Top oil exporter Saudi Arabia may raise the official selling price (OSP) for flagship Arab Light crude in May after Middle East benchmarks strengthened last month, industry sources said. The May OSP for Arab Light crude could rise by 20 to 30 cents a barrel from April, according to a Reuters survey of five refining sources. The expectation of higher prices comes after the backwardation structure in the Dubai benchmark narrowed by 33 cents a barrel in March versus February, Reuters data showed. When the market is in backwardation, prompt prices are higher than those in future months, implying tight supply. The May OSP ... (full story)