突发！寒武纪跌超12%，市值蒸发超700亿元

Group 1 - The stock of Cambrian has experienced a significant decline, dropping over 12% on September 4, with a market value of 513.8 billion yuan, resulting in a loss of over 70 billion yuan in a single day [1] - Cambrian's stock price has retraced more than 20% from its peak of 1595.88 yuan after becoming the highest-priced stock, surpassing Kweichow Moutai on August 28 [4] - The recent adjustment in Cambrian's stock is linked to an index adjustment announcement by the Shanghai Stock Exchange, which will reduce its weight in the Sci-Tech 50 index from approximately 15% to 10% effective September 12, 2025 [4] Group 2 - Cambrian's half-year report indicates that the Huaxia and E Fund's Sci-Tech 50 index funds are significant shareholders, collectively holding over 4.7% of the company's shares [4] - On August 28, Cambrian issued a risk warning regarding its stock trading, highlighting a 133.86% increase in its closing price from July 28 to August 28, which is significantly higher than most peers and major indices [4] - The company has projected an estimated annual revenue of 500 million to 700 million yuan for 2025, emphasizing that these forecasts are preliminary and do not constitute a commitment to investors [5]