每日钉一下（投资指数基金的人越来越多，会让指数基金收益降低吗？）

Group 1 - The article discusses the increasing popularity of index funds among investors and questions whether this trend will lead to lower returns for these funds [2][8]. - The core principle of index funds is low cost, which is emphasized as a key reason for their growing market share [8][10]. - It is noted that all stocks are owned by shareholders, and the actual returns for investors are their investment returns minus costs, making index funds one of the lowest-cost participants in the market [9][10]. Group 2 - The article presents a hypothetical scenario where an investor, instead of using index funds, creates a portfolio of high-dividend stocks and maintains a patient, low-turnover strategy, which could also lead to superior returns [11][12]. - Despite the advantages of index funds, it is suggested that they will not completely dominate the market due to human behavior, as most investors struggle with patience and discipline [12][14]. - The historical performance of dividend and value index funds in the A-share market is mentioned, indicating that they have outperformed the market over the past 20 years, yet they still represent a small portion of the overall market [13].