Tongguang Cable (300265) Limit-Up Cause and Trend Analysis

Tongguang Cable (300265) hit the limit-up on December 11, 2025, mainly driven by strong market demand in the optical communication industry and sector linkage effects [0][1][2]. At the industry level, according to Dell’Oro Group’s report, the global optical transmission system market grew by 15% year-on-year in the third quarter of 2025, with demand from cloud service providers increasing by 58% and data center interconnection (DCI) business growing by 34% [1]. This high-growth trend has boosted the stock performance of the entire optical communication industry chain. In terms of sector linkage, global optical communication giant Ciena’s stock hit an all-time high before the release of its Q4 earnings report, reflecting the market’s optimistic sentiment towards the optical communication industry [2]. As an optical fiber cable enterprise in the optical communication industry chain, Tongguang Cable benefited from the overall rise of the industry.

1. Industry Trend Dominance:
   This limit-up lacked major news or announcements from Tongguang Cable itself and was mainly driven by industry trends, meaning the sustainability of the stock price performance needs to be observed cautiously [0].
2. Capital Inflow Characteristics:
   The limit-up trend indicates a large inflow of capital into the stock, possibly from industry investors or short-term traders, showing increased market attention to the optical communication sector [0].
3. Sector Linkage Effect:
   The stock price performance of global optical communication giants has a transmission effect on domestic related enterprises, reflecting the global linkage of the optical communication industry [2].

• Risks:
  • Lack of company-specific catalysts; subsequent market conditions may be affected by industry fluctuations [0].
  • The optical communication industry is highly competitive; price fluctuations may affect the company’s profitability [0].
  • Profit-taking may occur after the limit-up, leading to short-term stock price volatility [0].
• Opportunities:
  The high-growth trend of the optical communication industry continues; if the company can seize industry opportunities, its long-term development prospects are worth paying attention to [1].
• Priority:
  Short-term attention should be paid to volatility risks; long-term attention can be given to industry trends and the company’s performance [0].

Tongguang Cable’s this limit-up was driven by the high growth of the optical communication industry and sector linkage effects; market sentiment is optimistic, and capital inflow is obvious. However, due to the lack of company-specific catalysts, there is uncertainty in subsequent trends. Price levels to pay attention to: The important resistance level before the limit-up may turn into a support level, and the recent historical high will become the next important resistance level [0].

This report provides market background and risk identification and does not constitute investment advice.