American Eagle Outfitters (AEO) shares soared on Monday, posting their largest single-day gain in nearly 25 years, after former U.S. President Donald Trump praised the company’s new advertising campaign starring actress Sydney Sweeney.

In a post on his social media platform Truth Social, Trump described the ad as “the HOTTEST out there” and credited Sweeney — a self-identified Republican — with helping jeans “fly off the shelves.” The endorsement, though unexpected, sent the stock up more than 20% by the market close, with some reports citing intraday gains as high as 24%.

“Sydney Sweeney, a registered Republican, has the HOTTEST ad out there. It’s for American Eagle, and the jeans are flying off the shelves. Go get ’em Sydney!” Trump wrote.

A Viral Campaign Meets Political Spotlight

The campaign, launched in late July, features Sweeney in a series of nostalgic, Americana-themed images promoting American Eagle’s denim line. Initially designed as a standard back-to-school marketing push, the ads gained sudden political attention after Trump’s post went viral.

Within hours, hashtags like #SydneySweeney and #AmericanEagle trended on X (formerly Twitter) and TikTok, sparking both praise and criticism. Supporters celebrated the brand’s association with Sweeney, while critics accused the campaign of reinforcing traditional — and exclusionary — beauty standards.

Market Reaction

American Eagle shares closed around $13.28, up from just over $11 the previous trading day, marking the steepest rally since August 2000. Trading volume was several times higher than average, a sign that the surge was driven by a mix of retail investor enthusiasm and short-term momentum traders.

Analysts were quick to note the role of “meme-stock” dynamics, in which a viral event or celebrity endorsement can trigger rapid buying, often disconnected from a company’s underlying financial health.

“This is a perfect example of how politics, pop culture, and finance collide in 2025,” said Jessica Tan, a retail sector analyst at Brighton Capital. “Whether this translates to actual sales will be the real test.”

American Eagle’s Financial Context

Before Monday’s rally, American Eagle had been facing a challenging year. The company recently posted weaker-than-expected earnings, citing declining revenue, increased markdowns, and an operating loss in the latest quarter. Management had also lowered full-year guidance, reflecting cautious expectations for the retail environment.

That made the sudden surge in share price all the more striking — and, to some market observers, potentially unstable.

Brand’s Response

American Eagle has not publicly commented on Trump’s remarks. In previous statements about the campaign, the company said it chose Sweeney as “an icon of confidence and self-expression” to appeal to a younger, fashion-conscious audience ahead of the back-to-school shopping season.

Sweeney herself has remained silent on Trump’s endorsement. In past interviews, she has spoken about her political beliefs and her focus on her acting career, but has not addressed the specific cultural debates around the ad.

Cultural & Commercial Impact

The incident highlights the increasingly blurred lines between marketing, politics, and finance. A single social media post from a high-profile figure can now send shockwaves through the stock market, regardless of a brand’s prior performance.

While some see this as a triumph of modern branding — proof that cultural relevance can instantly translate to market value — others caution that such surges are often fleeting.

“If the hype fades without a sustained bump in sales, the stock could quickly return to pre-rally levels,” Tan warned.

For now, American Eagle’s marketing team may be celebrating both the attention and the unexpected lift in investor confidence. Whether the sales numbers in the coming weeks justify the buzz will determine if this is a long-term win or just a momentary flash in the retail spotlight.