Using accounting-based (residual income) valuations, this study examines the extent to which abnormal returns after insider share trades are explained by private information versus mispricing of public information. For a sample of insider trades in the Netherlands (1999- 2008), I find that managers’ share purchase decisions are associated with positive future abnormal returns as well as equity undervaluation. Even though undervaluation results in predictable price increases, positive abnormal returns following purchases persist after controlling for fundamental valuations. Thus, this study provides evidence on the sources of managers’ personal trading gains and suggests that positive abnormal returns after insider share purchases reflect both private information and managers’ responses to market mispricing of public information.

insider training, mispricing, private information, residual income valuation
ERIM Top-Core Articles
The European Accounting Review
Accepted manuscript
Erasmus Research Institute of Management

Veenman, D. (2012). Do Managers Trade on Public or Private Information?. The European Accounting Review, 1–52. Retrieved from