New York's main contract, light sweet crude for delivery in January, fell 54 cents to $97.67 a barrel.

Brent North Sea crude for January delivery shed 49 cents to $108.51.

Traders were cashing out of the market after crude prices surged in overnight trade, with prices on the New York Mercantile Exchange hurdling $100 briefly before withdrawing, analysts said.

"Oil prices were boosted yesterday by the euro debt hopes and strong US consumer data over the Thanksgiving holidays," said Victor Shum, senior principal of Purvin and Gertz energy consultants in Singapore.

"So the market this morning decided to take some profits," he told AFP.

Crude markets were lifted Monday by rumours of an International Monetary Fund (IMF) bailout of heavily indebted Italy, which were later quashed by a denial from the organisation.

But traders were still cheered by record retail spending in the United States over the Thanksgiving weekend, with Americans forking out a record $52.4 billion in the Black Friday period, the National Retail Federation (NRF) said.

Sales over the long holiday weekend were up 16 percent from last year, marking the biggest dollar amount ever spent over the period, which marks the unofficial start of the Christmas shopping season, the NRF said.

However, Shum warned that markets were likely to fall in the coming days as European debt worries continued to haunt the markets.

"There are still persistent concerns about the eurozone debt situation and so the sentiment is that oil pricing got a bit too strong," he stated.

The OECD and ratings agency Moody's on Monday issued dire warnings about eurozone debt while US president Barack Obama urged top EU officials to act immediately and decisively to fix the region's financial woes.