FinanceRosneft in red for first half as output drops and Covid-19 hit top lineRevenues slump a third in first six months of the year at Russian oil giantDrilling in progess: Russian oil producer Rosneft has upped development drilling at the Kondinskoye oilfield, part of the Erginsky cluster of deposits in West Siberia, in anticipation for lifting of Opec-related output restrictionsPhoto: INFORMUGRA.RUVladimir AfanasievMoscow