Clayton Holdings was rated as a deal agent for non-agency mortgage-backed securities last week. The rating by Morningstar Credit Ratings was the first formal assessment of a deal agent, a role aimed at improving protections for investors in new non-agency MBS. Morningstar also assessed Clayton as a representation-and-warranty reviewer, assigning ratings of MOR RV2 for both functions. The firm’s rating scale ranges from RV1 to RV4 and Morningstar said it is the only ...