Private markets meet their first true stress test: inside the Bank of England’s second SWES

On 19 June 2026, the Bank of England moved its scrutiny of private markets from theory to practice. For years, regulators have described private credit and private equity as fast-growing, opaque and increasingly relevant to financial stability. The Bank has now done something more concrete: it has handed 46 of the largest participants in the market a five-year recession and asked them to show their working.

This is the second System-Wide Exploratory Scenario (SWES), and the first directed at private markets. It deserves the attention of every sponsor, lender, institutional investor and adviser operating in the space, not because it carries capital consequences, but because of what it signals about where supervision is heading.

What the Bank of England has done

In December 2025 the Bank launched its second SWES, focused on the private markets ecosystem. On 19 June 2026 it began the scenario phase, sending participants a hypothetical, severe but plausible global recession running over five years and comprising roughly a broad set of quantitative variable paths alongside a supporting narrative.

The scenario is deliberately demanding, calibrated as a tail-risk outcome broadly consistent with the Bank’s 2025 Bank Capital Stress Test. In year one, asset prices fall sharply and UK CPI inflation peaks at 7%. In year two, UK GDP contracts by 4%, Bank Rate rises to 7%, the FTSE All-Share falls 35% and European leveraged-loan spreads widen by 390 basis points. Across years three to five, the recovery is slow, with unemployment peaking at 7.5%.

The 46 participants span the full ecosystem: institutional investors such as insurers and pension funds; alternative asset managers running private equity, private credit and CLO strategies; banks providing leverage to sponsor-backed businesses; and asset managers active in leveraged loans and high-yield bonds. Participation is voluntary, and the exercise runs under the Financial Policy Committee and Prudential Regulation Committee, supported by the PRA, FCA and The Pensions Regulator.

Why is this exercise different

Conventional stress tests examine institutions one at a time and ask whether each holds enough capital. The SWES asks a harder question: how do firms behave when stressed, and how do those behaviours interact across the system to amplify a shock.

That distinction matters. It is exploratory, not a pass-or-fail test, and it will not set capital requirements. Its purpose is to map the feedback loops that a single-firm exercise cannot see: the moment when many participants reach for the same exit at the same time. To capture this, the exercise runs in two rounds, with firms revising their responses after seeing how others behaved in aggregate.

It is also notable for who is in scope. Much of the private markets ecosystem sits beyond the Bank’s direct prudential remit, which is precisely why participation is voluntary and why the collaborative design is significant. Regulators are extending stress-testing discipline to parts of the financial system they do not directly regulate.

What the scenario actually tests

Strip away the headline numbers and three pressure points come into focus.

The first is valuation. Private assets are marked infrequently, so the scenario probes how those valuations respond when listed equivalents are falling sharply, and whether reported marks lag reality in ways that store up risk.

The second is liquidity and refinancing. The exercise examines how funds manage redemptions, margin and the need to refinance borrowing when conditions tighten, and whether the closed-ended structures that make private capital patient also leave it exposed when financing must be rolled.

The third is interconnection. The Bank wants to understand how correlated strategies, shared counterparties and concentrated exposures transmit stress between private markets, banks and institutional investors, and whether private credit absorbs a shock or passes it on.

In a real downturn, these pressure points surface as live transactions: waivers, amend-and-extend processes, valuation disputes, intercreditor negotiations and, in the harder cases, restructurings. The SWES is, in effect, a rehearsal of that machinery.

What it means for private markets participants

The immediate message for the market is that private credit and private equity are now treated as systemically relevant infrastructure rather than a specialist niche. The reputational and commercial advantage will sit with firms that can evidence genuine resilience: credible borrower-level stress-testing, realistic liquidity planning and workout processes that function under pressure rather than on paper.

There is a quieter operational point as well. A disorderly response to stress is rarely a failure of strategy alone; it is often a failure of execution. Consents that cannot be gathered quickly, waterfalls that are contested, escrow and security arrangements that were never built for a contested scenario, all turn a difficult situation into a damaging one. The participants who weather a downturn best tend to be those whose deal infrastructure already treats stress as a live possibility, with documentation, agency and escrow arrangements that hold up when the relationship between lenders, sponsors and investors comes under strain.

For cross-border structures the point sharpens further, as the same transaction may need to satisfy UK and European expectations at once. Robust, neutral transaction infrastructure is not what causes a deal to succeed in good times, but it is frequently what determines how cleanly it behaves in bad ones.

What to watch next

The findings will arrive in stages. The Bank might share insights from its initial information-gathering in its July Financial Stability Report, with interim findings from Round 1 later in 2026 and a final report in 2027. It has also committed to sharing aggregate findings with other central banks and the Financial Stability Board.

That international dimension is the part to watch. The SWES is being studied closely as a potential template for how regulators elsewhere might approach a sector that has grown faster than the tools to monitor it. The scenario itself is hypothetical and not a forecast. The supervisory direction it represents is not.

For those building and financing transactions in private markets, the sensible response is neither alarm nor indifference. It is to treat the discipline the Bank is now formalising, modelling stress, planning for illiquidity and preparing for contested workouts, as a standing feature of how deals are structured and administered, rather than a reaction to the next downturn.