Apple's stock soared to an all-time high last night as the company reported its most profitable quarter ever. Its fiscal 2009 fourth quarter - ending September 26, 2009 - saw Apple post revenue of US$9.87 billion (a 25 percent year-on-year increase) and net profit of US$1.67 billion (a huge 47 percent yearly increase). It sold 7.4 million iPhones in the quarter, representing seven percent unit growth over the year-ago quarter.