AI could cause global economic downturn, Andrew Bailey warns G20 - BBC News BBC Homepage Skip to content Accessibility Help Your account Home News Sport Earth Reel Worklife Travel Culture Future Music TV Weather Sounds More menu More menu Search BBC Home News Sport Earth Reel Worklife Travel Culture Future Music TV Weather Sounds Close menu BBC News Menu Home Climate World UK Business Tech Science Entertainment & Arts Health In Pictures More BBC Verify Newsbeat Tech AI could cause global economic downturn, Andrew Bailey warns G20 Image source, Reuters By Ruth Comerford Published 31 August 2026 Updated 1 September 2026 The governor of the Bank of England has warned G20 finance ministers that artificial intelligence could cause a global economic downturn and pose a significant cyber security risk to financial systems. Andrew Bailey said any collapse of growth in the AI sector could lead to a "future market correction" that spreads worldwide. In an open letter to finance ministers in the US on Monday, he said companies around the world should prepare for security breaches "involving simultaneous disruption across multiple firms". Earlier this month, a group of 100 firms , including Google, Microsoft, Anthropic and OpenAI, urged countries and groups to beef up their cyber defences before AI grows powerful enough to override them. Bailey told the G20 finance ministers that a combination of highly priced stock markets, increased borrowing by investors, and the growing concentration of money into a small number of major technology companies could amplify any future market correction. "The issue is not simply that investors are borrowing more, but that leverage is interacting with high valuations and market concentration, in particular the increasing cross-investment between artificial intelligence (AI) companies and hyper scalers, in a way that could amplify a future market correction," he said. Bailey has called on those in charge of financial security to develop "appropr