黄金白银，暴跌

Core Viewpoint - The precious metals market experienced a significant downturn, referred to as "Black Monday," with substantial declines in gold and silver prices, impacting related stocks and indices [1]. Group 1: Precious Metals Performance - COMEX gold futures fell by 4.45%, closing at $4,350.2 per ounce [1]. - COMEX silver futures plummeted by 7.2%, ending at $71.64 per ounce [1]. - Spot gold dropped over 4%, while spot silver fell more than 9% [1]. - Spot palladium and platinum saw declines of over 15% and 14%, respectively [1]. Group 2: Impact on Mining Stocks - U.S. silver mining stocks experienced significant losses, with Harmony Gold down over 8%, AngloGold down nearly 7%, and Pan American Silver down over 5% [1]. - Kinross Gold fell by more than 5%, and Barrick Gold dropped over 4% [1]. Group 3: Margin Requirement Changes - CME Group announced an increase in margin requirements for futures contracts related to silver, gold, platinum, palladium, and lithium, effective after market close on December 29 [1]. Group 4: Broader Market Impact - The U.S. stock market saw all three major indices decline, with the Dow Jones down 0.51%, S&P 500 down 0.35%, and Nasdaq down 0.5% [1]. - Major tech stocks also faced declines, with Tesla down over 3% and Nvidia down more than 1% [1]. - Chinese concept stocks mostly fell, with the Nasdaq Golden Dragon China Index down 0.67% [1].