Artificial Intelligence Beats the Markets

WSJ: Letting the Machines Decide

One upstart in the AI race on Wall Street is Rebellion Research, a tiny New York hedge fund with about $7 million in capital that has been using a machine-learning program it developed to invest in stocks. Run by a small team of twentysomething math and computer whizzes, Rebellion has a solid track record, topping the Standard & Poor's 500-stock index by an average of 10% a year, after fees, since its 2007 launch through June, according to people familiar with the fund. Like many hedge funds, its goal is to beat the broader market year after year.

"It's pretty clear that human beings aren't improving," said Spencer Greenberg, 27 years old and the brains behind Rebellion's AI system. "But computers and algorithms are only getting faster and more robust."

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