Treasury Proposes Ban on US Stakes in Chinese AI Developers

The US Treasury Department on 22 October 2026 proposed a rule that would bar US investors from backing companies in China and other “countries of concern” that develop any AI system, which the rule calls an “SI system”. Under the current rules, many such deals only had to be reported; the proposal “would eliminate the existing notification requirement for these transactions,” Treasury’s fact sheet says.

The notice of proposed rulemaking implements the Comprehensive Outbound Investment Security (COINS) Act, passed as part of the 2026 National Defense Authorization Act. The NPRM says written comments “must be received by December 7, 2026,” and Treasury’s FAQs say: “That effective date will be published in the final rule.”

Business Pill · SOVEREIGN AI

A short Business Engineer explainer on sovereign AI: who controls the model and the data. It teaches the general idea only and says nothing about any company, investor or government in this piece.

What Treasury Proposed

The proposal covers AI and five other technology areas:

• AI moves to the prohibited list. Treasury would “include development of any SI system within the definition of prohibited technology”, the NPRM says. A prohibited transaction “could not legally be undertaken.”
• No compute threshold. Treasury “has not proposed any technical parameters within which the U.S. Government can permit a covered national security transaction into the SI systems or quantum information technologies sectors.”
• Agents and robots count. The proposed definition of an SI system includes software or hardware that runs on such a model, “including a harness for agentic capability or an embodied SI system”, and robotic or other autonomous systems.
• A carve-out for internal use. Using an off-the-shelf third-party SI system “strictly for internal, non-commercial purposes” does not count as development on that basis alone, the proposed rule text says.
• Why the name changed. The fact sheet says an executive order of 29 September 2026 requires the terms Super Intelligence and SI in place of Artificial Intelligence and AI in certain documents.

What Was Posted on X

Posting on 22 October, @choblin29 summarised the proposal: a ban on covered US investments in AI technologies in China, Russia, Iran, North Korea and Cuba, with publicly traded securities and transactions under $50,000 exempt, Venezuela removed from the list and comments closing on 7 December. The post also paraphrases Treasury’s reason for choosing a ban: that AI has advanced so fast in two years that it raises questions about the efficacy of regulating, or even distinguishing, the most advanced models.

Why Treasury Dropped the Threshold

The current rules sorted AI deals by “the quantity of computing power for training, designed end uses, and intended end uses,” the NPRM says. Treasury now argues that measure no longer works:

• On capability. “No single measure, benchmark, or threshold is currently sufficient to distinguish advanced models.”
• On how models improve. Developers “increasingly rely on additional methods to improve model capability,” the NPRM says, including synthetic data, algorithmic efficiencies, post-training techniques and inference-time compute.
• On open models. “The availability of capable open-source SI models that have fewer safeguards and oversight may lead to their utilization and incorporation into SI systems in contexts outside their intended scope.”
• On compliance. Treasury says the approach avoids relying on a US person “ascertaining the technical capabilities or thresholds of SI systems being developed by a covered foreign person.”

Who and What Is Covered

• Countries. The COINS Act and the proposed rule define a country of concern as China (including Hong Kong and Macau), Cuba, Iran, North Korea, Russia and Venezuela under the Maduro regime. The fact sheet says Venezuela no longer meets that definition because the US recognised a new head of state on 5 March 2026.
• Deal types. Covered transactions include a US person’s acquisition of an equity or contingent equity interest in a covered foreign person, and certain loans that carry equity-like rights.
• Exceptions. The fact sheet lists publicly traded securities, index funds and ETFs, LP investments in pooled funds where committed capital does not exceed $2 million, and other categories. Transactions that, in the aggregate across the preceding 12 months, “do not exceed $50,000” are excepted from the notification requirement only.

The Table: Six Sectors

The table lists the six technology areas in the proposed rule and what each would change.

Summarised from Treasury’s fact sheet and FAQs on the proposed rule, 22 October 2026.

What We Reported Before

• Our piece on DeepSeek’s $15 billion round covers Bloomberg’s report, via Reuters, that CATL and Tencent were among the biggest investors.
• Our piece on the DeepSeek and Huawei financings covers reports naming CATL and Tencent among DeepSeek’s investors and six Chinese lenders behind Huawei’s loan.

The Structural Read

As we read it, the proposal moves the technical judgement away from the investor: Treasury says the approach avoids relying on a US person “ascertaining the technical capabilities or thresholds of SI systems being developed by a covered foreign person.”

As we read it, the definition reaches beyond model labs: the proposed SI system definition includes “a harness for agentic capability or an embodied SI system”, which covers application builders and robotics companies, not only model developers.

As we read it, the country list is the other change: the fact sheet lists Cuba, Iran, North Korea, Russia and the Maduro regime of Venezuela as additions to China, and says Venezuela does not meet the definition today.

Three Implications

FOR US INVESTORS The fact sheet lists exceptions including publicly traded securities and LP investments where committed capital does not exceed $2 million; the $50,000 de minimis exception applies to the notification requirement only.

FOR AI COMPANIES IN THE NAMED COUNTRIES The proposed rule text says use of an off-the-shelf third-party SI system strictly for internal, non-commercial purposes does not count as development on that basis alone.

FOR COMMENTERS The NPRM says written comments must be received by December 7, 2026; the effective date will be published in the final rule, Treasury’s FAQs say.

The Business Engineer Lens

This story maps onto the Business Engineer framework AI’s Geopolitical Chokepoint.

The framework argues that the AI race is creating “geopolitical leverage that operates independently of who has the best models”, located in physical inputs such as processed minerals.

As we read it, Treasury’s proposal works a different lever, US capital, on the same principle: its scope does not depend on how capable a given model is. The framework was published in December 2025 and discusses materials, not investment rules.

What Is Not Established

This is a proposed rule. Treasury says it will publish the effective date in the final rule, and that the published Federal Register version may vary slightly from the document Treasury posted. The current regulations took effect on January 2, 2025, the NPRM says. The proposal does not name companies or list deals it would cover, and this piece does not assess any specific investment.

The Bottom Line

Treasury’s proposed COINS Act rule would move AI from a mix of notified and prohibited deals to a prohibition on US investment in country-of-concern entities that develop any SI system, without a compute threshold. Treasury says no single benchmark now separates advanced models. Treasury lists December 7, 2026 as the comment deadline.