Biotechs Struggling To Find A Bottom By: Benzinga via Benzinga April 08, 2014 at 10:24 AM EDT The great biotechnology sell-off of 2014 began on February 26 and started as big sell-offs often do: quietly. The SPDR S&P ... Read More >> Related Stocks: Biogen Idec Celgene Corp Gilead Sciences Halozyme Therapeutic Merck & Co Pfizer Regeneron Pharmaceuticals S&P Biotech SPDR