Transition risks and sovereign debt costs: a premium on fossil resources?

Mouez Fodha (), Djamel Kirat () and Chahir Zaki ()
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Mouez Fodha: 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 - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement - ENPC - École nationale des ponts et chaussées - IP Paris - Institut Polytechnique de Paris, UP1 - Université Paris 1 Panthéon-Sorbonne
Djamel Kirat: LEO - Laboratoire d'Économie d'Orleans [2022-...] - UO - Université d'Orléans - UT - Université de Tours - UCA - Université Clermont Auvergne
Chahir Zaki: LEO - Laboratoire d'Économie d'Orleans [2022-...] - UO - Université d'Orléans - UT - Université de Tours - UCA - Université Clermont Auvergne

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Abstract: This paper examines the impact of low-carbon transition risks on sovereign borrowing costs. Using two unbalanced panel datasets covering 125 countries from 1995 to 2019, we estimate extended models of the macroeconomic determinants of short- and long-term sovereign debt costs. We include key indicators capturing exposure to transition risks, such as fossil resource abundance, the carbon intensity of GDP, and the share of renewable energy in total energy consumption. Results show that fossil resource abundance and a higher renewable energy share are associated with lower borrowing costs, whereas greater carbon intensity raises sovereign debt costs. Financial markets therefore appear to reward fossil resource endowments while penalizing carbon-intensive uses of these resources. This reveals a contradictory signal: fossil resource wealth lowers the cost of public borrowing, as it is perceived as a form of implicit collateral, while the actual use of these resources increases borrowing costs, reflecting a carbon risk premium.

Date: 2026-06
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Published in Macroeconomic Dynamics, 2026, 30, pp.1-28. ⟨10.1017/S1365100526101060⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:halshs-05650286

DOI: 10.1017/S1365100526101060

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