US National Debt Surpasses $40 Trillion as Annual Interest Expense Reaches $1.25 Trillion
Resolved · credit · 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?
Structural expansion of sovereign issuance raises term premium and puts upward pressure on the 10-year Treasury yield.
| Question | What the evidence establishes |
|---|---|
| What was reported? | Reported factUnited States national debt has officially crossed $40 trillion. |
| What else was confirmed? | Reported factAnnual 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 and Auction Tail Metrics — Monitor auction allotment stats and primary dealer absorption metrics. |
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 holdingsPublic research record
Research framework · page evidenceCompleted event assessment
higher 10Y yield via term-premium repricing and supply expansion
| Type | Claim | Scope |
|---|---|---|
| Assumption | United States national debt has officially crossed $40 trillion. | 2026-09-28 |
| Interpretation | higher 10Y yield via term-premium repricing and supply expansion | DGS10 |
Countercase, invalidators, and sources
Treasury bill concentration and foreign official buying stabilize long-end auction bid-to-cover ratios.
- · Treasury Quarterly Refunding and Auction Tail Metrics — Monitor auction allotment stats and primary dealer absorption metrics.
- The United States Debt Just Passed an Auspicious Milestone · 2026-09-26
What remains unresolved
- Base path
- Term premium remains elevated as coupon auction sizes persist at elevated levels.
- Adverse path
- Primary dealer auction absorption strain forces a rapid spike in long-term yields and steepens 10s30s.
- Supportive path
- Treasury bill concentration and foreign official buying stabilize long-end auction bid-to-cover ratios.
- · Treasury Quarterly Refunding and Auction Tail Metrics — Monitor auction allotment stats and primary dealer absorption metrics.this week
Evidence
- The United States Debt Just Passed an Auspicious Milestone2026-09-26
“U.S. national debt has surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025.”
Supports: U.S. national debt has surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025.