MOSCOW, May 17. /TASS/. The ruble has started weakening against the dollar and the euro during foreign currency trading on Moscow Exchange on Tuesday according to trading data.

As of 10:20 am Moscow time, the dollar exchange rate was up by 0.34% at 63.61 rubles, while the euro exchange rate was up by 0.8% at 66.33 rubles.

As Tuesday trading opened on Moscow Exchange at 10:00 am, the dollar exchange rate was down by 1 kopeck at 63.39 rubles, while the euro exchange rate was up by 55 kopecks at 66.35 rubles.

The MOEX Index was up by 0.39% at 2,373.89 points, while the dollar-denominated RTS Index was up by 0.34% at 1,178.11 points, according to trading data as of 10:20 am Moscow time.