Bloomberg OPEC’s work isn’t done yet. Oil traders and investors cheered Wednesday’s landmark deal to curtail oil production. But history shows compliance with past accords to be patchy at best. Even if countries stick to their output caps, those that won exemptions could make the collective target all but unreachable if they boost production. The difficulty of monitoring non-OPEC …

  Bloomberg Brent oil capped its biggest weekly gain since 2009 after OPEC approved its first supply cut in eight years, with attention now shifting to compliance with the deal and how other producers will react to a price rally. Futures closed at the highest in more than a year in London and New York. OPEC’s three largest producers — …

  Bloomberg No matter where you look in the oil market, key markers watched by traders have been going haywire since Wednesday — and they show little sign of letting up. Whether it’s a futures curve suddenly suggesting concerns that supply is shrinking or record trading of contracts designed to protect against price fluctuations, OPEC’s first output cut in eight …