CitiMortgage is preparing to issue its first jumbo mortgage-backed security of the year, a $217.99 million deal largely backed by mortgages originated by brokers. The top contributors to Citigroup Mortgage Loan Trust 2014-J1 are Stearns Lending (33.5 percent), Nationstar Mortgage (30.3 percent) and Freedom Mortgage (11.3 percent). The deal is set to receive AAA ratings from DBRS and Fitch Ratings with credit enhancement of 9.525 percent on the super-senior tranche ...