Collateral Misreporting in the RMBS Market
60 Pages Posted: 24 Aug 2017
Date Written: August 21, 2017
We identify collateral misreporting by comparing non-agency securitized residential mortgage appraisals to automated valuation model (AVM) valuations and purchase prices. Appraisals exceed AVM valuations 60% of the time and are biased upward by an average of almost 5% relative to AVM valuations. For purchase loans, appraisals cluster at and slightly above purchase prices and virtually never fall below purchase prices. This indicates that half of purchase loan appraisals are biased upward, and average appraisal bias is even larger for refinance loans. Appraisal bias is correlated with subsequent delinquency, and if loan-to-value ratios were based on AVM valuations rather than appraisals, 14% of loans would have origination loan-to-value ratios above 100%, and 17% to 25% of loans would have combined loan-to-value ratios above 100%. Simulations and analysis of unfunded loan application appraisals indicate that appraisal bias comes from intentional appraisal inflation as opposed to selection bias. Finally, appraisal bias varies across loan officers, mortgage brokers, and appraisers; and past appraisal bias predicts subsequent appraisal bias, which suggests that appraisal bias is related to intentional decisions.
Keywords: appraisal bias, misreporting, mortgage, mortgage-backed security
JEL Classification: G21, G23, R30
Suggested Citation: Suggested Citation