Mike Hyland has taken over as head of high-yield research at Bear Stearns, according to BW sister publication TeleTech Financing Week. Hyland, who joins from Invesco Funds, is taking over for Paul Greenberg, who announced his resignation about two weeks ago (BW, 7/2). Greenberg left the firm to start a hedge fund. Hyland will report to Warren Spector, the head of Bear Stearn's fixed-income division. Calls to Spector and Hyland were not returned at press time. A spokeswoman for Invesco did not return calls at press time.