AI stocks are heading into the final trading stretch of 2025 with a familiar vibe: enormous ambition, enormous spending, and increasingly strategic moves that blur the line between “partnership,” “acqui-hire,” and “not-quite acquisition.” On December 26, 2025, the AI-stock story isn’t just about one ticker popping on a headline. It’s about the whole ecosystem—chips, memory, power, regulation, and geopolitics—tightening into a single giant trade where one constraint (say, high-bandwidth memory or electricity) can ricochet through Nvidia, the cloud giants, and even consumer electronics. Below is a full roundup of the major AI-stock headlines shaping today’s narrative, plus the themes investors