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The dog that did not bark: Insider trading and crashes

  • José M. Marín
  • Jacques Olivier

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. 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. Finally we provide new evidence regarding crashes and the degree of information asymmetry.

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Paper provided by Department of Economics and Business, Universitat Pompeu Fabra in its series Economics Working Papers with number 948.

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Date of creation: Mar 2006
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Handle: RePEc:upf:upfgen:948
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  1. Leslie A. Jeng & Andrew Metrick & Richard Zeckhauser, 2003. "Estimating the Returns to Insider Trading: A Performance-Evaluation Perspective," The Review of Economics and Statistics, MIT Press, vol. 85(2), pages 453-471, May.
  2. 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.
  3. Jose Marin & Rohit Rahi, 1996. "Information Revelation and Market Incompleteness," Archive Working Papers 024, Birkbeck, Department of Economics, Mathematics & Statistics.
  4. Radner, Roy, 1979. "Rational Expectations Equilibrium: Generic Existence and the Information Revealed by Prices," Econometrica, Econometric Society, vol. 47(3), pages 655-78, May.
  5. Gerard Gennotte and Hayne Leland., 1989. "Market Liquidity, Hedging and Crashes," Research Program in Finance Working Papers RPF-192, University of California at Berkeley.
  6. Stephen Morris & Franklin Allen & Hyun Song Shin, 2004. "Beauty Contests, Bubbles and Iterated Expectations in Asset Markets," Yale School of Management Working Papers ysm346, Yale School of Management.
  7. Devenow, Andrea & Welch, Ivo, 1996. "Rational herding in financial economics," European Economic Review, Elsevier, vol. 40(3-5), pages 603-615, April.
  8. Bhattacharya, U. & Spiegel, M., 1989. "Insiders, Outsiders And Market Breakdowns," Papers fb-_89-20, Columbia - Graduate School of Business.
  9. Meulbroek, Lisa K, 1992. " An Empirical Analysis of Illegal Insider Trading," Journal of Finance, American Finance Association, vol. 47(5), pages 1661-99, December.
  10. Barlevy, Gadi & Veronesi, Pietro, 2003. "Rational panics and stock market crashes," Journal of Economic Theory, Elsevier, vol. 110(2), pages 234-263, June.
  11. H. Henry Cao & Joshua D. Coval & David Hirshleifer, 2002. "Sidelined Investors, Trading-Generated News, and Security Returns," Review of Financial Studies, Society for Financial Studies, vol. 15(2), pages 615-648, March.
  12. 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.
  13. Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
  14. Gary Chamberlain, 1980. "Analysis of Covariance with Qualitative Data," Review of Economic Studies, Oxford University Press, vol. 47(1), pages 225-238.
  15. Harrison Hong & Jose Scheinkman & Wei Xiong, 2005. "Asset Float and Speculative Bubbles," NBER Working Papers 11367, National Bureau of Economic Research, Inc.
  16. David Romer, 1992. "Rational Asset Price Movements Without News," NBER Working Papers 4121, National Bureau of Economic Research, Inc.
  17. Allen F. & Morris S. & Postlewaite A., 1993. "Finite Bubbles with Short Sale Constraints and Asymmetric Information," Journal of Economic Theory, Elsevier, vol. 61(2), pages 206-229, December.
  18. 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.
  19. Suleyman Basak & David Cass & Juan Manuel Licari & Anna Pavlova, 2006. "Multiplicity and Sunspots in General Financial Equilibrium with Portfolio Constraints," PIER Working Paper Archive 06-012, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania.
  20. Harrison Hong & Jeremy C. Stein, 2003. "Differences of Opinion, Short-Sales Constraints, and Market Crashes," Review of Financial Studies, Society for Financial Studies, vol. 16(2), pages 487-525.
  21. Conrad, Jennifer & Kaul, Gautam, 1993. " Long-Term Market Overreaction or Biases in Computed Returns?," Journal of Finance, American Finance Association, vol. 48(1), pages 39-63, March.
  22. Lakonishok, Josef & Lee, Inmoo, 2001. "Are Insider Trades Informative?," Review of Financial Studies, Society for Financial Studies, vol. 14(1), pages 79-111.
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