Reason for today's drophttps://www.bloomberg.com/news/articles/2018-01-04/pot-stocks-plunge-on-report-u-s-to-rescind-expansion-policy
These policies mean that the legislation of cannabis could slow down or be even stopped completely - which may seem bad at first, but in the long term GHG could even benefit from these developments as they are not the the THC-cannabis game, but in the CBD game, which would certainly not be touched by the restriction of cannabis legalisation.
Anyway, I think that since we will definitely see some news shortly, GHG's stock price will certainly rebound quickly and reach then never before seen heights!