均值回归真的有用吗？

Core Viewpoint - Mean reversion is a common investment strategy, but it has fundamental flaws as not all stocks that decline will recover, and only a small percentage of companies generate significant wealth [2][5]. Group 1: Mean Reversion and Market Statistics - A study by Henrik Bessembinder shows that from 1926 to 2024, only about 2% of U.S. stocks contributed to 90% of net wealth, and globally, only 2.4% of stocks created $75.7 trillion in incremental value [2]. - Between 1926 and 2006, only 50.8% of stocks achieved positive returns, with an average return of just 9.5%, while U.S. Treasury bonds yielded 1928% during the same period [3]. - Research by Mauboussin & Callahan indicates that from 1984 to 2024, 6,500 U.S. stocks experienced drawdowns of over 85%, with 54% of these stocks never returning to their historical highs [4]. Group 2: Investment Strategy Insights - The data suggests that not all stocks will rebound after a decline, and only a few companies can reach new highs, challenging the notion of buying low and selling high [5]. - The stock market's returns follow a power-law distribution, indicating that most companies are not worth the investor's attention, and the low-buy high-sell mentality is flawed [6]. - According to "The Long-Term Stock Market Secret," stocks are the highest returning asset class over the long term, but 96% of stocks underperform the weighted index [6]. Group 3: Psychological Factors in Investing - Nobel laureate Richard Thaler discussed "mental accounting," where investors often increase their positions in losing stocks while selling winning stocks too early, leading to poor decision-making [7][8]. - The long-term value in the stock market is generated by a small number of exceptional companies, emphasizing the need for focused investment in the top 1% of companies [8]. Group 4: Investment Portfolio Overview - The company has completed a follow-up investment plan of 1 million, with a cumulative return of 18,544, representing approximately 3% return, or an annualized return of 6% [11]. - The investment portfolio is diversified across multiple assets and regions, including domestic bonds, A-share growth funds, broad-based indices, and overseas markets, with gold as a foundational asset [12]. Group 5: Market Outlook - The company is optimistic about both domestic and U.S. markets, highlighting the G2 era of global economy, with significant innovation and manufacturing capabilities in China and the U.S. [14]. - The Nasdaq 100 index is noted for its strong performance, covering 100 leading companies and providing better returns than the S&P 500 over the past 20 years [14].