U.S., Japan confirm coordinated yen intervention, signal more action if needed

• The intervention marked a rare joint currency operation by the U.S. and Japan, executed under a September 2025 Joint Statement of Finance Ministers
• U.S. Treasury Secretary Scott Bessent endorsed Japan's efforts to 'correct the substantial undervaluation of the yen' and confirmed willingness to participate in further joint interventions
• Japan plans to utilize the Federal Reserve's FIMA repo facility, which allows foreign central banks to obtain short-term dollars by temporarily exchanging U.S. Treasury securities

Summary: U.S.-Japan Coordinated Yen Intervention

Key Facts and Figures

Japan's Finance Ministry and the U.S. Treasury conducted a rare coordinated yen-buying intervention on Friday to address excessive currency volatility. The yen strengthened from 163.73 per dollar on Thursday to 157.57 on Friday, trading at 157.70 on Monday following the announcement.

Main Parties Involved

Japan: Finance Minister Satsuki Katayama and the Ministry of Finance executed the intervention, with plans to utilize the Federal Reserve's FIMA (Foreign and International Monetary Authorities) repo facility for future short-term dollar access.

United States: Treasury Secretary Scott Bessent confirmed the coordinated action, characterizing it as countering "disorderly yen movements." President Trump framed the intervention as a "gesture of friendship" to support a key ally.

Market Implications

Both nations signaled readiness for additional interventions, with explicit statements that they "will not hesitate" to act again. The intervention was conducted under a Joint Statement from September 2025 and aims to address what officials termed the "substantial undervaluation of the yen."

The U.S. Treasury endorsed Japan's broader monetary policy direction, suggesting continued support for yen stabilization efforts. This marks an unusual display of bilateral currency cooperation, as coordinated interventions between major economies are relatively rare.

Strategic Context

Trump emphasized the intervention served dual purposes: supporting a critical ally and promoting global economic stability. The coordinated approach signals both countries remain in close communication and on alert for further currency volatility, potentially deterring speculative trading against the yen.