贵金属深夜大跳水，白银跌近9%，美股三大指数全线收跌

Core Viewpoint - The U.S. stock market experienced a decline across all major indices, indicating a bearish sentiment among investors [2] Group 1: Stock Market Performance - On December 29, the Dow Jones Industrial Average fell by 0.51% [2] - The S&P 500 index decreased by 0.35% [2] - The Nasdaq Composite dropped by 0.5% [2] Group 2: Commodity Market Performance - International precious metals saw significant declines, with COMEX gold futures dropping by 4.45%, settling at $4,350.2 per ounce [2] - COMEX silver futures fell by 7.2%, priced at $71.64 per ounce [2] - Spot silver experienced a nearly 9% drop, nearing the $70 mark [2] - Spot palladium declined by over 15% [2] - Spot platinum decreased by more than 14% [2]