Russia's main financial regulator unexpectedly increased its key rate half a percent from 7.5 to 8 percent on Friday, saying that even in the present situation of slowing economic growth, quelling inflation is its main priority. “Inflation risks have risen, connected, among other things, with the increased political tension and with its possible impact on the dynamics of the national currency rate, as well as with the changes in tax and tariff policies that are being discussed,” the Central Bank said in a statement on its website.