Canopy Growth (NYSE: CGC ) stock is down almost 10% since Bank of America downgraded the stock on Sept. 27 . CGC stock is now down more than 54% overall in the past year. But investors need to understand more than just the downgrade headline. I can’t say with any certainty that things are going to get better for Canopy Growth stock in the next few months. But nothing has fundamentally changed about the long-term cannabis bull thesis.