Core Viewpoint - The stock of Upwind New Materials (SH688585) experienced a significant drop, closing at a 20% limit down due to regulatory actions and poor financial forecasts, marking a stark contrast to its previous rapid price increase [1][2]. Group 1: Stock Performance - On August 6, Upwind New Materials opened at 92.00 yuan, down 16.73% from the previous close, and closed at 88.38 yuan, recording a 20.00% limit down with a total trading volume of 23.48 billion yuan and a turnover rate of 6.35% [2]. - The stock had previously surged by 1320.05% from July 9 to August 5, becoming one of the fastest stocks to reach "10 times" and "15 times" its initial value in A-share history [2]. Group 2: Regulatory Actions - The Shanghai Stock Exchange took rare measures to suspend trading permissions for certain accounts due to abnormal trading behaviors related to Upwind New Materials [2]. - The company announced that its latest price-to-earnings ratio was 502.51, significantly higher than the industry average of 24.91 [2]. Group 3: Financial Forecast - For the first half of 2025, Upwind New Materials expects revenue of 784 million yuan, a year-on-year increase of 12.50%, while net profit is projected to decline by 32.91% to approximately 29.90 million yuan [3]. - The company indicated that if the stock price continues to rise, it may apply for another trading suspension for review [3]. Group 4: Market Dynamics - On August 6, the top five buying brokerage firms included Guotai Junan Securities and Donghai Securities, while the top five selling firms included Guosheng Securities and CITIC Securities [4]. - Upwind New Materials appeared on the trading leaderboard 29 times in the past month, with significant buying activity from various brokerage firms [5].