Oil giant cut to junk by S&P after Brazil downgrade

The oil producer mired in Brazil's largest-ever corruption investigation was downgraded to junk by Standard & Poor's, which signaled the possibility of more cuts to come.

Oil higher on bets US crude output will slide

• Mark Shenk

Oil has snapped a three-day losing streak, as speculation grew that declining American crude production may whittle away a global surplus.

Oil drops as US supply seen adding more to global glut

• Mark Shenk

Oil tumbled as estimates that US crude stockpiles rose reinforced worries that there's no end in sight for the global supply surplus.

Capital markets in control of oil prices, Citi says

Shale will have to grapple with a higher cost of capital, giving investors extra sway over the future of US shale and, by extension, oil prices.

Jeffrey Gundlach says oil rally will be prove temporary

• Mary Childs

Any jump in the price for oil is likely to be short-lived, according to Jeffrey Gundlach, co-founder of DoubleLine Capital.

Oil gains 4pc as equities rally

​Brent crude settled up 4 per cent as strength in stock markets helped the global oil benchmark recoup the bulk of its losses from the previous session.

Oil lower as Russia rebuffs call for help

• Rakteem Katakey and Angelina Rascouet

Oil declined for a second day after another Russian official ruled out cooperation on production cuts with OPEC, adding to signs that a global oversupply will persist.

Drillers idling rigs again in the US as oil price swings

• David Wethe

US oil explorers returned to idling rigs this week as crude traded at a six-year low on concerns that a global surplus will worsen.