The Plaza Accord: When Five Nations Moved the Dollar (1985)

A Dollar Too Strong

By the mid-1980s, the United States was living with the consequences of the monetary revolution that Paul Volcker's Federal Reserve had unleashed. Volcker's campaign to crush inflation through historically high interest rates had succeeded spectacularly — consumer price inflation fell from 14.8% in 1980 to 3.2% by 1983. But the same high interest rates that broke inflation also attracted enormous flows of foreign capital into dollar-denominated assets, as money poured into US Treasury bonds and bank deposits from every corner of the world, drawn by yields that dwarfed those available in Europe or Japan.

Between 1980 and February 1985, the trade-weighted value of the dollar rose by approximately 50%. Against the Deutsche mark it climbed from 1.82 to 3.47; against the Japanese yen, from around 227 to 260. By most measures, the dollar was more overvalued than at any point since the collapse of the Bretton Woods system in 1971.

For American industry, the strong dollar was ruinous. US exports became prohibitively expensive in foreign markets, while imports flooded in at prices domestic manufacturers could not match. The US trade deficit ballooned from $31 billion in 1980 to $122 billion in 1985 — a figure that seemed almost inconceivable at the time. Roughly two million manufacturing jobs disappeared between 1980 and 1985, and the industrial heartland of the Midwest, already battered by the Volcker recession, suffered a second wave of plant closures and layoffs.

Political pressure was intense. By 1985, more than 300 protectionist trade bills had been introduced in Congress, ranging from across-the-board import surcharges to targeted quotas on Japanese automobiles, steel, and semiconductors. Democratic Congressman Richard Gephardt proposed legislation that would have imposed automatic tariffs on countries running persistent trade surpluses with the United States. The Reagan administration — philosophically committed to free trade — faced a protectionist revolution on Capitol Hill that it could not control.

James Baker Reverses Course

James A. Baker III became Treasury Secretary in February 1985, replacing Donald Regan, who had insisted that the strong dollar was a sign of global confidence in the American economy and that government intervention in currency markets was both futile and philosophically unacceptable. Regan's position had been consistent with the free-market ideology of the Reagan administration's first term, but it was becoming politically untenable.

Baker was a pragmatist, not an ideologue. A Houston lawyer and political operative who had managed both Gerald Ford's and George H.W. Bush's presidential campaigns, he understood that economic policy had to serve political reality. The administration could not allow protectionist legislation to destroy its free-trade agenda, and the most effective way to defuse the protectionist pressure was to bring the dollar down.

Baker enlisted his deputy Richard Darman and Assistant Secretary David Mulford to develop a strategy for coordinated intervention. Their approach drew on a recognition growing among economists and policymakers: the dollar was not merely strong but in the grip of a speculative overshoot. Frankel (1985) and others argued that the dollar had risen far beyond what economic fundamentals could justify, sustained by self-reinforcing expectations in currency markets.

Five Ministers at the Plaza

On September 22, 1985, the finance ministers and central bank governors of the Group of Five — the United States, Japan, West Germany, France, and the United Kingdom — gathered in secret at the Plaza Hotel on Fifth Avenue. Baker had spent weeks in bilateral consultations to ensure that an agreement was possible before the ministers sat down together.

The communique issued afterward was deceptively simple. The G5 ministers declared that exchange rates should better reflect fundamental economic conditions, that the dollar was overvalued, and that they were prepared to cooperate more closely to correct the situation. In practical terms, central banks committed to selling dollars in coordinated fashion on foreign exchange markets, with a total intervention commitment of approximately $10 billion.

Markets reacted immediately and overwhelmingly. In the first 24 hours after the announcement, the dollar fell 4.3% against a basket of major currencies — its largest single-day decline since the advent of floating exchange rates in 1973. Within three months, the dollar had fallen 18% against the yen and 14% against the Deutsche mark.

What mattered most was not the direct intervention itself, which was modest relative to the scale of global currency markets. It was the signal. By announcing publicly that the world's five major economic powers wanted the dollar to fall, the G5 ministers changed the expectations of every participant in the foreign exchange market. Speculators who had been riding the dollar's appreciation suddenly found themselves on the wrong side of a trade backed by the collective will of five governments. As Obstfeld (1990) argued, the intervention worked primarily through its effect on expectations rather than through the mechanical impact of official sales on the supply of dollars.

A Dollar in Freefall

The depreciation that followed was far larger and more sustained than anyone had anticipated. By the end of 1985, the dollar had fallen to 200 yen from 242 on the day of the agreement. By early 1987, it reached 150 yen. By the end of 1987, the dollar stood at approximately 128 yen — a decline of roughly 50% from its February 1985 peak. Against the Deutsche mark, the fall was comparable: from 3.47 to approximately 1.58.

The speed and magnitude of the decline alarmed the same officials who had engineered it. A falling dollar was the objective, but a dollar in freefall threatened to destabilize international capital markets, undermine confidence in dollar-denominated assets, and trigger inflationary pressures in the United States as import prices rose. A growing concern was that the adjustment was being borne disproportionately by Japan and Germany, whose export-dependent economies were being squeezed by their rapidly appreciating currencies.

From the Plaza to the Louvre — and Black Monday

On February 22, 1987, the G6 finance ministers — the G5 plus Canada — met at the Louvre Palace in Paris and announced a new agreement. Where the Plaza Accord had aimed to push the dollar down, the Louvre Accord sought to stabilize currencies around their current levels, declaring that exchange rates were now broadly consistent with economic fundamentals.

The Louvre Accord was far less successful than its predecessor. Underlying economic imbalances had not been fully corrected: the US trade deficit remained large, Japan's trade surplus persisted, and the monetary policy responses to the dollar's decline were creating new distortions. In Japan, the Bank of Japan lowered interest rates repeatedly to offset the contractionary effect of the stronger yen on exports — a policy that planted the seeds of the most spectacular asset bubble of the twentieth century.

The fragility of the Louvre framework was exposed on October 19, 1987 — Black Monday — when the Dow Jones Industrial Average plunged 22.6% in a single session. The proximate triggers of the crash were complex and debated, but the underlying tensions in international monetary coordination played a significant role. In the weeks before the crash, disputes between the United States and Germany over interest rate policy had undermined confidence in the Louvre framework and raised fears of a disorderly dollar decline. Funabashi (1989) documented how the breakdown of the Louvre consensus contributed to the market instability that culminated in Black Monday.

Japan Pays the Price

The most consequential legacy of the Plaza Accord was its impact on Japan. The sharp appreciation of the yen — from 242 to approximately 128 against the dollar in just over two years — posed an existential threat to Japan's export-led growth model. Japanese manufacturers responded with adaptations that were impressive by any measure: investing heavily in automation, shifting production overseas, and moving up the value chain. Toyota, Honda, and Sony demonstrated resilience that few had expected.

But the macroeconomic policy response was catastrophic. Under pressure to support growth in the face of the rising yen, the Bank of Japan cut its discount rate from 5.0% to 2.5% between January 1986 and February 1987 — the lowest level in Japanese history at that time — and maintained this ultralow rate until May 1989, long after the economy had recovered from the initial yen shock.

Cheap money flooded into the most spectacular asset bubble of the modern era. The Nikkei 225 stock index rose from approximately 13,000 in 1985 to 38,957 on December 29, 1989. Tokyo real estate values reached levels at which the grounds of the Imperial Palace were said to be worth more than the entire state of California. When the bubble burst in 1990, Japan entered a prolonged period of economic stagnation — the so-called Lost Decade, which in reality stretched into two lost decades of deflation, zombie banks, and anemic growth. The parallels with the dynamics that later produced the Asian Financial Crisis of 1997 are difficult to ignore: in both cases, currency dislocations and loose monetary policy inflated asset bubbles whose collapse had lasting consequences.

Whether the Plaza Accord caused the Japanese bubble remains debated. Some scholars argue that the Bank of Japan's monetary easing was an independent policy error. Others, including Volcker and Gyohten (1992), contend that the yen's appreciation created political and economic pressures making the easing essentially inevitable — that the Plaza Accord set in motion a chain of events leading directly to the bubble and its aftermath.

What Coordinated Intervention Revealed

The Plaza Accord demonstrated that coordinated government intervention in currency markets could work, at least in the short and medium term. The dollar came down substantially, the protectionist threat in Congress was defused, and a trade war was averted. For those interested in how currency dynamics affect investment strategy, the accord's lessons remain relevant to understanding the carry trade and interest rate differentials that continue to drive capital flows across borders.

But the accord also revealed the profound difficulty of managing the consequences of intervention. The G5 ministers could move the dollar — they could not control the second-order and third-order effects of that movement. The yen's appreciation destabilized Japan. The Louvre Accord's attempt at stabilization proved fragile. Black Monday showed that international monetary coordination could generate as much instability as it resolved.

No subsequent attempt at coordinated currency intervention has been successfully repeated at the same scale — not during the Asian crisis of 1997, not after the September 11 attacks, not during the 2008 global financial crisis. The rise of private capital flows, which now dwarf official reserves, has made the kind of intervention practiced in 1985 far more difficult. Daily foreign exchange turnover was approximately $150 billion in 1985; by 2022 it exceeded $7.5 trillion.

What the Plaza Accord most vividly illustrates is the interconnectedness of economic policy decisions and their unforeseeable consequences. A domestic decision to fight inflation through high interest rates produced an overvalued currency. The overvalued currency produced a trade crisis. The trade crisis produced coordinated intervention. The intervention produced a currency adjustment. The currency adjustment produced a monetary policy response in Tokyo. And that monetary policy response produced an asset bubble whose collapse haunted Japan for a generation. Each link in this chain was rational in isolation. Taken together, they trace the irreducible complexity of the global monetary system — and the limits of even the most powerful governments' ability to control what they set in motion.