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Sovereigns at risk: A dynamic model of sovereign debt and banking leverage

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  • Nuno Coimbra

    (PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, PJSE - Paris Jourdan Sciences Economiques - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

Abstract

This paper develops a dynamic model with heterogeneous investors and sovereign default to analyze the dynamic link between banking sector capitalization and sovereign bond yields. The banking sector is modelled as operating under a Value-at-Risk (VaR) constraint, which can bind occasionally. As default risk rises, the constraint may bind, generating a fall in demand for sovereign bonds that can be accompanied by a rise in the risk premium if other agents are more risk averse. In turn, the rise in risk premium leads to a feedback effect through debt accumulation dynamics and the probability of government default.

Suggested Citation

  • Nuno Coimbra, 2020. "Sovereigns at risk: A dynamic model of sovereign debt and banking leverage," PSE-Ecole d'économie de Paris (Postprint) halshs-02491806, HAL.
    • Handle: RePEc:hal:pseptp:halshs-02491806
    DOI: 10.1016/j.jinteco.2020.103298
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    8. Florent Kanga GBONGUE & Lambert N’Galadjo BAMBA, 2023. "Le modèle hybride de la structure par terme des primes souveraines de crédit et de liquidité dans la zone UEMOA," Region et Developpement, Region et Developpement, LEAD, Universite du Sud - Toulon Var, vol. 57, pages 101-145.
    9. Nuno Coimbra & Hélène Rey, 2024. "Financial Cycles with Heterogeneous Intermediaries," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 91(2), pages 817-857.
    10. Anne-Laure Delatte & Julien Fouquau & Richard Portes, 2017. "Regime-Dependent Sovereign Risk Pricing During the Euro Crisis," Review of Finance, European Finance Association, vol. 21(1), pages 363-385.
    11. Willi Semmler & Christian R. Proaño, 2015. "Escape Routes from Sovereign Default Risk in the Euro Area," International Symposia in Economic Theory and Econometrics, in: Monetary Policy in the Context of the Financial Crisis: New Challenges and Lessons, volume 24, pages 163-193, Emerald Group Publishing Limited.
    12. Hélène Rey, 2016. "International Channels of Transmission of Monetary Policy and the Mundellian Trilemma," IMF Economic Review, Palgrave Macmillan;International Monetary Fund, vol. 64(1), pages 6-35, May.
    13. Nicholas Apergis & Ahdi Noomen Ajmi, 2015. "Systemic Sovereign Risk and Asset Prices: Evidence from the CDS Market, Stressed European Economies and Nonlinear Causality Tests," Czech Journal of Economics and Finance (Finance a uver), Charles University Prague, Faculty of Social Sciences, vol. 65(2), pages 106-126, April.
    14. Hürtgen, Patrick, 2020. "Fiscal sustainability duringthe COVID-19 pandemic," Discussion Papers 35/2020, Deutsche Bundesbank.
    15. Anne-Laure Delatte & Julien Fouquau & Richard Portes, 2017. "Regime-Dependent Sovereign Risk Pricing During the Euro Crisis," Review of Finance, European Finance Association, vol. 21(1), pages 363-385.
    16. Torres, Leonardo Barros & Paczos, Wojtek & Shakhnov,, 2024. "Domestic and Foreign Sovereign Debt Stability," Cardiff Economics Working Papers E2024/8, Cardiff University, Cardiff Business School, Economics Section.
    17. D’Erasmo, Pablo & Livshits, Igor & Schoors, Koen, 2024. "Banking regulation with risk of sovereign default," Journal of International Economics, Elsevier, vol. 150(C).
    18. Fueki, Takuji & Hürtgen, Patrick & Walker, Todd B., 2024. "Zero-risk weights and capital misallocation," Journal of Financial Stability, Elsevier, vol. 72(C).

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