Rosneft showed the largest increase in May, raising output 0.7 percent. Russia’s oil output edged up 0.2 percent to 10.26 million barrels per day in May, matching a post-Soviet record seen in October, as companies including Rosneft ramp up production on the back of high crude prices. Rosneft, the country’s top crude producer and responsible for more than a fifth of the country’s oil output, led […]