沪指盘中站上3700点，全市场超4200股下跌

Market Overview - A-shares experienced a morning surge followed by a pullback, with the Shanghai Composite Index briefly surpassing 3700 points. The market showed significant divergence, with small and mid-cap stocks generally declining. The total trading volume in the Shanghai and Shenzhen markets reached 1.41 trillion yuan, an increase of 101.2 billion yuan compared to the previous trading day. Over 4200 stocks in the market declined [1]. Sector Performance - Financial stocks, including brokerages and insurance, showed strong fluctuations, with Changcheng Securities hitting the daily limit. Digital currency concept stocks were active, with Jingbeifang also reaching the daily limit. Brain-computer interface stocks experienced strong fluctuations, with Innovation Medical achieving five consecutive daily limits in eight days. Conversely, AI hardware stocks underwent adjustments, with Dongshan Precision and several others dropping over 5%. The insurance, digital currency, brain-computer interface, and securities sectors led in gains, while military, CPO, Xinjiang, and copper foil sectors saw the largest declines. By the end of the trading session, the Shanghai Composite Index rose by 0.2%, while the Shenzhen Component Index and the ChiNext Index fell by 0.15% and 0.23%, respectively [3].