US Treasury Intervenes in Markets to Support Japanese Yen

The U.S. Treasury Department intervened directly in the foreign exchange market to support the Japanese Yen, following the currency's decline to near four-decade lows against the dollar. This move signifies a rare and substantial shift in U.S. policy regarding direct intervention in exchange rates. The Federal Reserve Bank of New York facilitated these transactions by selling euros and purchasing yen on behalf of the Treasury.

The intervention took place on Friday, July 31, 2026. Prior to the direct action, the Treasury had informed several banks about potential intervention, asking them to "stand ready for future action." This move followed earlier apparent intervention by Japanese authorities on Thursday, with Bank of Japan data suggesting Japan may have sold as much as $58.97 billion to purchase yen. A notable incident involved a leaked "to-do" list of U.S. Treasury Secretary Scott Bessent, photographed by Reuters, which explicitly showed plans to "Buy Japanese Yen (JPY) $5-10 bil." Goldman Sachs Group Inc. and Morgan Stanley were reportedly involved in conducting the trades on behalf of the Treasury.

Reports of the U.S. intervention significantly bolstered the Japanese currency against the dollar during Friday's trading session. The yen had been trading near its lowest levels in four decades against the dollar. The coordinated action led to a substantial strengthening of the yen, with the dollar dropping against the Japanese currency. For instance, the dollar fell from approximately 158.9 yen to about 157.6 yen in late afternoon trading on Friday, a decline of about 0.8%. The yen's appreciation against the dollar in New York trading reached as much as 3.3%.

The prolonged weakness of the yen has been a significant concern for Japan, exacerbating import costs and contributing to inflationary pressures. The divergence in monetary policies, with the Bank of Japan maintaining ultra-loose stances while the U.S. Federal Reserve pursued rate hikes, has been a primary driver of the yen's depreciation. This coordinated intervention underscores the growing concern among G7 nations regarding currency volatility and its potential impact on global economic stability. U.S. Treasury Secretary Scott Bessent had previously stated that the Japanese yen was trading below its appropriate level and that excessive currency volatility was unhealthy. The U.S. last intervened to prop up the yen in 2011, when it joined other G7 countries in a coordinated action following the devastating Tōhoku earthquake and tsunami.

Analysts view this coordinated action as a significant escalation in efforts to support the yen, potentially signaling a more active role for the U.S. in managing global currency stability. The sustainability of the yen's rebound will hinge on future policy signals from both the U.S. Treasury and the Bank of Japan, as well as the Federal Reserve's stance. Further coordinated interventions might be considered if currency volatility persists, especially given the explicit support from U.S. officials for Japan's currency moves. Markets will closely monitor any further communications from these central authorities regarding their future intentions.