Regime switching dynamic correlations for asymmetric and fat-tailed conditional returns
非对称厚尾条件收益的状态切换动态相关模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接建模金融收益的动态相关性与厚尾分布,并讨论风险预测、压力时期资本和危机损失,对应波动率及金融风险。
非对称厚尾条件收益的状态切换动态相关模型AI 解读 ↓
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A non-Gaussian multivariate regime switching dynamic correlation model for financial asset returns is proposed. It incorporates the multivariate generalized hyperbolic law for the conditional distribution of returns. All model parameters are estimated consistently using a new two-stage expectation–maximization algorithm that also allows for incorporation of shrinkage estimation via quasi-Bayesian priors. It is shown that use of Markov switching correlation dynamics not only leads to highly accurate risk forecasts, but also potentially reduces the regulatory capital requirements during periods of distress. In terms of portfolio performance, the new regime switching model delivers consistently higher Sharpe ratios and smaller losses than the equally weighted portfolio and all competing models. Finally, the regime forecasts are employed in a new dynamic risk control strategy that avoids most losses during the financial crisis and vastly improves risk-adjusted returns.