U.S.-Japan Yen Intervention Signals More Action
U.S.-Japan yen intervention on July 31 countered disorderly moves and signaled willingness to repeat joint action, tightening dollar funding conditions.
KEY TAKEAWAYS
- Coordinated yen-buying intervention occurred on July 31 during U.S. trading hours.
- Japan may have sold about $59.0 billion in dollar reserves to buy yen, BOJ data indicate.
- Officials pledged they will not hesitate to repeat joint interventions and signaled FIMA use for liquidity.
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Japan’s Ministry of Finance and the U.S. Treasury said on Aug. 3 that they conducted a coordinated yen-buying foreign-exchange intervention on Friday, July 31, during U.S. trading hours. The move aimed to counter what both governments described as “recent excessive volatility and disorderly movements” in the yen. They linked the action to the September 2025 Joint Statement of the Japanese and U.S. finance ministers and signaled readiness to repeat joint interventions to stabilize markets.
Bank of Japan data indicate Japan may have sold as much as $58.97 billion to buy yen in the New York market on Thursday, July 30. On Friday, the Federal Reserve Bank of New York executed euro-for-yen transactions on behalf of the U.S. Treasury, reportedly using Goldman Sachs and Morgan Stanley as counterparties. A photo from a cabinet meeting showed U.S. Treasury Secretary Scott Bessent’s handwritten note reading “Buy Japanese Yen (JPY) $5–10 bil,” suggesting a rough scale for U.S. participation, though no official amount was disclosed. Before Friday’s intervention, the Treasury notified several banks via the New York Fed to stand ready for possible action.
The yen had fallen to about ¥164 per dollar, its weakest level in roughly 40 years, before strengthening to around ¥157.57 on Friday after a sequence of Japan-only and coordinated operations. Tokyo’s Thursday move alone caused a sudden yen surge of up to 3.3% in New York trading.
Japan’s Ministry of Finance said it plans to use the Federal Reserve’s standing Foreign and International Monetary Authorities (FIMA) repo facility to obtain dollar liquidity for future interventions. Officials and analysts said this step aims to reduce the need for outright sales of U.S. Treasuries when financing operations, limiting spillovers into global bond markets.
U.S. officials framed Washington’s role as countering disorderly yen moves and supporting financial-market stability. President Donald Trump described the participation as a “signal of friendship” with Japan and “good for the world economy.”
Market strategists emphasized that interest-rate differentials between the U.S. and Japan and related yen carry trades remain the principal structural forces shaping the currency’s medium-term trajectory. These factors suggest interventions may provide only temporary relief. Japan’s large public debt also contributes to the yen’s weakness and volatility.
Both governments said they remain in close communication and attentive to market conditions. Japan’s finance minister stated the country “will not hesitate to conduct further coordinated interventions in the future,” and the U.S. Treasury pledged to participate in additional joint actions if needed.
