每日钉一下（基金经理投资风格漂移，有什么不利后果？）

Core Viewpoint - The article discusses the concept of investment style drift among fund managers, highlighting its negative implications for long-term performance and competitive advantage [2][4]. Group 1: Investment Style Drift - Investment style is a reflection of a fund manager's long-term investment philosophy, strategy preferences, and stock selection logic [2][4]. - Many fund managers exhibit mediocre performance due to a lack of a stable investment style, leading to frequent shifts in their investment strategies, known as style drift [4]. - Style drift is detrimental to fund operations for two main reasons: it hinders the ability to achieve long-term returns and makes it difficult to establish a competitive advantage [4][6]. Group 2: Long-term Performance - The A-share market demonstrates characteristics of style rotation, with different styles performing strongly in different years, such as growth style in 2015 and value style from 2016 to 2018 [5][6]. - Predicting which investment style will perform well in the next phase is challenging, and chasing market trends can lead to inconsistent results, negatively impacting long-term returns [6]. Group 3: Competitive Advantage - Fund managers have limited time and energy to analyze numerous reports and conduct field research, which restricts their ability to focus on a select number of stocks [7]. - A fund manager typically can only deeply understand a few stocks within specific styles or industries, and spreading efforts too thin can lead to superficial knowledge [8]. - Maintaining a stable investment style allows fund managers to deepen their expertise in their favored areas, thereby building a competitive advantage [8].