Oil extended declines as Russia ruled out cooperation with OPEC to cut production, fueling speculation the global glut will persist. Futures slid as much as 4.2 percent in New York from Friday’s close. Russia won’t do a deal with Saudi Arabia, the biggest member of the Organization of Petroleum Exporting Countries, to cut output, OAO Rosneft Chief Executive Officer Igor Sechin said, according to the Financial Times. Sanctions on Iran’s oil exports will probably be lifted within the first three months of 2016, according to four western diplomats familiar with the nuclear monitoring process. Oil has slumped more than 25 percent since this year’s closing peak in June amid signs the global glut that drove prices to a six-year low will be prolonged. Iran has signaled it will boost output once sanctions are removed as the nation seeks to regain market share. U.S. crude stockpiles remain about 100 million […]