Angel Oak Capital Advisors is preparing to issue its first non-agency mortgage-backed security of the year backed by non-qualified mortgages, according to documents filed with the Securities and Exchange Commission. Tiptree has an agreement to sell jumbo lender Luxury Mortgage in the second half of this year. The buyer and purchase price weren’t disclosed. Citadel Servicing recently loosened underwriting standards on a number of its nonprime ... [Includes four briefs]