Russia's rouble currency on Thursday plummeted past a record low it set the previous day against the US dollar as prices for Russia's main export, oil, continue to tumble.
The rouble surpassed 85 per dollar in spot trading on the Moscow Exchange, according to the bourse's website.
The former finance minister, Alexei Kudrin, predicted on Thursday that the price of oil could drop from about 28 dollars per barrel currently, to as low as 16 dollars.
"It could be 18 or 16 dollars per barrel, but for a short time, then the price will adjust and rise," Kudrin told an economic forum in Moscow, the Interfax news agency reported.
Foreign direct investments in Russia fell 92 per cent last year, Interfax said Thursday in a separate report, citing analysis by the United Nations Conference on Trade and Development.
Falling oil prices have the potential to jeopardize Russia's stability by severely weakening its economy.
In the mid-1980s, a drastic drop in the value of oil precipitated the collapse of the Soviet Union.