午评：沪指跌0.23% 油气开采及服务板块涨幅居前

Market Overview - The A-share market experienced a collective decline in the morning session, with the Shanghai Composite Index closing at 3993.35 points, down 0.23% [1] - The Shenzhen Component Index closed at 13146.42 points, down 1.07% [1] - The ChiNext Index closed at 3084.70 points, down 1.58% [1] Sector Performance Gaining Sectors - The oil and gas extraction and services sector led the gains with an increase of 2.88%, with a total trading volume of 1205.83 million hands and a total transaction value of 69.68 billion [2] - The pharmaceutical commercial sector rose by 2.52%, with a total transaction value of 75.63 billion [2] - The insurance sector increased by 2.45%, with a total transaction value of 88.00 billion [2] Declining Sectors - The photovoltaic equipment sector saw the largest decline at -4.43%, with a total transaction value of 666.00 billion [2] - The energy metals sector decreased by 2.88%, with a total transaction value of 125.21 billion [2] - Other power equipment fell by 2.71%, with a total transaction value of 127.67 billion [2]