Apple overtakes Microsoft as most valuable stock of all time

With Monday's run, its market capitalization clears $623 billion
FORTUNE -- Apple's (AAPL) share price went on a tear Monday, gaining more than $16 a share to hit $664.74 in late morning trading.
With 937.41 million shares outstanding, that put its market cap at better than $623 billion -- an all time record for a publicly trading company.
The previous record holder was Microsoft (MSFT), whose market cap hit $618.9 billion on Dec. 30, 1999. Adjusted for inflation, according to the AP, that equals about $850 billion in today's dollars. Microsoft is currently valued at $257.6 billion.
The chart at right shows the two stock's performances over the past decade. You have to look closely to see Microsoft (represented by the green line at the bottom) because compared with Apple, its share price has basically flatlined.

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