Analysis of 600257 Dahuhu Co., Ltd.'s Strong Limit-Up: Driving Factors and Sustainability Outlook

On November 19, 2025, Dahuhu Co., Ltd. (600257) surged to a strong limit-up, with a turnover of 608 million yuan and a turnover rate of 19.13%[2], becoming one of the leading stocks in the aquaculture sector. Its rise was mainly driven by the following factors:

1. Collective Sector Boom
   : The aquaculture sector saw multiple stocks hit limit-up that day, including Zhangzidao (002069) and Guolian Aquatic Products, etc. [1,4,5,6], and the sector’s popularity spread to Dahuhu Co., Ltd.
2. Fundamental Improvement
   : The company’s net profit attributable to shareholders in the first three quarters decreased by 97.36% year-on-year, and its operating conditions improved significantly [2]; the controlling shareholder accumulated an increase of 150 million yuan, with a shareholding ratio of 6.35%, demonstrating confidence in the company’s future [2].
3. Strategic Transformation Advancement
   : The company has been renamed “Dahu Health Industry Co., Ltd.”, expanding from traditional aquatic product business to the big health industry [0,2], opening up new valuation space.
4. Import Substitution Expectation
   : Rumors of restrictions on Japanese aquatic product imports continued to ferment, and local aquatic enterprises benefited from the increased demand for import substitution [3].
   In addition, according to the Dragon and Tiger List data, Founder Securities Hangzhou Baishixiang Business Department net bought 18.7163 million yuan [7], reflecting active participation of institutional funds.

• Dual-Drive Effect
  : The performance improvement of the aquatic main business and the strategic layout of big health transformation form dual catalysts, attracting attention from different types of investors.
• Combination of Short-Term and Long-Term Logic
  : The import substitution rumor is a short-term trigger, while the performance improvement and transformation progress form long-term support [3].
• High Capital Activity
  : The high turnover rate (19.13%) indicates active market transactions, but also reflects short-term volatility risks [2].

• Risk Points
  :
  • Short-term Volatility Risk: High turnover rate means the stock price may face large fluctuations in the short term [2];
  • Sector Rotation Risk: If market hotspots switch, the popularity of the aquaculture sector may fade;
  • Transformation Execution Risk: The expansion of big health business takes time to verify, with uncertainties.
• Opportunity Window
  :
  • If the aquaculture sector’s popularity continues, the company is expected to benefit further;
  • Smooth transformation progress may bring valuation revaluation opportunities.

Dahuhu Co., Ltd. (600257)'s limit-up on November 19 was the result of the combined effect of sector popularity, fundamental improvement, strategic transformation, and import substitution expectation. Although short-term transactions are active, investors need to pay attention to the sustainability of the sector and the company’s transformation progress.