午评：科创50指数半日跌超1%，AI应用端、资源股持续活跃

Market Overview - The three major indices turned negative during the session, with the Shanghai Composite Index experiencing narrow fluctuations, the ChiNext Index rising and then falling, and the Sci-Tech 50 Index dropping over 1% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 2.02 trillion yuan, an increase of 103.9 billion yuan compared to the previous trading day [1] - Over 2,800 stocks in the market declined, indicating a broad market downturn [1] Sector Performance - Precious metals sector showed repeated activity, with Western Gold achieving four consecutive daily limits, China Gold with five consecutive limits, and Hunan Gold with four consecutive limits [1] - Oil and gas stocks continued to perform strongly, with Tongyuan Petroleum rising over 10% [1] - AI application concepts were active, with Zhejiang Wenlian achieving four limits in eight days, and companies like Yinsai Group and Yue Media hitting the daily limit [1] - The banking sector saw sustained growth, with Qingdao Bank hitting the daily limit [1] - The real estate sector experienced a rebound, with stocks like Dayue City, Sanxiang Impression, and I Love My Home hitting the daily limit [1] - The semiconductor industry chain showed weak performance, with Beijing Junzheng and Shenkong shares dropping over 6% [1] Trading Metrics - The limit-up performance rate was 63.00%, with 47 stocks hitting the limit and 28 stocks touching the limit [4] - The limit-up performance from the previous day was 3.76%, with a high opening rate of 75% [4]