"About 5 trillion rubles is planned to be spent on stabilization measures," Medvedev said. "But this is not a final figure. We understand that additional decisions may have to be made given the scale of the problem."
Russia has been hard hit by the global financial crunch that began with the subprime mortgage crisis in the United States last summer and has quickly spread to the rest of the world.
Russia's stock market has lost around 70% of its value since May, and the Central Bank has spent billions of dollars to prop up the ruble, which is sinking amid the economic turmoil and falling oil prices.
Russians are buying up dollars and euros in cash, further weakening the national currency, and bank depositors are withdrawing savings.
The World Bank said in its Russian Economic Report on Tuesday net capital outflow from the country could reach $50 billion in 2008, and double in 2009 amid a lack of large foreign investment.
The bank also forecast that Russia's oil-dependent economy would grow 6% this year and 3% next year, down from earlier projected 6.8% and 6.5%.
