In this July 19, 2018, file photo Brendan Kennedy, third from right in front, CEO and founder of British Columbia-based Tilray Inc., a major Canadian marijuana grower, leads cheers as confetti falls to celebrate his company's IPO (TLRY) at Nasdaq in New York. Investors are craving marijuana stocks as Canada prepares to legalize pot next month, leading to giant gains for Canada-based companies listed on U.S. exchanges. (AP Photo/Bebeto Matthews, File).
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