개인투자자의 레버리지 거래가 주식시장에 미치는 영향

In general, individual investors are considered as the irrational investment, high frequent turnover and bad investments. However, in the same individual investors, some are better than others due to investment size or special strategies. This study is focus on the leverage trading by individual investors and compare their investment strategies and impacts on the market, comparing with general individual investors. Our major findings are as follow. First, general individuals show the positive feedback trading, but leveraged individuals show the negative feedback trading. Second, after the buy by the general individuals, stock returns are decreased, but stock prices are increased consistently after the credit trading and decreased after the short selling. Third, trades by general individuals make an different impact on the KOSPI market and KOSDAQ market, but the credit trade and the short selling by the leveraged individuals make the same impact on both market, especially, they reduce the volatility of all markets. However, their impact on the liquidity is trivial. Although they are in the same investor group, they can be different investors if classified by the something. This study shows that the leverage trades can be something. In addition, this is the major contribution of this study that it show that the same investors can be different so the within analysis on one investor group deserve to be good researches. This study suggest academically, the differential approach to individual investors and practically, the respective treatment on leverage trades.