Meanwhile, "The Guardian's" economics editor Larry Elliot has had this to say about reports that the Russian central bank may have intervened to prop up the ruble (you can find the original article here):
So much for letting the ruble find its own level. The Russian central bank was reported to be active in the currency markets on Monday as it sought to arrest what was looking like the biggest one-day fall in the ruble since the debt default of 1998.
It’s easy to see why Moscow backtracked. The ruble was down by more than 6% against the dollar in early trading and is vying with the Ukranian hryvnia as the world’s worst performing currency of 2014. The word "freefall" is much overused in financial markets. Not this time.
More than two-thirds of Russia’s exports are from the energy sector, and the cost of crude has dropped by 40% since the summer. The selloff has accelerated since the Opec oil cartel decided against production curbs at last week’s meeting. Downward pressure on the ruble intensified amid market speculation that there would be no intervention.
There were reasons for adopting a hands-off approach. Chucking a chunk of Russia’s sizeable reserves at a rapidly falling ruble could be an expensive and ultimately pointless exercise. Intervention is normally more effective when it is going with the grain of market sentiment, and the ruble is currently toxic.
What’s more, a weaker currency should help to support growth and take some of the pressure off the budget by boosting the ruble value of Russia’s oil reserves.
So why did Moscow blink, given that the central bank’s official line has been that it would only step in to defend the ruble if there is a threat to financial stability?
That, though, is precisely the point. A ruble in freefall does pose a threat to financial stability in two big ways. Firstly, it increases the foreign currency value of Russia’s foreign liabilities, currently worth around $200bn (£127bn). Secondly, a continued fall in the exchange rate will encourage Russian citizens to convert rubles into dollars and euros, thus increasing the risk of bank runs.
Russia’s banks are in better shape than they were in 1998 and the government has the financial firepower to help them out should they get into trouble. But a plunging oil price and a plunging ruble still make the banks vulnerable. Hence the need to intervene.
Our news desk has some more reaction to the ruble's dramatic plunge this morning (from RFE/RL's Rikard Jozwiak in Brussels):
The EU enlargement commissioner says that the steep decline of the Russian ruble is proof that sanctions which the West has imposed on Moscow over its actions in Ukraine are having an effect.
EU Neighborhood Policy and Enlargement Negotiations Commissioner Johannes Hahn made the comment in Brussels on December 1 as the Russian currency lost 8 percent, falling to 53.29 to the dollar and a 66.50 to the euro in afternoon trading.
Hahn told a news briefing, "I think that this is more than proof of the impact of the necessary [sanctions] and I hope that it will contribute to Russia's making the first step towards the normalization of the situation."
The ruble has fallen more than 40 percent this year mostly because of international sanctions imposed over Russia's role in Ukraine and the decline in oil prices.
Russia generates about half its budget revenues from oil and gas exports.