The U.S. government faces a growing fiscal challenge as elevated borrowing costs threaten to increase the cost of servicing its debt. A scenario presented in the supplied chart, based on Congressional Budget Office (CBO) projections, suggests that interest rates remaining above baseline assumptions could substantially increase federal deficits and push the public debt-to-GDP ratio to new highs over the next decade.

Higher Interest Rates Could Significantly Increase Federal Deficits

According to the figures presented by The Kobeissi Letter, if interest rates average 150 basis points above the CBO’s February 2026 projections, cumulative U.S. deficits could increase by nearly $6 trillion through 2036. Under this scenario, the deficit would reach approximately 8.8% of gross domestic product, a level the source describes as the highest since World War II outside the exceptional periods of 2008 and 2020.

A separate scenario in the chart assumes rates average 50 basis points above the CBO baseline. In that case, deficits would increase by nearly $2 trillion, with the public debt-to-GDP ratio reaching approximately 124% by 2036. These figures are scenario estimates, not guaranteed outcomes. The eventual fiscal impact would depend on the path of interest rates, economic growth, federal revenues, government spending and the maturity structure of outstanding debt.

Debt-to-GDP Ratio Could Reach Record Levels

The chart compares the CBO baseline with two higher-interest-rate scenarios. Under the baseline, the public debt-to-GDP ratio reaches approximately 120% by 2036. If rates average 50 basis points above projections, the ratio rises to 124%, while a 150-basis-point increase pushes it to 133%.

The debt-to-GDP ratio measures federal debt held by the public relative to the size of the economy. A rising ratio can indicate that debt is accumulating faster than the economy’s capacity to support it. Higher interest expenses can also create a feedback effect: additional borrowing increases the amount of debt requiring financing, while elevated rates raise the cost of servicing that debt. Nevertheless, the ratio alone does not determine a government’s ability to borrow; economic growth, the dollar’s international role, investor demand and fiscal credibility also matter.

Treasury Yields and Federal Reserve Policy Remain Critical

The supplied post notes that the U.S. 10-year Treasury yield recently reached approximately 5.30%, around 100 basis points above the CBO’s projected average rate over the following decade. This comparison illustrates the potential sensitivity of federal finances to borrowing costs, but a market yield at a particular point in time is not directly equivalent to the government’s average interest rate on all outstanding debt. Treasury securities have different maturities, and changes in market yields affect federal interest expenses gradually as debt is issued or refinanced.

Higher yields can reflect persistent inflation, stronger growth expectations, increased Treasury issuance or greater compensation demanded by investors for holding longer-term debt. Federal Reserve rate cuts could ease some short-term financing pressures, but they would not automatically reduce long-term Treasury yields or eliminate structural deficits. The Federal Reserve sets monetary policy independently, while fiscal outcomes depend on decisions made by Congress and the administration.

Going forward, investors will monitor Treasury yields, inflation, economic growth, federal budget projections and the trajectory of interest payments. If borrowing costs remain above baseline assumptions for an extended period, debt-service expenses could place additional pressure on the federal budget and increase the importance of fiscal policy choices. For investors in Israel and globally, changes in U.S. borrowing requirements and Treasury yields matter because they influence international financing conditions, currency markets and the valuation of financial assets. The key issue is whether economic growth and government revenues can keep pace with the cost of financing an expanding federal debt burden.