Trading against the grain: When insiders buy high and sell low

Both behavioral biases and informational advantages can drive insider trades. The authors document that US corporate insiders anchor on the 52-week low (high) for stock purchases (sales). They then find that insider trades made when stock prices are far from their anchor levels are more informative, suggesting that when insiders trade against the anchoring bias, private information is providing the catalyst to overcome the bias. The authors further show that outside investors can reap sizeable abnormal returns by piggybacking on insiders who make these buy-high, sell-low trades.