News About Muse Drove a 1-Day 11% Jump in Meta Stock. But the AI Agent Could Be Even More Valuable Than the Market Is Giving It Credit For. Meta Platforms (META +3.45%) released its Muse AI agent about two weeks ago, and it appears to have another hit on its hands. The Muse app has climbed to the top of the app store charts in recent days ... Published: 2026-09-23