Documents have been drawn up to define a deal agent’s responsibilities, a number of firms are willing to be deal agents for new non-agency mortgage-backed securities and some investors insist that the investor-friendly role is necessary. But a deal agent has yet to be included in an MBS. Dmitri Rabin, a vice president of Loomis, Sayles & Company, an investing firm that has pushed the deal-agent concept, conceded that the function doesn’t provide much value in the current environment ...