Biotech stocks off on Thursday

Biotech indices dipped Thursday, as the BioCentury 100 lost 351.02 (4%) to 7562.21, while the NASDAQ Biotechnology Index shed 159.73 (4%) to 3887.75. The NASDAQ was off 83.50 (2%) to 5,056.44, while the Dow Jones Industrial Average slipped 120.72 (1%) to 17,419.75.

Decliners outnumbered gainers 95-4 in the BioCentury 100. Sustaining the heaviest losses were gene editing company Sangamo BioSciences Inc. (NASDAQ:SGMO), off $1.65 (18%) to $7.59; endocrine and diagostics play Opko Health Inc. (NYSE:OPK), which lost $2.21 (14%) to $13.90; and oncology company MacroGenics Inc. (NASDAQ:MGNX), which shed $4.76 (13%) to $33.12. ...