Apple stock continues its steady rise in light of its stunning Q1 2012 (calendar Q4 2011) results in all three of its major product categories. AAPL pushed past its previous record closing high of $455.12 on Friday to end Monday at $463.97 and a market capitalization of $432.59 billion, the most highly-valued publicly-traded company in the world. The stock is edging even higher in after-hours trading, currently at $464.55 as of 9pm EST.