" According to sources, BBM Inc. could become a subsidiary of BlackBerry that would focus solely on BBM across BlackBerry, iOS and Android devices."
It's not being sold, just separated out. If it becomes a limited company and trades under a new ticker (BBM), what do the shorts do? If you were 100 shares short, are you now 70 shares short in BB and 30 shares short in BBM? I think they would all have to cover their shorts before the split?????