摘要 : The aim of this paper is to derive value-at-risk (VaR) bounds for the portfolios of possibly dependent financial assets for heavy tailed Glosten-Jagannathan-Runkle generalized autoregressive conditional heteroscedasticity processe... 展开 The aim of this paper is to derive value-at-risk (VaR) bounds for the portfolios of possibly dependent financial assets for heavy tailed Glosten-Jagannathan-Runkle generalized autoregressive conditional heteroscedasticity processes using extreme value theory copulas. Using the 2014 contribution of Gammoudi et al made in "Value at risk estimation for heavy tailed distributions" as well as the 2005 paper by Mesfioui and Quessy titled "Bounds on the value-at-risk for the sum of possibly dependent risks", we provide modified VaR bounds for when a shift of location is introduced. These bounds have the interesting property of location invariance. Empirical studies for several market indexes are carried out to illustrate our approach. 收起