Apple comes back reality. Why is that so hard to believe? Sentiment brought it up to $700 on high hopes, sentiment brings it back down on the reality of the situation. Lots of companies trade at a PE or 10. Also, some companies have higher PE's not only because growth is higher (or maybe not,) but also because it's easier to find growth and profit.
Company A has $100M in earnings and a PE of 16. It only needs to find $60M in earnings to come down to 10.
If Apple had $40B in earnings and a PE of 16, it would need to find $24B in new earnings to come down to 10.
Which is more realistic? The market is only so big. $24B isn't even remotely as easy to come by as $60M or even $4B for that matter. Percentage gains and dollar gains are not the same. It's way harder for Apple to grow very large numbers than it is for Google to grow pretty large numbers.
$130B in cash is nice too, but it's reflected in the valuation. It's not like it has $130B in cash with a $200B valuation.
Was overvalued, probably still is.
Things to worry about:
If the 4 and 4S hurt iPhone 5 sales because, as people say, they were really good phones that were still good enough and significantly cheaper, imagine what the 5/5S might do to iPhone 6 sales. If the 5 -> 6 is even less significant than 4 -> 5, that could really hurt.
Saturation. It's real, it's happening, and it's not good. There are a few big countries left, life China, to look for high growth, but a lot of places are going to be reaching saturation.
Competition. It's getting really really good. Apple is losing some of their edge. Samsung and others are turning out really good phones and returns are diminishing, as stated above. The best iPhone 2 years from now might not be much difference in actual use than a more bargain model. Even bargain models today blow away iPhone from only a couple years ago. As the innovation curve flattens, everything gets within range of one another.
As profitable as Apple is and as nice as their balance sheet looks, it's still a $450B company. How many $450B have ever been undervalued?