近500亿市值券商，被证监会立案

Group 1 - The core point of the article is that Tianfeng Securities (601162.SH) has received a notice from the China Securities Regulatory Commission (CSRC) regarding an investigation for suspected violations of information disclosure and illegal financing, while the company's operations remain normal and it will cooperate with the investigation [1] Group 2 - As of the latest closing, Tianfeng Securities' stock price is 4.83 CNY per share, with a total market capitalization of 48.7 billion CNY [2] - The stock has shown a slight increase of 0.42% today, with a trading volume of 984,000 hands and a turnover of 474 million CNY [3]