london march 1 reuters  credit rating agency moodys warned on tuesday that russias move to ban the servicing of newlyissued foreigncurrency debt in the wake of stiff western sanctions had added to the likelihood of a sovereign downgrade moodys said moscows move to prohibit residents from transferring foreign currency abroad or servicing any foreigncurrencydenominated loans from tuesday onwards reflected an increasing lack of predictability in its decisions read more russias ban on servicing new foreigncurrency debt is credit negative moodys said in a report these developments will further increase adverse financial ramifications for the domestic economy and financial sector raising the likelihood of further negative credit implications in the coming days and weeks moodys put its baa3 russia rating on a downgrade review on friday in the wake of the countrys invasion of ukraine hours later sp global cut its equivalent investment grade russian rating to junk and immediately put it on another downgrade warning read more major steps such as sanctioning russias central bank to prevent it deploying its huge stockpile of currency reserve and banning its top banks from the international swift network have since followed raising fears of a possible default