‘Flash Boys’ Hero Is Picking a Fight With Hedge Fund Citadel

  • Both sides mobilize executives to try to sway Congress and SEC
  • Flap hinges on whether a speedbump helps, or hurts, investors

Brad Katsuyama and his Investors’ Exchange were lionized in the best-selling book “Flash Boys” as protecting mom-and-pop investors from predatory high-frequency traders.

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