Meta Platforms added roughly $190 billion in market value in a single session Monday after its new AI agent, Muse, reached the top of Apple’s U.S. App Store free download chart. The stock closed at $741, up about 11.4%. For a company that spent most of the summer selling off on capex concerns and a Q2 earnings miss, the reversal is striking.
Muse launched September 8. It is not a chatbot in the ChatGPT mold. The application lets users build customized agents that execute complex, multi-step tasks across the web: booking travel, sending emails, filling out forms, and making purchases. It runs on a dedicated virtual machine in Meta’s cloud and is powered by Muse Spark, the company’s latest model. Third-party app-ranking data shows Muse reached No. 1 in about 10 days.
The distribution advantage is real. According to third-party data from Apptopia, more than 95% of Muse users already use Facebook and 63% use Instagram. Meta can place Muse prompts inside products used by billions of people without the customer acquisition costs a standalone AI company would absorb. That structural edge is worth more than any individual download count.
Why Wall Street Is Paying Attention
Morgan Stanley estimates Muse could generate $1.3 billion in annual revenue by 2028 if user scale and commercial query targets are met. Paid tiers priced at $20 and $100 per month give Meta a direct subscription path on top of the advertising flywheel it already runs. Q2 revenue was $60.8 billion, up 28% year over year. Q3 guidance calls for $61 to $64 billion.
Connect 2026 opens Wednesday, September 23, at 4 p.m. Pacific from Meta’s Menlo Park campus. Three hardware products are expected: Luna, a camera-free AI glasses addressing privacy concerns that have followed the Ray-Ban Meta line; Artemis, a first consumer look at augmented-reality glasses; and Project Phoenix, a tethered headset built for holographic video calls. The developer sessions September 24 will detail what the SDK permits third parties to do with sensor data, which is the dividing line between accessory and platform.
What Could Go Wrong
The Q2 earnings report was genuinely complicated. Capital expenditures reached $31.1 billion in the quarter alone, and full-year 2026 capex guidance is $130 to $145 billion. Free cash flow collapsed to $784 million in Q2. Net income dropped year over year, reflecting the cost surge of the AI buildout. Meta paused buybacks in the first half of 2026 and issued about $24.9 billion in net new long-term debt in that period.
Amazon has already blocked Muse from accessing its store, citing unauthorized access concerns. That friction limits the agent’s utility for one of the largest shopping ecosystems in the world and signals platform conflicts could constrain adoption before the product reaches scale.
The Bottom Line
Meta at $741 carries a business spending at a scale with no precedent in its own history. Muse demonstrates the infrastructure investment is producing real consumer products. Connect 2026 this week is the next test: whether the hardware lineup is compelling enough to establish wearables as a genuine computing platform. If it is, the capex eventually makes sense. If the glasses land flat, the spending case gets harder to defend in a stock already up sharply in September.
