Originally Posted by StruckPaper
Can anyone explain why Apple needed to update SEC if the *revised* estimates are in fact within the previously suggested range?
They didn't have to.
SEC rules are a little confusing, but as long as they're expecting to stay within the previous guidance, there's no rule requiring them to make any announcements.
They probably did it for one of two reasons:
1. If the street numbers were at the low end of the range, they may have wanted to discourage low-ball pessimism.
2. They may be concerned that the massive iPhone sales weekend will make analysts overreact in the other direction and estimate very high numbers. If Apple then fails to meet those numbers (no matter how ridiculous they might be), the stock drops after the earnings report. This announcement basically tells people not to expect some miraculous pie in the sky results.