创业板指半日跌2.37%，科创50指数跌2.62%

Core Viewpoint - The market experienced a downward trend in early trading on October 17, with significant declines in major indices, reflecting a mixed performance across various sectors [1] Market Performance - The Shenzhen Component Index and the ChiNext Index both fell over 2% at one point during the trading session [1] - The total trading volume in the Shanghai and Shenzhen markets was 1.18 trillion, a decrease of 32.6 billion compared to the previous trading day [1] - By the end of the trading session, the Shanghai Composite Index fell by 1%, the Shenzhen Component Index by 1.99%, the ChiNext Index by 2.37%, and the Sci-Tech 50 Index by 2.62% [1] Sector Performance - Defensive sectors showed strong performance, with coal and gas stocks collectively rising; Da You Energy achieved five consecutive trading limits in six days, while Guo Xin Energy had three trading limits in four days [1] - The banking sector experienced fluctuations, with Agricultural Bank of China rising over 2% to reach a historical high [1] - Conversely, the data center power supply concept faced significant declines, with stocks like Igor and Zhongheng Electric hitting the daily limit down [1] - Major weight stocks such as Sunshine Power, ZTE, and Luxshare Precision saw substantial drops [1] Leading and Lagging Sectors - The sectors with the highest gains included gas, precious metals, port shipping, and coal [1] - In contrast, sectors such as wind power and photovoltaics experienced the largest declines [1]