Christmas Retail In Russia At GUM Luxury Department Store [Getty Images]

A matching gold 'Panther' ring and necklace sit on display at the Cartier luxury jewelry boutique in Moscow, Russia, on Saturday, Dec. 19, 2015. The price Russia gets for oil is straining budget revenue as the government struggles to contain its biggest budget deficit in five years. Photographer: Andrey Rudakov/Bloomberg via Getty Images

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