Zuanic & Associates (Z&A) has launched a research service providing guidance for cannabis stock investments. The firm advises avoiding highly leveraged companies, those with governance issues, and companies with a history of shareholder dilution. Instead, investors should seek companies with strong franchises, positive financial metrics, and low dilution risk. The report also mentions recent offerings by Canopy Growth (NASDAQ:CGC) and Tilray (NASDAQ:TLRY) that caused shareholder dilution and price drops.