Interesting Bloomberge Buisiness articleHere is an excerpt: "We wanted to make sure they couldn't undercut the links we created between compensation and long-term performance," says Feinberg. If executives at the companies could hedge their stock, he adds, "they wouldn't have to worry about how [the stock] does."
Link:
Bloomberge
In Canada the rules and regulations are much looser and lss enforced than USA. It explains in many ways why the middle class is shrinking year after year.
By the way its an interesting read. I am outlining other ways a stock could be traded from any companies in the stock market if they decide to do so.
All in my opinion.