Thursday's ETF Movers: XBI, GDXJ

In trading on Thursday, the SPDR S&P Biotech ETF (XBI) is outperforming other ETFs, up about 3.5% on the day.  Components of that ETF showing particular strength include shares of Sangamo Biosciences (SGMO), up about 9.9% and shares of AMAG Pharmaceuticals (AMAG), up about 9.4% on the day.