美国、日本和韩国本周实施了近三十年来最大规模的协调外汇干预[3]。美国财政部罕见直接参与日元干预，通过纽约联储委托高盛、摩根士丹利出售欧元、买入日元，这是近30年来的首次[3]。日本当局同时动用约8.45万亿日元（约528亿美元）支撑日元[3]，韩国外汇当局也罕见入市抛售美元[3]。美国财政部长Scott Bessent表示强烈支持日本采取的果断市场行动和货币政策步骤，以纠正日元的大幅贬值[2]。
此前日元兑美元曾跌至40年低点164日元[2]。干预后美元兑日元迅速从162跌至157-159区间[3]。日本财务省国际事务副大臣Atsushi Mimura指出，美方支持已"超越单纯的道义声援"[3]。这是自2011年地震海啸以来美日首次联合干预[2]。日本财政部和美国财政部表示未来如需要将继续进行联合干预[2]。此举旨在防止日元和日本政府债券大幅抛售对全球经济造成影响[2]。
The US and Japan confirmed coordinated intervention in foreign exchange markets to arrest the sharp depreciation of the yen, marking the first such collaborative action since 2011.[2] The US dollar fell sharply following the announcement, declining from above 163 yen per dollar to 156.34 yen, representing a roughly 1% drop after reaching a 40-year high.[1] The intervention aims to prevent substantial undervaluation of the yen and protect against potential spillover effects on the broader global economy through forced selling of the yen and Japanese government bonds.
On July 30 and 31, Japanese authorities deployed approximately 8.45 trillion yen, equivalent to roughly $528 million USD, to support their currency.[3] Japan sold approximately $59 billion in the New York market on Thursday to purchase yen.[2] The US Treasury Department took the rare step of directly participating in yen support for the first time in nearly three decades, instructing the New York Federal Reserve to sell euros and purchase yen through Goldman Sachs and Morgan Stanley on July 31.[3] US Treasury Secretary Scott Bessent stated: "We strongly support Japan's decisive market and monetary steps to correct the substantial undervaluation of the yen."[2] According to a photograph of Bessent's notebook, the US intervention scale was indicated as "Buy Japanese Yen $5-10 bil."[2]
The currency market responded swiftly to the coordinated action, with the dollar-to-yen exchange rate declining from 162 to the 157-159 range.[3] South Korea also joined the intervention effort, with Korean authorities unusually entering the market to sell dollars, driving the Korean won to a single-day appreciation of 2%.[3] Japanese Vice Minister of Finance for International Affairs Atsushi Mimura indicated that American support had "transcended mere moral backing."[3] Both the Japanese Finance Ministry and US Treasury signaled their willingness to conduct additional joint interventions if market conditions warrant further action.[2]
