다. 주요 실증분석 결과, 사회책임투자지수에 신규 편입은 시장에 긍정적인 영향을 미치는 것으로 나타났다. 신규편입 공시일 전 후로 비정상수익률이 유의한 양(+)의 값을 보여주었다. 또한 공시시점 이후로 연속적으로 누적평균비정상수익이 상승하고 있음을 확인 할 수 있었다. 이러한 결과는 투자자들의 투자 판단 기준으로서 KRX SRI Index 편입 여부가 관련성 있는 정보로서의 역할을 하고 있음을 확인해 볼 수 있었다.

Keywords

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