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Risk spillover from crude oil prices to GCC stock market returns: New evidence during the COVID-19 outbreak
The North American Journal of Economics and Finance ( IF 3.8 ) Pub Date : 2021-06-01 , DOI: 10.1016/j.najef.2021.101476
Bana Abuzayed , Nedal Al-Fayoumi

In this study, we examine oil price extreme tail risk spillover to individual Gulf Cooperation Council (GCC) stock markets and quantify this spillover’s shift before and during the COVID-19 pandemic. A dynamic conditional correlation generalized autoregressive heteroscedastic (DCC- GARCH) model is employed to estimate three important measures of tail dependence risk: conditional value at risk (CoVaR), delta CoVaR (ΔCoVaR), and marginal expected shortfall (MES). Using daily data from January 2017 until May 2020, results point to significant systemic oil risk spillover in all GCC stock markets. In particular, the effect of oil price systemic risk on GCC stock market returns was significantly larger during COVID-19 than before the pandemic. Upon splitting COVID-19 into two phases based on severity, we identify Saudi Arabia as the only GCC market to have experienced significantly higher exposure to oil risk in Phase 1. Although all GCC stock markets received greater oil systemic risk spillover in Phase 2 of COVID-19, Saudi Arabia and the United Arab Emirates appeared more vulnerable to oil extreme risk than other countries. Our empirical findings reveal that investors should carefully consider the extreme oil risk effects on GCC stock markets when designing optimal portfolio strategies, minimizing portfolio risk, and adopting dynamic diversification process. Policymakers and regulators should also enact awareness, oversight, and action plans to minimize adverse oil risk effects.



中文翻译:

原油价格对海湾合作委员会股票市场回报的风险溢出:COVID-19 爆发期间的新证据

在这项研究中,我们研究了油价极端尾部风险对海湾合作委员会 (GCC) 个别股票市场的溢出效应,并量化了这种溢出效应在 COVID-19 大流行之前和期间的转变。采用动态条件相关广义自回归异方差 (DCC-GARCH) 模型来估计尾部依赖风险的三个重要度量:条件风险值 (CoVaR)、delta CoVaR (ΔCoVaR) 和边际预期短缺 (MES)。使用 2017 年 1 月至 2020 年 5 月的每日数据,结果表明所有海湾合作委员会股票市场都存在重大的系统性石油风险溢出效应。特别是,在 COVID-19 期间,油价系统性风险对海湾合作委员会股票市场回报的影响比大流行之前要大得多。根据严重程度将 COVID-19 分为两个阶段后,我们认为沙特阿拉伯是唯一一个在第 1 阶段经历了显着更高石油风险敞口的 GCC 市场。尽管所有 GCC 股票市场在 COVID-19 的第 2 阶段都受到了更大的石油系统性风险溢出,但沙特阿拉伯和阿拉伯联合酋长国似乎更多比其他国家更容易受到石油极端风险的影响。我们的实证结果表明,投资者在设计最优投资组合策略、最小化投资组合风险和采用动态多元化过程时,应仔细考虑极端石油风险对 GCC 股票市场的影响。政策制定者和监管机构还应制定意识、监督和行动计划,以尽量减少不利的石油风险影响。尽管所有海湾合作委员会股票市场在 COVID-19 的第 2 阶段都收到了更大的石油系统性风险溢出效应,但沙特阿拉伯和阿拉伯联合酋长国似乎比其他国家更容易受到石油极端风险的影响。我们的实证结果表明,投资者在设计最优投资组合策略、最小化投资组合风险和采用动态多元化过程时,应仔细考虑极端石油风险对 GCC 股票市场的影响。政策制定者和监管机构还应制定意识、监督和行动计划,以尽量减少不利的石油风险影响。尽管所有海湾合作委员会股票市场在 COVID-19 的第 2 阶段都收到了更大的石油系统性风险溢出效应,但沙特阿拉伯和阿拉伯联合酋长国似乎比其他国家更容易受到石油极端风险的影响。我们的实证结果表明,投资者在设计最优投资组合策略、最小化投资组合风险和采用动态多元化过程时,应仔细考虑极端石油风险对 GCC 股票市场的影响。政策制定者和监管机构还应制定意识、监督和行动计划,以尽量减少不利的石油风险影响。最小化投资组合风险,并采用动态多元化流程。政策制定者和监管机构还应制定意识、监督和行动计划,以尽量减少不利的石油风险影响。最小化投资组合风险,并采用动态多元化流程。政策制定者和监管机构还应制定意识、监督和行动计划,以尽量减少不利的石油风险影响。

更新日期:2021-06-08
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