降息，突变！美联储重磅，特朗普发声！美股、黄金集体拉升！

Group 1: U.S. Stock Market Performance - The U.S. stock market saw a collective rise, with all three major indices recording a four-day winning streak as of December 23, with the S&P 500 reaching a new closing high [1] - Major tech stocks mostly increased, with Nvidia rising over 3%, Google and Amazon up more than 1%, while Tesla and Intel experienced slight declines [1] - The Nasdaq Golden Dragon Index, which tracks Chinese stocks, fell by 0.58%, with notable declines in companies like Xiaoma Zhixing and NIO [1] Group 2: Precious Metals Market - International gold and silver prices continued to surge, with spot gold breaking the $4500 per ounce mark for the first time during the Asian trading session on December 24 [2] - COMEX gold futures rose by 1.02% to $4515 per ounce, while silver futures increased by 4.44% to $71.61 per ounce [2] - Platinum prices surged over 7%, reaching a historical high of $2277.05 per ounce, and palladium also saw a significant increase of 7% [2] Group 3: Federal Reserve and Interest Rates - U.S. Treasury Secretary Mnuchin supports re-evaluating the Federal Reserve's inflation target after it stabilizes at 2%, suggesting a potential range adjustment [4] - The White House's economic advisor Hassett noted that the U.S. is lagging behind global trends in interest rate cuts [5] - President Trump expressed his desire for the next Federal Reserve chair to lower rates when the market performs well, emphasizing the importance of market stability [5]