Cempra (CEMP -7.9%) bulls among analysts just lost one of their own. Cowen and Company's Ritu Baral just downgraded the stock to Market Perform citing the lack of clarity with lead product candidate solithromycin.
Since the close 7-6 Ad Comm vote several weeks ago, there have been a rash of downgrades. According to MarketBeat, there are three Buy ratings on the stock and eight Hold/Underweight ratings. Before the Ad Comm, 10 of 11 analysts rated the stock a Buy.