“Functional psychopaths” make the best investment decisions because they can’t experience emotions such as fear, a study by researchers at Stanford Graduate School of Business showed.

Fear stops people from taking even logical risks, meaning those who have suffered damage to areas of the brain affecting emotions, and can suppress feeling, make better decisions, the report showed. The ability to control emotion helps performance in business and the financial markets, the researchers found.

“Many CEOs and many top lawyers might also share this trait,” a professor of neurology of the University of Iowa, Antoine Bechara, said in a statement on the Stanford Graduate School of Business Web site. The study was carried out by Stanford, Carnegie Mellon University, and the University of Iowa.

The 41 participants in the study were given $20 to play a gambling game. At the beginning of every round, they had to decide whether to risk a $1 stake on a toss of the coin, for a $2.50 return if they won. While any player could decline to take part in a round, the financially “logical” approach to the game was to participate at each stage because the “potential return” outweighed the risk of loss, according to the research.

Fifteen of the players had suffered damage to the areas of the brain that affect emotions. They finished on average $3 richer than the others and invested in 84% of the rounds, compared with 58% played by the rest, who let “fear” govern their decisions, the study showed.