ECB Monetary Policy After Disinflation | Analysis

ECB Monetary Policy After Disinflation: Overview and Context

The European Parliament study on ECB monetary policy after the disinflation, prepared by economists Cinzia Alcidi (CEPS), Ignazio Angeloni (Bocconi and SAFE), and Cédric Tille (Graduate Institute, Geneva), provides a critical assessment of the European Central Bank’s position following the successful taming of the 2021-2023 inflation surge. Published ahead of the Monetary Dialogue with ECB President Christine Lagarde on 3 December 2025, the paper examines three fundamental questions confronting ECB monetary policy: how to define an equilibrium monetary stance, how to address divergent national inflation rates, and how to navigate the forces shaping global exchange rates.

The study arrives at a nuanced overall assessment. The monetary policy tightening enacted from July 2022 onwards proved effective, with euro area inflation now credibly anchored close to the 2% medium-term target. However, the authors argue that the ECB may have gone slightly too far in cutting rates, bringing the deposit facility to 2.00% and the real short-term rate to approximately zero. Nevertheless, they support the current “wait and see” approach as the appropriate strategy given the complex interplay of deflationary pressures from US tariffs, euro appreciation, and persistent structural challenges within the euro area economy.

The paper addresses this assessment against the backdrop of two consecutive rate-hold decisions at the September and October 2025 meetings, confirming the Governing Council’s shift from a forward-guidance framework to a data-dependent, meeting-by-meeting approach. This marks a significant departure from the communication strategy that characterized ECB policy for over a decade, raising its own set of challenges that the paper examines in depth.

Assessing the ECB Monetary Policy Stance and Deposit Facility Rate

The study provides a detailed assessment of the ECB monetary policy stance using a Monetary Condition Index (MCI) that captures both the interest rate channel and the exchange rate effect. After the aggressive tightening cycle that saw the deposit facility rate rise from -0.50% to 4.00%, the subsequent easing brought it back down to 2.00% by late 2025. The authors note that this level, combined with inflation near 2%, implies a real short-term rate close to zero — a notably accommodative stance by historical standards.

The interest rate policy divergence between the ECB and the Federal Reserve features prominently in the analysis. While both central banks tightened aggressively in response to the post-pandemic inflation surge, their subsequent paths diverged significantly. The Fed’s policy rate remained considerably higher, with the federal funds rate at 3.75-4.00% after cuts in September and October 2025, compared to the ECB’s 2.00% deposit facility rate. This differential reflects the different inflation dynamics and economic structures of the two economies, with US tariff-driven price pressures keeping the Fed more cautious about easing.

The paper argues that while the current ECB monetary policy stance may be marginally more accommodative than strictly necessary, the uncertainty surrounding the global environment — particularly the impact of US tariffs and the euro’s appreciation — justifies maintaining the current level rather than making further adjustments in either direction. The data-dependent approach allows the Governing Council to respond to incoming information without committing to a predetermined policy path.

ECB Monetary Policy and the Equilibrium Interest Rate Debate

One of the most intellectually significant contributions of the study is its discussion of the equilibrium interest rate — the theoretical rate at which monetary policy is neither stimulative nor restrictive. The ECB monetary policy debate around this concept has intensified as the post-disinflation environment forces policymakers to consider where the appropriate neutral rate lies. The study examines multiple estimates and methodologies, highlighting the inherent uncertainty in pinning down this crucial benchmark.

The authors note that estimates of the euro area’s neutral real interest rate range widely, from slightly negative to moderately positive, reflecting different modeling assumptions and data interpretations. This uncertainty has practical implications: if the neutral rate is close to zero, the current stance with a real rate near zero is approximately neutral. If the neutral rate is positive — as some post-pandemic structural changes might suggest — then the current stance is actually accommodative, potentially more so than intended.

The study also considers how structural factors may have shifted the equilibrium rate since the pre-pandemic period. Increased government borrowing for defence and infrastructure, the potential productivity boost from artificial intelligence adoption, and the restructuring of global supply chains could all push the neutral rate higher than the pre-2020 estimates suggested. These factors add complexity to the ECB’s already challenging task of calibrating monetary policy in an environment where traditional benchmarks provide less reliable guidance than in calmer times.

Quantitative Tightening and Long-Term Interest Rate Dynamics

The study provides a thorough assessment of the ECB’s quantitative tightening (QT) programme, which proceeds alongside interest rate policy as a second pillar of balance sheet normalization. The passive run-off of APP and PEPP portfolios — achieved by not reinvesting principal payments from maturing securities — has reduced the ECB’s balance sheet at a steady pace without triggering the market disruptions that some observers had feared.

A key finding is that the reduction in ECB holdings has been smoothly absorbed by private investors, predominantly foreign buyers. Sovereign bond spreads have behaved in an orderly manner throughout the process, suggesting that the market can comfortably absorb the additional supply created by the ECB’s withdrawal. This is a significant positive signal for the sustainability of quantitative tightening and reduces concerns about potential financial stability risks from further balance sheet reduction.

The analysis of long-term interest rates reveals that nominal 10-year yields have remained relatively stable, while real 10-year yields have evolved in line with changing inflation expectations. The study notes that the smooth absorption of QT by private markets reflects both improved market functioning and the attractiveness of euro area sovereign debt to foreign investors seeking diversification from dollar-denominated assets — a theme that connects directly to the paper’s analysis of exchange rate dynamics.

Inflation Differentials Across Euro Area Member States

Perhaps the most policy-relevant section of the study examines the persistent divergence in inflation rates across euro area member states — a challenge that a single monetary policy cannot directly address. The authors document that inflation differentials have been larger and more persistent following the 2021-2023 shock than those observed among US states, suggesting structural weaknesses in the functioning of the monetary union and the underlying single market.

The Baltic states — Estonia, Latvia, and Lithuania — experienced particularly elevated inflation rates during and after the shock, with levels significantly above the euro area average. While some convergence has occurred, the cumulative price gaps that have built up represent a meaningful divergence in competitiveness across the monetary union. The study applies both market exchange rate and purchasing power parity-based calculations to assess the extent of this dispersion, finding persistent heterogeneity under both approaches.

The policy implications are significant. Since the ECB sets a single interest rate for the entire euro area, persistent inflation differentials mean that the real monetary policy stance varies substantially across member states. Countries with above-average inflation effectively experience more accommodative conditions, while those with below-average inflation face relatively tighter policy. The authors argue that the ECB should systematically analyze the root causes of these differentials and communicate them to national and European policymakers, who have the tools to address the structural factors driving inflation divergence within the euro area.

Euro Exchange Rate Movements and Dollar Weakness in 2025

The study’s analysis of exchange rate dynamics reveals a puzzling pattern that has significant implications for ECB monetary policy after disinflation. The US dollar has weakened substantially since early 2025, but with a contrasting regional pattern: the dollar depreciated most against the euro and other advanced European currencies as well as Latin American currencies, while most Asian currencies remained relatively stable. This pattern suggests the emergence of two currency “blocs” — one centred on a weakening dollar including several Asian countries, and another centred on strengthening European and Latin American currencies.

The traditional expectation would be for US tariffs to strengthen the dollar by reducing import demand. The study systematically examines and largely dismisses the conventional explanations for the dollar’s unexpected weakness. Monetary policy differentials do not explain the movement, as the interest rate gap between the Fed and the ECB actually favors the dollar. Foreign retaliation to US tariffs has been too moderate to account for the exchange rate shift. And there is no clear evidence of a net reduction in capital flows to the United States that would explain the depreciation.

Instead, the authors attribute the dollar weakness to reduced confidence in dollar-denominated assets amid growing uncertainty about US economic policies. The tariff announcements and broader policy unpredictability have eroded the dollar’s traditional safe-haven appeal, prompting foreign investors to hedge their existing dollar positions to an unprecedented extent. This hedging activity itself creates selling pressure on the dollar, contributing to a self-reinforcing cycle of depreciation that the study identifies as the most plausible explanation for the observed exchange rate movements.

Capital Flows, Tariffs, and Global Currency Bloc Dynamics

The study’s examination of capital flows provides valuable context for understanding the evolving global monetary landscape that shapes ECB monetary policy. Analysis of gross capital flows to and from the United States shows that despite the dollar weakness, there has been no dramatic reversal of capital inflows. The volume of foreign investment into US assets remained substantial through the first half of 2025, suggesting that the currency depreciation is driven more by hedging behavior than by outright capital flight.

Euro area capital flow data reveals complementary dynamics. Inflows to European assets have increased, consistent with the euro’s appreciation and the growing attractiveness of diversification away from dollar exposure. The study examines whether changes in world currency reserves explain the exchange rate movements, concluding through a dedicated analytical box that reserve composition shifts are not a primary driver. Instead, the pattern reflects portfolio-level decisions by institutional investors who maintain their dollar allocations but increasingly hedge the currency risk.

The tariff dimension adds further complexity. US tariffs on imports have escalated through multiple rounds, with different rates applied to different trading partners. The study’s analysis of US economic policy uncertainty shows a dramatic spike following the April 2 tariff announcements, which has gradually moderated but remains elevated. This uncertainty, rather than the tariffs themselves, appears to be the primary channel through which trade policy affects exchange rates — a finding with important implications for how the ECB factors trade policy uncertainty into its monetary policy decisions.

ECB Communication Strategy Challenges After Forward Guidance

The final substantive section of the study addresses a critical operational challenge for ECB monetary policy after disinflation: communication. The shift from forward guidance — which aimed to steer market expectations about the future rate path — to a meeting-by-meeting, data-dependent approach represents a fundamental change in how the ECB signals its intentions. The study identifies several factors that make this transition particularly challenging in the current environment.

First, the move to a more decentralized messaging framework, with individual Governing Council members expressing diverse views more openly, creates potential for mixed signals. While intellectual diversity strengthens the quality of deliberations, it can complicate market interpretations if messages appear contradictory. Second, increased forecast uncertainty — driven by trade policy volatility, geopolitical risks, and structural shifts in the global economy — makes it inherently harder for the ECB to provide clear guidance about future policy actions.

Third, persistent inflation divergence across member states means that any single policy message will be received differently across the euro area. A signal that rates are appropriate for the aggregate may be perceived as too loose in high-inflation countries and too tight in low-inflation ones. The study argues that standardized statements help maintain consistency but offer less insight into internal deliberations, potentially prompting overreactions to minor linguistic changes — a phenomenon well-documented in central bank communication research. The authors recommend that the ECB invest in clearer communication of its analytical framework and the factors driving its decisions.

Policy Implications for the Euro Area Monetary Union

The study concludes with a forward-looking assessment that connects the three analytical threads — monetary stance, inflation differentials, and exchange rate dynamics — into a coherent policy framework. The central message is that while ECB monetary policy has been largely successful in restoring price stability at the aggregate level, the challenges facing the euro area are increasingly structural rather than cyclical. The persistent inflation gaps across member states, the shifting dynamics of global capital flows, and the evolving role of the euro in the international monetary system all require responses that extend beyond monetary policy alone.

The authors call on the ECB to play a more proactive role in analyzing and communicating cross-country inflation differentials, even though addressing their root causes falls primarily within the competence of national governments and European institutions. By raising awareness of the structural weaknesses that drive these divergences, the ECB can contribute to the political momentum needed for deeper single market integration, structural reforms, and improved economic governance within the monetary union.

On exchange rates, the study cautions against overreacting to the euro’s appreciation while acknowledging its implications for the effective monetary stance. A stronger euro has a deflationary impact that could complement the current policy rate in restraining price pressures, but it also weighs on export competitiveness at a time when the euro area manufacturing sector is already under pressure from tariffs and global uncertainty. The balance of these effects will be a key factor in the Governing Council’s ongoing assessment of whether the current policy stance remains appropriate or whether adjustments are needed as the global environment continues to evolve.