There's obviously LOTS at work here to shoot their share value that high but a VERY BIG thing that is worth considering- the downfall of RIM. Between the massive blackout last year and contract renewals being up for millions I think a HUGE portion of blackberry owners , especially in north american switched to ANYTHING else. MOST went with an iphone. I know I technically did but it's a move I'd have made sooner if I wasn't locked into a contract.
I've noticed with apples rise in popularity , especially in phone markets , there seems to be a proportional increase of people who think iphone owners are brainwashed sheep. It's almost as though they've never used the product or just don't want to try it. Anecdotal evidence but MOST people I know these days have switched to an iphone. The only complaint I get is that the facebook app is a buggy piece of shit (which it can be) but facebook made the app , not apple. It also doesn't run any better on other formats. Meanwhile, all the android owners I know (mostly samsung products) have battery issues, mechanical failure and all manner of shoddy build quality concerns. Some of them have only had their phones for a few months and are already experiencing problems. I realize the iphone is NOT immune to this sort of thing but when I do hear about someone needing a fix for it, it's a self inflicted wound "I dropped it and it cracked, I hacked it and it bricked, etc".
With this much market share I wonder how much higher they can really go though, blackberry is pretty much dead and android users seem content for the most part , aside from iphone 5 and eventually 6 upgrades where's additional market going to come from ?