REUTERS

The euro exchange rate also rose more than RUB 3 in the first half hour of trading. The cost of a single European currency reached RUB 92.555 to the euro, which is RUB 3.909 or 4.4% higher than the closing level of the previous trading session. However, the euro has not yet reached its all-time low – on December 16, 2014 the cost of a single European currency rose to RUB 100.74 to the euro.

Read alsoRuble at 90 a dollar may trigger interventions: BloombergThe collapse of the ruble is due to falling world oil prices. During today's trading on the ICE stock exchange, March futures for Brent crude fell to $27.54.

The Central Bank of the Russian Federation set the official exchange rate for Thursday, January 21, at RUB 79.4614 to the dollar, RUB 87.0314 to the euro.

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In turn, speaking at the Russian forum of entrepreneurs, Russian President Vladimir Putin said optimistically that the depreciation of the ruble would open "additional opportunities" for Russian businessmen.