Hedge funds now hold a record share of the roughly $30 trillion U.S. Treasury market, shifting the backbone of global finance toward leveraged traders. This change gives the government more buyers for its growing debt, but it also leaves the world's largest bond market exposed to sudden swings.

Cash Treasury holdings by these funds reached $2 trillion at the end of 2025, nearly triple what they were five years earlier. Marketable debt sat at $28.9 trillion, pushing hedge fund ownership to a record 7%. Domestic funds kept buying through the first half of 2026, adding about $87 billion to their positions. The market has reacted sharply to the shift, with the 10-year yield hitting its highest point since 2007 and the 30-year rate climbing to a peak unseen since 2002.

Traditional long-term buyers are stepping away. Pension funds used to absorb these bonds to match payouts decades into the future. Structural changes are shrinking that demand, as defined-benefit plans migrate toward defined-contribution accounts that prioritize different investment returns. At the same time, institutional investors moved close to $300 billion into private credit in 2025, pulling capital away from government debt.

Hedge funds do not simply hold these bonds for steady income. They chase shorter-term performance using relative-value strategies that exploit tiny price gaps between cash Treasurys and futures contracts. Because these price differences are small, funds borrow heavily through repo markets to multiply their buying power. This leverage turns modest price moves into significant profits, but it also ties their survival to constant market access.

Regulators are watching closely. The Federal Reserve flagged in its May financial stability report that leverage remains near record highs and concentrated among large funds. When markets turn, leveraged positions can collapse quickly. "The biggest risk is the basis trade, where a hedge fund simultaneously buys Treasury notes and sells the futures contract that the notes are eligible to settle against," said Don Steinbrugge, founder and CEO of Agecroft Partners. "These trades have thin margins and can often be levered 20 times, if not higher."

The pullback in these trades this year shows how fast positions shrink when conditions worsen. Leveraged basis trades have already fallen about 20% to $1.2 trillion, according to Morgan Stanley. Yet experts argue the sector still performs a necessary function. Ken Heinz of Hedge Fund Research noted that active trading provides two-sided liquidity during both market rallies and sell-offs. "Regulators should be concerned about the potential for a disorderly unwind while weighing the benefits of market liquidity that hedge funds provide when making policy decisions," Steinbrugge said. "Hedge funds' growing role in the Treasury market is both necessary for liquidity and a potential source of systemic risk."