OREANDA-NEWS  There is no great potential for strengthening or weakening the ruble now, the fundamental dollar exchange rate is about 90 rubles, said the head of Sberbank, German Gref, during a press conference at Investor Day.

"There is a fundamental story. At the moment, the fundamental value of the ruble is about 90 rubles per dollar, give or take. You can never predict, we have a market exchange rate of the ruble. To be honest, we don't see much potential for strengthening, but we don't see much potential for the ruble to weaken in any way," he said.