This is the rule on the first day of IPO trading. Call auction shall not exceed 65,438+020% of the issue price. After the opening, the trading will be suspended for 30 minutes after the continuous bidding stage, when the increase reaches 65,438+00% of the opening price. The highest price of continuous bidding throughout the day shall not exceed 144% of the issue price.

Classification of stock price changes on the first day of IPO:

1. When the market is at the end of the decline and enters the bottoming stage, the market sentiment is low, the opening price of new shares is generally below 50%, and even some stocks are close to the issue price. This is the best buying period. Once the market rebounds, such stocks will rise. For example, CITIC Securities, which was listed on June 6, 2003, was at the bottoming stage of the market. Its opening price was 5.5 yuan, and it closed in 5 yuan that day, which was 10% higher than the issue price. Later, the market rebounded and the stock became the leader.

2. When the market rises: At this time, the new shares are flat, and investors can actively participate in the speculation. 3. When the market is at the end of the upswing, the market sentiment is high, and the opening price of new shares is very high, some of which reach more than 200%. At this time, the risk of new shares is the greatest. Once the market falls from a high level, such stocks fall the most. For example, Guo Tong Pipe Industry, which was listed on February 19, 2004, reached 20.98 yuan on the opening day, 200% higher than the issue price, and then the stock fell by 40% when the market fell.

4. When the market is in the down stage, the new shares will go flat and go down, and the chances of participants making profits are extremely small, so don't participate. Only when the market enters the end of the decline and bottoms out will it be a real buying point.