Apple (AAPL) and Microsoft (MSFT) find themselves in a tight race over bragging rights to the title of world's most valuable publicly traded company after AAPL stock popped following a big analyst upgrade.
A poor start to the year already had some bulls saying it's time to buy the dip in Apple stock. But when one of Wall Street's largest broker-dealers joined the chorus before Thursday's opening bell, it helped Apple recover billions in market value.
