DEEPSEEK'S LEANER MODEL RATTLES KOREAN CHIPMAKERS

South Korea's Kospi slid on Monday after DeepSeek said its new V4.1-Flash model needs only a quarter of the high-bandwidth memory its predecessor required, undercutting the AI memory-chip demand story that has driven Samsung and SK Hynix shares this year. SK Hynix, the bigger supplier of that memory, dropped 2.8%, more than triple Samsung Electronics's ($SSNLF) 0.8% decline. The gap shows how much of South Korea's chip trade now rides on HBM demand holding up.