Freddie Mac is preparing to sell its second “Whole Loan Securities” transaction, according to a presale report from Moody’s Investors Service. The planned $634.64 million deal will be structured like a non-agency mortgage-backed security with senior tranches and subordinate tranches. Unlike the first deal from the government-sponsored enterprise, the planned issuance received ratings on some of the subordinate tranches. The unrated senior ... [Includes three briefs]