2019冠状病毒病期间全球航空股指数的黄金:对冲还是避险资产?

IF 3.9 2区 工程技术 Q2 TRANSPORTATION
Nedal Al-Fayoumi , Bana Abuzayed , Elie Bouri
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引用次数: 0

摘要

我们研究了在COVID-19大流行期间,航空业投资者是否可以通过在全球和地区航空公司股票投资组合中持有黄金来获得对冲和/或避险收益。利用2016年6月8日至2021年6月8日的每日数据,我们采用多元GARCH模型,显示了负面信号的部分共波动溢出效应,以及黄金与四个全球/地区航空公司股票指数之间微弱但不稳定的相关性的证据。我们计算了对冲比率、最优权重和对冲有效性,并发现,在疫情高峰期,全球航空公司投资者扩大了对黄金的投资,将其作为一种“避险”资产,从而产生了可观的对冲有效性。最后,我们运行回归模型,结果表明,黄金不是针对航空公司股票指数下行风险的强大避险资产,但在许多情况下,它充当了强大的对冲工具。我们的发现对于多元GARCH模型的选择是稳健的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Gold for global airline stock indices during COVID-19: Hedge or safe-haven asset?
We examine whether airline industry investors can gain hedging and/or safe-haven benefits from holding gold in a portfolio of global and regional airline stocks during the COVID-19 pandemic. Using daily data from June 8, 2016 until June 8, 2021, we employ multivariate GARCH models and show partial co-volatility spillovers of negative signs and evidence of weak but unstable correlations between gold and each of the four global/regional airline stock indices. We calculate hedge ratios, optimal weights, and hedging effectiveness and reveal that, during the peak of the pandemic, global airline investors expanded their investment in gold as a “flight-to-safety” asset, leading to substantial hedging effectiveness. Finally, we run regression models and the results indicate that gold is not a strong safe-haven asset against the downside risk of airline stock indices but acts as a strong hedge in many cases. Our findings are robust to the choice of the multivariate GARCH model.
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来源期刊
CiteScore
12.40
自引率
11.70%
发文量
97
期刊介绍: The Journal of Air Transport Management (JATM) sets out to address, through high quality research articles and authoritative commentary, the major economic, management and policy issues facing the air transport industry today. It offers practitioners and academics an international and dynamic forum for analysis and discussion of these issues, linking research and practice and stimulating interaction between the two. The refereed papers in the journal cover all the major sectors of the industry (airlines, airports, air traffic management) as well as related areas such as tourism management and logistics. Papers are blind reviewed, normally by two referees, chosen for their specialist knowledge. The journal provides independent, original and rigorous analysis in the areas of: • Policy, regulation and law • Strategy • Operations • Marketing • Economics and finance • Sustainability
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