VIVUS' (NASDAQ:VVUS) stock was down 25% for November, though still up 15% for the year. Its drug Qsymia is the first obesity drug to be approved and reach the market in more than a decade, but its sales are lagging. Because only 20% of patients are able to get the drug covered by insurance, there is currently a 30% abandonment rate of patients who decide they can't afford to keep taking it. The stock did rally a bit at the end of the month when Aetna announced that it would begin covering Qsymia and Arena's (NASDAQ:ARNA) Belviq in the same space, so investors are optimistic that as insurance coverage widens, sales will improve.

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