Investor demand for re-performing loans has been so strong in recent months that some firms are sitting on the sidelines as yields have become unattractive. Re-performing loans are being sold both as whole loans and in non-agency MBS, largely without ratings. William Gorin, director and CEO of MFA Financial, said the real estate investment trust has been investing in unrated non-agency MBS backed by re-performing loans that were originated between 2005 and 2007. “The average credit support is...