The trade volume at today's special session on US currency amounted to almost $493m. This has been the highest figure since February 21. It has almost doubled, compared to yesterday's trade volume at the UTS. Dealers of commercial banks attribute this considerable activity of UTS participants to the massive supply of export currency revenues, which might have been promoted by a restart in the growth in world oil prices and the end-of-month factor. Although balances at correspondent accounts increased at the beginning of business today, market participants seemed to decide to sell currency to avoid a possible emergence of a ruble deficit, experts believe.