U.S. debt is the 'elephant in the room' amid bond market rout as Fed-fueled interest costs could drive even larger deficits, analysts warn

In recent weeks, the bond market has experienced a significant selloff, largely influenced by rising oil prices that have contributed to inflation. However, analysts at Bank of America (BofA) emphasize that the worsening U.S. fiscal situation is becoming an increasingly critical element in this scenario.

On Friday, BofA reported the return of the so-called bond vigilantes—traders who respond to substantial deficits by selling off bonds, thereby driving yields higher.

This development comes as long-term yields reached their highest levels since the Great Financial Crisis on Tuesday, prompted by strong inflation data, ongoing geopolitical tensions in the Strait of Hormuz, robust consumer spending, and a resilient labor market.

BofA analysts remarked, "In our view, unsustainable fiscal dynamics are compounding with a reflation story, turning a short-term problem into a long-end selloff."

Nevertheless, this situation is not solely attributable to fiscal issues. Economic indicators suggesting persistent inflation, coupled with uncertainty related to the Iran conflict, have contributed to the bond market turmoil.

Traditionally, high inflation combined with sustained economic growth would incentivize markets to anticipate rate hikes from the Federal Reserve, resulting in a flattening of the yield curve as short-term rates rise faster than long-term rates. Contrary to this expectation, the current trend has seen the yield curve steepen, with long-term rates leading the surge. The 30-year yield reached 5.18% on Tuesday, marking the highest level since 2007.

BofA succinctly stated, "Fiscal policy is the elephant in the room," asserting that deteriorating U.S. fiscal dynamics are a primary catalyst for the selloff.

The federal government has indicated that it must issue more debt than previously anticipated, as weakened cash flow coincides with President Donald Trump's tax cuts resulting in larger-than-expected refunds this tax season.

Furthermore, the recent rise in yields has escalated the cost of servicing U.S. debt. The Committee for a Responsible Federal Budget estimated that if interest rates remain approximately 55 basis points above the projections from the Congressional Budget Office across the yield curve, the national debt could increase by an additional $2 trillion over the next decade.

Additionally, projected interest costs are expected to rise from $970 billion in 2025, representing 3.2% of GDP, to $2.5 trillion by 2036, or 5.3% of GDP. Consequently, debt servicing is projected to consume 30% of federal revenue by 2036, up from 19% in 2025, according to the CFRB.

If the Federal Reserve decides to raise interest rates in an attempt to control inflation, the bond market may begin to factor in the potential ramifications for U.S. debt levels.

BofA noted, "In an environment where the Fed could potentially become a driver of even larger fiscal deficits amid rising debt servicing costs, the long end of the curve becomes more sensitive to what should primarily be seen as moves in short-end rates."

The market continues to maintain confidence that the Fed is prioritizing price stability over political pressure from Trump to lower rates. Notably, Trump, during the swearing-in of new Fed Chairman Kevin Warsh, urged him to "do your own thing." Fed Governor Chris Waller emphasized the intention to raise rates if consumers' expectations of long-term inflation become destabilized.

BofA cautioned, "The question is not whether the Fed should hike, but rather if it will be able to do so amidst political pressure should economic fundamentals necessitate it."

Recent auctions of U.S. debt have indicated weak demand for long-term Treasuries. Earlier this month, the Treasury Department sold $25 billion in 30-year bonds at a 5% yield, the first time this rate has occurred since 2007. Prior to this, no 30-year Treasury had an interest rate exceeding 4.75%.

This marks a stark contrast to mid-February, just before the outbreak of conflict between the U.S. and Israel regarding Iran, when a Treasury offering achieved the highest demand in history for 30-year bonds.

In addition to the recent long bond auction, sales of three- and 10-year Treasuries also attracted lower-than-expected demand.

There is an emerging trend of caution among bond investors; March auctions for two-, five-, and seven-year Treasury notes all experienced weak demand, pushing yields higher than anticipated.

In response to these developments, Treasury Secretary Scott Bessent asserted that the current energy crisis is likely to be a temporary situation but acknowledged that it may take six to nine months for U.S. oil prices to stabilize. He expressed confidence that oil producers will eventually increase supply significantly, citing record-high U.S. output and suggesting that the UAE's departure from OPEC will allow it to produce freely, while other Persian Gulf nations are expected to ramp up production significantly.