A股收评：成交额再爆天量逼近4万亿元！三大指数涨跌不一，AI应用持续爆发

Market Overview - The A-share market saw the three major indices rise in the morning but collectively declined in the afternoon, with the Shanghai Composite Index down by 0.31% to 4126 points, while the Shenzhen Component Index and the ChiNext Index rose by 0.56% and 0.82%, respectively [1] - The total market turnover reached a record high of 3.99 trillion yuan, an increase of 288 billion yuan compared to the previous trading day, with over 2700 stocks rising and nearly 2600 stocks falling [1] Sector Performance - Pinduoduo's internal testing of the "100 Billion Supermarket" led to a rise in related stocks, with companies like Zhiding and Xinhua Du hitting the daily limit [1] - AI application stocks continued to surge, with sectors such as Kimi concept, AI corpus, and intelligent agents leading the gains, resulting in stocks like Zhejiang Wenlian and Liou Co. hitting the daily limit [1] - The internet sector also saw gains, with companies like Guangyun Technology and Hongjing Technology hitting the daily limit [1] - Conversely, the insurance sector declined, with China People's Insurance leading the losses [1] - Lithium mining concepts fell sharply, with Zhongmin Resources dropping over 7% [1] - The aircraft carrier concept weakened, with stocks like Beidou Star Communication hitting the daily limit [1] - Banking, robotic actuators, and aviation airport sectors experienced significant declines [1] Top Gainers - The top sectors by net capital inflow included energy equipment (+6.73%), software (+4.86%), and internet (+3.10%) [2] - Other notable sectors with gains included cultural media (+3.06%), petroleum and chemical (+2.80%), and computer hardware (+2.41%) [2]