这轮牛市，完全是因为资金的涌入

Group 1 - Capital Fund Management (CFM) is a prominent quantitative hedge fund based in Paris, managing approximately $20 billion in assets, making it one of the oldest and largest quantitative funds in Europe [1][9] - The founder and current chairman, Jean-Philippe Bouchaud, is a theoretical physicist who transitioned into finance after critiquing the Black-Scholes option pricing model [2][19] - Bouchaud argues that the recent bull market in the stock market is largely driven by continuous capital inflows rather than improvements in corporate earnings or economic fundamentals [3][25] Group 2 - Bouchaud's perspective is based on the "inelastic markets hypothesis," which suggests that the impact of capital inflows on market capitalization is significantly greater than traditional economic theories suggest [4][24] - Research indicates that for every $1 invested in the stock market, approximately $5 in market value is created, and this effect is long-lasting [5][23] - The hypothesis challenges the efficient market hypothesis, positing that capital flows have a much larger and more permanent impact on market dynamics than previously thought [24][25] Group 3 - Bouchaud emphasizes that this phenomenon is not limited to the U.S. market but could also affect European and global markets, raising concerns about potential consequences if capital flows reverse [6][25] - The rise of passive investment tools, such as index funds and ETFs, has led to a significant increase in capital inflows, particularly in the U.S. market, where firms like Vanguard and BlackRock manage substantial assets [5][25] - Bouchaud expresses concern that the increasing reliance on passive investment strategies may exacerbate market "inelasticity," leading to prolonged upward trends that could create bubbles [26][27]