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Beyond T+1: Charting the Transformation of Europe’s Post-Trade Landscape

The Future of Custody  •  Article  •  June 16, 2026
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KEY HIGHLIGHTS

  • Europe's post-trade landscape is highly fragmented, impacting capital formation, liquidity, and costs
  • The shift to T+1 is a key operational step, but it's part of a broader, deliberate transformation to address market fragmentation
  • Multiple initiatives are driving a harmonization movement to create a more integrated and consistent European post-trade environment

Armanda Mago
Head of Europe Strategy and
Change Management, Citi

Europe’s capital market infrastructure currently exists as an array of often unconnected trading venues, clearing houses, and settlement systems. Our recent Reimagining Europe Markets Report paints a nuanced picture of this landscape. The analysis shows that while many feel progress has been made, only 7% of market participants consider Europe’s post-trade environment to be highly harmonized. Instead, a significant 63% view the landscape as moderately harmonized but still characterized by critical gaps in regulation and operational consistency. This disjointedness has direct implications for capital formation, liquidity, and overall costs.

While shortened settlement cycles are a primary focus for the industry, focusing on them in isolation risks missing the bigger picture. T+1 is a significant operational milestone, but it is not a solution for the deep-seated structural fragmentation that still characterizes the region. These two challenges are distinct; T+1 addresses the speed of the cycle, whereas the broader transformation involves a fundamental reimagining of the market's architecture. In that context, while T+1 is top of mind for all participants, it is just one part of a busy market transformation agenda across European markets.

A market in motion 

Across Europe, a growing harmonization movement is unfolding through a series of overlapping initiatives, each addressing a different aspect of post-trade complexity. Efforts to standardize corporate processing, such as the CA4U (Corporate Actions for You) project, are reducing long-standing inconsistencies in how events are managed across markets. At the same time, settlement infrastructures are being reshaped by programs designed to move clients away from legacy account structures toward more unified, interoperable models. Elsewhere, investment in central bank money settlement and closer alignment between clearing and settlement ecosystems is creating new efficiencies in how transactions are completed.

Other critical projects driving this transformation include: 

  • Euronext Securities CA4U1: Designed to modernize and harmonize post-trade corporate action processing across its CSDs, particularly in Italy and the Nordics, ensuring compliance with ECB standards. 

  • Clearstream’s Project UNO2: A strategic initiative migrating clients from legacy 6-series accounts to a unified, T2S-eligible structure to strengthen post-trade efficiency.   

  • Euroclear Bank CeBM Migration3: A significant milestone for 2030 allowing clients to settle via T2S using Central Bank Money (CeBM).   

  • Euroclear and LCH SA Partnership4: Enabling clearing members to settle Italian government debt (cash and repo) directly within the Euroclear Bank ICSD. 

  • Euronext CSD Convergence Programme5: A strategic initiative (2021–2027) creating a unified post-trade infrastructure across Euronext’s CSDs in Milan, Oslo, Copenhagen, and Porto.   

  • Euronext Clearing (BITA)6: The migration of Borsa Italiana markets to a new Core Clearing System to centralize clearing services.   

Beyond these ecosystem-wide projects, individual market infrastructures are also driving change. SIX, for instance, is pursuing a strategy to create a more integrated pan-European offering. A key component of this is their project to merge the Spanish and Swiss CCPs and consolidate their CSD platforms. This initiative aims to create a more unified service offering and a single point of entry for clients, which would help address the fragmentation our report identifies. It serves as an example of the consolidation that can contribute to a more competitive European market.

Progress, but not yet convergence 

Individually, these developments can appear purely technical in impact. Taken together, they signal something more fundamental: a coordinated move towards a more consistent and integrated post-trade environment.

The Citi research highlighted earlier shows a market that is evolving, but not yet aligned. While a majority of respondents acknowledge that progress has been made, they are equally clear that meaningful gaps remain. These gaps are deeply embedded within a number of infrastructures operating across Europe, in the divergence of legal and regulatory frameworks, and in the operational practices that vary from one market to another. Even where technology platforms have advanced, differences in process and interpretation create friction.

This is why harmonization in Europe has always been a gradual process, reflecting the cumulative effect of many changes over time.

Engineering Europe’s integrated market 

Seen through this lens, the transition to T+1 introduces a new level of discipline across the post-trade lifecycle. Shorter settlement cycles leave less room for manual intervention, less tolerance for inconsistency and less flexibility in how processes are managed. As a result, they create a natural impetus for the standardization and automation required for the success of larger initiatives.

T+1 also brings Europe closer in sync with other major markets, helping reduce operational friction for global investors and supporting more efficient cross-border capital flows. But perhaps its most important role is the pressure it places on the system to evolve. One of the clearest messages from Citi’s analysis is that a more integrated European market will not emerge organically. It is being actively engineered.

What this means for clients 

For clients, this period of transformation brings both challenge and opportunity. In the near term, the environment becomes more demanding. Multiple change programs are progressing in parallel, each requiring investment, adaptation and careful coordination. T+1 adds further urgency, compressing timelines and increasing the need for operational precision. Over time, however, the benefits are expected to take shape. A more harmonized post-trade ecosystem has the potential to reduce complexity, improve efficiency and make it easier to access opportunities across borders. It is these longer-term outcomes that underpin the industry’s focus on integration.

T+1 will continue to dominate industry attention in the years ahead. It is an important milestone and a necessary step forward. But it is not the end state. The real transformation lies in how Europe is rethinking its post-trade infrastructure - moving, gradually but deliberately, from fragmentation towards greater cooperation and standardization. It is a process that will take time, coordination and sustained investment.

For market participants, the priority is not only to prepare for T+1, but to understand the broader trajectory. Because it is this wider transformation that will ultimately define the future of European capital markets.


1 https://www.euronext.com/en/euronext-securities/convergence 
2 https://www.deutsche-boerse.com/resource/blob/3773180/c51a82b0a08f9a71d41a921e2dd3132e/data/White-paper_Project-UNO.pdf

3 https://www.ecb.europa.eu/paym/groups/amiseco/shared/pdf/20240126_ami-seco_report_on_the_compliance_of_euroclear_bank_with_the_t2s_standards.en.pdf

4 https://www.lseg.com/en/media-centre/press-releases/2025/lch-sa-and-euroclear-partner-streamline-settlement-italian-government-debt

5 https://www.euronext.com/en/euronext-securities/convergence

6 https://www.euronext.com/en/clearing/euronext-clearing-services/borsa-italiana-markets-migration 

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