Black Sky Stock and Kynd Cannabis Company are among some cannabis names. Best Cannabis stocks to buy could be Cronos Group (CRON) and Tilray (TLRY). Also, ETFs to follow are THCX and YOLO. As more states are legalizing the recreational use of marijuana, Paul Murray examines investment opportunities within the cannabis sector as well as delivers his outlook for the space. So far 37 states have approved medical use and 18 states have approved recreational use of marijuana, and Congress recently passed the Fair Banking Act to allow marijuana businesses access to the banking system.