[dijit]

if you can't maintain success for 4 quarters then you weren't really successful.

[lokar]

And even if it's not in the S&P, you can still just buy the stock.

[MyHonestOpinon]

Exactly. With the standard rules, it is easy to buy the stock to opt in. If they change the rules, it is very hard to opt out if your portfolio follows the S&P500, like many passive investors do.