Hedge funds have built a $1.2 trillion position exploiting tiny pricing gaps between Treasury bonds and futures, funded mostly with borrowed money. The trade pays only as long as cheap overnight repo financing keeps renewing, so a shrinking total alone cannot show whether funds are exiting calmly or being forced to sell.
Morgan Stanley estimated positions had fallen 20% this year to about $1.2 trillion, according to Sept. 24 reports, though the bank hadn't found evidence of broad basis-related market stress at that point. An illustrative $100 million position earning 0.2% annually, net of assumed financing and trading costs, produces $200,000 — a 4% return if the fund has committed only $5 million of its own capital. But if borrowing costs on the other $95 million rise by 0.2% for the year, the extra bill reaches $190,000, consuming almost the entire expected profit without the government defaulting on anything.
How the basis trade works
Hedge funds buy Treasury securities and sell futures against them to capture the pricing gap between the two, while the short futures position hedges against falling bond prices. To pay for the bonds, funds use leverage through repo, a repurchase agreement that works economically like a loan secured by the bond. Repo is usually overnight, so the fund must renew or replace the financing constantly to keep the position open.
Margin calls and haircuts can force an exit
If a bond gains value while the short futures position loses a similar amount, the futures account can demand a cash payment known as variation margin, even though the bond's gain stays tied up in a security the fund hasn't sold. The repo lender can also raise its demands: lending $98 against $100 of bonds is a 2% haircut, and if that haircut doubles to 4%, the fund must supply twice as much of its own money against the same collateral. If many funds unwind at once, their selling can push bond prices down relative to futures, making exits more expensive for funds still holding the trade.
A smaller total doesn't settle the question
Federal Reserve researchers estimated $830 billion of basis positions for September 2025 in research published this June, but that estimate and Morgan Stanley's newer figure use different approaches, so treating them as consecutive readings would manufacture a comparison the data doesn't support. Higher repo rates or larger haircuts matter more if funds must sell into a market with few willing buyers, since financing terms and achievable prices say more about stress than the position total alone. The same caution applies to Bitcoin: connecting Treasury trouble to crypto requires evidence that these institutions are selling crypto or pulling financing, not just an assumption that every cash need ends with a Bitcoin sale.
Source: CryptoSlate
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