Apple shares hit a new high on Monday, becoming the most valuable public company of all time, with the combined value of its shares exceeding a previous record set by Microsoft. Shares closed up 2.6 percent to $665.15 (USD). Apple kept setting record highs in Tuesday trading as its shares hit $674.88, valuing the company around $630 billion for the first time, and more than any other company's prior value. A year ago, Apple shares were around $354 before starting the surges above the $400, $500 and $600 mark.
