A股午评：创业板半日涨0.44%，贵金属股延续强势，CPO及半导体股活跃，全市场超4400只个股下跌

Market Overview - The A-share market experienced a slight rebound after hitting a low, with the Shanghai Composite Index up 0.03% at 4134.03 points, while the Shenzhen Component Index fell 0.37% to 14262.99 points, and the ChiNext Index rose 0.44% to 3333.92 points [1] - The total trading volume in the Shanghai and Shenzhen markets reached 1.87 trillion yuan, with over 4400 stocks declining [1] Key Sectors - The precious metals sector continued its strong performance, with China Gold achieving three consecutive trading limits and Hunan Gold achieving two consecutive trading limits [1][2] - Semiconductor equipment stocks showed a rebound, with Chipone Technology rising nearly 14% and several stocks hitting the daily limit [1] - The CPO concept was active, with Yuanjie Technology rising over 10% to reach a historical high, and Huile Ecology hitting the daily limit [1] - The superhard materials sector strengthened, with Huanghe Whirlwind hitting the daily limit [1] Institutional Insights - Zhongtai Securities predicts that the market will continue to exhibit a differentiated pattern in the short term, with a gradual convergence expected in the medium term. The focus will shift from risk preference and valuation expansion to performance realization and profit growth as companies begin to disclose their annual and quarterly reports [4] - Guojin Securities emphasizes the ongoing re-evaluation of physical assets in asset allocation, highlighting the global consumption of physical commodities such as copper, aluminum, tin, gold, lithium, crude oil, and oil transportation [5] - Dongfang Securities notes that the recent market cooling has altered the market's rhythm but has not changed the overall market structure, suggesting that "technology sectors + resource products" will be the main investment routes before the Spring Festival [6] Emerging Concepts - The cultivated diamond and superhard materials sectors saw significant activity, with Huanghe Whirlwind hitting the daily limit and several other companies following suit. This surge is attributed to a recent collaboration between Xi'an University of Electronic Science and Technology and the Chinese Academy of Sciences, which developed a high-performance single crystal diamond radiation detector [3]