Healthcare stocks were mixed Wednesday afternoon, with the NYSE Healthcare Index fractionally higher and the State Street Health Care Select Sector SPDR ETF (XLV) easing 0.1%.
The iShares Biotechnology ETF (IBB) fell 1.1%.
In corporate news, Boston Scientific (BSX) lowered its full-year guidance below Wall Street's estimates on Wednesday, citing factors including weak demand for its Watchman heart implant. Its shares were up 0.2%.