A股突变，科技股大调整

Market Overview - The A-share market experienced narrow fluctuations on October 10, with significant adjustments in the ChiNext and Sci-Tech 50 indices, closing with the Shanghai Composite Index down 0.51%, the Shenzhen Component Index down 1.85%, and the ChiNext Index down 3.40% [1][6] Margin Trading - As of October 9, the margin trading balance in the Shanghai, Shenzhen, and North markets reached 24,455 billion, setting a new historical high, with a single-day increase of approximately 514 billion, marking the second highest single-day growth on record [3][4] - The financing balance also reached a record high of 24,292 billion, with a single-day increase of about 508 billion, also the second highest single-day growth [4] Stock Performance - The ChiNext Index saw a significant drop, with some constituent stocks like XianDao Intelligent falling over 14%, while the Sci-Tech 50 Index dropped more than 4% during the session, with stocks like Jinghe Integrated and Baiwei Storage leading the declines [5][7][6] - Several brokerage firms adjusted the margin trading collateral ratios for multiple stocks, including SMIC, to 0, following exchange regulations regarding risk warnings and high static P/E ratios [7] New Listings - A new stock, Aomeisen, was listed today, experiencing a peak increase of over 380% during trading. The company specializes in intelligent equipment manufacturing, focusing on the R&D, design, production, and sales of smart production equipment applicable in various industries [8]