Why is Blackberry stock tumbling?Well its impossible to fight the Big Boys and their HFTs machines.
They can take this stock down at will.
Manipulation without regulation.
Is Blackberry Management helping the Shareholders?
Nope, on the contrary it seems true.
A good SA article worth rereading.
Blackberry Execs costing Shareholders Billions
"BlackBerry shareholders are being pummeled and manhandled into submission and it is costing them billions of dollars. It is a sad case of corporate greed and incompetence run amok"
https://seekingalpha.com/article/1802122-blackberry-execs-costing-investors-billions?source=email_rt_article_readmore
Only my opinion