Cannabis is now legal in 37 states for medical use and fully legal in 23 states, but on a federal level, its status has barely changed since the 1970s. Cannabis currently shares the same federal classification as heroin, ecstasy and LSD. Cannabis stocks jumped after the U.S. Department of Health and Human Services recommended easing restrictions on marijuana in August. However, cannabis also has seen slower-than-forecast progress on the legalization front. These two factors highlight…