Boston’s 1 Federal St. sold for $375 million in March, but the commercial market cooled off shortly afterward. Commonwealth National Bank successfully raised its startup capital and opened in Worcester. Luxury homes, such as this one in Concord, lingered longer on the sales market. Trammell Crow Co. hired James F. McCaffrey to head up its investment services operation following the defection of its entire sales team to rival Cushman & Wakefield.