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What are the events that shake our world? Measuring and hedging global COVOL

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  • Engle, Robert F.
  • Campos-Martins, Susana

Abstract

Some events impact volatilities of most assets, asset classes, sectors and countries, causing serious damage to investment portfolios. The magnitude of such shocks is defined as global COVOL which is an abbreviation for global common volatility, a broad measure of all types of global financial risk. This paper introduces a statistical formulation of such events as common volatility innovations in both a multivariate volatility and an asset pricing context. Simulations verify the statistical performance of a simple but novel estimator and of a test to detect global COVOL. Two empirical examples show the events that have had the biggest impact on financial markets. The results are useful for portfolio optimization and risk forecasting.

Suggested Citation

  • Engle, Robert F. & Campos-Martins, Susana, 2023. "What are the events that shake our world? Measuring and hedging global COVOL," Journal of Financial Economics, Elsevier, vol. 147(1), pages 221-242.
    • Handle: RePEc:eee:jfinec:v:147:y:2023:i:1:p:221-242
    DOI: 10.1016/j.jfineco.2022.09.009
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    Citations

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    Cited by:

    1. Ambrocio, Gene & Hasan, Iftekhar & Li, Xiang, 2023. "Global political ties and the global financial cycle," IWH Discussion Papers 23/2023, Halle Institute for Economic Research (IWH).
    2. Lang, Chunlin & Xu, Danyang & Corbet, Shaen & Hu, Yang & Goodell, John W., 2024. "Global financial risk and market connectedness: An empirical analysis of COVOL and major financial markets," International Review of Financial Analysis, Elsevier, vol. 93(C).
    3. Kumar, Pawan & Singh, Vipul Kumar & Rao, Sandeep, 2023. "Does the substitution effect lead to feedback effect linkage between ethanol, crude oil, and soft agricultural commodities?," Energy Economics, Elsevier, vol. 119(C).
    4. Xu, Danyang & Hu, Yang & Corbet, Shaen & Goodell, John W., 2023. "Volatility connectedness between global COVOL and major international volatility indices," Finance Research Letters, Elsevier, vol. 56(C).
    5. Chen, Bin-xia & Sun, Yan-lin, 2024. "Financial market connectedness between the U.S. and China: A new perspective based on non-linear causality networks," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 90(C).
    6. Lang, Chunlin & Hu, Yang & Goodell, John W. & Hou, Yang (Greg), 2024. "Connectedness and co-movement between dirty energy, clean energy and global COVOL," Finance Research Letters, Elsevier, vol. 63(C).
    7. Zhou, Dong-hai & Liu, Xiao-xing, 2024. "Does systemic risk in the fund markets predict future economic downturns?," International Review of Financial Analysis, Elsevier, vol. 92(C).
    8. Zhang, Jiaming & Guo, Songlin & Dou, Bin & Xie, Bingyuan, 2023. "Evidence of the internationalization of China's crude oil futures: Asymmetric linkages to global financial risks," Energy Economics, Elsevier, vol. 127(PA).
    9. Oxley, Les & Hu, Yang & Corbet, Shaen & Goodell, John W., 2023. "Role of precious metals in global risk dynamics: Exploring their impact from a connectedness approach," Finance Research Letters, Elsevier, vol. 58(PD).
    10. Campos-Martins, Susana & Hendry, David F., 2024. "Common volatility shocks driven by the global carbon transition," Journal of Econometrics, Elsevier, vol. 239(1).
    11. Zhou, Dong-hai & Liu, Xiao-xing, 2023. "Do world stock markets “jump” together? A measure of high-frequency volatility risk spillover networks," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 88(C).

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    More about this item

    Keywords

    Global events; Volatility comovements; Multiplicative factor models; Geopolitical risk; Portfolio optimization;
    All these keywords.

    JEL classification:

    • C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
    • C58 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Financial Econometrics
    • C38 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Classification Methdos; Cluster Analysis; Principal Components; Factor Analysis
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets

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