US stock earnings: Fintech company Block (formerly SQ) released its earnings report after hours. Q4 performance was mediocre, and the mobile Cash App GPV couldn't stop its downward trend. However, the company announced it will cut 50% of its workforce while leveraging AI technology to improve efficiency and reduce costs, thus raising its 2026 performance guidance. Shares surged 25% after hours. This is the first time a popular tech company has openly announced massive layoffs due to AI, dragging down today's strong rebound in software stocks.