Europe has spent years trying to create a capital market capable of directing household savings toward new companies, energy projects, defence investment and technology. Yet progress becomes more difficult whenever integration reaches the infrastructure behind financial markets. Exchanges, clearing houses, settlement systems and securities depositories are commercial businesses, but they are also strategically important national assets. That tension has returned to the centre of the European debate following renewed discussion of a possible combination between Euronext and Deutsche Börse.
No negotiations are currently taking place, and there is no formal transaction on the table. Nevertheless, the idea matters because a combination could create the largest exchange group in continental Europe. It would connect equity markets across France, Germany, Italy, the Netherlands and several other countries with major derivatives, clearing and settlement operations. The economic logic is relatively clear. The regulatory and political consequences are considerably more complicated.
A Combination of Much More Than Stock Exchanges
Euronext already operates markets in Amsterdam, Athens, Brussels, Dublin, Lisbon, Milan, Oslo and Paris. In 2025, the group generated €1.82 billion in underlying revenue and €1.14 billion in adjusted EBITDA. More than 1,700 listed companies had a combined market capitalisation of approximately €6.8 trillion, while Euronext accounted for around 64% of equity trading across its core markets.
Deutsche Börse has a broader position across the exchange value chain. Alongside Xetra and the Frankfurt Stock Exchange, the group controls Eurex, one of the world’s major derivatives markets, as well as Clearstream, a central provider of securities settlement, custody and collateral services. Deutsche Börse generated more than €6 billion in net revenue in 2025, including treasury-related income.
A combination would therefore involve much more than bringing two equity-trading platforms together. Clearing, settlement, derivatives, market data and securities custody would probably attract the greatest regulatory scrutiny. These businesses generate stable revenues, but they also form critical infrastructure used by banks, asset managers and competing trading venues.
Why Europe Is Looking for Greater Scale
The broader argument for consolidation is closely connected to Europe’s investment challenge. The European Commission estimates that the EU will require an additional €750–800 billion in investment every year through 2030. Defence expenditure creates further financing requirements. Bank lending alone is unlikely to meet these needs, particularly for technology companies, infrastructure projects and businesses with long investment horizons.
Europe does not lack savings. Around 70% of EU households’ financial savings, representing approximately €10 trillion, remain in bank deposits. The challenge is converting more of that capital into investment in European companies. Some savings remain inside the banking system, while other funds ultimately flow into deeper and more liquid US capital markets.
The difference is particularly visible in public equity markets. According to figures referenced in the source material, US companies generally receive higher valuations when going public, while the median valuation gap in some high-technology sectors can reach tenfold. Larger markets can create a reinforcing cycle: more issuers attract investors, deeper liquidity attracts additional issuers, and greater activity lowers barriers for future transactions.
An exchange merger would not remove differences in taxation, insolvency rules or pension systems. However, more integrated trading and post-trade infrastructure could reduce some cross-border costs and make European markets easier for international investors to navigate.
Integration Versus Competition
The main regulatory problem is that the economic benefits of integration can conflict directly with competition policy. A group controlling trading, clearing, settlement and market data could reduce duplication and achieve significant economies of scale. At the same time, greater vertical integration could increase the dependence of financial institutions and rival exchanges on a single infrastructure provider.
Europe has faced this dilemma before. The European Commission blocked Deutsche Börse’s proposed combination with NYSE Euronext in 2012 because of concerns about excessive concentration in European exchange-traded derivatives. In 2017, regulators also stopped Deutsche Börse’s proposed merger with London Stock Exchange Group amid competition concerns involving fixed-income trading and clearing.
The current environment is different. European policymakers are increasingly concerned not only with competition between individual exchanges but also with Europe’s ability to compete with the depth, liquidity and financing capacity of US markets.
The Political Question Behind the Transaction
Supervision could ultimately prove as important as valuation or transaction structure. The European Commission has supported stronger powers for the European Securities and Markets Authority, or ESMA, as part of efforts to reduce fragmented national oversight. A multinational infrastructure group operating across a large part of the euro area would strengthen the argument for more centralised European supervision.
National governments, however, have reasons to retain influence. Exchange infrastructure handles government bonds, collateral, derivatives and other instruments that become especially important during periods of financial stress. Control over these systems therefore has strategic and political significance as well as commercial value.
Several outcomes remain possible. Euronext and Deutsche Börse could pursue a full combination, integrate selected businesses or remain independent while cooperating on technology, market data and settlement standards. Each approach offers a different balance between scale, competition and national control.
The debate therefore goes beyond two companies. Europe wants deeper capital markets and more efficient use of its savings, but achieving those objectives may require governments to accept less national control over financial infrastructure. Any future Euronext–Deutsche Börse transaction would become an important test of how far Europe is prepared to go in turning capital-market integration from a policy objective into an operating reality.