BOE Governor warns AI cyber threats could destabilize global financial system

Bank of England Governor Andrew Bailey, who also chairs the Financial Stability Board (FSB), warned in a letter to G20 finance ministers and central bank governors published August 31 ahead of the G20 meeting in Asheville, North Carolina, that frontier AI models pose the most immediate threat to the global financial system through their impact on cyber risk .

Bailey wrote that "frontier AI may have the ability materially to alter the speed, scale and economics of cyber risk, which could undermine market confidence system-wide, especially due to highly concentrated third-party service providers." He described frontier AI models as showing "growing autonomy and more capable problem-solving, along with an expanding range of threat capabilities," and said many jurisdictions still lack protocols to manage how the most advanced models are developed, released, and deployed.

Beyond cyber risk, the letter separately flagged that markets "remain vulnerable to a potential disorderly correction," with leverage interacting with high valuations, market concentration, and AI-related optimism in ways that could amplify a future downturn.

Bailey called on jurisdictions to "take appropriate steps to support safe and responsible model release and deployment" and on financial firms to strengthen "robust response and recovery capabilities and resilience amongst critical third-party technology providers."

As FSB chair, Bailey is not an outside voice echoing his own central bank's concerns, this warning is the FSB's own official position. Analysts will watch whether G20 members move toward coordinated AI governance standards, and whether regulators can keep pace with concentration risk among the few technology providers underpinning AI infrastructure.