Apple just warned its holiday quarter was a huge miss, and the stock is getting crushed (AAPL)

Apple announced on Wednesday that its holiday quarter revenue would be more than 7% lower than it expected. Apple CEO Tim Cook said in a TV interview the shortfall was due to weak iPhone sales, "primarily" in China. Apple stock plunged in after-hours trading. The stock had already dropped over 30% from its previous high in October.  Apple said its revenue for its first fiscal quarter, which ended in December, was going to be significantly lower than it expected, the iPhone giant announced...