Apple stock (AAPL) broke through the $400 barrier for the first time on Friday, closing the market session at $400.50 on Friday and maintaining an over-$400 balance in after-hours trading. The stock had temporarily reached above $400 before -- up to a high of $404.50 -- but Friday was the first time it had closed above $400. The volume on the stock was just under 25 million shares, starting the day at $395 and rising 7.5 points or 1.92 percent.
