道琼斯股票市场的下行风险:COVID-19 大流行和俄乌战争期间的对冲和投资组合管理

Amira Said, Chokri Ouerfelli
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摘要

目的 本文旨在研究道琼斯市场与石油、黄金和比特币之间的动态条件相关性(DCC)和对冲比率。我们使用每日数据,包括 COVID-19 大流行和俄乌战争。我们采用了 DCC-广义自回归条件异方差(GARCH)和非对称 DCC(ADCC)-GARCH 模型。这意味着多样化缺乏额外的经济收益。因此,COVID-19 代表着一种抵制多样化的系统性风险。然而,在俄乌战争期间,包括石油和黄金在内的大多数货币对的 DCC 均为负值,这意味着投资者可从投资组合多样化中获益。我们的对冲分析对于在对冲道琼斯投资组合的同时寻求更高回报的投资者具有重要意义:保持投资组合不对冲比对冲更好。原创性/价值我们的论文通过研究金融资产(包括传统资产和伊斯兰资产)在稳定期和危机期(如 COVID-19 大流行病和俄罗斯-乌克兰战争)的对冲情况,为现有文献做出了宝贵贡献。
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Downside risk in Dow Jones equity markets: hedging and portfolio management during COVID-19 pandemic and the Russia–Ukraine war
PurposeThis paper aims to examine the dynamic conditional correlation (DCC) and hedging ratios between Dow Jones markets and oil, gold and bitcoin. Using daily data, including the COVID-19 pandemic and the Russia–Ukraine war. We employ the DCC-generalized autoregressive conditional heteroskedasticity (GARCH) and asymmetric DCC (ADCC)-GARCH models.Design/methodology/approachDCC-GARCH and ADCC-GARCH models.FindingsThe most of DCCs among market pairs are positive during COVID-19 period, implying the existence of volatility spillovers (Contagion-effects). This implies the lack of additional economic gains of diversification. So, COVID-19 represents a systematic risk that resists diversification. However, during the Russia–Ukraine war the DCCs are negative for most pairs that include Oil and Gold, implying investors may benefit from portfolio-diversification. Our hedging analysis carries significant implications for investors seeking higher returns while hedging their Dow Jones portfolios: keeping their portfolios unhedged is better than hedging them. This is because Islamic stocks have the ability to mitigate risks.Originality/valueOur paper may make a valuable contribution to the existing literature by examining the hedging of financial assets, including both conventional and Islamic assets, during periods of stability and crisis, such as the COVID-19 pandemic and the Russia–Ukraine war.
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