I get expectations and all that but at what point do the numbers stand on their own? I think just about any company, including Exxon Mobile, would kill for those kind of numbers.
Stock price is the real value of owning shares of the company plus the (let's call it) hype hope of how much the company will grow. When the latter swells up rapidly, it's often referred to as a bubble. The hype hope blows the stock price up sky high. As with any bubble, it requires more and more hope-filled buyers to keep buying or the bubble will begin to deflate. If it deflates enough, the hope crowd starts shifting their hope somewhere else and sells. Selling makes others give up and sell and the bubble deflates more.
When the numbers stand on their own is when you get back to what the company shares are actually worth plus the most pessimistic views on the hype hope part of the equation. Then you have mostly real value represented in the stock price and relatively little hype hope.
In just the last few years, many of us have watched AAPL pump up from below $100 to $700. It's done that on some spectacular growth in both real value AND hype hope. Now some of that hype bubble is deflating. Real value is still substantially below this level. It will never fall all the way to real value, so those that are most pessimistic- but steadfast- won't see it fall all that way to that level. However, those looking for some major bounce needs to see the hype bubble start re-inflating again... or Apple needs to blow out everyone's best estimates for several quarters in a row so that both real value and the hype bubble rapidly grow.
To come in below many analysts high (and crazy high) expectations disappoints those suckered into the market on the hype hope that Apple really could perform that well. How many times must a sucker be disappointed before he sells is similar to how low will AAPL need to fall before someone decides to step out. That shift in sentiment when done by the crowd sometimes marks the approx. bottom for a stock. So if maybe this big drop moves enough people to really sell soon, you might get that "capitulation" event at which point it may be time for the buyers to start buying again. Unfortunately, capitulation is usually marked by the point where everyone seems to be bearish on the stock (everyone believing it is going to go lower from here); we don't have that yet (to many "great buying opportunity" stories/posts/comments by the hope hype crowd or those holding too much stock and can't bear to sell it now).
No matter how high a stock is and how much upside it has, when the buyers stop buying, it can't go any higher. No matter how low a stock falls and how much downside risk it seems to have, when the sellers stop selling it can't go any lower. Right now, AAPL seems to have people believing it is going to go lower. Until people willing to sell stop believing that, it will go lower unless more buyers step up and out-buy the selling. Real value of the shares is still way below this level.