Until recently, it was tough to invest in marijuana stocks. The option was either to purchase securities on foreign exchanges — such as in Canada — or on the over-the-counter (OTC) markets. But as the marijuana market has gone mainstream, we have seen more companies list on major U.S. exchanges. The next company looking to make the switch is Village Farms International (OTCMKTS: VFFIF ). VFFIF stock recently announced plans to trade on the NASDAQ .