Market players say oil prices could plunge to $60/bbl if OPEC does not agree a significant output cut when it meets in Vienna this week. Brent crude futures have fallen 34% since June to touch a four-year low of $76.76/bbl on November 14, and commodity fund managers say they could tumble further if OPEC does not agree to cut at least 1 Mbbl/d. (11/24/14)

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