USD/JPY Plunges to 155.9 as Suspected Japanese Intervention Triggers Yen Rally

USD/JPY experienced a sharp decline on Friday, plunging to the 155.9 level in what traders widely suspect was direct intervention by Japanese authorities. The move came after Japan's Vice Finance Minister issued what was described as a "final warning" regarding excessive yen weakness, signaling Tokyo's diminishing tolerance for further depreciation. The steep drop represents a significant reversal from recent highs, where the pair had been trading well above the 158 level, indicating a multi-hundred pip move in the yen's favor. The Bank of Japan's stance on monetary policy normalization, combined with the Ministry of Finance's readiness to intervene in currency markets, has created a volatile environment for yen crosses. Traders should note that previous intervention episodes in 2022 and 2024 produced sharp but sometimes temporary reversals. Key support for USD/JPY now sits at the 155.0 psychological level, with resistance forming near 157.0. Market participants should exercise caution with yen pairs, as further intervention remains possible if authorities deem the pace of yen depreciation to be disorderly. Volatility is expected to remain elevated in the near term.