金融破段子 | 明天后天大后天的市场，都无法预测

Core Viewpoint - The article discusses the phenomenon of overconfidence in investment decisions, highlighting how investors often make contradictory judgments based on market movements, leading to poor decision-making and increased trading costs [5][8]. Group 1: Investor Behavior - Investor A's behavior illustrates the tendency to make impulsive decisions based on recent market performance, switching from aggressive buying to a defensive stance within a short period [4][6]. - Overconfidence is a common trait among investors, leading them to overestimate their abilities and make high-frequency decisions that may not reflect the actual market conditions [5][8]. Group 2: Market Dynamics - The article emphasizes the unpredictability of the market, stating that even in a bullish phase, short-term market movements are difficult to forecast [8]. - It warns that frequent decision-making, especially with low-quality judgments, can result in higher transaction costs and losses [8]. Group 3: Decision Quality - The importance of improving decision quality is highlighted, especially during periods of strong market performance, where thorough research is essential for portfolio adjustments [8]. - The article references Peter Lynch's warning about the false confidence many investors have in predicting stock prices, suggesting that such beliefs are often contradicted by market realities [8].