Dollar Dependency — What Happens If It Ends

The mechanism is deceptively simple. Because central banks, sovereign wealth funds, and multinational corporations around the world need to hold dollars — for trade settlement, reserve management, and commodity pricing — there is perpetual structural demand for US dollar-denominated assets. That demand allows the US government to borrow at rates 10–30 basis points lower than it otherwise would [3]. ◈ Strong Evidence Ten basis points sounds trivial. Applied to $29 trillion in publicly held federal debt, it is not.

The privilege extends far beyond government borrowing. American corporations issue dollar-denominated bonds at rates their European and Asian competitors cannot match. American consumers finance homes with 30-year fixed-rate mortgages — a product that exists in virtually no other country — partly because the deep, liquid market for mortgage-backed securities depends on global dollar demand. The United States ran a goods trade deficit of over $1 trillion in 2025, importing far more than it exports, yet faced no currency crisis [2]. ✓ Established Any other country running deficits of that magnitude would face capital flight, currency depreciation, and an IMF intervention. The United States does not, because the world needs its currency.

As of Q2 2025, the dollar constituted 56.3% of global foreign exchange reserves — down from a peak of 72% in 2001, but still more than three times the share of the euro, its nearest competitor [1]. ✓ Established Fact The dollar is used in approximately 90% of all foreign exchange transactions and 48% of SWIFT payment messages [2]. It invoices 74% of trade in Asia and 96% of trade in the Americas [2]. ✓ Established Fact This is not merely dominance — it is infrastructure.

The one estimate that best captures the scale of the privilege comes from the Atlantic Council: reserve-currency status increases the sustainable level of US government debt by approximately 22% [4]. ◈ Strong Evidence In practical terms, that means the United States can carry roughly $6.4 trillion more in debt than a comparable economy without reserve-currency status. Remove that privilege, and the maths of American public finance change overnight.

The question is whether this invisible subsidy is sustainable. The dollar's reserve share has been declining for a quarter of a century. Central banks are buying gold at rates not seen since the collapse of Bretton Woods. The weaponisation of the dollar through sanctions and tariffs is eroding the trust that underpins the entire system. And the United States is on a fiscal trajectory that the Congressional Budget Office describes, with characteristic understatement, as "unsustainable" [5].

None of this means the dollar is about to be dethroned. But it does mean that the subsidy Americans have enjoyed for eighty years — cheaper borrowing, affordable imports, the ability to live beyond the nation's productive means — is no longer guaranteed. Understanding what that subsidy is, how it works, and what happens if it erodes is no longer an academic exercise. It is a household-budget question.

Before the First World War, the US dollar was a provincial currency. The pound sterling dominated international trade and reserves, backed by the British Empire's commercial networks and the credibility of the Bank of England. As late as 1928, central banks held twice as many reserves in sterling as in dollars [8]. ✓ Established Fact Two world wars changed everything. Britain emerged from 1945 effectively bankrupt — its foreign reserves exhausted, its empire dissolving, its industrial base damaged. The dollar stepped into the vacuum.

The Bretton Woods Agreement of 1944 formalised what the war had already decided. Forty-four allied nations agreed to peg their currencies to the US dollar, which was itself convertible to gold at $35 per ounce. The arrangement gave the world a stable monetary anchor and gave the United States extraordinary power: it became the sole issuer of the global reserve currency, able to print the money other nations needed for trade and reserves [13]. ✓ Established Fact

The system held for twenty-seven years, until Richard Nixon closed the gold window on 15 August 1971. The immediate trigger was foreign central banks — led by France — demanding gold for their dollar holdings, draining US reserves. But the deeper cause was the contradiction identified by Belgian-American economist Robert Triffin in the 1960s: a reserve-currency country must run trade deficits to supply the world with its currency, but persistent deficits eventually undermine confidence in that currency [13]. ◈ Strong Evidence The Triffin dilemma is not a historical curiosity — it is the structural fault line beneath dollar dominance to this day.

After the gold window closed, the dollar needed a new anchor. It found one in oil. In 1974, the United States and Saudi Arabia struck a bargain: Saudi Arabia would price all its oil exports in dollars and invest its surplus revenues in US Treasury securities. In exchange, the United States would guarantee Saudi security [15]. Other OPEC members followed. The "petrodollar" system meant that every country needing to buy oil — which is to say, every industrialised country — needed dollars first. This created a permanent baseline of global dollar demand independent of US economic performance.

The arrangement endured for half a century. In June 2024, Saudi Arabia declined to renew the petrodollar agreement, opening the door to oil sales in renminbi, euros, and other currencies [15]. ✓ Established Fact The practical impact has been modest so far — most oil is still traded in dollars — but the symbolic significance is considerable. The petrodollar was not merely an economic arrangement; it was a security guarantee. Its expiration signals that the geopolitical bargains underpinning dollar dominance are no longer automatic.

The historical pattern is instructive. Sterling's decline as a reserve currency took decades, not years. In the 1950s, 55% of global reserves were still held in sterling; by the early 1970s, that figure had fallen to 10% [8]. The decline was not linear — it accelerated during periods of fiscal stress and geopolitical upheaval, and slowed during periods of relative stability. As Eichengreen observed, "Sterling lost its position as an international currency because Britain lost its great-power status, not the other way around" [8].

That observation cuts both ways. If dollar decline follows economic decline, then the relevant question is not what BRICS is doing — it is what the United States is doing to itself.

The mechanics of the privilege operate through several reinforcing channels. The most direct is the borrowing-cost discount. Because global investors — central banks, pension funds, sovereign wealth funds — must hold dollar-denominated assets for trade settlement, reserves, and safety, demand for US Treasuries is structurally elevated. This persistent bid lowers yields by an estimated 10–30 basis points compared to what the US would pay as a non-reserve issuer [3]. ◈ Strong Evidence On $29 trillion in publicly held debt, even 10 basis points represents $29 billion in annual savings. At 30 basis points, the saving approaches $87 billion.

The second channel is seigniorage — the profit from issuing currency that others hold. Approximately $950 billion in physical US currency circulates outside the United States, effectively an interest-free loan from the rest of the world to the American economy [2]. ✓ Established Fact Foreign governments and individuals hold these dollars for safety, convenience, and because many economies are partially dollarised. The US prints the paper; the world stores the value.

The third channel is the asymmetric return on international investment. The United States consistently earns higher returns on its foreign assets than it pays on its foreign liabilities — a phenomenon economists call the "return privilege." American investors hold riskier, higher-yielding foreign assets (equities, FDI), while foreigners hold safer, lower-yielding American assets (Treasuries, agency bonds). The net effect is that the US runs a positive income balance on its international investment position even though it is the world's largest net debtor [3]. ◈ Strong Evidence

The fourth channel — often overlooked — is the trade-deficit privilege. The Triffin dilemma means the US must run trade deficits to supply dollars to the world. But because those deficits are denominated in its own currency, the US never faces the balance-of-payments crises that force other deficit countries into austerity. Argentina, Turkey, and Pakistan have all experienced the consequences of running deficits they could not finance in their own currencies. The United States has not, because the world's demand for dollars effectively finances the deficit automatically [13].

What does this look like for an ordinary American household? The 30-year fixed-rate mortgage — the foundation of American homeownership — exists because of the depth and liquidity of the US bond market, which in turn depends on global dollar demand. If the dollar's reserve share declined significantly, mortgage rates would rise. The Atlantic Council estimates that a loss of reserve status could increase borrowing costs across the economy, affecting everything from car loans to small-business credit [4].

The privilege also suppresses import prices. Because the dollar is perennially in demand, its exchange rate is structurally higher than it would otherwise be. This makes imported goods — electronics, clothing, food, oil — cheaper for American consumers. A significant depreciation of the dollar would function as a de facto tax on every imported item on every Walmart shelf.

The CFA Institute's global survey of investment professionals found that a majority believe the dollar will remain the dominant reserve currency for at least another decade, but expect gradual erosion — with gold and the renminbi as the primary beneficiaries [12]. ◈ Strong Evidence The consensus, in other words, is not that the privilege will vanish — but that it will shrink. And shrinkage has costs.

The most dramatic blow came on 26 February 2022, when the United States and its allies froze approximately $300 billion in Russian central bank reserves — roughly half of Russia's total foreign-exchange holdings [10]. ✓ Established Fact The action was unprecedented: G20 members seized the official reserves of another G20 state. The message to every central banker in the developing world was unmistakable — if your reserves can be frozen with a keystroke, they are not really yours.

The sanctions achieved their immediate objective. Russia was cut off from the bulk of its foreign reserves and excluded from SWIFT, the messaging system that underpins international bank transfers. But the second-order effects may prove more consequential than the first. Central banks from New Delhi to Riyadh to Brasília took note. If the dollar system could be weaponised against a major economy, it could be weaponised against anyone [10]. ◈ Strong Evidence

The response has been institutional, not rhetorical. China's Cross-Border Interbank Payment System (CIPS) processed $17 trillion in transactions in 2023 — a 27% increase year-on-year — with over 1,600 direct and indirect participants [6]. ✓ Established Fact Russia's SPFS (System for Transfer of Financial Messages) has connected 25 countries with 177 foreign institutions [6]. These are not yet competitors to SWIFT — which processes over $150 trillion annually — but they are functional alternatives for countries seeking to insulate themselves from dollar-system risk.

The bilateral de-dollarisation between Russia and China is the most advanced example. Over 95% of bilateral trade between the two countries is now settled in local currencies — the renminbi and the rouble — bypassing the dollar entirely [6]. ✓ Established Fact This is not symbolic — Russia-China bilateral trade exceeded $240 billion in 2024, making it one of the world's largest non-dollar trade corridors.

The tariff dimension adds a new vector of erosion. Trump-era tariffs — expanded significantly in 2025 — reduce US goods imports, which in turn reduces the supply of dollars flowing abroad. This is the mechanism through which the world acquires dollars: Americans buy foreign goods, paying in dollars that then circulate globally. Shrink imports, and you shrink the dollar supply that underpins reserve demand [11]. ◈ Strong Evidence An OMFIF survey of 75 central banks found that respondents plan gradual diversification away from the dollar in coming years [11].

The trust deficit is not limited to adversaries. When the United States threatens tariffs on allies — Denmark, Norway, Germany, the United Kingdom — to extract geopolitical concessions unrelated to trade, it signals that the dollar system serves American interests, not global stability [15]. Experts at Columbia University's Center on Global Energy Policy have warned that Trump's return to office created "a genuine threat to the dollar's status for the first time in generations" [15]. ◈ Strong Evidence

The dollar still accounts for 48% of SWIFT transactions — actually an increase since 2014 [2]. ✓ Established Fact The renminbi's share of SWIFT payments has plateaued at approximately 2% [14]. These numbers tell a story of resilience, not collapse. But they also tell a story of complacency. The pound sterling maintained a significant reserve share for decades after the underlying economic conditions had shifted — a phenomenon one academic paper described as "zombie international currency" status. The question is whether the dollar is following the same trajectory: still dominant by inertia, but increasingly vulnerable to a shock.

Net gold acquisitions by central banks surpassed 1,000 tonnes annually in 2022, 2023, and 2024, representing the most sustained period of institutional gold accumulation in over fifty years [7]. ✓ Established Fact The pace doubled compared to the prior decade. By Q3 2025, central banks had added a further 634 tonnes year-to-date [7]. This is not speculative enthusiasm — it is institutional hedging against dollar risk.

China has been the most aggressive buyer. The People's Bank of China added to its holdings for seven consecutive months through May 2025, reaching 2,296 tonnes [7]. ✓ Established Fact Russia — barred from most dollar-denominated assets by sanctions — has increased its reserves to 2,329 tonnes, positioning it fifth globally [7]. But the buying is not limited to US adversaries. Poland, India, Turkey, and Singapore have all made significant purchases, suggesting that de-dollarisation hedging has become mainstream central-bank practice, not a geopolitical statement.

The World Gold Council's 2025 Central Bank Gold Reserves survey — conducted between February and May — revealed that 95% of participating central banks anticipate an increase in global gold reserves, with a record 43% planning to increase their own holdings [7]. ◈ Strong Evidence The motivation is explicit: gold has no counterparty risk. It cannot be frozen, sanctioned, or devalued by another government's policy decisions. In the post-2022 world, that matters.

The correlation between the Russian reserve freeze and the gold-buying surge is not subtle. Central bank gold purchases roughly doubled after February 2022 [7]. A Federal Reserve research paper acknowledged that many emerging-market central banks are quietly diversifying reserves "as insurance against political exposure" [10]. The diplomatic language obscures a blunt calculation: if the United States can seize your reserves, holding fewer dollar reserves is prudent risk management.

China's strategy is the most deliberate. Beijing is simultaneously building gold reserves, expanding CIPS, promoting renminbi-denominated trade settlement within BRICS, and reducing its holdings of US Treasuries. China reduced its Treasury holdings by $86 billion between November 2024 and November 2025 — continuing a multiyear drawdown from a peak of over $1.3 trillion [9]. ✓ Established Fact The strategy is not to topple the dollar overnight — it is to build alternatives so that China has options if the dollar system is weaponised against it.

The BRICS dimension is frequently overstated. The July 2025 summit in Rio de Janeiro produced no concrete progress toward a shared currency, and the final declaration contained no mention of coordinated de-dollarisation [14]. ✓ Established Fact BRICS members have wildly divergent economic interests — India and China are geopolitical rivals, Brazil's economy is deeply integrated with the dollar system, and South Africa's economy is too small to drive monetary-system change. De-dollarisation is proceeding bilaterally, not multilaterally. It is pragmatic, not ideological.

Federal debt held by the public reached 99.8% of GDP in 2025 — effectively matching the historical peak set immediately after the Second World War [5]. ✓ Established Fact But the post-war debt was accumulated to defeat Nazi Germany and Imperial Japan, and was rapidly reduced by a booming economy and moderate inflation. Today's debt is the product of persistent structural deficits — averaging 6.3% of GDP over the next thirty years, more than one and a half times the fifty-year historical average [5].

The CBO projects that debt held by the public will reach 156% of GDP by 2055 [5]. ✓ Established Fact That number exceeds anything in American history and places the US in territory currently occupied by Japan (whose debt is held almost entirely domestically) and Italy (which does not issue the world's reserve currency). The comparison matters: Japan and Italy face domestic fiscal pain. The United States faces domestic fiscal pain plus the potential loss of the external privilege that has allowed it to carry unsustainable debt without a crisis.

The most alarming number in the CBO report is not the debt itself — it is the interest. Net interest payments on the federal debt exceeded $1 trillion for the first time in fiscal year 2025, reaching 3.2% of GDP [5]. ✓ Established Fact By 2055, the CBO projects interest costs will consume 5.4% of GDP and 28% of all federal revenues [5]. At that point, the US government will spend more on interest than on defence, Medicare, or any single programme other than Social Security.

The interaction between fiscal trajectory and reserve-currency status creates a potential doom loop. If global confidence in the dollar erodes, demand for Treasuries declines, interest rates rise, debt-service costs increase, the fiscal position worsens, and confidence erodes further. The CBO acknowledges that "large and growing debt would slow economic growth, push up interest payments to foreign holders of US debt, and pose significant risks to the fiscal and economic outlook" [5]. Crucially, the CBO adds that no specific "tipping point can be identified at which the debt-to-GDP ratio would become so high that it would make a crisis likely or imminent" — which is both reassuring and deeply unsettling, because it means the risk is real but unpredictable.

Foreign holders currently own $9.4 trillion in US Treasuries — a record high in absolute terms [9]. ✓ Established Fact But the composition is shifting. Japan and China — historically the two largest foreign holders — have both been reducing their positions. Japan holds approximately $1.1 trillion, China approximately $0.8 trillion (down from a peak of $1.3 trillion) [9]. The slack has been taken up by the United Kingdom and Belgium — the latter widely understood to be a custodial centre for other countries' holdings, making the true buyers difficult to identify.

The fiscal dimension is what distinguishes the current moment from previous episodes of de-dollarisation anxiety. In the 1970s and 2000s, concerns about the dollar's future arose during periods of relative fiscal health. Today, the external pressures on the dollar coincide with the worst fiscal trajectory in American history. The combination is not necessarily fatal — the dollar has advantages no competitor can match — but it is unprecedented.

The declinists argue that the trend is unmistakable. The dollar's reserve share has fallen from 72% to 56% in a quarter century. Central banks are buying gold at record rates. The US fiscal trajectory is unsustainable. The weaponisation of the financial system is driving institutional diversification. The question, in this view, is not whether the dollar will lose its singular status — it is how quickly, and whether the transition will be orderly or chaotic [8].

Barry Eichengreen — the most influential academic voice on the subject — occupies a nuanced version of this camp. He argues that the dollar will likely become "first among equals" in a multipolar currency system, rather than being replaced by a single successor. The euro and the renminbi will play larger roles, but neither will dominate. The transition, he argues, can be gradual and need not be destabilising — provided global institutions adapt [8]. ◈ Strong Evidence

The resilience camp points to equally compelling evidence. The dollar's share of SWIFT transactions has actually increased since 2014 [2]. ✓ Established Fact Total foreign holdings of US Treasuries reached a record $9.4 trillion [9]. The renminbi's share of global payments has plateaued at 2% — hardly the trajectory of a successor currency [14]. No alternative offers the depth, liquidity, rule of law, and open capital markets that make the dollar functional as a reserve currency. China's capital controls alone disqualify the renminbi from serious contention in the near term.

Brent Johnson's "Dollar Milkshake Theory" offers a counterintuitive variant of the resilience argument: the dollar may actually strengthen in the short to medium term, precisely because global dollar-denominated debt forces foreign borrowers to acquire dollars to service their obligations. The demand for dollars to repay debt acts as a "straw" sucking liquidity from other economies — strengthening the dollar even as the US fiscal position deteriorates [12]. ⚖ Contested

The collapse camp — the smallest but most vocal — argues that a sudden loss of confidence could trigger a non-linear event. If foreign holders began selling Treasuries en masse, yields would spike, the dollar would plunge, and the feedback loop between rising interest costs and declining confidence could be self-reinforcing. This scenario is considered unlikely by mainstream analysts, but the CBO's own observation — that "no tipping point can be identified" — implicitly acknowledges that such a threshold could exist, and that we would not recognise it until after it had been crossed [5].

The most honest assessment is probably the least satisfying. The dollar is not about to be replaced — there is no viable alternative. But it is being slowly, quietly, systematically de-risked by the very institutions that sustain it. Central banks are not dumping dollars; they are hedging. The distinction matters, because hedging can be reversed if trust is restored. The question is whether anything in current US fiscal and foreign policy trajectory suggests that restoration is likely.

Start with mortgages. The 30-year fixed-rate mortgage is an American anomaly — a product that exists in virtually no other developed country. Canadian mortgages typically reset every five years. British mortgages reset every two to five years. The American version exists because of the extraordinary depth and liquidity of the US bond market, which depends in part on global demand for dollar-denominated assets [4]. If dollar demand weakened significantly, mortgage rates would rise. A 100-basis-point increase in the 30-year mortgage rate adds approximately $180 per month to the payment on a $400,000 home — $2,160 per year, borne by the borrower.

Then there are consumer imports. The dollar's structural overvaluation — a consequence of global reserve demand — makes imported goods cheaper. Electronics, clothing, food, automobiles, and consumer products are all cheaper in the United States than their production costs would suggest, because the dollar buys more on international markets than a non-reserve currency would. A significant dollar depreciation would function as a regressive consumption tax, hitting lower-income households hardest because they spend a larger share of income on imported goods [15].

Credit-card rates, auto loans, and small-business lending all benefit from the broader borrowing-cost discount that reserve-currency status provides. The 10–30 basis-point discount on government debt flows through the entire credit system, because government bond yields serve as the benchmark for private-sector borrowing. When Treasury yields rise, everything else rises with them [3].

Savers and retirees face a different set of risks. Much of American retirement wealth is held in dollar-denominated assets — 401(k) plans, Treasury bonds, money-market funds. A gradual erosion of the dollar's international purchasing power would not show up as a dramatic crash but as a slow loss of real value. The $500,000 retirement fund that buys a comfortable retirement in 2026 might buy a significantly less comfortable one in 2046 if the dollar's structural advantages have diminished [4].

The tariff dimension compounds the problem. Trump's tariff policies — which impose an average burden of approximately $1,500 per household per year — simultaneously raise consumer prices and reduce the supply of dollars flowing abroad [15]. ✓ Established Fact The first effect is immediate pain. The second is structural erosion of the mechanism that sustains reserve-currency demand. Americans are paying more for imports today while the policy simultaneously undermines the system that has kept imports cheap for eighty years.

International diversification — holding assets in euros, yen, Swiss francs, gold, or other currencies — is a rational hedge, but it is impractical for most American households. The average saver does not have a brokerage account with international access. The average retiree cannot easily shift a 401(k) into foreign assets. The privilege has been democratised — everyone benefits — but the risk is not equally hedgeable. The Americans most dependent on dollar stability are the Americans least equipped to hedge against its erosion.

The most likely scenario is not a dramatic collapse of dollar status but a gradual erosion of the privilege — what Eichengreen describes as a transition from singular dominance to "first among equals." That transition might unfold over decades, and it need not be catastrophic. But even gradual erosion has compound effects. A slow increase in borrowing costs, a persistent weakening of import purchasing power, a steady decline in the real value of dollar-denominated savings — these do not make headlines, but they reshape the economic landscape in which American families make every significant financial decision.

The dollar's reserve-currency status has been the invisible floor beneath American prosperity for eighty years. Most Americans have never thought about it, because they have never had to. That may be changing. The floor is not collapsing — but it is, for the first time in living memory, visibly cracking. Whether those cracks are repaired or allowed to widen is not a question of monetary policy. It is a question of fiscal discipline, geopolitical judgment, and institutional trust — all of which are currently in shorter supply than the world's appetite for dollar-denominated assets.