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Are Insiders' Trades Informative?

Open access
Lakonishok, Josef, Lee, Inmoo·1998·National Bureau of Economic Research

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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Metadata

Authors
Lakonishok, J., & Lee, I.
Venue
National Bureau of Economic Research
Published
1998-07
OpenAlex
W2023580640
Cited by
235
References
1
Type
report
Language
en
Open access
green

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CoChat. (2026). Citation check: Are Insiders' Trades Informative? https://app.cochat.ai/papers/10.3386/w6656
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Lakonishok, J., & Lee, I. (1998). Are Insiders' Trades Informative? National Bureau of Economic Research. https://doi.org/10.3386/w6656

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