The Nixon Shock and the Collapse of Bretton Woods

Key Takeaways

• The announcement was three policies, not one. The address of 15 August 1971 directed the Treasury Secretary to suspend convertibility of the dollar into gold or other reserve assets, Executive Order 11615 froze prices, rents, wages and salaries for ninety days, and Proclamation 4074 imposed a ten percent supplemental duty on dutiable imports from 12:01 a.m. on 16 August. Accounts that mention only the gold decision describe a third of the package.
• The tariff lasted 126 days. Proclamation 4098 terminated it on 20 December 1971, two days after the Smithsonian Agreement, because removing it was what the United States traded for other countries revaluing their currencies.
• The arithmetic had failed a decade earlier than the announcement. The Federal Reserve's history states that dollar claims outstanding began to exceed the United States gold stock by 1961, and the London Gold Pool that defended the 35 dollar price collapsed in March 1968.
• The pegs broke before Nixon did. Between the April and June 1971 monthly averages the D-mark moved 3.4 percent and the Swiss franc 4.8 percent against the dollar, in a system whose permitted band was one percent either side of parity. That is two months before the address.
• The system did not end that night. The Smithsonian Agreement of December 1971 raised the official gold price to 38 dollars, Congress enacted that par value on 31 March 1972 and replaced it with forty-two and two-ninths dollars on 21 September 1973. Generalized floating arrived in March 1973, nineteen months after the address.
• The freeze worked and then stopped working. The consumer price index rose 0.2 percent across the three months of the ninety-day freeze and 3.3 percent over 1971 as a whole. It then rose 8.7 percent in 1973 and 12.3 percent in 1974.
• One number from 1973 is still live. 31 U.S.C. 5117(b) values gold certificates at 42 and two-ninths dollars a fine troy ounce, so the Treasury's status report for 31 July 2026 carries 261,498,926 fine troy ounces at a book value of 11,041,059,958 dollars.

What Exactly Was Announced on 15 August 1971?

Nixon had spent the weekend of 13 to 15 August at Camp David with fifteen advisers, among them Federal Reserve Chairman Arthur Burns, Treasury Secretary John Connally and the Treasury's Undersecretary for Monetary Affairs, Paul Volcker. What emerged on Sunday evening was one programme aimed at three targets: jobs, the cost of living, and what the address called the attacks of international money speculators.

The monetary sentence is short and worth reading closely. Nixon said he had directed Secretary Connally "to suspend temporarily the convertibility of the dollar into gold or other reserve assets, except in amounts and conditions determined to be in the interest of monetary stability and in the best interests of the United States." Three things are doing work in that sentence. Temporarily was the framing and it never expired. Or other reserve assets closed the side doors as well as the front one. And the exception clause reserved discretion rather than abandoning the mechanism, which is why officials could plausibly spend the next year and a half negotiating as though the system still existed.

The second measure was a freeze. Executive Order 11615, signed the same day, fixed prices, rents, wages and salaries for ninety days at levels no higher than the highest charged in a substantial volume of actual transactions during the thirty-day period ending 14 August 1971, and required every seller to keep those prices available for public inspection. The authority came from the Economic Stabilization Act of 1970.

The third was a tariff. Proclamation 4074 declared a national emergency and imposed a supplemental duty of ten percent ad valorem on dutiable articles entered after 12:01 a.m. on 16 August 1971, capped so the total duty on any article could not exceed the rate in the second, non-agreement column of the tariff schedules. The word dutiable matters: it reached goods that already paid duty, not the whole import bill.

Chronology, from the first crack to the last statute

Dated events in the breakdown of the Bretton Woods par value system. Exchange rates in the following section are monthly averages, so they are placed by month rather than by day.

Read that column from the top and the announcement stops looking like a rupture. Eleven years of defensive machinery precede it and three and a half years of legislative tidying follow. The night of 15 August 1971 is the loudest point on the line, not the beginning or the end of it.

What Was Bretton Woods Designed to Do?

Seven hundred and thirty delegates from forty-four nations met at the Mount Washington Hotel in Bretton Woods, New Hampshire, in July 1944 to design a monetary order for a war that had not yet ended. The problem in front of them was not inflation. It was the interwar experience of competitive devaluation, in which countries cheapened their currencies against each other to grab export share, and the trade barriers that followed.

Two plans competed. John Maynard Keynes, for the British Treasury, wanted a global clearing institution issuing its own reserve asset and penalising surplus countries as well as deficit ones. Harry Dexter White, for the United States Treasury, wanted a fund of national currencies and gold with limited reserve credit. White's design won.

What came out was a two-layer structure. Member currencies were pegged to the dollar within a band of one percent, adjustable only in cases of fundamental disequilibrium. The dollar itself was pegged to gold at 35 dollars a fine ounce. The International Monetary Fund would police the pegs and lend to countries in balance of payments trouble; what became the World Bank Group would finance reconstruction. The IMF came into formal existence in December 1945 when the first twenty-nine members signed the Articles.

The design had a hierarchy inside it that is easy to miss and turns out to be the whole story. Every other country's obligation was to a currency. The United States alone had an obligation to a metal. Everybody else could, in the last resort, be helped by the Fund or by a devaluation negotiated with it. The United States could only be helped by having enough gold.

The system did not become operational until 1958, when the European countries eliminated exchange controls on current-account transactions. That detail is worth holding on to: the full Bretton Woods system, the one remembered as the postwar monetary order, ran as designed for roughly thirteen years before the United States stopped honouring its half of it.

Why Did the Arithmetic Behind the Promise Stop Working?

In the first postwar years the United States held roughly three quarters of the world's official gold reserves, and the international worry was a shortage of dollars rather than a surplus of them. Europe and Japan needed American goods and had nothing to pay with. The United States encouraged those countries to devalue against the dollar so they could earn dollars through exports, which left the dollar deliberately expensive and the United States running payments deficits it was content to run.

That worked as long as foreigners wanted to hold the dollars. Through the 1960s two things changed at once. European and Japanese exports became genuinely competitive, so the pull of American goods weakened. And the stock of foreign-held dollars kept growing, from the payments deficit, from military spending abroad and from American companies investing in Europe, while the world's gold stock grew only marginally.

The trade position turned in the same window, and the timing is closer to the announcement than most accounts allow. The United States current account had been in surplus in every year since the modern quarterly series begins in 1960. It ran a surplus of 2.3 billion dollars in 1970, a deficit of 1.4 billion in 1971 and a deficit of 5.8 billion in 1972. The first annual deficit in the series therefore arrived in the same calendar year as the gold window closing, which is why the address spends as much time on trade competitiveness as on money.

The crossover point is the one date in this story that deserves more attention than 15 August 1971. The Federal Reserve's history places it at 1961: from that year, the amount of dollar claims outstanding began to exceed the United States government's stock of gold. From 1961 onward the promise was, in the strict sense, unbackable. Everyone could not be paid. The system ran for another decade anyway, because a promise only fails when it is tested, and for most of that decade it was politely not tested.

This is the structural point an investor should take from the episode, and it does not require any of the specific institutions to recur. The condition that matters is not whether a claim is fully covered. It is whether the holders of the claim believe they need to find out. A ratio that has been insufficient for ten years can produce no consequence at all, and then produce all of the consequence in a fortnight. The distance between those two states is entirely psychological, which is why watching the coverage ratio tells you about fragility and nothing about timing.

What Was the Triffin Dilemma, and Why Had It No Exit?

Robert Triffin's insight, which the Federal Reserve's own history now presents as the structural flaw in the design, is a genuine contradiction rather than a policy error. It works like this.

World trade grows. Growing trade needs growing reserves, and under Bretton Woods reserves meant dollars, because gold production could not keep pace. The only way the world gets more dollars is for the United States to send more of them abroad than it takes back, which means running a persistent external deficit. But a country running a persistent external deficit is accumulating liabilities against a fixed stock of gold, and the larger those liabilities grow relative to the gold, the less credible its promise to redeem becomes.

So the reserve issuer faces a choice with no correct answer. Stop running the deficit and the world is starved of reserves, which forces deflation or trade restriction on everybody else. Keep running it and the reserve asset eventually becomes untrustworthy. The Federal Reserve's Smithsonian essay states the trap in one line worth keeping: without additional dollar reserves the system was unworkable, and with additional dollar reserves it was unstable.

What makes this useful rather than merely historical is its shape: the thing that makes the asset valuable to hold is the same thing that erodes its ability to be worth holding. That shape recurs wherever an issuer's success at getting its liability widely used increases the size of the claim it has committed to honour on demand, whether the issuer is a government, a bank, a clearing house or the operator of a token that promises redemption at a fixed price.

Which Defences Were Tried Before 1971, and Why Did Each Fail?

The decade between the crossover and the closure was not passive. It was a sequence of increasingly elaborate defences, and their pattern is more instructive than any one of them.

Measures taken to defend dollar convertibility between 1961 and 1971, with what each one was actually addressing.

Look at the fourth column. Every one of these worked, and every one worked by moving the pressure rather than removing it. The Gold Pool held a price by spending the reserve that the price was a claim on. The swap lines held off conversion by turning a gold claim into a currency claim. The two-tier market saved the official price by admitting in public that the private price was different. Capital controls restricted Americans rather than the deficit.

The swap lines carry the clearest tell. What began in March 1962 as a small short-term facility with the Bank of France, nine central banks and 900 million dollars in total by year end, had become a large intermediate-term arrangement by the time the window closed. When an emergency facility grows for nine years and never unwinds, the emergency is not what it is being used for. A backstop whose size only ratchets upward has been repurposed from a bridge into a floor.

Was the Break Visible in Market Data Before August?

Yes, and unusually clearly, because the whole point of a pegged rate is that it does not move. When it moves, that is the signal, and there is nothing to interpret.

Monthly average exchange rates around the break, from the Federal Reserve Bank of St. Louis. The first three columns are units of foreign currency per United States dollar, so a falling number means a weaker dollar. The last is United States dollars per pound sterling, so a falling number means a weaker pound.

Three readings come out of that grid, and only the third is the one usually told.

The European pegs broke in the spring of 1971, months early. Between the April and June averages the D-mark strengthened 3.4 percent against the dollar and the Swiss franc 4.8 percent. The permitted band under the IMF Articles was one percent either side of parity. Whatever those two currencies were doing by early summer, they were not inside the system, and any reader of the wire prices could see it.

The yen was held for another fortnight after the address. The August average is 355.78, only 0.6 percent away from the January figure, in a month whose second half contained the largest monetary announcement in a generation. Then September prints 338.02, five percent lower. A monthly average that refuses to move while the news moves is the signature of an official bid absorbing the flow, and the September step is what it looks like when that bid is withdrawn.

Sterling moved first, and downward. The pound went from 2.5691 dollars in June 1972 to 2.4447 in July, a fall of 4.8 percent, half a year after the Smithsonian and eight months before the general float. Britain's problem was not the dollar's problem, which is why the pound is the one major currency the dollar did not lose ground against across this whole period.

The awkward part is the last reading. In the first seven months of 1971 the yen moved from 358.02 to 357.40, under two tenths of one percent, so anybody watching only the dollar-yen rate saw perfect stability right up to the final fortnight. The information was in a different pair. A pegged system tells you where it is failing, but not necessarily on the instrument you happen to be watching.

Why Was a Wage and Price Freeze Attached to a Monetary Decision?

Because the two halves of the announcement were solving for each other, and separating them is what makes the episode look incoherent.

Consumer prices were up 4.6 percent on the year in August 1971 and unemployment was 6.1 percent, the combination the decade had no framework for. Ending convertibility was expected to push the dollar down, and a lower dollar raises the price of everything imported. The monetary measure alone would therefore have made the domestic problem worse in exactly the month a president with an election fourteen months away could least tolerate it. The freeze was the offsetting instrument.

On its own terms it worked, and the size of the effect is startling. The consumer price index stood at 40.8 in August 1971 and 40.9 in November, when the ninety days ran out: a rise of 0.2 percent over three months. Across 1971 as a whole prices rose 3.3 percent, and across 1972, under the successor programme, 3.4 percent. That is against 5.6 percent in the twelve months to December 1970, before any of it.

Two things were happening at once, and the later argument about the 1970s turns on separating them. Prices were restrained by law. Money was not restrained at all. The effective federal funds rate averaged 3.71 percent in March 1971, rose to 5.57 percent in August, and was back to 3.30 percent by February 1972. In an election year, with prices legally capped, the cost of money was lower than at the trough of the previous recession.

Why the freeze is the interesting half. A price control does not change the quantity of money, the level of demand or the cost of production. It changes what sellers are permitted to write on a label. That makes it a device for altering the measurement of inflation without altering its cause, which is precisely why the measured rate can be excellent for two years and then be terrible very quickly. The freeze bought time. Nothing was done with the time.

The programme did not end in November 1971. It went through further phases, Congress extended the underlying authority to 30 April 1974, and on 13 June 1973 Nixon imposed a second comprehensive freeze for a maximum of sixty days, this time exempting raw agricultural products while covering processed ones. The second freeze is the one that shows the mechanism failing on contact: with farm prices outside the ceiling and processors inside it, the index rose 0.2 percent from June to July and then 1.8 percent in August alone.

For the monetary policy that eventually had to clean this up, see the Volcker disinflation, and for the full arc of the price level from the mid-1960s onward, the Great Inflation.

What Did the Smithsonian Agreement Actually Change?

Four months after the gold window closed, monetary officials from the Group of Ten met at the Smithsonian Institution in Washington and tried to put the system back together. What they attempted was not a transition to floating rates. It was a repair.

Three things changed. The official price of gold went from 35 to 38 dollars an ounce, which the Federal Reserve's history describes as a devaluation of the dollar against gold of approximately 8.5 percent. Other countries revalued their currencies upward against the dollar, producing what the same source puts at roughly a 10.7 percent average devaluation of the dollar against the other key currencies. And the permitted fluctuation bands were widened from the one percent the IMF Articles had specified.

Two things did not change. Convertibility was not restored: the higher gold price was a par value, an accounting standard for the currency, not a reopening of the window. And the fundamental position that had produced the crossover in 1961 was not addressed, because nothing in the agreement altered the underlying flows.

The United States paid for the settlement with the tariff. Proclamation 4098, dated 20 December 1971, recites in its own preamble that a multilateral agreement had been reached among the Group of Ten which permits removal of the surcharge, and terminates the operative paragraphs of Proclamation 4074. The ten percent duty had been in force for 126 days. It was never a trade policy in the ordinary sense; it was a bargaining chip created to be given away, and it was given away as soon as there was something to trade it for.

Congress then had to make the new par value real. The Par Value Modification Act, approved 31 March 1972, directed the Treasury Secretary to establish a new par value of the dollar of, in the statute's own phrasing, one dollar equal to one thirty-eighth of a fine troy ounce of gold. Seven months after the gold window closed, the legislature of the United States was still writing the dollar's value in ounces.

Why Did the Smithsonian Fix Last Only Fifteen Months?

Because it changed the numbers and not the incentives, and everyone involved could see the difference.

A devaluation is only credible if the market believes it was the last one. The Smithsonian settlement changed the dollar's gold price for the first time since the system was designed in 1944, four months after the previous arrangement had been abandoned by unilateral announcement, with no restoration of convertibility and no change to the flows that caused the problem. A holder of dollars had every reason to conclude that a price which could move once could move again, and to act before it did.

The behaviour that followed is the ordinary mechanics of a peg under pressure. Speculators pushed European currencies toward the top of their new, wider bands. Defending the top of a band means the central bank buys dollars, which means printing its own currency to do it, which means importing the inflation it was trying to avoid. Germany and Japan expanded restraints on financial flows. The market price of gold, which by then had a separate private tier, went to around 60 dollars an ounce by mid-1972 and around 90 by early 1973, against a par value that had just been reset to 38.

The last attempt was made on 12 February 1973, with European and Japanese exchanges closed, when the United States announced a further devaluation of about ten percent. It bought roughly a month. When markets reopened, speculation against the dollar became rampant, and by March the major currencies were floating.

A piece of arithmetic buried in the two devaluations explains why accounts quote different numbers for the same event. Going from 38 to forty-two and two-ninths dollars an ounce raises the gold price 11.1 percent and cuts the dollar's gold content by exactly 10 percent, because the two are reciprocals. Neither figure is wrong. The same applies to the first step, where 35 to 38 dollars is 8.6 percent on the gold price and 7.9 percent off the dollar.

Federal Reserve Board trade-weighted nominal dollar index against major currencies, monthly. The series begins in January 1973 and is set to 100 in March 1973, the month the major currencies floated.

That the Federal Reserve chose March 1973 as the base month of its dollar index is not a coincidence, and the shape of the series afterwards is the point. The index fell 11.0 percent between January and July 1973. It then spent the rest of the decade below where it started: through December 1980 its highest monthly reading was 107.76 in December 1976, never regaining the 108.19 of January 1973.

How Far Did the Dollar Actually Fall?

The question has no single answer, and the reason is the most durable practical lesson in the episode.

Against the yen, using monthly averages, the dollar went from 358.02 in January 1971 to 261.90 in March 1973, a fall of 26.8 percent. Against the D-mark it went from 3.6370 to 2.3360 between January 1971 and July 1973, a fall of 35.8 percent. Against the Swiss franc, over the same window, 34.4 percent. Against sterling it did not fall at all: the pound bought 2.4058 dollars in January 1971 and 2.3252 in November 1974, so the dollar was 3.4 percent stronger nearly four years later.

And against the basket, measured by the Federal Reserve Board's own trade-weighted index, the move over the acute six months was 11.0 percent. That is the smallest of all the figures above, and it is the one a headline would most likely use.

None of these are inconsistent. A trade-weighted index is an average, and averages of things moving in opposite directions understate every individual move. The dollar collapsed against currencies whose issuers had strong external positions and were being forced to revalue, and held its own against one whose issuer had a payments crisis running in parallel. Sterling is not an anomaly; it is a reminder that a currency's value is a relative price, so "the dollar fell" is incomplete until it names the other side.

The domestic measure ran on a different clock entirely and ended up much larger than any of the exchange rate moves. The consumer price index stood at 40.8 in August 1971. By December 1974 it was 51.9, a rise of 27.2 percent. By December 1980 it was 86.3, a rise of 111.5 percent, which is to say that the domestic purchasing power of a dollar had more than halved in nine years and four months. Anyone who defined the dollar's value by what it bought at home experienced something far larger than anyone who defined it by what it bought in Frankfurt.

For how currency moves propagate into other asset classes, this site's standing treatment is the dollar, rates and cross-asset transmission.

What Happened to Inflation Once the Controls Came Off?

The sequence is the most misread part of the whole episode, so it is worth laying the years out next to each other rather than describing them.

Consumer price index for all urban consumers, not seasonally adjusted, December level and twelve-month change; effective federal funds rate, monthly average for December; unemployment rate for December.

Start with the row that undermines the standard narrative. Inflation in the twelve months to December 1970 was 5.6 percent, higher than either of the two years that followed the Nixon Shock. Whatever August 1971 did, it did not start the inflation, and the two best-looking years in the table are the two years of price controls.

Then look at the two columns to the right. Unemployment falls from 6.1 percent to 4.9 percent across the controls period, reaching 5.3 percent in the month of the 1972 election, and the federal funds rate spends 1972 at levels a recession would have justified. The programme delivered exactly what it was designed to deliver, on exactly the schedule that mattered politically.

Then look at what happens when the mechanism is removed. Between December 1972 and December 1974 the price level rose 22.1 percent, and the funds rate had to go from 5.33 percent to almost ten percent within a year to respond to it. The 1973 and 1974 numbers are usually attributed entirely to oil, and the oil shock was genuinely enormous, which is why it has its own case study here. But the deferred component is real and separable: prices that had been legally prevented from rising for two years had two years of adjustment to make, and they made it in the same window.

What August 1971 changed was not the inflation rate but the constraint. Under convertibility, running monetary policy loose enough to produce persistent inflation had a mechanical consequence: dollars flowed abroad and foreign central banks could ask for gold. That was a bad discipline, slow and easily evaded, and it never actually stopped the Federal Reserve doing anything. But it existed. After August 1971 nothing external limited the price level at all, and it took until the end of the decade to build a domestic substitute for the constraint that had been removed. The relevant guide here is how to read CPI, PCE and core inflation measures.

Who Bore the Loss When the Peg Broke?

Currency regime changes have an unusually clean answer to this question, because a devaluation is a transfer with an identifiable payer.

Foreign central banks paid first and paid most. A central bank that had spent the 1960s accumulating dollars rather than presenting them for gold held an asset whose gold content was cut 7.9 percent in December 1971 and a further 10 percent in February 1973. Many had held off from converting precisely because the United States asked them to. The reward for cooperating with the defence of the system was to be holding the currency when it was written down, twice, by legislation.

Exporters into the United States absorbed a price change they could not pass on. A Japanese manufacturer whose costs were in yen and whose revenue was in dollars saw the exchange rate move 26.8 percent against it in twenty-six months, and paid a ten percent surcharge at the American border for four of those months on top. That is a margin problem of a size no ordinary business plan contemplates, arriving without a hedging market of any depth, because a world of fixed rates had never needed one.

Domestic holders of long-dated dollar claims paid over the following decade. The 111.5 percent rise in consumer prices between August 1971 and December 1980 fell on anyone holding a fixed nominal claim through that period, which in practice meant savers, pensioners and bondholders. This loss was slower and less visible than the devaluations, and much larger.

Producers subject to the freeze paid in the form of a distorted relative price. The June 1973 order is the clearest illustration, because it exempted raw agricultural products and covered processed ones, setting an input price free while holding an output price fixed. A control that binds unevenly does not remove a price increase; it decides who is not permitted to charge for it.

The beneficiaries deserve stating carefully, because this is where hindsight is most tempting. Countries whose currencies were forced upward gained purchasing power over imports and lost export competitiveness, which is a trade rather than a windfall. Gold holders did well in a way strictly unavailable to Americans, who could not lawfully own it until 31 December 1974, so the obvious trade of the era was illegal for the people closest to the news. And the United States gained the ability to run monetary policy without an external constraint, which was a real benefit and, on the evidence of the seven years that followed, an expensive one.

Why Is 42.22 Dollars an Ounce Still on the Treasury's Books?

This is the strangest surviving artefact of the collapse, and it is entirely traceable.

Public Law 93-110, approved 21 September 1973, amended the Par Value Modification Act by striking the words "one thirty-eighth of a fine troy ounce of gold" and inserting a new standard: 0.828948 Special Drawing Right, or the equivalent in terms of gold, of forty-two and two-ninths dollars per fine troy ounce. Forty-two and two-ninths is 42.2222.

The par value system itself did not survive the decade. The number did, because it was written into a different statute before the first was repealed. Section 5117(b) of title 31 of the United States Code still provides that outstanding gold certificates may be no more than the value of the gold held against them, "for the purpose of issuing those certificates, of 42 and two-ninths dollars a fine troy ounce". The revision note explains the transplant: that phrase replaced a cross-reference to the old legal standard because that was the standard in force on 19 October 1976, and the section it pointed at had been repealed.

So the accounting convention outlived the monetary system it came from by half a century. The Bureau of the Fiscal Service publishes the Status Report of U.S. Government Gold Reserve monthly, and the report for 31 July 2026 shows 261,498,926 fine troy ounces of Treasury-owned gold carried at a book value of 11,041,059,958 dollars. Divide the second by the first and the answer is 42.2222, the number Congress chose in the autumn of 1973 to describe a dollar that no longer had a gold content.

Where this matters practically. The book value is not a market value and was never intended to be one. Any analysis that treats the Treasury's gold as an eleven billion dollar asset is reading a legislative constant from 1973 as though it were a price. The quantity in the report is the meaningful figure; the dollar column is a fossil. Note also that both halves can change: the statutory figure is a number in a live section of the United States Code and the holdings are restated monthly.

What Did the World Get Instead of Bretton Woods?

Nothing designed, which is the part that most deserves attention.

Bretton Woods was the product of more than two years of preparation, a three-week conference of forty-four nations, two competing written plans and a treaty. What replaced it emerged in March 1973 because foreign governments, confronted with buying unlimited quantities of dollars to hold their pegs, declined to keep doing it. No conference chose floating rates. A defence stopped being worth mounting, and floating is the name for what is left when nobody is defending anything.

Three features of the successor arrangement are still the world investors operate in.

The dollar kept its reserve role after losing its backing. The formal reason foreign central banks held dollars was that dollars were claims on gold. That claim was withdrawn, the gold price against the dollar was cut twice by statute, and the dollar remained the currency other countries held. The reserve role evidently rested on the depth of the market for United States government debt, the size of the economy and the absence of an alternative, rather than on the convertibility clause, which had been decorative for some time before it was removed.

Exchange rate risk became something that had to be managed. Under a working peg a corporate treasurer's currency exposure is a rounding error and a hedging market has nothing to price. After March 1973 the same exposure could move ten percent in a quarter. The modern foreign exchange derivatives complex is a direct response to a risk the previous regime had suppressed rather than eliminated.

Monetary policy became domestically determined, and then had to find a domestic anchor. Removing the external constraint left every central bank free to choose its own inflation rate, which took most of them the rest of the decade and, in the American case, a deliberate and painful campaign to demonstrate. Everything this site covers about central bank credibility, in Federal Reserve policy rates and forward guidance, exists because that anchor had to be built from nothing after 1973.

What Would a Comparable Break Look Like Now?

Not like this one, and the differences are worth being specific about before drawing any parallel.

The 1971 break had a feature almost nothing today shares: a fixed conversion price between a liability and a scarce physical asset, held constant from 1944 to 1971, honoured by one issuer for the entire world. No external convertibility promise is attached to the dollar now, so the specific failure mode of 1971 cannot repeat; the mechanism it broke no longer exists.

What can repeat is the underlying structure, which is a promise to redeem at a fixed price against a reserve smaller than the claims outstanding, plus a population of holders who have not yet decided to test it. Written that way it is recognisable in several places: a currency board or a hard peg maintained on borrowed reserves, which is roughly what broke in the Asian financial crisis; a bank promising par redemption on deposits against assets it cannot sell at par, which is what broke at Silicon Valley Bank; and any redeemable-at-one instrument whose reserve composition is asserted rather than verified.

The three diagnostic questions that transfer from 1971 are narrow enough to be answerable.

Is the coverage ratio improving or deteriorating, and for how long has it been below one? In the Bretton Woods case the answer was ten years, which is long enough that its predictive value for timing was zero and its predictive value for eventual outcome was total.

Has the defensive apparatus grown without ever shrinking? The swap lines went from 900 million dollars in 1962 to a standing intermediate-term facility by 1971 and never unwound. A bridge that is renewed indefinitely has become a floor, and the position underneath it has not been fixed.

Has the issuer conceded a second price? The two-tier gold market of March 1968 held the official price by publicly accepting that the private one was different. When the operator of a fixed price agrees that a different price exists elsewhere, the fixed price has already become a convention rather than a fact, and only the date is open.

Common Myths About the Nixon Shock

"Americans could no longer swap dollars for gold after 1971." They could not swap dollars for gold before 1971 either, and could not own monetary gold at all. What ended in August 1971 was convertibility for foreign official holders. Private dealing in gold was prohibited in the United States until Public Law 93-110 of September 1973 repealed sections 3 and 4 of the Gold Reserve Act of 1934, and even then the repeal was conditional; the change took effect on 31 December 1974 under Public Law 93-373. For an ordinary American the gold window had been shut for four decades before Nixon shut the other one.

"Bretton Woods ended on 15 August 1971." The anchor went that night; the system took another nineteen months. The Group of Ten negotiated a repair in December 1971, Congress legislated a new gold par value in March 1972 and another in September 1973, and the major currencies did not float until March 1973. Treating the announcement as the end hides the fifteen months of attempted reconstruction, which contain most of what is instructive.

"The Nixon Shock caused the Great Inflation." Consumer prices rose 5.6 percent in the twelve months to December 1970, before any of it, and the acceleration dates from the mid-1960s. The two calendar years immediately after the announcement printed 3.3 and 3.4 percent, the best readings of the decade, because prices were controlled by law. August 1971 removed an external constraint on monetary policy and installed a temporary statistical one. It did not create the pressure that both of those things were responding to.

"The import surcharge was a protectionist turn." It was a negotiating instrument with a four-month life. Proclamation 4074 imposed it on 16 August 1971 and Proclamation 4098 removed it on 20 December, the second document saying in its own preamble that the Group of Ten agreement permits removal. It applied only to dutiable articles and was capped at the second-column rate. It was designed to be surrendered.

"Floating exchange rates were a policy choice." They were a residue. Fixed rates were attempted twice more after August 1971, at the Smithsonian and again in February 1973, and both attempts were legislated for in the United States Code. Floating happened when foreign governments stopped being willing to buy the dollars required to hold the line. Nobody selected the successor regime; it is what remained after the defence was abandoned.

"Nixon devalued the dollar by ten percent." Two devaluations occurred and neither was his alone. The first was negotiated at the Smithsonian and enacted by Congress in March 1972; the second was announced in February 1973 and enacted in September. Percentages quoted for either depend on which end of the fraction is being measured: the second step is 10 percent off the dollar's gold content and 11.1 percent onto the gold price, and both figures describe the same change.

What a Reader Can Actually Carry Forward

The reflex conclusion is that fixed exchange rates do not work. It is not much use, partly because plenty of them have worked for decades and partly because almost nobody reading this will ever manage one. The transferable material is elsewhere.

What generalizes

• A redemption promise fails on the date it is tested, not the date it becomes unbackable. The gap here was ten years. Anyone concluding in 1961 that the arrangement could not hold was right about the outcome and wrong about the timing for a decade. Structural analysis tells you what will happen and almost nothing about when, so only a position sized for the mechanism rather than the calendar survives the gap.
• Stability in the instrument you are watching is not evidence of stability in the system. Dollar-yen moved less than two tenths of one percent across the first seven months of 1971 while the D-mark and the Swiss franc were already outside their bands. Pegged markets concentrate stress wherever the defence is weakest, which is not usually the pair on the front page.
• Watch the defence, not the defended. A backstop that grows every year and never unwinds, and an official who concedes that a second price exists, are both statements about the position underneath. The Federal Reserve's swap lines and the two-tier gold market of 1968 each said more about the system's condition than the official gold price, which by construction could not say anything.
• Suppressing a measurement defers a repricing rather than preventing it. The freeze produced two calendar years of inflation near three percent, followed by 8.7 and 12.3 percent. When a price is held by rule rather than by conditions, the accumulated difference is still owed, and only who pays it and when is open.
• "The currency fell" is an incomplete sentence. Over the same episode the dollar fell 35.8 percent against the D-mark, 26.8 percent against the yen, 11.0 percent on a trade-weighted basis, and rose against sterling. Every one of those is true. Which one is relevant depends entirely on what a given portfolio actually owes and owns.

What does not generalize

• The nineteen-month gap between the anchor breaking and the system breaking. It existed because a treaty structure and two legislatures had to be worked through. A modern peg with no treaty behind it goes in days, closer to what the Asian crisis looked like.
• The absence of a hedging market. Exporters in 1971 had almost no way to lay off a currency exposure, because a world of fixed rates had never built the instruments. That defencelessness is a feature of the first break in a regime, not of currency crises generally.
• The two-year price freeze. Comprehensive peacetime wage and price controls in the United States were unprecedented when they were imposed and have not been repeated. Expecting that particular response again is probably the wrong preparation.

The question worth asking now

"Is the dollar about to collapse" has been asked without interruption since 1971 and answered correctly by nobody, so it is the wrong thing to spend attention on. Something smaller is answerable: for each instrument in a portfolio that promises redemption at a fixed value, what sits behind the promise, who is entitled to test it, and what would make them decide to. Holders of dollar claims in the 1960s could have answered that from published numbers, and the answer would have been the same for ten years before it mattered.

References

Every figure on this page was verified against the following sources, each retrieved on 26 August 2026:

• The American Presidency Project: Address to the Nation Outlining a New Economic Policy, "The Challenge of Peace": the suspension of convertibility, the ninety-day freeze and the ten percent import tax.
• The American Presidency Project: Executive Order 11615, Providing for Stabilization of Prices, Rents, Wages, and Salaries: the ninety-day term, the base period ending 14 August 1971 and the statutory authority.
• The American Presidency Project: Proclamation 4074, Imposition of Supplemental Duty for Balance of Payments Purposes: the ten percent duty on dutiable articles from 12:01 a.m. on 16 August 1971, and the second-column cap.
• The American Presidency Project: Proclamation 4098, Termination of Additional Duty for Balance of Payments Purposes: the 20 December 1971 termination and its recital of the Group of Ten agreement.
• The American Presidency Project: Executive Order 11723, Further Providing for the Stabilization of the Economy: the second freeze of 13 June 1973, its sixty-day maximum, the raw agricultural exemption and the extension of authority to 30 April 1974.
• Federal Reserve History: Nixon Ends Convertibility of U.S. Dollars to Gold and Announces Wage/Price Controls: the Camp David meeting and its participants, the London gold price of 40 dollars on 20 October 1960, the Gold Pool of 1 November 1961 and its March 1968 collapse, the swap lines from March 1962 totalling 900 million dollars across nine central banks, and the United States share of world official gold reserves.
• Federal Reserve History: The Smithsonian Agreement: the 1961 crossover of dollar claims over the United States gold stock, the approximately 8.5 percent devaluation against gold to 38 dollars, the roughly 10.7 percent average devaluation against other key currencies, the market gold price of around 60 dollars by mid-1972 and 90 by early 1973, and the 12 February 1973 devaluation.
• Federal Reserve History: Creation of the Bretton Woods System: the forty-four nations and seven hundred and thirty delegates at the Mount Washington Hotel in July 1944, the Keynes and White plans, the one percent band, the 35 dollar gold price and the twenty-nine original signatories of the IMF Articles.
• Federal Reserve History: Launch of the Bretton Woods System: the 1958 removal of current-account exchange controls, the 1968 move to a dollar standard and the March 1973 decision by foreign governments to float.
• United States Statutes at Large: Public Law 92-268, the Par Value Modification Act: approved 31 March 1972, directing a new par value of one dollar equal to one thirty-eighth of a fine troy ounce of gold.
• United States Statutes at Large: Public Law 93-110, An Act to Amend the Par Value Modification Act: approved 21 September 1973, substituting 0.828948 Special Drawing Right or forty-two and two-ninths dollars per fine troy ounce, repealing sections 3 and 4 of the Gold Reserve Act of 1934, and naming the Smithsonian of 18 December 1971.
• United States Statutes at Large: Public Law 93-373: approved 14 August 1974, permitting United States citizens to deal in gold with effect from 31 December 1974.
• Office of the Law Revision Counsel: 31 U.S.C. 5117, Transferring Gold and Gold Certificates: the valuation of 42 and two-ninths dollars a fine troy ounce, and the revision note dating it to 19 October 1976.
• Bureau of the Fiscal Service: Status Report of U.S. Government Gold Reserve: 261,498,926 fine troy ounces at a book value of 11,041,059,958 dollars as of 31 July 2026, summed across the eight reported lines.
• Federal Reserve Bank of St. Louis, for every exchange rate, index level, price level, policy rate and balance quoted: Series EXJPUS, yen per United States dollar, monthly average, Series EXGEUS, German marks per United States dollar, monthly average, Series EXSZUS, Swiss francs per United States dollar, monthly average, Series EXUSUK, United States dollars per pound sterling, monthly average, Series TWEXMMTH, trade-weighted nominal dollar index against major currencies, monthly, Series CPIAUCNS, consumer price index for all urban consumers, not seasonally adjusted, Series FEDFUNDS, effective federal funds rate, monthly average, Series UNRATE, unemployment rate and Series BOPBCA, balance on current account, quarterly.

Figures deliberately not stated. This page gives no figure for the United States gold stock in ounces or dollars at any date before 2012, and no figure for foreign official dollar liabilities, because no primary or institutional source for those levels was verified while writing it; the crossover between the two is stated as the Federal Reserve's history states it, without a magnitude. It gives no equity index level or return for 1971 to 1974, no size for the Bank of Japan's dollar purchases in August 1971, no width in percent for the bands agreed at the Smithsonian beyond the fact that they were wider than one percent, no individual Smithsonian central rate, and no market gold price other than the two approximations the Federal Reserve's own essay supplies. The widely repeated account of a British request for gold cover in the week before 15 August 1971 is omitted entirely because it could not be verified against a primary source.

Method note: every percentage derived from a data series on this page was calculated by Swoopr Investment from the series named above rather than taken from a secondary account. A small number of figures could not be recomputed and are instead quoted from the Federal Reserve's own essays: the two Smithsonian devaluation percentages, the approximate market gold prices for 1972 and 1973, the United States share of world official gold reserves in the early postwar years, and the 1965 to 1969 inflation path. The References list records which essay supplies each. Every exchange rate on this page is a monthly average, not a daily close, so a move dated to a month is a change in the average and not an intraday event; this matters most in August and September 1971, where the announcement falls in the middle of a month. Percentage changes in exchange rates are stated from the dollar's point of view, so a fall means the dollar bought less. Consumer price changes are December to December on the not-seasonally-adjusted index. The two devaluation percentages are stated in both directions where the direction affects the number, because the dollar's gold content and the gold price are reciprocals of each other.

This is educational content about a historical episode. It is not investment advice, it is not a forecast, and nothing here should be read as a view on any currency or commodity today.

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