The weighted-average dollar rate did not change during the morning trading session for US currency and remained at the level of RUR31.88 per dollar. Commercial bank experts linked the stability of the dollar rate at the Unified Trading Session to resistance shown by the Central Bank. Some experts remarked on this fact in an interview with RBC. They underlined that the volume of dollar sales by the Central Bank had been quite substantial. The experts estimated the volume of the Central Bank's currency intervention during today's special session at $40m-50m. The total trade volume reached $135m at the Unified Trading Session. Therefore, deals by the Central Bank made up about one third of the total amount of deals.