Who Owns America’s Debt?

America’s $38.5 trillion debt is held by four broad categories of owners, each with different motivations, different risk tolerances, and different implications for financial stability. Domestic private investors — a category that includes mutual funds, pension funds, insurance companies, banks, hedge funds, and individual savers — hold $26.6 trillion, or about 69% of the total. They are the backbone of the Treasury market, and their appetite has proven remarkably durable even as the debt has ballooned.

Foreign holders own $9.2 trillion — about 24% of the total. Japan is the largest foreign creditor at $1.1 trillion, followed by China at roughly $760 billion (down from a peak of $1.3 trillion in 2013). The United Kingdom, Luxembourg, and the Cayman Islands round out the top five, though the latter two are largely custodial locations for institutional investors worldwide. Foreign holdings have grown from $1.1 trillion in 2000 to $9.2 trillion today, but their share of total debt has actually declined from 18% to 24% — because domestic holders have grown even faster.

The Federal Reserve holds $4.5 trillion, down from a peak of $6.3 trillion in mid-2022. The Fed’s holdings are the most politically charged category, because they represent monetization — the central bank creating money to buy government debt. During three rounds of quantitative easing (2008–2014) and the COVID emergency (2020–2022), the Fed absorbed trillions of new Treasury issuance. Since June 2022, the Fed has been running “quantitative tightening” (QT), allowing up to $60 billion per month in Treasuries to mature without reinvesting. The $1.8 trillion decline from peak represents the largest central bank balance sheet unwind in history.

Federal government accounts — principally the Social Security Trust Fund, the Medicare Trust Fund, and military retirement funds — hold $7.6 trillion. These are “intragovernmental” holdings: the government owes the money to itself, in the sense that one arm of government (Treasury) has borrowed from another (Social Security). The trust fund holdings have grown slowly and will begin to decline as the Social Security Trust Fund draws down its reserves, which the trustees project will be exhausted by 2033.

The Federal Reserve’s journey as a Treasury holder is the most dramatic arc in the ownership story. In 2007, the Fed held $791 billion in Treasuries — a modest portfolio used for routine monetary operations. Then Lehman Brothers collapsed, and everything changed. Between November 2008 and June 2010 (QE1), the Fed bought $300 billion in Treasuries. Between November 2010 and June 2011 (QE2), it bought $600 billion more. Between September 2012 and October 2014 (QE3), it bought an additional $1.6 trillion. By the end of 2014, the Fed held $2.5 trillion — a threefold increase in six years.

COVID blew those numbers apart. Between March 2020 and March 2022, the Fed purchased roughly $3.3 trillion in Treasuries, expanding its holdings from $2.5 trillion to $5.8 trillion in two years. At its June 2022 peak of $6.3 trillion, the Federal Reserve held more U.S. government debt than any foreign nation, any single institution, or any other entity on the planet. It was, for a brief period, the buyer in the Treasury market — absorbing virtually all net new issuance and effectively setting prices.

Then the Fed reversed course. Quantitative tightening has shrunk the portfolio by $1.8 trillion since mid-2022, bringing it to $4.5 trillion. The question that haunts the Treasury market is: who filled the gap? The Fed was buying $80 billion per month; now it is letting $60 billion per month roll off. That is a $140 billion monthly swing in demand for Treasuries. The answer, as the data shows, is domestic private investors — mutual funds, pension funds, banks, and increasingly, hedge funds running leveraged “basis trades” that exploit tiny differences between Treasury bonds and futures. Whether these private buyers are as reliable as the Fed is an open question, and the auction data in Episode 8 suggests the answer is “not quite.”

Foreign holdings of U.S. debt have grown from $1.1 trillion in 2000 to $9.2 trillion in 2025 — an 8.4x increase. But the composition has shifted dramatically. In the early 2000s, the buying was driven by Asian central banks, particularly China and Japan, which accumulated massive dollar reserves from their trade surpluses and recycled them into Treasuries. China’s holdings surged from $60 billion in 2000 to $1.3 trillion in 2013 — a twenty-fold increase that made China America’s largest foreign creditor and created what some economists called “Chimerica” — a symbiotic relationship where China manufactured goods, America consumed them, and China lent the proceeds back to America to keep consuming.

That relationship has fractured. China has reduced its Treasury holdings by roughly $540 billion since the 2013 peak, from $1.3 trillion to approximately $760 billion. The selling accelerated after 2022, with China unloading an estimated $129 billion in 2024 alone. The motivations are partly geopolitical (reducing vulnerability to U.S. financial sanctions), partly economic (diversifying reserves into gold and other currencies), and partly structural (China’s trade surplus with the U.S. has shrunk, reducing the flow of dollars that need recycling). Japan, by contrast, has maintained holdings around $1.1 trillion, though it dipped to $980 billion in late 2024 before recovering.

The gap left by Chinese selling has been filled by a diverse coalition of foreign buyers: European institutions purchasing through custodial accounts in Luxembourg and Ireland, Middle Eastern sovereign wealth funds in the Caymans, and central banks in smaller Asian economies. But the character of foreign buying has changed. Central bank buyers are price-insensitive — they buy Treasuries regardless of yield, for reserve management purposes. The new marginal foreign buyers are price-sensitive private institutions that demand higher yields to compensate for currency risk and duration. This shift helps explain why Treasury yields have stayed elevated even as the Fed has cut rates — the price-insensitive buyers are selling, and the price-sensitive buyers need to be paid more.

The most important trend in this table is the dominance of private investors. In 2000, they held $2.9 trillion — roughly 44% of the total. By 2025, they hold $26.6 trillion — 69%. They absorbed the COVID-era issuance, they filled the gap left by the Fed’s QT, and they stepped in as China stepped back. The U.S. Treasury market is, increasingly, a domestic private market. This has implications: it means the debt is less vulnerable to foreign political decisions (China selling won’t crash the market) but more sensitive to domestic financial conditions (a stock market crash that impairs pension fund assets could reduce Treasury demand exactly when the government needs it most).