The Bank of England warned of "growing risks of a global market correction" from AI technology firm overvaluation. The warning came as the five largest US technology companies committed to spending $650–690 billion on AI infrastructure in 2026 , nearly double the previous year — capital deployment without historical parallel outside wartime industrial mobilisation.
The BoE's Financial Policy Committee monitors systemic risk across one of the world's largest financial centres. Its assessments feed directly into macroprudential regulation: capital buffers, stress-test scenarios, and counterparty exposure limits for UK-regulated banks. When the committee identifies a specific sector as a correction risk, the warning carries regulatory consequence — British and European banks with significant technology equity exposure face the prospect of tighter supervisory scrutiny.
The gap between capital deployed and revenue generated is the central tension. Meta set AI capital expenditure at $115–135 billion for 2026 , while according to Barclays, its free cash flow is forecast to drop as much as 90% as that spending hits 1. Microsoft faces a roughly 28% decline over the same period 2. Morgan Stanley countered that median cash flow and capital reserves among the top 500 US firms are approximately three times those during historical bubble periods 3 — but that addresses balance-sheet resilience, not return on investment. The question is not whether these companies can afford to spend, but whether the spending generates commensurate revenue before investor patience runs out.
The BoE intervention follows the Citrini Research report positing a feedback loop where AI-driven layoffs reduce consumer spending, creating margin pressure that forces more AI investment and further cuts . Citadel Securities dismissed the scenario , but it evidently registered with institutional risk monitors. Q2 and Q3 earnings calls will determine whether return-on-investment data validates the spending wave, or whether the gap between capex commitments and demonstrable revenue triggers the correction the BoE NOW considers a material risk.
