The ruble ended a four-day rally as signs that oil’s rebound won’t last cast a shadow over the biggest currency rally globally this month. The Russian currency weakened as much as 1.2 percent against the dollar as Brent crude, the grade used to price Russia’s main export blend, traded below $60 for a second day. The country’s stocks and bonds also retreated. As options traders bet oil’s rebound will reverse because of rising U.S. production, the prospects for Russian assets to hold on to gains are declining as the slide in oil and sanctions over Ukraine threaten to worsen a looming recession. Brent has tumbled 6.4 percent in the past two days, trimming its advance from last month’s six-year low to 30 percent. “Russian assets are closely following the oil price and the outlook for oil is negative,” Andrey Vashevnik, the chief investment officer at R&B Investment […]