The following is the second summary of major stories moved by Yonhap News Agency on Wednes... ■ (2nd LD) Seoul shares soar over 6 pct on revived AI optimism, SK hynix earnings. SEOUL -- Seoul shares surged by more than 6 percent Wednesday, led by a rally in chipmakers after SK hynix reported record quarterly earnings and announced additional shareholder returns. The Korean won weakened against the U.S.