Although Redwood Trust’s soup-to-nuts approach to representations and warranties has dominated the fledgling recovery in jumbo mortgage-backed securities issuance, some experts think a shorter term alternative may gain popularity among issuers. It’s important for investors and rating services to anticipate putbacks in jumbo MBS, Peter Sack, a managing director at Credit Suisse, said during a panel session at the recent secondary market conference sponsored by the Mortgage Bankers Association ...