AMD rose about 10% on September 21 2026 to a record, taking its market capitalisation above $1 trillion for the first time, as chip stocks rallied on Meta's launch of its Muse AI agent, which went to the top of the App Store's free charts. The move was framed as a repricing toward agentic AI workloads that run continuously on CPUs - Citi raised its 2030 global CPU market forecast to $237B - and was helped by the AI executives invited to the Trump-Xi state dinner. The Nasdaq-100 gained 2.8% on the session.