A woman waits for her family while shopping at a supermarket in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

Citizens walk in a passageway in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

A woman choose fruits at a supermarket in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

Citizens are seen at a supermarket in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

A woman stands in front of a hat booth in a passageway in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

A woman walks at a supermarket in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

Citizens are seen at a supermarket in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

Citizens are seen at a supermarket in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

Citizens are seen at a beauty store in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)

A woman playes with her smart phone in a subway in Moscow, Russia, Dec. 17, 2014. Russian Prime Minister Dmitry Medvedev on Wednesday warned citizens and companies of attempting to make profit in the current unstable financial situation, calling the ongoing events at the currency market a "game of emotions." (Xinhua/Dai Tianfang)