US National Debt Surpasses $40T as Annual Interest Expense Hits $1.25T
Resolved · macro data · Occurred · Assessed · 1 sources
This assessment is dated 2026-09-28. Check what remains unresolved below before relying on it.
What changed relative to expectations?
Higher mandatory interest outlays expand federal net issuance requirements, putting upward supply pressure on benchmark 10Y Treasury term premiums.
| Question | What the evidence establishes |
|---|---|
| What was reported? | Reported factUnited States national debt has crossed $40 trillion. |
| What else was confirmed? | Reported factAnnual federal debt interest costs reached $1.25 trillion in 2025. |
| Does the valuation support acting? | UnknownRequires applying the change to specific holdings. |
| What would change the assessment? | UnknownTreasury Quarterly Refunding Statement — Coupon issuance size breakdowns across 10Y and 30Y tenors. |
What would this event cost your holdings?
Apply your own hypothetical returns to current holding values. The calculator does not infer security effects from this event.
Test this event against my holdingsReported facts
- · United States national debt has crossed $40 trillion.
- · Annual federal debt interest costs reached $1.25 trillion in 2025.
- · Value investor Howard Marks noted the milestone while recommending companies with pricing power and geographic diversification.
Public research record
Research framework · page evidenceCompleted event assessment
higher 10Y yield via term-premium repricing and debt supply expansion
| Type | Claim | Scope |
|---|---|---|
| Assumption | United States national debt has crossed $40 trillion. | 2026-09-28 |
| Interpretation | higher 10Y yield via term-premium repricing and debt supply expansion | DGS10 |
Countercase, invalidators, and sources
Primary deficits narrow through expenditure restraint, mitigating auction concession size and capping long yields.
- · Treasury Quarterly Refunding Statement — Coupon issuance size breakdowns across 10Y and 30Y tenors.
- The United States Debt Just Passed an Auspicious Milestone. Here's What Legendary Value Investor Howard Marks Says Investors Should Do About It. · 2026-09-26
What remains unresolved
- Base path
- Heavy Treasury auction supply continues, keeping term premium elevated and 10Y yields near multi-year highs.
- Adverse path
- Accelerating interest compounding triggers rating agency outlook warnings and sharp duration sell-offs.
- Supportive path
- Primary deficits narrow through expenditure restraint, mitigating auction concession size and capping long yields.
- · Treasury Quarterly Refunding Statement — Coupon issuance size breakdowns across 10Y and 30Y tenors.next month
Evidence
- The United States Debt Just Passed an Auspicious Milestone. Here's What Legendary Value Investor Howard Marks Says Investors Should Do About It.2026-09-26
“U.S. national debt has surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025. Howard Marks advises against panic-driven portfolio changes...”
Supports: U.S. national debt has surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025.