- Summary- This content was produced in Russia where the law restricts coverage of Russian military operations in UkraineMOSCOW, Dec 27 (Reuters) - The rouble dived around 3% against the dollar on Tuesday, failing to consolidate a recovery from last week's slide as the market comes to terms with the prospect of lower export revenue in the wake of restrictions on Russian oil."At the end of December, the rouble is likely to remain extremely volatile as the market will need to find a new equilibrium under changed trade flows and increased sanctions pressure," BCS World of Investments said in a note."This week, the rouble is expected to fluctuate in the range of 68-71 (per dollar)."Now, with exports and revenues falling, a weaker rouble is more beneficial, First Deputy Prime Minister Andrei Belousov said on Tuesday.Brent crude oil , a global benchmark for Russia's main export, was up 1% at $84.8 a barrel while Russian stock indexes were mixed."