Shrinking Universe

AM reading: Common Sense of Mutual Funds by John Bogle.  Here is a really cool insight:

Page 359: he is writing about the fact that given normal restrictions (not owning more than 2% of portfolio in any single asset and not owning more than 5% of shares of any individual company), the number of potential investments drops significantly.  For example, using 2009 data, a 1 Billion fund could