US Treasury proposes rules to block American investments in AI and semiconductors

The rules build on a 2023 executive order that first created outbound-investment screening for US capital flowing into Chinese quantum computing, AI and semiconductor firms, a mechanism Congress then hardened into statute. The Comprehensive Outbound Investment National Security Act, passed in 2025, moves that screening from agency guidance into formal Treasury rulemaking. The five named targets largely mirror existing US sanctions lists rather than creating a new category of adversary.

Venture funds, private equity firms and corporate investors backing AI, semiconductor, biotech or advanced-computing ventures tied to the five listed countries will need to file notifications once a deal clears $50,000, a threshold low enough to capture early-stage and seed rounds, not just large transactions. Smaller funds gain a narrow exemption below that line, while larger investors must build compliance teams to track counterparties across six newly defined technology sectors before closing any cross-border deal.

Washington frames the restrictions as protecting national security, but blocking capital also blocks the visibility that comes with being inside a deal: investors who can no longer fund rival labs also lose early insight into what those labs are building. That trade-off, cutting off collaboration to slow a competitor's progress, is the same one that shaped export controls on chips, and it rarely satisfies both goals at once. Critics argue it may simply push Chinese AI and semiconductor financing toward domestic or allied capital instead. (per cryptobriefing.com)

The public comment period runs through Dec. 7, after which Treasury will issue a final rule that could adjust the $50,000 threshold, narrow or widen the six covered sectors, or add exemptions for passive investment vehicles. Industry groups representing venture capital are expected to push for carve-outs before that deadline. The final text, not this draft, will determine how many existing fund structures need restructuring to stay compliant.