S&p holds U.S. AA+ as debt costs mount

By mid-2026, the U.S. national debt has surged past $39 trillion, with the government now spending over $1 trillion annually on interest payments—an amount that eclipses major budget categories such as the entire military and healthcare combined. This staggering financial burden reflects not only the sheer scale of borrowing but also the sensitivity of interest costs to long-term rates, which, despite currently low levels due to factors like falling oil prices and cooling inflation, are beginning to rise as investors demand a higher premium for lending to the government over extended periods.

Federal budget deficits are driving this debt growth at an unprecedented pace, with the government borrowing roughly 6% of GDP annually even amid a healthy economy and low unemployment—a historically unusual scenario that signals deeper fiscal governance challenges. The first nine months of fiscal year 2026 alone saw deficits near $1.4 trillion, surpassing 2025 levels, while the need to refinance approximately $10 trillion in debt this year threatens to overwhelm fiscal stability and exacerbate the debt spiral.

Fiscal experts like Maya MacGuineas warn that without significant policy reforms, especially to entitlements such as Social Security and Medicare—which are on track for trust fund exhaustion within seven years—the U.S. faces an unsustainable debt trajectory. Rising social spending, with Social Security benefits up 5% and Medicare outlays increasing 8%, compounds the pressure, prompting growing calls among policymakers to reduce deficits to around 3% of GDP to avert a fiscal crisis.

The trajectory of interest rates poses a looming threat: should long-term borrowing costs climb to 5% or 6%, the federal interest bill could balloon, pushing deficits above 10% of GDP and triggering a dangerous feedback loop of escalating debt and deficits. This risk underscores the precarious balance between current low rates and investor nervousness, as reflected in the highest long-term lending premiums in over a decade, signaling market skepticism about the sustainability of the U.S. fiscal path.

Despite the U.S. national debt surpassing $39 trillion and a rising debt-to-GDP ratio, S&P Global Ratings reaffirmed the U.S. sovereign credit rating at AA+ with a stable outlook as of June 2026. This decision underscores a cautious confidence in the country's fiscal resilience, even as record federal budget deficits continue to swell the debt burden. However, the affirmation also implicitly acknowledges the mounting fiscal governance challenges, including deep political polarization and the persistent difficulty in achieving bipartisan reforms necessary to stabilize long-term debt trajectories.

The Federal Reserve has been covertly managing the soaring U.S. national debt by subtly expanding its balance sheet, which reached a 15-month high of approximately $6.737 trillion by mid-2026, quietly supporting debt sustainability through inflationary effects without overtly signaling traditional quantitative easing. This stealth approach allows the Fed to influence market dynamics and debt costs while maintaining plausible deniability, as it can claim to be supporting business borrowing rather than directly 'printing money,' thereby navigating political sensitivities around explicit debt monetization.

Regulatory changes have engineered a forced demand for U.S. Treasuries by major banks and stablecoins, effectively creating an invisible money-printing mechanism that sustains Treasury market stability amid ballooning debt. The April 1 loosening of the supplementary leverage ratio freed up about $3 trillion in bank capital to purchase Treasuries, while the Genius Act mandates stablecoins like Tether be backed one-for-one by cash or short-term Treasuries, expanding this demand pool from $300 billion to potentially $1-$3 trillion. This layered strategy masks inflationary money creation by shifting debt purchases from the Fed’s balance sheet to regulated financial entities, thereby maintaining market confidence without direct Fed intervention.

Facing the unsustainability of a hawkish Federal Reserve stance alongside a rapidly growing $39 trillion debt, the Fed is pivoting its asset composition toward short-term Treasury bills to better manage interest rate risk and reduce volatility in its balance sheet. By increasing holdings of T-bills and reducing agency mortgage-backed securities—due to their prepayment risk and fiscal policy entanglements—the Fed aims to shrink its duration gap, aligning short-term liabilities with short-term assets, which stabilizes its portfolio and lowers interest expense uncertainty amid ongoing debt pressures.

Artificial intelligence is increasingly viewed as a critical, though insufficient, long-term strategy to manage the national debt by driving productivity gains and economic growth, thereby expanding the tax base and potentially reducing fiscal outlays, especially in healthcare. Elon Musk has emphasized AI and robotics as the only viable solution to the debt crisis, a view supported by BNP Paribas’s raised GDP growth forecasts linked to AI investment. However, studies caution that while AI can lower prices and improve efficiency, it may paradoxically increase social security burdens due to longer lifespans, underscoring the complex tension between growth-driven and inflation-driven debt management paths.

The origins of the U.S. national debt trace back to Alexander Hamilton’s revolutionary fiscal strategy, which consolidated state and war debts into a unified national obligation, thereby establishing early U.S. creditworthiness and fostering investor trust both domestically and in European markets. This foundational move transformed Treasury bonds into one of the world’s safest assets, underpinning the global financial system and granting the U.S. an “exorbitant privilege” to borrow at relatively low costs despite soaring debt levels. However, recent Treasury auctions demanding higher yields signal emerging market concerns about debt sustainability, even as the debt-to-GDP ratio hovers around 100% and is projected by the Congressional Budget Office to reach 175% by 2056, inching toward the Penn Wharton Budget Model’s 210% solvency threshold that portends drastic fiscal adjustments or default risks.

Historical precedent from the 1930s reveals that during severe fiscal crises, the U.S. government has resorted to gold revaluation as a monetary reset to alleviate debt burdens, exemplified by Roosevelt’s increase of gold’s official price from $20.67 to $35 per ounce, which effectively devalued the dollar and eased the real weight of debt. Today, market rumors linking former President Trump’s potential return to unconventional monetary strategies—such as gold-linked instruments or a gold revaluation—reflect investor anxiety over the ballooning public debt and the fragility of monetary credibility. As noted, gold transcends its role as a mere commodity or inflation hedge, serving instead as a barometer of confidence in paper money; when trust falters, gold becomes central to monetary policy imagination and potential debt management tools.

The Treasury’s recent return to net issuance of Treasury bills, including approximately $39 billion in new issuance aimed at rebuilding the Treasury General Account from $771 billion back toward $1 trillion, signals a critical liquidity test in financial markets. This cyclical pattern of increasing bill auctions ahead of major tax dates impacts banking reserves and interest rate benchmarks like SOFR, while market indicators such as a 58% rise in the VIX on settlement days and underperformance in the semiconductor sector underscore stress linked to Treasury bill issuance dynamics. These market signals highlight the delicate balance the Treasury must maintain to manage liquidity and investor demand amid escalating debt pressures.