Cassava Sciences shares are plunging in premarket trading and are losing most of their value after the biotech firm said its experimental Simufilam drug aimed at treating Alzheimer’s disease failed to ...
Cassava Sciences said a study of its Alzheimer's treatment simufilam didn't meet co-primary, secondary and exploratory biomarker endpoints. Trading was halted at 7:25 a.m. ET and resumed trading at 8 ...