Brent crude futures have fallen to 55 dollars a barrel.

北海布伦特原油期货收于每桶55美元。

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On November 1st the NYMEX opened an open-outcry pit in Dublin to handle Brent crude futures, the benchmark contract for pricing two-thirds of the world's oil.

11月1日，纽约商品交易所在都柏林的期货交易所开张，并以公开叫价的方式交易作为世界三分之二原油的定价基准的布伦特原油期货。

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In London, expiring ICE October Brent crude fell 25 cents to settle at $78.91 a barrel, leaving the discount for U.S. crude futures to Brent near $3 a barrel.

在伦敦，临近到期的北海布伦特原油10月份合约下跌25美分，收于78.91美元/桶，致使美国原油期货对布伦特贴水接近3美元/桶。

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Charts on Brent crude and WTI futures show clearly defined backwardation.

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Oil producers added pressure in the market after Brent futures on Thursday recorded its lowest settlement price since December 2010 and WTI crude notched its lowest settlement since October 2011.

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Margin requirements in the spotlight this week again after the CME Group, owner of futures exchange NYMEX, announced a 25% hike in collateral requirements for crude oil futures, putting initial, and short-lived, pressure on WTI and Brent prices.

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