Meta's stock, recently trading near $728 after a 25-36% September rally driven by the early September launch of its Muse personal AI agent, reflects trader focus on monetization potential from the popular chatbot and new enterprise AI platform announced September 28. Heavy 2026 capex guidance of $130-145 billion for AI infrastructure, alongside strong ad revenue growth, supports the bullish shift, though free cash flow remains pressured and Q3 earnings on October 28 represent the next major test. Competitive pressure from rivals like OpenAI's agent releases and valuation multiples near the upper end of historical ranges introduce uncertainty for the coming week, with sentiment hinging on sustained user adoption metrics and any pre-earnings momentum.