Hedge funds hold $2 trillion in Treasuries as Dallas Fed flags basis trade alternatives
In brief
- OFR estimates hedge funds held $2 trillion in cash Treasuries at end-2025, about 7% of marketable debt.
- Basis trade position rose from an estimated $213 billion to $832 billion, January 2023 to September 2025.
- Dallas Fed research found alternatives to the cash-futures basis trade had become more attractive.
- CryptoSlate's analysis says other investors may need to absorb bonds, potentially at higher yields.
How the basis trade works
The mechanics are fairly simple. When Treasury futures get expensive relative to the bonds that can be delivered against them, hedge funds buy the cheaper securities, sell futures and try to collect the difference. It's designed to offset much of the interest-rate exposure (it isn't a view on whether US debt is worth owning). Funds typically finance the cash bonds with repo, an arrangement that resembles a collateralized loan.
That financing is where things get fragile. In a hypothetical example, a $100 million Treasury position with a 2% repo haircut needs $2 million of the fund's own money toward the purchase, and if the haircut rose to 4%, the fund would have to supply another $2 million, pledge collateral or sell bonds. Losses on the futures leg can also require immediate margin payments before gains on the bonds become usable cash.
The numbers behind the trade
Using the Federal Reserve's monthly Form PF-based series, the estimated cash-futures basis position rose from $213 billion in January 2023 to $832 billion in September 2025. The estimated swap-spread position went from $42 billion to $305 billion over the same stretch. Those strategies accounted for roughly $1.14 trillion, or 47% of the $2.4 trillion in total long Treasury exposure reported for large hedge funds in September 2025.
These are estimates. They cover different measures and observation dates, so they can't simply be added together. Hedge-fund balance sheets also showed expanding gross assets and broker financing in the second quarter of 2026.
Why fewer bonds matters
Dallas Federal Reserve research published Oct. 16 found that reallocating a fixed amount of risk capital to those alternatives could produce a much smaller Treasury position.
The bonds still have to land somewhere.
In CryptoSlate's analysis, Andjela Radmilac said the government would need other investors to buy the securities hedge funds no longer want to finance, potentially at higher yields. She also separated managers choosing to deploy borrowed money elsewhere from lenders or clearing arrangements demanding cash. Both can affect Treasury prices and dollar funding, but in her view only the second necessarily involves a scramble for liquidity that could spill into Bitcoin and other assets.
Frequently asked questions
What is the Treasury cash-futures basis trade?
When Treasury futures become expensive relative to the bonds deliverable against them, hedge funds buy the cheaper bonds, sell futures and try to collect the difference. The trade is designed to offset much of the interest-rate exposure rather than bet on US debt. Funds typically finance the bonds with repo, which resembles a collateralized loan.
How big has the hedge fund basis trade become?
Using the Federal Reserve's Form PF-based series, the estimated cash-futures basis position rose from $213 billion in January 2023 to $832 billion in September 2025. The estimated swap-spread position grew from $42 billion to $305 billion. These are estimates covering different measures and dates.
Why could hedge funds end up holding fewer Treasuries?
Dallas Fed research published Oct. 16 found alternatives to the basis trade had become more attractive. Reallocating a fixed amount of risk capital to them could produce a much smaller Treasury position. CryptoSlate's analysis said other investors would then need to buy those bonds, potentially at higher yields.
