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Oil posts 8% weekly loss on potential OPEC+ supply additions

Published by Global Banking & Finance Review

Posted on October 3, 2025

3 min read

· Last updated: January 21, 2026

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Oil posts 8% weekly loss on potential OPEC+ supply additions
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(Reuters) -Oil prices rose slightly on Friday after four straight sessions of declines but were on track for their steepest weekly decline since late June due to market expectations that the OPEC+

Oil posts 8% weekly loss on potential OPEC+ supply additions

Impact of OPEC+ Supply on Oil Prices

By Arathy Somasekhar

Weekly Price Trends

HOUSTON (Reuters) -Oil prices settled higher on Friday but posted a weekly loss of 8.1% after news of potential increases to OPEC+ supply.

Market Analysis and Predictions

Brent crude futures closed up 42 cents, or 0.7%, at $64.53 a barrel by, while U.S. West Texas Intermediate crude was up 40 cents, or 0.7%, at $60.88.

Supply Chain Updates

For the week, Brent fell 8.1%, the largest weekly loss in over three months. WTI tumbled 7.4% in the week.

"The expected increase in OPEC+ production and the Iraq/Kurdish pipeline beginning to flow after being shut in the past two years is keeping sellers present in crude,"  said Dennis Kissler, senior vice president of trading at BOK Financial.

"Hamas is also starting negotiations with the Trump administration on a peace plan. Add in the bearish EIA storage data from earlier this week and it's hard to be bullish crude in the near term," Kissler said.

Eight OPEC+ countries are likely to further raise oil output on Sunday with the group’s leader Saudi Arabia pushing for a large increase to regain market share and Russia suggesting a more modest rise, four people with knowledge of the OPEC+ talks said.

Potentially higher OPEC+ supply and slowing global crude refinery runs owing to maintenance and a seasonal dip in demand in the months ahead are set to weigh on market sentiment, analysts said.

"Demand indicators have fallen a touch through the Atlantic Basin as summer demand comes to an end. The over-supplied implied balance from a fundamentals perspective starting in October is gaining ground," said Rystad Energy analyst Janiv Shah.

JPMorgan analysts, meanwhile, said they believed September marked a turning point, with the oil market heading towards a sizeable surplus in the fourth quarter and into next year.

Meanwhile, crude oil flowed through a pipeline from the semi-autonomous Kurdistan region in northern Iraq to Turkey on Saturday for the first time in 2-1/2 years, Iraq's oil ministry said earlier this week.

Meanwhile,  U.S. President Donald Trump gave Hamas until Sunday night to agree to his proposal to end Israel's war in Gaza. 

U.S. crude oil, gasoline and distillate inventories rose last week as refining activity and demand softened, according to the Energy Information Administration on Wednesday, further weighing on prices.

On the supply side, producers cut oil rigs by 2 to 422, oilfield service provider Baker Hughes said. 

Elsewhere on Friday, a fire broke out at Chevron's El Segundo refinery overnight, though a county official said the flames had been confined to one area. The refinery is one of the largest on the U.S. West Coast, with capacity of 290,000 bpd.

It was not immediately clear if there was any impact on production, but the impact on oil prices could be limited, analysts said.

(Reporting by Robert Harvey and Sudarshan Varadhan; Editing by David Goodman, Susan Fenton, Chris Reese and Diane Craft)

Key Takeaways

  • Oil prices fell 8% this week due to potential OPEC+ supply increases.
  • Brent crude and WTI crude both experienced significant weekly losses.
  • OPEC+ countries may raise oil output, affecting market sentiment.
  • U.S. crude inventories rose, further impacting prices.
  • Kurdistan pipeline resumed operations after 2.5 years.

Frequently Asked Questions

What is OPEC+?
OPEC+ is a coalition of oil-producing countries that includes the Organization of the Petroleum Exporting Countries (OPEC) and other major oil producers, such as Russia, aimed at regulating oil production to influence prices.
What are Brent crude futures?
Brent crude futures are contracts for the future delivery of crude oil, priced based on the Brent blend of crude oil from the North Sea, serving as a global benchmark for oil prices.
What is West Texas Intermediate (WTI)?
West Texas Intermediate (WTI) is a grade of crude oil used as a benchmark in oil pricing, primarily produced in the United States, known for its light and sweet characteristics.
What is a bearish market?
A bearish market is a market condition characterized by declining prices, often leading to pessimism among investors, who expect further declines in asset values.
What is crude oil inventory?
Crude oil inventory refers to the stock of crude oil held by producers, refiners, and storage facilities, which is an important indicator of supply and demand in the oil market.

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