Credit Risk Migration and Economic Cycles

Clicks: 191
ID: 113529
2019
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Abstract
The misestimation of rating transition probabilities may lead banks to lend money incoherently with borrowers’ default trajectory, causing both a deterioration in asset quality and higher system distress. Applying a Mover-Stayer model to determine the migration risk of small and medium enterprises, we find that banks are over-estimating their credit risk resulting in excessive regulatory capital. This has important macroeconomic implications due to the fact that holding a large capital buffer is costly for banks and this in turn influences their ability to lend in the wider economy. This conclusion is particularly true during economic downturns with the consequence of exacerbating the cyclicality in risk capital that therefore acts to aggravate economic conditions further. We also explain part of the misevaluation of borrowers and the actual relevant weight of non-performing loans within banking portfolios: some of the prudential requirements, at least as regards EMS credit portfolios, cannot be considered effective as envisaged by the regulators who developed the “new” regulation in response to the most recent crisis. The Mover-Stayers approach helps to reduce calculation inaccuracy when analyzing the historical movements of borrowers’ ratings and consequently, improves the efficacy of the resource allocation process and banking industry stability.
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ferretti2019riskscredit Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Camilla Ferretti;Giampaolo Gabbi;Piero Ganugi;Federica Sist;Pietro Vozzella;Ferretti, Camilla;Gabbi, Giampaolo;Ganugi, Piero;Sist, Federica;Vozzella, Pietro;
Journal risks
Year 2019
DOI
10.3390/risks7040109
URL
https://doi.org/10.3390/risks7040109
Keywords
markov chains credit risk absorbing state rating migration markov chains credit risk absorbing state rating migration

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