Bank of England Governor Warns AI Investment Bubble Could Trigger Financial Market Shocks and Threaten System Stability

Bank of England Governor Andrew Bailey, speaking exclusively to the BBC on 1 October 2026, issued a public warning that the enormous volumes of investment flowing into artificial intelligence companies carry systemic financial risk, and that the Bank is monitoring the sector 'very carefully'. Bailey noted that Nvidia, the AI chipmaker, currently carries a market valuation of $5.5 trillion, and that technology giants including Alphabet, Meta, Microsoft and Amazon are collectively spending hundreds of billions of dollars on AI development. He also flagged that Anthropic and OpenAI are preparing to sell shares in their firms on the US stock market, a move he said could push further hundreds of billions of dollars into the sector. Bailey drew an explicit parallel with the history of internet search, pointing out that Netscape was the first major player before being displaced by Google, and warned that current asset valuations assume universal success among AI companies: 'Everybody is currently priced to be a winner.' He acknowledged that 'some correction of asset prices' was possible and said the Bank was 'prepared for the fact that there will be some shocks come along to markets'. Beyond valuation risk, Bailey flagged AI-enabled cyber attacks as a growing threat, describing AI as creating 'a much more powerful way of uncovering vulnerabilities' in operating software. He also raised concern about the proliferation of deepfakes, citing his own experience of fabricated images circulating on social media. On the benefit side, Bailey said AI's capacity to speed up analytical work supporting the Monetary Policy Committee (MPC), the body that sets UK interest rates, was a positive development, though he was clear the technology would not replace human decision-making.