The interest-rate spread between non-agency jumbo mortgages and conforming mortgages is much closer than average interest rates suggest, according to an analysis by CoreLogic. During the second quarter of 2018, the average interest rate on a 30-year fixed-rate jumbo mortgage was 33 basis points lower than the average rate for a conforming mortgage, according to CoreLogic. Archana Pradhan, a senior professional economist at CoreLogic, noted that the averages present a skewed view of ...