The Japanese yen gained 0.3 percent against the U.S. dollar Monday, trading at 148.50 per dollar, after a 2.5 percent rebound last week driven by coordinated currency intervention from Japan and the United States.
Last week's operations involved direct yen purchases by the Bank of Japan, acting on behalf of the Ministry of Finance. The U.S. Treasury Department participated—marking its first joint intervention to support the yen in over two decades.
President Trump publicly supported Japan's stabilization efforts, saying a weaker yen hurts U.S. exporters and distorts global trade balances.
Before intervention, the yen had depreciated 14 percent against the dollar this year, reaching 152.40 per dollar in late July—its lowest level since 1990—driven by widening interest rate differentials.
The Bank of Japan holds its short-term interest rate target at 0.1 percent, against the Federal Reserve's target range of 5.25 percent to 5.50 percent. That 500-basis-point gap reduces the appeal of yen-denominated assets to global investors.
Treasury Secretary Scott Bessent confirmed U.S. involvement, saying excessive currency volatility harms international trade and investment.
Japan last intervened in October 2022, selling dollars to support the yen. That unilateral action had limited lasting effect; the yen resumed its decline within weeks.
The durability of intervention without a shift in monetary policy remains a concern. Continued interest rate divergence pressures the yen lower, requiring repeated large-scale operations to hold any given level.
Market participants estimate Japan spent approximately $35 billion in last week's operations—approaching the $40 billion deployed during the September-October 2022 interventions.
Japanese multinationals such as Toyota Motor Corporation and Sony Group Corporation typically benefit from a weaker yen through higher repatriated earnings. A rapidly depreciating yen, however, raises import costs for energy and raw materials, pressuring domestic consumers and businesses.
Federal Reserve Chair Kevin Warsh has maintained a hawkish policy stance, saying U.S. interest rates will remain elevated until inflation consistently reaches the 2 percent target—sustaining the rate differential that drives yen weakness.
