Asian shares extend losses, Kospi sinks 10%, as the war with Iran widens and oil surges higher

Asian shares have swooned, with South Korea’s benchmark plunging 10%, after a global sell-off for stocks hit Wall Street. Oil prices climbed still higher. Worries over the widening war have hammered most world markets. U.S. futures were down 0.4%. On Tuesday, the S&P 500 finished with a loss of 0…