it's all discounted my guess is profit booking will start before BB10 release. Also today just $0.39 increase is very small compared to buy out stuff going on. who is selling all the volume? my only concern is if with all the good reviews BB10 does not take off it will be a big selloff and no suprise to see stock going to $10. Remember shorts will try to take advantage to knock off the price if any -ve news comeout.
Also I hear Samsung planning to release smart phone for business world. not sure if it is true. if it is BB10 will have tough time.