Meta Shares Jump More Than 11% as Muse AI Agent Reaches No. 1 on App Store

Meta shares rose more than 11% on Monday, September 21, 2026, after Muse, the company’s new personal AI agent, climbed to the top of Apple’s U.S. App Store and gave investors an early signal of consumer demand for agents that can act, not just answer. The rally was amplified by a Wells Fargo price-target increase and arrives two days before Meta Connect, a September 23-24 developer event focused on AI, AI glasses and VR.