This prevents American cannabis companies from going public on the stock market, but Canadian businesses that don't operate south of the border aren't subject to these restrictions. Several of the largest Canadian canna-businesses are now deciding to sidestep their local stock markets and take a shot at American finance. This February, Toronto-based Cronos Group, one of the largest players in the Canadian market, became the first cannabis company to ever list on NASDAQ. Canopy Growth saw its market share increase by 100% after alcohol giant Constellation Brands invested nearly $200 million in the company. Constellation just increased its stake in Canopy by another $4 billion this year, causing yet another spike in its share price. Tilray, another major Canadian canna-business, has also seen its market value triple since July. Investing in the Canadian cannabis industry seems like a sure bet, but the U.S. Securities and Exchange Commission (SEC) is warning investors that not every cannabis stock is legit.