One-day ruble credit rates amounted to about 40-50 per cent on the Russian interbank currency market this morning, a banking expert reported in an interview with RBC. He noted that these credit rates were actually five times higher because today's transactions would be implemented only in five days. However, the specialist thinks that ruble assets may become cheaper later today. He recalled that ruble credit rates dropped from 70-60 per cent at the beginning of trading yesterday to 15 per cent by the end of the previous day. Meanwhile, record high ruble rates do not prevent a rise in the dollar rate. As of 11 a.m. the dollar cost 30.52-30.55 rubles on the interbank market, which is about 0.4 rubles more than the official exchange rate.