A competition authority files a monopoly case in an AI market

Where things stand (as of 16 Oct 2026)

Nothing qualifying has been published since the question opened on 16 Sep 2026. None of the four authorities has a formal case that alleges dominance in a market for AI models, AI chips or AI compute.

• European Commission, Meta/WhatsApp (Article 102): statement of objections on interim measures (Feb 2026), supplementary statement (Apr 2026), interim-measures decision (9 Jun 2026). The Commission's provisional finding is that Meta is dominant in the EEA market for consumer communication apps, and that Meta harms competition in AI assistants. Dominance in an adjacent market doesn't count, so even a later statement of objections on the merits would not qualify. Sources: Goodwin 1H-2026 update (Jul 2026); EC press release ip_26_1276.
• European Commission, Google AI-content case (opened Dec 2025): the theory rests on dominance in search and YouTube, which are adjacent markets (Macfarlanes, Dec 2025).
• Nvidia: the Commission has sent questionnaires on bundling GPUs with networking since about 2024. In March 2026 Ribera said the Commission is "looking at the entire AI stack", but it has opened no formal proceedings. Nvidia's 10-Q of 26 Aug 2026 (SEC) discloses only "requests for information" from regulators in the EU, US, UK, China and Korea. France's competition authority, which is not one of the four named authorities, said on 9 Jul 2026 that its Nvidia probe is nearing its end (Reuters/PYMNTS). That makes it less likely the Commission opens a parallel case.
• United States: the Justice Department is probing Nvidia's Groq deal for possible avoidance of merger-filing rules. The New York Times (9 Sep 2026) says a fine is likely and unwinding the deal is not, so any filing would be a merger-notification penalty, not a monopolisation claim. The FTC is probing Microsoft (cloud and AI bundling; any complaint would most likely target productivity or cloud markets) and Arm (chip-architecture licensing, not an AI-chip market). The Justice Department's antitrust division is unstable: Slater was ousted in Feb 2026, the acting head left in June, and Candeub's confirmation is pending. The administration is openly pro-AI.
• UK CMA: works mainly through its strategic-market-status regime, which is excluded here. It shows no sign of an AI case under the Competition Act's dominance provisions.

Base rate and reasoning

Reference class: dominant chipmakers. Intel, Qualcomm, Rambus and Broadcom were all eventually charged by the Commission and/or the FTC, typically 6–12 years after their dominance became obvious. That happens to roughly one firm every five years. Nvidia's dominance (about 80% of AI accelerators) became salient around 2023, so this five-year window catches the early part of that typical lag. The window is also politically damped: the Trump agencies run until January 2029, the EU fears US retaliation and depends on Nvidia, and Biden's aggressive enforcers never got beyond investigating Nvidia.

Estimated contributions by end-2031 (roughly independent):

• Commission statement of objections against Nvidia: about 9%.
• Other Commission AI-market dominance cases: about 3%. This includes the uncertainty over whether an "AI assistants" market would count as a market for AI models.
• US agencies before 2029: about 3.5%.
• US agencies 2029–31: about 9%. Democrats are priced at about 60% to win in 2028; I assume roughly 13% if they win and 3% if they don't, because new big-tech monopolisation suits usually take 2–3 years from inauguration.
• CMA: about 1%.

Combined, that is about 23%. I shade it to about 21% for correlation between these routes and for the chance that the AI market either crashes or changes so much that antitrust stops being the tool used.

Quarterly hazards rise from 0.3% (rest of 2026) to 0.5–0.9% (2027–28) to 1.0–1.7% (2029–31). I computed the series in Python.

Strongest counter-arguments

• Higher: Nvidia's conduct is textbook dominance material: vertical deals (Hugging Face, Groq, Poolside), customer financing with conditions on who customers can lease to, and the CUDA software ecosystem. The Commission has new guidelines on exclusionary abuse, and a probable 2029 Democratic administration could revive the 2024 Justice Department probe. That argues for about 30%.
• Lower: nothing has happened after more than three years of scrutiny. The Commission increasingly uses the Digital Markets Act (excluded) and settles cases through commitments without a statement of objections. Custom chips (Google's TPUs, Amazon's Trainium, OpenAI's Jalapeño) may erode Nvidia's share. That argues for about 12%.

I stay near 21%.

Question. By the last day of each quarter, has the US Department of Justice (DOJ), the US Federal Trade Commission (FTC), the European Commission, or the UK Competition and Markets Authority (CMA) filed a complaint or issued a statement of objections alleging monopolisation or abuse of dominance in a market for AI models, AI chips, or AI compute?

Definitions.

• Complaint or statement of objections: a civil judicial complaint filed by DOJ or FTC, an FTC administrative complaint formally issued, or a statement of objections formally issued to respondents by the European Commission or CMA. Amended complaints and supplementary statements of objections count. A statement of objections concerning interim measures counts if it contains the required allegation. An announced intention, authorisation to file, draft, or complaint submitted to an agency does not count.
• Monopolisation or abuse of dominance: an allegation of monopolisation, attempted monopolisation, or conspiracy to monopolise under section 2 of the Sherman Act; an FTC Act section 5 claim expressly alleging such monopolistic conduct; abuse of a dominant position under Article 102 TFEU; or abuse under Chapter II of the UK Competition Act 1998. Equivalent successor provisions count. Merely alleging market power, concentration, or unfair competition is insufficient.
• Qualifying market: an expressly identified relevant product market or submarket for supplying AI models (including model licences, weights, or model access through APIs), processors or accelerators for training or running AI, or computing capacity supplied for AI training or inference. Geographic scope and model capability level are unrestricted. The source need not use these exact labels, but must expressly identify the product and its AI function. A broader market for cloud services, semiconductors, software, search, messaging, or AI-enabled applications does not qualify solely because it includes AI products or customers.
• In a qualifying market: the qualifying market must be one in which monopolisation is alleged or in which the respondent is alleged to hold and abuse a dominant position. Dominance solely in an adjacent market, used to disadvantage AI competitors, does not suffice. No respondent need be a covered developer.

Resolves YES if a qualifying official source confirms that at least one named authority has filed or issued a qualifying document containing the required allegation. An agency's official summary is sufficient if it establishes the document's issuance, legal allegation, and qualifying market, even if the full document is confidential. The allegation need not be upheld; subsequent withdrawal, settlement, dismissal, or reversal does not undo YES.

Resolves NO if no qualifying confirmation is published by the quarter-end. Excluded are investigations, subpoenas, information requests, staff reports, market studies, market-investigation findings, merger challenges alleging only reduced competition, cartel-only claims, Digital Markets Act enforcement, UK strategic-market-status proceedings, private lawsuits, and filings by authorities other than the four named. A private complaint does not count merely because an agency files an amicus brief or statement of interest.

Resolving source. Official case documents and releases from DOJ (justice.gov, including its Antitrust Division case filings), FTC (ftc.gov, including its Cases and Proceedings records), the European Commission (its Competition Cases register and Press Corner), or CMA (gov.uk/cma-cases); alternatively, the publicly accessible court docket containing DOJ's or FTC's filed complaint. These are the exclusive resolving sources, narrower than Public confirmation (A2); respondent disagreement does not disqualify an official allegation. Apply Resolution date (A3) and the Resolution window. A later historical reference to a document publicly issued before opening does not qualify; a newly issued amended complaint or supplementary statement may qualify independently.