午评：创业板指半日跌1.58%，银行、石油板块逆势走高

Core Points - The three major indices collectively declined, with the Shanghai Composite Index down 0.24%, the Shenzhen Component down 1.07%, and the ChiNext Index down 1.58% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 12,702 billion yuan, an increase of 22 billion yuan compared to the previous day [1] - Over 4,000 stocks in the market experienced declines [1] Sector Performance - The oil and gas extraction and services, insurance, brain-computer interface, banking, and influenza sectors saw the largest gains [1] - The photovoltaic equipment, cultivated diamonds, controllable nuclear fusion, phosphorus chemical industry, battery, military equipment, and photolithography concept stocks faced the largest declines [1] Notable Stock Movements - The phosphorus chemical and battery industry chains underwent a collective adjustment, with Chengxing Co. hitting the daily limit down, and several other stocks like Tianci Materials, Fengyuan Co., Xinzhou Bang, and Nandu Power also declining [1] - The cultivated diamond and superhard materials sectors experienced a pullback, with World Co. dropping over 10%, followed by Huifeng Diamonds, Sifangda, and Power Diamonds [1] - The photovoltaic equipment sector also performed poorly, with Hongyuan Green Energy hitting the daily limit down, and companies like Canadian Solar and Airo Energy dropping over 10% [1] - Conversely, the banking sector showed collective strength, with Agricultural Bank's total market value surpassing 3 trillion yuan, setting a new historical high [1] - Oil and gas stocks were active, with PetroChina and Sinopec both hitting the daily limit up, and China National Offshore Oil Corporation, China Petroleum, and China Petrochemical all rising [1]