Pinterest shares up 17.6% after forecasting first-quarter revenue above market estimates, betting on the image-sharing platform's artificial intelligence-powered advertising tools to boost ad spend.

The forecast followed better-than-expected record monthly active users and revenue during the fourth quarter, thanks to a robust holiday shopping season.

Advertisers turn to Pinterest for its AI-driven ad tools such as Performance+ suite, designed to help advertisers better target users with automation features.

"Our strategy is paying off. People are coming to Pinterest more often, the platform has never been more actionable," CEO Bill Ready said in a statement.

Rising Gen Z users and new shoppable content have made the platform more lucrative for marketers.

Shares of Affirm were rising 20.7% after the "buy now, pay later" company easily beat quarterly estimates.

For its second fiscal quarter, the company reported earnings of 23 cents a share, beating Wall Street's call for a loss of 16 cents, according to FactSet. Revenue of $866 million was above the consensus estimate for $807 million. In the quarter a year ago, Affirm reported a loss of 54 cents per share and revenue of $591 million.

Gross merchandise volume -- which measures transactions on Affirm's platform -- was $10.1 billion, higher than analysts' forecast of $9.64 billion. A year ago, gross merchandise volume was $7.5 billion.

Cloudflare's stock surged 15.36% on expectations of improving sales efficiency, AI tailwinds, and strong customer acquisition, positioning it for further growth in 2025.

Needham reiterated its Buy rating and raised its price target to $185 from $160, highlighting Cloudflare's record number of paying customers and continued growth in $1 million+ new customer additions. The firm also noted improving sales representative productivity and expects a revenue boost in the second half of 2025.

Morgan Stanley maintained its Overweight rating, increasing the price target to $154 from $140. Analysts cited strong Q4 results and a 2025 outlook that signals accelerating topline growth, aided by Edge AI expansion. They see a potential bull case of $200 if revenue growth surpasses 30% by year-end.