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Factor models are well established as promising alternatives to obtain covariance matrices of portfolios containing a very large number of assets. In this paper, we consider a novel multivariate factor GARCH speci cation with a flexible modeling strategy for the common factors, for the...
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The estimation of multivariate GARCH time series models is a difficult task mainly due to the excessive … general formulation of the estimation problem in any dimension and a Bregman-proximal trust-region method for its solution is …
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