美股三大股指跌破关键均线，金银大跌

Market Overview - The U.S. stock market closed lower amid escalating tensions in the Middle East and significant fluctuations in oil prices, leading to a renewed rise in inflation expectations and a cautious outlook on future interest rate cuts by the Federal Reserve [3][11] - The Dow Jones Industrial Average fell by 203.72 points to close at 46,021.43, a decline of 0.44%, while the S&P 500 and Nasdaq Composite also experienced declines of 0.27% and 0.28%, respectively, with all three major indices breaking below their 200-day moving averages, indicating a weakening mid-term trend [3][11] Sector Performance - Among the 11 major sectors in the S&P 500, 8 sectors declined, with the materials sector leading the drop at 1.55%, and the consumer discretionary sector falling by 0.87% [8] - Precious metals saw a significant pullback, leading to notable sell-offs in mining stocks, with Newmont down 6.9% and Freeport-McMoRan down 3.3% [8] Technology Stocks - Major tech companies faced pressure, with Nvidia down 1.02%, Microsoft down 0.71%, Apple down 0.39%, Meta down 1.46%, and Google-A down 0.18%. Tesla saw a more significant decline of 3.18% due to safety concerns regarding its fully autonomous driving system [5][8] Chinese Stocks - The Nasdaq Golden Dragon China Index fell by 1%, with Alibaba dropping 7.09% after reporting a 66.7% year-on-year decline in non-GAAP net profit for the quarter ending December 2025, despite a 2% increase in revenue [9] Economic Indicators - The U.S. labor market remains stagnant, with initial jobless claims decreasing to 205,000, below market expectations, indicating a tight labor market [12] - The yield on the two-year U.S. Treasury rose to 3.96%, the highest since August of the previous year, reflecting market adjustments to policy expectations [12] Commodity Prices - Brent crude oil prices briefly reached $119 per barrel due to attacks on Middle Eastern energy targets, while light crude oil futures closed at $96.14 per barrel, down 0.19% [13] - Precious metals experienced a significant decline, with spot gold dropping 4.3% to $4,612, marking a new low since early February, and silver down 5.3% to $71.39 [14]