澳元兑日元汇率正在攀升至36年来的高位水平[1]。这一走势与日元长期疲弱密切相关，而日元贬值的根本原因在于日本央行与美国的利率差异[1]。日本央行基准利率约为1%，远低于美国和澳大利亚3%至4%以上的水平[1]，这种利差吸引投资者从日本借入低成本资金投资高收益资产，形成套利交易压力[1]。
鉴于日元贬值带来的风险，美国和日本政府在7月底采取了罕见的联合市场干预行动[1]。美联储和日本央行在单一交易日内购买了数百亿美元的日元，以支撑其升值[1]。两国政府采取这一措施出于各自的考量：日本希望缓解进口成本上升压力，而美国则担忧日元持续贬值可能导致日本抛售美国国债，进而推高美国利率[1]。日元曾一度触及自1986年以来对美元的最低水平[1]。2024年日本央行加息后，投资者随即抛售了数百亿美元资产以平仓套利交易[1]，进一步加剧了汇率波动。
The Australian dollar has been rising back toward a 36-year peak against the Japanese yen, driven by significant disparities in monetary policy between Japan and other major economies.[1] The yen has weakened considerably, reaching its lowest level against the US dollar since 1986.[1]
In response to the yen's sustained depreciation, the US and Japanese governments took the unusual step of coordinating joint market intervention in late July, with the Federal Reserve and Bank of Japan purchasing billions of dollars of yen in a single day.[1] The two countries supported the yen's appreciation for different reasons: Japan sought to ease pressure on import costs, while the United States was concerned that continued yen weakness could prompt Japan to divest from US Treasury holdings, potentially raising American interest rates.[1]
The yen's weakness reflects structural differences in monetary policy. The Bank of Japan maintains a benchmark interest rate of approximately 1 percent, significantly lower than the 3 to 4 percent-plus rates offered by the United States and Australia.[1] This interest rate gap has fueled substantial carry-trade activity, where investors borrow in yen at lower costs to invest in higher-yielding assets elsewhere. When the Bank of Japan raised rates in 2024, investors liquidated hundreds of billions of dollars in assets to unwind these trades.[1] Japan's current account surplus reached a historical high in the first half of 2024, reflecting the country's strong trade position.[1]
