[pydry]

Economic mobility != fortune 500 companies being swapped out with one another. Even more so as people increasingly opt out of individual stocks and just end up buying VTSAX or similar.

It almost seems like a metric designed to mislead about economic mobility in fact. Where did you read about it?

[MichaelZuo]

Fortune 500 companies are comprised of people who can receive varying pay packages based on their company's performance, the closer to the top they are the more direct this relationship is.

Seems like a decent proxy measurement to me.