Bank of England Eases Capital Rules

The Bank of England has proposed easing parts of its bank capital framework even as it warns that risks to financial stability are becoming more pronounced. The move centers on the leverage ratio, a simple capital constraint that limits banks’ total assets relative to their capital without adjusting for the perceived riskiness of those assets.

The Bank of England targets the leverage ratio

Bloomberg reported that the Bank of England is proposing to ease some bank capital rules despite mounting risks across the financial system. The focus is the leverage ratio, a non-risk-weighted measure that was introduced after the global financial crisis as a backstop to more complex capital models.

The Financial Times reported that the Financial Policy Committee is considering an adjustment that could reduce the leverage-ratio burden by about 0.2 percentage points of UK bank assets. The stated aim is to improve banks’ ability to lend and to support the functioning of core markets during stress. Some committee members, however, are concerned that looser rules could encourage more leverage in market-based finance.

The leverage ratio is meant to prevent banks from expanding their balance sheets too aggressively simply because their assets are judged to be low-risk under internal or regulatory models. In the UK, large banks and building societies are subject to the framework when they exceed £50 billion of retail deposits or £10 billion of non-UK assets; the minimum requirement is 3.25%, with buffers on top.

Why the rule became a problem for banks

The central bank had already acknowledged in its December capital review that the leverage framework was becoming more binding than originally intended. When the UK introduced the rule in 2015, risk-weighted requirements were expected to be the main constraint for most large banks most of the time. As banks’ average risk weights declined, the leverage ratio became binding, or close to binding, for more lenders. Three of the seven major UK banks now have leverage-based minimum requirements and buffers as their binding Tier 1 capital constraint at consolidated level.

In April 2026, the regulator gathered banks, building societies, investors, rating agencies, analysts, academics and public authorities to discuss the capital framework. The agenda covered buffer usability, the functioning of the leverage ratio and complexity in requirements linked to domestic exposures. Participants disagreed on the balance of risks: some argued that heightened macroeconomic and geopolitical uncertainty supported maintaining or increasing capital requirements, while others said weak credit growth since the crisis had weighed on productivity.

PwC noted in its review that UK capital requirements are broadly comparable with the euro area and lower than US requirements on a like-for-like basis, but domestically focused UK banks face relatively high constraints from leverage buffers. That matters most for lenders focused on retail customers and small and medium-sized companies.

Easing comes as market risks rise

The latest Financial Stability Report was published on July 7, 2026. In its summary, the Financial Policy Committee said vulnerabilities in risky asset valuations, sovereign debt markets, risky credit markets and private credit remain, with some becoming more pronounced since the December 2025 report. It also highlighted a substantial increase in the use of leverage in equity markets.

WSJ Pro reported that the UK central bank sees increased borrowing by equity investors as a threat that could accelerate a fall in share prices. A disappointment in expected revenues from artificial intelligence-related companies could force leveraged investors to sell assets quickly, spreading stress to other markets, including government bonds.

That makes the timing sensitive. The proposed easing applies to banks, but recent episodes of market stress have often traveled through non-bank finance: hedge funds, repo markets, derivatives and forced position unwinds. For financial stability, bank resilience and market leverage cannot be judged in isolation.

Artificial intelligence becomes a stability issue

The July report also says rapid advances in frontier artificial intelligence have increased financial-stability risks linked to cyber and operational resilience. This is separate from the valuation debate around technology stocks. The practical risk is that more capable models could accelerate vulnerability discovery, automate attacks and increase pressure on banks, exchanges, payment systems and financial infrastructure providers.

For banks, this adds a new layer to the capital debate. The regulator wants a more efficient and proportionate framework. At the same time, the list of possible shocks is expanding. Interest rates, sovereign debt, private credit and geopolitics are now joined by faster-moving cyber and operational risks.

Basel 3.1 and the UK’s competitiveness agenda

The UK is also preparing to implement Basel 3.1, the post-crisis international banking package designed to refine the calculation of risk and capital. The Prudential Regulation Authority delayed UK implementation to January 1, 2027, citing uncertainty over adoption in other major jurisdictions and considerations around competitiveness and growth.

The internal model approach for market risk will take effect later, on January 1, 2028. The regulator says the final rules are designed to address weaknesses revealed by the financial crisis, including inadequate Pillar 1 capital requirements in some areas and excessive variability in risk-weight calculations.

For London, this is also a competitiveness issue. Since Brexit, financial regulation has become part of the contest for capital, trading activity and headquarters. Stricter capital rules raise resilience but can reduce returns on some activities. Looser rules may support lending and market-making, but they also reduce the margin for error when shocks hit.

The gilt market may be the immediate test

One practical consequence of the review could be felt in the UK government bond market, known as the gilt market. Banks and dealers help keep that market liquid by buying, selling and temporarily holding bonds on their balance sheets. If the leverage ratio is too restrictive, banks may be less willing to warehouse those positions, particularly during volatility.

Economic Times reported that changes to leverage rules could support demand for gilts and potentially lower public borrowing costs by more than £1 billion a year, while former regulators have warned that loosening safeguards could raise systemic risk.

The credit impact is not automatic. Lower capital pressure may give banks more room to lend, but loan growth also depends on interest rates, borrower quality, property prices, business confidence and the economic outlook. The April evidence session showed that views remain divided: some participants saw competitive mortgage markets and strong corporate lending growth, while others argued that credit growth had been weak relative to GDP since the crisis.

The Bank of England is aiming for recalibration rather than a rollback of post-crisis regulation. Still, the timing is uncomfortable: the same report that supports capital-framework adjustments also warns about expensive assets, higher leverage and new artificial intelligence-related threats. As International Investment experts report, the central question is not whether easing gives banks more room to operate, but whether the regulator can keep the line between efficiency and premature weakening of safeguards. If the changes improve gilt-market liquidity without encouraging hidden leverage, the reform will look pragmatic. If banks and funds use the opening to increase risk before the next correction, the UK may rediscover an old problem: capital looks adequate until markets suddenly reprice risk.