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Persistent link: https://www.econbiz.de/10011349820
We advocate the use of absolute moment ratio statistics in conjunctionwith standard variance ratio statistics in order to disentangle lineardependence, non-linear dependence, and leptokurtosis in financial timeseries. Both statistics are computed for multiple return horizonssimultaneously, and...
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risk for many financial sector firms. The model is based on a dynamic Generalized Hyperbolic Skewed-t block … joint and conditional risk measures that can be evaluated quickly and reliably. We apply the modeling framework to assess … the joint risk from multiple defaults in the euro area during the 2008-2012 financial and sovereign debt crisis. We …
Persistent link: https://www.econbiz.de/10011332950
We consider a new copula method for mixed marginals of discrete and continuous random variables. Unlike the Bayesian methods in the literature, we use maximum likelihood estimation based on closed-form copula functions. We show with a simulation that our methodology performs similar to the...
Persistent link: https://www.econbiz.de/10010464789
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Using a limiting approach to portfolio credit risk, we obtain analyticexpressions for the tail behavior of the … aretriggered by a general latent factor model involving systematic andidiosyncratic risk. We show explicitly how the tail behavior … of the distributionof these two risk factors relates to the tail behavior of the credit lossdistribution. Even if the …
Persistent link: https://www.econbiz.de/10011316891
We propose a new class of observation-driven time-varying parameter models for dynamic volatilities and correlations to handle time series from heavy-tailed distributions. The model adopts generalized autoregressive score dynamics to obtain a time-varying covariance matrix of the multivariate...
Persistent link: https://www.econbiz.de/10011380135
We propose a new model for dynamic volatilities and correlations of skewed and heavy-tailed data. Our model endows the Generalized Hyperbolic distribution with time-varying parameters driven by the score of the observation density function. The key novelty in our approach is the fact that the...
Persistent link: https://www.econbiz.de/10011386468
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