Viktor Zubkov and Vladimir Putin are both being reported as likely to succeed Dmitry Medvedev’s role as chairman of Gazprom, a company “regularly referred to as Kremlin Inc.” ArcelorMittal, the world’s biggest steelmaker, has agreed to buy three coal mines in Russia for $720 million from OAO Severstal. Russian stocks led by Rosneft, LUKoil and Tatneft fell on renewed concern that a recession in the United States will hurt global demand for oil and gas, the country’s biggest exports.