FinanceExxonMobil and Oxy post gains, as Chevron and European majors see shares drop on day after global sell-offChevron down, while ExxonMobil and Occidental post gainsA trader on the floor of the New York Stock Exchange on Tuesday, 6 August 2024.Photo: AP/SCANPIXRobert StewartNorth America Energy CorrespondentBaton Rouge