突然，全线跳水！

Group 1 - The core viewpoint of the article highlights a significant drop in gold and silver prices, with silver experiencing a decline of approximately 5% and gold falling below $4900 per ounce [1][4]. - The U.S. stock market futures also saw a decline across major indices, with the Nasdaq down 0.8%, the Nikkei 225 down 0.5%, and the FTSE China A50 futures dropping over 0.7% [4]. - Market analysts suggest that the current market behavior is defensive due to multiple market holidays and a lack of positive news, with traders closely monitoring developments between the U.S. and Iran, particularly following recent military exercises by Iran [6]. Group 2 - The ongoing geopolitical tensions, particularly the nuclear negotiations between Iran and the U.S., are contributing to market caution, as previous threats from the U.S. regarding Iran's nuclear program loom large [6]. - Analysts indicate that the reduced liquidity due to holidays in the U.S. and Asia may lead to market movements that are not indicative of broader trends, with remaining investors exhibiting cautious sentiment [6]. - The psychological impact of the late January crash in gold and silver prices, which occurred alongside stock market declines, continues to affect investor sentiment [6].