Why is Samsung Electronics stock rising today?

Samsung Electronics shares surged 2.7% to ₩281,250 on Tuesday as Wall Street's AI rally drove up semiconductor companies from South Korea. The Nasdaq Composite broke its all-time high on the day, buoyed by optimism around Meta's Muse AI agent, which ignited bets on AI-driven demand for chips and computing power. Samsung's prospects improved through multiple catalysts, including a significant jump in HBM4 production yield to around 80% from below 60%.

This enabled increased supply and boosted profitability, with Q3 HBM4 revenue expected to grow more than threefold compared to the previous quarter. Additionally, South Korea's semiconductor exports hit a record high in the first 20 days of September, with year-over-year growth of 259%. Samsung and rival SK Hynix contributed to a 1.7% rally in the KOSPI index.