Global Liquidity Routing And Payment Network Control

Introduction

Global liquidity routing and payment network control refers to the ability of banks, payment networks, fintech platforms, clearing systems, card schemes, digital-wallet operators, correspondent banks, and other financial-infrastructure providers to determine how money moves across markets. The concept includes decisions about which payment rail is used, which intermediary processes a transaction, how funds are cleared and settled, where liquidity is held, what access conditions apply, and which participants can connect to the network.

From a competition-law perspective, these systems can create significant market power because payment infrastructure often exhibits network effects, economies of scale, interoperability dependencies, switching costs, data advantages, and liquidity concentration.

A firm controlling an important payment or liquidity-routing layer may therefore possess power not merely over prices, but over the architecture through which competitors reach customers and transact.

1. Meaning of Global Liquidity Routing

Liquidity routing is the process of directing available financial resources through different payment, settlement, clearing, banking or trading channels.

For example, an international transaction may involve:

Customer → Payment Institution → Local Bank → Correspondent Bank → Clearing Network → Settlement System → Receiving Bank → Merchant

A routing algorithm can decide:

• which correspondent bank is used;
• which currency is used;
• which clearing house processes the transaction;
• whether a transaction goes through a card network or alternative payment rail;
• how foreign-exchange liquidity is sourced;
• which settlement account is debited;
• which payment route receives priority;
• how transaction costs and settlement risks are minimized.

The more transactions a network handles, the more valuable its routing infrastructure can become.

2. Payment Network Control

Payment-network control exists where an infrastructure operator can materially influence:

1. Access — who can participate;
2. Routing — how transactions are directed;
3. Interoperability — whether competing systems can connect;
4. Pricing — interchange, access, processing or settlement fees;
5. Data — access to transaction information;
6. Technical standards — protocols and APIs;
7. Liquidity — where participants must maintain funds;
8. Settlement — when and through which system transactions become final.

This creates a distinction between ordinary commercial market power and infrastructural market power.

A dominant payment network can potentially disadvantage competitors without explicitly refusing to deal with them. It may instead manipulate technical standards, access conditions, routing preferences, data access, fees or interoperability.

3. Why Payment Networks Are Particularly Susceptible to Market Power

A. Network Effects

Payment networks become more valuable as more users, merchants and financial institutions participate.

A simplified relationship is:

More users → More merchants → More transactions → Greater liquidity → More users

This can create a self-reinforcing competitive advantage.

B. Two-Sided or Multi-Sided Markets

Payment networks typically connect several groups:

• consumers;
• merchants;
• issuing banks;
• acquiring banks;
• payment processors;
• fintechs;
• financial institutions.

The competitive impact of conduct therefore cannot always be assessed by looking at one side alone.

C. Switching Costs

Switching payment infrastructure can require:

• new technical integration;
• compliance changes;
• contractual renegotiation;
• customer migration;
• liquidity reallocation;
• certification;
• security testing.

Consequently, a theoretically available alternative may not be an effective competitive constraint.

D. Liquidity Effects

Liquidity itself can become a competitive moat.

A payment network with large transaction volumes can offer:

• faster settlement;
• deeper liquidity;
• lower transaction costs;
• better foreign-exchange matching;
• lower counterparty risk.

Competitors may consequently find it difficult to achieve sufficient scale.

4. Competition-Law Issues

A. Abuse of Dominance

A payment network with substantial market power may engage in:

• discriminatory access;
• exclusionary routing;
• excessive access charges;
• tying;
• refusal to interoperate;
• discriminatory technical standards;
• self-preferencing;
• degradation of competing payment rails.

The relevant legal question is whether the conduct protects legitimate infrastructure functions or excludes equally efficient competitors.

B. Refusal to Provide Access

Suppose a dominant payment infrastructure provider controls an essential gateway and refuses access to a competing payment service.

Competition law may examine:

1. whether the infrastructure is indispensable;
2. whether duplication is economically or technically feasible;
3. whether access is objectively necessary;
4. whether refusal eliminates effective competition;
5. whether there is an objective justification.

This resembles the broader essential-facilities doctrine.

C. Interoperability Restrictions

Payment competition frequently depends on interoperability.

A dominant network might prevent competitors from:

• connecting through APIs;
• accessing settlement infrastructure;
• routing transactions;
• obtaining transaction information;
• using tokenisation infrastructure;
• connecting to wallets or merchant terminals.

Interoperability restrictions can therefore become exclusionary even when the dominant firm does not expressly prohibit competition.

5. Routing Discrimination

Routing algorithms introduce a newer competition problem.

Imagine a payment platform operating several payment rails:

Rail A = its own network
Rail B = independent competitor

The platform could technically route transactions through either system but designs its algorithm to prefer Rail A.

This can create:

Algorithmic preference → Higher transaction volume → Greater liquidity → Lower costs → More users → Stronger network effects

The conduct may become particularly problematic if users cannot understand or change the routing preference.

6. Self-Preferencing

A vertically integrated payment company may simultaneously operate:

• a payment network;
• a digital wallet;
• merchant-acquiring services;
• lending;
• foreign-exchange services;
• settlement infrastructure.

It could then prioritize its own downstream services.

For example:

Payment Network → Own Wallet → Own Lending Product

while competing products receive inferior routing or technical access.

The competition concern is that infrastructure control can be leveraged into adjacent markets.

7. Data as a Source of Payment-Network Power

Payment systems generate extremely valuable data concerning:

• transaction frequency;
• merchant relationships;
• customer behaviour;
• geographic activity;
• credit patterns;
• liquidity requirements;
• payment failures;
• foreign-exchange activity.

A dominant network can potentially use this information to improve competing products while denying equivalent access to rivals.

This creates a possible data foreclosure problem.

8. Liquidity Hoarding and Network Effects

A large financial platform can concentrate liquidity within its own ecosystem.

For example:

Large network → More liquidity → Faster settlement → Better pricing → More users → More liquidity

Competitors may therefore face a liquidity disadvantage even if their underlying technology is superior.

Competition authorities may need to distinguish legitimate liquidity efficiencies from strategies designed to foreclose rival payment networks.

9. Cross-Border Competition Problems

Global payment networks create jurisdictional complications.

A transaction can simultaneously involve:

• the customer's country;
• merchant's country;
• issuing bank;
• acquiring bank;
• correspondent bank;
• clearing jurisdiction;
• settlement jurisdiction;
• currency jurisdiction.

Consequently, exclusionary conduct in one jurisdiction can affect competition elsewhere.

This raises issues involving:

• extraterritorial competition law;
• regulatory cooperation;
• conflicts between financial regulators;
• data-localisation rules;
• sanctions;
• capital controls;
• payment-system access rules.

10. Key Case Laws

1. United States v. Visa U.S.A., Inc. (2001)

This is one of the most important cases concerning payment-network competition.

The U.S. Department of Justice challenged rules adopted by Visa and Mastercard that restricted member banks from issuing cards associated with competing networks such as American Express and Discover.

Principle

The case demonstrated how network rules can have exclusionary effects even when they concern relationships between network members rather than ordinary consumer pricing.

Relevance

It is highly relevant to global payment-network control because dominant networks may use contractual or technical rules to prevent rival networks from obtaining access to banks and customers.

The case illustrates:

Network dominance + exclusionary membership rules = potential foreclosure of competitors.

2. Ohio v. American Express Co. (2018)

The U.S. Supreme Court considered competition involving American Express's merchant-acquirer rules.

American Express prohibited merchants from steering customers toward cheaper payment methods.

Principle

The Court emphasized the importance of analysing the two-sided nature of payment-card markets.

The relevant market could not simply be examined from the merchant side because the platform simultaneously served merchants and cardholders.

Relevance

The decision is particularly important for modern payment platforms because competition authorities must consider effects across interconnected sides of a platform.

It provides an important framework for analysing:

• payment networks;
• merchant fees;
• consumer rewards;
• steering restrictions;
• two-sided network effects.

3. European Commission v. MasterCard Inc. (2014)

The EU institutions examined Mastercard's multilateral interchange fees.

The concern was that interchange arrangements could raise costs for merchants and affect competition between acquiring banks.

Principle

Payment-system rules can constitute restrictions of competition when they materially influence competitive conditions among market participants.

Relevance

The case illustrates that payment-network rules themselves can be competition-law objects of scrutiny.

It is especially relevant to:

• interchange fees;
• acquiring markets;
• card-network governance;
• merchant costs;
• cross-border payment systems.

4. Commission v. United Brands Company (1978)

Although not a payment-network case, United Brands remains foundational for understanding dominance and abusive conduct.

The European Court of Justice explained that dominance concerns a position of economic strength enabling a firm to behave to an appreciable extent independently of competitors, customers and consumers.

Relevance

The principle can be applied to financial infrastructure where a payment network becomes sufficiently indispensable that participants cannot effectively discipline its behaviour through ordinary market forces.

Payment infrastructure may therefore exhibit dominance through:

• network effects;
• barriers to entry;
• infrastructure dependency;
• customer lock-in.

5. IMS Health GmbH & Co. OHG v. NDC Health GmbH (2004)

The European Court of Justice considered when refusal to license intellectual-property-protected infrastructure could constitute an abuse of dominance.

The Court developed strict conditions surrounding compulsory access.

Relevance

The reasoning is relevant to payment infrastructure where access to a technical system, database, interface or network is claimed to be indispensable.

It helps establish that:

Not every refusal of access is abusive.

But where infrastructure is indispensable and refusal eliminates effective competition without objective justification, competition law may intervene.

6. Bronner v. Mediaprint (1998)

Bronner is another important European case concerning access to infrastructure.

The Court imposed demanding conditions before a refusal to provide access to infrastructure would constitute an abuse.

Relevance to payment networks

The case is particularly relevant to:

• clearing infrastructure;
• settlement systems;
• payment gateways;
• banking infrastructure;
• correspondent networks.

It prevents competition law from automatically transforming every privately operated infrastructure into a compulsory-access facility.

7. Slovak Telekom v. Commission (2021)

The European Court of Justice examined exclusionary conduct involving access to telecommunications infrastructure.

Although telecommunications rather than payments were directly involved, the case is important because it demonstrates how infrastructure control can be used to disadvantage downstream competitors.

Relevance

The same economic logic can apply where a payment operator controls a critical upstream layer and supplies downstream payment services itself.

The central concern becomes:

Infrastructure control + downstream competition + restrictive access conditions.

8. Mastercard Inc. v. Merricks (2020)

The UK Supreme Court addressed collective proceedings concerning Mastercard's interchange fees.

The case involved allegations that Mastercard's multilateral interchange fee arrangements caused merchants to pay excessive charges.

Relevance

The decision illustrates the potentially enormous economic significance of payment-network arrangements and demonstrates how competition-law claims involving payment systems can generate large-scale collective litigation.

11. Comparative Case-Law Lessons

12. Emerging Algorithmic Dimension

Modern payment infrastructure increasingly relies upon automated systems.

A routing algorithm may optimise:

Cost + speed + liquidity + fraud risk + currency availability + settlement risk

But an algorithm can also systematically favour a particular network.

For example:

Network A controls the routing algorithm and owns the most profitable payment rail.

If the algorithm consistently sends transactions toward Network A, competitors may experience declining volumes.

This creates a feedback loop:

Algorithmic preference → Volume concentration → Liquidity concentration → Lower costs → Increased attractiveness → Further volume concentration

The resulting market power can become difficult to challenge because the algorithm's effects may be technically complex and invisible to customers.

13. Artificial Intelligence and Payment Routing

AI can intensify these concerns.

An AI-based routing system may independently determine:

• which payment rail should be selected;
• how liquidity should be allocated;
• when settlement should occur;
• which intermediary receives transactions;
• which FX provider is selected;
• how fraud risk is assessed.

Competition authorities may therefore need to examine not only intent, but also systemic effects.

A firm might claim:

"The algorithm simply optimises efficiency."

The legal inquiry would nevertheless ask whether the algorithm systematically produces exclusionary outcomes.

14. Global Systemically Important Payment Infrastructure

The most serious competition concerns arise where a small number of infrastructures become globally significant.

Examples of relevant infrastructure layers include:

• card networks;
• correspondent banking;
• cross-border payment messaging;
• clearing houses;
• settlement systems;
• digital wallets;
• payment gateways;
• central-bank payment infrastructure;
• large fintech payment platforms.

Control over these systems can generate a form of infrastructural power distinct from traditional market power.

15. Competition Between Payment Rails

Modern economies increasingly contain competing rails:

Cards
↕
Bank transfers
↕
Instant payments
↕
Digital wallets
↕
Account-to-account payments
↕
Stablecoin/blockchain settlement
↕
Central-bank digital infrastructure

Competition depends heavily upon interoperability.

If one infrastructure prevents users from easily moving between these systems, the network may gain substantial switching and dependency power.

16. Regulatory and Competition-Law Tension

Payment infrastructure is often simultaneously regulated under:

• banking law;
• payment-services regulation;
• financial-market regulation;
• competition law;
• data-protection law;
• cybersecurity regulation;
• AML rules;
• sanctions legislation.

A competition authority must therefore distinguish legitimate regulatory requirements from strategically designed restrictions.

For example, an operator may justify denying access on cybersecurity grounds.

That justification should be tested against:

1. whether the security concern is genuine;
2. whether the restriction is proportionate;
3. whether less restrictive alternatives exist;
4. whether equivalent firms are treated equally.

17. Possible Competition Remedies

Authorities may consider several remedies.

Structural remedies

• separation of infrastructure and downstream services;
• divestiture;
• ownership restrictions.

Behavioural remedies

• non-discriminatory access;
• interoperability obligations;
• routing neutrality;
• prohibition of self-preferencing;
• transparent technical standards.

Data remedies

• data portability;
• API access;
• data-sharing requirements subject to privacy and security safeguards.

Pricing remedies

• limits on interchange fees;
• reasonable access pricing;
• transparent settlement charges.

Governance remedies

• independent network governance;
• transparent algorithmic auditing;
• monitoring of routing systems.

18. Central Competition-Law Question

The central question is not simply:

"Who controls the payment network?"

It is:

"Does control over payment and liquidity infrastructure allow an undertaking to restrict competition in adjacent or downstream markets, and does the resulting conduct harm the competitive process?"

This distinction is crucial because infrastructure concentration can produce legitimate efficiencies.

A large payment network may reduce:

• transaction costs;
• fraud;
• settlement risk;
• liquidity fragmentation;
• foreign-exchange costs.

Competition law should therefore avoid treating scale itself as unlawful.

The concern arises when infrastructure advantages are converted into exclusionary barriers.

19. Key Legal Principles

The principal principles emerging from the case law are:

1. Network rules can themselves restrict competition.
2. Two-sided payment markets require analysis of multiple market sides.
3. Interchange and access fees can materially affect competition.
4. Dominant infrastructure operators may have special responsibilities.
5. Refusal to provide access requires careful essential-facilities analysis.
6. Infrastructure control can be leveraged into downstream markets.
7. Network effects can strengthen barriers to entry.
8. Algorithmic routing can create new forms of exclusion.
9. Liquidity concentration can reinforce market power.
10. Global payment systems require coordination between competition and financial regulators.

Conclusion

Global liquidity routing and payment network control represents a major frontier of modern competition law. Traditional antitrust analysis focused heavily on prices, output and market shares. Payment infrastructure demonstrates why competition can also depend upon control over the channels through which economic transactions occur.

The combination of network effects, liquidity concentration, interoperability, data accumulation, algorithmic routing and switching costs can give payment-network operators considerable structural power.

The most important cases—including United States v. Visa U.S.A., Ohio v. American Express, Commission v. MasterCard, IMS Health, Bronner, Slovak Telekom, United Brands, and Mastercard v. Merricks—collectively demonstrate that competition law can scrutinize both the economic terms and infrastructural architecture through which powerful networks interact with competitors and customers.

The emerging challenge is therefore to ensure that efficient global payment infrastructure remains open enough for meaningful competition, while preserving security, financial stability, privacy and legitimate liquidity efficiencies.