The rouble strengthened past 91 to the dollar on Tuesday, heading back towards levels reached in late December as trading resumed in full after Russia’s long January holidays. At 0729 GMT, the rouble was 0.5% stronger against the dollar at 90.67 and had gained 0.8% to trade at 99.24 versus the euro. It had firmed 0.7% against the yuan to 12.63.
