Currency gains 11.2% against US dollar at 6:24 pm in Moscow, ending a 7-day, 22% drop
Brent crude's collapse to a five-year low is providing a tailwind for airlines posting record earnings
Companies are raising prices seeking to offset the drop in the value of the sales they make in roubles
The 46% drop in crude since June has hurt the economies of oil-producing countries from Russia to Nigeria
The EU seeks fresh information from companies that compete with Google on shopping, maps, travel and other search services
China has pledged to slash greenhouse emissions and adoption of electric vehicles will help the cause
Producer-price index dropped 2.7% in November from a year earlier; consumer prices rose 1.4%, compared with the 1.6% increase in October