The Repo Market Has Vulnerabilities. Mutual Funds Aren’t One of Them
The repo market is essential to government bond markets and the broader financial system. It also finances leveraged trading strategies that are overwhelmingly undertaken by hedge funds, not regulated mutual funds. Yet recent concerns expressed by policymakers, including the Financial Stability Board and the European Central Bank[1], increasingly draw regulated funds into the scope of the debate simply because they appear as counterparties in repo transactions. Acting as a counterparty does not make a mutual fund the source of leverage or the driver of repo‑financed strategies. What matters is not who participates in repo transactions, but how vulnerabilities are generated.
The real vulnerabilities lie in structural leverage, heavy reliance on short-term funding, and concentrated intermediation. The latest report on government bond-backed repo markets, covering roughly $16 trillion in activity, illustrates exactly how those vulnerabilities arise. It points to dependence on overnight funding, concentrated clearing and dealer capacity, and leverage embedded in financing channels as key amplifiers of stress. About half of repo transactions are financed overnight, meaning that funding can disappear precisely when markets come under strain. These are structural vulnerabilities. They are not created by the presence of regulated mutual funds on the other side of a trade.
When repo markets seize up, stress spreads quickly, but misdirecting scrutiny toward regulated funds will not address these mechanisms. Instead, it risks weakening market liquidity while leaving the true vulnerabilities intact.
The Risk Is Structural Leverage, Not Regulated Funds
Regulated mutual funds are not drivers of repo-induced leverage. Their balance sheets operate under strict leverage limits, liquidity requirements, and diversification rules that sharply constrain maturity transformation and balance sheet expansion. They do not rely on unstable short-term funding in the way highly leveraged trading strategies do.
In repo markets, regulated funds typically act as counterparties and liquidity providers, not as sources of fragility. Conflating constrained, regulated fund activity with leveraged financing strategies risks obscuring the real problem and targeting the wrong mechanisms altogether.
Relative-Value Trading Is Not the Vulnerability
That same misplaced focus is often applied to relative-value trades, including cash-futures arbitrage. These trades are sometimes cited as evidence of speculative excess. In practice, they serve an important market function by aligning prices between cash and derivatives markets and supporting liquidity in government bond markets.
The risk does not arise from price-alignment strategies themselves. It arises from how those strategies are financed—through significant leverage, short-term funding, and reliance on concentrated intermediaries. Targeting regulated funds does nothing to address those financing mechanics.
Focus on Activities, Not Labels
Effective policy should target the activities that create systemic risk, including excessive leverage, fragile short-term funding, and concentrated clearing and intermediation, not institutions that are already tightly regulated and structurally constrained.
Misdiagnosis carries consequences. Broad or misdirected measures could reduce liquidity in government bond markets, impair price discovery, and weaken resilience while leaving the true drivers of instability intact. If policymakers misidentify how systemic risk is transmitted, they risk directing regulatory tools at the wrong targets and constraining sovereign market liquidity without addressing the mechanisms that generate instability. The priority should be better data, sharper monitoring of leverage and funding pressures, and targeted responses to structural weaknesses.
Getting this right strengthens market resilience. Getting it wrong risks undermining one of the most critical funding markets in the global financial system without solving the problem.
Notes
[1] See ECB (2024): “Financial stability risks from basis trades in the US Treasury and euro area government bond markets”, Financial Stability Review, May 2024;
BIS (2025): “Sizing up hedge funds' relative value trades in US Treasuries and interest rate swaps”, BIS Quarterly Review, December 2025;
FSB (2025): “FSB Workplan to Address Nonbank Data Challenges”, which announces work on leveraged trading strategies in core financial markets.