D. Brian Blank, Mississippi State University and Dallin Alldredge, Florida International University

Corporate insiders who trade stocks based on the information they gain on the job earn a lot more if they work at multinational corporations than their peers at U.S. companies with no sales abroad. That’s the main finding of our new peer-reviewed research.

Insider trading happens when a director or employee trades their company’s public stock or other security based on important or “material” information about that business. Insider trading isn’t illegal as long as the person reports the trade to the Securities and Exchange Commission and the information is already in the public domain.

We wanted to know if multinational insiders stand to make more money because of the complexity of the information they could possess relative to outsiders.

So we examined returns from over 2.5 million trades reported to the SEC from 1987 to 2019 by insiders at over 10,000 companies. This is only a subset of all insider trades reported during the period because we focused on only those transactions most likely to be informed by the employee’s insight. We then compared monthly returns for insiders at multinational and domestic companies with those for a typical investor.

We found that all insiders beat the market, but those at multinationals did better – especially if they were on the highest rungs of the corporate ladder. While insiders at domestic companies typically obtained a return of...

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