Weaker-than-expected US factory data also added to economic worries
US President Donald Trump has been a vocal critic of Opec, blaming it for high oil prices and urging it to increase output
OPEC said its oil output fell by only 11,000 barrels per day, month on month, to 32.97 million bpd in November, despite President Donald Trump's reimposition of sanctions on Iran
The decision provides India a huge bargaining chip in the oil and gas world of West Asia, though there are some downside risks as well
Underlining that consumer is an important focus in the meeting, Saudi Energy Minister said main aim is to bring supply demand of crude oil in balance
The kingdom chose Trump over Opec back in June. Now, the rest of the producer group may want payback
The OPEC has pumped 33.11 million barrels per day this month, down 160,000 bpd from October, which was the highest by OPEC as a group since December 2016
Worried by a drop in oil prices and rising supplies, OPEC is talking again of reducing production just months after increasing it
OPEC and its allies hold their next policy meeting in December
The stability achieved in past month is being threatened by headwinds from extraneous factors, says OPEC Secretary General
Barkindo, responding to a question whether producers needed to go beyond full delivery of the agreement, said they were taking it step by step
The two countries would not be able to produce enough oil to replace a reduction in Iranian output, says Iran's OPEC governor
The standoff over oil outlook is reminiscent of earlier periods of rising prices
The bill would change US antitrust law to allow OPEC producers to be sued for collusion; it would make it illegal to restrain oil or gas production or set those prices
Oil producers on Sunday ruled out an immediate oil-output boost, in effect rebuffing Trump's calls for action
Benchmark Brent oil reached $80 a barrel this month, prompting Trump to reiterate on Thursday his demand that the Organization of the Petroleum Exporting Countries lower prices
Now that Opec needs to boost output, its lack of power becomes even more obvious
Benchmark Brent crude oil was up 65 cents at $79.35 per barrel. US light crude was up 45 cents higher at $70.77
Exporters' group has navigated both supply and demand crises
The oil cartel has memories of the impact of 1997 Asian crisis when it boosted output, ignoring a crisis brewing in emerging markets that led to benchmark oil prices falling below $10 a barrel