道指暴泻近900点！科技、中概板块重挫、国际金价重夺4000美元关口

Market Overview - The U.S. stock market experienced a significant decline, with major indices falling sharply due to renewed concerns over geopolitical tensions and trade policy uncertainty [1] - The CBOE Volatility Index (VIX) rose to its highest level since mid-June, indicating increased market fear [1] Index Performance - The Dow Jones Industrial Average dropped by 878.82 points, closing at 45479.60, a decrease of 1.9% - The S&P 500 fell by 182.6 points to 6552.51, down 2.71% - The Nasdaq Composite decreased by 820.2 points, ending at 22204.43, a decline of 3.56% - Both the S&P 500 and Nasdaq recorded their largest single-day drops since April [1] Weekly Performance - For the week, the S&P 500 declined by 2.43%, the Dow Jones fell by 2.73%, and the Nasdaq dropped by 2.53% [2] Sector Performance - The semiconductor sector was notably affected, with the Philadelphia Semiconductor Index falling by 6.3% [3] - Major tech stocks saw significant declines, including Broadcom down 5.9%, Tesla down 5.1%, Amazon down approximately 5%, and Nvidia down 4.9% [2] Chinese Stocks - Chinese stocks also faced pressure, with the Nasdaq Golden Dragon China Index dropping by 6.1% - Alibaba fell over 8%, Pinduoduo down over 5%, JD down over 6%, and NIO down over 10% [3] Bond Market - The yield on the 10-year U.S. Treasury bond decreased by 9.1 basis points to 4.057%, the lowest in over a month - The 2-year Treasury yield fell by 7.5 basis points to 3.512% [3] Economic Indicators - The University of Michigan's preliminary consumer confidence index for October remained at historically low levels, with inflation and employment outlooks dampening consumer sentiment [3] - Federal Reserve officials indicated a cautious and gradual approach to future monetary policy adjustments, with potential rate changes of 25 basis points [3] Commodity Market - The commodity market saw increased volatility, with international oil prices significantly declining; WTI crude oil futures fell by 4.24% to $58.90 per barrel, and Brent crude oil futures dropped by 3.82% to $62.73 per barrel [4] - In contrast, COMEX gold futures rose by 0.70%, closing at $4000.4 per ounce, supported by safe-haven buying [5]