午评：创业板指半日跌0.83% AI应用概念持续活跃

Market Overview - The ChiNext Index experienced a high and then a decline, dropping over 1% at one point during the early session on January 13. The total trading volume for the Shanghai and Shenzhen markets reached 2.44 trillion yuan, an increase of 128.3 billion yuan compared to the previous trading day [1] - The overall market saw over 2800 stocks decline, with the Shanghai Composite Index down 0.03%, the Shenzhen Component Index down 0.31%, and the ChiNext Index down 0.83% [1] Sector Performance - The AI application sector continued to show strong performance, with over ten constituent stocks hitting the daily limit. Notable stocks include Ingrity Media, Liou Co., and Shengguang Group, all of which reached the limit [1] - The AI medical sector remained active, with Meiyan Health and Dean Diagnostics achieving three consecutive limit-ups, while Hongbo Pharmaceutical hit a 20% limit-up [1] - The commercial aerospace sector showed localized strength, with Shaanxi Huada and Electronic Science and Technology Chip both reaching the limit [1] - Conversely, the controlled nuclear fusion sector saw a collective decline, with Zhongzhou Special Materials and Wangzi New Materials experiencing significant drops [1] Limit-Up Performance - The limit-up rate was recorded at 69.00%, with 72 stocks hitting the limit and 32 stocks touching the limit on the previous day [3] - The opening rate for limit-up stocks was 85%, with a profit rate of 2.96% [3]