Because they think that a lot of people will want to get in on the historically massive and well-known companies, which would lead to outflows if the index doesn't pick them up fast enough?
It will lead to outflows either way. And I say that as someone who has been an Index fund evangelist for years, strongly considering selling my index funds to build my own collection of companies that I believe in long term.
So why not just stick to the roles we agreed on when buying in?
So why not just stick to the roles we agreed on when buying in?