How To Be Entrepreneur on Instagram: "Sydney Sweeney Moved the Market Literally. American Eagle dropped a bold new “Great Jeans” campaign starring Sydney Sweeney and the internet exploded. But this wasn't just a viral moment. It was a financial earthquake. Within 24 hours: Stock price surged 17% Market value jumped $400 million American Eagle rejoined the $2 billion club All from one ad. Dressed in head-to-toe denim, Sweeney didn't just sell jeans she turned brand buzz into shareholder returns.