Asian shares have swooned, with South Korea's benchmark plunging more than 12%, 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 0.9% after dropping as much as 2.5% on concerns over the war's damage to the economy. The Dow Jones Industrial Average pared its loss to 0.8%, and the Nasdaq composite fell 1%. The moves showed how higher oil prices and how much they might worsen inflation are among the central fears for investors. More spikes for oil prices may grind down the global economy and sap corporate profits.