Global: OPEC+ output pause after Sep’26 may support petrochemical feedstock prices

• OPEC+ likely to complete Sep’26 output increase, then pause further hikes
• Stable crude, naphtha prices expected to support olefin production costs

OPEC+ is expected to complete its planned production increase in September before pausing further output hikes for the remainder of 2026, signalling a strategic shift from restoring supply to preserving market balance. While the producer group is likely to raise production targets by around 188,000 bpd in September, approximately 2 million bpd of broader production cuts agreed in 2022 will remain in place. The anticipated pause reflects a combination of geopolitical uncertainty, internal negotiations over future production baselines, and concerns over the medium-term supply-demand outlook, with implications extending across the petrochemical value chain.

Why OPEC+ is expected to pause output increases

The September increase would mark the completion of the phased rollback of voluntary production cuts introduced in 2023. However, rather than continuing to add barrels to the market, OPEC+ appears focused on maintaining price stability while it finalises a review of members’ maximum sustainable production capacities. The review will determine production baselines for 2027, a politically sensitive process as several members, including Iraq, continue to seek higher quotas to reflect expanding production capacity.

Beyond internal negotiations, geopolitical developments remain a key consideration. The recent conflict involving Iran exposed the vulnerability of Middle East oil supplies and reduced the group’s effective spare production capacity. At the same time, expectations of a potential oil surplus in 2027 have strengthened the case for a measured production strategy, allowing OPEC+ to retain flexibility while avoiding the risk of oversupplying the market.

Feedstock impact

For downstream petrochemical industries, the significance of the decision lies less in the September production increase and more in the likelihood that disciplined supply management will continue to support crude prices. Naphtha, the primary feedstock for steam crackers, remains at $840-845/t CFR Far East Asia, indicating that feedstock costs continue to hold despite expectations of additional crude supply.

Stable crude and naphtha prices are expected to support production economics for olefin producers, reducing the likelihood of a sharp decline in feedstock costs. While regional operating rates and downstream demand will continue to influence polymer pricing, feedstock economics are likely to provide a floor for market sentiment.

Industry implications

The expected pause in OPEC+ production increases is unlikely to have an immediate impact on polymer prices, but it reinforces a relatively stable cost environment for producers. Any sustained movement in polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and other commodity polymers will continue to depend on regional supply-demand fundamentals, import availability and downstream consumption rather than crude oil alone.

Looking ahead, the key variables for the polymer industry remain geopolitical developments in the Middle East, the outcome of OPEC+’s 2027 production capacity review and the pace of global industrial demand. Unless these factors change materially, the group’s disciplined production strategy is likely to keep feedstock costs relatively supported through the fourth quarter of 2026.