Core Insights - The report discusses the historical patterns of A-share bull markets, highlighting that each bull market typically experiences two significant waves of volatility, with an average duration of 20-40 trading days and a pullback range of 10%-20% [1][7] - The adjustments during these bull markets are primarily influenced by liquidity and sentiment rather than fundamentals, with concerns over market overheating, regulatory tightening, and external risks temporarily interrupting the bull market progression [1][7] - The report categorizes bull market volatility into four types based on their driving factors: institutional dividend and profit-driven bull, policy-driven recovery bull, liquidity and leverage bull, and liquidity-driven bull transitioning to fundamental bull [1][11][25][39] Group 1: Institutional Dividend and Profit-Driven Bull (2005-2007) - This bull market was characterized by stock reform and macroeconomic prosperity, leading to a "Davis Double Play" effect, with volatility primarily stemming from concerns over market bubbles and monetary tightening [11][19] - The first wave of volatility was triggered by fears of excessive "hot money" and rising inflation, leading to a rotation from large-cap value stocks to small-cap growth stocks [11][19] - The second wave of volatility, known as the "530 Stock Disaster," resulted in a shift towards defensive sectors and large-cap stocks after a significant tax increase on stock transactions [19][20] Group 2: Policy-Driven Recovery Bull (2008-2009) - This bull market was fueled by a massive stimulus plan, with volatility arising from skepticism about policy effectiveness and external economic factors [25][29] - The first wave of volatility was marked by doubts regarding the impact of the "Four Trillion" plan and the ongoing global financial crisis, yet there was no significant style rotation during this period [25][29] - The second wave of volatility was influenced by a downturn in overseas markets, but the dominant sectors remained cyclical and manufacturing without major style shifts [29][35] Group 3: Liquidity and Leverage Bull (2014-2015) - This bull market lacked fundamental support, relying heavily on leverage and reform expectations, with volatility driven by regulatory actions on margin trading [39][43] - The first wave of volatility was initiated by the China Securities Regulatory Commission's crackdown on margin trading, leading to a shift from large financial stocks to growth sectors [39][43] - The second wave of volatility saw renewed regulatory focus on curbing excessive leverage, prompting a rotation back to growth stocks from value stocks [39][51] Group 4: Liquidity-Driven Bull Transitioning to Fundamental Bull (1999-2001) - This period began with a technology-driven bull market fueled by internet speculation and increased liquidity, followed by a transition to a fundamental bull market supported by rising energy prices [55][60] - The initial liquidity-driven phase faced economic slowdowns and deflationary pressures, leading to concerns about growth sustainability [55][60] - The transition to a fundamental bull market was marked by a gradual recovery in economic indicators and a shift in market focus towards cyclical sectors as the economy stabilized [60][62]