Rating services and due-diligence firms have plenty of time to analyze originators of jumbo mortgages headed to the securitization market, according to industry experts speaking this week at the Mortgage Bankers Association’s annual Secondary Market Conference in New York. All the rating services are putting greater emphasis on understanding originator business practices as part of evaluating jumbo mortgage-backed securities deals, said Sharif Mahdavian, an analyst at Standard & Poor’s ...