Saturday, 18 April 2026

Performance of Individual U.S. common stocks from 1983 to 2006 did not follow the familiar bell curve

 






Based on the five images from the article "The Capitalism Distribution" by Longboard, here is a summary of the key findings:

The article examines the performance of individual U.S. common stocks from 1983 to 2006 and finds that returns follow a highly non-normal ("fat-tailed") distribution, unlike the familiar bell curve. Most people think of index returns (like the S&P 500 or Russell 3000), but the reality "under the hood" is dramatically different:

- **Most stocks perform poorly:** 39% of all stocks had a negative total return, and 18.5% lost at least 75% of their value. 64% of stocks underperformed the Russell 3000 index.

- **A small minority drives all gains:** The worst-performing 75% of stocks collectively had a total return of 0%. The best-performing 25% of stocks accounted for *all* of the market's net gains. If an investor missed that 25%, their overall return would have been zero.

- **Why indexes still rise:** Market-cap-weighted indexes (like the Russell 3000) naturally favor winners (whose prices rise and gain weight) and punish losers (whose prices fall and are eventually delisted). Losing stocks also tend to have shorter lifespans (6.85 years vs. 9.23 years for winners), limiting their negative impact.

- **Common trait of winners:** The biggest winning stocks (e.g., Cisco, GE, Microsoft, Intel) spent a disproportionate amount of time making new multi-year highs on their way up—hundreds of times over many years. Conversely, losers spent zero time at new highs and more time at multi-year lows. Many winning stocks were eventually acquired (60% of top annualized return stocks), but most (68% of top total return stocks) are still trading as large caps.

- **Implication for investors:** This persistent non-normal distribution across stocks, commodities, currencies, and fixed income suggests that investors should be aware of their investment strategy to be effective in capturing profits across global asset classes.







No comments: