In its latest quarterly financial stability record, the Bank of England warned that vulnerabilities across the financial system are becoming more interconnected, raising the odds that multiple risks crystallize at once. Policymakers identified the multi-trillion dollar AI market as a major vulnerability and cautioned that valuations could suffer a steeper pullback than in July, a backdrop that could weigh on the world economy and government bond yields.
They also highlighted renewed Middle East hostilities as a factor that could trigger a longer-lasting adverse supply shock for the global economy, increasing risks around sovereign bonds. July's AI shock, the BOE said, was amplified by "an unwinding of stretched positions and associated deleveraging activity" but there was "no spillover to core markets." Officials said they have repeatedly cautioned about possible bubbles across AI-linked equities, parts of credit, and government debt.
The BOE added that growth prospects are now partly tied to hopes that AI will boost productivity, so a rethink of those expectations could hit not just AI-related asset prices but also sovereign debt markets.
Since the last review, AI shares have swung on fears of a slowdown in development, while equities more broadly have been choppier. In that backdrop, several firms - such as smart-ring producer Oura - have postponed planned IPOs. In its semiannual systemic risk poll, more respondents than ever flagged AI-related dangers.
The BOE noted that hedge funds' use of leverage tied to gilts is still high, cautioning that "persistently higher sovereign yields could contribute to tighter financing conditions for households and business and increased market volatility."
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The BOE has held rates since its prior stability assessment. Derivatives markets currently imply up to five hikes by the end of 2027, beginning in November. Financial stability officials reiterated that households are still able to cope with rising debt costs and that banks hold ample capital to endure potential shocks.
Despite broader worries about leverage, the BOE said additional study backs its July plan to ease the hard cap on banks' leverage. The review found that dangers tied to leverage in the gilt market are best addressed via forthcoming reforms to that market - set to go out for consultation in early 2027 - instead of relying on the leverage ratio that applies to banks' balance sheets. Officials will keep watch and, should the risk outlook shift, could lift the buffer on banks' leverage ratios by 25 basis points.
In a Bank Insights article published Wednesday morning, Governor Andrew Bailey wrote that AI has "important implications" for financial stability and emphasized the need for "rigorously testing" the capabilities and features of AI so as to reduce the risk of cyber threats. "Over time, a more formal regulatory framework may well emerge," he wrote.
The through line here is simple: markets are leaning on AI to deliver productivity gains, and if that faith wobbles, the BOE thinks the fallout will not be confined to tech. Watch the bond market for early tells. The BOE is flagging the combo of higher sovereign yields, tighter financing, and still-elevated leverage as the pipes that carry AI shock into the broader economy and, by extension, into everyday borrowing costs and volatility.
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