Climate change is a ticking time bomb for the financial sector, and stress testing is the key to defusing it. This article delves into the intricate world of integrating climate risks into the 2025 EU-wide stress test, a critical exercise for assessing the resilience of banks to the potential shocks of a warming planet. But here's where it gets controversial: the findings suggest that the banks most exposed to climate-related losses may not be the ones we think they are. Are we missing something in our risk assessments? Let's find out.
The authors, Aurora Abbondanza, Marianna Caccavaio, Valentina Gattinoni, and Oana Maria Georgescu, published this work in the Macroprudential Bulletin 32 in November 2025. They argue that while long-term climate risks have received significant attention, short-term risks, such as acute weather events and abrupt policy shifts, can also have immediate and significant impacts on financial institutions. This is where the stress test comes in.
The analysis uses a top-down approach, incorporating both transition and acute physical climate risks into credit risk assessments for non-financial corporations. The focus on credit risk is justified, as it is a significant driver in supervisory stress tests, and the transmission channels from climate shocks to credit risk are better understood and reflected in banks' models compared to other risk drivers.
The study reveals that transition risks, driven by green investments to reduce emissions, amplify credit losses and reduce banks' Common Equity Tier 1 (CET1) capital, especially in high energy-intensive sectors. Similarly, acute physical risks, like extreme flood events, reduce CET1 capital through direct damage, local disruptions, and macroeconomic spillovers. The magnitude of these impacts varies across banks, but both types of climate risk can have a moderate yet consequential effect on capital ratios.
Interestingly, the authors find that the banks most exposed to climate-related losses may differ from those identified as the most vulnerable in the broader EU-wide assessment. This finding underscores the importance of incorporating both types of climate risk into regular financial stability assessments and highlights the need for a more nuanced understanding of climate risk exposure.
The article also discusses the EBA's proposed framework for climate stress testing, which aims to ensure proportionality and simplification while leveraging the existing EU-wide stress test infrastructure. This framework will be tailored to individual institutions' size, risk profile, and climate risk exposure, and it will align with the EU-wide stress test in terms of data definitions, reporting processes, scenarios, and methodological design.
Furthermore, the authors emphasize the importance of an integrated approach to climate stress tests. When executed well, these tests can help banks perform better and meet regulatory expectations. Euro area banks are increasingly using climate stress tests to inform required disclosures and strategic choices, demonstrating the evolving nature of this field.
In conclusion, this article provides a comprehensive analysis of the effects of climate risks on banks' resilience, highlighting the importance of incorporating both transition and physical climate risks into financial stability assessments. The findings suggest that a nuanced understanding of climate risk exposure is crucial, and the EBA's proposed framework for climate stress testing offers a promising approach to addressing these challenges. But the question remains: are we doing enough to protect our financial system from the looming threat of climate change? The debate is open, and your insights are welcome.
