Ji Qiang, Zhang Dayong, Zhao Yuqian
Center for Energy and Environmental Policy Research, Institutes of Science and Development, Chinese Academy of Sciences, China.
Research Institute of Economics and Management, Southwestern University of Finance and Economics, 555 Liutai Avenue, Chengdu 611130, China.
Int Rev Financ Anal. 2020 Oct;71:101526. doi: 10.1016/j.irfa.2020.101526. Epub 2020 May 23.
The ongoing COVID-19 pandemic has shaken the global financial system and caused great turmoil. Facing unprecedented risks in the markets, people have increasing needs to find a safe haven for their investments. Given that the nature of this crisis is a combination of multiple problems, it is substantially different from all other financial crises known to us. It is therefore urgent to re-evaluate the safe-haven role of some traditional asset types, namely, gold, cryptocurrency, foreign exchange and commodities. This paper introduces a sequential monitoring procedure to detect changes in the left-quantiles of asset returns, and to assess whether a tail change in the equity index can be offset by introducing a safe-haven asset into a simple mean-variance portfolio. The sample studied covers a training period between August-December 2019 and a testing period of December 2019-March 2020. Furthermore, we calculate the cross-quantilogram between pair-wise asset returns and compare their directional predictability on left-quantiles in both normal market conditions and the COVID-19 period. The main results show that the role of safe haven becomes less effective for most of the assets considered in this paper, while gold and soybean commodity futures remain robust as safe-haven assets during this pandemic.
持续的新冠疫情动摇了全球金融体系,引发了巨大动荡。面对市场前所未有的风险,人们越来越需要为自己的投资寻找一个安全的避风港。鉴于这场危机的本质是多种问题的结合,它与我们所知的所有其他金融危机有很大不同。因此,迫切需要重新评估一些传统资产类型的避风港作用,即黄金、加密货币、外汇和大宗商品。本文介绍了一种序贯监测程序,用于检测资产回报左分位数的变化,并评估在简单均值-方差投资组合中引入一种避风港资产是否可以抵消股票指数的尾部变化。所研究的样本涵盖2019年8月至12月的训练期和2019年12月至2020年3月的测试期。此外,我们计算了两两资产回报之间的交叉分位数图,并比较了它们在正常市场条件和新冠疫情期间对左分位数的方向预测能力。主要结果表明,本文所考虑的大多数资产的避风港作用变得不那么有效,而黄金和大豆商品期货在这场疫情期间作为避风港资产仍然表现强劲。