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Are Insiders' Trades Informative?

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Author Info
Josef Lakonishok
Inmoo Lee
Abstract

We document insider trading activities of all companies listed on the NYSE, Amex, and Nasdaq exchanges during the 1975-1995 period. Insider trading is common, and in more than half the sample firms, there is at least some insider activity in a given year. In general, very little market movement is observed when insiders trade and when they report their trades to the SEC. Insiders in aggregate are contrarian investors. However, they predict market movements better than simple contrarian strategies. Insiders also seem to be able to predict cross-sectional stock returns. The result, however, is driven by insider's ability to predict returns in smaller firms. In addition, insider purchases are more informative than insider sales.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 6656.

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Date of creation: Jul 1998
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Handle: RePEc:nbr:nberwo:6656

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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Newey, Whitney K & West, Kenneth D, 1987. "A Simple, Positive Semi-definite, Heteroskedasticity and Autocorrelation Consistent Covariance Matrix," Econometrica, Econometric Society, vol. 55(3), pages 703-08, May. [Downloadable!] (restricted)
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  2. Kothari, S. P. & Warner, Jerold B., 1997. "Measuring long-horizon security price performance," Journal of Financial Economics, Elsevier, vol. 43(3), pages 301-339, March. [Downloadable!] (restricted)
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  4. Ikenberry, David L. & Rankine, Graeme & Stice, Earl K., 1996. "What Do Stock Splits Really Signal?," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 31(03), pages 357-375, September. [Downloadable!]
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  9. Ikenberry, David & Lakonishok, Josef & Vermaelen, Theo, 1995. "Market underreaction to open market share repurchases," Journal of Financial Economics, Elsevier, vol. 39(2-3), pages 181-208. [Downloadable!] (restricted)
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  10. De Bondt, Werner F M & Thaler, Richard, 1985. " Does the Stock Market Overreact?," Journal of Finance, American Finance Association, vol. 40(3), pages 793-805, July. [Downloadable!] (restricted)
  11. Chan, Louis K C & Lakonishok, Josef, 1995. " The Behavior of Stock Prices around Institutional Trades," Journal of Finance, American Finance Association, vol. 50(4), pages 1147-74, September. [Downloadable!] (restricted)
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  13. Josef Lakonishok & Robert W. Vishny & Andrei Shleifer, 1993. "Contrarian Investment, Extrapolation, and Risk," NBER Working Papers 4360, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  14. Fama, Eugene F. & French, Kenneth R., 1993. "Common risk factors in the returns on stocks and bonds," Journal of Financial Economics, Elsevier, vol. 33(1), pages 3-56, February. [Downloadable!] (restricted)
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  16. Lee, Inmoo, 1997. " Do Firms Knowingly Sell Overvalued Equity?," Journal of Finance, American Finance Association, vol. 52(4), pages 1439-66, September. [Downloadable!] (restricted)
  17. 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. [Downloadable!] (restricted)
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  19. Fama, Eugene F & French, Kenneth R, 1988. "Permanent and Temporary Components of Stock Prices," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 246-73, April. [Downloadable!] (restricted)
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  21. Lee, Inmoo & Loughran, Tim, 1998. "Performance following convertible bond issuance," Journal of Corporate Finance, Elsevier, vol. 4(2), pages 185-207, June. [Downloadable!] (restricted)
  22. Chopra, Navin & Lakonishok, Josef & Ritter, Jay R., 1992. "Measuring abnormal performance : Do stocks overreact?," Journal of Financial Economics, Elsevier, vol. 31(2), pages 235-268, April. [Downloadable!] (restricted)
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  1. Leslie A. Jeng & Andrew Metrick & Richard Zeckhauser, . "Estimating the Returns to Insider Trading," Rodney L. White Center for Financial Research Working Papers 19-99, Wharton School Rodney L. White Center for Financial Research. [Downloadable!]
  2. Leslie A. Jeng & Andrew Metrick & Richard Zeckhauser, 1999. "The Profits to Insider Trading: A Performance-Evaluation Perspective," NBER Working Papers 6913, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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