Introduction
Margin squeeze cases under Turkish Competition Law are among the most technical forms of abuse of dominance. A margin squeeze may occur where a vertically integrated dominant undertaking controls an important upstream input and also competes in the downstream market. If the difference between the upstream price charged to competitors and the downstream price charged to final customers is too narrow for an equally efficient competitor to operate profitably, the conduct may restrict competition.
The main legal basis is Article 6 of Law No. 4054 on the Protection of Competition, which prohibits the abuse of a dominant position in a market for goods or services within all or part of Turkey. Article 6 expressly covers conduct that prevents competitors from entering a market, complicates competitors’ activities, discriminates between equivalent purchasers, ties products or leverages dominance into another market. These concepts are broad enough to cover margin squeeze as an exclusionary pricing abuse.
Margin squeeze is especially relevant in sectors with vertical integration and essential upstream inputs. Telecommunications, energy, transport infrastructure, digital advertising, payment systems, online platforms, software ecosystems, logistics networks, data-dependent services and wholesale-retail supply models may all create margin squeeze risks.
1. What Is Margin Squeeze?
A margin squeeze occurs when the upstream and downstream prices of a vertically integrated dominant undertaking leave an insufficient margin for downstream competitors. The dominant undertaking may control a wholesale input and also sell a retail product that depends on that input. If competitors must buy the input from the dominant undertaking, but the dominant undertaking’s retail price is so low or its wholesale price is so high that competitors cannot profitably compete, the margin is “squeezed.”
The Turkish Competition Authority’s Guidelines on the Assessment of Exclusionary Conduct by Dominant Undertakings define price or margin squeeze as a situation in vertically related markets where an undertaking dominant in the upstream market sets the margin between its upstream product price and downstream product price in a way that does not allow even an equally efficient competitor in the downstream market to carry on business profitably and sustainably. The Guidelines state that the dominant undertaking may cause margin squeeze by increasing the upstream price, decreasing the downstream price, or doing both at the same time.
This definition is critical because margin squeeze is not simply “low prices” or “high wholesale prices.” It is the relationship between the two prices that matters.
2. Why Margin Squeeze Is an Abuse of Dominance Issue
Margin squeeze is assessed under abuse of dominance rules because the conduct requires market power at the upstream level. A non-dominant undertaking normally cannot squeeze rivals because competitors can switch to alternative inputs. The concern arises where the upstream product is indispensable or commercially necessary for downstream competition.
The dominant undertaking may use its upstream market power to distort the downstream market. By narrowing the margin, it can make downstream competitors unprofitable, weaken their market position, prevent entry, limit expansion or push them out of the market. The Turkish Guidelines explain that such conduct allows the dominant undertaking to transfer its upstream market power to the downstream market and thereby restrict competition.
This is why margin squeeze is different from ordinary competitive pricing. A vertically integrated firm may lawfully compete downstream. It may also lawfully sell upstream inputs. The competition law problem arises when the structure of upstream and downstream prices prevents equally efficient rivals from competing.
3. Legal Framework: Article 6 of Law No. 4054
Article 6 of Law No. 4054 prohibits abuse by one or more undertakings of their dominant position. The provision lists examples such as preventing competitors from entering a commercial activity, complicating competitors’ activities, discrimination, tying and leveraging advantages from one market into another. Margin squeeze usually fits within the categories of exclusionary abuse and leveraging dominance into a related market.
Dominance itself is not illegal. A company may become dominant through efficiency, innovation, investment, brand strength or technological development. Turkish law intervenes when dominance is abused in a way that harms competition and consumer welfare.
The Turkish Guidelines emphasize that dominant undertakings have a “special responsibility” not to restrict competition through conduct that uses market power to reduce consumer welfare. They also state that the line between abusive conduct and competitive behavior may require detailed economic analysis.
4. Elements of a Margin Squeeze Case
A margin squeeze case generally requires several elements.
First, the undertaking must be vertically integrated. It must operate in both an upstream market and a related downstream market.
Second, it must be dominant in the upstream market. Dominance in the downstream market is not strictly required, but it may strengthen the anti-competitive effect of the conduct.
Third, the upstream product must be important, and under the Turkish Guidelines it should be indispensable for operating in the downstream market.
Fourth, the margin between the upstream price and downstream price must be too narrow for an equally efficient competitor to remain profitable and sustainable downstream.
Fifth, the conduct must be likely to cause anti-competitive foreclosure.
The Turkish Guidelines list these factors expressly: the structure of the undertaking, the nature of the product, the undertaking’s position in the relevant market or markets, and the margin between upstream and downstream prices.
5. Vertical Integration
Vertical integration is the starting point. A company is vertically integrated when it operates at different levels of the supply chain. For example, a telecom operator may control wholesale network infrastructure and also sell broadband services to retail customers. An energy company may control transmission or distribution infrastructure and also compete in downstream supply. A platform may control access infrastructure and also sell its own downstream services.
Vertical integration is not unlawful. It may generate efficiencies, reduce transaction costs, improve product quality, increase investment incentives and create better coordination between supply levels. However, when a vertically integrated undertaking is dominant upstream, it may have the ability and incentive to exclude downstream competitors.
A margin squeeze allegation requires examining whether the upstream and downstream operations form a single economic unit and whether the upstream product is used by competitors to operate in the downstream market.
6. Upstream Dominance
Margin squeeze requires dominance in the upstream market. The upstream market may involve physical infrastructure, network access, wholesale supply, essential data, software interfaces, platform services, technical access, payment infrastructure or another input needed downstream.
Dominance is defined in Law No. 4054 as the power of one or more undertakings in a particular market to determine economic parameters such as price, supply, production and distribution by acting independently of competitors and customers.
In margin squeeze cases, upstream dominance may arise because the input is regulated, unique, costly to duplicate, protected by intellectual property, controlled by network effects, or technically necessary. The stronger the upstream dependency, the more serious the risk.
7. Downstream Dominance Is Not Always Required
The Turkish Guidelines state that dominance in the downstream market is not required for margin squeeze, although downstream dominance may increase the restrictive effects of the conduct. This is an important distinction.
A vertically integrated undertaking may not yet be dominant downstream, but it may use its upstream dominance to weaken downstream competitors and become stronger over time. Therefore, the analysis focuses primarily on upstream dominance and downstream foreclosure.
For example, a telecom operator may dominate wholesale access while facing some retail competition. If it sets wholesale and retail prices in a way that prevents retail competitors from profitably operating, the conduct may still raise margin squeeze concerns.
8. The Upstream Product Must Be Important
The Turkish Guidelines state that the upstream product should be indispensable for operating in the downstream market. This is a strict condition and prevents margin squeeze doctrine from becoming too broad.
Indispensability means more than commercial convenience. The input must be necessary for effective downstream competition. If competitors can reasonably use alternative suppliers, technologies, platforms or routes to market, the margin squeeze claim becomes weaker.
However, indispensability can be complex in digital markets. An upstream input may be data, API access, ranking visibility, app store access, payment infrastructure, ad inventory or marketplace access. Even where alternatives exist formally, the practical question is whether a downstream competitor can compete effectively without the input.
9. The Equally Efficient Competitor Test
The equally efficient competitor test is central to Turkish margin squeeze analysis. The question is whether a competitor as efficient as the dominant undertaking could operate profitably in the downstream market given the margin between the upstream input price and the dominant undertaking’s downstream retail price.
The Guidelines explain that when examining pricing abuses, the Board considers whether a hypothetical competitor as efficient as the dominant undertaking would likely be excluded as a result of the conduct. The Board primarily uses the dominant undertaking’s own costs, and where reliable cost data is unavailable, it may use competitors’ cost data or other comparable reliable data.
This test protects competition rather than inefficient competitors. If even an equally efficient competitor cannot survive, the margin may be abusive. If an equally efficient competitor can compete profitably, intervention is generally less likely.
10. Cost Benchmark: Long-Run Average Incremental Cost
For margin squeeze, the Turkish Guidelines state that the Board will generally use the dominant undertaking’s long-run average incremental cost for the downstream product when determining whether the margin allows an equally efficient competitor to operate. The calculation assumes that the dominant undertaking uses the upstream input at the same price at which it sells that input to downstream competitors.
This is logical because the analysis asks whether the dominant undertaking could profitably operate downstream if it had to pay the same upstream price as its rivals. If the answer is no, then rivals may be squeezed.
Cost allocation is often one of the most disputed parts of margin squeeze cases. The parties may disagree on which costs belong to the downstream product, whether common costs should be included, how long-run costs are measured, and whether promotional or customer acquisition costs should be counted.
11. Margin Squeeze vs. Predatory Pricing
Margin squeeze should not be confused with predatory pricing. Predatory pricing focuses on whether the dominant undertaking’s downstream price is below cost. Margin squeeze focuses on the spread between upstream and downstream prices.
A downstream price may be above cost but still create margin squeeze if the upstream access price is too high. Conversely, a downstream price may be low but not create margin squeeze if competitors do not depend on the dominant undertaking’s upstream input.
The practical difference is important. In predatory pricing, the key question is sacrifice through below-cost pricing. In margin squeeze, the key question is whether the margin between input and retail prices allows an equally efficient competitor to survive.
12. Margin Squeeze vs. Refusal to Supply
Margin squeeze is also different from refusal to supply. In a refusal-to-supply case, the dominant undertaking denies access to the input. In a margin squeeze case, the input is supplied, but on terms that make downstream competition economically unviable.
This distinction matters because refusal-to-supply cases often require strict indispensability analysis. Margin squeeze may be treated as a distinct theory of harm because the dominant undertaking has already chosen to supply the input but allegedly does so under unfair economic conditions.
Recent academic discussion published in the Turkish Competition Authority’s journal notes that EU case law has treated margin squeeze as a distinct theory of harm and, in cases such as TeliaSonera and Slovak Telekom, did not require the strict Bronner refusal-to-deal test where access was provided but unfair commercial conditions allegedly distorted competition.
13. Margin Squeeze in Telecommunications
Telecommunications is the classic sector for margin squeeze cases. Network operators may control wholesale infrastructure while also competing in retail broadband, fixed line, mobile, leased line or data services. Retail competitors may need wholesale access to the dominant operator’s network.
The Turkish Guidelines refer to the Competition Board’s TTNET margin squeeze decision as an example in the margin squeeze section. In telecom markets, a margin squeeze may occur if the wholesale network access price and the dominant operator’s retail price leave insufficient room for retail competitors to cover downstream costs.
Telecom cases are often complicated by regulation. Wholesale access prices may be regulated by sectoral authorities. However, regulatory approval of certain prices does not automatically eliminate competition law risk. A company may still need to assess whether its pricing structure creates exclusionary effects under Article 6.
14. Margin Squeeze in Energy and Infrastructure Markets
Energy markets may also create margin squeeze risk. A vertically integrated energy company may control upstream generation, transmission, distribution, balancing services or essential infrastructure while also competing in downstream retail supply. If downstream rivals depend on access to the infrastructure or energy input, pricing structure may matter.
The same logic may apply to ports, rail systems, airport services, pipelines, payment infrastructure, logistics hubs or other network industries. Where duplication is costly and access is necessary, upstream pricing and downstream pricing must be reviewed carefully.
Infrastructure-heavy markets often involve high fixed costs and regulated access terms. Competition analysis therefore requires sector-specific economic expertise.
15. Margin Squeeze in Digital Markets
Digital markets may generate new forms of margin squeeze. A platform may control upstream access to users, data, advertising inventory, app distribution, payment systems, API infrastructure or cloud-based tools, while also competing downstream.
For example, a marketplace may charge sellers commissions and also sell its own products downstream. A digital advertising platform may control upstream ad infrastructure and compete in downstream ad services. A payment platform may control access tools and compete with merchants or financial service providers. A software ecosystem may charge developers for access while promoting its own competing applications.
The Turkish Competition Authority’s digital transformation report shows that digital markets and platform conduct have become central enforcement areas, including decisions on Google Shopping, Google Local Search, Çiçeksepeti, Nadirkitap, Facebook-WhatsApp and Dolap/Trendyol. Although these are not all margin squeeze cases, they demonstrate that platform power, data, access and self-preferencing are highly relevant in modern Turkish competition law.
16. Margin Squeeze and Self-Preferencing
Margin squeeze may overlap with self-preferencing. Self-preferencing occurs when a platform or vertically integrated undertaking gives preferential treatment to its own downstream services. Margin squeeze may appear where the platform uses economic terms rather than ranking or technical design to disadvantage rivals.
For example, a platform may charge high access fees to third-party sellers while pricing its own retail products aggressively. A digital advertising intermediary may impose fees on third-party participants while giving its own downstream arm better effective economics. A software ecosystem may charge app developers high commissions while offering its own competing apps under more favorable internal economics.
Academic discussion in Rekabet Dergisi notes that margin squeeze may overlap with self-preferencing from an equity perspective because competing parties may not compete on a level playing field where the dominant undertaking controls key terms.
17. Objective Justifications
A margin squeeze allegation does not automatically mean infringement. The dominant undertaking may present objective justifications. The Turkish Guidelines state that the Board considers justifications in margin squeeze cases, including market conditions causing the strategy, narrowing margins due to changes in upstream supply or downstream demand, and the launch of a new product at low price.
Possible justifications may include:
Cost changes in upstream supply.
Temporary promotional pricing for a new downstream product.
Demand shocks.
Regulatory constraints.
Efficiency gains.
Short-term campaigns.
Technological transition.
Need to recover investment costs.
Competitive response to market developments.
However, the justification must be credible, documented and proportionate. A vague claim that the market required the pricing strategy may not be enough.
18. Evidence in Margin Squeeze Cases
Margin squeeze cases are evidence-heavy. The Turkish Competition Authority may examine wholesale prices, retail prices, cost accounting records, internal profitability reports, customer contracts, access agreements, regulatory filings, business plans, emails, board presentations, pricing models and competitor complaints.
The most important evidence usually concerns:
The relevant upstream and downstream markets.
The dominant undertaking’s upstream market position.
Whether competitors depend on the upstream input.
The wholesale price charged to competitors.
The downstream retail price charged by the integrated undertaking.
The dominant undertaking’s downstream costs.
Whether an equally efficient competitor could operate profitably.
Internal documents showing exclusionary strategy or legitimate business reasons.
Economic expert analysis is often essential. The case may turn on cost allocation, product profitability, time period, customer group, bundling, discounts, regulatory effects and market dynamics.
19. Defenses for Dominant Undertakings
A dominant undertaking facing a margin squeeze allegation may defend itself in several ways.
It may challenge market definition and argue that it is not dominant upstream. It may show that the upstream input is not indispensable because competitors can use alternatives. It may demonstrate that the margin is sufficient under the equally efficient competitor test. It may argue that cost allocation used by the complainant is incorrect. It may show that wholesale and retail prices are regulated or objectively constrained. It may present efficiency justifications, demand changes or temporary promotional reasons.
The strongest defense is usually a well-documented economic analysis prepared before the pricing strategy is implemented. Companies that wait until an investigation begins may struggle to reconstruct reliable cost data.
20. Risks for Complainants
A complainant alleging margin squeeze should also prepare carefully. It is not enough to say that retail prices are low or wholesale prices are high. A strong complaint must show upstream dominance, dependence on the input, insufficient margin, foreclosure effect and lack of objective justification.
A complainant should provide evidence of its downstream costs, inability to compete profitably despite efficiency, customer losses, market share changes, lack of alternative inputs and economic analysis comparing upstream and downstream prices.
The complaint should focus on harm to competition, not merely harm to one competitor. Competition law protects the competitive process, not inefficient firms.
21. Administrative Fines and Remedies
If the Competition Board finds that margin squeeze violates Article 6, the undertaking may face administrative fines. Law No. 4054 empowers the Board to impose sanctions for violations and to order measures necessary to terminate the infringement and restore competition. Article 9 also allows the Board to notify undertakings of conduct to be fulfilled or avoided and to adopt interim measures where serious and irreparable harm is likely before the final decision.
Remedies may include changing wholesale prices, changing retail prices, ensuring non-discriminatory access, revising access terms, improving transparency, separating internal accounting, implementing compliance monitoring or providing access under fair and reasonable terms.
In digital markets, remedies may also involve changes to commissions, platform fees, ranking mechanisms, data access, API access or seller terms.
22. Private Damages Claims
Margin squeeze may also lead to private damages claims. Downstream competitors may argue that they lost customers, profits or market opportunities because they were squeezed by the dominant undertaking’s pricing structure. Customers may claim harm if downstream competition was weakened and prices later increased or quality decreased.
Law No. 4054 contains private law consequences for competition law violations, including compensation rights for injured parties. The damages analysis may be complex because claimants must prove infringement, loss and causation.
A Competition Board infringement decision may significantly strengthen follow-on litigation.
23. Compliance Program for Vertically Integrated Undertakings
Vertically integrated undertakings in Turkey should adopt a margin squeeze compliance program. This is especially important where the company is dominant or potentially dominant upstream.
A practical compliance program should include:
Regular dominance assessment.
Mapping of upstream and downstream markets.
Identification of indispensable inputs.
Review of wholesale and retail price relationship.
Equally efficient competitor analysis.
Cost accounting and allocation controls.
Legal review before major price changes.
Monitoring of regulated price obligations.
Firewalls between upstream and downstream teams where necessary.
Documentation of objective justifications.
Training for pricing, finance, regulatory and commercial teams.
Internal audit of discount, bundle and promotion strategies.
Pricing decisions should be reviewed before implementation, not after complaints are filed.
24. Practical Checklist Before Setting Prices
A dominant vertically integrated undertaking should ask:
Do we control an upstream input used by downstream competitors?
Are we dominant in the upstream market?
Do downstream rivals need this input to compete effectively?
Do we also sell downstream?
What wholesale price do we charge rivals?
What retail price do we charge final customers?
Would our own downstream business be profitable if it paid the same wholesale price as rivals?
Have we calculated downstream long-run average incremental cost?
Are discounts, bundles or campaigns narrowing the margin?
Are prices regulated or commercially constrained?
Do we have objective justification for the margin?
Could the pricing structure exclude equally efficient competitors?
Have legal and economic teams reviewed the strategy?
If these questions create concern, the pricing structure should be revised before implementation.
Conclusion
Margin squeeze cases under Turkish Competition Law require a detailed legal and economic analysis. A margin squeeze may occur where a vertically integrated undertaking dominant in an upstream market sets the margin between the upstream input price and downstream retail price so narrowly that even an equally efficient downstream competitor cannot operate profitably and sustainably. The Turkish Competition Authority’s Guidelines expressly define margin squeeze in these terms and state that it may arise through an increase in upstream prices, a decrease in downstream prices, or both.
The legal basis is Article 6 of Law No. 4054, which prohibits abuse of dominant position. Margin squeeze is typically treated as an exclusionary abuse because it allows a dominant undertaking to transfer upstream market power into the downstream market and restrict competition.
The main elements are vertical integration, upstream dominance, an important upstream input, an insufficient wholesale-retail margin, and likely anti-competitive foreclosure. The Turkish Guidelines identify the equally efficient competitor test and generally use the dominant undertaking’s downstream long-run average incremental cost as the cost benchmark.
Margin squeeze is especially important in telecommunications, energy, infrastructure, digital platforms, online advertising, payment systems, software ecosystems and data-dependent markets. In digital markets, margin squeeze may overlap with self-preferencing, access discrimination, platform fees, commissions and data-related foreclosure.
For dominant undertakings, proactive compliance is essential. Wholesale and retail prices must be reviewed together. Cost data must be reliable. Promotions, bundles and discounts should be tested for margin impact. Objective justifications should be documented. For complainants, a margin squeeze claim must be supported by serious economic evidence, not merely dissatisfaction with low retail prices or high wholesale prices.
In Turkey’s active competition enforcement environment, margin squeeze is a sophisticated but real risk for vertically integrated undertakings. Companies that control important upstream inputs while competing downstream should treat price architecture as a competition law issue, not only as a commercial decision.
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