Meta Platforms Inc. logged a 36 percent gain in September, its strongest monthly return since July 2013, driven by rapid adoption of its Muse personal AI assistant. The rally has positioned the company within one percentage point of a $2 trillion market capitalization.
The surge reverses a year-long stretch of investor skepticism. Through Aug. 18, Meta's shares had fallen 18 percent year-to-date, ranking among the 50 worst performers in the S&P 500. Concerns centered on whether the company's massive AI spending would deliver returns.
Muse's quick ascent to the top of app charts has shifted that calculus. Rob Biederman, co-founder and managing partner at Asymmetric Capital Partners, said the product "clearly validates its AI strategy and position, after a year and a half where the stock was basically flat because people didn't know if AI was going to be a net positive or a net negative." Biederman added that AI agents are expected to become a primary interface for internet access, concentrating power among platforms that control them.
Two catalysts drove the September move. Meta agreed late in August to pay as much as $18 billion to resolve social-media litigation, removing a major overhang. But the dominant driver has been enthusiasm for new AI products and anticipated revenue growth beyond advertising.
On Wednesday, Meta unveiled a palm-sized device for Muse and camera-free versions of its smart-glasses line. The company also announced a grocery partnership with Maplebear Inc. Instacart's parent, and a collaboration with online travel agency Expedia Inc.
JPMorgan analyst Doug Anmuth upgraded Meta to overweight from neutral on Sept. 10, citing "meaningful upside potential as Meta is in the early stages of releasing frontier models and AI-driven products beyond advertising."
Meta traded at $756.67, down 2.7 percent on the day, suggesting profit-taking despite the monthly rally. Sustained execution on AI-driven revenue streams beyond advertising remains key to validating the current valuation.
