Bank of England Takes More Complex Credit as Cash Collateral
Level C assets pledged through the central bank’s six-month repo facility have more than doubled in a year as quantitative tightening drains reserves.
British banks are pledging substantially more complex and less liquid credit assets to obtain six-month cash from the Bank of England, an intended consequence of the central bank's transition from abundant reserves toward a demand-driven liquidity framework. Reuters calculated that the Bank now holds about £17.8 billion of Level C collateral through its Indexed Long-Term Repo facility, more than double the £8.7 billion recorded a year earlier and far above the less than £1 billion seen in mid-2024.
At the August 18 auction, banks pledged £1.9 billion of the highest-risk collateral category, the largest weekly amount since March 2020 and three times the previous week's level. Level C assets have represented roughly one-fifth to one-quarter of accepted collateral over the past year. Their absolute amount has risen as banks use the facility more heavily.
This is not evidence of an emergency cash shortage. The ILTR is a routine facility, and the Bank of England has deliberately encouraged banks to obtain reserves against a broad pool of collateral as quantitative tightening reduces the cash created by earlier asset purchases. The change nevertheless shifts more liquidity provision onto assets that can be difficult to value or sell during stress.
What sits inside Level C
The Bank accepts securitizations and loan-backed instruments that package payments from mortgages, store cards, vehicle leases and small-business lending. Reuters' review identified securities connected to buy-to-let mortgages, subprime credit-card balances and equipment leases with large final payments. Some securities on the eligible list have been downgraded.
Eligibility does not mean the Bank lends the full face value. It applies larger haircuts to riskier collateral, lending less cash against each pound of assets, and charges a higher rate. The central bank says the framework is protected by robust risk management and is reviewed continually against its risk tolerance.
The distinction between an eligible list and actual use is also important. The Bank does not disclose which individual Level C securities have been pledged in each operation. The £17.8 billion figure describes collateral held within the facility, not a public inventory of specific loans or an estimate of likely losses.
From QE reserves to repo reserves
Between 2009 and 2021, the Bank's £895 billion of quantitative easing created a large stock of central-bank reserves. Reversing that program drains reserves from the system. Commercial banks still need cash at the Bank of England to settle wholesale payments, so they increasingly obtain it through repos: the central bank lends reserves and takes securities as protection.
A broader collateral pool lets banks reserve their most liquid government bonds for markets or regulatory buffers. It can also make the monetary system more resilient by ensuring that fundamentally sound institutions can turn assets into cash without fire sales. The trade-off is moral hazard. If lenders expect privately created credit assets to be readily financeable at the central bank, they may have less incentive to maintain a deep private market or to limit risky origination.
The European Central Bank has moved in a different direction for some asset types, tightening criteria because official eligibility can increase demand for securities that may be hard to liquidate in a crisis. The contrast does not establish that one central bank is safer: the frameworks, banking systems and haircuts differ. It does show that authorities are making different choices about how much market liquidity risk they are willing to intermediate.
The risk is about incentives and opacity
Securitization was central to the 2008 crisis because loan risks were distributed through structures that could be difficult to evaluate. Today's facilities include stronger capital, liquidity and collateral controls, and the Bank is not purchasing the securities outright. Still, valuation models and haircuts can fail when correlations rise and markets freeze.
The increase deserves monitoring alongside the health of the underlying consumer and business loans. A rise caused mainly by banks optimizing collateral is different from one driven by deteriorating private-market demand. Without deal-level usage disclosure, outside investors cannot fully separate those explanations.
Why it matters
Quantitative tightening is changing not only the quantity of central-bank liquidity but also the assets used to obtain it. Britain's system is moving toward one in which banks routinely fund themselves against a wider range of private credit, placing collateral valuation and haircut policy closer to the centre of monetary operations.
For banks, the facility provides flexibility as reserves decline. For borrowers, it may keep credit flowing by making loans easier to finance. For the Bank of England and ultimately the public balance sheet, it creates exposure that must be controlled through conservative valuations and operational readiness. For investors, the Level C increase is a signal to watch rather than proof of distress.
The framework may be working exactly as designed. The policy question is whether the design can absorb a genuine credit shock without encouraging the risks it is meant to contain.