IEX CEO Brad Katsuyama talks about disrupting Wall Street and the power of 'Flash Boys' on the upsta

Brad Katsuyama, the CEO of upstart stock exchange IEX, didn't realize how hard disrupting Wall Street would be. Katsuyama, who came to prominence as the star of Michael Lewis' 2014 best-selling " Flash Boys," said without the book, "I’m not sure if I’m sitting here for a stock exchange right now."  Katsuyama spoke on Tuesday at Business Insider's IGNITION 2018 conference.  Disrupting Wall Street is hard. Brad Katsuyama, the CEO of upstart stock exchange IEX, just didn't realize how...