Shares of Apple (AAPL 1.79%) fell approximately 6.5% this week, and on one single day, the company lost $35B in market value. Apple's losses look even more dramatic when you compare its current price to its all-time high of $705 per share in September. But what caused the drop? In this video, Motley Fool analyst John Reeves discusses some of the opinions on why the stock fell recently, including thoughts on increased competition, and possible institutional rebalancing. But then he asks the bigger question: If the core investing thesis in Apple hasn't changed, and the fundamentals of the company are still best in class, do I really care about this recent downturn? At most, it represents an excellent time to buy.