The United States has taken the extraordinary step of joining Japan in a coordinated currency intervention to pull the yen back from a four-decade low, signalling that Washington views the currency's prolonged collapse as a systemic risk extending well beyond Tokyo's borders. The joint operation drove the yen from nearly 164 against the dollar last month to around 155.20 before it settled near 157. According to central bank data cited by Reuters, Japan may have spent as much as $36.58 billion buying yen during Friday's operation alone.
In a notable structural detail, the US Treasury reportedly sold euros rather than dollars to purchase yen, a technical choice that limits the direct impact on dollar liquidity. This marks the first coordinated US-Japan currency intervention since the aftermath of Japan's devastating earthquake and tsunami in 2011, and the first joint attempt in almost three decades specifically aimed at strengthening, rather than weakening, the yen. Japanese Finance Minister Satsuki Katayama confirmed that Tokyo bought yen in coordination with the US Treasury Department.
"We will not hesitate to conduct further joint intervention," she said. President Donald Trump described the move as assistance to an important ally, calling it a "signal of friendship" and adding that it is "also good for the world economy." Trump also acknowledged a "financial benefit" accruing to the United States from the operation. The public acknowledgment of the intervention was itself unusual.
Currency operations are typically kept deliberately opaque so that traders remain uncertain about official intentions. The most pressing US concern behind the intervention is not the exchange rate in isolation. Japan is the largest foreign holder of US government debt, owning more than $1.1 trillion in Treasuries.
Its overall portfolio of US Treasuries, equities and other assets is close to $3 trillion, according to the New York Times, including nearly $1.2 trillion in American equities and more than $300 billion in corporate debt. To buy yen through conventional intervention, Tokyo draws dollars from its foreign-exchange reserves, which are heavily invested in US government bonds. If repeated intervention forced Japan to liquidate Treasuries on a large scale, bond prices could fall and yields could rise, translating into higher borrowing costs for the US government at a time when long-term yields are already under pressure.
The New York Times noted that the 30-year Treasury yield recently reached its highest level since 2007. "For Washington, supporting the yen is relatively low-cost insurance," Moody's Analytics economist John Bromhead wrote in a note cited by the New York Times. The Federal Reserve's standing repo facility for foreign monetary authorities provides an additional buffer, allowing Japan to temporarily exchange Treasury securities for dollars rather than selling those bonds outright.
The Fed has stated the facility was designed partly to prevent foreign demand for dollar liquidity from disrupting US financial markets. Treasury Secretary Scott Bessent has indicated that Washington could consider expanding access to that backstop in the coming months. Beyond debt-market considerations, the intervention aligns with Trump's longstanding view that an excessively strong dollar disadvantages American exporters.
The trade imbalance is substantial: the US imported about $146 billion in goods from Japan last year while exporting roughly $82 billion, according to US trade data cited by the New York Times. A stronger yen makes US products more competitive in Japan while reducing the price advantage enjoyed by Japanese exporters, particularly in automobiles and industrial equipment. "It's very rare that the Americans will work with the Japanese on this, but there is an alignment of interests here basically between Japan and America," Astris Advisory Japan strategist Neil Newman told the Associated Press.
The Financial Times framed the move as the emergence of a more interventionist US currency policy under Treasury Secretary Bessent. "The US Treasury's arrival marks a new sheriff in town, warning speculators away from selling the yen," ING's global head of markets Chris Turner told the FT, describing the action as marking "a return to an age of FX activism." The yen's importance extends across the broader Asian financial architecture. As the world's third most traded currency after the dollar and euro, according to Bank for International Settlements data cited by the New York Times, a sustained yen depreciation can drag down currencies such as the South Korean won, prompting governments across the region to spend dollar reserves to defend their own exchange rates.
This in turn could trigger broader Treasury selling by Asian central banks and blunt the impact of US tariffs by making Asian exports cheaper. There is also a geopolitical dimension. Japan is a central US ally in Asia and a cornerstone of Washington's strategic architecture for balancing China.
Oxford Economics' Shigeto Nagai described the intervention as a "low-cost" favour to an ally that simultaneously protects currency and bond-market stability. Nevertheless, analysts caution that the joint action buys time rather than resolving the structural pressures weighing on the yen. The Bank of Japan's benchmark rate stands at 1%, its highest in 31 years but still far below the Federal Reserve's 3.5%-3.75% range.
That differential continues to encourage investors to borrow cheaply in yen and redeploy funds into higher-yielding dollar assets. Japan also imports most of its energy, and higher oil prices, exacerbated by tensions related to the Iran war, increase the country's dollar import bill and worsen domestic inflation. Prime Minister Sanae Takaichi's advocacy of heavier government spending and a reduction in the food sales tax from 8% to 1% adds further fiscal uncertainty against the backdrop of a national debt already exceeding twice the size of Japan's economy.
"If Japan wants a higher yen, it needs to address the monetary and fiscal policy concerns," former US Treasury official Mark Sobel told Reuters. The Bank of Japan is now under pressure to reinforce the intervention with an interest-rate increase, possibly as early as September. However, tightening too aggressively could hurt growth and shake Japan's bond market.
"The yield differential remains wide, Japan's energy-import burden remains significant, and the Bank of Japan is still moving more slowly than the market would normally require to generate a sustained currency reversal," SPI Asset Management's Stephen Innes said in commentary cited by the Associated Press. The joint operation has meaningfully shifted the risk calculus for currency speculators, but it has not altered the underlying economic equation. Washington is supporting the yen because the alternative — a weaker Asian currency, large-scale Treasury sell-offs, higher US borrowing costs and a stronger dollar — could ultimately prove far more costly for the United States itself.
Source: timesofindia.indiatimes.com