Detail publikace

Bank-Sourced Transition Matrices: Are Banks' Internal Credit Risk Estimates Markovian?

Autor: Ing. Mgr. Barbora Máková M.A.,
Typ: IES Working Papers
Rok: 2019
Číslo: 3
ISSN / ISBN:
Publikováno v: IES Working Papers 3/2019
Místo vydání: Prague
Klíčová slova: Risk management, credit risk, transition matrices
JEL kódy: C12, G12, G21, G32
Citace: Máková B. (2019): “Bank-Sourced Transition Matrices: Are Banks' Internal Credit Risk Estimates Markovian? ” IES Working Papers 3/2019. IES FSV. Charles University.
Abstrakt: This study provides new insights into banks' credit risk models by exploring features of their credit risk estimates and assessing practicalities of transition matrix estimation and related assumptions. Using a unique dataset of internal credit risk estimates from twelve global A-IRB banks, covering monthly observations on 20,000 North American and EU large corporates over the 2015-2018 time period, the study
empirically tests the widely used assumptions of the Markovian property and time homogeneity at a larger scale than previously documented in the literature. The results show that internal credit risk estimates do not satisfy these assumptions as they show evidence of both path-dependency and time heterogeneity. In addition, contradicting previous findings on credit rating agency data, banks tend to revert
their rating actions.
Ke stažení: wp_2019_03_makova

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