MOSCOW, April 5 - Standard & Poor's Ratings Services has revised its outlook on the Ukrainian capital city Kiev to negative from stable following its outlook revision on the sovereign, the agency said in a press release.

"The ratings reflect Kiev's relatively high foreign currency debt; limited fiscal flexibility, due to central government control of major revenues; and evolving interbudgetary relations," said Standard & Poor's credit analyst Boris Kopeykin. "The ratings are also constrained by significant infrastructure financing requirements and the need for further improvements in management sophistication and transparency," Kopeykin said.