Harvard study shows AI stock trading rivals many picks made by fund managers

Some bad news for all the mutual fund managers out there: A new study from researchers at Harvard Business School seems to support the fear that artificial intelligence and machine learning could do their jobs. But here’s the catch—with only about 71% accuracy, depending on how predictable their trades are.

The working paper “Mimicking Finance” from Lauren Cohen, Yiwen Lu, and Quoc H. Nguyen, published this month by the National Bureau of Economic Research, finds “that 71% of mutual...