Competition Enforcement in Financial Services: Benchmarks, Interchange and Access

Competition law in financial services reached the sector late and then arrived with force: trading floors that had treated information sharing as market colour discovered it was cartel conduct, and payment schemes whose fee structures had operated for decades found them condemned as horizontal price fixing. This guide covers the benchmark cases, the interchange saga and the access theories, as part of the sector-enforcement pillar of our Competition & Antitrust hub.

How did trading-floor conduct become cartel enforcement?

Through chat rooms. Investigations into benchmark manipulation revealed that traders at competing banks maintained persistent private channels — with names that became evidence in themselves — in which they exchanged current and forward-looking information about orders, spreads, positions and intended submissions, and coordinated conduct. The Commission pursued these as horizontal infringements: Euro Interest Rate Derivatives and Yen Interest Rate Derivatives in 2013, forex spot trading in 2019 (the “Forex — Three Way Banana Split” and “Essex Express” settlements, roughly €1.07 billion), further forex and bond-trading decisions since, and the SSA and European government bond trading cases.

The legal analysis was orthodox — coordination between competitors on the parameters of competition — but the factual setting was novel enough to reshape bank compliance permanently. Communications surveillance, chat-channel restriction and approval, trader training built on real chat transcripts, and desk-level supervision all became standard because these cases showed that the sector’s normal social practice was, in law, a cartel. Our information-exchange guide covers the underlying doctrine; the financial-sector lesson is how easily professional norms drift across the line when nobody has ever framed the line for the people on the desk.

What did the interchange cases decide?

That collectively set default interchange fees restrict competition. In four-party card schemes, the issuing bank receives interchange from the acquiring bank on each transaction; because acquirers pass it through, it sets a floor under merchant service charges. The Commission condemned Mastercard’s multilateral interchange fees in 2007, and the Court of Justice upheld the decision in 2014, rejecting the argument that the fees were an objectively necessary ancillary restraint. Visa gave commitments capping its fees.

Legislation then took over: the Interchange Fee Regulation (2015) capped consumer card interchange at 0.2% (debit) and 0.3% (credit) within the EEA, and further Commission commitments extended caps to inter-regional transactions. But litigation continued — UK merchant claims against Visa and Mastercard have run for a decade through the Competition Appeal Tribunal and Supreme Court, establishing that the fees infringed and moving on to quantum and pass-on. For merchants, acquirers and scheme participants the practical position is now: fee levels are largely regulated, but scheme rules (honour-all-cards, surcharging restrictions, blending) remain contestable, and historic claims remain live where limitation permits.

What other theories apply in the sector?

Access to infrastructure and data: exclusion from payment systems, clearing, or — increasingly — account data. The German Federal Cartel Office’s Apple Pay NFC case and the Commission’s parallel proceedings, resolved by commitments opening the iPhone’s contactless chip to rival wallets, applied classic essential-facilities logic to a hardware layer, with direct consequences for banks and fintechs across Europe.

Collective boycotts and standard-setting: banks agreeing to withhold access from disruptive entrants (the Commission’s investigation into banks’ conduct toward fintech account-access services), and industry standards designed to disadvantage new business models. Merger control: banking consolidation, payments and market-infrastructure deals (exchanges, clearing houses, data providers) draw intense scrutiny, with the blocked Deutsche Börse/NYSE Euronext merger the sector’s landmark prohibition. And state aid remains structurally important since the financial crisis: bank rescues, restructuring plans and burden-sharing conditions run through the framework covered in our state aid guide.

What should financial institutions do?

Integrate competition into the conduct-risk framework rather than running it separately. Concretely: extend communications surveillance lexicons to cartel language (competitor names, price and spread discussion, coordination phrasing) and route hits to competition counsel; restrict and approve external chat channels with competitor institutions; and train by desk with real transcripts from the published cases, which are more persuasive than any abstract rule.

Add structural controls where competitor contact is institutional: industry associations and market-standard committees need agenda governance per our competitor-contact guide; syndication, club deals and joint bidding need clean-team protocols; and benchmark submission processes require documented independence. Finally, build the leniency reflex — the sector’s enforcement history shows that once one institution reports, the queue fills within days, and the difference between immunity and a nine-figure fine is measured in hours, as our leniency guide sets out.

How large is the damages exposure in this sector?

Larger than the fines, and unusually well organised. Interchange claims have run for a decade in the UK with merchants recovering substantial sums; forex and benchmark cartels produced collective proceedings before the Competition Appeal Tribunal and claims in the Netherlands and Germany; and the claimant base — merchants, corporates, funds — is sophisticated and often funded. Financial institutions therefore face a follow-on tail measured in years and, in aggregate, in billions.

Two features intensify it. Transaction data is exceptionally good, so quantum analysis is more tractable than in most cartel claims; and claimants are frequently the defendants’ own clients, which turns litigation strategy into a relationship question. Settlement dynamics reflect that — early, quiet settlements with major clients are common, and the litigated cases are typically those where the client relationship has already broken down. The mechanics are covered in our damages guide.

What is the position on information sharing between banks?

Permitted within the same aggregation discipline that applies everywhere, and genuinely necessary in places — credit bureaux, fraud databases and prudential reporting all involve shared data and are lawful where properly structured. The Court of Justice’s Asnef-Equifax judgment confirmed that credit-information systems can be compatible with competition law where access is non-discriminatory and the data does not reveal individual lenders’ commercial conditions.

The line falls where sharing touches competitive parameters: current or forward pricing, margin policy, planned product terms or client-level intelligence. The Spanish and Portuguese banking cases — the latter fining a long-running exchange of commercial-condition data between banks — show that even without any agreement on prices, systematic exchange of that character is itself the infringement.

Where is enforcement heading next in this sector?

Toward data, infrastructure and platform questions. Live themes include access to payment and account infrastructure for fintechs, the competitive effects of embedded finance and big-tech entry into payments, concentration in market-data and index provision, and the position of cloud providers as critical third parties to the financial system — a subject already occupying regulators and now competition authorities examining switching costs and lock-in.

Consolidation is the second front: banking, payments, asset management and market-infrastructure deals face structural scrutiny, with the blocked Deutsche Börse/NYSE merger still the reference for how narrowly infrastructure markets are defined. Institutions planning strategic transactions in these spaces should assume market definition at the layer level — clearing, listing, data, execution — rather than at the level of ‘financial services’.

What should a bank’s competition compliance program contain?

Beyond the general architecture in our compliance guide: desk-level training built on published transcripts; chat-channel governance with approval and archiving; surveillance lexicons tuned to cartel language rather than only market abuse; protocols for syndication, club deals and joint bidding; association and committee governance; and a rehearsed leniency escalation path with pre-mandated counsel in the main jurisdictions. The sector’s enforcement history shows each of these gaps being exploited in turn.

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