Oil prices jumped more than four percent Monday after another flare-up between the United States and Iran that threatened their already fragile truce, while Seoul led losses in most Asian stock markets as tech firms suffered another selloff.

Oil prices climbed Monday as Iran expanded strikes on Gulf states. U.S. West Texas Intermediate crude rose and Brent crude futures climbed. Tehran extended strikes on Qatar and…

World oil prices surged Monday as a fresh flare-up between the United States and Iran rattled investors, while a selloff in chipmakers sent South Korea's stock market plunging.