Russia's ruble on Thursday continued to plummet to new record lows against the dollar, tumbling by over 4 percent beyond 85 to the greenback on falling oil prices.

The ruble -- which has already been battered over the past 18 months by low energy prices and Western sanctions over Ukraine -- also weakened to over 93 against the euro. 

The IMF on Thursday opens formal nominations for the next term of managing director, with incumbent Christine Lagarde seen as the leading candidate despite possibly facing a trial in France.

The International Monetary Fund said nominations for the five-year term to run the global crisis bank beginning in July will close on February 10.

Two top U.S. bankers said Wednesday that the oil price collapse is likely to help economies long-term, even as markets slump in reaction. 

JPMorgan chief executive Jamie Dimon said he is still hoping the stock rout of early 2016 that worsened Wednesday will turn out to be only a "speedy adjustment" that does not signal a major global slowdown.

In an unprecedented step, Europe's five largest airline groups including budget carriers EasyJet and Ryanair Wednesday launched a new alliance to combat rising airport charges amid a fierce battle with Gulf rivals.

The new association dubbed Airlines for Europe (A4E) brings together the budget airlines with giants Lufthansa, Air France-KLM and the International Airline Group, parent company of both British Airways and Iberia.

Ukraine on Wednesday escalated its bitter trade war with Russia in punishment for Moscow's seeming efforts to choke off its westward-leaning neighbor’s economic ties with other former Soviet states.

Prime Minister Arseniy Yatsenyuk told a cabinet meeting that Kiev was adding 70 food products to its existing list of items Russia cannot sell in Ukraine.

Chinese President Xi Jinping and Saudi King Salman on Wednesday attended a ceremony to mark the opening of a joint-venture refinery, a symbol of Beijing's deepening involvement in the Middle East.

The event took place in the Saudi capital Riyadh on the second day of Xi's first visit to the region. He was to depart later in the day for Egypt and will also travel to Saudi Arabia's rival Iran.

Falling world oil prices combined with a fixed fee for the use of export pipelines mean South Sudan is now losing money on every barrel it sells, analysts said Wednesday.

South Sudan currently earns around $20 (18 euros) a barrel for its low quality oil that sells at a discount to the Brent crude benchmark -- on Wednesday trading at $28 (26 euros), said Emma Vickers of Global Witness, a London-based campaign group.

The ruble fell close to a historic low on Wednesday, as the dollar climbed past the psychological threshold of 80 rubles for the first time since the shock plunge of the Russian currency in December 2014.

After a day of relative calm, the ruble continued on a downward spiral, falling to 80.01 against the dollar, just eight kopecks away from the historic low of December 2014, as oil prices, key to Russia's economy, were testing 12-year lows.

The tide of Middle East refugees should boost European economic growth over the short term, but their longer-term impact will depend on efforts to integrate them, the IMF said Wednesday.

In a new study to be presented at the World Economic Forum in Davos, Switzerland this week, the International Monetary Fund said that governments making strong efforts to bring refugees into the workforce can lessen the chance that they will become a burden on the state budget.

Rising risks to the global economy and a string of jihadist attacks around the world overshadowed Wednesday's opening of an annual meeting of the rich and powerful in a snow-blanketed Swiss ski resort.

The Taliban assault on a university in Pakistan that left at least 21 dead was a jolt to the billionaires, business titans and leaders, including Pakistani Prime Minister Nawaz Sharif, gathering in the Swiss Alpine village of Davos.