America’s Debt Just Passed $40 Trillion. Here’s What Investors Should Actually Worry About

The United States has crossed another fiscal milestone that would have seemed extraordinary not long ago. Federal debt has now surpassed $40 trillion, while the government continues running annual deficits large enough to require enormous amounts of additional borrowing. At the same time, Treasury is expanding purchases of some of its own outstanding bonds, stablecoin issuers are becoming a growing source of demand for short-term government debt, and investors are once again debating whether persistent deficits ultimately mean higher inflation, higher interest rates or a weaker dollar.

It is tempting to combine all of those developments into a simple narrative: Washington is borrowing too much, printing money to pay its bills and buying back its own debt to keep the system functioning. Parts of that story identify genuine risks, particularly the enormous fiscal deficits and rapidly rising interest expense. Other parts confuse Treasury debt management with Federal Reserve monetary policy and make the situation sound more immediately catastrophic than the evidence supports.

The more useful question for investors is not whether the United States is about to run out of money. It is how a heavily indebted federal government changes interest rates, Treasury issuance, inflation risk and the relative attractiveness of different assets. That shift is already happening, and investors do not need to predict a sovereign-debt crisis to feel its effects.

The $40 Trillion Number Is Real, but the Deficit Matters More Day to Day

The national debt represents accumulated federal borrowing over many years rather than one enormous bill suddenly coming due. Treasury finances that debt by issuing securities ranging from short-term bills to notes and long-term bonds, which are owned by U.S. households, financial institutions, pension funds, mutual funds, foreign investors and other entities. Treasury’s daily Debt to the Penny data tracks both debt held by the public and intragovernmental holdings, such as Treasury securities held by federal trust funds.

The annual deficit explains why that debt keeps growing. In fiscal 2025, the federal government collected approximately $5.235 trillion while spending about $7.010 trillion, producing a deficit of roughly $1.775 trillion. CBO put the deficit at about 5.8% of gross domestic product, significantly above the 50-year average even though the economy was not in a conventional recession.

One correction is important when discussing where that federal revenue comes from. Individual income taxes, payroll taxes, corporate income taxes, customs duties and other federal receipts finance Washington, but property and general sales taxes are primarily state and local revenue sources rather than major sources of federal revenue. In 2025, federal receipts totaled $5.2 trillion, with individual income taxes alone accounting for more than half.

Running a deficit is not inherently evidence of fiscal collapse. Governments commonly borrow during recessions, wars, emergencies and periods of major public investment, but consistently large deficits during comparatively normal economic conditions cause the debt stock to compound. The problem becomes increasingly important when the interest required to carry that debt begins consuming money that could otherwise finance government programs or reduce taxes.

Interest Is Becoming One of Washington’s Largest Expenses

The cost of the national debt depends not only on how much the government owes but on the interest rates attached to that debt. For years after the financial crisis, Washington benefited from extraordinarily low borrowing costs, allowing debt to rise without interest expense increasing proportionally. That advantage has weakened as securities mature and are refinanced at higher rates.

Net federal interest outlays reached $970 billion in fiscal 2025, according to CBO. Interest expense was already larger than defense outlays under CBO’s budget comparison, and CBO projects net interest costs to reach about $1 trillion in 2026. By 2036, its baseline has those costs exceeding $2 trillion annually.

This refinancing process occurs gradually because Treasury does not refinance all $40 trillion at the same time. Securities mature continually, and new borrowing is issued to replace maturing debt as well as finance current deficits. When older securities carrying relatively inexpensive coupons are replaced by debt issued at higher prevailing rates, the government’s average borrowing cost rises.

That is the fiscal problem investors should watch more closely than the symbolic debt number itself. A growing interest bill can place pressure on future budgets, while expectations of persistent Treasury issuance can influence long-term yields. The government does not need to default for high debt to matter; substantially higher interest expense can alter fiscal choices years before anything resembling a crisis occurs.

Treasury Is Buying Back Bonds, but This Is Not a New September Bailout

Treasury did announce a significant change for September 2026, but the description that the government is only now beginning to buy back its debt is incorrect. Treasury reintroduced regular buybacks in 2024, primarily for liquidity support and cash management. The new development is that Treasury announced on August 19 that it would at least double the maximum size of certain long-dated liquidity-support buybacks, from $2 billion to at least $4 billion per operation, beginning September 9.

For the current refunding quarter, Treasury said it could purchase as much as $38 billion of older, less-liquid securities for liquidity support and another $25 billion in securities with maturities between one month and two years for cash-management purposes. Treasury described the larger long-bond operations as an effort to improve market liquidity in portions of the curve where it was receiving substantial offers from market participants.

A Treasury buyback therefore should not be confused with the government somehow extinguishing the national debt using money it created for itself. Treasury can buy one security while continuing to issue other securities to finance government operations and manage the maturity structure of the overall debt. In practical terms, it can replace less-liquid older securities with more liquid benchmark issues or alter the timing of cash needs.

The increase has nevertheless attracted scrutiny because investors are sensitive to anything that appears designed to influence long-term borrowing costs. Treasury Secretary Scott Bessent has argued that the expanded operations are intended to support orderly markets rather than artificially suppress yields, while critics worry that increasingly active debt management could blur the line between liquidity management and attempts to influence market pricing.

Treasury Cannot Simply Become Its Own Lender

Another misleading explanation is that Washington plans to issue short-term debt, use the proceeds to buy long-term debt and thereby become its own lender. Treasury can change the maturity composition of federal debt, but selling one Treasury security to obtain the cash used to retire another does not eliminate the government’s liability. It exchanges one form of borrowing for another.

Increasing reliance on Treasury bills can have advantages. Short-term securities often have deep demand from money-market funds, banks, corporations and other investors seeking liquid assets, and bills give Treasury flexibility in managing cash. The disadvantage is refinancing risk because short-maturity debt must be rolled over much more frequently.

If interest rates decline, that can work in Treasury’s favor because new bills refinance at lower rates relatively quickly. If rates rise or investors demand a larger premium, the opposite occurs and financing costs reset much faster. A government that shifts heavily toward short-term borrowing therefore becomes more exposed to changes in prevailing interest rates.

That maturity tradeoff matters far more than the idea that the government is somehow lending money to itself. Treasury is managing who lends to the United States, at what maturity and at what price, while the underlying obligation remains federal debt.

The Federal Reserve Is Not Directly Printing Money to Pay Treasury Bills

The biggest technical error in many discussions of federal debt concerns the Federal Reserve. The Fed can create central-bank reserves when it purchases financial assets, which is one reason quantitative easing is often described colloquially as “printing money.” It does not, however, directly purchase newly issued Treasury securities from the government to fund the federal deficit.

The Federal Reserve explicitly states that it purchases Treasury securities already held by the public through open-market operations. It does not participate competitively in Treasury auctions, and the Fed says its purchases are monetary-policy decisions made independently of Treasury’s borrowing decisions rather than a mechanism for financing federal deficits.

That distinction does not mean monetary policy is irrelevant to federal finance. Large-scale Fed purchases can increase demand for Treasury securities in secondary markets, affect financial conditions and place downward pressure on longer-term interest rates. Conversely, reductions in the Fed’s securities portfolio remove a significant source of demand from the market and can affect liquidity and yields.

The concern about inflation is therefore more complicated than “the government prints every dollar it borrows.” Inflation can result when aggregate demand persistently exceeds the economy’s productive capacity, and monetary policy, fiscal spending, supply constraints and expectations can all contribute. Large deficits can create inflationary pressure under some conditions, but issuing a Treasury bond does not mechanically create an equivalent amount of new money.

Stablecoins Are Becoming a New Buyer of Treasury Bills

One of the more interesting developments in government finance is coming from an industry that barely existed during the last major debt debate. Dollar-backed stablecoin issuers need large quantities of liquid, high-quality assets to support tokens designed to maintain a value of $1, and short-term U.S. Treasury securities are particularly well suited to that job.

The GENIUS Act, signed into law in July 2025, established a federal framework for payment stablecoins and reserve requirements. Treasury Secretary Bessent explicitly argued when the legislation was enacted that growth in regulated dollar stablecoins could create substantial additional demand for U.S. Treasuries used to back those tokens.

That makes the crypto industry an unusual participant in Treasury finance. Stablecoins were created partly to allow digital assets to operate outside traditional banking infrastructure, yet their growth can result in billions of dollars flowing back into one of the most traditional assets in finance: short-term U.S. government debt.

For Treasury, that demand is potentially useful because it creates another structural buyer for bills. For the broader financial system, the implications are more complicated because regulators and international institutions continue debating whether large stablecoin markets could shift deposits away from banks or create new financial-stability risks. Even supporters should therefore distinguish between stablecoins increasing demand for Treasury bills and stablecoins somehow solving America’s long-term deficit problem.

Short-Term Treasuries Have Become an Investment Again

For individual investors, one immediate consequence of higher government borrowing costs is positive: Treasury bills once again provide meaningful income. Investors spent much of the post-2008 period receiving negligible yields on cash-like government securities, making stocks and longer-duration bonds relatively more attractive.

As of August 27, the iShares 0-3 Month Treasury Bond ETF, SGOV, reported a 30-day SEC yield of 3.61% and a 0.09% expense ratio. The fund holds U.S. Treasury securities with maturities of three months or less, providing investors with a convenient way to maintain short-duration government exposure without repeatedly purchasing individual bills.

Treasury interest also receives favorable state and local tax treatment compared with ordinary bank interest, although ETF taxation can require attention to the percentage of distributions derived from qualifying Treasury obligations. That can make Treasury securities particularly attractive to higher-income investors living in states with meaningful income taxes.

The tradeoff is reinvestment risk. A short-term Treasury strategy benefits while yields remain elevated, but income can fall quickly if monetary policy eventually pushes short-term rates lower. Investors using bills as long-term investments should therefore recognize that today’s yield is not locked in for the next decade.

Long-Term Bonds Are Telling a Different Story

Short-term Treasury demand can remain strong even while investors become more cautious about committing money for 20 or 30 years. A bill investor receives principal back quickly and can reinvest at whatever rate prevails, while a long-term bond investor commits capital to a fixed payment structure that can lose substantial market value when inflation expectations or yields increase.

That tension became particularly visible at the end of August. On September 1, the U.S. 10-year Treasury yield was around 4.79% and the 30-year yield reached roughly 5.27% amid a broader global bond selloff. Investors were responding to several forces, including inflation concerns, geopolitical risk and increasingly heavy global demand for capital.

High long-term yields do not necessarily mean investors have “lost faith” in the United States. Yields incorporate expectations for inflation, future short-term interest rates, economic growth and compensation for holding long-duration assets. A strong economy can actually push yields higher if investors expect tighter monetary policy or attractive competing investments elsewhere.

Persistent fiscal deficits can still add pressure because Treasury must continually bring enormous quantities of securities to market. When the supply of bonds rises faster than investor demand at existing prices, yields may need to rise to attract buyers. That is one channel through which federal fiscal policy can eventually affect mortgages, businesses and investment valuations even without anything approaching a Treasury default.

Higher Treasury Yields Eventually Reach Ordinary Borrowers

Treasury securities provide the foundation for pricing much of the financial system. Mortgage rates do not move mechanically with the 10-year Treasury every day, but government yields are an important benchmark because lenders compare the return from mortgages and other loans with the return available from relatively low-credit-risk Treasury securities.

Higher government borrowing costs can therefore contribute to higher required yields on corporate bonds, mortgages and other forms of credit. Auto loans and credit cards are affected more directly by other benchmarks and borrower credit risk, but broad periods of higher interest rates tend to increase financing costs across the economy.

That creates one of the less dramatic but more realistic risks from persistently high federal debt. The danger does not require investors suddenly refusing to lend to Washington. If Treasury has to offer structurally higher yields to clear an enormous supply of debt, the cost of capital throughout the economy can remain higher as well.

For households, the result can show up as a more expensive mortgage. For corporations, it can mean fewer projects generate adequate returns after financing costs. Over long periods, that can slow investment and economic growth without producing the spectacular “debt collapse” that dominates social-media discussions.

Cutting $2 Trillion Would Not Automatically Shrink GDP by 6.5%

The other side of the debt debate frequently becomes overly simplistic as well. If the government spends roughly $2 trillion less, it does not follow mechanically that GDP must immediately shrink by the same $2 trillion. Government expenditures are part of GDP, but the economic effect of fiscal changes depends on what spending is reduced, how quickly the reduction occurs and what households and businesses do in response.

Cutting transfers has different effects from cutting infrastructure investment. Reducing spending while simultaneously reducing borrowing can affect interest rates and private investment, while tax changes can alter household consumption. Economists therefore use fiscal multipliers rather than assuming that every dollar of federal spending produces exactly one dollar of permanent economic output.

There is still a genuine danger in trying to close a roughly $1.8 trillion deficit overnight. Abrupt tax increases or spending reductions of that magnitude could weaken demand significantly and potentially contribute to recession. That practical difficulty is one reason fiscal imbalances can persist even after lawmakers broadly agree that debt growth is unsustainable.

The challenge is not that reducing deficits is impossible. It is that stabilizing the debt generally requires politically difficult choices involving taxes, major entitlement programs and discretionary spending, and making those adjustments gradually is economically easier than waiting until financial markets force rapid action.

America Is Not Currently in a Debt Death Spiral

Investors should also be careful with the phrase “debt death spiral.” A true sovereign-debt spiral occurs when rising borrowing costs increase deficits, which requires still more borrowing, which pushes rates higher again until lenders begin questioning the government’s capacity or willingness to repay.

The United States has characteristics that substantially reduce immediate default risk. Treasury debt is denominated in dollars, the United States controls its own currency, the Treasury market remains one of the largest and most liquid financial markets in the world, and the dollar continues to play a central role in global finance. None of those advantages means debt can increase without economic consequences.

The risk is better described as fiscal deterioration rather than imminent insolvency. CBO projects net interest costs increasing from roughly $1 trillion in 2026 to $2.1 trillion in 2036 under current-law assumptions, illustrating how borrowing can consume a progressively larger share of federal resources even without a crisis.

A default caused by political failure to authorize payments would be enormously disruptive, but it is different from the United States mathematically running out of dollars. Investors should distinguish political default risk, inflation risk, interest-rate risk and long-term fiscal sustainability because each affects portfolios differently.

Gold and Bitcoin Are Not Automatic Winners From Federal Debt

Rising concern over fiscal deficits has revived the “debasement trade,” the idea that investors should own assets whose supply cannot be increased easily. Gold is the traditional example, while Bitcoin has increasingly been placed in the same category because its issuance is governed by a predetermined protocol.

There is a legitimate investment case for holding assets that behave differently from stocks, bonds and cash. Gold has historically performed well during some periods of inflation, geopolitical stress and declining confidence in monetary stability, while Bitcoin’s fixed maximum supply gives supporters a reason to view it as protection against currency debasement. Neither asset, however, reliably moves upward every time federal debt increases.

Bitcoin remains highly volatile and can fall sharply during periods when inflation fears are rising. Gold can experience long stretches of disappointing returns, and silver combines monetary characteristics with significant industrial-demand exposure. Real estate can provide some inflation protection but brings interest-rate sensitivity, property expenses and illiquidity.

Debt anxiety is therefore a weak reason to abandon a diversified portfolio and make a concentrated bet on one supposed inflation hedge. A better approach is to understand what risk each asset is intended to address and size the position so that being wrong about the macroeconomic forecast does not damage the entire financial plan.

The Dollar Is Backed by More Than “Faith”

The U.S. dollar has not been convertible into gold at a fixed price for decades, so in that narrow sense it is a fiat currency. Saying it is backed by nothing except faith, however, misses why people and institutions around the world continue accepting it.

The dollar operates within the legal, economic and taxing authority of the United States. Federal taxes are paid in dollars, contracts and debts are overwhelmingly denominated in dollars domestically, and U.S. financial markets provide enormous pools of dollar-denominated assets. The scale of the American economy and the depth of Treasury markets further reinforce international demand.

Confidence still matters because every monetary system depends partly on expectations that currency will retain sufficient purchasing power and remain widely accepted. Persistent inflation or severe fiscal mismanagement could weaken that confidence over time, which is why debt sustainability and Federal Reserve credibility matter.

That is different from saying the dollar collapses once investors discover there is no gold in a vault backing every bill. Modern currencies derive value from a combination of economic capacity, institutions, taxation, legal enforceability, monetary policy and network effects rather than direct convertibility into precious metals.

Investors Should Watch the Price of Government Borrowing

America’s $40 trillion debt is large enough that dismissing it would be as misguided as predicting an immediate financial apocalypse. Federal finances are increasingly constrained by the interaction of persistent deficits and higher interest rates, with net interest already approaching $1 trillion a year and projected to continue rising. Treasury’s decision to increase certain long-bond buybacks beginning in September highlights how important maintaining liquid, orderly government-debt markets has become.

For investors, the opportunities are more practical than sensational. Short-term Treasuries currently offer meaningful yields with relatively little duration risk, while higher long-term rates create potentially attractive bond income for investors willing to tolerate price volatility. Gold, Bitcoin, real estate and equities can play different roles in a diversified portfolio, but none should be purchased on the assumption that $40 trillion of federal debt guarantees runaway inflation or dollar collapse.

The most important signal may ultimately be the interest rate investors demand to keep financing Washington. Debt can continue growing for years if buyers remain willing to absorb Treasury issuance at manageable rates. The situation becomes considerably harder when a larger debt stock collides with higher refinancing costs and investors demand additional compensation for inflation and duration risk.

That process does not need to end in default to matter enormously. Higher federal interest expense can limit future policy choices, while higher Treasury yields can influence mortgages, business investment and asset valuations throughout the economy. The United States still possesses extraordinary borrowing capacity, but borrowing capacity and borrowing without consequence are not the same thing.

The investment opportunity is therefore not to predict the day America’s debt system breaks. It is to recognize that an era of enormous government borrowing and expensive capital creates different winners and losers than the low-rate world investors became accustomed to after 2008. Watching where Treasury must pay more to attract money may tell investors far more than watching the national debt clock itself.