午评：沪指半日微跌0.15%，石油天然气板块集体走强

Market Overview - The three major indices collectively adjusted in early trading, with the Shanghai Composite Index down 0.15%, the Shenzhen Component Index down 0.17%, and the ChiNext Index down 0.4% [1] - The North China 50 Index increased by 0.43% [1] - The half-day trading volume in the Shanghai and Shenzhen markets reached 1.7897 trillion yuan, an increase of 143.9 billion yuan compared to the previous day [1] - Over 3,200 stocks in the market experienced gains [1] Sector Performance - The natural gas, commercial aerospace, military equipment, photovoltaic equipment, steel, coal, cultivated diamonds, and chemical sectors showed significant gains [1] - The precious metals, photolithography machines, semiconductors, insurance, and battery sectors lagged behind [1] Notable Developments - U.S. natural gas futures prices surged over 50% in two days, leading to a collective surge in the oil and gas sector, with China National Offshore Oil Corporation (CNOOC) rising over 5% to reach a new high in over a year [1] - The storage chip sector exhibited divergence, with Puran Co. hitting a new high while companies like Blue Arrow Electronics saw declines [1] - The commercial aerospace sector rebounded, with companies like Jili Rigging achieving consecutive gains, and stocks such as Zhongchao Holdings and Tengda Technology hitting the daily limit [1] - Reports indicate that Elon Musk is actively advancing SpaceX's IPO plan [1] - The coal, photovoltaic, and state-owned enterprises also showed unusual movements [1] - Conversely, gold stocks followed the overnight decline in gold prices, with companies like Xiaocheng Technology and Western Gold falling over 5% [1] - The insurance sector also experienced a pullback, with China Ping An and China Pacific Insurance seeing slight declines [1]