Marijuana stocks and ETFs are creating quite the buzz! Increasingly the states are saying yes to medical and recreational use. The U.S. Federal laws still says no. Personally, I bought a marijuana stock earlier in 2017 and still own it. The medical benefits are proven. It has performed. As an investor, the growth opportunity is compelling. However it is important to realize the Federal laws and potential aggressive enforcement are a real risk (or buzz kill) that could crush this investment opportunity.