Artificial intelligence is making it easier for Main Street investors to emulate the investment portfolios of Wall Street titans like Warren Buffett, Cathie Wood, and Ray Dalio. “So-called mirrored trading is a strategy worth following, especially since the most successful investors such as Warren Buffett tend to hold concentrated portfolios with little turnover,” said David I. Kass, a finance professor at the University of Maryland, Robert H. Smith School of Business. Still, it’s worth knowing what pick ...