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At first glance, the figure is certainly eye-catching. Yet it is important to remember that concerns about US government debt are not new. Investors, economists and rating agencies have been discussing the country’s growing debt levels for many years.
In fact, government debt was a key factor cited by Moody’s when it downgraded the US sovereign credit rating in 2025. The rating agency highlighted the ongoing rise in federal debt alongside persistent budget deficits and growing interest costs. While such developments attract headlines, they do not necessarily represent new information for financial markets.
One useful measure of how investors view the risk of US government debt is the credit default swap (CDS) market. CDS contracts provide insurance against a borrower defaulting on its debt. In simple terms, the higher the cost of this insurance, the greater the perceived risk.
Interestingly, CDS spreads on US government debt do not suggest that investors have become significantly more concerned in recent months. While there was a temporary spike in CDS costs during the tariff-related market uncertainty of April 2025, spreads have otherwise remained broadly stable over the past three years.
This distinction matters because markets are forward-looking. Asset prices are not based on today’s news alone; they reflect collective expectations about the future. Investors around the world constantly assess economic conditions, government finances, company profits, interest rates and geopolitical risks. These expectations are then incorporated into the prices of shares and bonds.
As a result, the existence of high government debt levels is already reflected in market valuations to the extent that investors believe it will affect future economic outcomes. For long-term investors, this is an important point. Headlines may create anxiety, but reacting to widely known information can often be counterproductive.
That does not mean debt levels are irrelevant. A meaningful deterioration in the fiscal outlook, a sharp increase in borrowing costs, or an unexpected loss of confidence in US government finances could have implications for markets. However, absent a significant change in the underlying situation, it is difficult to argue that the recent crossing of the $40 trillion threshold alone necessitates a change in investment strategy.
For most investors, the most sensible course remains the same: maintain a well-diversified portfolio aligned with your long-term goals and risk tolerance. While headlines will continue to come and go, successful investing is rarely driven by reacting to them. Instead, it is built on patience, discipline and an evidence-based approach to managing wealth over time.
The rise in US government debt is worth monitoring, but it is not a new development. Markets have been aware of these challenges for years, and current market pricing suggests investors’ assessment of the risk has not materially changed. For long-term investors, staying focused on a well-constructed financial plan remains far more important than reacting to headline figures.
