The ECB Is Asking the Right Question About UCITS Leverage. But Looking in the Wrong Place.

The ECB's November 2025 Financial Stability Review proposes new leverage limits on UCITS hedge funds. The analytical framework it uses to justify them conflates fundamentally different types of risk. With the European Commission's UCITS consultation approaching, getting the framework right is no longer an academic question.

Why This Matters Now

The ECB's November 2025 analysis was not an isolated piece of work. It sits within a chain of regulatory activity that is moving steadily from observation toward binding rules. ESMA published its first dedicated analysis of risks in UCITS using the absolute Value-at-Risk approach in April 2025, identifying a subset of funds with very high gross leverage. The Financial Stability Board finalised its recommendations on leverage in non-bank financial intermediation in July 2025, with implementation work and a data task force now running into 2026. And the European Commission is expected to launch its consultation on the UCITS framework during 2026, following ESMA's technical advice on the Eligible Assets Directive.

In other words, the gross-notional framing in that ECB box is about to graduate from a financial stability review into part of the evidentiary basis for binding regulation. Once a metric is embedded in a consultation, it is far harder to dislodge. That is why the framework is worth scrutinising now, while the analytical foundations are still being laid, rather than after the rules are drafted.

The Concern Is Legitimate. The Metric Is Not.

The growth of synthetic leverage within UCITS hedge fund structures, the potential for procyclical redemption behaviour to amplify market stress, and the particular risks that arise when retail investors access daily-dealing funds with complex underlying exposures — these are all legitimate macroprudential concerns. The ECB is right to focus on them. March 2020 demonstrated that liquidity mismatches in open-ended funds can transmit stress rapidly and force central bank intervention on a scale few anticipated.

What the ECB's analysis gets wrong is the instrument used to measure the risk. The November 2025 Financial Stability Review reports that UCITS hedge funds pursuing global macro strategies carry gross notional derivatives exposure of up to 12 times equity, presenting this as evidence of elevated systemic risk warranting new regulatory powers. But the paper's own footnote acknowledges that gross derivatives exposure 'may overestimate leverage, as this does not take hedging and netting effects into account.'

A fund running 15x gross notional exposure in Euribor or SOFR futures — short-term interest rate contracts settling daily on a central exchange — carries an economic sensitivity to market moves that is orders of magnitude smaller than a fund running 1.5x leverage in illiquid OTC credit instruments. The gross notional metric, borrowed from Basel III's treatment of bank derivatives exposures, was considered blunt even in that context. Applied to managed futures strategies trading listed contracts, it produces figures that are large, alarming-looking, and largely meaningless as indicators of financial stability risk.

Table 1 below makes the distinction concrete. Three categories of UCITS hedge fund strategy, three categorically different risk profiles — treated identically by the ECB's framework.

Table 1: Leverage, instrument liquidity and historical risk profile across UCITS hedge fund strategy types

Source: Resonanz Capital.

The column that matters most is the last one. It is not theoretical.

The ECB‘s Own Data Contains A Critical Admission

The empirical heart of the ECB's analysis shows that leveraged UCITS hedge funds experience larger outflows during high-stress periods (defined as months when the VIX exceeds its 90th percentile). This is a genuine finding on a panel of 457 funds over six years. It should not be dismissed.

But read the footnote attached to that chart. The leverage proxy used in the stress analysis is defined as 'the gross notional value of derivatives excluding interest rate and FX contracts, which are extensively used for hedging.'

The ECB excludes interest rate and FX derivatives from its own stress leverage measure — the same instruments that dominate the portfolios of the global macro and CTA funds it flags as highly leveraged in its headline charts.

This is the internal contradiction at the centre of the ECB's argument. The ECB uses one leverage metric to generate alarming headline figures for global macro strategies (12x gross notional). It then uses a different leverage metric — one that explicitly strips out the instruments those strategies primarily trade — to demonstrate that leveraged UCITS funds face larger stress outflows. The policy conclusion that follows, proposing blanket leverage limits on all highly leveraged UCITS hedge funds, would fall most heavily on the strategies that the ECB's own empirical stress analysis does not actually implicate.

The funds driving the stress outflow finding in panel b are most likely those leveraged through other derivatives categories: equity options, complex overlay structures, or credit-linked instruments with non-linear payoffs. A proportionate regulatory response would target those structures specifically — not impose uniform leverage caps across a category as diverse as UCITS hedge funds.

The historical record settles the question

Theoretical arguments about leverage metrics can run in both directions. The historical record of UCITS fund liquidity failures is harder to argue with. Every significant documented case shares the same root cause: illiquid underlying assets wrapped in a daily-dealing structure. Not one involves a CTA or listed-derivatives global macro strategy.

Every UCITS fund that has gated investors, frozen redemptions or required regulatory intervention in the past decade held assets that could not be sold at speed when investors wanted to leave. Exchange-traded futures are generally among the most liquid instruments available to fund managers — with transparent pricing, central clearing and established market-making depth — though liquidity can still deteriorate under extreme conditions. That asymmetry is not cosmetic. It is the core of the argument.

H2O Asset Management — 2019 to 2020

H2O, then managing over €30 billion across French-domiciled UCITS funds, invested heavily between 2015 and 2019 in illiquid private bonds linked to Lars Windhorst's Tennor Group — holding these positions inside funds offering daily redemptions. When the Financial Times exposed the exposure in June 2019, €8 billion — roughly 30% of total AUM — left in just over a week. By August 2020, the AMF required the suspension of three funds; €1.6 billion was frozen. The FCA's subsequent investigation confirmed H2O had failed to conduct adequate due diligence and lacked proper governance. H2O paid €250 million in settlement. The AMF fined its co-founder Bruno Crastes €15 million and imposed a five-year management ban. The causal mechanism was straightforward: illiquid OTC private bonds in a daily-dealing UCITS wrapper.

GAM Absolute Return Bond Fund — 2018

In July 2018, GAM suspended investment director Tim Haywood after an internal whistleblower investigation found his Luxembourg and Ireland-domiciled UCITS Absolute Return Bond Fund portfolios contained illiquid debt securities without proper due diligence. The funds — managing approximately CHF 7.3 billion — received redemption requests exceeding 10% of assets and were suspended, then placed into liquidation. The UCITS-domiciled funds ultimately returned an average of 100.5% of assets to investors after a ten-month orderly liquidation process. The Cayman master fund returned significantly less. The crisis was structural rather than performance-driven. The FCA fined GAM £9.1 million for conflicts of interest. Again: illiquid fixed income instruments in a daily-dealing wrapper.

Woodford Equity Income Fund — 2019

The Woodford Equity Income Fund was an FCA-authorised UCITS vehicle. Persistent underperformance drove steady redemptions, forcing the sale of liquid large-cap positions and leaving the portfolio increasingly concentrated in illiquid unquoted stakes. Woodford's attempt to stay within the regulatory 10% unquoted limit by listing holdings on the Guernsey stock exchange — where they were rarely if ever traded — was later characterised by the FCA's then-chief executive as exploiting a regulatory loophole. When Kent County Council submitted a £250 million redemption request in June 2019, the fund suspended dealing and was subsequently wound down. Investors could not access their capital for months. Root cause: illiquid unquoted equity in a daily-dealing UCITS.

Nordic High-Yield Bond Funds — March 2020

The March 2020 market dislocation produced a wave of UCITS fund suspensions that illustrates the same mechanism operating at systemic rather than idiosyncratic scale. On 20 March, Carnegie Fonder — Sweden's largest independent fund manager — gated 12 funds, primarily corporate bond strategies. Danske Invest, the asset management arm of Denmark's largest bank, suspended 15 funds, most in high-yield bonds. Norwegian boutique Forte Fondsforvaltning suspended its FORTE Kreditt fund on 16 March; it was liquidated in May 2020. Swedish managers Spiltan and Cicero and Denmark's Jyske also suspended funds during the same period.

Danske Invest's investment specialist said at the time: 'It is our impression that high-yield funds typically experience more frequent suspensions during extreme market conditions. In our opinion, this reflects the nature of the asset class and the market for the underlying securities.' That is a fund manager accurately diagnosing, in real time, exactly the distinction this note is making.

The scale of the broader episode is documented in the ECB's own April 2021 Macroprudential Bulletin (Grill, Molestina Vivar and Wedow): at least 215 investment funds with net assets totalling €73.4 billion suspended redemptions in March 2020. Bond funds accounted for 68 of those suspensions, representing €14.3 billion in affected assets. The primary domiciles were Denmark, Luxembourg, Sweden and the United Kingdom. The ECB's own research attributed these suspensions to liquidity mismatches in underlying assets — the same institution now proposing leverage limits on listed-derivatives funds.

CTA and Listed-Derivatives Global Macro UCITS: The Absence of Evidence

Across the documented history of UCITS fund stress episodes — spanning 2008, the 2016 Brexit referendum, the 2018 to 2019 GAM, H2O and Woodford episodes, and March 2020 — we have found no prominent documented case of a UCITS fund trading primarily in listed derivatives having to gate, suspend, or force-liquidate in a manner that caused investor harm or amplified market stress comparable to the liquidity-mismatch episodes described above. Industry analysis consistently notes that redemption gates and suspensions are highly unusual for strategies built on centrally cleared, exchange-traded instruments. That pattern is informative. It is a distinction the ECB's framework struggles to capture, because its leverage metric is not calibrated to distinguish by instrument type.

This is not to argue that listed-derivatives strategies are risk-free. They can generate margin liquidity demands, contribute to crowded positioning, and participate in procyclical flows. The point is narrower: those risks are not well captured by gross notional exposure, and they are categorically different from the redemption-gating risk created by illiquid assets inside daily-dealing vehicles. The former requires discipline around collateral, margin buffers and position sizing. The latter creates a structural mismatch that no amount of risk management can fully resolve once investors want to exit at scale.

On Procyclicality: A Proportionality Problem

The ECB's finding that UCITS hedge fund flows are procyclical — positively correlated with past returns — is empirically solid and consistent with the broader literature. The concern is legitimate. Two qualifications are important.

First, procyclical capital in European rates markets is not concentrated in UCITS CTAs. Risk parity strategies mechanically sell duration when volatility rises. Volatility-targeting overlays on pension books do the same. Structured product dealers delta-hedging barrier options can generate significant one-way flow in rates within hours. Discretionary macro managers operate stop-loss discipline that is less systematic but equally directional. None of these actor categories feature in the ECB's analysis. The open interest held by those participants in Euribor and Bund futures dwarfs the UCITS CTA footprint by a substantial multiple. An argument focused on UCITS CTAs as a procyclical amplifier requires a proportionality case the paper does not make.

Second, the ECB's own April 2021 Macroprudential Bulletin found that during March 2020, less regulated non-UCITS funds engaged in significantly more procyclical selling and cash hoarding than their UCITS counterparts. That finding — from the same institution — cuts against the narrative that UCITS-regulated vehicles are a primary source of procyclical amplification.

A Better Framework is Available

The ECB's goal — ensuring that UCITS hedge funds combining synthetic leverage with daily-dealing structures and retail investor access do not pose disproportionate financial stability risks — is the right goal. The disagreement is about how to pursue it.

Three improvements would make the framework meaningfully more precise.

Classify by instrument liquidity, not notional size

The primary driver of UCITS liquidity risk is not the size of the leverage but the mismatch between the liquidity of underlying instruments and the redemption terms offered to investors. Regulatory frameworks should differentiate between centrally cleared listed derivatives — where positions can be closed at exchange prices within minutes — and OTC instruments where secondary market depth is limited and valuation uncertain under stress. A fund holding 15x notional in Euribor futures faces categorically different liquidity risk from a fund holding 3x in illiquid OTC credit. Treating them identically is not conservative regulation; it is imprecise regulation.

Replace gross notional with risk-adjusted reporting

The commitment approach — which the ECB itself recommends all UCITS hedge funds should be required to use — converts derivatives exposures into cash-equivalent positions after netting and collateral, capping global exposure at 100% of net asset value. This is a meaningfully more conservative and economically informative metric than gross notional. For rates-sensitive instruments, DV01-weighted notional — the sensitivity to a one-basis-point rate move — provides an even more granular view. Mandatory commitment-approach reporting for all UCITS hedge funds is a sensible and straightforward improvement that would enable better cross-fund comparisons and cleaner identification of genuine leverage concentration.

Target stress-testing at the liquidity mismatch, not the headline number

The ECB's proposed discretionary power to impose leverage limits on UCITS hedge funds that pose financial stability risks is appropriate as a backstop tool — but only if exercised with instrument-level precision. Blanket limits calibrated to gross notional exposure would constrain exchange-traded futures funds that have never gated an investor, while leaving OTC credit-oriented structures — the actual source of documented failures — insufficiently addressed. Granular liquidity stress testing, modelling simultaneous redemption shocks and margin calls across specific instrument types, would provide more actionable risk intelligence than any leverage cap based on notional exposure.

Conclusion

The ECB is right to pay attention to leverage and liquidity mismatch in UCITS hedge funds. The NBFI sector has grown significantly, retail access to complex strategies has expanded, and the events of March 2020 showed that fund-level stress can become market-level stress with speed that surprises even experienced observers.

But the risk is not that the ECB acts on UCITS leverage. The risk is that it acts on the wrong leverage, in the wrong funds, and leaves the actual sources of liquidity mismatch — illiquid OTC instruments wrapped in daily-dealing structures — less scrutinised than they should be.

The strategies that have gated investors, frozen redemptions and required regulatory intervention share one characteristic: they held assets that could not be sold at speed when investors wanted to leave. H2O could not sell Windhorst bonds. GAM could not sell Haywood's illiquid debt at scale. Woodford could not sell unquoted stakes. Nordic high-yield funds could not sell corporate bonds into a frozen market. In every case, the structure had promised something — daily liquidity — that the underlying portfolio could not support.

Listed-derivatives strategies have not created that same pattern of harm. The instruments are generally liquid by design and by regulatory structure, supported by central clearing, daily margining and established market-making depth. A regulatory framework that cannot see this distinction will not improve financial stability. It will redistribute scrutiny away from where the risk has historically lived.

We welcome engagement with these arguments from regulators, industry peers and allocators. With the European Commission's UCITS consultation expected during 2026, the question of how to supervise leverage in these structures is about to move from analysis to rules. Getting the analytical framework right is the necessary first step — and the window to influence it is open now.

Key Sources

ECB Financial Stability Review, November 2025 — 'Procyclicality and leverage of euro area UCITS hedge funds: an unhealthy mix.' Baudino, Schwartz Blicke and Habib. ecb.europa.eu/press/financial-stability-publications/fsr/html/ecb.fsr202511~263b5810d4.en.html

ESMA, April 2025 — 'ESMA assesses the risks posed by the use of leverage in the fund sector.' esma.europa.eu/press-news/esma-news/esma-assesses-risks-posed-use-leverage-fund-sector

Financial Stability Board, July 2025 — 'Leverage in Non-Bank Financial Intermediation: Final Report.' fsb.org/2025/07/leverage-in-non-bank-financial-intermediation

ECB Macroprudential Bulletin, April 2021 — 'The suspensions of redemptions during the COVID-19 crisis: a case for pre-emptive liquidity measures?' Grill, Molestina Vivar and Wedow. ecb.europa.eu/pub/financial-stability/macroprudential-bulletin/html/ecb.mpbu202104_3~a7ddbf0d16.en.html

FCA Final Notice: H2O AM LLP, August 2024 — Reference 529105. fca.org.uk/publication/final-notices/h2o-am-llp-2024.pdf

AMF Enforcement Decision: H2O Asset Management, January 2024 — Seven French-domiciled UCITS funds; €75 million fine. amf-france.org

Financial Times, 22 March 2020 — 'Nordic high-yield bond funds block withdrawals.' Carnegie Fonder, Danske Invest, Forte Kreditt, Spiltan and Jyske suspensions. ft.com

FCA Policy Statement PS19/24, September 2019 — Rules for open-ended funds investing in illiquid assets; Woodford Equity Income Fund. fca.org.uk/publications/policy-statements/ps19-24-illiquid-assets-open-ended-funds

FCA Decision Notice: GAM Investments and Tim Haywood, December 2021 — GAM fined £9.1 million; Haywood fined £230,037. fca.org.uk/publication/decision-notices/gam-international-management-limited-2021.pdf

DNB Asset Management, March 2021 — 'Nordic High Yield: Roller coaster 2020.' Analysis of Swedish credit fund suspensions and NOK volatility dynamics.