South Korean stocks opened lower Tuesday, with the KOSPI falling 13.31 points, or 0.19%, to 6,876.43 by 9:15 a.m. Seoul time. The decline followed losses on Wall Street, where renewed tensions between the United States and Iran pushed crude oil prices higher and raised concerns that increased energy costs could keep inflation and interest rates elevated. U.S. Treasury yields continued climbing, while major Korean stocks traded mixed. The won strengthened slightly against the U.S. dollar.