突发警告！AI泡沫，或引发“剧烈的市场回调”

Market Overview - The A-share market opened positively after the long holiday, with the Shanghai Composite Index rising 1.32% to close above 3900 points, marking the highest level since August 2015 [3][4] - The Shenzhen Component Index increased by 1.47%, while the ChiNext Index rose by 0.73% [3][4] - A total of 3115 stocks in the market rose, with 99 stocks hitting the daily limit up, while 2186 stocks declined [4] Sector Performance - Gold stocks surged due to the rise in spot gold prices, with companies like Sichuan Gold and Shandong Gold hitting the daily limit up [6] - The rare earth permanent magnet sector also saw significant gains, with Northern Rare Earth and others reaching the daily limit up following export control measures by the Ministry of Commerce [8] - The controlled fusion concept stocks experienced a breakout, with companies like Guoguang Electric and China National Nuclear Power also hitting the daily limit up [7] Technology Sector Concerns - The Bank of England warned of a potential "severe market correction" if the AI bubble bursts, highlighting that valuations appear significantly inflated, particularly among tech companies focused on AI [9][10] - The central bank noted that geopolitical tensions, trade and financial market divergence, and pressures in sovereign debt markets are increasing related risks [10] - The concentration of market capitalization among the top five companies in the S&P 500 is at its highest level in 50 years, raising concerns about market vulnerability if expectations around AI diminish [11] Investor Sentiment - As the earnings season begins, investors are closely monitoring AI-related stocks, with some strategists asserting that tech company valuations are supported by solid fundamentals [12] - Goldman Sachs remains cautiously optimistic, suggesting that a bubble has not yet formed but advises investors to diversify their portfolios [12] - The Bank of England cautioned that potential downtrends include slower-than-expected AI capabilities and applications, as well as increased industry competition, which could lead to a reassessment of current high-profit expectations [12]