美股散户没有退缩，反而再次爆发强大的投资热情！

Core Viewpoint - The article highlights the resilience and increasing participation of retail investors in the U.S. stock market during the first half of 2025, despite facing challenges such as volatility, inflation, and tariffs. Retail investors have shown strong bullish sentiment and a tendency to buy on dips, leading to record trading volumes and net inflows into the market [4][6]. Summary by Sections Retail Investor Activity - In the first half of 2025, retail investors bought stocks worth $3.4 trillion and sold $3.2 trillion, resulting in a total trading volume of $6.6 trillion [4]. - Retail net buying reached $155.3 billion, surpassing the previous record set during the meme stock craze in 2021 [6]. - Average daily net inflows from retail investors were $1.3 billion, a significant increase of 21.6% compared to 2024 [6]. Market Dynamics - The market is experiencing a shift from being dominated by large tech companies to a broader participation across various sectors, including cyclical stocks and growth-oriented small-cap companies [7]. - The Russell 2000 small-cap index has shown strong rebounds, indicating a recovery in market breadth and providing more investment opportunities [7]. - Companies with previously low valuations and improving fundamentals are gaining investor interest, particularly those involved in AI and technology [7]. Economic and Policy Considerations - The forward P/E ratio of the S&P 500 is approaching 22, significantly above historical averages, raising concerns about potential market corrections [7]. - Key upcoming events include the potential renewal of Trump's tariff suspension policy and the direction of fiscal spending towards AI infrastructure investments, which could influence market trends [8]. - The article suggests that the U.S. stock market in 2025 exhibits characteristics of high risk, high participation, and high growth, with retail investors playing a crucial role in driving market dynamics [8][9].