Concentration. When the S&P 500 is inherently diversified, it is now remarkably concentrated lately, indicating that a little number of the 500 firms make up a considerable proportion of the whole value of the index by itself. This example is from Wikipedia and may be reused less than a CC https://silver-bullion85173.losblogos.com/36681973/the-basic-principles-of-diversifying-with-silver