South Korea's benchmark Kospi index surged over 5% in early trading on Thursday, extending a rebound after a tech-driven selloff rattled markets around the world earlier this week. The rally was led by heavyweight chipmakers Samsung Electronics and SK Hynix, as investors returned to battered semiconductor stocks after two days of volatility. Samsung Electronics shares gained over 6%, while SK Hynix jumped nearly 10%. The gains came after SK Hynix filed for a blockbuster Nasdaq listing that