USD/JPY Plunges in Suspected BOJ Intervention, Bearish Wedge Breaks

USD/JPY experienced a sharp and sudden plunge during the Asian session, dropping swiftly within a 15-minute window around 12:00 SGT, raising strong suspicions of a second round of Japanese authorities' currency intervention. The move triggered a bearish breakdown from a well-defined ascending wedge pattern, a technically significant development that often signals trend reversal or accelerated downside. The speed and magnitude of the decline closely resemble prior intervention episodes by the Bank of Japan and Ministry of Finance, which have historically acted to defend the yen when it weakens beyond tolerable levels. The breakdown from the ascending wedge confirms a shift in technical structure from bullish to bearish, with traders now watching for follow-through selling. Key support levels below the breakdown point will be critical in determining whether this move extends further. If intervention is confirmed, it could create sustained yen strength in the near term, as markets tend to respect official action. Traders should exercise caution with long USD/JPY positions and watch for official Japanese government commentary.