A股，突变！科技股大调整！

Core Viewpoint - The A-share market experienced a narrow fluctuation on October 10, 2023, with significant adjustments in the ChiNext and Sci-Tech 50 indices, leading to declines in major indices [1][5]. Margin Trading Scale - As of October 9, 2023, the margin trading balance in the Shanghai, Shenzhen, and North markets reached 24,455 billion, setting a new historical high. The single-day increase on October 9 was approximately 514 billion, marking the second highest single-day growth in history [3][4]. - The financing balance also reached a record high of 24,292 billion, with a single-day increase of about 508 billion on October 9, which is the second highest level recorded [4]. Index Performance - The ChiNext index saw a decline of over 3% during the session, with stocks like XianDao Intelligent dropping more than 14% [6]. - The Sci-Tech 50 index experienced a more significant drop, exceeding 4% at one point, following a recent peak that marked a four-year high [7][8]. Stock Adjustments - Several brokerage firms adjusted the margin trading collateral ratio for multiple stocks, including SMIC, to 0, based on exchange regulations regarding risk warnings and financial metrics [9]. Sector Performance - In terms of sector performance, the building materials, textile and apparel, coal, and beauty care sectors saw gains, while the power equipment, electronics, and computer sectors faced declines [10]. New Stock Listing - A new stock, Aomeisen, was listed on the market, with its price surging over 380% during the session. The company specializes in intelligent equipment manufacturing, focusing on smart production devices and lines applicable across various industries [11][12].