Tail risk forecasting with semi-parametric regression models by incorporating overnight information

Cathy W. S. Chen, Takaaki Koike and Wei-Hsuan Shau

Papers from arXiv.org

Abstract: This research incorporates realized volatility and overnight information into risk models, wherein the overnight return often contributes significantly to the total return volatility. Extending a semi-parametric regression model based on asymmetric Laplace distribution, we propose a family of RES-CAViaR-oc models by adding overnight return and realized measures as a nowcasting technique for simultaneously forecasting Value-at-Risk (VaR) and expected shortfall (ES). We utilize Bayesian methods to estimate unknown parameters and forecast VaR and ES jointly for the proposed model family. We also conduct extensive backtests based on joint elicitability of the pair of VaR and ES during the out-of sample period. Our empirical study on four international stock indices confirms that overnight return and realized volatility are vital in tail risk forecasting.

Date: 2024-02
New Economics Papers: this item is included in nep-ecm and nep-rmg
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