Opec 's supply restrictions Cause.movement.down.loss support a rise Movement.up.gain in oil prices while high supplies Oversupply in the US provide resistance to an upward trend Movement.up.gain .

Oil futures have decreased Movement.down.loss due to concern Negative_sentiment about deteriorating Slow.weak demand and high supplies Oversupply , raising the question of whether Saudi Arabia , holder of the world 's largest spare output capacity , will disrupt Cause.movement.down.loss output .

Oil prices have plunged Movement.down.loss due to concern Negative_sentiment about slowing Slow.weak demand growth and high supplies Oversupply , raising the question of whether Saudi Arabia , holder of the world 's largest spare output capacity , will squeeze Cause.movement.down.loss output .

Oil futures have dropped Movement.down.loss due to concern Negative_sentiment about slowing Slow.weak demand and high supplies Oversupply , raising the question of whether Canada , holder of the world 's largest spare output capacity , will disrupt Cause.movement.down.loss output .

Oil futures have fallen Movement.down.loss due to concern Negative_sentiment about softening Slow.weak consumption and high supplies Oversupply , raising the question of whether Saudi Arabia , holder of the world 's largest spare output capacity , will cut Cause.movement.down.loss output .

Oil futures have dropped Movement.down.loss due to concern Negative_sentiment about deteriorating Slow.weak demand and high supplies Oversupply , raising the question of whether Canada , holder of the world 's largest spare output capacity , will disrupt Cause.movement.down.loss output .