-- Health care stocks were mixed late Wednesday afternoon with the NYSE Health Care Index down 0.1% and the State Street Health Care Select Sector SPDR ETF (XLV) adding 0.2%.
The iShares Biotechnology ETF (IBB) eased 0.1%.
In corporate news, Biogen (BIIB) shares rose 2.2% after UBS upgraded the biotechnology company's stock to buy from neutral and boosted its price target to $225 per share from $185.