Comment by furyofantares

What are you basing this on?

I'm not an expert but it looks to my like 80% of my allocation won't be tracking spacex, because it's mid cap or small cap etc, and the 20% that's in the vanguard growth index might? I assume whoever sets the rules for the fund could change the rules to say companies must be listed for X months if they want to avoid this, right?

And I can change my allocation.

edit: Actually wait, isn't it only nasdaq 100 that's tracking it early, after 15 days rather than 3 months of trading? So 0% of my 401k is exposed to buying it quickly after IPO already, I think.