Zoekopdracht:
faculteit: "FEB" en publicatiejaar: "2005"
| Auteurs | J.L.M. Dhaene, M.J. Goovaerts, M Lundin, S. Vanduffel | | Titel | Aggregating economic capital |
| Tijdschrift | Belgian Actuarial Bulletin |
| Jaargang | 5 |
| Jaar | 2005 |
| Nummer | 1 |
| Pagina's | 14-25 |
| ISSN | 17845742 |
| Faculteit | Faculteit Economie en Bedrijfskunde |
| Instituut/afd. | FEB: Research Institute in Economics and Econometrics Amsterdam (RESAM) |
| Samenvatting | In this paper we analyze and evaluate a standard approach financial institutions use to calculate their so-called total economic capital. If we consider a business that faces a total random loss S over a given one-year horizon then economic capital is traditionally defined as the difference between 99.97% percentile of S and its expectation. The standard approach essentially assumes that the different components (risks) of S are multivariate normally distributed and this highly facilitates the computation of the total aggregated economic capital. In this paper we show that this approach also holds for a more general framework which encompasses as a special case the multivariate normal (and elliptical) setting. We question also the assumption of multivariate normality since for many risks one often assumes other than normal distributions (e.g. a lognormal distribution for insurqnce risk). Assuming that risks are either normal or lognormal distributed we propose, using the concept of comonotonicity, an alternative aggregation approach. |
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