European Central Bank

Financial stability in the age of artificial intelligence: the role of algorithmic architecture

05/21/2026 European Central Bank Central banks

Artificial intelligence (AI) is rapidly transforming financial decision-making. To explore the implications for financial stability we ran simulation-based experiments on two different AI architectures. We found that Q-learning algorithms, a form of reinforcement learning, achieved a high degree of coordination, but were prone to bank run-like dynamics. In contrast, large language models , which rely on contextual reasoning, were less prone to such runs but generated heterogeneous and unpredictable behaviour.

External finance premium: market finance versus bank finance

05/19/2026 European Central Bank Central banks

This paper is the first to simultaneously examine firms’ market-based and bank-based external finance premia and investigate the behavior of corporate bond markets in the United States and the euro area, with a focus on country- and state-level heterogeneity in monetary unions. Using a unique micro-level dataset, we show that market finance premia, measured with corporate bond spreads, are remarkably similar in both the euro area and the US in terms of how little they depend on the issuer’s state or country of origin.

The supply chain spillovers of private equity buyouts

05/19/2026 European Central Bank Central banks

We study how private equity (PE) buyouts propagate through supply chains using unique firm-to-firm transactions data from Belgium. In normal times, suppliers of PE-backed firms outperform their peers by 5%–10% in employment and sales growth, primarily due to increased input demand from PE-backed customers rather than knowledge spillovers or other mechanisms. In economic downturns, however, this outperformance is attenuated and suppliers compress markups by around 8% as PE investors intensify bargaining pressure and reconfigure supply chains to extract cost savings.

The role of judgement in supervisory scores and additional capital requirements assigned to banks

05/13/2026 European Central Bank Central banks

We empirically analyse the role of judgement in assigning overall scores by the euro area supervisors as part of the yearly Supervisory Review and Evaluation Process (SREP), which evaluates banks’ risks and sets supervisory actions. We also analyse its role in shaping the drivers of the Pillar 2 capital requirement (P2R) that banks must fulfil. We find that supervisors actively adjust the weight of the components of the overall score to reflect qualitative information, thereby smoothing fluctuations in the final assessment.

The role of biodiversity risk in shaping bank lending decisions

05/13/2026 European Central Bank Central banks

We examine whether banks incorporate firm-level biodiversity risk into their lending decisions. Using a large sample of syndicated loans matched to firm-level biodiversity risk measures, we document that borrowers with higher biodiversity risk face significantly higher loan spreads. Evidence on loan volumes is weaker, suggesting that banks primarily adjust along the pricing margin rather than restricting credit supply.

Wildfire cashflow shocks

05/12/2026 European Central Bank Central banks

This paper studies the impact on cashflows and financial decisions of firms affected by wildfires, focusing on the wildfires that occurred in Portugal in 2017. Using establishment-level data from the hotel industry combined with geospatial information on wildfire proximity and land use, we employ a difference-in-differences approach to study both directly and indirectly affected firms.

Supply chain uncertainty, energy prices, and inflation

05/12/2026 European Central Bank Central banks

Using U.S. and Euro area data, we document that (i) the pass-through of energy prices to inflation is state-dependent - stronger when supply chain uncertainty is elevated – and (ii) in such states, energy prices become more informative about logistical conditions. We develop a model in which firms combine energy and a specialized input transported through a capacity-constrained transportation network. When congestion binds, energy remains available in local markets at a premium, whereas the specialized input is subject to delivery delays.

Do lenders price diesel risk? Evidence from Dieselgate and low-emission zones in captive vs. independent banks

05/11/2026 European Central Bank Central banks

Transitioning to a sustainable economy and reducing air pollution hinge on appropriate economic incentives and financing conditions. The auto loan market offers a prime setting, as lenders’ credit terms can either discourage or incentivize the purchase of high-pollution vehicles. Using loan-level data, we examine how captive and independent banks adjust lending conditions in response to information and regulatory shocks affecting diesel vehicles.

Gas market shocks: tracing the effect on euro area inflation expectations

05/07/2026 European Central Bank Central banks

This paper examines the impact of natural gas market shocks on gas market dynamics, inflation expectations and realized inflation in the Euro Area using a BVAR model. Our contribution lies in a novel identification strategy that distinguishes between various types of shocks of unprecedented detail, leverages weekly rather than monthly data, and extends the analysis to both market-based headline and core inflation expectations.

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