The economy and loss given default: evidence from two UK retail lending data sets

Mindy Leow, Christophe Mues and Lyn Thomas
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Mindy Leow: Credit Research Centre, Business School, University of Edinburgh, Edinburgh, UK
Christophe Mues: School of Management, University of Southampton, Southampton, UK
Lyn Thomas: School of Management, University of Southampton, Southampton, UK

Journal of the Operational Research Society, 2014, vol. 65, issue 3, 363-375

Abstract: Loss given default (LGD) models predict losses as a proportion of the outstanding loan, in the event a debtor goes into default. The literature on corporate sector LGD models suggests LGD is correlated to the economy and so changes in the economy could translate into different predictions of losses. In this work, the role of macroeconomic variables in loan-level retail LGD models is examined by testing the inclusion of macroeconomic variables in two different retail LGD models: a two-stage model for a residential mortgage loans data set and an ordinary least squares model for an unsecured personal loans data set. To improve loan-level predictions of LGD, indicators relating to the macroeconomy are considered with mixed results: the selected macroeconomic variable seemed able to improve the predictive performance of mortgage loan LGD estimates, but not for personal loan LGD. For mortgage loan LGD, interest rate was most beneficial but only predicted better during downturn periods, underestimating LGD during non-downturn periods. For personal loan LGD, only net lending growth is statistically significant but including this variable did not bring any improvement to R2.

Date: 2014
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