MOSCOW (AFP) - Russia sold a record US$11.3 billion (S$14.3 billion) in foreign currency to support the ruble on March 3, when the ruble came under unprecedented pressure due to concerns about conflict in Ukraine, central bank data showed on Wednesday.

The Russian central bank sold foreign currency to buy rubles and prevent the Russian currency from falling further in value, after the market reacted with panic to parliamentary approval for President Vladimir Putin's request to allow military action in Ukraine on what has been dubbed "Black Monday".

The information was disclosed in the Russian central bank's daily information release of currency interventions and no further details were given.

But the central bank had indicated on Monday that it was prepared to make major interventions, saying that due to the increased volatility it was assessing the market situation on a daily basis.

"This measure was adopted to prevent the risks for financial stability by limiting the ruble exchange rate fluctuations," it said in a statement on Monday.

Russian news agencies said that the amount of foreign currency sold by the central bank on Monday was by far the most since records began, beating the previous record from September 2011 some five times.

Traders had already indicated the Russian central bank had made colossal interventions on Monday but this was the first time the bank's own data confirmed the magnitude of the activity.

The colossal intervention appears to have been successful, with the ruble rate now stabilising after "Black Monday", when the Russian currency crashed in value and Russian equity markets also tumbled over 10 per cent.

In early trade Wednesday, the ruble was trading at 36.185 to the dollar and 49.695 to the euro. At the close of trade in Moscow on Monday, the ruble had been trading at record low values of 36.44 to the dollar and 50.22 to the euro.

The mood on markets was also helped by comments by Mr Putin on Tuesday that there was currently no need to send Russian armed forces to Ukraine and military action would only be used as a last resort.

"The ruble recouped recent losses as Putin highlighted during the press conference that there was no need to use military force in Ukraine," said analysts at VTB Capital in Moscow.

"Nevertheless, the political uncertainty remains high and it is likely that the flow of news headlines will support market volatility," it added.

Russia's central bank is run by Ms Elvira Nabiullina, a hugely respected economist who is nonetheless seen as unstintingly loyal to Mr Putin.