Russia's currency reserves, the third-biggest in the world, are falling steadily as tumbling oil prices and an exodus of capital are piling the pressure on the central bank and government policymakers to accept a devaluation in the ruble. Oil prices which are now down 60% from their july peak, slowing economic growth and increasing investor concern are steadily draining Russia's foreign exchange reserves, which fell 19 percent (to $484.6 billion) in the 12 weeks through Oct. 31. This is down from $598.1 billion in the week before the invasion of Southern Ossetia.Russia had been using the reserves to try and contain the upward movement in the ruble was thought to present a threat to the competitiveness of exports. But resistance is now becoming increasingly difficult in the fact of a 13 percent drop against the dollar since August 1.Bank Rossii began managing the ruble's exchange rate ...