Bank of England Governor Andrew Bailey is warning that advanced “frontier” AI models could materially increase cyber risk across the global financial system by making attacks faster, cheaper, and more scalable. In a letter to G20 finance officials, he said financial firms need stronger defenses and contingency plans for simultaneous disruptions. Writing in his capacity as chair of the Financial Stability Board, an international body that coordinates policy and makes recommendations to national authorities, Bailey identified the potential impact of frontier AI — which refers to the most advanced AI models — on cyber risk as “the most immediate concern” for the financial system.

“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,” Bailey said. “Recent developments have also highlighted to me that many jurisdictions do not have the protocols in place to manage the development, release, and deployment of advanced frontier AI models, heightening risks for the financial sector and beyond,” he added.

[…] Financial institutions and technology providers will need to improve vulnerability management, response and recovery capabilities — “and prepare for more severe scenarios involving simultaneous disruption across multiple firms or shared technology dependencies,” Bailey said. Alongside new AI models, Bailey cited “fragilities” in sovereign debt markets, the growing use of debt by investors in equity markets and stretched asset valuations, particularly AI-related investments, as among his concerns.