Meta’s stock is enjoying its best month in 13 years thanks to the company’s hot new AI assistant

Meta Platforms is on track for its strongest monthly stock performance in 13 years, a rally investors are linking to the momentum behind Muse, the company's new AI assistant. The product's growing popularity has helped shift the narrative around Meta's heavy spending on artificial intelligence, which had previously weighed on sentiment as costs climbed without clear evidence of returns.

The market relevance here is less about any single product feature than about validation. When a consumer-facing AI tool gains traction, it offers investors a tangible signal that large research and infrastructure budgets can translate into engagement, and potentially into advertising or subscription revenue over time. For a company whose core business remains digital advertising, proving that AI can deepen user interaction matters for the longer-term growth story.

What to watch from here: whether Muse's adoption holds beyond the initial novelty phase, how Meta discloses any monetization or usage metrics in upcoming earnings, and whether the stock's sharp move invites scrutiny around valuation. Sustained gains typically depend on durable engagement rather than a single strong month.