Thursday's ETF Movers: XBI, GDX

In trading on Thursday, the XBI: SPDR S&P Biotech ETF, US Equities (XBI) is outperforming other ETFs, up about 1.6% on the day. Components of that ETF showing particular strength include shares of Acorda Therapeutics (ACOR), up about 12.7% and shares of Alnylam Pharmaceuticals (ALNY), up about 9.8% on the day.