In trading on Wednesday, the iShares Nasdaq Biotechnology ETF ( IBB ) is outperforming other ETFs, up about 1.7% on the day. Components of that ETF showing particular strength include shares of Intermune ( ITMN ), up about 8.2% and shares of Insys Therapeutics ( INSY ), up about 7.3% on the day.
And underperforming other ETFs today is the SPDR S&P Retail ETF ( XRT ), down about 0.5% in Wednesday afternoon trading. Among components of that ETF with the weakest showing on Wednesday were shares of Aeropostale ( ARO ), lower by about 6.5%, and shares of Macys (M), lower by about 5.6% on the day.
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