Today's biggest winners and losers in the stock market, a look at the notable movers:
On this episode of Stock Movers:

- Advanced Micro Devices (AMD) gave a revenue forecast that exceeded analysts’ estimates, indicating that demand for data center processors remains strong. The company's fourth-quarter revenue will be $17 billion, plus or minus 3%, compared with an average analyst estimate of $16.3 billion. AMD's data center growth has helped offset a slump in the personal computer market, where rising memory-chip costs have slowed production and depressed user demand. AMD shares gained about 6% in late trading after the report was released.

- Duolingo (DUOL) raised its outlook after investments in customer acquisition and subscription tier changes boosted the number of daily active users. The company expects 2026 bookings of about $1.3 billion and upgraded its guidance for revenue and adjusted earnings before interest, taxes, depreciation and amortization for the year. Duolingo saw daily active user growth of 29% over the third quarter and expects a similar growth rate in the fourth quarter, according to Chief Financial Officer Gillian Munson.

- Block's (XYZ) third-quarter gross profit was up 22% to $3.2 billion, compared with the average analyst estimate of $3.1 billion. Block now expects $12.6 billion in gross profit for 2026, according to a shareholder letter by founder Jack Dorsey, up from an earlier outlook of $12.5 billion. The company's stock traded at around $76 Tuesday, after surging following a revamp announcement in February, but remaining well short of its $289 record high reached in 2021.