What it means
Delegates from 44 nations met at Bretton Woods in New Hampshire in July 1944 to design a monetary system that would avoid the competitive devaluations and trade collapse of the 1930s. The answer was a system of fixed but adjustable exchange rates anchored to the US dollar.
The dollar in turn was convertible into gold at $35 per fine ounce for foreign monetary authorities. Two institutions came out of the conference.
The International Monetary Fund was set up to lend to countries with temporary balance of payments problems so they would not have to devalue in a panic, and what became the World Bank was created to finance reconstruction and development. Both still exist and both still trace their governance to that meeting.
The practical effect for businesses was decades of predictable exchange rates. A company could sign a multi-year export contract without much currency risk, because member governments were committed to holding their rate within a narrow band.
Devaluations happened, but they were negotiated events rather than daily market moves. The system contained a flaw that eventually broke it.
As world trade grew, foreign holdings of dollars grew faster than the US gold stock backing them, so the promise of convertibility became steadily less credible. In August 1971 the United States suspended it, and by 1973 the major currencies were floating.
The legacy matters more than the mechanics. The dollar remains the dominant reserve and invoicing currency, the IMF and World Bank remain central to sovereign finance, and every argument about pegged versus floating currencies still borrows its vocabulary from that conference.
Understanding it explains why a devaluation in a pegged economy is a political event rather than a market one.
In practice
Real-world examples.
Example
A British machine tool exporter in the 1950s signs a five-year supply contract with a US buyer priced in dollars. Because the pound is pegged at $2.80 under the Bretton Woods system, the exporter can plan production costs and margins for the whole contract without buying currency hedges.
Example
A country running short of reserves in the 1960s draws on an IMF standby arrangement rather than devaluing immediately. The loan buys time to correct its trade deficit, which is exactly the role the Bretton Woods designers intended the Fund to play.
Example
A treasury team today operating in an economy that pegs its currency to the dollar faces the same trade-off the system created. Importers get stable pricing, but the central bank cannot cut interest rates independently when the domestic economy slows.
Formula
Calculation
Formula: gold claim in fine ounces = dollar reserves / $35 per fine ounce. Under a fixed peg, local currency received = dollar invoice / the pegged rate.
Worked example: Under the agreement the United States undertook to exchange dollars for gold at $35 per fine ounce. A central bank holding $350,000,000 of dollar reserves could therefore claim $350,000,000 / $35 = 10,000,000 fine ounces of gold, and that certainty was what made the dollar acceptable as a reserve asset.
The pound was pegged at $2.80. A British exporter invoicing $2,800,000 received $2,800,000 / 2.80 = 1,000,000 pounds, with no exchange rate uncertainty to manage between order and payment.
When the pound was devalued to $2.40 in 1967, the same $2,800,000 invoice converted to $2,800,000 / 2.40 = 1,166,667 pounds. That is a gain of 1,166,667 - 1,000,000 = 166,667 pounds, or about 16.7% more local currency, even though the currency itself had fallen by ($2.80 - $2.40) / $2.80 = 14.3%. The two percentages differ because one measures the rise in pounds received and the other measures the fall in the dollar value of a pound.Case study
Seen in the real world.
Ashgrove Textiles is an illustrative, fictional British mill that in the mid-1960s sold $5,600,000 of cloth a year to American buyers under the Bretton Woods peg of $2.80 to the pound. That converted to $5,600,000 / 2.80 = 2,000,000 pounds of revenue, a figure the board could budget years ahead.
When the pound was devalued to $2.40 in November 1967, the same dollar sales converted to $5,600,000 / 2.40 = 2,333,333 pounds, an increase of 2,333,333 - 2,000,000 = 333,333 pounds or about 16.7%. Ashgrove's imported dyestuffs, priced in dollars, became correspondingly more expensive overnight, so the net benefit was smaller than the headline revenue gain suggested.
The fictional example shows why devaluation under a fixed rate system was such a blunt instrument. It arrived as a single overnight step rather than a gradual market adjustment, it helped exporters and hurt importers in one stroke, and companies had no practical way to hedge against a decision taken by a government.
Watch out
Common mistakes.
- Believing Bretton Woods fixed exchange rates permanently, when rates were adjustable with the Fund's agreement and several were in fact changed.
- Thinking ordinary citizens could exchange dollars for gold, when convertibility applied only to foreign central banks and monetary authorities.
- Assuming the whole framework disappeared in 1971, when the IMF and World Bank both continue to operate today.
Questions
People also ask.
What ended the Bretton Woods system?
The United States suspended the convertibility of dollars into gold in August 1971, and by 1973 the major currencies were floating.
Why was the dollar chosen as the anchor?
Because the United States held the large majority of the world's monetary gold and was the dominant creditor economy at the end of the Second World War.
Is anything like it in place today?
No global system exists, but many individual countries still peg their currency to the dollar or the euro and face the same policy trade-offs.
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