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Testing for systemic risk using stock returns

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  • Paul H. Kupiec

    (American Enterprise Institute)

Abstract

Conditional value at risk (CoVaR) and marginal expected shortfall (MES) have been proposed as stock return based measures of the systemic risk created by individual financial institutions even though the literature provides no formal hypothesis test for detecting systemic risk. We address this shortcoming by constructing hypothesis test statistics for CoVaR and MES that can be used to detect systemic risk at the institution level. We apply our tests to daily stock returns data for over 3500 firms during 2006-2007. CoVaR (MES) tests identify almost 500 (1000) firms as systemically important. Both tests identify many more real-side firms than financial firms, and they often disagree about which firms are systemic. Analysis of the hypothesis tests' performance for plausible alternative hypotheses finds that return skewness can cause test rejections and, even when systemic risk imparts a strong signal in stock return distributions, hypothesis tests based on CoVaR and MES may fail to detect it. Our overall conclusion is that CoVaR and MES are not reliable measures of systemic risk.

Suggested Citation

  • Paul H. Kupiec, 2015. "Testing for systemic risk using stock returns," AEI Economics Working Papers 828488, American Enterprise Institute.
    • Handle: RePEc:aei:rpaper:828488
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    Cited by:

    1. Pham, Thach N. & Powell, Robert & Bannigidadmath, Deepa, 2021. "Systemically important banks in Asian emerging markets: Evidence from four systemic risk measures," Pacific-Basin Finance Journal, Elsevier, vol. 70(C).
    2. Kreis, Yvonne & Leisen, Dietmar P.J., 2018. "Systemic risk in a structural model of bank default linkages," Journal of Financial Stability, Elsevier, vol. 39(C), pages 221-236.
    3. Chiara Pederzoli & Costanza Torricelli, 2017. "Systemic risk measures and macroprudential stress tests: an assessment over the 2014 EBA exercise," Annals of Finance, Springer, vol. 13(3), pages 237-251, August.
    4. Javed, Farrukh & Sabzevari, Hassan & Virk, Nader, 2021. "Tail risk emanating from troubled European banking sectors," Finance Research Letters, Elsevier, vol. 43(C).
    5. Zhang, Ailian & Pan, Mengmeng & Liu, Bai & Weng, Yin-Che, 2020. "Systemic risk: The coordination of macroprudential and monetary policies in China," Economic Modelling, Elsevier, vol. 93(C), pages 415-429.
    6. Dissem, Sonia & Lobez, Frederic, 2020. "Correlation between the 2014 EU-wide stress tests and the market-based measures of systemic risk," Research in International Business and Finance, Elsevier, vol. 51(C).
    7. Hai-Chuan Xu & Fredj Jawadi & Jie Zhou & Wei-Xing Zhou, 2023. "Quantifying interconnectedness and centrality ranking among financial institutions with TVP-VAR framework," Empirical Economics, Springer, vol. 65(1), pages 93-110, July.
    8. Wided Khiari & Salim Ben Sassi, 2019. "On Identifying the Systemically Important Tunisian Banks: An Empirical Approach Based on the △CoVaR Measures," Risks, MDPI, vol. 7(4), pages 1-15, December.
    9. Franklin Allen & Itay Goldstein & Julapa Jagtiani & William W. Lang, 2016. "Enhancing Prudential Standards in Financial Regulations," Journal of Financial Services Research, Springer;Western Finance Association, vol. 49(2), pages 133-149, June.
    10. Chiara Pederzoli & Costanza Torricelli, 2017. "Systemic risk measures and macroprudential stress tests: an assessment over the 2014 EBA exercise," Annals of Finance, Springer, vol. 13(3), pages 237-251, August.
    11. Zhu, Bo & Zhang, Yufei & Li, Xiru & Hu, Xin, 2025. "Systemic risk spillovers of nonfinancial firms: Does bank liquidity hoarding matter? Evidence from China," International Review of Economics & Finance, Elsevier, vol. 103(C).
    12. Zhu, Bo & Lin, Renda & Deng, Yuanyue & Chen, Pingshe & Chevallier, Julien, 2021. "Intersectoral systemic risk spillovers between energy and agriculture under the financial and COVID-19 crises," Economic Modelling, Elsevier, vol. 105(C).
    13. Mikhail Stolbov & Maria Shchepeleva, 2018. "Systemic risk in Europe: deciphering leading measures, common patterns and real effects," Annals of Finance, Springer, vol. 14(1), pages 49-91, February.
    14. Silva, Walmir & Kimura, Herbert & Sobreiro, Vinicius Amorim, 2017. "An analysis of the literature on systemic financial risk: A survey," Journal of Financial Stability, Elsevier, vol. 28(C), pages 91-114.

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