Hatteras Financial is working to issue a jumbo mortgage-backed security backed by adjustable-rate mortgages. The real estate investment trust has acquired more than $275 million in jumbo ARMs since launching its conduit operations last year. The planned jumbo MBS from Hatteras is Onslow Bay Mortgage Loan Trust 2015-1, according to documents filed with the Securities and Exchange Commission last week. The REIT’s conduit operates as Onslow Bay Financial ...