Asia PX-Naphtha Spread Narrows in November Amid Plunging Energy Prices

The Asia paraxylene-naphtha spread, which measures the profitability of converting PX from naphtha, falls to $286.75 per metric ton on Nov. 4, below the industry’s typical breakeven threshold of $300/mt on the back of plunging upstream energy prices, OPIS data shows. The last time the spread stood at this level was on Aug. 31.

Driven by falling energy costs, the OPIS CFR China PX price slipped 9.1% week on week to $1,265/mt on Nov. 4, marking a seven-week low, according to OPIS data. Over the same period, feedstock naphtha dropped 6.9% to $978.25/mt CFR Japan. Meanwhile, front-month January Intercontinental Exchange Brent crude futures plunged to $94.62/bbl, breaking below the key $100/bbl threshold for the first time since Sept. 22.

Although a slight uptick in energy prices helped the PX–naphtha spread rebound to a weekly high of $325.25/mt on Nov. 5, ongoing upstream energy price volatility continues to weigh on market sentiment amid mounting uncertainty over how long the rally can last.

Middle East tensions since late February have triggered global supply disruptions that have led to an acute crude oil shortage and forced refiners to reduce operating rates. Consequently, tightening naphtha supplies constrained downstream PX output, driving a sustained price rally over the following months that widened the PX–naphtha spread.

Subsequently, amid peace negotiations and the signing of a U.S.–Iran memorandum to reopen the Strait of Hormuz in May–June, upstream crude prices softened from earlier spikes. This downtrend filtered through to downstream markets, narrowing the PX–naphtha spread.

Upstream energy prices remained volatile from July through October, pulling the spread along. On Wednesday, crude oil prices underwent a steep correction, amid growing optimism for an end to the war, the U.S. midterm election results, diplomatic breakthroughs in easing Middle East tensions and a gradual recovery in physical crude exports from the region, industry sources said. The slump quickly trickled down to the downstream naphtha and aromatics market.

Despite the weakening PX–naphtha spread in early November, PX demand remains firm, though it continues to lag behind year-ago levels. A gradual post-Golden Week recovery in China’s downstream polyester sector has lent support to domestic PX and purified terephthalic acid or PTA demand. China’s polyester capacity expanded to 92.84 million mt/year in October following a slate of new plant start-ups, including Zhejiang Tiansheng’s 200,000 mt/year and Shandong Fuhai’s 300,000 mt/year polyethylene terephthalate bottle-chip units, Koksan Nantong’s 200,000 mt/year bottle-chip line, and Xinfengming Xintuo’s 360,000 mt/year polyester staple fiber facility, industry sources said.

The resulting surge in polyester production is expected to intensify demand pressure on the downstream PTA sector, triggering a ripple effect which is expected to boost demand in the PX market. As Chinese domestic PX production remains net short of this escalating local demand, the country will remain structurally dependent on regional imports to bridge the supply-demand gap.

Although the wave of Chinese PTA capacity expansions took a pause in 2026—with major projects like Jiujiang Petrochemical’s 3 million mt/year plant and Urumqi Petrochemical’s 2 million mt/year facility not slated for startup until 2027—any anticipated demand reprieve for the PX sector may be offset by increased downstream polyester consumption. However, driven by firm feedstock prices this year due to the Middle East tensions, Chinese players across the polyester value chain had reduced run rates to cope with increased operational costs.

Domestic utilization rates across China’s polyester value chain presented a mixed picture in early November. Average PX run rates held steady week on week at 82.7% as of Nov. 5, an industry source said. Further downstream, average PTA operating rates slipped 3.5 percentage points over the same period to 69.7%, while polyester producers lifted their operating rates by 3.6 percentage points to meet the seasonal increase in demand.

Although downstream polyester manufacturers have begun ramping up throughput ahead of the peak winter textile cycle, overall run rates across the supply chain continue to trail levels recorded a year earlier. For comparison, year-ago operating rates stood significantly higher across all segments, with PX plants averaging 87.9%, PTA units at 76.4%, and downstream polyester facilities running at 91.5%, according to an industry source and OPIS data.

A sluggish Chinese polyester sector suggests that PX and PTA fundamentals will remain softer than last year. Over the longer term, however, substantial downstream polyester capacity additions are expected to outpace this temporary lull in upstream demand. Meanwhile, the Asia PX–naphtha spread—shaped by feedstock naphtha costs, downstream pull, and regional refining balances—will likely see continued near-term volatility under the influence of shifting energy prices.

–Reporting by Serena Seng, serena.seng@dowjones.com; Editing by Mei-Hwen Wong, mei-hwen.wong@dowjones.com