Japan and US Unite to Prop Up Slumping Yen

Japan and the United States have conducted coordinated yen-buying intervention to stem the yen's slide to fresh 40-year lows. This rare bilateral action aims to prevent a selloff in the yen and Japanese government bonds (JGBs) from causing global spillovers, such as adding upward pressure on already rising U.S. Treasury yields.

According to Japan's finance ministry, the joint intervention countered excessive volatility and disorderly movements in the Japanese yen in recent months. Finance Minister Satsuki Katayama said they will not hesitate to conduct further coordinated intervention if needed.

The yen surged more than 1% to 155.20 per dollar after the announcement, its strongest since early May and well off the 40-year low near 164 hit last month. Analysts believe this move may help address concerns over extraordinary weakness in the yen that offsets the boost from Trump's tariffs.

The Bank of Japan (BOJ) is also under scrutiny following the joint intervention. BOJ officials are signaling scope for a rate hike as soon as its next policy meeting in September, which could further strengthen the yen.