India, Sept. 27 -- US debt has reached $40 trillion, while Treasury yields are rising sharply, adding to concerns about the country's debt outlook. Higher yields mean the US government has to pay more interest when it borrows money, putting additional pressure on the federal budget.

The 10-year Treasury yield climbed to 5.23% on Friday, its highest level since 2007. The yield has risen by more than 1 percentage point from its level just before the Iran war began, Fortune reported.

The 30-year Treasury yield also jumped to 5.49%, reaching its highest level since 2004. These longer-term Treasury yields are important because they influence borrowing costs across the US economy, including mortgages and other loans.

Several factors are push...