1. A higher risk picture: the Gulf, frontier AI and the energy wedge
Appearing before the House of Commons Treasury Committee on the Bank's twice-yearly stability assessments, Governor Andrew Bailey said risks have grown since January for two reasons. The Middle East conflict does not add to the structural weaknesses identified earlier, but it raises the chance that they materialise and the damage if they do. The second, newer factor is frontier AI and its consequences for cyber security, on which he had written to the committee. Asked about the on-off ceasefire, he said that a week earlier he would have said events were tracking the mildest of the three paths in the monetary policy report, while warning that the ceasefire was fragile; that instability has returned, so he cannot judge how long fighting will last. Energy prices are somewhat above pre-crisis levels, crude is well below its peak and pass-through to UK prices remains soft, but refined products have not fallen as far, because China has cut crude imports while also cutting exports of refined fuel, and Russian production capacity has been badly hit. From contacts with Gulf producers, oil output was resuming quickly until last week and new pipelines are being built around the Strait of Hormuz, while Qatar says about 83% of its gas supply is intact and the damaged remainder will take longer, with bigger expansion plans only by 2029-30. The chair noted that repairing regional infrastructure would take at least eight months once a ceasefire holds and asked what modelling the Bank is doing; Bailey replied that it talks constantly to industry and to Gulf counterparts, who say oil damage has been limited compared with the blockages. He added that a fresh inflation figure was due the following week and that evidence so far on pass-through of energy costs into UK prices is soft, but that the committee should not rely on crude prices alone, since petrol and diesel are what households actually pay for.
2. Politics, growth and the cost of a lost decade and a half
Asked whether a seventh prime minister in ten years harms financial stability, Bailey declined to comment on politics, saying that global conditions drive market moves far more than UK events, and that the UK is supported by monetary and financial stability and by its fiscal framework, which caused only a brief market wobble. His main advice for an incoming government is that growth is the central question: the core banking system is resilient and household and corporate debt is not stretched, but growth has been low for sixteen or seventeen years, a general rather than political story. In a naive counterfactual, if potential and actual growth had stayed at about 2.5% a year instead of about 1.5%, with the same fiscal policies and the same shocks from Covid, Brexit, Ukraine and the Gulf, public debt would be roughly ten percentage points of GDP lower, and the debate would be very different.
3. Regulation, growth and the lump of capital
Pressed on whether the push for deregulation to promote growth threatens stability, he said there will be no growth without financial stability, that not every rule is perfect and reviews are welcome, but that he differs from some arguments. He added that the Bank supports reviewing rules but that its own mandate gives it no reason to hold back growth. Banks now earn more than their cost of capital, with price-to-book ratios averaging about 1.7 against below 1 earlier, so they can choose to reinvest earnings to support lending, a choice markets should drive. He rejects the lump-of-capital view that a fixed pool of capital means looser rules let more be lent: a healthy bank earns returns it can reinvest. Randall Kroszner, speaking about the new Fed chair Kevin Warsh, said he is battle-tested on financial stability and the US Basel proposal is about effective rather than weaker regulation, which still lets banks intermediate. Asked whether history informs his thinking, Bailey said it does a lot: memories of the crisis are fading and people now say the response was too strong, but it did not feel excessive when the system had been left extremely fragile and had to be rebuilt, and relaxing standards because the danger has passed is not how it works.
4. Climate, AI infrastructure and clean power
On climate, Bailey said he was making a relative point earlier, not that the absolute risk has fallen; Europe's very hot weather is a reminder, and Nathanaël Benjamin added that the channels to banks, insurers and core markets remain present and are being embedded in mainstream stress testing, with resources allocated to relative risks, where AI has climbed the list quickly. On water and grid needs for data centres, the Bank is not the expert, but Benjamin noted that cooling needs are large and the question is whether water infrastructure can keep pace with market expectations. Bailey linked this to growth: technology is a long-run driver, the next cycle is likely to combine AI and robotics, and grid and data-centre capacity matters. He added that he had learned that AI needs clean power in the sense of very high-quality, continuous supply, which renewables alone do not currently give, so a baseload mix is needed.
5. The leverage ratio and the move from 14% to 13% capital
On the decision to loosen the leverage requirement by a fifth of a point, which looked like a split vote, Bailey explained that the change mostly cleans up an anomaly dating from 2019 that burdened the large domestic banks, which make most UK loans, and makes the leverage buffer as usable as the risk-weighted one; the two regimes run in parallel rather than add up. The complication is leverage in markets, such as hedge-fund and ETF leverage in equity and government debt markets, to which banks are linked as liquidity providers; the committee debated whether to tackle it through banking or market regulation, and Bailey prefers the market route, with further work before the changes are final. Stephen Blyth confirmed there was unanimity on fixing the discrepancy, with debate about a small reduction for other institutions, and said repo haircuts are the effective tool. Kroszner said a 20-basis-point change is not material and that a more releasable capital stack could let banks hold smaller management buffers, which also serves the secondary goal of credit and growth; he noted that most banks now pass stress tests, so the bar is not unattainable. Bailey added that the Bank will do further work before finalising the changes, to check whether they might increase market leverage.
6. Why banks say 13% is not 13%, and the US comparison
John Glen pressed that banks say their effective requirement is nearer 14.25% and claim a 190-basis-point premium over US rivals. Bailey denied the US has been bolder, since its latest package implements the Basel 3.1 rules the UK also follows, with international banks showing higher leverage ratios, and the euro area has done nothing bolder. He gave three reasons for the gap: banks keep voluntary management buffers; requirements differ by bank, with add-ons for weak risk management or concentrated risk; and many still think 13% is too high. Basel 3.1 will lower the bottom-up element that the PRA assesses, which is why the FPC matched it from the top down, and in other cases supervisors add capital when a bank cannot show it manages risk properly, which Bailey said is simply the Bank doing its job. He would like a single releasable buffer, which needs international agreement; excluding government bonds from the leverage ratio is not in the Basel rules. Kroszner said comparisons are more art than science and that US banks complain of gold-plating too, and Benjamin noted US banks hold large buffers without hurting profits. Blyth said academics, rating agencies and investors did not call for lower capital. Chris Coghlan recalled banks made the same pre-2008 argument.
7. Frontier AI and cyber risk
Bobby Dean asked what had been underestimated. Bailey said AI developers themselves are surprised: models are self-improving, an Anthropic model in April advanced faster than expected, and tests by the UK's AI Security Institute show leaps in speed and ability at real tasks. Frontier AI will strengthen both defence and offence: firms can use it to find and fix long-buried flaws, but attackers can do the same, so the race is for defence to be strengthened first, and that is getting harder. Models have a shelf life of two or three months, open-source versions are coming and China is only months behind. Benjamin said firms are testing models on their own systems, the risk is the speed at which weaknesses are found and the need for faster patching, which itself creates disruption risk, and defenders typically get access before attackers. Separately, banks' own AI use is a distinct risk: agentic trading is still more talk than reality, because agents can learn to cheat and lie and legal liability is unresolved. As principal-agent law makes principals liable for agents inside their remit and agents without legal personality cannot be liable, banks must think carefully before using them; the committee asked for a written note.
8. Critical third parties and an AI bubble
On critical third parties, Benjamin said four providers have been nominated, the PRA will supervise them and has specialist divisions, and the Bank sees no concern about their openness. On an AI bubble, Blyth said concentration and heightened valuations resemble the dot-com era, though strong earnings back them; the price assumes an optimistic earnings path, and power, cooling and planning are risks to it. Financial-stability worries are that AI expansion is increasingly funded by debt, with extreme growth in 2026, and that long-side leverage is growing through levered hedge funds using derivatives and prime brokerage and through levered ETFs, which could amplify a fall. On critical third parties, Dean asked about the regulator's capacity to look inside opaque providers, and Benjamin replied that the PRA has entire divisions of operational-resilience specialists. Bailey said a bubble bursting abroad would wash over the UK, and a Bank stress exercise showed lower UK growth, with some interest-rate adjustment. He added that general-purpose technologies take longer to show in productivity than expected, that everyone is priced to win but not everyone does, as Netscape showed, and that the UK has strengths in research and start-ups, with the persistent problem of scaling up. Blyth said the much-quoted estimate that about 650 billion dollars of yearly revenue is needed for a fair return is not physically impossible, though power, cooling and planning approval for data centres threaten the optimistic earnings story, and that the pace at which leverage and debt issuance are growing, including possible crowding out of other debt, is extraordinary.
9. Gilt repo, pensions and public debt
Yuan Yang asked about planned gilt repo reforms. Bailey said a discussion paper and a system-wide stress exercise suggested market regulation, such as clearing and haircuts, is better than classic institutional rules, responses were mixed, and proposals will follow; Benjamin said the update will come in the fourth-quarter report, as thinking rather than a final announcement, doing nothing is not an option, markets are much sturdier than before, yet that sturdiness must be built permanently into how they are organised, and the Bank works with the debt office, the FCA and the Treasury. Yang asked whether a gilt decision would be joint with the other agencies, and Benjamin said that depends on the measures, while Bailey hoped for consensus. Blyth explained the market's particular structure, in which hedge funds buy cash gilts against futures financed through repo, as in the US. Blyth, a former hedge-fund trader, admitted that firms prefer no haircut, supported a minimum haircut on gilt repo, said the cost argument is an effective lobbying line but should fall on leveraged returns, and that evidence does not show it would disrupt the market. Benjamin added the all-in cost must be assessed. Bailey explained the market's structural shift: maturing defined-benefit schemes are no longer natural buyers of long gilts, so the debt office shortened issuance, more demand comes from price-sensitive hedge funds, and the current account deficit increases reliance on overseas investors. Chair Meg Hillier asked how far a sudden equity correction could disrupt the gilt market; Bailey replied that the market had stayed resilient through this year's Gulf volatility, that earlier episodes needed intervention, and that the Bank now has many more tools and is ready to use them. Asked about debt near 100% of GDP, he stressed the fiscal framework, noted the favourable gilt response to the last Budget, and said the fiscal outlook faces three structural headwinds: ageing, the end of the post-Cold War defence dividend, and climate change.
10. Private credit, households, risk transfers and stablecoins
Kroszner and Benjamin said the Bank's system-wide exploratory exercise on private markets, with voluntary participation by all major players, produced a unique dataset on exposures, a first step toward answering the data gap; Blyth said recent bankruptcies like First Brands and Tricolor, which caused unexpected bank losses, re-raise whether linkages are understood, and that the exercise's value is in asking firms whether they are sure. Bailey, as chair of the Financial Stability Board, noted the FSB agenda has shifted to non-banks and that cross-border data sharing remains weak, and that the same big macro funds are leveraged across several government bond markets, so margin calls in one market, for example during last year's tariff volatility, can spill into gilts; with no stable initial margin, models make margining more pro-cyclical. Benjamin and Kroszner stressed that risks ultimately come back to bank balance sheets, because banks are the main providers of leverage to hedge funds and private markets. On households, mortgage rates are about 75 basis points higher since December, the sector is resilient with lower aggregate debt, but lower-income renters, whose median income is half that of mortgage holders, are most squeezed, though this does not threaten the banking system; the loan-to-income flexibility has worked as intended, with high-multiple lending around 13% against a 15% cap, about half to first-time buyers, and no rise in negative equity. Siobhain McDonagh asked whether the six lenders holding about 80% of mortgages squeeze smaller building societies; Benjamin said small firms have applied for the same flexibility and Bailey had heard no such complaint. On significant risk transfers, Bailey said they are not large but growing; lessons from the crisis show some turned out not to transfer risk, the PRA approves each one and has written to banks about unfunded deals, and stress tests assume failures. Benjamin said the differences from the 2008 collateralised debt obligations are that banks are stronger, loan underwriting is stricter and these deals are bilateral relationships rather than traded, though unfunded ones create counterparty risk. On stablecoins, the cap moved from a per-account limit to an aggregate 40 billion pound limit, the backing mix changed to 70% remunerated assets and 30% unremunerated central bank reserves, issuers get Bank accounts and a repo facility, and the UK is ahead of the US, whose CLARITY Act is stuck. Blyth added that the UK's shortage of short-dated gilts to back coins differs from the US and is being discussed with the debt office, and, in answer to John Glen's question about community banks losing deposits to crypto, Bailey said Basel's strict crypto rules limit banks' holdings, and some US crypto firms have obtained banking licences, which has not happened in the UK. Kroszner noted that the 30% direct access to the Bank lets it monitor outflows tick by tick and guarantees a cushion in a run. Bailey drew the line between stablecoins, which must meet the test of money, and crypto, which has no assured value; links between crypto and the core financial system are not deep. The chair closed by summarising a session on whether the capital rules strike the right balance, on the pace of AI-related risks and how hard it is for supervisors and companies to keep pace, and on whether heavy AI investment affects growth in other sectors.