The have until Dec 18th to complete their buying.
No, they really don't.
This has been explained like 50 times lately, not sure why folks keep repeating the claim.
There are conflicting opinions on this. Personally, I fall into the camp that believes that Index funds are limited to buying within three business days of the inclusion date. Source,
SPY prospectus:
Conflicting opinions- but only one set of facts.
The time any fund has to buy the shares are set by the rules of that fund.
Each fund has its own rules.
SPY- as you cite, has 3 days before
and after the inclusion date to buy.
Other funds have 7 days either way.
Other funds have other windows.
Some also include specific disclaimers allowing the managers to briefly deviate from the normal rules in situations they think appropriate.
That said-
Furthermore, why would an index fund buy early? Their purpose is to simply track the index, not beat it. They should be agnostic to the share price, and could be placing their jobs in jeopardy by purchasing outside the days surrounding the inclusion date.
In other words, I think all of this run-up can be attributed to speculators, benchmarked funds, and others hoping to dump shares to index funds at as high of a price as possible.
Absolutely... most of the larger funds I'm aware of at least would not, and in fact by their own rules
could not be buying this early... and no earlier than Dec 14... (and potentially as late as Dec 28).
Does that mean the Index funds cannot start buying TSLA before Dec.11, since they do not know what to sell to free up the money ?
See above.
Most can't buy because their own rules don't allow buying that far ahead of inclusion date.
Who they're dropping doesn't really matter that much, it's not like they're dropping someone with the same weighted market cap as Tesla where it'd be dollar for dollar anyway- they'll need to sell down some of EVERYTHING.
Remember that index funds are not the only big buyers for this event. Funds benchmarked to the index
might buy even more than the indexers. (Benchmarked funds have $6.6 trillion in assets versus $4.6 trillion in the index funds,
according to Rob Maurer.)
It is not even clear that indexers will be done buying on Dec 21, according to several sources cited by Rob. But even if the indexers are done then, when will the benchmarkers buy? While the indexers are gobbling up shares?
This argument is really perplexing.
Since you're not an index fund you can buy or sell whatever shares you want whenever you want (within the bounds of your fund rules- like if you're a real estate fund you probably can't buy Boeing or whatever)
If your goal, as the benchmarkers goal is, is to BEAT the returns of the S&P 500, you'd
already own a bunch of Tesla and would have for a while now
You'd have no need to buy a bunch more during a price spike.... on the contrary the spike would make the bunch you smartly bought 6 months or a year ago look fantastic on your results...
(see ARK funds results vs an S&P500 index fund for some examples).