全球外汇市场迎来重磅信号。一场由美国央行参与、针对日元的"口头干预"行动，正迫使交易员重新评估美元/日元的前景，并为潜在的协同货币 干预做好准备。这标志着美国对外汇市场的态度可能发生重大转变。 行动的核心是上周五纽约联储代表美国财政部进行的"利率检查"。此举被市场广泛解读为美日官方可能协同入市支持日元的最强烈"口头"警告。 日本财务大臣片山皋月随后表态，政府正根据美日联合声明的精神应对汇率波动，进一步强化了两国协调行动的猜测。 此次事件迅速在外汇市场掀起波澜。美元/日元汇率从周五高点159.23急速下跌，周一早间一度跌破154关口，创下年内最大单日跌幅之一。期权 市场亦剧烈反应，短期波动率预期飙升，显示交易员正紧急为潜在的干预风险定价。 | 概览 | 图表 | | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1m | 5m | 15m | 30m | 1H | 4H | 1D | 1W | 1M | | | | N | | 154.50 | | | | ...

Core Viewpoint - Nomura warns that the rules of intervention by the Japanese Ministry of Finance regarding the yen are changing, indicating a significant increase in intervention risk as market volatility suggests a shift from verbal warnings to tactical preparations [1] Group 1: Market Behavior and Intervention Signals - The sudden drop in USD/JPY during the UK trading session, without any apparent positive news for the yen, is likely a result of a "Rate Check" by the Ministry of Finance, which often precedes actual intervention [4] - Historical context shows that after a similar "Rate Check" on September 14, 2022, the Japanese government intervened with a substantial amount of 2.8382 trillion yen (approximately $19.8 billion) just eight days later, suggesting that current market movements may signal impending intervention [4] Group 2: Caution Against Overreliance on Indicators - Nomura advises against placing too much faith in the so-called "Kanda Line," a set of intervention warning indicators, as no signals are currently active; however, this does not imply a low risk of intervention [5] - The former Finance Minister Kanda acknowledged that intervention decisions are not based on these indicators in an automated manner, highlighting the need for vigilance [5][6] Group 3: Broader Focus on Currency Pairs - The scope of the Ministry of Finance's intervention may be expanding beyond just USD/JPY, as new foreign exchange affairs chief Mimura indicated that authorities are monitoring various currency pairs, not solely focusing on the dollar-yen relationship [7] - Reports suggest that the Ministry conducted a "Rate Check" on EUR/JPY in July 2024, indicating potential alternative intervention strategies to curb yen weakness without directly purchasing yen [7][8] - Historical interventions by Japan around the year 2000 targeting EUR/JPY suggest that investors should be cautious and not solely focus on USD/JPY, as they may be caught off guard by unexpected actions [8]