A股午后全线爆发，保险、券商板块拉升，锂矿概念爆发

Market Overview - A-shares experienced a significant rally on December 17, with the Shanghai Composite Index rising over 1% and the ChiNext Index soaring over 3% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 1.8345 trillion yuan, an increase of approximately 86 billion yuan compared to the previous day [1] Insurance and Brokerage Sector - The insurance sector saw strong gains, led by China Pacific Insurance, with China Life and China Property & Casualty both rising over 3% [3] - Analysts suggest that the insurance industry may experience valuation recovery due to the adjustment of preset interest rates and the development of floating income products [3] - The brokerage sector also performed well, with Huatai Securities hitting a near-limit up and closing up about 6% [3] AI Industry Chain - Stocks in the AI industry chain surged, with Yidong Electronics and Liante Technology both hitting the 20% limit up [5] - The global AI industry is at a pivotal point of capability leap and accelerated commercialization, with significant demand for computing power expected to drive future growth [7] Lithium Mining Sector - The lithium mining sector saw substantial gains, with Tianhua New Energy rising over 14% and several other companies hitting their daily limit [9] - The price of lithium carbonate futures surged over 8%, reaching a new high since June 2024, driven by supply disruptions and rising demand expectations [11] - Analysts note that the price of lithium carbonate has increased over 70% from its low earlier in the year, indicating strong supply and demand dynamics [11]