European Central Bank Banking Supervision published the results of its 2026 thematic reverse stress test focused on geopolitical risks, an exercise in which banks were given a target of 300 basis points depletion of their common equity tier 1 (CET1) ratios and asked to design scenarios with a geopolitical risk narrative that would produce that outcome. The exercise covered 110 euro area banks directly supervised by the ECB; geopolitical risk is one of the ECB's supervisory priorities for 2026-28.
The exercise forms part of the ECB's broader supervisory work on geopolitical risk and aims to strengthen banks' forward-looking risk management and stress-testing capabilities in an environment of heightened geopolitical uncertainty. The exercise replaced an annual stress test that banks would otherwise have had to submit as part of their internal capital adequacy assessment process (ICAAP), helping to reduce compliance costs, the ECB said.
REVERSE METHODOLOGY, GEOPOLITICAL LENS
The ECB said the approach differs fundamentally from traditional stress tests, such as the biennial EU-wide stress test led by the European Banking Authority, in which all banks face the same scenario and the focus is on measuring the quantitative impact on capital; in a reverse stress test the emphasis is on banks' ability to analyse more broadly how geopolitical risks could affect their business models. In this case, banks were given a target of 300 basis points of CET1 depletion and asked to design scenarios with a geopolitical risk narrative that would result in that outcome.
Banks developed a wide range of geopolitical narratives, including military conflicts, trade, energy and supply chain disruptions, economic sanctions, macroeconomic shocks and cyber incidents, and most presented the real economy as the main transmission channel, followed by financial markets. The ECB said banks were generally able to produce economically meaningful scenarios, but it identified weaknesses in the granularity and sensitivity of risk assessments, the consistency between scenario narratives and their solvency and liquidity impacts, the realism of mitigating actions and the articulation of solvency-liquidity interactions.
SUPERVISORY FEEDBACK INTO CAPITAL DIALOGUE
The results will feed into the ongoing supervisory dialogue with banks and may inform qualitative assessments in the Supervisory Review and Evaluation Process (SREP), but the exercise will not lead to adjustments in Pillar 2 guidance or the leverage ratio Pillar 2 guidance. The ECB said it would follow up with banks whose liquidity metrics showed only a muted response to the capital decline, and with banks whose assumed mitigating actions, such as selling loan portfolios or raising capital at ambitious prices, appeared overly optimistic.
Cyber incidents and the disruption of services from third-party providers emerged as the most prominent non-financial threats, and the ECB called on banks to include operational resilience and cyber risk considerations in their stress-testing frameworks.
The ECB also stressed the key role banks' boards play in ensuring that scenario analysis and contingency planning are properly accounted for.