午评：创业板指半日跌1.35% 合成生物概念股逆势大涨

Market Overview - The market experienced fluctuations in the morning session, with the ChiNext Index leading the decline, down 1.35% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 740.4 billion, an increase of 23.6 billion compared to the previous trading day [1] - Overall, more than 3,600 stocks declined across the market, indicating a broad-based sell-off [1] Sector Performance - Synthetic biology stocks surged against the trend, with companies like Jindawei hitting the daily limit [1] - Port and shipping stocks maintained strong performance, with Nanjing Port also reaching the daily limit [1] - The ST (Special Treatment) sector showed renewed strength, with over 20 stocks, including ST Huapeng, hitting the daily limit [1] - Conversely, computing power concept stocks underwent adjustments, with Hongjing Technology dropping nearly 10% [1] Index Performance - By the end of the session, the Shanghai Composite Index fell by 0.42%, the Shenzhen Component Index decreased by 1.12%, and the ChiNext Index dropped by 1.35% [1]