Why is Fastly stock surging today?

Fastly stock experienced a significant surge of 16.2% during afternoon trading, as a viral social media post highlighted the cloud company’s growing presence in Meta’s Muse AI assistant ecosystem. The revelation, shared by an X account named Odd Diligence, showcased Fastly's substantial role in AI traffic routing, handling 29.3% of Meta Muse AI traffic.

This finding came after a wave of analyst activity following Fastly's Investor Day in New York City on September 22, when Evercore ISI upgraded the company to an Outperform rating with a $32 price target, and Raymond James followed suit with a $29 target. Seeking Alpha also raised its price target to $34, emphasizing Fastly's AI-focused product suite, including AI Runtime Control, AI Firewall, and API Enforcement.

Options traders were particularly active, with call volume nearly 187% higher than its daily average. Despite a broader market decline with the S&P 500 dropping 0.7% and the Nasdaq falling 1.1%, Fastly's stock rallied due to company-specific factors rather than sector or macro support. The stock opened at $25.90 and briefly fell to $24.04, reflecting early profit-taking after a stellar year-to-date performance, before rallying strongly in the afternoon.

By the session's end, Fastly's shares reached a high of $31.33, marking one of the company's strongest single-day gains of the year.