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The Bank of England’s Financial Policy Committee says the chance of several financial vulnerabilities crystallising together has increased since July. It points to higher sovereign yields, growing AI-related borrowing and cyber risks, while judging UK households, businesses and banks resilient overall. The committee kept the countercyclical capital buffer at 2% and backed planned leverage ratio reforms.
The Bank of England’s Financial Policy Committee said on September 30 that risks to UK financial stability had worsened since July, as higher sovereign yields, growing AI-related borrowing and cyber vulnerabilities increase the chance that several stresses hit at once. The committee kept the UK’s countercyclical capital buffer at 2%, saying banks remain able to support households and businesses through a downturn.
The record of the committee’s September 25 meeting links the more adverse outlook partly to renewed conflict in the Middle East and higher oil, gas and refined product prices. The FPC said the resulting supply shock had added uncertainty about economic growth and interest rates. Sovereign bond yields in several advanced economies had risen to levels not seen since 2008, tightening financial conditions. So far, the committee said, market adjustments had been mostly gradual and the financial system had remained resilient.
The committee highlighted risks around AI investment and financing. It said AI-related debt issuance was growing rapidly and spreading exposure across investors and funding markets. The record cites Morgan Stanley’s estimate that global AI-related debt issuance was about $450 billion as of early September, more than double total issuance in 2025. That is an attributed estimate, not a final full-year total. The FPC said rising debt, opaque financing and occasional circular arrangements could make risks harder to assess and amplify losses if expectations disappoint.
It also pointed to July’s sharp falls in AI-related and semiconductor share valuations. Some leveraged investors were forced to unwind positions, amplifying market moves, but the FPC reported no spillovers to core markets and no signs of broader systemic stress. Separate concerns stem from frontier AI test incidents in which autonomous models took unexpected actions. The committee urged firms to prepare for related cyber and operational risks, using guidance from regulators, the National Cyber Security Centre and sector groups.
Domestically, the FPC said household and corporate vulnerabilities were broadly unchanged. UK banks remained appropriately capitalised and highly liquid, and past stress tests indicated they could withstand a severe energy price shock and downturn while continuing to lend. The committee also agreed to proceed with proposed leverage ratio reforms; the Bank expects to consult on them in early 2027.
Pressure Builds Across Financial Markets
The FPC’s concern is that risks may reinforce one another. Higher energy costs can weigh on growth while raising inflation and interest rate uncertainty. Persistently high sovereign yields can tighten borrowing conditions for households and companies, while leveraged positions in government bond and equity markets may amplify abrupt repricing.
The committee’s attention to AI reflects its growing links to both markets and firms’ operations. If expected AI earnings or productivity gains are revised down, valuations and debt-funded investment could be affected. The FPC said such a reassessment could also influence sovereign debt markets because some growth and fiscal outlooks depend on expected AI-driven productivity. At the same time, cyber incidents could disrupt financial firms. These are risks the committee identifies; it does not say a broader disruption has occurred.
For the UK, the 2% capital buffer decision signals that the FPC sees banks as able to absorb losses while maintaining lending capacity under current conditions. It also highlights the committee’s balancing act: preparing for shocks while avoiding a response that unnecessarily restricts credit.
How the Committee Is Responding
The FPC meets to assess threats to UK financial stability and agree measures aimed at helping the system absorb shocks. At this meeting, it considered global market pressures alongside conditions for UK households, businesses and banks. Its record says household and corporate debt vulnerabilities were broadly unchanged since the July 2026 Financial Stability Report, while economic growth had been somewhat more resilient than expected despite higher energy prices and borrowing costs.
The countercyclical capital buffer is a requirement banks hold against UK exposures. The committee described 2% as its neutral setting, intended to give banks capacity to absorb unexpected losses without an unwarranted restriction in lending. Separately, the FPC backed proposed leverage ratio changes previously outlined in July. It said added bank leverage capacity could increase market leverage, making work on gilt repo market resilience more important. The Bank plans to publish an update on that work, including possible policy proposals, in early 2027.
The committee also cited the ongoing private markets System-Wide Exploratory Scenario exercise as a way to fill data gaps and improve understanding of how private financing might function under stress. It said parts of private credit remain vulnerable if financing conditions tighten.
Scale of Future Market Strains
The record does not establish whether the identified vulnerabilities will crystallise, when that might happen or how severe any resulting disruption could be. It says the risk of a sharper market adjustment persists, including if AI earnings expectations change significantly, but reports that July’s sell-off did not spill over to core markets.
The full effects of higher energy prices, sovereign yields and AI-related borrowing also remain uncertain. The FPC describes estimates of AI debt issuance and future investment as external analyst estimates, not settled outcomes. It says opacity and circular financing arrangements can complicate risk assessment, but the record does not quantify the potential losses. Its assessment of UK resilience is aggregate; the committee notes that some highly leveraged businesses and energy-exposed firms remain vulnerable.
Consultation and Risk Monitoring
The Bank expects to consult on the proposed leverage ratio reforms in early 2027. It also plans to publish an update on measures to improve gilt repo market resilience, including potential policy proposals, in the same period. The FPC said it would continue monitoring market leverage and could consider a higher general leverage ratio buffer if it later judged risks to be heightened and additional resilience warranted.
Meanwhile, the committee expects firms to keep preparing for AI-related cyber and operational risks, and the private markets exploratory scenario work is underway. The record does not give a date for its findings. The FPC said analysis supporting its climate-risk judgements would appear in a forthcoming Bank Insights article.
Key Questions
What did the FPC decide about UK bank capital?
It kept the UK countercyclical capital buffer at 2%, its neutral setting.
Why did the committee say financial risks had increased?
It cited renewed Middle East conflict, higher energy prices and sovereign yields, growing AI-related debt, and risks in leveraged and risky credit markets. The committee said these vulnerabilities may be more likely to crystallise together.
Did the FPC report a financial market crisis?
No. It said the financial system had so far been resilient and that July’s AI-related market falls had not spilled over to core markets. It warned that the risk of a sharper correction persists.
When are the leverage reforms expected to be consulted on?
The Bank expects to consult on the proposed reforms in early 2027. It also plans an update on gilt repo market resilience work around that time.
Source: primary
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