Russian government bonds headed for the worst week since August after the downing of a warplane by Turkey on Tuesday brought a spike in geopolitical tension. The ruble retreated for a third day as crude fell. Five-year government bonds erased last week’s rally as the yield on the notes surged 40 basis points in the period to 10.11 percent as of 11:58 a.m. on Friday. The ruble has fallen 2.2 percent this week, while the benchmark Micex Index is 0.4 percent lower. The downing of the Su-24 warplane in northern Syria soured optimism that the Paris terror attacks will lead to improved ties between Russia and the West. As the government prepares to impose economic penalties on Turkey, the slump in Russian assets is being compounded by falling prices for crude. “Russian assets are pricing two things — further weakening of the oil price and open geopolitical issues with […]