Brad Katsuyama was mystified. A Royal Bank of Canada trader whom RBC sent from Bay Street to Wall Street – where he met “more offensive people in a year than I had in my entire life,” he told writer Michael Lewis – Katsuyama discovered a strange thing: staring at his screen, and deciding to buy a stock, he'd hit “Enter,” and presto, in that moment the shares vanished. But they'd pop up a penny or two higher.
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