But there were limits to how socially off-putting a trader could be at Jane Street. Sam had tested them. After his summer internship, he’d set out to address his superiors’ criticisms. He’d long since realized that his inability to convey emotion created a distance between himself and others. Just because he didn’t feel the emotion didn’t mean he couldn’t convey it. He’d started with his facial expressions. He practiced forcing his mouth and eyes to move in ways they didn’t naturally. “It’s not totally trivial to fake things,” he said. “It was physically painful. It felt unnatural. And I
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