Meta Platforms (META) hit October 2025 highs as its Muse AI agent impresses audiences and investors alike. AMD Inc. (AMD) hit $1 trillion in market cap after it, Intel (INTC), and Arm (ARM) surged thanks to part to Meta's rally. Warner Bros. Discovery (WBD) and Paramount Skydance shares ran higher after Paramount reached a settlement in a lawsuit targeting the merger. Sam Vadas carries investors through Monday's green day on Wall Street.