William C. Carey is the new president of Boston-based Fidelity...

William C. Carey is the new president of Boston-based Fidelity Institutional Retirement Services Co., Fidelity's 401(k) plan business. He succeeds Joseph P. LoRusso, who was named president of Fidelity Investments Institutional Services Co. last year. Mr. Carey had been executive vice president of Fidelity's emerging corporate market group. Robert Hunter will head up Fidelity's emerging corporate market group on an interim basis until a permanent replacement is named.