中小盘北交所行业普通报告：本周北证50下跌，鼎佳精密上市，长江能科上会通过，酉立智能申购

Investment Rating - The report maintains a positive outlook on the industry, suggesting a focus on high-quality stocks with stable growth and reasonable valuations in the medium to long term [7][8]. Core Insights - The North Exchange 50 Index experienced a decline of 2.70% during the week of July 28 to August 1, 2025, closing at 1419.61 points, while the average market capitalization of the 269 A-share constituent stocks was 3.113 billion [7][13]. - The report highlights the performance of various sectors, with the top five performing industries being electronics (5.49%), pharmaceuticals (4.32%), textiles and apparel (1.26%), light industry manufacturing (0.39%), and food and beverage (-0.96%) [23][21]. - The report emphasizes the importance of focusing on undervalued stocks and thematic investments, recommending companies such as Tongli Co., Ltd. and Wuxin Tunnel Equipment for their growth potential [7][8]. Summary by Sections North Exchange Market Overview - As of August 1, 2025, the North Exchange A-share market consists of 269 stocks with an average market value of 3.113 billion. The North Exchange 50 Index saw a decrease of 2.70% during the specified week [7][13]. - The report notes a significant drop in the proportion of rising stocks, with only 19.33% of stocks increasing in value, a decrease of 51.56 percentage points week-on-week [21][23]. New Stock Updates - The report details the recent listing of Dingjia Precision on July 31, 2025, which specializes in the design, research, production, and sales of functional and protective products for consumer electronics [32]. - The company has established long-term relationships with major clients, including Compal Electronics and Delta Electronics, and its functional products accounted for 72.04% of total revenue in 2022 [32][33]. Key Companies and Earnings Forecast - The report provides earnings forecasts for key companies, including: - Tongli Co., Ltd. (Stock Code: 834599.BJ) with an estimated EPS of 1.99 for 2025 and a PE ratio of 11.40, rated as "Buy" [8]. - Wuxin Tunnel Equipment (Stock Code: 835174.BJ) with an estimated EPS of 1.64 for 2025 and a PE ratio of 40.05, also rated as "Buy" [8]. - Kaide Quartz (Stock Code: 835179.BJ) with an estimated EPS of 1.03 for 2025 and a PE ratio of 33.59, rated as "Hold" [8].