Markets in Europe gain while Asian shares swoon as the war with Iran widens and oil surges higher

European shares have opened higher after another day of sell-offs in Asia, where South Korea’s benchmark plunged more than 12%. Oil prices climbed more than 3% as the United States and Israel war with Iran entered its fifth day. U.S. futures were down 0.3%. On Tuesday, the S&P 500 finished with a…