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Do Insider Trading Laws Work?

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  • Arturo Bris

Abstract

By calculating an estimated measure of undetected insider trading, this paper shows that profits made by informed corporate insiders prior to tender offer announcements increase after the first enforcement of insider trading laws. I analyze the effects of Insider Trading regulation on a sample of 5,099 acquisitions in 56 different countries, and estimate the profits due to insider trading from the abnormal volume in the weeks prior to the announcement, under the assumption that insiders purchase those shares at the prevailing price and hold them until the public announcement. I find that laws that prosecute insider trading fail to eliminate profits made by insiders, and make acquisitions more expensive. Therefore, by increasing the market reaction to an acquisition, insider trading laws make it profitable to violate them.

Suggested Citation

  • Arturo Bris, 2000. "Do Insider Trading Laws Work?," Yale School of Management Working Papers ysm162, Yale School of Management, revised 01 Jun 2005.
    • Handle: RePEc:ysm:wpaper:ysm162
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    File URL: https://repec.som.yale.edu/icfpub/publications/2623.pdf
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    Cited by:

    1. Wu, Zekun & Borochin, Paul & Golec, Joseph, 2024. "Informed options trading before FDA drug advisory meetings," Journal of Corporate Finance, Elsevier, vol. 84(C).
    2. Michael R. Veall, 2012. "Top income shares in Canada: recent trends and policy implications," Canadian Journal of Economics, Canadian Economics Association, vol. 45(4), pages 1247-1272, November.
    3. Hillier, David & Korczak, Adriana & Korczak, Piotr, 2015. "The impact of personal attributes on corporate insider trading," Journal of Corporate Finance, Elsevier, vol. 30(C), pages 150-167.
    4. Jan Zabojnik, 2014. "Stock-based Compensation Plans And Employee Incentives," Working Paper 1325, Economics Department, Queen's University.
    5. Jeff Madura & Marek Marciniak, 2014. "Characteristics of takeover targets that trigger insider trading investigations," Applied Financial Economics, Taylor & Francis Journals, vol. 24(1), pages 1-18, January.
    6. Palan, Stefan & Stöckl, Thomas, 2017. "When chasing the offender hurts the victim: The case of insider legislation," Journal of Financial Markets, Elsevier, vol. 35(C), pages 104-129.
    7. Ryu, Doojin & Yang, Heejin & Yu, Jinyoung, 2022. "Insider trading and information asymmetry: Evidence from the Korea Exchange," Emerging Markets Review, Elsevier, vol. 51(PA).
    8. Gębka, Bartosz & Korczak, Adriana & Korczak, Piotr & Traczykowski, Jędrzej, 2017. "Profitability of insider trading in Europe: A performance evaluation approach," Journal of Empirical Finance, Elsevier, vol. 44(C), pages 66-90.
    9. Lin, Chien-Chung & Wu, Huan-Ting, 2019. "How to test an insider trading law and its effectiveness: Price movements and comparative empirical data from Taiwan," International Review of Law and Economics, Elsevier, vol. 57(C), pages 22-36.
    10. David Howden, 2014. "Knowledge flows and insider trading," The Review of Austrian Economics, Springer;Society for the Development of Austrian Economics, vol. 27(1), pages 45-55, March.

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