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Which institutions matter to short-term market efficiency in Japan?

By Anxing Wang, Jimei Zhou and Tao Chen

Abstract

Recent work suggests that institutional investors play an important role in short-term market efficiency. This study provides new evidence for the prevalence of this efficiency-enhancing effect by categorizing institutions into different types: foreign institutions, financial institutions, securities companies, government and regional public authorities, and other institutions. Looking at the Japanese market, we find that the presence of institutional investors, financial institutions in particular, improves the information environment. With respect to foreign institutions, this efficiency-enhancing effect is most clearly seen in trading costs and order imbalances. Robustness checks confirm that our findings are not driven by the endogeneity and time variation of ownership structure.Market efficiency Institutional ownership Japan

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