Bank of England Investigates Barclays Over Private Credit Capital Rules

On Monday, October 19, 2026, shares in Barclays fell 2.6% to 421.4 pence in London morning trading after reports emerged that the Bank of England's Prudential Regulation Authority (PRA) had launched an investigation into the bank's private credit accounting. The sudden sell-off erased early market gains just days ahead of the lender's third-quarter earnings report, which is scheduled for release on Thursday.[3]

The regulatory probe was triggered by an insider complaint filed earlier this year. According to the Financial Times, the whistleblower alleged that Barclays traders deliberately misrepresented the risk profile of illiquid private credit loans to artificially lower the amount of capital the bank is legally required to hold against potential market losses.[1][7]

The core of the dispute centers on the bank's aggressive use of total return swaps, a specific type of derivative contract. These financial instruments allow Barclays to finance loans for private credit funds, passing the economic performance and yield of the underlying asset to the client in exchange for a steady fee, without directly transferring ownership of the loan itself.[1][4]

To determine regulatory capital requirements, banks must divide their assets between a "trading book" and a "banking book." The trading book is strictly reserved for highly liquid, easily sellable positions and carries significantly lighter capital charges, freeing up cash for the bank to deploy elsewhere.[1][5]

The Trading Book Dispute

Conversely, the banking book holds illiquid loans that demand larger, more expensive loss-protection reserves. According to people familiar with the matter, Barclays traders allocated their total return swaps referencing private credit loans directly to the trading book, bypassing the heavier capital requirements that standard loan exposure would attract.[1][6]

The traders reportedly justified this classification by arguing that securing a matching hedge with another counterparty—a back-to-back swap arrangement—effectively neutralized the directional risk. In their view, this hedging strategy transformed the net exposure into a tradable position that belonged in the trading book.[1][4]

Regulators fundamentally challenge that logic because the underlying private credit loans remain highly illiquid regardless of the derivative wrapper. Private credit assets cannot be easily traded on open secondary markets and lack daily pricing mechanisms, meaning a sudden market downturn could leave the bank holding exposure it cannot quickly unwind or accurately value.[1][6]

The scale of the exposure makes the accounting treatment a systemic issue. People familiar with the bank's positions indicate Barclays has accumulated billions of dollars in exposure to private credit through these specific derivative structures, making it a highly profitable but capital-intensive business line if booked conservatively.[1][5]

The broader private credit sector has swelled to roughly $2 trillion globally over the last decade. As traditional syndicated bank lending retreated under post-2008 regulations, private credit funds stepped in to finance riskier corporate borrowers, relying heavily on major investment banks like Barclays for the leverage required to boost their own returns.[1][4]

Regulatory Warnings Ignored

The PRA has been actively monitoring this exact accounting maneuver across the UK banking sector. In a formal letter sent to bank finance directors last year, the regulator explicitly warned institutions against attempting to game capital rules by repackaging illiquid assets into tradeable formats without robust, verifiable supporting evidence.[1][3]

"We consider that the repackaging of illiquid assets into a tradeable format, is not, without appropriate supporting evidence, sufficient to justify regulatory capitalisation under trading book rules," the PRA wrote in its prior guidance, signaling zero tolerance for aggressive risk-weight optimization on illiquid collateral.[1][4]

Barclays issued a brief statement on Monday morning in response to the reports, noting that it "takes seriously its regulatory obligations in markets where it operates." However, the bank declined to comment further on its specific interactions with the Prudential Regulation Authority or the details of the whistleblower complaint.[3]

The investigation highlights a growing, structural tension between central banks and the financial sector over the booming alternative lending market. Supervisors across the UK, Europe, and the US have repeatedly flagged concerns that opaque valuations and hidden leverage in private credit could expose traditional lenders to severe, cascading losses during a credit cycle downturn.[1][5]

The Threat of Capital Restatement

Whistleblower-driven probes historically carry significant weight with UK supervisors, often prompting broader and deeper scrutiny than routine algorithmic anomaly detection. Precedent suggests the PRA's sequence will move from initial information requests to a formal "skilled persons review," a forensic audit process that typically stretches over several quarters.[7]

If the PRA ultimately concludes that Barclays breached capital rules, the regulator could force the bank to formally restate its risk-weighted assets. Such a restatement would directly hit the bank's core capital ratios, potentially constraining its ability to issue future dividend distributions or execute planned share buybacks.[7]

Furthermore, the regulatory scrutiny is highly unlikely to remain confined to a single institution. Because private credit exposure and total return swap financing are widespread across the UK and European banking peer set, a supervisory hardening on valuation practices at Barclays will likely force competing lenders to preemptively review and potentially reclassify their own trading book allocations.[7]

The outcome of this probe could reshape how European banks interact with the shadow banking system. If the PRA mandates that all total return swaps tied to private credit must sit in the banking book, the increased capital costs will inevitably be passed on to the private credit funds in the form of higher financing fees.[1][6]

For now, the market is pricing in the uncertainty of a protracted regulatory dialogue. Investors will be watching Barclays' Thursday earnings call closely for any preliminary provisions or management commentary regarding the PRA's review, as the bank attempts to balance its aggressive growth in private credit with the Bank of England's tightening oversight.[3][7]