Recently, individual stocks in A-share market have been collapsing frequently. On the last trading day of last week, focus media, a leading media company with a market value of 100 billion yuan, collapsed and fell to its limit, triggering market discussion. As of the close, the share price closed at 9.43 yuan, with a market value of 15.4 billion yuan. On that day, the media sector also weakened as a whole. In addition to focus media, Meisheng culture, aofei entertainment and huanrui century all oversold. < / P > < p > for the big drop of focus media, the market speculation is constant. On the news side, the company has no obvious bad news in the near future, and the market speculation mainly focuses on the impact of relevant policies, profit taking flight, the impact of tight funds and so on. Focus Media shares have risen more than 52% this year. According to the third quarterly report, focus media, whose main business is media advertising business, achieved an operating revenue of 7.875 billion yuan and a net profit of 2.202 billion yuan. The number of shareholders of the company was 140100, a decrease of 17.65% compared with the previous reporting period. Over the past six months, more than 30 securities companies have given buying advice. In the third quarter, 70 institutions gathered in focus media, with 199 heavily held funds, holding 2 billion shares and a market value of 16.147 billion yuan. After hours on the 11th, there was a divergence in the market. Shenzhen Stock connect sold 445 million yuan and bought 448 million yuan. Three institutions bought nearly 300 million yuan in total, and three institutions sold 175 million yuan in total. In addition, China Merchants Securities Shanghai Century Avenue business department bought 100 million yuan. < / P > < p > recently, flash stocks in the A-share market are frequent. According to Yang Delong, chief economist of Qianhai Kaiyuan, flash stocks are mainly due to the lack of performance support of related companies and the sharp rise and fall of stock price driven by short-term funds. In the future, the market polarization will become more and more obvious. Investors will try their best to choose some undervalued blue chip stocks, consumer white horse stocks and high-quality growth stocks. These stocks have good liquidity and stable performance growth, which are suitable for medium and long-term investment. < / P > < p > Disclaimer: the purpose of this article reprinted by CNFC is to convey more information, and it does not represent the opinions and positions of CNFC. The content of this article is for reference only, and does not constitute an investment proposal. Investors operate on this basis at their own risk. < p > < p > Chinanet is a state key news website under the leadership of the Information Office of the State Council and the management of China foreign language publishing and Distribution Bureau. Through 11 versions in 10 languages, the website publishes information 24 hours a day. It is an important window for China to carry out international communication and information exchange.