Hedge Funds Shift From Treasuries To Swaps
Key Summary
Hedge funds held an estimated two trillion dollars in cash United States Treasuries at the end of 2025, largely driven by the cash-futures basis trade. Dallas Federal Reserve research shows that alternative relative-value strategies, such as swap-spread wideners, offer comparable returns while requiring significantly smaller bond allocations, threatening future government debt absorption.
Key Bullets
- Hedge funds held an estimated two trillion dollars in cash United States Treasuries at the end of 2025.
- Dallas Federal Reserve research shows alternative strategies produce much smaller Treasury positions for the same risk.
- Cash-futures basis positions and swap-spread strategies accounted for nearly half of reported long Treasury exposure.
- Washington now risks needing other investors to buy government debt as leveraged funds reduce physical bond footprints.
Precedent & Market Context
Washington remains deeply dependent on leveraged funds buying government debt. Office of Financial Research data showed funds holding two trillion dollars in cash Treasuries by the close of 2025. That volume represented roughly seven percent of marketable debt outstanding at the time. Most of that buying relied on arbitrage strategies rather than traditional long-term investing. Funds exploited small price differences between cash bonds and derivative contracts. This dynamic turned asset managers into massive buyers who cared little about the thirty-year outlook for public finances.
Main Event
Dallas Federal Reserve research published on October 16 revealed that alternatives to the cash-futures basis trade gained significant traction. Reallocating a fixed amount of risk capital to interest-rate swap strategies can produce a much smaller underlying Treasury position. Funds can maintain similar risk profiles while purchasing fewer bonds. This portfolio shift does not stem from a sudden crisis liquidation or margin panic. Instead, managers simply found that borrowed money can earn better returns elsewhere. The government now faces the prospect of other buyers needing to absorb those securities at potentially higher yields.
Analysis & Market Impact
Estimated cash-futures basis positions climbed from two hundred thirteen billion dollars in January 2023 to eight hundred thirty-two billion dollars by September 2025. Swap-spread positions concurrently expanded from forty-two billion dollars to three hundred five billion dollars. Those two strategies alone accounted for nearly half of the total long Treasury exposure reported by large funds.
Trading desks utilize repo financing to fund cash bonds with minimal capital. If a lender demands higher haircuts, funds must supply extra cash or dump assets. However, the move toward swap-spread trades changes the arithmetic entirely by demanding less physical bond collateral for the same risk tolerance.
Implications & Outlook
Swap-spread trades expose portfolios to higher dollar risk per notional dollar. A manager willing to tolerate a ten million dollar loss can support one billion dollars of Treasuries via basis trades, but only five hundred million dollars through swaps. That single adjustment removes hundreds of millions in structural bond demand. Yield changes also eroded the embedded value of cheapest-to-deliver options in Treasury futures contracts. As long-maturity yields shifted, futures became less efficient tools for relative-value positioning. Washington must now watch whether traditional asset managers step up to fill the upcoming funding void.