We investigate whether homeowners respond strategically to news of mortgage modification programs by defaulting on their mortgages. We exploit plausibly exogenous variation in modification policy induced by U.S. state government lawsuits against Countrywide Financial Corporation, which agreed to offer modifications to seriously delinquent borrowers with mortgages throughout the country. Using a difference-indifference framework, we find that Countrywide's relative delinquency rate increased more than ten percent per month immediately after the program's announcement. The borrowers whose estimated default rates increased the most in response to the program were those who appear to have been the least likely to default otherwise, including those with substantial liquidity available through credit cards and relatively low combined loan-to-value ratios. These results suggest that strategic behavior of borrowers should be an important consideration in designing mortgage modification programs.2

No abstract

No abstract

The authors would like to thank Zillow, VenPath, Realtor, Pulsenomics, and Safegraph for providing data. The authors have no conflicts of interest to declare. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peerreviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.

In this paper, I identify shocks to interest rates resulting from two administrative details in adjustable-rate mortgage contract terms: the choice of financial index and the choice of lookback period.