Are Insiders' Trades Informative?
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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
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美国国家经济研究局创建时间：
1998-07-01
