The Russian ruble slumped to a more than 15-month low against the dollar on June 30, weighed down by domestic political risk concerns after an aborted armed mutiny over the weekend and lacking support drivers. "The ruble continues to crumble," Alor Broker said in a note. Capital controls have helped insulate the ruble against geopolitics since Russia invaded Ukraine, but mercenary leader Yevgeny Prigozhin's aborted march toward Moscow reverberated through markets and left questions over President Vladimir Putin's grip on power. To see the original story by Reuters, click here.