•Crude futures weakened Friday with market players using the strengthening US dollar as a reason to lighten positions, traders said. "Nothing is really happening so people are using the stronger dollar as a reason to sell," a London-based trader said.

•After trading at record highs against the dollar, the euro lost around 2 cents in value as results from a survey showed that business activity in the eurozone slowed to the lowest level in 27 months. First results for NTC Research's survey of business leaders fell to 53.8 points in November, down from 54.7 points in October, touching the lowest level since August 2005.

•Trading volumes have been generally light, sources said, as the US Thanksgiving holiday severely reduced market participation on Thursday, when the NYMEX open outcry floor was closed. Trading in WTI was available on the CME Globex electronic platform. Traders also expect thin volumes to go through Friday as the NYMEX floor will close an hour earlier at 18:30 GMT.

Updated: November 23, 2007