Rouble swings to opaque trading territory after new US sanctions ReutersNew US sanctions force end of dollar and euro trading on Russia’s main exchange CNNChina The Winner In Putin-Biden Tussle? Moscow Exchange Halts Dollar, Euro Trade After US Sanctions Hindustan TimesRussians Line Up To Buy US Dollars As Ruble Plummets After New Sanctions NewsweekRussia financial system shaken after U.S. imposes new sanctions The Washington Post