美股反弹，热门中概股分化，黄金再战4000美元

Market Overview - The U.S. stock market rebounded on Wednesday, driven by easing concerns over high valuations in tech stocks, optimistic corporate earnings, and better-than-expected economic data [3] - The Dow Jones Industrial Average rose by 225.86 points (0.48%) to close at 47,311.10 points, while the Nasdaq increased by 0.65% to 23,499.80 points, and the S&P 500 gained 0.37% to 6,796.29 points [3] Employment and Economic Indicators - The ADP reported a rebound in private sector employment for October, with an increase of 42,000 jobs, although signs of weakness in the labor market persist with ongoing layoffs in some sectors [3] - The ISM services PMI for October reached 52.4, marking the fastest expansion in eight months, primarily due to a rapid recovery in new orders [3] Valuation Concerns - Concerns about whether current high valuations can be sustained were raised by CEOs of major Wall Street firms like Morgan Stanley and Goldman Sachs, leading to significant declines in the stock market on Tuesday [5] - Economists suggest that despite some anxiety over high valuations, the overall environment remains supportive for the stock market due to stable economic growth and government spending increases [5] Interest Rates and Treasury Yields - Medium to long-term U.S. Treasury yields rose, with the 10-year yield increasing by 6.4 basis points to 4.16% and the 2-year yield up by 4.8 basis points to 3.63% [6] Individual Stock Movements - AMD saw a significant recovery, closing up 2.5%, which positively influenced other AI stocks, while Micron Technology and Broadcom also experienced gains of approximately 9% and 2%, respectively [6] - Ford and General Motors, which are sensitive to tariff risks, both saw their stock prices rise by over 2% amid reduced market bets on the continuation of tariffs [6] Commodity Prices - International oil prices weakened, with WTI crude oil falling by 1.59% to $59.60 per barrel and Brent crude down by 1.43% to $63.52 per barrel [6] - Gold prices rebounded due to safe-haven demand, with COMEX gold futures for November delivery rising by 0.83% to $3,980.30 per ounce [6]