MINSK — The Belarussian ruble lost more than a third of its value against the dollar Wednesday after the central bank introduced a free floating exchange rate for trade between banks. The currency soared to 4,800 to 5,300 rubles per dollar on the interbank market, bankers said. This compares with the official exchange rate of 3,074 rubles per dollar. While the freeing up of the interbank rate makes foreign trade […]