A.I. and EVs led Tuesday's trading activity after hours. Kevin Green joins Marley Kayden and Sam Vadas to help explain what caused downside action in Arista Networks (ANET) and Supermicro (SMCI). George Tsilis later joins to explain why AMD Inc. (AMD) was volatile after posting its report. The one clear winner of the postmarket: Rivian (RIVN), which also shared a slew of new announcements.