【策略】A股牛市见顶三重预警框架——解密牛市系列之五（张宇生/郭磊）

Core Viewpoint - The peak of a bull market is a result of multiple factors interacting over time, including policy and external environment factors, fundamental factors, and market trading factors [4]. Group 1: Warning Signals for Bull Market Peaks - Policy tightening and external risks are key warning signals for bull market peaks, with historical examples including internal policy tightening and external shocks like the subprime crisis from 2005-2007, and trade frictions from 2016-2018 [5]. - A decline in fundamentals is a significant warning signal for bull market peaks, characterized by a downturn in core profit metrics such as actual GDP growth, nominal GDP growth, and A-share net profit growth [5]. - Structural bull markets show that the decline in leading sectors' profit growth serves as a leading indicator for the overall market, reinforcing the signal of a bull market's end [5]. Group 2: Trading Signals for Bull Market Confirmation - Trading signals are crucial for confirming bull market peaks, with different signals being more applicable to comprehensive bull markets versus structural bull markets [6]. - High turnover rates and the number of stocks reaching new highs are more indicative of comprehensive bull markets, signaling overheating and exhaustion of upward momentum [6]. - Valuation-related signals, such as historical high price-to-earnings ratios and significant shareholder net reductions, serve as universal warning signals across various bull markets [7]. Group 3: Current Market Outlook - Currently, there are no clear warning signals indicating a peak in the bull market, suggesting that future performance in the A-share market remains promising [8]. - Internal policies are still actively supportive, and the overall stability of US-China relations is improving, with external risks gradually easing [8]. - The fundamentals of the A-share market are on an upward trend, with a low probability of continued decline, particularly in the context of accelerating AI industry development [8].