Repo haircuts depend on dealer constraints and bargaining conditions, not only collateral risk, according to new European Central Bank research. The ECB published the working paper on October 15, using transaction-level euro-area data collected from January 2019 through June 2024.

Key Insights

  • Repo haircuts in bilateral dealer-to-client trades were frequently zero and sometimes carried the opposite sign from textbook expectations.
  • Binding dealer leverage constraints raised haircuts in collateral-driven repos after the June 2021 requirement took effect.
  • Constrained dealers showed greater repo-rate volatility and weaker pass-through of ECB policy-rate changes.

Repo haircuts reflect three market frictions

Researchers Benedikt Ballensiefen, Jasper Knyphausen and Benoît Nguyen identified three forces shaping bilateral repo terms. These were dealer balance-sheet constraints, the convenience value of scarce collateral and clients’ ability to trade with alternative dealers.

The study used the ECB’s Money Market Statistical Reporting database, covering large euro-area dealer banks. It tracked counterparties, collateral, transaction volume, maturity, repo rates and haircuts across the 2019–2024 sample.

Dealer leverage changes repo haircuts

The Basel III leverage-ratio requirement became binding in June 2021. Dealers closer to their regulatory minimum subsequently charged higher haircuts in collateral-driven transactions, where receiving cash expands the balance sheet.

The same effect did not appear in funding-driven repos, which affect balance sheets differently. Scarce government bonds lowered haircuts when dealers sought specific collateral but raised them when dealers could reuse the securities they received.

Why the findings matter for markets

Repo markets distribute short-term funding and support the movement of government-bond collateral. The paper found that constrained dealers passed ECB rate changes through less completely, suggesting that regulatory costs can influence monetary-policy transmission.

The result adds context to funding benchmarks such as the SONIA market and ongoing changes to U.K. clearing collateral rules. It also helps investors assess why policy-rate changes, including those considered in the RBA inflation outlook, may reach market borrowers unevenly.

The authors cautioned that the paper does not represent the ECB’s official position. Its results describe the observed euro-area sample rather than a current estimate for every repo market.

Source: ECB Working Paper No. 3301, Stop believing in haircuts—at least the way you think about them, published October 15, 2026.

Sharron Kendi is a seasoned crypto market analyst and writer with over three years of experience decoding blockchain trends, price movements, and market dynamics. She holds a Bachelor’s Degree in Commerce (Finance) from Kenyatta University, blending a solid academic foundation with a sharp eye for technical analysis and a deep understanding of on-chain data. Her work delivers clear, data-driven insights that empower investors to navigate the fast-evolving digital asset space with confidence.