You're reading that stat incorrectly: > "The average age of a company listed on the S&P 500 has fallen from almost 60 years old in the 1950s to less than 20 ye

You're reading that stat incorrectly: > "The average age of a company listed on the S&P 500 has fallen from almost 60 years old in the 1950s to less than 20 years currently," The reason for that is there have both been a lot of mergers and a lot of new companies that have gotten huge in a small amount of time, especially in tech (Google, Amazon, Facebook, Netflix, NVIDIA, etc).