Now , either OPEC agrees to put a floor under prices in the short-term , or a prolonged period of lower Movement.down.loss prices starts to reduce Movement.down.loss long-term investment or prop Cause.movement.up.gain demand growth , he says .

Fellow Gulf Arab ally and OPEC exporter Kuwait has already said that OPEC is unlikely to disrupt Cause.movement.down.loss oil output in an effort to prop Cause.movement.up.gain prices because such a move would not necessarily be effective .

Now , either OPEC agrees to put a floor under prices in the short-term , or a prolonged period of lower Movement.down.loss prices starts to cut Movement.down.loss long-term investment or prop Cause.movement.up.gain demand , he says .

`` The big mistake was that they continued to cut Cause.movement.down.loss production to try to prop Cause.movement.up.gain the prices and the price fell Movement.down.loss anyway , '' said analyst Yasser Elguindi of Medley Global Advisors .