US National Debt Tops $40 Trillion as Annual Interest Expense Hits $1.25 Trillion
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?
Expanding sovereign debt issuance increases Treasury supply, putting upward term-premium pressure on 10-year yields and depressing TLT prices.
| Question | What the evidence establishes |
|---|---|
| What was reported? | Reported factUnited States national debt has surpassed $40 trillion. |
| What else was confirmed? | Reported factAnnual federal interest servicing costs reached $1.25 trillion in 2025. |
| Does the valuation support acting? | UnknownRequires applying the change to specific holdings. |
| What would change the assessment? | UnknownUS Treasury Refunding Announcements — Auction sizing announcements for upcoming 10-year and 30-year Treasury bond issuances. |
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 debt supply expansion
| Type | Claim | Scope |
|---|---|---|
| Assumption | United States national debt has surpassed $40 trillion. | 2026-09-28 |
| Interpretation | higher 10Y yield via term-premium repricing and debt supply expansion | TLT |
Countercase, invalidators, and sources
Treasury auction demand from foreign official and institutional accounts absorbs high issuance without pushing 10-year yields above 5.30%.
- · US Treasury Refunding Announcements — Auction sizing announcements for upcoming 10-year and 30-year Treasury bond issuances.
- The United States Debt Just Passed an Auspicious Milestone · 2026-09-26
What remains unresolved
- Base path
- Persistent issuance keeps long-term yields elevated, pinning TLT in a lower trading band and maintaining tight financial conditions.
- Adverse path
- Auction tailing and dealer concession requirements force yields higher, steepening the curve and driving broad equity multiple contraction.
- Supportive path
- Treasury auction demand from foreign official and institutional accounts absorbs high issuance without pushing 10-year yields above 5.30%.
- · US Treasury Refunding Announcements — Auction sizing announcements for upcoming 10-year and 30-year Treasury bond issuances.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: US debt passed $40 trillion with annual interest costs reaching $1.25 trillion in 2025.