放量爆发，沪指创2015年以来新高，牛抬头？

Market Performance - The Shanghai Composite Index rose by 0.85%, the Shenzhen Component Index increased by 1.73%, and the ChiNext Index surged by 2.84% at the close [1][3] - Over 4,000 stocks in the two markets experienced gains, with a total trading volume of 2.76 trillion yuan [1] Sector Highlights - The liquid cooling concept stocks saw a strong surge, with an increase of 7.05% by midday, including over 20 stocks hitting the daily limit or rising more than 10% [3] - Major financial stocks, including brokerage and fintech companies, reached new historical highs, with stocks like Zhina Compass and Tonghuashun performing particularly well [3] - The rare earth permanent magnet sector was active, with stocks like Northern Rare Earth hitting the daily limit [3] - The coal industry opened high but closed down by 0.53%, with several stocks, including Electric Power Investment Energy and Jinko Coal Industry, falling over 2% [3] - Other sectors such as non-ferrous metals, gold, fertilizers, and steel experienced notable declines [3] Trading Dynamics - The market showed strong performance in the morning, with the Shanghai Composite Index reaching a new high since 2015, but cautious sentiment led to a pullback in the afternoon [3] - Despite the afternoon retreat, trading volume significantly increased, surpassing 5.196 trillion yuan compared to the previous trading day [3]