OAO Rosneft, the Russian state-run oil company targeted by international sanctions, headed for a fourth monthly decline before it reports what analysts estimate will be the first drop in dollar revenue since 2009. The stock fell 0.8 percent to $5.37 in London , pushing this month’s retreat to 7.9 percent. The ruble weakened 0.8 percent to 42.28 per dollar, extending a three-month drop to 17 percent, the biggest among emerging-market currencies. Oil touched a 28-month low in New York . Rosneft’s third-quarter earnings report today will show a 12 percent drop in dollar revenue from a year earlier, according to the average of 11 analyst estimates compiled by Bloomberg. “The stock is under enormous pressure, and if we see the ruble continue to plunge and the sanctions continue to squeeze the economy, this pressure will deepen,” Sergei Pigarev, an analyst at Rye, Man & Gor Securities in Moscow, said […]