001896，7连板

Market Overview - On February 27, major A-share indices collectively declined in the morning session, with the Shanghai Composite Index down 0.17%, Shenzhen Component Index down 0.68%, and ChiNext Index down 1.46% [1][9] - The total trading volume in the Shanghai and Shenzhen markets was 15,966 billion CNY, a decrease of 532 billion CNY compared to the previous day [1][9] - Over 2,300 stocks in the market experienced gains [1][9] Company Highlights - YN Holdings (豫能控股) saw its stock price surge, hitting the daily limit after opening, and achieved a total of seven consecutive trading days of limit-up, with the price rising from 6.85 CNY to 13.34 CNY, nearly doubling in value [2][10] - The company announced plans to acquire a controlling stake in Zhengzhou Heying Data Co., which specializes in large-scale data center operations, with an IT capacity exceeding 1GW [12][4] - The investment amount for this acquisition is expected to be no more than 1.4 billion CNY, with a stake of up to 49% [4][12] Industry Trends - The tungsten sector experienced a significant rally, with companies like Zhangyuan Tungsten (章源钨业) achieving five limit-up days in seven trading sessions [5][14] - Tungsten prices have been rising, with black tungsten concentrate and white tungsten concentrate prices increasing by 6,000 CNY per ton, and ammonium paratungstate (APT) increasing by 10,000 CNY per ton compared to the previous month [7][16] - As of February 26, tungsten powder prices reached 1,850 CNY per kilogram, up 71.3% since the beginning of the year, while the price of 65% black tungsten concentrate rose by 65.2% [7][16]