Yen Intervention Campaign Sparks Strongest Rally in Five Months

The Japanese yen has made a significant recovery in early September 2026, reaching its strongest reading against the US dollar in five months. The currency surged to around 155.8 per dollar after a record-breaking intervention campaign by Japanese authorities.

In July and August 2026, Japan spent a staggering ¥15.39 trillion buying yen, the largest intervention campaign ever recorded. This move was aimed at countering the persistent gap between US and Japanese interest rates, which had made it attractive for traders to borrow cheap yen and invest in higher-yielding dollar assets.

The BOJ Governor Kazuo Ueda has signaled openness to policy adjustments, while Finance Minister Satsuki Katayama and top currency official Atsushi Mimura have been vocal about restoring the yen to levels that better reflect economic fundamentals. US Treasury Secretary Scott Bessent has also made supportive comments about a stronger yen.

A stronger yen typically weighs on Japanese equities, particularly exporters whose overseas earnings shrink when converted back into a more expensive home currency. However, a stronger yen reduces hedging costs for Japanese institutions that hold foreign bonds, making these investments potentially more attractive.