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A transitions-based framework for estimating expected credit losses

Edward Gaffney, Robert Kelly and Fergal McCann ()
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Edward Gaffney: Central Bank of Ireland

No 16/RT/14, Research Technical Papers from Central Bank of Ireland

Abstract: This paper presents a framework for estimating losses for residential mortgage loans.At the core is a transitions-based probability of default model which yields directly observ- able cash-fl ows at the loan level. The estimated model includes coefficients on unemployment, Loan to Value ratio and interest rates, all of which allow a macroeconomic scenario to be fed through the model and impact loans' probability of default and cure. Other loan-level covariates such as bank, Buy-to-Let status, and vintage also impact loans' transition probabilities. Loss Given Default is also modelled over a three-year horizon combining loan-level collateral information with macroeconomic house price forecasts. The breakout of ows from the stock of defaults allows the impact of loan modi cations on recovery rates to be modelled. Unlike other models of mortgage credit risk, this framework allows a hysteresis e ect of the time spent in default on the probability of loan cure to be modelled explicitly. In Ireland, an increase in the time spent in default from three months to one year leads to a decrease in the probability of loan cure from 30 to 12 per cent.

Keywords: Mortgages; default; credit risk; Markov multi-state model. (search for similar items in EconPapers)
Date: 2014-11
New Economics Papers: this item is included in nep-ban, nep-rmg and nep-ure
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (17)

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