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Persistent link: https://www.econbiz.de/10000960148
The constant conditional correlation GARCH model is probably the most frequently applied multivariate GARCH model. In this paper we consider an extension to this model and examine its fourth-moment structure. The extension, first considered by Jeantheau (1998), is motivated by the result found...
Persistent link: https://www.econbiz.de/10001693116
In this paper we derive conditions for the conditional covariance matrix to be positive definite in a general vector ARCH model. The conditions can be easily extended to the diagonal vector GARCH model. For the general vector GARCH model, analytical expressions for the conditions in terms of the...
Persistent link: https://www.econbiz.de/10001714621
Persistent link: https://www.econbiz.de/10000971492