$39 trillion US debt sparks IMF warning as former Treasury secretary cautions bond market could turn ‘vicious’
The International Monetary Fund has issued a stark warning: the long-standing “safety premium” attached to U.S. Treasury securities is eroding. Once viewed as the world’s ultimate safe haven, Treasuries are now facing structural pressure as rising debt levels reshape global investor behavior.
“The increase in the U.S. Treasury security supply is compressing the safety premium that U.S. Treasuries have traditionally commanded—an erosion that pushes up borrowing costs globally,” the IMF said.
Exploding deficits are driving unprecedented debt levels
Annual U.S. budget deficits have reached roughly $2 trillion, pushing total national debt to $39 trillion. Interest costs alone are now approaching $1 trillion annually, creating a feedback loop where borrowing begets more borrowing.
This rapid expansion means the government must continuously issue new debt, increasing reliance on investor demand at a time when that demand is becoming less certain.
As supply increases, Treasury yields have risen, signaling that investors are requiring higher returns to hold U.S. debt. This shift is significant because Treasury yields serve as the benchmark for borrowing costs across the economy, influencing everything from mortgages to student loans.
Geopolitical pressures and rising defense spending, are expected to further worsen the fiscal outlook and keep upward pressure on yields.
Treasuries are losing ground to corporate debt
The IMF noted that Treasury securities are increasingly competing with a surge in corporate bond issuance. In particular, large-scale borrowing by AI-driven “hyperscaler” companies has flooded markets with alternative investment options.
This has compressed the spread between AAA-rated corporate bonds and Treasuries, a clear sign that investors no longer view government debt as overwhelmingly superior.
One of the most concerning developments is the decline in Treasuries’ “convenience yield,” which reflects their safety and liquidity advantages.
“In other words, Treasuries now offer a higher yield than the synthetic-dollar equivalents for hedged G10 sovereign bonds,” the IMF said.
This reversal suggests investors now require extra compensation to hold Treasuries rather than accepting lower yields for their safety.
Global investors shift toward alternative safe assets
Demand patterns are shifting beyond U.S. borders. Bonds issued by institutions like the World Bank and the European Investment Bank are attracting strong interest.
A recent $4 billion European Investment Bank bond auction drew more than $33 billion in orders, with yields only marginally above comparable Treasuries. This highlights how close substitutes are emerging for what was once a uniquely dominant asset class.
Another structural shift is occurring in the investor base. Global central banks, historically major buyers of Treasuries, are becoming less dominant, while hedge funds are increasing their presence.
Hedge funds now hold a record share of Treasuries, often financed through leveraged positions. This introduces additional risk into the system, as sudden unwinding of these trades could destabilize markets.
Leverage risks could trigger market shockwaves
Apollo chief economist Torsten Slok warned about the scale of leverage tied to Treasury holdings.
“Hedge funds own a record-high 8% of U.S. Treasuries, and with combined repo and prime brokerage borrowing exceeding $6 trillion, any forced unwind of these leveraged positions could send shockwaves through global fixed-income markets,” he said.
Such dynamics increase the fragility of what has traditionally been the most stable segment of global finance.
Debt trajectory seen as unsustainable by policymakers
The IMF described the U.S. fiscal path as governed by “inescapable” arithmetic, urging policymakers to address both revenue and spending.
According to the Congressional Budget Office, U.S. debt has already reached 100% of GDP and is projected to exceed 150% by 2055, driven largely by Social Security and Medicare obligations.
“The window for orderly fiscal adjustment is narrowing,” the IMF said. “Advanced economies with large debt loads need concrete, well-sequenced consolidation measures, not aspirational medium-term targets.”
Henry Paulson warns of a potential bond market crisis
Former Treasury Secretary Henry Paulson echoed these concerns, warning that the U.S. could face a destabilizing loss of confidence in its bond market.
“That’s a dangerous thing,” he said, describing a scenario where falling demand leads to declining Treasury prices and rising yields.
The U.S. Treasury market is foundational to both domestic and global financial systems. It enables government financing and serves as a benchmark for interest rates worldwide.
Historically, strong global demand for Treasuries has reinforced the U.S. dollar’s status as the world’s reserve currency. Any erosion in that demand could have far-reaching consequences for financial stability.
Emergency measures may be needed to prevent a crisis
Paulson warned that if demand weakens significantly, the Federal Reserve may be forced to act as a buyer of last resort; potentially worsening the debt spiral by undermining confidence.
“We need an emergency break-the-glass plan, which is targeted and short-term, on the shelf, so it’s ready to go when we hit the wall,” he said.
“It will be vicious,” he added. “We have to prepare for that eventuality.”
Both the IMF and market veterans agree: the U.S. still has time to act, but that window is closing quickly. Without meaningful fiscal reforms, rising debt levels could trigger a cycle of higher borrowing costs, weakening demand, and escalating financial instability.
The warning is clear; what was once unthinkable for the world’s safest asset is now a growing risk.
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John Dealbreuin came from a third world country to the US with only $1,000 not knowing anyone; guided by an immigrant dream. In 12 years, he achieved his retirement number.
He started Financial Freedom Countdown to help everyone think differently about their financial challenges and live their best lives. John resides in the San Francisco Bay Area enjoying nature trails and weight training.
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