Hedge funds have unwound approximately 20% of their positions in the U.S. Treasury cash-futures basis trade this year, bringing total exposure down to $1.2 trillion as of Sept. 24, according to estimates from Morgan Stanley.
Key Takeaways
- Morgan Stanley estimates Treasury basis trade positions fell 20% this year to $1.2 trillion as of Sept. 24.
- Federal Reserve researchers calculated September 2025 basis trade levels at $830 billion in a June report.
- A $100 million position leveraging $95 million in repo borrowing yields 4% on $5 million equity, but a 0.2% rate spike consumes $190,000 of the $200,000 net return.
- Haircut escalations from 2% to 4% force hedge funds to instantly double required cash collateral.
How the $1.2 Trillion Basis Trade Works
The Treasury cash-futures basis trade relies on purchasing U.S. government bonds while simultaneously selling matching futures contracts to capture tiny price discrepancies. To fund these bond purchases, hedge funds rely on short-term repurchase agreements (repo), selling the bonds for cash and agreeing to repurchase them later.
Because profit margins are narrow, managers rely heavily on leverage. For instance, an illustrative $100 million position generating a 0.2% net return yields $200,000. When funded using $5 million of equity alongside $95 million in overnight repo loans, the return on equity reaches 4%. However, if borrowing costs on the $95 million rise by 0.2%, the additional annual bill equals $190,000—wiping out nearly all profits without any government default.
Margin Calls and Market Liquidity Risks
Although Morgan Stanley found no evidence of broad market distress from the recent 20% contraction, the trade carries structural vulnerability. When underlying bond prices fluctuate, funds face immediate cash demands for variation margin on short futures accounts. The Office of Financial Research notes that accounting for futures margin and delivery option valuation dictates whether strategies remain viable.
Additionally, repo lenders can tighten financing terms by increasing haircuts. A haircut increase from 2% to 4% requires funds to double their cash collateral. If multiple funds unwind positions simultaneously, forced selling can depress bond prices relative to futures. This dynamic highlights broader shifts in sovereign debt demand, such as how stablecoin issuers replace demand for US Treasuries.
Why It Matters
An orderly reduction in basis positions makes money markets less fragile, but it shifts sovereign debt ownership toward un-leveraged buyers who require higher yields. Consequently, reduced hedge fund participation could raise long-term borrowing costs for the U.S. government. Furthermore, liquidity squeezes in traditional fixed-income repo markets can quickly spill into crypto, where traders navigating leveraged positions face similar risks during major Federal Reserve macroeconomic shifts.
