David Lin
CBO Director Warns Debt Will Surpass WWII Levels, Interest Rates To Spike | Phillip Swagel
Most Important Insight
The U.S. federal debt is on a definitive path to surpass its post-WWII record of 106% of GDP by 2028, driven by a structural primary deficit and an escalating interest-rate-to-growth differential that leaves no room for fiscal error.
Most Original Insight
The CBO identifies a specific 'crowding out' mechanism where every additional dollar of federal borrowing is now projected to reduce private investment by 33 cents, creating a permanent drag on capital stock and long-term productivity.
Key Points
- Federal debt held by the public is projected to reach 107% of GDP by 2028, exceeding the historical peak set in 1946.
- Emergency supplemental spending related to the Iran War has significantly worsened the 2026-2036 budget outlook compared to previous baseline projections.
- Net interest outlays are the fastest-growing component of the budget, expected to reach $1.6 trillion annually by 2034, surpassing total defense spending.
- The expiration of the 2017 tax provisions (TCJA) creates a massive revenue gap that, if extended without offsets, would add approximately $4.6 trillion to the 10-year deficit.
- CBO projects the 10-year Treasury yield will average 4% over the next decade, a level that structurally increases the cost of rolling over existing debt.
- Social Security and Medicare trust funds are facing accelerated exhaustion dates, with Medicare's Hospital Insurance fund projected to be insolvent by the early 2030s.
- The 'primary deficit'—the gap between spending and revenue excluding interest—remains stuck at roughly 3% of GDP, indicating the debt is growing even before interest is factored in.
Investment Implications
| Asset / Sector / Instrument | Action | Source | Notes |
|---|---|---|---|
| Aerospace & Defense Sector | BUY | implicit | The Iran War and emergency supplemental spending mentioned by Swagel provide a direct revenue tailwind for defense contractors. |
| Gold | BUY | implicit | Concerns regarding fiscal insolvency and the potential for 'fiscal dominance' to force the Fed's hand make hard assets a necessary hedge. |
| Inflation-Protected Securities (TIPS) | BUY | implicit | The structural nature of the deficit and the cost of the Iran War increase the long-term risk of an inflationary breakout. |
| US 10Y Treasuries | SELL | implicit | Rising debt supply and the CBO's warning of a 'spike' in interest costs suggest sustained upward pressure on long-term yields. |
| S&P 500 Growth Stocks | SELL | implicit | Higher structural interest rates and the 'crowding out' of private capital will likely compress valuation multiples for high-duration equities. |
Hang on a sec…
- Swagel's projection that the 10-year Treasury yield will average 4% seems overly optimistic given the massive issuance required to fund both the structural deficit and the Iran War.
- The CBO's reliance on 'current law' projections fundamentally understates the deficit because it assumes Congress will allow popular tax cuts to expire, which is historically and politically improbable.
- The claim that the U.S. can maintain its reserve currency status while debt-to-GDP heads toward 166% by 2054 ignores the geopolitical reality that creditors may eventually demand a higher risk premium.