Issuance of prime jumbo mortgage-backed securities is on the rise but underwriting standards for loans in the deals aren’t changing much, according to a new analysis by Inside Nonconforming Markets. Some $4.23 billion of prime jumbo MBS was issued in the first quarter of 2018, the highest quarterly volume for the sector since the first three months of 2015. Issuers in the sector have largely maintained super-prime underwriting standards since the financial crisis ... [Includes two data charts]