A股午评：创业板指涨0.44%，贵金属、半导体板块领涨，生物疫苗板块回调

Market Performance - The three major A-share indices showed mixed results, with the Shanghai Composite Index up 0.03% at 4134.03 points, the Shenzhen Component down 0.37%, and the ChiNext Index up 0.44% [1] - The North China 50 Index fell by 1.26% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 1.89 trillion yuan, a decrease of 372.6 billion yuan compared to the previous day [1] - Over 3,700 stocks in the market experienced declines [1] Sector Performance - Spot gold prices surged past the 5,100 USD mark, leading to renewed activity in gold stocks, with companies like Hunan Gold and Zijin Mining reaching historical highs [1] - The insurance, semiconductor, CPO, and cultivated diamond sectors showed strength [1] - Conversely, the biopharmaceutical, aquaculture, and battery sectors experienced significant declines [1]