Healthcare stocks were higher late Wednesday afternoon, with the NYSE Healthcare Index up 0.1% and the State Street Health Care Select Sector SPDR ETF (XLV) adding 0.3%.
The iShares Biotechnology ETF (IBB) rose 0.5%.
In corporate news, Merck (MRK) shares rose 2.6% after Daiwa upgraded the stock to outperform from neutral and raised its price target to $143 per share from $120.