Shares of Altria (NYSE:MO) jumped nearly 7% on Sept. 12 after executive VP and general counsel Murray Garnick discussed the cannabis market at the Barclays 2018 Consumer Staples Conference. Garnich stated that Altria was "exploring options" and "evaluating market opportunities." That news seemed to offset a negative development regarding Altria's e-cig business. The FDA issued a warning to tobacco companies, stating that it would pull their e-cigarettes from retail shelves if they didn't make more changes to curb teen use. [...]