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Meta's Muse tops App Store, sparking chip rally that pushes AMD past $1T

Investors are betting autonomous agents burn through CPU cycles, not just GPU power, reshaping the AI chip trade.

• Meta's Muse agent hit No.1 on the US App Store just 13 days after its Sept 8 launch, sending Meta shares up 11% and AMD, Intel and Arm shares double digits on Sept 21, 2026.
• Muse is a free personal AI agent that drafts emails, books travel and shops online inside a dedicated secure virtual machine, competing with OpenAI and Anthropic's enterprise-focused agents.
• Muse logged roughly 730,000 downloads in its first 10 days and topped 2.5 million by day 13, outpacing Anthropic's Claude and xAI's Grok but trailing ChatGPT's 3.1 million.
• AMD's market cap crossed $1 trillion for the first time as it jumped roughly 9-10%, while Intel rose about 12% and Arm surged around 16-17% in the same session.
• Arm's AGI CPU, co-developed with Meta as lead partner for agentic AI infrastructure, is built for workloads that can need roughly four times the CPU cores per gigawatt of older AI setups.
• Wells Fargo raised its Meta price target to $796 from $640, and Evercore ISI called Muse proof that Meta's $200 billion AI investment 'was not in vain.'
• Muse's breakout suggests personal AI agents could be the first mass-market catalyst shifting AI infrastructure spending from GPU-heavy training toward CPU-heavy inference and orchestration.