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Technical paper/Parametric modelling

Benchmarking asset correlations

Basel II stipulates that the asset correlation to be used in calibration of obligor risk weights is20%. Here, Alfred Hamerle, Thilo Liebig and Daniel Rösch use a parametric model to empirically obtain asset correlations from a large database of…

Benchmarking asset correlations

Basel II stipulates that the asset correlation to be used in calibration of obligor risk weights is 20%. Here, Alfred Hamerle, Thilo Liebig and Daniel Rösch use a parametric model to empirically obtain asset correlations from a large database of…

Minimising extremes

Portfolio diversification often breaks down in stressed market environments, but the co-movement of asset prices in a tail risk regime may be modelled using a coefficient of tail dependence. Here, Yannick Malevergne and Didier Sornette show how such…

VaR-x: Fat tails in financial risk management

To ensure a competent regulatory framework with respect to value-at-risk (VaR) for establishing a bank's capital adequacy requirements, as promoted by the Basel Committee on Banking Supervision, the parametric approach for estimating VaR needs to…