Reuters | Oil rises towards top of recent trading range as OPEC cuts output Reuters "This prolonged and increasing overcrowding of speculative net longs should be a cause for concern," said Jonathan Chan, an investment analyst at Phillip Futures. "Should there come a time when these speculative positions decide to unwind, oil prices ... Oil prices rise as investors increase their bullish bets Crude prices rise as investors bet big on oil strength Oil price recovery vulnerable as US shale confounds Opec |