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André Nunes
- 19 November 2025
- MACROPRUDENTIAL BULLETIN - ARTICLE - No. 32Details
- Abstract
- Stress test simulations can enhance our understanding of the interplay between bank actions, the real economy and macroprudential buffers. Leveraging BEAST, the ECB’s workhorse top-down stress test model, this article explores impacts stemming from bank behavioural reactions by simulating them under the adverse scenario of the 2025 EU-wide stress test. The article shows that allowing banks to adjust their balance sheets only improves their capital ratios to a minor extent compared with simulations where they are assumed to keep their balance sheets constant. However, these reactions trigger negative credit supply shocks, exacerbating the downturn. Conversely, releasing available releasable buffers reduces banks’ incentives to deleverage and mitigates GDP contraction. These findings highlight how stress test simulations can inform macroprudential policy. More generally, they underscore the value of building sufficient releasable buffers during stable periods, to be used in times of stress to sustain credit supply to the real economy while preserving banks’ resilience.
- JEL Code
- G20 : Financial Economics→Financial Institutions and Services→General
G28 : Financial Economics→Financial Institutions and Services→Government Policy and Regulation
- 10 May 2024
- OCCASIONAL PAPER SERIES - No. 347Details
- Abstract
- This paper presents the updated macroprudential stress test for the euro area banking system, comprising around 100 of the largest euro area credit institutions across 19 countries. The approach involves modelling banks’ reactions to changing economic conditions. It also examines the effects of adverse scenarios as defined for the European Banking Authority’s 2023 stress test on economies and the financial system as a whole by acknowledging a broad set of interactions and interdependencies between banks, other market participants and the real economy. Our results highlight the resilience of the euro area banking system and the important role banks’ adjustments play in the propagation of shocks to the financial sector and real economy.
- JEL Code
- C30 : Mathematical and Quantitative Methods→Multiple or Simultaneous Equation Models, Multiple Variables→General
C53 : Mathematical and Quantitative Methods→Econometric Modeling→Forecasting and Prediction Methods, Simulation Methods
C54 : Mathematical and Quantitative Methods→Econometric Modeling→Quantitative Policy Modeling
E52 : Macroeconomics and Monetary Economics→Monetary Policy, Central Banking, and the Supply of Money and Credit→Monetary Policy