Tuesday's ETF Movers: XBI, ITB

In trading on Tuesday, the SPDR S&P Biotech ETF (XBI) is outperforming other ETFs, up about 2.6% on the day. Components of that ETF showing particular strength include shares of Sarepta Therapeutics (SRPT), up about 13.1% and shares of Puma Biotechnology (PBYI), up about 9.7% on the day.