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Core Viewpoint - The article discusses a sudden shift in the US stock market, particularly highlighting the significant decline in major technology stocks, which had previously driven the indices to new highs. Concerns over poor earnings and the potential AI bubble are central to this downturn [1][10]. Group 1: Market Performance - On a recent Thursday, all three major US stock indices fell, with the Dow Jones down 0.23%, the S&P 500 down 0.99%, and the Nasdaq Composite down 1.57%, ending a streak of record highs [1]. - Major tech stocks experienced significant declines, with Meta dropping 11.33%, Microsoft down 2.9%, and the Philadelphia Semiconductor Index falling 1.53%, where 22 out of 30 component stocks declined [2]. Group 2: Earnings and AI Concerns - The poor earnings guidance for Q4 from eBay led to a nearly 16% drop in its stock price, marking the largest decline since 2008 [2]. - Analysts express concerns about the sustainability of the AI-driven market rally, suggesting that the enthusiasm for AI may have led to inflated valuations and potential market bubbles [10]. Group 3: Chinese Stocks and Cryptocurrency - The Nasdaq China Golden Dragon Index fell by 1.88%, with many popular Chinese stocks also declining, including Xiaoma Zhixing down 6.79% and Baidu down 4.54% [4]. - The cryptocurrency market faced a significant downturn, with major digital currencies dropping over 6%, leading to a total liquidation of nearly $1.1 billion across the market [6][8]. Group 4: Commodity Market Response - As market risk aversion increased, gold prices surged, closing up 2.44% and surpassing $4000. The World Bank projects a 42% increase in gold prices by 2025 [8].