Jim Lieblich, the head of Nomura Holdings Americas commercial mortgage-backed securities group, and a one-time co-head of the firm's fixed-income unit, has left the firm, according to Glitza Rojas, a firm spokeswoman. Lieblich, who oversaw and was president of Nomura Credit and Capital, couldn't be reached for comment. Rojas, in an e-mailed comment, says the departure was due to a "recent restructuring," declining to elaborate further. The division is now headed by Najib Canaan.