Sterne Agee Upgrades Aetna To Buy By: Benzinga via Benzinga March 19, 2015 at 09:29 AM EDT Sterne Agee upgraded Aetna Inc. (NYSE: AET) from Neutral to Buy. Aetna shares have gained 42.57% over the past 52 weeks, while the ... Read More >> Related Stocks: Aetna