He left RBC in 2012 to co-found IEX under the premise that it would be a fairer stock trading venue than other exchanges.
[2] Through his work with IEX, Katsuyama is featured in Flash Boys,[3] a 2014 non-fiction book by Michael Lewis about high-frequency trading (HFT) in the financial markets.
[6] Katsuyama left RBC in 2012 to start what he considered to be a fairer stock trading venue, the Investors Exchange IEX.
Since the publishing of Flash Boys and the opening of IEX, several U.S. authorities have confirmed they are looking into certain practices used by high-frequency traders.
The FBI, the U.S. Securities and Exchange Commission, the U.S. Justice Department and the Attorney General of New York State all have investigations underway.