Andreas Christopolous and David McNamara are no longer with J.P. Morgan Chase's CMBS team. The departures were said to be merger-related. Christopolous was Chase's director of commercial mortgage research and had worked at the firm since August 1997. McNamara, a CMBS trader, had been with Chase for four and a half years. Market sources said that after the merger of J.P. Morgan and Chase, Christopolous had been offered a position in product management, but really wanted to continue in research-related work. He left the firm last Tuesday. Christopolous has no specific plans but is considering options including buyside, sellside or development consulting work. Brian Baker, head of JPMC's trading desk, declined to comment on the departures.