每日钉一下（什么是估值百分位？如何参考使用呢？）

Group 1 - The article discusses the importance of index funds as a starting point for many investors and offers a free course on investment techniques for index funds [2] - The course includes notes and mind maps to help learners understand the course structure and learn more efficiently [2] Group 2 - The article explains the concept of valuation percentiles, which measure the current valuation's position within historical valuations [7] - There are two types of percentiles: time percentile, which indicates the current valuation's position over a historical period, and space percentile, which shows the current valuation's position between historical minimum and maximum valuations [8][9] - The article emphasizes that valuation percentiles are useful indicators, as valuations tend to revert to their mean over time [9] - Different valuation metrics have different standards for interpretation; for example, lower percentiles for PE and PB ratios are preferable, while higher percentiles for earnings yield and dividend yield are better [11] - The article suggests that each valuation metric is suitable for specific types of assets, and the stability of the data should guide the choice of valuation metric [11]