5月23日午间收评：三大指数小幅上涨，可控核聚变、AI医疗概念集体走强

Market Overview - The market experienced a morning rebound with strong performances from the Shenzhen Component Index and the ChiNext Index, driven by sectors such as controllable nuclear fusion and AI healthcare [1][1][1] - The overall trading volume for the morning session reached 661.2 billion [1] Sector Performance - Leading sectors included controllable nuclear fusion, AI healthcare, innovative pharmaceuticals, and automotive manufacturing, all showing significant gains [1][1] - Conversely, the shipping and port sector continued to decline, with Nanjing Port hitting the daily limit down [1][1] Stock Movement - A total of 3,157 stocks rose, with 44 hitting the daily limit up, while 1,708 stocks fell, with 3 hitting the daily limit down [1][1][1] - The market saw a board explosion rate of 31%, with 17 stocks experiencing this phenomenon [1]