Market Overview - The market experienced a V-shaped rebound in the afternoon, with the Sci-Tech 50 index surging by 7.23% [1][3] - Major indices closed higher, with the Shanghai Composite Index up 1.14%, Shenzhen Component Index up 2.25%, and the ChiNext Index leading with a 3.82% increase [1][3] Sector Performance - The top-performing sectors included Communication (up 7.14%), Electronics (up 5.53%), and Defense & Military (up 2.29%) [2] - Conversely, sectors such as Coal (-0.81%), Agriculture, Forestry, Animal Husbandry and Fishery (-0.73%), and Textiles and Apparel (-0.47%) lagged behind [2] Conceptual Indices - Conceptual indices that performed well included Copper Cable High-Speed Connection (up 5.61%), Co-packaged Optics (CPO) (up 5.13%), and F5G Concept (up 5.12%) [2] - Underperforming conceptual indices included Genetically Modified Organisms (-1.81%) and Alzheimer’s Concept (-1.07%) [2] Future Outlook - The report indicates that the market's upward momentum is driven by industrial policy support and ample liquidity, with expectations of a fiscal stimulus window in the 3rd to 4th quarter [5] - It is suggested to focus on technology growth and financial sectors for investment opportunities, while cyclical industries and new energy may see performance improvements in the latter half of the year [5]

Group 1 - The Co-Packaged Optics (CPO) concept has seen a rise of 5.13%, ranking second among concept sectors, with 93 stocks increasing in value [1][2] - Notable stocks that reached their daily limit include Tianfu Communication with a 20% increase, and others like Lingyi IOT, Dongshan Precision, and Changfei Optical Fiber also hitting the limit [1] - The top gainers in the CPO sector include Changxin Bochuang, Dekeli, and Dongtianwei, with increases of 18.84%, 15.60%, and 15.38% respectively [1] Group 2 - The CPO sector attracted a net inflow of 7.443 billion yuan, with 61 stocks receiving net inflows, and 18 stocks exceeding 100 million yuan in net inflows [2] - Industrial Fulian led the net inflow with 1.226 billion yuan, followed by Xinyi Sheng, Dongshan Precision, and Tianfu Communication with net inflows of 1.053 billion yuan, 867 million yuan, and 700 million yuan respectively [2] - The top stocks by net inflow ratio include Changfei Optical Fiber, Woge Optoelectronics, and Tongyu Communication, with ratios of 28.85%, 22.87%, and 18.22% respectively [3] Group 3 - The stocks with the largest declines include Hezhuo Intelligent, Maixinlin, and Hangjin Technology, with decreases of 5.24%, 2.34%, and 2.01% respectively [1][8] - The overall market sentiment shows a mixed performance across various sectors, with some sectors like copper cable high-speed connections and F5G also showing positive movements [2]

Market Performance - On August 28, 2025, the Shanghai Composite Index rose by 1.14%, the Shenzhen Component Index increased by 2.25%, and the ChiNext Index surged by 3.82%[3] - The total market turnover was 30,008.89 billion CNY, a decrease of 1,969.02 billion CNY from the previous trading day[3] - A total of 2,867 stocks rose while 2,402 stocks fell across the market[3] Sector and Style Analysis - The top-performing sectors included Communication (up 7.15%), Electronics (up 5.33%), and Comprehensive Finance (up 2.38%)[3] - The worst-performing sectors were Coal (down 1.05%), Agriculture, Forestry, Animal Husbandry, and Fishery (down 0.53%), and Comprehensive (down 0.42%)[3] - Growth stocks outperformed value stocks, with the ranking being Growth > Finance > Cyclical > Stable > 0 > Consumption[3] Capital Flow - On August 28, 2025, the net outflow of main funds was 443.43 billion CNY, with large orders seeing a net outflow of 283.76 billion CNY[4] - Small orders continued to see a net inflow of 622.35 billion CNY, indicating retail investor interest[4] ETF Activity - Major ETFs such as the Huaxia SSE 50 ETF and the Huatai-PB CSI 300 ETF saw changes in turnover, with the Huaxia SSE 50 ETF increasing by 4.62 billion CNY to 35.25 billion CNY[4] - The total turnover for the major ETFs was as follows: Huaxia SSE 50 ETF (35.25 billion CNY), Huatai-PB CSI 300 ETF (57.46 billion CNY), and others showing mixed results[4] Global Market Trends - On August 28, 2025, the Hang Seng Index fell by 0.81%, while the Nikkei 225 Index rose by 0.73%[5] - The US stock indices showed a general upward trend, with the Dow Jones Industrial Average increasing by 0.32%[6]

Core Viewpoint - The Co-Packaged Optics (CPO) sector has shown a slight increase of 0.18%, ranking third among concept sectors, with notable performances from several stocks, while some experienced declines [1][2]. Group 1: Sector Performance - The CPO concept saw 39 stocks rise, with Dongtian Micro achieving a 20% limit-up, followed by Cambridge Technology and Founder Technology, both hitting the limit-up as well [1]. - Other significant gainers included Shijia Photon, Changxin Bochuang, and Xinyi Sheng, which rose by 14.93%, 12.49%, and 9.32% respectively [1]. - Conversely, the biggest decliners were Weiteng Electric, Lian Te Technology, and Juguang Technology, which fell by 8.76%, 7.73%, and 6.29% respectively [1]. Group 2: Capital Flow - The CPO sector experienced a net outflow of 2.7 billion yuan, with 40 stocks receiving net inflows from major funds [2]. - Founder Technology led the net inflow with 1.219 billion yuan, followed by Industrial Fulian, Taicheng Light, and Yongding Shares, which saw net inflows of 550 million yuan, 362 million yuan, and 350 million yuan respectively [2]. - In terms of net inflow ratios, Cambridge Technology, Founder Technology, and Xuguang Electronics had the highest rates at 38.19%, 22.29%, and 16.79% respectively [3][4].

Group 1 - F5G concept stocks increased by 0.46%, leading the sector gains, with 14 stocks rising, including Dongtian Microelectronics and Cambridge Technology hitting the daily limit up [1][2] - Notable gainers included Shijia Photon and Changxin Bochuang, which rose by 14.93% and 12.49% respectively, while the biggest losers were Kereis, Huamai Technology, and Jinxin Nuo, which fell by 6.38%, 4.92%, and 4.72% respectively [1][2] Group 2 - In terms of capital flow, the F5G concept saw a net outflow of 0.46 billion yuan, with 16 stocks experiencing net inflows, and 8 stocks receiving over 50 million yuan in net inflows [2][3] - The top net inflow stock was Taicheng Light, with a net inflow of 3.62 billion yuan, followed by Dongtian Microelectronics and Cambridge Technology with net inflows of 1.70 billion yuan and 1.32 billion yuan respectively [2][3] Group 3 - The net inflow ratios for leading stocks were Cambridge Technology at 38.19%, Dongtian Microelectronics at 12.62%, and Taicheng Light at 7.31% [3] - The trading performance of F5G concept stocks showed significant turnover rates, with Dongtian Microelectronics at 26.23% and Taicheng Light at 20.63% [3][4]

Group 1 - The Terahertz concept sector increased by 3.01%, ranking 7th among concept sectors, with 13 stocks rising, including Changfei Optical Fiber which hit the daily limit, and Tianyin Electromechanical, Chuangyuan Xinke, and Hengtong Optic-Electric showing significant gains of 9.17%, 8.48%, and 7.96% respectively [1] - The Terahertz concept sector experienced a net outflow of 935 million yuan, with 10 stocks seeing net inflows, and 5 stocks receiving over 100 million yuan in net inflows, led by Hengtong Optic-Electric with a net inflow of 298 million yuan [2] - In terms of capital inflow ratios, Changfei Optical Fiber, Shenglu Communication, and Hengtong Optic-Electric had the highest net inflow rates at 36.14%, 10.11%, and 9.21% respectively [3] Group 2 - The top gainers in the Terahertz concept included Hengtong Optic-Electric with a 7.96% increase, and Tianyin Electromechanical with a 9.17% increase, while the top losers included Taihao Technology with a 3.04% decrease [4] - The overall performance of the Terahertz concept was part of a broader market trend, with various sectors experiencing mixed results, such as Rare Earth Permanent Magnets rising by 4.88% and the Horse Racing concept declining by 0.49% [2]

来源：新浪证券-红岸工作室 8月21日，联特科技跌2.67%，成交额7.57亿元，换手率10.39%，总市值138.75亿元。 异动分析 共封装光学(CPO)+5G+数据中心+人民币贬值受益+芯片概念 1、2022年12月8日互动易回复：公司拥有了光芯片集成、高速光器件以及高速光模块设计、生产的核心 能力，在高速信号设计和仿真、光学仿真和光耦合工艺领域掌握了相关核心技术。公司目前研发的有基 于EML（电吸收调制激光器）、SIP（硅光）、TFLN（薄膜铌酸锂）调制技术的800G光模块，以及用 于下一代产品NPO（近封装光学）/CPO（共封装光学）所需的高速光连接技术、激光器技术和芯片级 光电混合封装技术等。 2、光模块目前主要应用市场包括数通市场、电信市场和新兴市场。其中数通市场是光模块增速最快的 市场，目前已超越电信市场成为第一大市场，是光模块产业未来的主流增长点；电信市场是光模块最先 发力的市场， 5G 建设将大幅拉动电信用光模块需求。公司产品是数据中心和 5G 通信应用领域的上游 关键部件。 3、公司的光模块低功耗设计技术，通过独特的电路设计和算法优化，显著降低光模块产品功耗，在 5G 通信和数据中心应用 ...

截至8月19日收盘，共封装光学(CPO)概念上涨1.80%，位居概念板块涨幅第10，板块内，60股上涨，帝 奥微20%涨停，剑桥科技、领益智造等涨停，东田微、赛微电子、兆龙互连等涨幅居前，分别上涨 11.75%、11.69%、11.46%。跌幅居前的有致尚科技、东山精密、中富电路等，分别下跌5.17%、 3.75%、3.06%。 今日涨跌幅居前的概念板块 | 代码 | 简称 | 今日涨跌幅 | 今日换手率 | 主力资金流量（万 | 主力资金净流入比率 | | --- | --- | --- | --- | --- | --- | | | | （%） | （%） | 元） | （%） | | 300308 | 中际旭 创 | 5.96 | 3.71 | 52808.73 | 4.77 | | 300502 | 新易盛 | 5.12 | 5.10 | 49497.83 | 4.30 | | 600487 | 亨通光 电 | 3.55 | 5.88 | 29367.31 | 10.97 | | 000021 | 深科技 | 6.00 | 9.99 | 25084.23 | 7.79 | | 002897 | 意华股 ...

Group 1: Market Trends - A total of 34 stocks had a closing order amount exceeding 1 billion yuan, indicating strong market interest [2] - The top three stocks by closing order funds were Aili Home, Northern Rare Earth, and Huasheng Tiancai, with amounts of 7.43 billion yuan, 5.49 billion yuan, and 3.34 billion yuan respectively [2] - The stock Dazhong Pump Industry achieved a remarkable 6 consecutive daily limit increases, with a cumulative increase of 120.45% since July 31 [2] Group 2: Liquid Cooling Sector - The liquid cooling server sector saw significant activity, with stocks like Yongtai Technology, Yingweike, and Yinheng Co. experiencing price surges [3] - Yingweike provides liquid cooling solutions for servers and data centers, adapting to various computational needs [3] - Dazhong Pump Industry's liquid cooling pump products are core components in liquid cooling temperature control systems, entering the supply chains of major companies like Weidi Technology and ZTE [3] Group 3: Film and Television Industry - The film and television sector also saw stocks like Huazhi Shumei and Huace Film & TV reaching daily limits [4] - Huace Film & TV continues to lead in production volume, broadcast quantity, and awards in both domestic and international markets [4] - Ciweng Media focuses on investment, production, and distribution of films and television dramas, along with mobile game development [4] Group 4: Co-Packaged Optics (CPO) - The CPO sector had stocks like Dekeli and Qiangrui Technology experiencing price increases [5] - Dekeli is researching high-speed, compact long-distance optical transceiver modules, including 800G and CPO technologies [5] - Qiangrui Technology's subsidiary has developed liquid cooling solutions for optical module products, providing targeted solutions for major domestic clients [5] Group 5: Institutional Investment - 13 stocks on the Dragon and Tiger list had net purchases exceeding 1 billion yuan, with several stocks like Liou Co. and Hengbao Co. seeing net purchases over 2 billion yuan [6][7] - Institutional net purchases were led by stocks such as Dazhong and Tenglong, with amounts of 2.34 billion yuan and 2.27 billion yuan respectively [7]

Strong Stocks - As of August 18, the Shanghai Composite Index rose by 0.85% to 3728.03 points, the Shenzhen Component Index increased by 1.73% to 11835.57 points, and the ChiNext Index climbed by 2.84% to 2606.2 points [1] - A total of 118 stocks in the A-share market hit the daily limit, with the top three strong stocks being: Great Wall Military Industry (601606), Da Zhi Hui (601519), and Founder Technology (600601) [1] - Great Wall Military Industry had 13 trading days with 8 limit-ups, a turnover rate of 17.6%, and a transaction amount of 7.799 billion yuan [1] - Da Zhi Hui achieved 2 consecutive limit-ups, with a turnover rate of 7.45% and a transaction amount of 2.458 billion yuan [1] - Founder Technology also had 2 consecutive limit-ups, with a turnover rate of 9.93% and a transaction amount of 3.031 billion yuan [1] Strong Concept Sectors - The top three concept sectors with the highest increase in A-shares are: Liquid Cooling Servers, Sci-Tech New Stocks, and Huawei HiSilicon Concept Stocks [2] - The Liquid Cooling Servers sector saw a decline of 6.31%, with 96.55% of its constituent stocks rising [2] - The Sci-Tech New Stocks sector experienced a decline of 5.51%, with 93.33% of its constituent stocks increasing [2] - The Huawei HiSilicon Concept Stocks sector had a decline of 4.93%, with 94.0% of its constituent stocks rising [2] - Other notable sectors include F5G Concept and Short Drama Games, both with declines of 4.61% but high percentages of rising constituent stocks [2]