U.S. National Debt Crosses $40T as Net 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?
Surpassing $40 trillion in sovereign debt with $1.25 trillion annual net interest costs increases Treasury issuance volumes, steepening term premia on long-dated debt.
| Question | What the evidence establishes |
|---|---|
| What was reported? | Reported factU.S. national debt has surpassed $40 trillion. |
| What else was confirmed? | Reported factNet annual 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? | UnknownU.S. Treasury refunding and auction bid-to-cover metrics — Monitor primary dealer absorption rates and tail spreads at upcoming coupon auctions |
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
- · U.S. national debt has surpassed $40 trillion.
- · Net annual interest costs reached $1.25 trillion in 2025.
- · Sustained debt expansion increases Treasury auction supply pressures amid higher benchmark yields.
Public research record
Research framework · page evidenceCompleted event assessment
term premium expansion driven by ongoing Treasury auction issuance supply
| Type | Claim | Scope |
|---|---|---|
| Assumption | U.S. national debt has surpassed $40 trillion. | 2026-09-28 |
| Interpretation | term premium expansion driven by ongoing Treasury auction issuance supply | DGS10 |
Countercase, invalidators, and sources
Treasury auction demand remains solid across foreign and institutional buyers, absorbing increased issuance without yield spikes.
- · U.S. Treasury refunding and auction bid-to-cover metrics — Monitor primary dealer absorption rates and tail spreads at upcoming coupon auctions
- The United States Debt Just Passed an Auspicious Milestone · 2026-09-26
What remains unresolved
- Base path
- High interest expense sustains term premia in the 10-year and 30-year segments of the Treasury curve.
- Adverse path
- Auction tailing and softening bid-to-cover metrics trigger sharp yield spikes across long-dated government paper.
- Supportive path
- Treasury auction demand remains solid across foreign and institutional buyers, absorbing increased issuance without yield spikes.
- · U.S. Treasury refunding and auction bid-to-cover metrics — Monitor primary dealer absorption rates and tail spreads at upcoming coupon auctionsnext month
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. Howard Marks advises against panic-driven portfolio changes.”
Supports: U.S. national debt surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025