The price of Brent crude fell almost by 3 percent between Wednesday and Friday, after Russia and OPEC signalled they were considering increasing output following several months of tightening supply.
Since its low point in mid-January 2016, the price of crude oil has made a sustained recovery, but fresh concerns over Venezuela and the future of the nuclear deal with Iran could pare back the gains.
A hole created by $2 trillion of underinvestment could have an amazing consequence.
The cartel's beliefs about the price of crude are critical to how the overall energy markets behave.
Government data showed a weaker-than-expected supply draw, which sent oil prices sinking, taking oil stocks with it.
From its humble beginnings to its global clout, these are things everyone should know about this market-moving cartel.
Crude oil's rally came to an end this week on fears that too much oil will continue to be a problem.
After initially aiming to boost crude oil prices to $55 a barrel, key OPEC members like Saudi Arabia, Kuwait, and Iraq have now set their sights on $60 a barrel of oil.
OPEC's naysayers may want to backtrack on their skepticism, as a recent report put their compliance with proposed cuts at more than 100 percent.
The American oil and gas sector's high productivity appeared to have dampened OPEC's attempts to jack up the commodity's price.
Russian Energy Minister Alexander Novak praised the production cuts, conducted in a joint effort with OPEC, and said the oil market would've been "chaos" without them.
The largest oil producer in the world is quietly cheating on the same OPEC deal its state owner helped to establish in November.
Less oil production means consumers should prepare to fork over more money at the pump in the coming months.
Brent crude rose sharply Thursday in the wake of Secretary General Mohammad Sanusi Barkindo's comments.
Earlier in 2016, Nigeria saw a major decline in its output mostly due to continuous attacks on its oil infrastructure by militants in the Niger Delta.
Oil prices rose Thursday as Saudi Arabia discussed proposed reductions and U.S. stockpiles fell during an OPEC push to boost profit.
Brent crude surpassed $56 and continued to climb after Russia and Kazakhstan joined OPEC's production cut.
OPEC's decision to curb production last week sent oil prices soaring, but the cartel promised Monday to work with nonmember countries to keep prices from fluctuating too wildly.
The dollar hit a value not seen since February, thanks in part to strengthened American oil giants.
The day before Saudi Arabia was set to attend an OPEC meeting over capping output, Riyadh announced another drop in its foreign currency reserves.
Saudi Arabia's oil minister's comments over the weekend on the effects an OPEC production cap might have on the energy market's future sent prices gyrating Monday.
The world’s two largest crude oil producers were scheduled to meet Monday, ahead of the closely-watched OPEC meeting Wednesday.