刚刚，A股突变

Market Overview - On January 30, A-share market experienced significant fluctuations, with major indices initially dropping over 2% before showing mixed performance [2][4] - The industrial and precious metals sectors faced substantial declines, with the industrial metals index dropping 9% and the precious metals index down 8.7% [4][9] Sector Performance - Resource stocks were the main contributors to the market decline, with several stocks hitting the daily limit down, including Xiaocheng Technology and Chifeng Gold [4][9] - The光模块 (CPO) sector led the market gains, with notable increases in stocks such as Tianfu Communication, which rose by 11.92% [5][17] Individual Stock Movements - A total of 3,872 stocks declined, while only 1,494 stocks increased, with 27 stocks hitting the daily limit up [6] - Specific stocks in the precious metals sector, such as Xiaocheng Technology and Zhongjin Gold, recorded significant drops of 20% and 10% respectively [10][9] Trading Volume - The trading volume for the Shanghai and Shenzhen markets reached 1.93 trillion yuan, a decrease of 836 billion yuan compared to the previous trading day [6] Future Outlook - The光模块 market is projected to exceed $18 billion in revenue by 2025, driven by AI-related data center and transmission network construction [20]