MarketFoolery: 04.21.2011

Published: April 21, 2011, 1:26 p.m.

Apple sells 18.65 million iPhones for the quarter, reports a 95% increase in profits, and crushes earnings estimates.\xa0 Will Apple continue its dominance?\xa0 Is the stock undervalued? What's the biggest threat to Apple? What's the biggest opportunity for Apple?