$13 Billion in profit a quarter and Wall Street slams their stock. I guess they expect 20% growth year to year on a company valued at $500Billion.
So, even if that's what Wall Street expected it seems ... off... to be down so much.
I think the reality is, some people expected %50 growth, and Wall Street doesn't like the fact that the margins are smaller.
The margins being smaller, however, goes hand in hand with what it takes to produce the massive growth... and the margins will improve.
Which is why markets aren't perfectly efficient... and people have an opportunity to profit from this kind of nonsense.