SK Hynix shares rose more than 12 percent in Seoul trading after the company accelerated its 40 trillion won share repurchase and cancellation program and pledged to return over 50 percent of cumulative free cash flow from 2025 to 2027 to shareholders. The firm separately plans 54 trillion won in new memory chip plants. Broader Asian tech stocks and U.S. equities also advanced while longer Treasury yields eased.