Apple Shares Hit Four-Year High

Apple shares closed Tuesday at a four-year high, finishing trading at $53.50. Shares for the day were up $1.05, or two percent, and are trading up slightly higher in after-hours.

A Bloomberg story on the four-year high credits continued iPod buzz for the stockis run-up. The iPod generated 23 percent of Appleis sales last quarter while capturing 82 percent of the market for hard-disk-based MP3 players in U.S. retail stores.