AstraZeneca
Don't let this evil temptress fool you with its impressive dividend yield of 7.6% -- it's the devil in disguise.
AstraZeneca is facing the possibility of losing five of its largest revenue producers in a five-year period. The company already lost Arimidex last year and is facing the loss of exclusivity rights to its schizophrenia drug Seroquel this year. Next year is when the real pain would begin, with AstraZeneca's asthma treatment Symbicort coming off patent, followed by Iressa in 2013 and the company's top-selling heartburn drug, Nexium, in 2014.
All told, four out of five of AstraZeneca's best-selling drugs are looking at a likely major influx of generic competition within the next four years. Arimidex is already facing competition from Teva's generic drug, known as Anastrozole, and sales have already taken a double-digit dive. More than $13 billion in annual sales is at risk from patent expirations. That's a serious red flag for shareholders.
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