3 More Surges In Biotech Short Interest (AMGN, MDVN, PCYC) By: Benzinga via Benzinga May 29, 2014 at 08:20 AM EDT While Amgen (NASDAQ: AMGN) saw a sizable dip in short interest between the April 30 and May 15 settlement dates, short sellers piled on ... Read More >> Related Stocks: Amgen