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Sovereign credit ratings, market volatility, and financial gains

Author

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  • Afonso, António
  • Gomes, Pedro
  • Taamouti, Abderrahim
Abstract
The reaction of EU bond and equity market volatilities to sovereign rating announcements (Standard & Poor’s, Moody’s, and Fitch) is investigated using a panel of daily stock market and sovereign bond returns. The parametric volatilities are defined using EGARCH specifications. The estimation results show that upgrades do not have significant effects on volatility, but downgrades increase stock and bond market volatility. Contagion is present, and sovereign rating announcements create interdependence among European financial markets with upgrades (downgrades) in one country leading to a decrease (increase) in volatility in other countries. The empirical results show also a financial gain and risk (value-at-risk) reduction for portfolio returns when taking into account sovereign credit ratings’ information for volatility modelling, with financial gains decreasing with higher risk aversion.

Suggested Citation

  • Afonso, António & Gomes, Pedro & Taamouti, Abderrahim, 2014. "Sovereign credit ratings, market volatility, and financial gains," Computational Statistics & Data Analysis, Elsevier, vol. 76(C), pages 20-33.
    • Handle: RePEc:eee:csdana:v:76:y:2014:i:c:p:20-33
    DOI: 10.1016/j.csda.2013.09.028
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    6. Roman Garcia & Dimitri Lorenzani & Daniel Monteiro & Francesco Perticari & Bořek Vašíček & Lukas Vogel, 2021. "Financial Spillover and Contagion Risks in the Euro Area in 2007-2019," European Economy - Discussion Papers 137, Directorate General Economic and Financial Affairs (DG ECFIN), European Commission.
    7. Bales, Kyle & Malikane, Christopher, 2020. "The effect of credit ratings on emerging market volatility," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 65(C).
    8. António Afonso & João Tovar Jalles, 2020. "Economic volatility and sovereign yields’ determinants: a time-varying approach," Empirical Economics, Springer, vol. 58(2), pages 427-451, February.
    9. Sahibzada, Irfan Ullah, 2023. "To what extent do sovereign rating actions affect global equity market sectors?," International Review of Economics & Finance, Elsevier, vol. 84(C), pages 240-261.
    10. Chen, Sheng-Syan & Chen, Hsien-Yi & Chang, Chong-Chuo & Yang, Shu-Ling, 2016. "The relation between sovereign credit rating revisions and economic growth," Journal of Banking & Finance, Elsevier, vol. 64(C), pages 90-100.
    11. Alexandra Popescu & Camelia Turcu, 2014. "Systemic Sovereign Risk in Europe: an MES and CES Approach," Revue d'économie politique, Dalloz, vol. 124(6), pages 899-925.
    12. Afik, Zvika & Zabolotnyuk, Yuriy, 2023. "Information effect of credit rating announcements in transition economies," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 89(C).
    13. Paweł Tobera, 2019. "Ocena ratingowa a koszt obsługi długu publicznego w krajach Europy Środkowo-Wschodniej w latach 2005–2017," Gospodarka Narodowa. The Polish Journal of Economics, Warsaw School of Economics, issue 1, pages 87-109.
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    15. Abad, Pilar & Alsakka, Rasha & ap Gwilym, Owain, 2018. "The influence of rating levels and rating convergence on the spillover effects of sovereign credit actions," Journal of International Money and Finance, Elsevier, vol. 85(C), pages 40-57.
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    17. Kluge, Jan & Lappoehn, Sarah & Plank, Kerstin, 2020. "The Determinants of Economic Competitiveness," IHS Working Paper Series 24, Institute for Advanced Studies.
    18. Luitel, Prabesh & Vanpée, Rosanne, 2018. "How do sovereign credit ratings help to financially develop low-developed countries?," ECMI Papers 13956, Centre for European Policy Studies.
    19. António Afonso & Krzysztof Beck & Karen Jackson, 2022. "Determinants of Stock Market Correlation. Accounting for Model Uncertainty and Reverse Causality in a Large Panel Setting," CESifo Working Paper Series 9956, CESifo.
    20. Houssam Bouzgarrou & Tarek Chebbi, 2016. "The reaction of sovereign CDS spread volatilities to news announcements," Journal of Asset Management, Palgrave Macmillan, vol. 17(5), pages 347-360, September.
    21. Fathi Nakai & Tarek Chebbi, 2023. "The informational content of sovereign credit rating: another look," Journal of Asset Management, Palgrave Macmillan, vol. 24(5), pages 353-373, September.
    22. Vu, Huong & Alsakka, Rasha & Gwilym, Owain ap, 2015. "The credit signals that matter most for sovereign bond spreads with split rating," Journal of International Money and Finance, Elsevier, vol. 53(C), pages 174-191.
    23. Tran, Yen & Vu, Huong & Klusak, Patrycja & Kraemer, Moritz & Hoang, Tri, 2021. "Sovereign credit ratings during the COVID-19 pandemic," International Review of Financial Analysis, Elsevier, vol. 78(C).

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    More about this item

    Keywords

    Sovereign ratings; Yields; Stock market returns; Volatility; EGARCH; Optimal portfolio; Financial gain; Risk management; Value-at-risk;
    All these keywords.

    JEL classification:

    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets
    • H30 - Public Economics - - Fiscal Policies and Behavior of Economic Agents - - - General

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