US National Debt Exceeds $40 Trillion Amid Rising Treasury Yields

Concerns over the fiscal outlook of the United States are mounting as the national debt surpasses $40 trillion and long-dated Treasury yields hit their highest levels since 2007. While Treasury Secretary Scott Bessent has stated that the U.S. can grow out of the debt, historical precedent indicates that past financing challenges required Washington to create new methods to raise funds when traditional investors and instruments fell short.

During the Civil War, federal debt escalated rapidly from about $65 million in 1860 to roughly $2.7 billion in 1865. To absorb this issuance, Washington enacted the National Banking Acts, requiring federally chartered banks to back their currency with U.S. bonds. Financier Jay Cooke also popularized federal debt as a retail product through nationwide banking networks, advertising, and patriotic appeals.

In February 1895, a combination of recession, gold exports, and fears of a shift to silver depleted the Treasury's gold reserve to $41.3 million. President Grover Cleveland partnered with private financiers J.P. Morgan and August Belmont Jr. to supply over $65 million in gold to stabilize the reserve. In exchange, the syndicate received $62 million in 30-year, 4% Treasury bonds, though the arrangement intensified public criticism regarding Wall Street's influence over public policy.

Financing World War II necessitated cheap borrowing and civilian spending restraint to control inflation, leading to the widespread adoption of war bonds. By June 1943, approximately 27 million Americans participated in voluntary payroll plans, with war bonds ultimately financing roughly half of the wartime debt. Simultaneously, the Federal Reserve pegged Treasury-bill rates and capped long-term yields until price pressures culminated in the Treasury-Fed Accord of March 1951.

By the early 1960s, foreign dollar claims outpaced U.S. gold reserves. Operation Twist was deployed to raise short-term rates to support the dollar while keeping long-term rates low for investment. This strategy involved the Fed selling short-term bills and buying long-term Treasuries, supplemented by foreign-currency "Roosa bonds" sold to foreign central banks. Operation Twist was later revived between 2011 and 2012 to support economic recovery following the 2007–2009 financial crisis.

Rising inflation and interest-rate volatility in the late 1960s rendered the Treasury's fixed-price system for notes and bonds risky. To allow market demand to set prices, the Treasury initiated coupon-bearing debt auctions in 1970, fully transitioning notes and bonds to auctions by mid-1973 and introducing yield-based auctions in 1974.

In 1978, renewed pressure on the dollar led the Carter administration to execute a coordinated support program with West Germany, Japan, and Switzerland. This initiative involved expanded swap lines and the issuance of "Carter bonds" denominated in Deutsche marks and Swiss francs to raise foreign cash for purchasing dollars.

"As the United States national debt crosses $40 trillion alongside rising Treasury yields, businesses and investors must closely monitor macroeconomic indicators. History demonstrates that shifting sovereign financing strategies often trigger broader adjustments in global liquidity, interest rates, and capital markets. For growing enterprises and entrepreneurs, understanding these historical precedents provides essential context for navigating potential shifts in monetary policy and borrowing costs." — Dr. Shishir Gupta, Founder & CEO, StartupLanes