收评：创业板指冲高回落跌0.15%，沪指盘中突破4000点大关

Market Overview - The market experienced a pullback after an initial rise, with all three major indices turning negative, while the ChiNext index briefly rose over 1% before retreating [1] - The Shanghai Composite Index broke through the 4000-point mark, reaching a ten-year high [1] - The total trading volume in the Shanghai and Shenzhen markets was 2.15 trillion yuan, a decrease of 192.3 billion yuan compared to the previous trading day [1] Sector Performance - The Fujian sector saw a surge, with over ten stocks hitting the daily limit, including Pingtan Development, which achieved six consecutive limit-ups in eight days [1] - The nuclear power sector was active, with Dongfang Tantalum Industry achieving three limit-ups in four days, and Antai Technology securing two consecutive limit-ups [1] - Robotics concept stocks performed strongly, with Qingdao Double Star and Yashichuangneng both achieving three consecutive limit-ups, alongside several other stocks hitting the daily limit [1] - The military industry sector experienced a rapid increase, with Jianglong Shipbuilding hitting the daily limit with a 20% rise [1] Declining Sectors - The non-ferrous metals sector collectively declined, with Tongling Nonferrous Metals hitting the daily limit down [1] - Sectors with the largest gains included Fujian, military, and port shipping, while non-ferrous metals, wind power equipment, and oil and gas sectors saw the largest declines [1] Closing Summary - At the close, the Shanghai Composite Index fell by 0.22%, the Shenzhen Component Index decreased by 0.44%, and the ChiNext Index dropped by 0.15% [1]