Washington, D.C. ? The length of a man’s ring finger may predict his success as a financial trader.

Researchers at the University of Cambridge in England report that men with longer ring fingers, compared to their index fingers, tended to be more successful in the frantic high-frequency trading in the London financial district.

Indeed, the impact of biology on success was about equal to years of experience at the job, the team led by physiologist John M. Coates reports in Monday’s edition of Proceedings of the National Academy of Sciences.