Oil firms including Exxon Mobil XOM.N and Chevron Corp CVX.N edged up as Brent crude LCOc1 hit a near three-year high on energy crunch fears. Higher oil prices and supply chain disruptions have set off alarm bells for businesses and consumers ahead of the third-quarter reporting season that begins on Wednesday with JPMorgan Chase & Co JPM.N. "Market participants could stay concerned over high energy prices translating into further acceleration in inflation, and thereby faster tightening by major central banks," said Charalambos Pissouros, head of research at JFD Group.