One Year Later, Reflecting On Flash Boys

When I sat down to write Flash Boys, in 2013, I didn’t intend to see just how angry I could make the richest people on Wall Street. I was far more interested in the characters and the situation in which they found themselves. Led by an obscure 35-year-old trader at the Royal Bank of Canada named Brad Katsuyama, they were all well-regarded professionals in the U.S. stock market. The situation was that they no longer understood that market. And their ignorance was forgivable. It would have been difficult to find anyone, circa 2009, able to give you an honest account of the inner workings of the American stock market—by then fully automated, spectacularly fragmented, and complicated beyond belief by possibly well-intentioned regulators and less well-intentioned insiders. That the American stock market had become a mystery struck me as interesting. How does that happen? And who benefits?