The ruble fell with oil prices, retreating for a fourth day as market turmoil that’s driven the strongest swings in the Russian currency since May forced Vladimir Putin’s government to cut its budget planning horizon from three years to one. The ruble weakened 0.6 percent against the dollar to 67.6170 by 5 p.m. in Moscow, heading for a 3.3 percent retreat for the week. The currency’s one-month historical volatility rose to 38.3, the highest since May and almost four times the level in October before the central bank stopped managing the exchange rate. Concern over a slowdown in China, Russia’s biggest trading partner, has pummeled commodity prices and rattled emerging markets that are bracing for an outflow of funds as the Federal Reserve weighs its first rate increase since 2006. Putin said on Friday he’s asking parliament to support a switch back to a one-year budget horizon because it’s […]