Morning Market Losers By: Benzinga via Benzinga March 20, 2014 at 09:46 AM EDT Agenus (NASDAQ: AGEN) shares declined 15.12% to $3.65 after the company reported that GlaxoSmithKline's (NYSE: GSK) MAGRITi study did ... Read More >> Related Stocks: Agenus Inc Boxx One Year Target Duration ETF GUESS Gsk Plc ADR