Hedge funds now hold a record share of the $30 trillion Treasury market. What could go wrong?

• Hedge funds purchased $87 billion in Treasurys in the first half of 2026, but leveraged basis-trade positions have fallen 20% this year to $1.2 trillion as Treasury sell-offs intensify
• Funds often use leverage ratios of 20 times or higher in basis trades that exploit tiny price differences between cash Treasurys and futures, making them vulnerable to forced deleveraging during volatility spikes
• The shift comes as pension funds reduce long-term Treasury allocations due to migration from defined-benefit to defined-contribution plans and increased investment in higher-yielding private credit

Market Summary: Hedge Funds' Growing Treasury Market Presence Raises Stability Concerns

Key Facts and Figures

Hedge funds now hold a record 7% of the $30 trillion U.S. Treasury market as of end-2025, with cash holdings reaching nearly triple their levels from five years earlier. Marketable Treasury debt totaled $28.9 trillion. Domestic hedge funds purchased $87 billion in Treasurys during the first half of 2026 ($26.4 billion in Q1, $60.6 billion in Q2).

The 10-year Treasury yield recently surged to its highest level since 2007, while the 30-year hit levels not seen since 2004. Leveraged Treasury basis-trade positions have declined approximately 20% in 2026 to $1.2 trillion, according to Morgan Stanley.

Market Participants and Sectors

Traditional long-term investors like pension funds are reducing Treasury allocations, shifting toward higher-yielding private credit investments (approximately $300 billion inflows in 2025). Hedge funds are filling this gap but employing fundamentally different strategies focused on short-term performance rather than liability matching.

Primary Concerns

Regulators, including the Federal Reserve and international authorities, warn that hedge fund leverage remains near record highs, concentrated among large funds. The popular basis trade—buying cash Treasurys while selling futures—often employs leverage ratios of 20x or higher on razor-thin margins.

Market Implications

The dual nature of hedge fund participation presents both opportunities and risks. While their active trading can enhance market liquidity and price discovery under normal conditions, regulators fear that forced deleveraging during stress events could trigger a destabilizing cycle of margin calls, selling pressure, and cascading volatility—similar to the March 2020 crisis. The tension between necessary liquidity provision and systemic risk concentration remains a critical policy challenge.