Lower prices at the pump may be pleasing to American and European consumers putting breeze in the sails of a limp economic recovery but the plunge in crude prices has now become a threat to the global recovery.

"We are in a situation today where there can only be bad news in the short term" said Jean-Michel Six chief economist for Europe the Middle East and Africa at ratings agency Standard and Poor's.

That pessimism is at odds with many delighted consumers who are suddenly left with spare money in their pockets after paying less for petrol and heating oil. This has a non-negligible impact on growth.

In Germany for example "of growth of around 1.5 per cent in 2015 around four tenths of a percentage point is due to the price of oil" said Ludovic Subran chief economist at Euler Hermes. "It is a real rebound in consumption."

But the past few months have been trying for countries which produce oil and other commodities the prices of which have slumped as demand has slowed in China - the motor of global growth in recent years.

And the longer prices stay low the more they will feel the pain as many rely on export revenue to fund social benefits.

"...financial strains in many oil exporters reduce their ability to smooth the shock entailing a sizeable reduction in their domestic demand" the International Monetary Fund said last week in its latest update to its World Economic Outlook report.

The drop in prices for oil and raw materials "is hitting world trade hard" said Six.

World trade declined 0.1 per cent in November from October according to estimates from the Dutch government's economic policy analysis unit. A less volatile measure found trade growth slowed to 0.8 per cent in the three months to November from 1.7 per cent in the three months to October.

The reason is simple: with less revenues commodities producing countries have less money to import goods. Demand from these commodity producing nations had helped support Europe and the United States after the global financial crisis in 2008 but is now shaping up to be a drag.

"The longer the oil counter-shock lasts the more the winners and losers will diverge whether it be in terms of countries or sectors" said Surban. Oil price developments have been a boon for airlines but oil companies have been pummelled.

"In the energy sector there could be consequences" warned Olivier Garnier chief economist at Societe Generale who worries of debt problems in the industry. Moody's rating agency on Friday warned it was reviewing 120 energy metals and mining companies for downgrade.

"These reviews reflect a mix of declining prices that are near multi-year lows weakening demand and a prolonged period of oversupply that will continue to significantly stress the credit profiles of companies in these sectors" said Moody's.

Worse falling oil prices risk "destabilising a certain number of countries" that depend on export revenues to buy social peace said Societe Generale's Garnier.

For Subran countries like Algeria Angola Ecuador and Saudi Arabia risk very quickly "running out of political economic tools to eke out a bit of growth".

To confront their falling revenues producer countries do not have a choice: "more debt more privatisation or austerity" said the chief economist at Euler Hermes.

Several Gulf nations have followed Saudi Arabia's lead in taking the unprecedented measure of cutting hefty petrol subsidies. This has led to the somewhat paradoxical situation of rising pump prices as crude tumbles.

But a marked rebound in oil prices however unlikely that may appear at the moment would be 'bad news' for the global economy as well said Six. - AFP