very mature decision by s&p, but at the same time will this not hurt spacex and other big IPOs? i thought the reason these mega IPOs are coming is because investors have run out of money and they companies need access to broader market capital to sustain. without 401k and other funds, won't this just hasten the bubble burst? am i missing something?

This is why people are freaking the heck out and demanding that all the index funds MUST include the doomed stocks because they're just that important and totally aren't a doomed bubble you guys.

Not all viewpoints are unbiased overviews of the markets just wanting fairness. Some have always been trying to sell you something that's not what it seems, and they can be… vituperative.