 Hedge fund Citadel, whose flagship portfolio is posting double-digit gains this year, has hired for its investment teams even as many corporations cut staff after the coronavirus outbreak shuttered large parts of the U.S. economy. Chicago-headquartered Citadel, which invests 32 billion, recruited four portfolio managers from other funds for its credit and equity teams, a Citadel spokeswoman said on Wednesday. Michael Gorun and Daniel Shatz will join the credit business in late June, working from New York. 