午评：创业板指半日跌0.83%，航天系、电子化学品、半导体等概念走弱

Market Performance - The three major indices experienced a pullback after reaching highs, with the Shanghai Composite Index down 0.03%, the Shenzhen Component Index down 0.31%, and the ChiNext Index down 0.83% [1] - The North Stock 50 Index decreased by 0.27% [1] - The total trading volume in the Shanghai and Shenzhen markets was approximately 24,351.81 billion yuan, an increase of about 1,283.01 billion yuan compared to the previous trading day [1] Stock Movement - A total of 2,430 stocks rose while 2,865 stocks fell across the market [1]