A股午评：沪指跌0.51%，创业板指跌3.4%，半导体、电池、黄金板块集体回调

Market Overview - The three major A-share indices collectively declined in the morning session, with the Shanghai Composite Index down 0.51% at 3913.8 points, the Shenzhen Component Index down 1.85%, and the ChiNext Index down 3.4% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 165.61 billion yuan, a decrease of 70.8 billion yuan compared to the previous day, with over 2300 stocks declining across the market [1] Sector Performance - The semiconductor sector experienced significant losses, with stocks such as Dongxin Technology, Yandong Micro, Jinghe Integrated, and Huahong Semiconductor all dropping over 10%, and many stocks seeing their margin financing ratios fall to 0 [1] - The precious metals sector saw a retreat, with spot gold falling below 4000 USD per ounce, leading to declines in gold and non-ferrous metal stocks, including Xibu Gold and Xiaocheng Technology, which fell over 8%, and Chifeng Gold, which dropped over 6% [1] - The battery sector also faced declines, with stocks like Liyuanheng and Tianhong Lithium Battery falling over 10%, and Yiwei Lithium Energy down over 9% [1] Gaining Sectors - Conversely, the gas sector saw collective gains, with stocks such as Dazhong Public Utilities and Hongtong Gas hitting the daily limit [1] - The electric grid equipment sector strengthened, with stocks like Sifang Co., Guodian Nanzi, and Shenneng Electric also reaching the daily limit [1] - The military industry stocks rose against the trend, with companies like Jieqiang Equipment and Beifang Changlong increasing over 16%, and Changcheng Military Industry hitting the daily limit [1]