Underwriting trends for jumbo mortgage-backed securities were mixed as of the third quarter of 2014, according to an analysis by Inside Nonconforming Markets. While some issuers started to include mortgages with higher loan-to-value ratios, average combined LTV ratios in jumbo MBS were actually higher for deals issued in the fourth quarter of 2013 than those priced in the third quarter of 2014. Average credit scores on issuance for the third quarter were ... [Includes one data chart]