9点15到9点25挂单能成交吗？集合竞价规则深度解析

Core Insights - The article highlights the complexities of the opening auction process in the stock market, emphasizing the strategic maneuvers of institutional investors versus retail investors during the critical 10-minute period from 9:15 to 9:25 AM [1][2]. Group 1: Auction Phases - The auction period is divided into two phases: from 9:15 to 9:20 AM, where orders can be canceled, and from 9:20 to 9:25 AM, where orders become irrevocable [1][2]. - During the first phase, a high cancellation rate of 40% is noted, indicating potential manipulation by institutional investors who may place large orders to create false price movements [1][2]. - The second phase requires that all buy orders at or above the determined opening price and sell orders at or below that price are executed, with a focus on maximizing transaction volume [2][4]. Group 2: Case Studies - A case study of Ning Shui Group illustrates how institutional investors can manipulate prices by placing large orders and then retracting them, leading to retail investors being trapped at inflated prices [5]. - Another example involves Fengxing Co., where continuous selling created panic, resulting in a higher actual transaction price than displayed, demonstrating psychological tactics in trading [5]. - The case of Huayu Mining shows how sudden large orders can signal strong institutional control, leading to significant price increases [6]. Group 3: Trading Strategies and Indicators - The article discusses the importance of observing order cancellations before 9:20 AM as a signal of potential price movements, while after 9:20 AM, the focus should shift to the changes in unmatched buy and sell orders [10]. - A 5% rule is introduced, where if the auction volume exceeds 5% of the previous day's volume, it indicates institutional involvement, while lower percentages may suggest less credible movements [9]. - The article advises caution against aggressive pricing strategies, as orders that exceed the price limits are deemed invalid, and emphasizes the need for calm decision-making during the auction phase to avoid emotional trading [12][14].