A股午评：沪指重回4000点上方，创业板指涨1.35%，证券、有色金属板块领涨

Core Viewpoint - The A-share market experienced a collective rise in the morning session, indicating positive investor sentiment and market activity [1] Market Performance - The Shanghai Composite Index rose by 0.37% to close at 4002.83 points [1] - The Shenzhen Component Index increased by 0.9% [1] - The ChiNext Index saw a rise of 1.35% [1] - The North China 50 Index gained 0.29% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 143.42 billion yuan, an increase of 74.7 billion yuan compared to the previous day [1] - Over 2000 stocks in the market experienced an increase [1] Sector Performance - The leading sectors included Hainan, securities, and non-ferrous metals [1] - Conversely, the banking, liquor, and film and television sectors showed declines [1]