Ukrainian gas monopoly Naftogaz said Monday it is suing Russia in the Stockholm arbitration court to get a fair price for the natural gas it receives and to recoup $6 billion in what Kiev said was overpayment for gas deliveries over the past four years. After Moscow and Kiev failed to resolve a long-running dispute over Russian gas supplies to Ukraine, Russian gas giant Gazprom said Monday it would only ship fuel to Ukraine if it pays in advance. Naftogaz said in a statement it had filed a claim in the Stockholm court demanding a “fair and market price” for the gas that Gazprom ships to Ukraine. Kiev had been asking for a gas price of $268.5 per 1,000 cubic meters, the level that was agreed in late 2013 between Russian President Vladimir Putin and his ousted Ukrainian counterpart Viktor Yanukovych. On Friday, Kiev said it was ready to […]