MOSCOW, September 19 (Itar-Tass) - - The US dollar's average weighted rate against the Russian rouble in "tomorrow" deals went down by 1.61 kopecks to stand at 30.8634 roubles per the U.S. dollar in Wednesday’s unified trading session on the Moscow Interbank Currency Exchange (MICEX) as of 11.30 Moscow time, MICEX said.

The official exchange rate of the U.S. dollar against the Russian rouble established by the Central Bank of Russia on Tuesday, September 18, amounted to 30.8795 roubles per the U.S. dollar.