ZEROHEDGE Coverage ....."Day traders could be forgiven for feeling dazed and confused on Monday (for once, it may not have been due to overindulging in their favorite "commodity"). Shares of Tilray, Cronos and other pot stocks fluctuated between gains and losses - while shares of Aphria, another large Canadian pot stock plunged - following two scathing presentations from short sellers during a conference in New York City organized by famed short seller Whitney Tilson."
https://www.zerohedge.com/news/2018-12-03/pot-stocks-tanks-after-analyst-accuses-aphria-playing-elaborate-shell-game