How concentrated is global stock market wealth creation among firms?
Core argument: Global stock market net wealth creation totaled $75.7 trillion between January 1990 and December 2020, with the best-performing 1,526 firms (2.39% of the sample) accounting for all of it.
We calculate net global stock market wealth creation of $US 75.7 trillion btw 1990 and 2020. Wealth creation is highly concentrated. Five firms (0.008% of the total) with the largest wealth creation during the January 1990 to December 2020 period (Apple, Microsoft, Amazon, Alphabet, and Tencent) accounted for 10.3% of global net wealth creation. The best-performing 159 firms (0.25% of total) accounted for half of global net wealth creation. The best-performing 1,526 firms (2.39% of the total) can account for all net global wealth creation. Skewness in compound returns is even stronger outside the U.S. The present sample includes 46,723 non-U.S. stocks. Of these, 42.6% generated buy-and-hold returns measured in U.S. dollars that exceed one-month U.S. Treasury bill returns over matched horizons. By comparison, 44.8% of the 17,776 U.S. stocks in the present sample outperformed Treasury bills.

