The ETFMG Alternative Harvest ETF, otherwise known as the Marijuana ETF, began trading today. This fund was originally the Tierra XP Latin America Real Estate ETF before it changed its index, its strategy and its name! It becomes the first marijuana-focused ETF that trades in the U.S. (the Horizons Marijuana Life Sciences ETF trades on the Toronto Stock Exchange).I bought some shares of MJX today to get some exposure to the space. Would you be a buyer of a marijuana ETF right now?Agree = Yes; Disagree = NoComment down below with your thoughts!