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 ...

Supermicro shares gained ground in premarket trading on Monday after rising nearly 80% last week, as the embattled server ...

Macy's shares moved lower Monday morning after the retailer unexpectedly posted preliminary results for the third quarter, and said its official report for the quarter would be delayed following an ...