US Joins Japan in Historic Yen Intervention

The US and Japan coordinated a joint yen-buying operation on July 31, 2026, in an effort to stabilize the yen's value. This intervention was the first of its kind since 1998 and marked the first time the two countries have collaborated on currency market management.

The move was motivated by concerns over Japan's massive holdings of US Treasury securities, valued at $1.203 trillion as of mid-2026. If Tokyo were to sell these bonds to defend its currency, it would not only weaken the yen but also push up US bond yields and increase borrowing costs for American consumers.

The intervention saw Japan spend an estimated $59 billion in a single day before Washington stepped in to join the operation. The joint effort totaled approximately $95.5 billion in yen purchases over two days, with the US Treasury adding dollar-buying pressure on the yen through its own account.