Biotechs getting roughed up; IBB down 2.4%

• Biotech investors are sitting on the sell button today. The iShares Nasdaq Biotechnology ETF (IBB -2.4%) is down on increased volume. Shares have retraced over 5% since the recent close of 300 on September 22.
• Alnylam (ALNY -48%) is leading the rout after it announced that it was dropping development of RNAi candidate revusiran.
• Representative tickers: (AMGN -0.3%)(BIIB -1.3%)(GILD -1.9%)(CELG -1.4%)(BMY)(MRK -0.7%)(PFE -1.2%)(VRTX -3%)(ALXN -2.2%)