Estimation of conditional time-homogeneous credit quality transition matrices
This paper presents a methodology for estimating time-homogeneous credit quality transition matrices. Using a unique data set on credit ratings of commercial loans in Colombia, we show that 70% of the time we cannot reject the null hypothesis of time homogeneity of transition matrices estimated this way. We also find that obtaining matrices for different subsamples is not necessary, given the similarities of the survival functions.
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- José E.Gómez González & Nicholas M. Kiefer, .
"Evidence of non-Markovian behavior in the process of bank rating migrations,"
Borradores de Economia
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- José E. Gómez-Gonzalez & Nicholas M. Kiefer, 2007. "Evidence of non-Markovian behavior in the process of bank rating migrations," BORRADORES DE ECONOMIA 003961, BANCO DE LA REPÚBLICA.
- José E. Gómez González & Nicholas M. Kiefer, 2007. "Evidence of non-Markovian behavior in the process of bank rating migrations," BORRADORES DE ECONOMIA 004016, BANCO DE LA REPÚBLICA.
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- Anil Bangia & Francis X. Diebold & Til Schuermann, 2000.
"Ratings Migration and the Business Cycle, With Application to Credit Portfolio Stress Testing,"
Center for Financial Institutions Working Papers
00-26, Wharton School Center for Financial Institutions, University of Pennsylvania.
- Bangia, Anil & Diebold, Francis X. & Kronimus, Andre & Schagen, Christian & Schuermann, Til, 2002. "Ratings migration and the business cycle, with application to credit portfolio stress testing," Journal of Banking & Finance, Elsevier, vol. 26(2-3), pages 445-474, March.
- Treacy, William F. & Carey, Mark, 2000. "Credit risk rating systems at large US banks," Journal of Banking & Finance, Elsevier, vol. 24(1-2), pages 167-201, January.
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