European Union

Source : © European Union, 2026 - EP

By David Howarth (University of Luxembourg) and Lucia Quaglia (University of Bologna)

Financial market integration has been a core objective of European integration since the 1950s. Over several decades, the European Union (EU) has adopted hundreds of legislative acts aimed at removing barriers to cross-border finance and harmonising the regulation and supervision of capital markets. Yet progress has been uneven, contested, and repeatedly repackaged.

The most recent example is the transformation of the Capital Markets Union (CMU)—launched in 2015, relaunched in 2020, and rebranded as the Savings and Investments Union (SIU) in early 2025. Our recent article with JCMS examines key policy narratives—the causal stories policymakers use to justify and promote specific reforms— that have been used to promote CMU over time. We find it surprising that—despite the importance of financial market integration for EU economic growth—the Commission has strategically promoted the policy through a variety of narratives linked to policy goals that have greater support among member state governments and public opinion.

A technical project with broad ambitions

Financial market integration is, at its core, a technical policy area. It primarily concerns banks, non-bank financial firms (e.g., asset management), stock exchanges, clearing houses, and supervisors. For most citizens—and many politicians—it remains remote and opaque. Yet over time, EU institutions have increasingly presented financial integration as a solution to a wide range of broader economic and political challenges — notably, the digital and green transitions, and European competitiveness in relation to the United States and China.

This expanding ambition is also visible in the shift from CMU to SIU. What began as a project to deepen European capital markets has been reframed as a tool to support economic growth, finance the green and digital transitions, strengthen Europe’s geopolitical position, and mobilise household savings for long-term investment. Rather than abandoning a stalled project, EU policymakers have repeatedly changed the story told about it.

To explain this strategy, we adopt an actor-centred constructivist perspective, which highlights how purposeful actors deploy ideas strategically to build political support for a policy. In particular, we examine how EU supranational actors use policy narratives to widen support for a highly contested integration project.

Five narratives for one project

Drawing on a qualitative and quantitative analysis of 421 public speeches delivered between 2014 and 2024 by senior officials at the European Commission, the European Central Bank (ECB), and the three European Supervisory Authorities (ESAs), we identify five main policy narratives used to promote financial market integration.

First, CMU has been framed as a way to create new opportunities for European financial firms, enhancing their competitiveness and scale. Second, it has been presented as a mechanism to increase private funding for the real economy, especially for small and medium-sized enterprises. Third, EU officials have linked CMU to the green and digital transitions, portraying integrated capital markets as essential to financing climate action and technological innovation. More recently, a fourth narrative has gained prominence: financial integration as a response to geopolitical and geoeconomic challenges, notably Europe’s lagging competitiveness relative to the United States and China. Finally, a fifth narrative focuses on long-term investment and savings, emphasising the need to channel Europe’s high household savings into productive investment—an argument central to the rebranding of CMU as SIU.

These narratives overlap, but their relative importance has shifted over time, reflecting changing economic conditions and political priorities. The evolution of CMU narratives closely tracks broader shifts in EU policy priorities. In its early phase, CMU was tied to post-crisis economic recovery and investment, notably through the Juncker Plan. After 2020, it became increasingly linked to financing the green and digital transitions. Following the pandemic, Russia’s invasion of Ukraine, and growing global economic fragmentation, geopolitical narratives moved to the fore.

The latest rebranding as Savings and Investments Union builds on these earlier narratives while adding a new emphasis on retail savings. Influential reports by Enrico Letta and Mario Draghi have reinforced the argument that Europe must better mobilise household savings to support long-term investment and competitiveness. The shift also reflects an effort to make financial integration appear more relevant to citizens, not only as workers or consumers but as savers and investors.

Why progress towards CMU has been so difficult

The repeated reframing of CMU reflects the deeply contested political economy of financial market integration. CMU is not a single reform but a bundle of measures, including supervisory centralisation, tax harmonisation, insolvency law reform, market infrastructure consolidation, and the expansion of non-bank finance.

Each of these elements creates winners and losers across and within member states. Large economies may favour stronger EU-level supervision, while smaller states resist it. Countries with low corporate taxes oppose harmonisation, while others push for it. Banks often support securitisation reforms but resist measures that increase competition from non-bank intermediaries.

As a result, stable coalitions in favour of CMU have been hard to build. EU officials themselves have acknowledged that national vested interests have repeatedly stalled or diluted reforms. In this context, policy narratives become a key political tool. By linking financial market integration to widely supported objectives—such as climate policy, innovation, or strategic autonomy—EU institutions seek to expand the boundaries of the issue and attract new supporters beyond the financial sector.

The limits of narrative power

Our findings highlight both the strategic use and the limits of policy narratives. EU supranational actors clearly act as ideational entrepreneurs, flexibly reframing financial market integration to align with the priorities of the moment. This confirms the importance of ideational power for institutions that lack strong coercive tools. At the same time, repeated shifts in narrative have not delivered a decisive breakthrough in financial market integration. Despite more than a decade of reframing, CMU—and now SIU—remains incomplete. Narratives can attract attention and broaden debate, but they cannot eliminate underlying distributional conflicts.

The story of CMU and SIU thus illustrates a broader dynamic of European integration: when political consensus is elusive, projects persist not by succeeding, but by being continuously reinterpreted. Whether the latest narrative centred on savings and investment will finally unlock significant progress remains an open question.

David Howarth has been a Full Professor of Political Science at the University of Luxembourg since 2012 and was previously a Jean Monnet Chair at the University of Edinburgh. He researches on European economic governance / political economy topics and specifically financial regulation and Economic and Monetary Union. He is the author or co-author of six monographs, a textbook, over seventy peer-reviewed journal articles and dozens book chapters. He has also edited or co-edited fifteen journal special editions and six volumes on these topics including, most recently (with Judith Clifton and Daniel Fuentes), Regional Development Banks in the World Economy (OUP, 2021). His most recent monographs are Banking on Europe: How the European Commission became a semi-sovereign borrower (OUP, 2026, with Dermot Hodson et al.), Bank Politics (OUP, 2023, with Scott James) and The Political Economy of Banking Union (OUP, 2016, with Lucia Quaglia).

Lucia Quaglia (DPhil Sussex, MA Sussex) is Professor of Political Science at the University of Bologna. Previously, she was Professor at the University of York. She has published 9 books, 7 of which with Oxford University Press. Her most recent book is The Perils of Internal Regime Complexity in Shadow Banking, Oxford University Press. She has guest co-edited seven special issues of academic journals, including the Journal of European Public Policy, New Political Economy, Review of International Political Economy, Journal of Common Market Studies, and Journal of European Integration. She has published more than 60 articles in refereed academic journals in the fields of public policy, political economy, and EU studies. Together with Manuela Moschella and Aneta Spendzharova she has edited the textbook European Political Economy, Oxford University Press, 2024.

The post From Capital Markets Union to Savings and Investments Union: Why the EU keeps changing the story on financial integration appeared first on Ideas on Europe.

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