The world's top palm-oil producer announced that it would ban exports of the commodity starting on Thursday, sending the prices of edible oils soaring. Indonesia accounts for about half of the world's supply of palm oil, the world's most widely used vegetable oil. Palm oil is used for cooking and for the production of thousands of consumer products, including biscuits, detergents, and lipsticks.In a video statement on Friday, Indonesian President Joko Widodo said the move was designed to bring down domestic palm-oil prices and ensure domestic food availability in the wake of global food inflation. "I will monitor and evaluate...