With overall production levels falling, there was a modest increase in several risk vectors of FHA and VA loans pooled in Ginnie Mae mortgage-backed securities during the first quarter of 2018.A new Inside FHA/VA Lending analysis shows the average credit score for FHA loans in Ginnie MBS issued during the first quarter was 671.1, the lowest level since Ginnie began reporting loan-level data on its securities. That was down from 673.2 in the fourth quarter and 679.2 a year ago. Part of the slide in FHA credit scores likely reflects the increased share of purchase mortgages, which typically have lower scores than refinance loans. The same thing happened in the VA market, where average credit scores fell 1.1 points to 707.8 in the first quarter. A year ago, the average VA score was 710.2. Debt-to-income ratios also drifted higher, suggesting more risk of default. Among FHA loans, the average DTI rose to ... [Charts]