Quantitative Models and Construction Methods - **Model Name**: Real-time Public Fund Positioning **Model Construction Idea**: This model estimates the real-time positioning of public funds based on publicly available market information such as fund net value, disclosed holdings, and research activities[3][20] **Model Construction Process**: The process involves complex data processing of public market information, including fund net value, disclosed holdings, and research activities. Detailed methodology is referenced in the report "偏股混合型基金指数（885001.WI）：优势、复制与超越"[20] - **Model Name**: ETF Fund Positioning **Model Construction Idea**: This model tracks the dynamics of ETF fund holdings as a key indicator of market fund flows, reflecting the growing importance of index investment in the A-share market[3][21] **Model Construction Process**: The model calculates the proportion of ETF holdings relative to the market capitalization of PCB sector stocks. As of Q2 2025, the total scale of public ETF funds exceeded 4.3 trillion yuan, with ETF holdings in the PCB sector at a historical high, accounting for 2.6% of the sector's market capitalization[21][23] - **Model Name**: Financing Balance Dynamics **Model Construction Idea**: This model uses financing balance as a proxy for investor sentiment, where an increase in financing balance indicates a bullish outlook on the market[3][25] **Model Construction Process**: The model tracks the total amount of outstanding financing in margin trading. The PCB sector's financing balance is at a historical high, while the short-selling balance remains at a low level[25][27] - **Model Name**: Chip Yield Characteristics **Model Construction Idea**: This model evaluates the profitability of the PCB sector based on chip yield, which measures the return of current prices relative to historical chip costs. It identifies momentum effects in strong markets and reversal effects in weak markets[3][26] **Model Construction Process**: The model estimates the average holding cost of funds at different price levels and calculates chip yield as the return of current prices relative to historical chip costs. The PCB sector's current profitability is 22.95%[26][28] Model Backtesting Results - **Real-time Public Fund Positioning**: No specific quantitative backtesting results provided - **ETF Fund Positioning**: ETF holdings account for 2.6% of the PCB sector's market capitalization[23] - **Financing Balance Dynamics**: Financing balance is at a historical high, while short-selling balance is at a low level[25][27] - **Chip Yield Characteristics**: Current profitability of the PCB sector is 22.95%[26][28] Quantitative Factors and Construction Methods - **Factor Name**: Chip Yield **Factor Construction Idea**: This factor measures the profitability of the PCB sector based on the return of current prices relative to historical chip costs[3][26] **Factor Construction Process**: The factor is calculated as the return of current prices relative to historical chip costs. It reflects momentum effects in strong markets and reversal effects in weak markets. The PCB sector's current chip yield is 22.95%[26][28] Factor Backtesting Results - **Chip Yield**: Current profitability of the PCB sector is 22.95%[26][28]

Group 1 - A total of 41 stocks appeared on the weekly trading list, with 25 showing net purchases from the Shenzhen Stock Connect [1] - The top three stocks with the highest net purchases were Shenghong Technology (65.95 million), Guangxun Technology (39.91 million), and Shenzhen South Circuit (24.06 million) [1] - The average increase for stocks with net purchases was 15.01%, outperforming the Shanghai Composite Index, which fell by 0.94% [1] Group 2 - The stocks with the highest net sales included Pengding Holdings (29.77 million) and Weichai Heavy Industry (13.68 million) [2] - The stock with the largest increase was Guangsheng Hall, which rose by 36.42% during the week [1] - The trading volume for stocks with net purchases varied significantly, with some stocks like Shubeide showing a turnover rate of 166.64% [1]

内容概况：中国是全球光电耦合器件的重要市场之一。近年来，随着通信、电力、工业控制等行业的快 速发展，光电耦合器件的市场需求不断增加。同时，技术的不断进步和应用领域的拓展也为光电耦合器 件市场的发展提供了有力支持，光电耦合器件市场规模呈现出稳健的增长态势。数据显示，中国光电耦 合器件行业规模从2019年的19.74亿元增长至2024年的45.19亿元，年复合增长率为18.02%。未来，随着 智能化、数字化、绿色环保技术的发展，光电耦合器件在多个行业的应用需求持续增长。尤其是在工业 自动化、新能源汽车、5G通信、医疗设备等领域，光电耦合器件的应用将进一步扩大。 相关上市企业：华联电子（872122）、沪电股份（002463）、深南电路（002916）、生益科技 （600183）、兆易创新（603986）、光迅科技（002281）、华工科技（000988）、立讯精密 （002475）、烽火通信（600498）、中国通信服务（00552）等。 相关企业：深圳市奥伦德科技有限公司、湖北匡通电子股份有限公司、深圳市卓睿研发有限公司、北京 瑞普北光电子有限公司、深圳市优嘉骏电子有限公司、陕西航晶微电子有限公司等。 关键词： ...

Group 1: Foreign Trade Performance - Wuxi's foreign trade achieved a robust growth of 7.1% from January to June, surpassing the provincial average by 1.9 percentage points, with a total import and export value reaching 388.6 billion yuan, marking a historical high for the same period [1] - The city has recorded the highest historical import and export scale for four consecutive months, showcasing its resilience in the face of a complex international trade environment [1] Group 2: Industry Innovation and Upgrades - Wuxi's ShenNan Circuit Co., Ltd. has maintained a leading position in the electronic industry through significant R&D investment, with a projected revenue growth rate exceeding 30% in 2024 [2] - From January to June, Wuxi's electromechanical product exports reached 195.32 billion yuan, a year-on-year increase of 18.6%, accounting for 72.7% of the city's total exports [2] - High-tech products such as integrated circuits, lithium batteries, and printed circuit boards saw export growth rates of 38.7%, 41.4%, and 28.5% respectively, driving foreign trade growth [2] Group 3: Market Expansion and New Products - Wuxi's manufacturing enterprises are increasingly innovating to meet market demands, with high-tech product exports growing by 22.2% in the first half of the year, representing 40.8% of total foreign trade exports [3] - Companies like Zhongke Weizhi Technology Co., Ltd. have successfully broken into international markets, with a 15% year-on-year increase in export value from January to May [4] Group 4: Global Partnerships and Trade Growth - Wuxi's foreign trade enterprises are actively expanding into emerging markets, with exports to South Korea and ASEAN growing by 22.5% and 13.2% respectively [4] - The total import and export value with countries involved in the Belt and Road Initiative reached 203.77 billion yuan, a growth of 9.9%, accounting for 52.4% of the city's total [4] Group 5: Support for Exporting Enterprises - Wuxi is implementing a comprehensive support system for foreign trade enterprises, including subsidies for exhibition fees and organizing overseas trade fairs for over 1,000 companies [8] - The city has introduced a special action plan for cross-border trade facilitation, with 20 key measures aimed at reducing transaction costs and enhancing trade efficiency [8]

证券代码：002916 证券简称：深南电路 公告编号：2025-023 深南电路股份有限公司 关于召开 2025 年第一次临时股东会的通知 本公司及董事会全体成员保证信息披露的内容真实、准确、完整，没有虚假 记载、误导性陈述或重大遗漏。 深南电路股份有限公司（以下简称"公司"）2025 年 7 月 30 日召开第四届董 事会第七次会议，审议通过了《关于提请召开 2025 年第一次临时股东会的议案》， 现将本次股东会的有关事项通知如下： 一、召开会议的基本情况 部门规章、规范性文件和《公司章程》的规定。 （1）现场会议时间：2025 年 8 月 18 日（星期一）15:00 （2）网络投票时间：2025 年 8 月 18 日。其中，通过深圳证券交易所交易系统 进行投票的时间为 2025 年 8 月 18 日 9:15-9:25、9:30-11:30、13:00-15:00；通过深圳 证券交易所互联网投票系统进行投票的时间为 2025 年 8 月 18 日 9:15-15:00 的任意 时间。 （1）在股权登记日持有公司股份的普通股股东或其代理人；截至股权登记日 深圳分公司登记在册的公司全体股东均有权出席股东会， ...

证券代码：002916 证券简称：深南电路 公告编号：2025-021 深南电路股份有限公司 本公司及董事会全体成员保证信息披露的内容真实、准确、完整，没有虚假 记载、误导性陈述或重大遗漏。 一、董事会会议召开情况 深南电路股份有限公司（以下简称"公司"）第四届董事会第七次会议于 2025 年 7 月 30 日在公司会议室以现场结合通讯方式召开。通知于 2025 年 7 月 25 日 以电子邮件等方式向全体董事发出，本次会议应参加表决董事 9 人，实际表决董 事 9 人。本次董事会会议的召开符合有关法律法规和《公司章程》的规定。 二、董事会会议审议情况 本次会议审议通过了以下议案： （一）《关于修订 <公司章程> 的议案》 根据《中华人民共和国公司法》 《中华人民共和国证券法》 《上市公司治理准 则》 具体内容详见披露于巨潮资讯网（http://www.cninfo.com.cn）的《公司章程 修订对照表》及《公司章程》全文。 与会董事以同意 9 票，反对 0 票，弃权 0 票的结果通过。本议案尚需提交股 东会审议。 （二）《关于修订 <股东会议事规则> 的议案》 具体内容详见披露于巨潮资讯网（http:// ...

Core Viewpoint - The company has announced the continued appointment of Yongcheng Accounting Firm as the auditor for its 2025 financial statements and internal control audit [2] Group 1 - The company is maintaining its relationship with Yongcheng Accounting Firm for auditing purposes [2] - The appointment is specifically for the 2025 fiscal year [2] - This decision reflects the company's commitment to ensuring proper financial oversight and control [2]

证券日报网讯 7月30日晚间，深南电路发布公告称，公司第四届董事会第七次会议审议通过了《关于修 订的议案》等多项议案。 （文章来源：证券日报） ...

证券日报网讯 7月30日晚间，深南电路发布公告称，公司将于2025年8月18日召开2025年第一次临时股 东会。本次股东会将审议《关于修订的议案》等多项议案。 （文章来源：证券日报） ...

2024年1至12月份，深南电路的营业收入构成为：电子电路占比95.16%，其他业务占比4.84%。 （文章来源：每日经济新闻） 深南电路（SZ 002916，收盘价：140.98元）7月30日晚间发布公告称，公司第四届第七次董事会会议于 2025年7月30日在公司会议室以现场结合通讯方式召开。会议审议了《关于修订的议案》等文件。 ...