Today’s shift · Currencies · Global economy
Washington and Tokyo intervene together to halt the yen’s slide.
After the yen fell to a 40-year low, the United States joined Japan in buying the currency. The immediate rebound was sharp; the larger shift is Washington’s renewed willingness to intervene directly in foreign-exchange markets.
The dollar had climbed above 163 yen before coordinated action by the United States and Japan drove it as low as roughly 155 on Monday. Japan’s finance ministry confirmed the joint intervention, and central-bank data suggested Tokyo may have spent as much as $36.6 billion buying yen. The Associated Press and Reuters both reported the operation and the currency’s unusually large move.
U.S. Treasury Secretary Scott Bessent said Washington was prepared to intervene again if yen trading became disorderly. He also urged a larger Federal Reserve backstop that would let foreign monetary authorities raise dollars against their Treasury holdings instead of selling those securities into the market. Intervention cannot erase the interest-rate gap that weakened the yen, but it changes the policy boundary around how far and how fast the currency may be allowed to fall.
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Why this is today’s shift
Japan has defended the yen before; direct, coordinated U.S. participation is the new element. Washington is treating extreme yen weakness as a shared financial-stability problem rather than Japan’s domestic problem alone.
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Why it matters
The yen sits at the center of global borrowing and investment flows, while Japan is one of the largest holders of U.S. government debt. A durable U.S.–Japan defense of the currency could affect carry trades, Treasury markets, Asian exchange rates, inflation in Japan, and expectations about when major governments will resist market-driven currency moves.
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What could happen next
Watch whether the yen holds its gains, whether the two governments intervene again, and whether the Federal Reserve expands its foreign-authority repo facility. Without narrower U.S.–Japan interest-rate differences, repeated intervention may slow depreciation without reversing its underlying cause.
Editorial confidence
High
The joint intervention and market move are confirmed by Japanese and U.S. officials and reported independently by AP and Reuters. Its lasting effectiveness is much less certain.
Reader reaction
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