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Re:Vanguard Is Growing Faster Than Everybody Else Combined by tryitnow on Wednesday April 19, 2017 @12:04PM (#14148731)
It's been a looong time since I've studied financial economics but I do think there's an active research literature around this topic (under the topic of market microstructure maybe?).

If I recall correctly (and again, it's been a while), I think the amount of passive funds has to be quite substantial for markets to be really bad at reflecting value over the long run.

Re:Vanguard Is Growing Faster Than Everybody Else Combined by L_Rahman on Wednesday April 19, 2017 @12:12PM (#14148836)
And it's a recurring topic in Matt Levine's Money Stuff newsletter. The finance community is not only aware but actively thinking about the ramifications of the situation.