Crude oil prices tumble as OPEC feuds

OPEC members at odd against each other and failed to agree on production output. 

Oil prices fell below $40 a barrel on Friday after a 7-hour OPEC meeting in Vienna highlighted the deep divide within the cartel. 

"The cartel is basically broken," said Matthew Smith, director of commodity research at ClipperData, which tracks global crude shipments.  

The Saudis are hell bent on continuing robust output to crowd out higher-cost producers in the U.S. and elsewhere. As of Friday, OPEC's output is effectively unchanged at near-record high levels. 

Less-affluent OPEC members, desperate to lift oil prices stuck at $40 a barrel, had been begging for an output cut. These dissenters include Algeria, Angola, Nigeria and Venezuela, which warns oil could sink to $30 a barrel if OPEC doesn't act.( s: cnn Matt Egan)