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Take Zhiyun as an example. Before the resumption of trading, its share price performed well in the market, and investors expect it to rise further. However, with the release of the notice of filing a case, all hopes were dashed in an instant. More statistics show that Zhiyun shares closed more than 420,000 lots in early trading, showing investors' panic and helplessness. In fact, the market is full of vigilance against such sudden ST stocks, because it not only means a short-term financial loss, but also a huge blow to future investment confidence.*ST Zhuo Lang: Touching a major violation of the law, facing mandatory delisting.In order to prevent investors from stepping on the minefield of sudden ST, the insiders gave the following suggestions: When paying attention to individual stocks, it is especially necessary to check whether the company has received the notice of filing or other administrative penalties in advance. Once those companies are put on file for investigation, their stocks will almost certainly be greatly affected. Furthermore, most companies that have been ST are usually small-cap stocks, and many companies have a market value of less than 10 billion yuan. According to the statistics of DataBao, among the companies investigated this year, 33 non-ST companies are suspected of violating the rules, and such companies are also called "poor performance stocks" by investors in the market.

In recent years, the supervision of the A-share market has been continuously strengthened. According to the securities law, the stock exchange has the right to give a risk warning to the company when it commits major violations of laws and regulations. This risk warning is usually presented to the public in the form of ST, aiming at reminding investors of potential investment risks. Statistics show that the number of companies that have been ST or *ST reached 76 during the year, setting a record high. Many of these companies have been investigated by regulators for financial fraud or insider trading.Funeng Oriental: Recently, it was put on file by the CSRC.Today, with the ups and downs of the A-share market, the sudden ST of Zhiyun shares has aroused widespread concern among investors. The stock of this technology company has been subject to other risk warnings since December 12, because the company has false records in its 2022 annual report. As soon as the news came out, it directly fell to the limit on the day of resumption of trading, with a drop of 20%. This incident is not only amazing, but also leads to deeper thinking on ST stock.

Tianrui Instrument: Also affected by financial problems, it dropped significantly after the resumption of trading.According to industry analysis, with the gradual improvement of regulatory policies, the number of ST companies has increased, and some investors have suffered losses because they failed to grasp the company's dynamics in time. This is a very regrettable thing. Therefore, when investors choose stocks, they should be especially vigilant against those companies that have been investigated by the CSRC.Investment is risky, especially in the ever-changing capital market, which may face sudden risks at any time. Only by establishing a good investment mentality and choosing carefully can we move forward steadily.