Apple has sold more than 50 million of its portable music players and 1 billion song downloads from its iTunes Web site. Many companies, including Amazon (AMZN - Get Report), are eager to muscle in on Apple's territory.
Share of Cupertino, Calif.-based Apple have tumbled more than 20% this year, underperforming other big-tech companies including Microsoft (MSFT - Get Report) and Yahoo! (YHOO - Get Report). Analysts expect concerns about the options backdating along with possible delays in releasing the newest versions of the iPod to continue to weigh down the stock. The shares fell $2.15, or 3%, to $56.82 Friday.