Friday's ETF Movers: XBI, PIZ

In trading on Friday, the SPDR S&P Biotech ETF (XBI) is outperforming other ETFs, up about 1% on the day.  Components of that ETF showing particular strength include shares of United Therapeutics (UTHR), up about 15.9% and shares of Arrowhead Research (ARWR), up about 4.5% on the day.