A股午评：沪指跌0.38%，超2900股上涨，培育钻石、光伏设备板块爆发

Core Viewpoint - The A-share market experienced a decline in major indices during the morning session, with the Shanghai Composite Index falling by 0.38% to 4003.17 points, indicating a bearish trend in the market [1] Market Performance - The three major indices, including the Shanghai Composite, Shenzhen Component, and ChiNext, all closed lower, with declines of 0.38%, 0.52%, and 0.74% respectively [1] - The North China 50 index also saw a decrease of 0.19% [1] - Total trading volume in the Shanghai and Shenzhen markets reached 12,680 billion yuan, a decrease of 1,864 billion yuan compared to the previous day [1] - Over 2,900 stocks in the market recorded gains, suggesting some underlying strength despite the overall index declines [1] Sector Performance - The cultivated diamond, photovoltaic equipment, and battery sectors showed strong performance, indicating potential growth areas within the market [1] - Conversely, the coal mining and processing, insurance, and components sectors experienced the largest declines, highlighting areas of weakness [1]