The AdvisorShares Pure U.S. Cannabis ETF (NYSE:MSOS) , which invests in U.S. marijuana and hemp stocks, is seeing a surge in Momentum, according to Benzinga’s Edge Stock Rankings, as Washington starts warming up to the industry with major policy shifts in recent months.Cannabis ETF Sees Momentum SurgeThe Momentum score in Benzinga’s Edge Rankings indicates strength in a stock relative to others, and is assessed based on price movements and volatility across multiple time frames, before being ranked as a per ...