Hangzhou Advance Gearbox stock alerted for trading volatility

Hangzhou Advance Gearbox Group (SSE: 601177) has announced that its stock triggered an abnormal trading fluctuation alert after closing prices rose over 20% cumulatively within two trading days, February 14 and 17, 2025, according to Shanghai Stock Exchange rules. The company confirmed, following self-assessment and verification with its controlling shareholders, that there are no undisclosed material events pending. The primary business remains the design, manufacture, and sale of gear transmission devices and powder metallurgy products, with no significant changes. A "high-integration, high-power-density joint component technology" project is in the early research phase, with uncertain outcomes and no sales generated yet. The company reminds investors to exercise caution and be aware of investment risks, as stock prices have fluctuated significantly, showing a cumulative increase of 46.39% since February 12, 2025.