The ruble jumped the most since August, rebounding from its lowest level on record, as a recovery in crude prices encouraged investors to buy assets in the world’s biggest energy exporter. Russia’s currency jumped 3.6 percent to 79.7450 per dollar as of 10:20 a.m. in Moscow after touching a record intraday low of 85.999 on Thursday. That pared its weekly slump to 2.7 percent. The RTS stock index surged 5.7 percent, the most since August, while five-year government bonds climbed for the first time in three days. One-month swings in the ruble have made it the most volatile currency among emerging-markets peers after oil prices collapsed to a 12-year low. At the same time, Bank of Russia Governor Elvira Nabiullina said the currency is approaching “fundamental levels” and interventions weren’t required unless “risks to financial stability” appeared. “The ruble keeps tracking changes in the oil price,” Oleg Kouzmin, chief […]