What explains the rising U.S. deficit, and who is buying Treasuries?
Core argument: The "rest of the world" has been the single biggest buyer of U.S. notes and bonds in recent quarters.
Net borrowing was 5.4% of GDP in 2019, compared to 7% in 2024 Q1-Q3. [An] increase in interest payments explains about 1.4 percentage points of the total 1.6pp increase in the deficit. The single biggest buyer of notes and bonds in the past few quarters has been the “rest of the world.” The simplest assumption is that receipts will keep pace with GDP, non-interest spending will gradually rise relative to GDP thanks to population aging and the tendency of healthcare costs to rise faster than other prices, and that the overall deficit will continue to expand. The benign scenario is that private indebtedness continues to fall but that private spending remains robust. In this case, the unusually large budget deficit would [cause] a slow unwinding of the decades-long run-up in private indebtedness that preceded the global financial crisis. The “Brazil” alternative is that policymakers feel compelled to embrace fiscal austerity as the private sector gets squeezed by high real interest rates and tight credit.






