Meta Stock Surges with AI Agent 'Muse'—A Path to 'Direct Earnings' Found for the Lagging AI Giant Meta's AI agent app 'Muse,' released in the U.S. on September 8, reached the top spot on the U.S. App Store and Google Play free charts as of September 21. Meta stock rose approximately 11.3% from the ... Published: 2026-09-26