Asian stocks were mixed on Tuesday after last week's tech-led volatility, with South Korea's Kospi swinging between gains and losses while oil prices rose around one percent. The Kospi fluctuated after falling roughly 17 percent over three days last week, then soaring nearly 18 percent on Friday and falling again Monday, with chip giants SK hynix and Samsung in focus. Sydney, Singapore, Wellington, Taipei, Jakarta and Manila rose, while Tokyo, Hong Kong and Shanghai dipped. Oil prices edged up after plunging five percent on Monday, as US President Donald Trump said negotiations with Iran were ongoing despite Tehran's denials, with talks focused on reopening the Strait of Hormuz. The yen weakened against the dollar after Friday's rally sparked by a historic joint intervention by Japanese and US authorities.