Does Legal Know-How Change How Executives Trade?
Insiders with legal training earn less on their own-firm purchases than other insiders, evidence of lawyers trading more conservatively.
Insider trading law is famously gray. Insiders may trade their own company's stock, but not on material non-public information, and the line between the two has been contested for decades. Who should understand that line best? Executives and directors trained as lawyers.
The study finds that lawyer-insiders earn significantly lower abnormal returns than other insiders when they purchase their own company's shares. Their purchases precede weaker earnings surprises and profitability than the purchases of non-lawyer insiders, and their trading becomes even more muted in the months after heavy SEC enforcement activity.
In other words, the insiders best equipped to know where the legal line sits appear to stay furthest from it, exploiting private information more conservatively rather than more cleverly.
The result also reframes a common assumption in governance research, that all executives understand the rules equally well. Legal sophistication is unevenly distributed across the C-suite, and it shows up in trading behavior.
The Takeaway
Legal training restrains rather than sharpens insider trading. Lawyer-insiders profit less on their purchases and respond more to enforcement.