Profit taking by investors and also it may be that some investors consider share price to be overpriced or over-bought. Also what about new wave of smart phones that are posing challenges in near future to iPhone. Sales may well dip as a result of andriod technology now appearing on cheaper phones from likes of Samsung, for example. Certainly here in Europe Apple is considered expensive end of market and in great recessions people are less likely to look at that end of the market. Can't speak for US/Canada attitudes. Finally in current climate stock prices are unusually volatile. Also the psychological effect of price of share can be interesting. Depends too what stock analyst you have info on. Analyst hype often foeshadows a fall in stock price. Hope this helps. Good company though!