[mrep]

> Jack Bogle's view was that if the market is 50%+ passive indexed that would be bad news.

According to this source, it already is [0]. HN discussion at the time [1].

[0]: https://qz.com/1623418/index-funds-now-account-for-half-the-...

[1]: https://news.ycombinator.com/item?id=20020997