The average-weighted dollar exchange rate in the first half of thismorning's session on US currency amounted to 31.57 RUR/USD, which wasRUR0.01 lower than the previous rate. Experts of commercial banks attributethis strengthening of the ruble to the worsened situation with rubleliquidity, which led to an advance in ruble credit rates. According to the experts, the one-day ruble credit rate was from fiveto seven percent in the morning. Meanwhile, the overnight credit rate didnot exceed three percent yesterday afternoon. So ruble credit rates havealmost doubled today, compared to yesterday's figures..