-- Health care stocks declined Thursday afternoon, with the NYSE Health Care Index decreasing 0.5% and the State Street Health Care Select Sector SPDR ETF (XLV) shedding 0.7%.
The iShares Biotechnology ETF (IBB) fell 1.9%.
In corporate news, Thermo Fisher Scientific (TMO) raised its full-year outlook on Thursday as Q1 results came in stronger than expected, even as organic growth fell short of analysts' estimates. Its shares fell 10.9%.