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The cover of Flash Boys, by Michael Lewis, examines the impact of high-frequency trading.
The cover of Flash Boys, by Michael Lewis, examines the impact of high-frequency trading.
(PATRICIAL WALL/NYT)

Flash Boys’ Mr. Katsuyama goes to Washington

Think of it as the day when Flash Boys came to Washington.

Brad Katsuyama, the Canadian hero of the Michael Lewis bestseller, was one of six witnesses who testified on Tuesday before a congressional subcommittee. Its goal: To investigate some of the book’s claims about the less savoury aspects of high-frequency trading – or whether, as Mr. Lewis put it on national television, “the stock market’s rigged.”