The Bloomberg article mixed Bury's words and the author's words quite a bit, and I'm beginning to wonder if the whole reason we're having this discussion is because some important nuance was lost.

It's hard to see why Mom and Pop buy and hold index investors should care about the liquidity risk Bury talks about...market cap weighted funds will be fine in the long run because the ratio of each underlying stock to a fund share will be constant through the temporary price fluctuations...so no money is lost if the price crashes and then comes back to the same sport shortly after.

Perhaps there are other market participants who are leveraged and would find themselves insolvent if indexes cause a liquidity problem? I just don't see how the fund investors themselves would be hurt if underlying stock prices went out of whack for an afternoon.