S & P downgrades Rosneft,Lukoil,Transneft,Gazprom and Russian Railways

The international rating agency S & P downgraded its estimates on the Russian Railways and the four major players in the Russian oil and gas sector from stable to negative, according to a press release from the agency .

The rating action, in addition to the Russian Railways, affected "Rosneft", "Transneft", LUKOIL and "Gazprom"...