Raining Money: the hedge fund founder advises rotating from pricey stocks to cheap ones. : Ray Dalio, the billionaire investor and founder of Bridgewater Associates, the world's largest hedge fund, recommends that investors should come to terms with selling pricier stocks that have had a great run, and reallocate to cheaper equities. And of course, they should "party like crazy," said Dalio in a public Q&A session hosted by social platform Reddit on Thursday. As Dalio put it, "Think about how to rotate your portfolio to buy that which is cheap and sell that which is expensive," he said.