Why did META move on Jul 9, 2026?

Meta's stock moved following the company's announcement of Muse Spark 1.1, a new multimodal reasoning model built for agentic and coding tasks [1, 11]. This launch marks the first time Meta is offering a paid AI developer model, accessible via a new Meta Model API [3, 6, 14]. Investors reacted to CEO Mark Zuckerberg's aggressive pricing strategy to undercut competitors [5, 9] and his claims that the updated model outperforms Google's Gemini tools [8, 14].