Basis Trade Fading: Liquidity Risks Loom for Long-Term U.S. Treasuries
nashnova research
Hedge funds are pulling back from the $830 billion Treasury basis trade, and Bloomberg strategist Simon White warns that a breach of the yield critical zone could turn a slow exit into a liquidity vacuum.
What exactly is the basis trade?
The basis trade — exploiting the price gap between Treasury cash bonds and futures — works because asset managers need futures to hedge duration risk. Hedge funds take the other side: short futures, buy Treasuries with repo financing, pocket the spread.
As of September 2025, the trade totals roughly $830 billion, or 3.5% of outstanding US Treasuries. This means → it is no longer a niche strategy but a load-bearing gear in the Treasury market.
For comparison, the same figure stood at just $430 billion before the 2020 liquidity crisis — nearly doubling in five years.
How important are hedge funds to the Treasury market?
Hedge-fund holdings of US Treasuries have climbed from about 4% of tradeable government debt a few years ago to nearly 9%, or roughly $2.7 trillion by end-2025.
Between 2022 and 2025, hedge funds were the second-largest buyer of Treasuries, behind only non-bank financial institutions — ahead of foreign investors, banks, and the Fed.
In plain terms = hedge funds have become one of the most critical "marginal buyers" in the Treasury market. If they step away, no other buyer class can easily fill the gap.
Banks are moving in — why is the basis trade "dead" for funds?
Regulatory shifts let banks enter the basis trade at lower funding costs, steadily compressing spreads. At current repo rates, hedge funds can no longer earn an attractive return. Some market participants have already declared the trade "dead."
Futures positioning data confirms the shift: hedge funds are trimming net futures shorts, meaning their basis-trade exposure is actively shrinking.
Asset-manager demand for long-dated futures has dipped only slightly; dealers have filled the gap. This reflects a convergence — dealers and funds now hold directionally aligned positions, not complementary ones.
Dealers stepping in — what new risk does that create?
In past crises, dealers and hedge funds sat on opposite sides, so dealers could act as a liquidity buffer. Now both face the same direction. This means → in the next stress event, no one is positioned to be the buyer of last resort.
A second constraint: dealer balance sheets are far too small to absorb the basis trade's full volume on their own. Put simply = banks pushed funds out but cannot eat the whole pie themselves.
The result is a thinner liquidity cushion and a weaker shock absorber for the Treasury market.
Yields near 5% — why is that the danger zone?
US long-term yields are already hovering around 5%. Historical data shows that once they break the 5.25%–5.50% band, the stock-bond correlation flips from negative to positive.
This means → bonds stop hedging equity losses and become a loss amplifier — stocks fall, bonds fall too, forcing investors to cut bond holdings and pushing yields even higher.
Rising yields → higher bond volatility → larger futures margin requirements → further compression of basis-trade profits → accelerated hedge-fund exit. In plain terms = this is a self-reinforcing doom loop.
What does the worst case look like?
Strategist White's core warning: if the slow hedge-fund retreat collides with yields breaching the critical threshold, the "slow walk" turns into a sprint, and the Treasury market simultaneously loses its key marginal buyer and its liquidity buffer.
The 2020 precedent is instructive: a sudden spike in futures margins triggered a cascade of basis-trade unwinds, ultimately forcing the Fed to expand its balance sheet by roughly $3 trillion to stabilize the market.
The US Treasury has already launched a buyback programme, but that may be only the first step in keeping the market functioning — not the last.
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