In Dec. 2019, CEO Gordon Johnson of Chicago-based investment firm GLJ Research issued a price target of $0 on Aurora Cannabis ( ACB 1.13% ), the most popular pot stock in the world. According to Johnson's note to clients, Aurora is facing a cash crunch to which it has no answers. Despite having access to $400 million in at-the-market financing (i.e., a fancy way of saying that Aurora Cannabis can sell up to $400 million worth of its stock to raise cash), Johnson expects a number of restrictions on the company's credit facility with the Bank of Montreal to kick in.