Artikel

Application of vine copulas to credit portfolio risk modeling

In this paper, we demonstrate the superiority of vine copulas over conventional copulas when modeling the dependence structure of a credit portfolio. We show statistical and economic implications of replacing conventional copulas by vine copulas for a subportfolio of the Euro Stoxx 50 and the S&P 500 companies, respectively. Our study includes D-vines and R-vines where the bivariate building blocks are chosen from the Gaussian, the t and the Clayton family. Our findings are (i) the conventional Gauss copula is deficient in modeling the dependence structure of a credit portfolio and economic capital is seriously underestimated; (ii) D-vine structures offer a better statistical fit to the data than classical copulas, but underestimate economic capital compared to R-vines; (iii) when mixing different copula families in an R-vine structure, the best statistical fit to the data can be achieved which corresponds to the most reliable estimate for economic capital.

Sprache
Englisch

Erschienen in
Journal: Journal of Risk and Financial Management ; ISSN: 1911-8074 ; Volume: 9 ; Year: 2016 ; Issue: 2 ; Pages: 1-15 ; Basel: MDPI

Klassifikation
Wirtschaft
Thema
pair-copula constructions
vine copulas
Archimedean and elliptical copulas
credit portfolio risk
economic capital
R-vine
D-vine

Ereignis
Geistige Schöpfung
(wer)
Geidosch, Marco
Fischer, Matthias
Ereignis
Veröffentlichung
(wer)
MDPI
(wo)
Basel
(wann)
2016

DOI
doi:10.3390/jrfm9020004
Handle
Letzte Aktualisierung
10.03.2025, 11:44 MEZ

Datenpartner

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Objekttyp

  • Artikel

Beteiligte

  • Geidosch, Marco
  • Fischer, Matthias
  • MDPI

Entstanden

  • 2016

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