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For His Next Trick, Barefoot Genius Aims to End Broker Rip-Offs

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The man who helped revolutionize high-frequency trading greets guests to his Paris office in his bare feet.

“I apologize for not dressing up,” said Stephane Tyc, 54, whose scheme to send trade data via microwave towers in the U.S. and Europe has paid off for his company, McKay Brothers International SA, and its flash-boy customers. “I wish I’d known you were going to wear a tie.”