Investing.com - Crude oil prices dropped in early Asia on Monday ahead of key China PMI data.
On the New York Mercantile Exchange, crude oil for January delivery traded at $66.51 a barrel, down 0.83%.
China is to release official data on manufacturing activity in November that came in at 50.8 in October as well as the HSBC manufacturing index expected at 50.0.
Elsewhere, on the ICE Futures Exchange in London, Brent for January delivery dropped $2.43, or 3.35%, on Friday to settle at $70.15 a barrel by close of trade.
Last week, oil futures plunged to levels not seen in more than four years on Friday, after the Organization of the Petroleum Exporting Countries decided not to cut output at the conclusion of its highly-anticipated meeting.
The 12-member group is responsible for approximately 40% of global supply. Their next meeting is scheduled for June 5, 2015.
Concerns over weakening global demand combined with indications that OPEC producers will not cut output have weighed on prices in recent months.
In the week ahead, the U.S. is to release the U.S. jobs report for November on Friday as market players attempt to gauge the strength of the world's biggest economy and its impact on the Federal Reserve's monetary policy.