A股放量反弹，沪指收复3400点关口

Market Overview - A-shares experienced a significant increase, with major indices rising strongly, as the Shanghai Composite Index surpassed 3400 points, gaining over 1%, and the ChiNext Index rising over 2% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 14,484 billion yuan, an increase of over 3,000 billion yuan compared to the previous day [1] Brokerage and Insurance Sector - The brokerage sector, known as the "bull market flag bearer," saw a strong rally, with the overall sector rising by 2.93%, and only one of the 49 constituent stocks declining [2] - Notable individual stock performances included Xiangcai Securities and Guosheng Jin控, which hit the daily limit, while Dongfang Caifu rose over 4% [2] - The insurance sector also performed well, with an overall increase of 3.1%, led by China Life and Ping An, both rising over 3% [2][3] Robotics Sector - The humanoid robot concept sector saw a significant rise, with an overall increase of 4.3%, as 240 out of 245 stocks in the sector rose [4] - Key individual stock performances included Liyuanheng and Zhaofeng Co., which hit the daily limit, while Jiangsu Leili rose over 17% [4] Tesla's Humanoid Robot Development - Tesla is reportedly making rapid advancements in humanoid robot development, with plans for mass production of the third-generation Optimus robot expected to reach 100,000 units by 2026 [5] - The rapid development in this field presents significant opportunities for related supply chain companies, including those producing high-precision reducers and performance motors [5] Solid-State Battery Sector - The solid-state battery sector also saw strong performance, with an overall increase of 4.45%, as 204 out of 210 constituent stocks rose [7] - Recent industry events and announcements regarding mass production plans have accelerated the development of solid-state batteries, with significant advancements expected by 2025-2026 [8]