Russia’s ruble rose with oil, extending the biggest monthly gain in global markets and boosting speculation the Bank of Russia will resume cutting interest rates. The currency added 0.5 percent to 71.12 against the dollar by 8:30 p.m. in Moscow, taking its appreciation in the past month to 12 percent. Brent oil, the blend used to price Russia’s main export variety, climbed 3 percent on Wednesday to $40.88 a barrel, heading for the highest close since Dec. 4. Oil’s slump to a 13-year low in January and subsequent rebound have whipsawed the ruble, driving its correlation with crude toward the highest on record. Six-month forward-rate agreements show the market […]