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Climate Policy and Sovereign Debt: The Impact of Transition Scenarios on Sovereign Creditworthiness

Author

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  • Burke, M.
  • Agarwala, M.
  • Klusak, P.
  • Mohaddes, K.

Abstract

This paper links climate science with sovereign risk assessment to produce a single forward-looking measure of country-level climate change risk. We combine the Network for Greening the Financial System (NGFS) climate scenarios with a sovereign credit ratings model to simulate the impact of climate change on credit ratings, cost of debt and probability of default. For the first time, we extend beyond the physical risks of extreme weather events to explicitly incorporate risks associated with transitioning the global economy towards Net Zero. Across the sample of 48 countries and under a scenario of high (low) physical and transition risks, we find average downgrades of 3.9 (2.7) notches and mean increases in the cost of debt of 123 (76) basis points and default probability of 10.4% (6.2%). Counter-intuitively, ratings, default probability, and cost of debt appear insensitive to scenarios in some countries, with important implications for the usefulness of NGFS scenarios across central banks.

Suggested Citation

  • Burke, M. & Agarwala, M. & Klusak, P. & Mohaddes, K., 2024. "Climate Policy and Sovereign Debt: The Impact of Transition Scenarios on Sovereign Creditworthiness," Janeway Institute Working Papers 2430, Faculty of Economics, University of Cambridge.
    • Handle: RePEc:cam:camjip:2430
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    References listed on IDEAS

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    More about this item

    Keywords

    Climate Policy; Credit Ratings; Sovereign debt; Transition Risks;
    All these keywords.

    JEL classification:

    • C53 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Forecasting and Prediction Models; Simulation Methods
    • E60 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - General
    • G20 - Financial Economics - - Financial Institutions and Services - - - General
    • H63 - Public Economics - - National Budget, Deficit, and Debt - - - Debt; Debt Management; Sovereign Debt
    • Q51 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Valuation of Environmental Effects
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming

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