权重股，集体异动！

Group 1 - A-shares experienced a collective decline in major indices, with the Shanghai Composite Index dropping nearly 1% at one point, but the losses narrowed towards the end of the trading session [2] - Notable stocks such as Pudong Development Bank, Agricultural Bank of China, Industrial and Commercial Bank of China, Bank of China, China Petroleum, China Petrochemical, Kweichow Moutai, and China Life Insurance saw a sudden collective surge during the auction period [2] Group 2 - The North Securities 50 Index surged significantly in the afternoon, rising over 6% at one point and closing up 3.84% [3] - Individual stocks like Tianli Composite hit a 30% limit up, while Fujida and Xingtum Measurement Control rose over 13%, and Tianma New Materials increased by over 9% [4] - The North Securities Index sample stocks and reserve list will undergo regular adjustments, effective December 15, including companies like Five New Tunnel Equipment, Better Ray, Airo Technology, Shuguang Digital Innovation, Anda Technology, and Jinbo Biological [4] Group 3 - The ultra-high voltage concept stocks showed strong performance, with Tongguang Cable hitting a 20% limit up, while Zhongchao Holdings and Hualing Cable also reached their limit up, and Caneng Electric rose nearly 8% [5] - Institutions believe that 2026, as the start of the "14th Five-Year Plan," will present dual opportunities for the power equipment industry due to domestic demand expectations and external demand recovery [5] - CITIC Securities projects that investment in the power grid will maintain stable growth during the "14th Five-Year Plan," with an estimated total investment of approximately 3.8 trillion yuan from 2026 to 2030, corresponding to an average annual investment of about 750 billion yuan [5]