-- Health care stocks were mixed late Thursday afternoon, with the NYSE Health Care Index adding 0.1% and the State Street Health Care Select Sector SPDR ETF (XLV) easing 0.1%.
The iShares Biotechnology ETF (IBB) increased 0.2%.
In corporate news, STAAR Surgical (STAA) needs to show that the rebound in China is sustainable after the firm reported much higher preliminary Q1 net sales than consensus, Wedbush said in a note. Wedbush raised the company's price target to $26 from $21, while keeping its neutral rating. STAAR shares jumped 23%.