Adena Friedman says that being a black belt in taekwondo has helped her become more fearless in business. The 49-year-old boss of the Nasdaq took up the martial art more than a decade ago ...

Friedman, who also has a black belt in tae kwon do, spoke with Barron's Editor-in-Chief David Cho on the sidelines of the World Economic Forum in Davos, Switzerland. This interview was recorded on ...