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Insider trading and information asymmetry: Evidence from the Korea Exchange

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  • Ryu, Doojin
  • Yang, Heejin
  • Yu, Jinyoung

Abstract

This study examines whether pre-announcement insider trading significantly resolves or intensifies information asymmetry in the Korean emerging stock market. Local institutions are the most informed and trade in the right direction before analyst report announcements. Such insider trading increases post-announcement information asymmetry or adverse selection costs. Notably, local retail investors' trading behavior synchronizes with that of local institutions after pre-announcement insider trading.

Suggested Citation

  • Ryu, Doojin & Yang, Heejin & Yu, Jinyoung, 2022. "Insider trading and information asymmetry: Evidence from the Korea Exchange," Emerging Markets Review, Elsevier, vol. 51(PA).
    • Handle: RePEc:eee:ememar:v:51:y:2022:i:pa:s1566014121000558
    DOI: 10.1016/j.ememar.2021.100847
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    2. Doojin Ryu & Robert I. Webb & Jinyoung Yu, 2023. "Who pays the liquidity cost? Central bank announcements and adverse selection," Journal of Futures Markets, John Wiley & Sons, Ltd., vol. 43(7), pages 904-924, July.

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    More about this item

    Keywords

    Adverse selection; Analyst report; Difference-in-differences; Emerging stock market; Information asymmetry; Insider trading;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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