Competition Law and Financial Infrastructure Monopolies

1. Introduction

Financial infrastructure consists of the systems and institutions that enable financial transactions to occur safely and efficiently. It includes:

• payment-card networks;
• payment and settlement systems;
• stock and derivatives exchanges;
• central securities depositories (CSDs);
• clearing houses and central counterparties (CCPs);
• securities settlement systems;
• financial messaging networks;
• trading and post-trading platforms;
• ATM and payment-switch infrastructure; and
• increasingly, digital payment and financial-data infrastructure.

These markets have unusual competition characteristics. Network effects, interoperability requirements, high fixed costs, regulatory barriers, switching costs and economies of scale can cause one infrastructure provider to become dominant or even effectively indispensable.

Competition law does not generally prohibit monopoly or dominance by itself. The central issue is whether market power is acquired or maintained through exclusionary, discriminatory, exploitative or otherwise anti-competitive conduct.

2. Meaning of a Financial Infrastructure Monopoly

A financial infrastructure monopoly exists where one undertaking or infrastructure controls a substantial portion—or effectively all—of a relevant infrastructure market.

Examples include:

1. a single securities depository controlling settlement of a class of securities;
2. a dominant payment network processing a large proportion of transactions;
3. a dominant exchange controlling access to a particular trading segment;
4. a CCP becoming indispensable for clearing particular products;
5. a payment switch controlling access between banks;
6. a dominant financial-data or messaging infrastructure provider.

The monopoly can arise because of:

• natural economies of scale;
• network effects;
• regulatory licensing;
• interoperability advantages;
• accumulated transaction data;
• historical incumbency;
• technical standards;
• switching costs;
• control of critical interfaces; and
• vertical integration.

The competition-law problem becomes particularly serious where the infrastructure operator uses its position to exclude competitors who depend upon access to the infrastructure.

3. Why Financial Infrastructure Markets Are Different

A. Strong network effects

The value of a payment or financial network generally increases as more participants join.

For example:

More merchants → more cardholders want the network → more banks join → more merchants accept the network.

This can produce a self-reinforcing feedback loop.

Consequently, a competitor may find it difficult to enter even when it has superior technology.

B. Economies of scale

Financial infrastructure usually involves significant fixed costs.

A payment network or clearing system must invest in:

• cybersecurity;
• technology;
• connectivity;
• compliance;
• risk management;
• settlement systems;
• disaster recovery; and
• regulatory infrastructure.

Once the infrastructure has been established, the marginal cost of processing another transaction can be relatively low.

This may naturally favour concentration.

C. Interoperability

Competition can depend upon whether competing systems can communicate with one another.

A dominant infrastructure operator may therefore have an incentive to:

• deny interoperability;
• delay API access;
• impose discriminatory technical standards;
• restrict connectivity;
• refuse data access; or
• make migration technically difficult.

Such conduct can convert technological superiority into durable market foreclosure.

4. Relevant Market Definition

The first legal question is normally:

What exactly is the relevant financial infrastructure market?

The market could be defined narrowly as:

• payment-card network services;
• securities settlement services;
• clearing services;
• exchange-traded currency derivatives;
• ATM switching;
• payment processing; or
• financial messaging.

Alternatively, authorities may examine broader substitutability.

The distinction is critical.

For example, a stock exchange may have significant market share overall but face substantially different competitive conditions in:

equity trading → derivatives → currency derivatives → commodities.

The Indian MCX Stock Exchange v. NSE proceedings illustrate this point: the CCI treated stock-exchange services for exchange-traded currency derivatives as a distinct relevant market.

5. Sources of Monopoly Power

1. Network effects

The established network becomes more valuable because of its existing users.

2. Switching costs

Banks and merchants may face substantial costs when moving from one infrastructure provider to another.

3. Data advantages

Historical transaction data can strengthen a dominant infrastructure operator's ability to improve products and maintain its position.

4. Interoperability control

Control over APIs, interfaces or technical standards can create exclusionary leverage.

5. Regulatory barriers

Financial infrastructure frequently requires licensing and regulatory approval.

6. Liquidity concentration

Trading markets exhibit particularly strong liquidity effects. Traders often prefer the venue where the greatest number of counterparties are already present.

7. Vertical integration

An infrastructure operator may participate simultaneously in:

trading → clearing → settlement → custody → data.

This can create opportunities for leveraging dominance between vertically related markets.

6. Principal Competition-Law Concerns

A. Refusal to deal or provide access

A dominant financial infrastructure provider may refuse access to:

• competing banks;
• payment processors;
• exchanges;
• clearing participants;
• custodians;
• fintech firms; or
• competing networks.

Where access is indispensable, competition law may examine whether the refusal constitutes exclusionary abuse.

The Clearstream litigation is particularly important in this regard.

B. Discriminatory access

A dominant infrastructure provider may provide access to its own affiliates or preferred participants on better terms than competitors.

Potential discrimination may involve:

• connection fees;
• settlement charges;
• processing priority;
• technical specifications;
• API access;
• data access;
• latency;
• collateral requirements; or
• onboarding procedures.

C. Excessive or discriminatory pricing

A monopoly infrastructure operator may potentially impose:

• excessive transaction charges;
• discriminatory settlement fees;
• discriminatory connectivity fees; or
• unreasonable access charges.

Pricing analysis must nevertheless take account of infrastructure costs, risk, innovation and legitimate commercial justification.

D. Predatory pricing

A dominant exchange or payment platform may price below sustainable economic levels in order to eliminate competitors.

The Indian MCX-SX v. NSE case provides a particularly important example involving zero transaction pricing in currency derivatives. The CCI majority treated NSE as dominant and found the zero-price strategy abusive under Section 4 of the Competition Act, 2002.

There was, however, a dissenting view within the CCI concerning dominance and predatory pricing.

7. Important Case Laws

1. Clearstream Banking AG & Clearstream International SA v. Commission, Case T-301/04

This is one of the most directly relevant financial-infrastructure competition cases.

Clearstream operated securities clearing and settlement infrastructure in Germany. The European Commission found that Clearstream had abused its dominant position by:

• refusing to provide certain clearing and settlement services to Euroclear Bank;
• delaying access for an unreasonable period; and
• applying discriminatory pricing.

The Commission's decision concerned Article 82 EC, the predecessor of Article 102 TFEU. The General Court subsequently dismissed Clearstream's action challenging the Commission decision.

Principle

A dominant financial infrastructure operator cannot necessarily use control over essential post-trading infrastructure to disadvantage competing financial institutions.

Significance

The case demonstrates the importance of:

• access;
• non-discrimination;
• reasonable technical onboarding;
• interoperability; and
• fair pricing.

It is therefore a leading example of the application of dominance principles to financial market infrastructure.

2. MCX Stock Exchange Ltd. v. National Stock Exchange of India Ltd., CCI Case No. 13/2009

This is a major Indian financial-infrastructure competition case.

MCX-SX alleged that NSE abused its dominant position in the currency-derivatives exchange market by, among other things, charging zero transaction fees.

The CCI identified the relevant market as:

stock-exchange services for exchange-traded currency derivatives in India.

The majority concluded that NSE possessed a dominant position and considered its zero-pricing strategy abusive, including its effect on competitors and its relationship with other NSE business segments.

The CCI directed NSE to cease the relevant exclusionary conduct and maintain separate accounts for its different segments.

Principle

A dominant financial infrastructure provider cannot necessarily use financial strength obtained in one market to protect or establish dominance in another market.

Competition concepts

The case is important for:

• cross-subsidisation;
• leveraging;
• predatory/zero pricing;
• market definition;
• exclusionary conduct;
• financial strength; and
• access to exchange infrastructure.

3. United States v. Visa U.S.A., Inc., 344 F.3d 229 (2d Cir. 2003)

The U.S. Department of Justice challenged Visa and MasterCard practices affecting competition between payment-card networks.

The litigation concerned, among other matters, rules restricting member banks from issuing cards on competing networks such as American Express and Discover.

The district court found market power in the general-purpose card-network services market, and the Second Circuit upheld the relevant findings concerning the exclusionary rules.

Principle

A network possessing substantial market power may violate competition law where its rules prevent participants from dealing with competing networks and thereby foreclose rivals.

Importance

The case demonstrates how:

network membership + exclusionary rules + market power

can create significant barriers to entry.

It is especially relevant to financial infrastructure because payment networks depend upon banks, merchants and consumers simultaneously participating in the system.

4. Mastercard Inc. v. Commission, European Union

The European Commission's Mastercard interchange-fee proceedings concerned multilateral interchange fees within the Mastercard payment system.

The Commission concluded that Mastercard's arrangements restricted competition, and the General Court upheld the Commission's central findings concerning the relevant interchange arrangements.

The case illustrates how competition law can apply to rules established within a payment network even where the rules are part of the technical architecture necessary for operating the system.

The broader legal significance is the recognition that payment networks are multi-sided markets in which decisions concerning one side can affect competition on another.

5. Budapest Bank Nyrt. and Others, Case C-228/18

In Gazdasági Versenyhivatal v. Budapest Bank Nyrt. and Others, the Court of Justice considered an agreement concerning interchange fees between financial institutions and Visa/Mastercard.

The CJEU explained that an agreement fixing interchange fees cannot automatically be classified as a restriction of competition by object merely because it concerns prices. The economic and legal context must be examined to determine whether the agreement reveals a sufficient degree of harm to competition.

Principle

Competition analysis of financial infrastructure agreements must consider:

• the structure of the payment system;
• economic context;
• market functioning;
• competitive effects; and
• the actual purpose and consequences of the arrangement.

Importance

It prevents simplistic analysis of financial infrastructure merely because a fee or price is involved.

6. Sainsbury's Supermarkets Ltd v. Mastercard Incorporated

The UK Supreme Court considered litigation concerning Mastercard's multilateral interchange fees.

The Court described how the MIF operated between issuing and acquiring banks and how the fee was ultimately reflected in merchants' costs. The case raised questions concerning whether the interchange arrangements restricted competition under Article 101 TFEU and how damages and counterfactual analysis should be approached.

Principle

Payment infrastructure rules can have substantial effects on downstream merchants even though the relevant fee is formally imposed between financial institutions.

Competition significance

The case demonstrates the importance of analysing the entire economic chain:

card network → issuing bank → acquiring bank → merchant → consumer.

7. Ohio v. American Express Co., 585 U.S. ___ (2018)

The U.S. Supreme Court addressed American Express's anti-steering rules.

The Court held that credit-card networks are two-sided transaction platforms and that the two sides—cardholders and merchants—must generally be considered together when analysing the relevant market.

The Court concluded that the plaintiffs had not established the required anticompetitive effects in the two-sided market.

Principle

Competition analysis of financial infrastructure cannot necessarily examine only one side of a platform.

For example:

higher merchant fees

cannot automatically be treated as anticompetitive without considering:

cardholder benefits + network participation + output + innovation + overall transaction effects.

Significance

This is particularly important for modern:

• payment platforms;
• digital wallets;
• fintech ecosystems;
• payment gateways; and
• financial marketplaces.

8. Comparative Case-Law Table

9. Essential-Facilities Dimension

Financial infrastructure monopolies frequently raise the essential-facilities problem.

The basic question is:

When does a dominant infrastructure operator have a competition-law obligation to provide access to competitors?

The strongest case normally exists where:

1. the infrastructure is genuinely indispensable;
2. duplication is economically or technically impracticable;
3. refusal eliminates or seriously restricts competition;
4. access can be technically provided; and
5. there is no adequate objective justification for refusal.

However, competition law should not automatically transform every dominant infrastructure provider into a regulated common carrier.

There must be a careful distinction between:

legitimate commercial refusal

and

exclusionary refusal designed to protect monopoly power.

Clearstream is particularly instructive because the infrastructure's role in securities settlement made access conditions central to the competitive analysis.

10. Interoperability and Access Remedies

Competition authorities may consider remedies such as:

A. Non-discriminatory access

A dominant infrastructure operator may be required to provide equivalent access to similarly situated competitors.

B. Interoperability

Competing systems may be required to communicate through common technical standards.

C. API access

A dominant platform may be required to provide reasonable technical access where withholding it forecloses competitors.

D. Separation of functions

A vertically integrated infrastructure operator may be required to maintain organisational or accounting separation between:

• infrastructure;
• trading;
• clearing;
• settlement;
• data; and
• downstream services.

E. Transparent pricing

Infrastructure fees may need to be objectively determined and non-discriminatory.

F. Accounting separation

The MCX-SX/NSE proceedings demonstrate how accounting separation can be relevant where a dominant operator participates in multiple related markets.

11. Leveraging Monopoly Power

One of the most significant risks is leveraging.

Suppose an undertaking has monopoly power in:

Market A — financial clearing infrastructure

and also competes in:

Market B — financial trading services.

It could potentially use control over Market A to disadvantage competitors in Market B by:

• discriminatory access;
• preferential pricing;
• tying;
• technical degradation;
• delayed connectivity;
• preferential data;
• cross-subsidisation; or
• exclusive contracts.

This is particularly important where the infrastructure provider is simultaneously:

infrastructure operator + market participant.

The MCX-SX/NSE case provides an Indian example of the concern that dominance in one segment can be leveraged into another.

12. Financial Data as Infrastructure

Modern financial infrastructure extends beyond physical or settlement systems.

Data itself may become infrastructure when a dominant provider controls:

• transaction histories;
• market data;
• securities reference data;
• credit information;
• payment data;
• financial APIs;
• risk models; or
• real-time trading information.

Competition issues can arise if the incumbent:

• refuses reasonable access;
• supplies inferior data to competitors;
• gives preferential access to its own affiliate;
• imposes excessive data charges;
• prevents portability; or
• combines infrastructure data with downstream services.

This creates a transition from traditional financial infrastructure monopoly to data-enabled financial ecosystem dominance.

13. Two-Sided and Multi-Sided Market Analysis

Payment infrastructure frequently involves several groups:

Consumers ↔ Payment Network ↔ Banks ↔ Merchants

Similarly:

Investors ↔ Exchange ↔ Brokers ↔ Clearing House ↔ Settlement System

A competition authority therefore needs to understand interactions across the entire ecosystem.

Ohio v. American Express is particularly important because the Supreme Court treated the credit-card transaction as a two-sided platform and required the competitive analysis to take both cardholders and merchants into account.

This is highly relevant to:

• digital wallets;
• payment apps;
• buy-now-pay-later systems;
• fintech marketplaces;
• crypto exchanges;
• securities exchanges; and
• financial-data platforms.

14. Monopoly Versus Legitimate Infrastructure Concentration

Not every financial infrastructure monopoly is unlawful.

Concentration may produce legitimate benefits:

• lower transaction costs;
• increased security;
• greater liquidity;
• standardisation;
• reduced settlement risk;
• economies of scale;
• improved fraud detection; and
• interoperability.

The competition-law question is therefore not:

"Is there only one infrastructure provider?"

but rather:

"Is the provider using its market power in a manner that harms the competitive process?"

This distinction is particularly important because some financial infrastructures are naturally concentrated for prudential and systemic-risk reasons.

15. Regulatory Competition and Financial Stability

Financial infrastructure creates an unusual tension between:

Competition objectives

• entry;
• innovation;
• lower prices;
• interoperability;
• consumer choice.

and:

Financial-stability objectives

• systemic resilience;
• settlement finality;
• cybersecurity;
• liquidity;
• capital adequacy;
• operational reliability.

Breaking up an infrastructure monopoly may theoretically increase competition but could also create fragmented systems and increased settlement risk.

Therefore, competition authorities and financial regulators often need to coordinate.

16. Key Issues for Digital Financial Infrastructure

Modern competition investigations may additionally examine:

1. API foreclosure

Blocking competitors from connecting to infrastructure.

2. Data portability

Preventing customers from transferring transaction histories.

3. Self-preferencing

Giving an affiliated financial product preferential infrastructure access.

4. Algorithmic discrimination

Using algorithms to provide preferential treatment to affiliated participants.

5. Interoperability restrictions

Preventing competing payment systems from communicating.

6. Switching costs

Making migration to rival infrastructure technically or financially expensive.

7. Network-effect foreclosure

Using an established user base to make entry commercially impracticable.

8. Tying

Conditioning access to essential infrastructure on purchasing another financial service.

17. Competition-Law Framework

A useful analytical framework is:

Step 1 — Define the relevant market

↓

Step 2 — Determine market power/dominance

↓

Step 3 — Identify infrastructure bottleneck

↓

Step 4 — Examine access conditions

↓

Step 5 — Examine discriminatory treatment

↓

Step 6 — Examine pricing

↓

Step 7 — Examine interoperability

↓

Step 8 — Examine leveraging/tying

↓

Step 9 — Identify objective justifications

↓

Step 10 — Assess actual or likely foreclosure

↓

Step 11 — Consider proportionate remedies

18. Key Legal Principles

The principal lessons from the case law are:

1. Dominance itself is generally not prohibited.
2. Control over indispensable financial infrastructure can create special competition concerns.
3. Refusal to provide access can constitute abuse in appropriate circumstances.
4. Discriminatory access can disadvantage competing financial institutions.
5. Payment networks must be analysed with their multi-sided characteristics in mind.
6. Financial infrastructure pricing can have downstream competitive effects.
7. A dominant exchange may not necessarily use strength in one market to eliminate competitors in another.
8. Network effects can create significant entry barriers.
9. Interoperability can be an important competitive parameter.
10. Competition remedies must take financial stability and legitimate regulatory objectives into account.

19. Conclusion

Financial infrastructure monopolies occupy a special position in competition law because they can simultaneously be both commercial businesses and essential components of the financial system.

The most important competition risks arise where a dominant infrastructure provider uses its control over:

access + interoperability + data + liquidity + network effects

to exclude competing providers.

The Clearstream case demonstrates the importance of non-discriminatory access to securities-clearing infrastructure; MCX-SX v. NSE demonstrates the competition implications of dominance and pricing in exchange infrastructure; while Visa/Mastercard, Budapest Bank, Sainsbury's and Ohio v. American Express demonstrate the distinctive competition problems associated with payment networks and two-sided financial platforms.

Accordingly, the modern competition-law approach is not simply to ask whether a financial infrastructure provider is a monopoly. It asks whether the structure of the infrastructure creates durable market power and whether that power is being used to foreclose rivals, discriminate in access, exploit dependent participants, or extend dominance into adjacent financial markets.