U.S. stock night trading fluctuations: Double blow from high valuation and commercialization challenges, Rigetti Computing fell 3.02% in after-hours trading

U.S. Stock Night Market Movements Rigetti Computing fell 3.02% in the night market. Based on recent news, On December 14, analysts pointed out that the valuations of Rigetti and D-Wave are unreasonable, leading to investor concerns about Rigetti's high valuation and a subsequent drop in stock price. On December 14, analysts believed that Rigetti's stock price increase was mainly due to the overall market trend rather than improvements in the company's fundamentals, recommending a neutral rating. On December 15, analysts noted that Rigetti's price-to-sales ratio is far above the average level in the tech industry, and investors have overly high expectations for the company's future revenue growth, putting pressure on the stock price. The quantum computing industry faces commercialization challenges, and market sentiment is cautious. Stocks with High Trading Volume in the Industry Nvidia fell 0.86% in the night market. Based on recent key news: On December 15, Nvidia announced the acquisition of AI software company SchedMD, aiming to strengthen its AI ecosystem by increasing investment in open-source technology to cope with industry competition. This move is seen as an important strategy for Nvidia to maintain its leadership in the AI field, attracting attention to its stock price. On December 15, market news indicated that Nvidia would hold a closed-door summit at its headquarters to discuss the power shortage issues in data centers. This news raised market concerns about the power supply bottlenecks in AI development, affecting Nvidia's stock performance. On December 15, a report from CITIC Securities pointed out that the U.S. government has allowed Nvidia to resume sales of H200 chips to China, which is expected to alleviate the computing resource shortages in China's AI industry in the short term and boost market confidence. The AI industry is highly competitive, and power supply has become a bottleneck. Broadcom fell 1.62% in the night market. Based on recent key news: On December 15, Broadcom warned that the increase in low-margin AI processor sales is compressing profitability, causing the stock price to plummet over 11%. Investor doubts about AI investment returns have intensified, putting pressure on tech stocks. Source: Reuters On December 13, Broadcom's financial report did not meet market expectations, leading to a stock price crash of over 11%. Market concerns about the AI bubble have intensified, putting pressure on tech stocks in general. Source: Now News Channel On December 15, Broadcom's backlog reached $73 billion, falling short of the most optimistic expectations, disappointing investors. The stock price declined, and the market holds a cautious attitude towards the prospects of the AI business. Source: Bank of America Securities report, tech stocks under pressure, AI bubble concerns intensify. AMD fell 1.88% in the night market. Based on recent key news: On December 11, AMD's board chair Lisa Su met with Chinese Ambassador to the U.S. Xie Feng to discuss AMD's operations in China and Sino-U.S. economic and trade cooperation. This move may affect market expectations for AMD's business in China, leading to stock price fluctuations. (Embassy of China in the United States) On December 11, AMD Chairman Lisa Su submitted a plan to sell 125,000 shares, raising concerns in the market about the confidence of company insiders in the stock price, leading to a 2% drop in the stock price. (Bloomberg) On December 15, AMD announced it would shift some manufacturing to Samsung to respond to the growing demand for AI chips. This move may affect the market's perception of AMD's supply chain stability, leading to stock price fluctuations. (Bloomberg) The demand for AI chips is strong, and industry volatility is increasing