解密牛市系列之五：A股牛市见顶三重预警框架

Group 1 - The core viewpoint of the report is that the peak of a bull market is driven by multiple factors, including policy tightening, external risks, fundamental downturns, and market trading signals [1][15][16] - The report identifies three main categories of warning signals for a bull market peak: policy and external environment factors, fundamental factors, and market trading factors [1][15] - Historical examples illustrate that policy tightening and external risks have been significant warning signals in previous bull markets, such as the tightening of monetary policy and the impact of the subprime mortgage crisis from 2005 to 2007 [2][17][18] Group 2 - A downturn in fundamentals is highlighted as an important warning signal for a bull market peak, with indicators such as GDP growth rates and corporate profit growth showing consistent declines at the end of historical bull markets [2][35][40] - The report emphasizes that the decline in profitability of leading sectors serves as a key indicator for structural bull market peaks, as it reflects a shift in market sentiment and risk appetite [2][42][43] Group 3 - Trading signals are crucial for confirming a bull market peak, with high turnover rates and the number of stocks reaching new highs being significant indicators in a broad bull market [3][50] - The report notes that while absolute valuation levels may not effectively signal a peak, relative valuation metrics such as the five-year moving average of price-to-earnings ratios can indicate market overheating [3][62][63] Group 4 - The current A-share market does not show clear warning signals of a bull market peak, with supportive internal policies and improving fundamentals suggesting continued market performance [4][12] - The report indicates that while current market valuations are relatively high, turnover rates are at historical average levels, and the proportion of stocks reaching new highs is low, which does not signal an imminent peak [4][27][28]