In a rare move in the foreign exchange market, the United States recently executed an intervention by directly selling euros to purchase Japanese yen. The action caught the European Central Bank off guard and disrupted a long-standing tacit understanding among central banks of major Western economies regarding market communications. According to multiple market sources familiar with the matter, Washington did not coordinate with its counterparts in Frankfurt until all trading activities concluded and settled late last Friday. Following the settlement, the ECB president held a telephone conversation over the weekend with the top US Treasury official to clarify the context and objectives behind the operation.

This unilateral action, undertaken without prior consultation, has been viewed by several senior ECB officials as a significant departure from traditional transatlantic financial cooperation. For nearly three decades, when confronted with sharp currency fluctuations, monetary authorities in Europe, the US, and Japan typically relied on intensive closed-door consultations to reach policy consensus, often coordinating interventions or pooling resources to stabilize markets. The euro sale, carried out by the New York Federal Reserve Bank using funds from the US Treasury’s Exchange Stabilization Fund, was described by insiders as unprecedented and regrettable. Some European policymakers fear that bypassing established coordination mechanisms could erode the trust central banks have carefully cultivated over the years to safeguard global financial stability.

In response to external scrutiny, the US Treasury firmly stated that reallocating assets through the Exchange Stabilization Fund falls squarely within its statutory mandate and does not require prior alignment with foreign regulatory bodies. Washington emphasized that the decision stemmed from an independent assessment of dollar liquidity, asset valuations, and broader market conditions. Additional reports suggest that Washington opted to use the euro rather than the dollar for the intervention primarily to avoid sending bearish signals about the US currency, thereby aligning with its broader policy objective of maintaining a strong dollar. Despite US insistence on operational secrecy, financial markets reacted swiftly to the development.

Driven by the US intervention and simultaneous official market activity by Japanese authorities, the yen staged a notable rebound after hitting its lowest level since 1986 earlier this month. Against the dollar, the pair has recovered from near 164 to approximately 158. Nevertheless, market participants remain vigilant. Recently following a monetary policy meeting, the BOJ governor hinted that policymakers must monitor upside inflation risks more closely than before, given persistent domestic price pressures. Current expectations place the probability of an interest rate adjustment at the next meeting below 50%. Meanwhile, yields on US long-dated Treasuries continue to climb, reflecting investor caution regarding the Federal Reserve’s near-term rate-cutting trajectory. Although overall US inflation data has cooled, it remains significantly above the official 2% target, underscoring how macroeconomic complexities continue to shape global capital flows.