午评：沪指半日涨0.64%收复3900点，海南自贸概念股集体爆发

Core Viewpoint - The market showed strong performance on December 22, with the Shanghai Composite Index recovering above the 3900-point mark and the ChiNext Index rising over 2% at one point [1] Market Performance - The total trading volume in the Shanghai and Shenzhen markets reached 1.19 trillion yuan, an increase of 97.7 billion yuan compared to the previous trading day [1] - Nearly 3500 stocks in the market experienced gains [1] Sector Highlights - The Hainan Free Trade Zone concept saw a collective surge, with nearly 20 stocks including Hainan Airlines and Hainan Ruize hitting the daily limit [1] - The commercial aerospace sector showed repeated strength, with stocks like Shenjian Co. and Beidou Xingtong reaching the daily limit [1] - The computing hardware sector was active, with the three major optical module companies collectively rising [1] - Semiconductor equipment stocks rallied, with companies like Tuojing Technology reaching historical highs [1] - In contrast, the AI medical sector experienced fluctuations, with Huaren Health suffering a significant decline [1] Sector Performance Summary - The top-performing sectors included Hainan Free Trade Zone, precious metals, and computing hardware [1] - The sectors with the largest declines included pharmaceutical commerce, film and television, and banking [1] - At the close, the Shanghai Composite Index rose by 0.64%, the Shenzhen Component Index increased by 1.36%, and the ChiNext Index gained 1.8% [1]