Zero haircuts and non-bank leverage heighten global repo market risks

Global government bond repo markets reached 16 trillion dollars by late 2024, with the United States accounting for nearly 60 percent of total volume.

While short overnight maturities and high-quality sovereign collateral allow dealers to intermediate cash efficiently, these mechanics generate structural vulnerabilities.

Data shows that 74 percent of non-centrally cleared bilateral Treasury repos transact at zero haircuts, enabling hedge funds to build large leveraged positions via cash-futures basis trades.

Furthermore, primary dealers re-lend up to 85 percent of received collateral.

When volatility spikes, interconnections between dealers, money market funds, and levered non-banks cause rapid margin calls, forced liquidations, and liquidity contagion.

Regulatory frameworks like Basel III leverage and liquidity ratios have enhanced bank resilience, but they create distinct market frictions.

Constraints under the Supplementary Leverage Ratio limit dealer balance sheet expansion during stress, prompting window-dressing around reporting dates.

While central clearing mitigates counterparty risk and improves netting efficiency, it concentrates systemic risk within central counterparties and raises margin demands.

Central bank asset purchases can also cause collateral scarcity by absorbing government bonds.