回顾最近10年我所经历的五个牛市：告诉你市赚率到底有没有用？

Core Viewpoint - The article discusses the concept of "市赚率" (Market Earnings Ratio) and its application in evaluating investment opportunities, emphasizing its importance in identifying undervalued stocks and the necessity of patience in investing [3][8]. Group 1: 市赚率 Definition and Calculation - 市赚率 is defined as the ratio of Price-to-Earnings (PE) to Return on Equity (ROE), formulated as 市赚率 = 市盈率 / 净资产收益率 (PR = PE / ROE / 100) [3]. - The author introduces a modified 市赚率 that incorporates dividend payout ratios, using a correction factor (N) based on the payout rate, which adjusts the 市赚率 for companies with different dividend policies [4][5]. Group 2: Historical Market Experiences - The author reflects on various bull markets from 2011 to 2025, noting that despite the invention of 市赚率, there were instances of being misled by market trends, particularly during the 2015 bull market [6]. - In the 2018 bull market, the author successfully doubled the portfolio value over two years by strategically rotating investments from overvalued to undervalued stocks [6][7]. - The 2019 market was characterized by a focus on buying undervalued stocks and selling overvalued ones, despite the author's initial perception that it was not a bull market [7]. Group 3: Investment Strategy and Performance - The author emphasizes the importance of patience in investing, suggesting that stocks with strong economic moats should be purchased at significant discounts (60% off), while those with weaker moats should be bought at even deeper discounts (40-50% off) [8]. - The article concludes with a summary of annualized returns, indicating a 20% annualized return during the bull market years (2016-2019) and a 15% return during the bear market years (2020-2024), leading to an overall 10-year annualized return of 20% [7].