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An assessment of Basel II procyclicality in mortgage portfolios

Listed author(s):
  • Jesús Saurina

    ()

    (Banco de España)

  • Carlos Trucharte

    ()

    (Banco de España)

In this paper we develop a probability of default (PD) model for mortgage loans, taking advantage of the Spanish Credit Register, a comprehensive database on loan characteristics and credit quality. From that model, we calculate different types of PDs: point in time, PIT, through the cycle, TTC, average across the cycle and acyclical. Then, we compare capital requirements coming from the different Basel II approaches. We show that minimum regulatory capital under Basel II can be very sensitive to the risk measurement methodology employed. Thus, the procyclicality of regulatory capital requirements under Basel II is an open question, depending on the way internal rating systems are implemented and their output is utilised. We focus on the mortgage portfolio since it is one of the most under researched areas regarding the impact of Basel II and because it is one of the most important banks’ portfolios.

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File URL: http://www.bde.es/f/webbde/SES/Secciones/Publicaciones/PublicacionesSeriadas/DocumentosTrabajo/07/Fic/dt0712e.pdf
File Function: First version, May 2007
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Paper provided by Banco de España & Working Papers Homepage in its series Working Papers with number 0712.

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Length: 33 pages
Date of creation: May 2007
Handle: RePEc:bde:wpaper:0712
Contact details of provider: Web page: http://www.bde.es/

Web page: http://www.bde.es/bde/en/secciones/informes/Publicaciones_se/docs/
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  19. Gordy, Michael B. & Howells, Bradley, 2006. "Procyclicality in Basel II: Can we treat the disease without killing the patient?," Journal of Financial Intermediation, Elsevier, vol. 15(3), pages 395-417, July.
  20. Dietsch, Michel & Petey, Joel, 2002. "The credit risk in SME loans portfolios: Modeling issues, pricing, and capital requirements," Journal of Banking & Finance, Elsevier, vol. 26(2-3), pages 303-322, March.
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