U.S., Japan confirm coordinated yen intervention, signal readiness for more

• The yen had weakened to 163.73 per dollar on Thursday before the intervention strengthened it to 157.57 on Friday, with Monday trading at 157.70
• Both U.S. Treasury Secretary Scott Bessent and Japan's Finance Minister confirmed readiness for further joint interventions, citing close ongoing communication
• 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 Development:

Japan's Finance Ministry and the U.S. Treasury confirmed they conducted a coordinated yen-buying intervention on Friday, marking a rare joint currency market operation between the two allies. Both nations have signaled readiness for additional interventions if necessary.

Market Data:

• The yen reached 163.73 against the dollar on Thursday before strengthening to 157.57 on Friday following the intervention
• The currency was trading at 157.70 per dollar on Monday, maintaining its gains

Official Statements:

U.S. Treasury Secretary Scott Bessent confirmed the action was intended to "counter disorderly yen movements," while Japanese Finance Minister Satsuki Katayama emphasized close communication between the two nations. Both officials stated they "will not hesitate" to conduct further joint interventions. President Trump characterized the move as "a signal of friendship" and support for Japan amid their strong bilateral relationship.

Policy Framework:

The intervention was executed under a Joint Statement issued by Japanese and U.S. Finance Ministers in September 2025, aimed at addressing "excessive volatility and disorderly movements of the yen." Japan also announced 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.

Market Implications:

The coordinated action signals strong policy alignment between the world's largest and third-largest economies on currency stability. Bessent's endorsement of Japan's efforts to correct the "substantial undervaluation of the yen" suggests sustained support for yen appreciation, potentially impacting carry trades and regional currency markets. Traders remain on alert for possible future interventions.