Barley points out that Russia has two strengths as it tackles S&P's downgrade of its credit rating. The downgrade was a result of large capital outflows. He cites Moody's for the low level of government debt of about 13.5% of GDP in 2013, or about $265 billion. Interest payments on debt are about 1.7% of government revenues in 2014. And Russia has $442 billion in foreign exchange reserves as of April 1, to support its efforts and stabilize the economy. The weakness is that Russia depends on oil and gas exports for half of government revenues and 67% of exports, according to Moody's. Higher interest costs on Russia's bonds are one cost of the crisis, bonds due in 2023 have a yield of 5.6%, according to TradeWeb. This yield could go up higher.