Cluster GARCH
聚类 GARCHAI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以多元 GARCH 建模条件相关动态,并明确处理资产收益的尾部依赖,对应波动率与尾部风险。
聚类 GARCHAI 解读 ↓
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We introduce a novel multivariate GARCH model with flexible convolution-t distributions that is applicable in high-dimensional systems. The model is called Cluster GARCH because it can accommodate cluster structures in the conditional correlation matrix and in tail dependencies. The expressions for the log-likelihood function and its derivatives are tractable, and the latter facilitate a score-driven model for the dynamic correlation structure. We apply the Cluster GARCH model to daily returns for 100 assets and find that it outperforms existing models, both in-sample and out-of-sample. Moreover, the convolution-t distribution provides a better empirical performance than the conventional multivariate t-distribution.