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The Dog that Did Not Bark: Insider Trading and Crashes

  • Marín Vigueras, José Maria
  • Olivier, Jacques

This paper documents that at the individual stock level insiders sales peak many months before a large drop in the stock price, while insiders purchases peak only the month before a large jump. We provide a theoretical explanation for this phenomenon based on trading constraints and asymmetric information. A key feature of our theory is that rational uninformed investors may react more strongly to the absence of insider sales than to their presence (the 'dog that did not bark' effect). We test our hypothesis against competing stories such as patterns of insider trading driven by earnings announcement dates, or insiders timing their trades to evade prosecution.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 6244.

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Date of creation: Apr 2007
Date of revision:
Handle: RePEc:cpr:ceprdp:6244
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  1. Devenow, Andrea & Welch, Ivo, 1996. "Rational herding in financial economics," European Economic Review, Elsevier, vol. 40(3-5), pages 603-615, April.
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  15. Chen, Joseph & Hong, Harrison & Stein, Jeremy C., 2001. "Forecasting crashes: trading volume, past returns, and conditional skewness in stock prices," Journal of Financial Economics, Elsevier, vol. 61(3), pages 345-381, September.
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  18. Gerard Gennotte and Hayne Leland., 1989. "Market Liquidity, Hedging and Crashes," Research Program in Finance Working Papers RPF-192, University of California at Berkeley.
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  20. Franklin Allen & Douglas Gale, 1998. "Bubbles and Crises The Economic Journal," Center for Financial Institutions Working Papers 98-01, Wharton School Center for Financial Institutions, University of Pennsylvania.
  21. Sylvain Friederich & Alan Gregory & John Matatko & Ian Tonks, 2002. "Short-run Returns around the Trades of Corporate Insiders on the London Stock Exchange," European Financial Management, European Financial Management Association, vol. 8(1), pages 7-30.
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