美三大股指涨跌互现，纳指标普500再创新高，英伟达涨2.2%

Market Overview - The technology sector showed strong performance, with the Nasdaq and S&P 500 indices reaching all-time highs on Wednesday, October 8. The Dow Jones Industrial Average fell by 1.20 points to 46,601.78, while the Nasdaq rose by 255.02 points, a 1.12% increase, closing at 23,043.38. The S&P 500 increased by 39.13 points, or 0.58%, to finish at 6,753.72. [1] - The market reacted calmly to the release of the Federal Reserve's September meeting minutes, which indicated internal disagreements on future rate cuts after the first anticipated cut in 2025. [1] Semiconductor Sector - Nvidia's stock rose by 2.20%, with CEO Jensen Huang noting a significant increase in demand over the past six months, particularly for their Blackwell product. He described the current period as the beginning of a new industrial revolution. [2] - Nvidia is reportedly participating in a new funding round for xAI, an AI startup led by Elon Musk, which is seeking to raise approximately $20 billion, with Nvidia potentially investing $2 billion. [2] - The Philadelphia Semiconductor Index increased by 3.40%, with AMD rising by 11.37%, Arm Holdings up by 4.66%, and TSMC gaining 3.57%. [2] - Analyst Ross Mayfield emphasized that while AI capabilities are impressive, the demand for chips and the software built on strong computing power must be supported by market demand, which currently remains stable. [2] AI Market Concerns - There are growing concerns about an AI bubble reminiscent of the late 1990s internet bubble, prompting market observers to advise investors to rebalance their portfolios. [3] - Mayfield noted that despite potential corrections in tech stocks, there may still be room for further gains before reaching a market peak. [3] - Major tech stocks generally saw increases, with Netflix up 1.95%, Amazon rising 1.55%, Tesla gaining 1.29%, Meta increasing by 0.67%, Apple up 0.62%, and Microsoft rising by 0.17%. [3] Gold and Oil Prices - International gold prices continued to rise, with spot gold increasing by 1.44% to $4,042.14 per ounce, and COMEX gold futures up by 1.43% to $4,061.70 per ounce. [4] - International oil prices also saw an uptick, with WTI crude oil futures rising by $0.82, or 1.33%, to $62.55 per barrel, and Brent crude oil futures increasing by $0.80, or 1.22%, to $66.25 per barrel. [5]