Eight Months into the US-Iran War: China's Petrochemical Inventories Running Critically Low, Price Pressures Transmitting Globally
nashnova research
Eight months into the US-Iran war, China's petrochemical sector has swung from deep oversupply to acute tightness — Goldman Sachs says roughly 95% of pre-war inventories have been drawn down, pushing prices higher along the global supply chain even as a wave of new capacity looms.
Pre-war stockpiles were massive — how did they drain in eight months?
Years of capacity expansion left China with large petrochemical inventories that acted as an unexpected buffer when the war began.
Goldman Sachs reported this month that roughly 95% of those end-product stocks have been consumed. Parsley Ong, JPMorgan's head of Asia energy and chemicals research, said inventory levels have "essentially hit bottom."
This means → the cushion is gone; every additional barrel of feedstock lost now feeds directly into higher prices.
Which part of the chain is tightest?
Aromatics — the petrochemical family that yields benzene, toluene, and paraxylene — are under the most strain. Jenny Yi, senior analyst at ICIS, said port-level aromatics stocks are at multi-year lows.
Two forces compound the shortage: naphtha exports from the Persian Gulf remain constrained, and strong Asian demand for toluene as a gasoline-blending component is diverting supply away from petrochemical use.
Iranian crude, once favored by some Chinese independent refiners, has been completely cut off by the US blockade. Beijing's priority on gasoline and diesel output forced refiners to draw down pre-war petrochemical stocks, accelerating depletion.
In plain terms = feedstock cannot get in from upstream, and the inventory in the middle is being drained faster by a "fuel-first" policy — aromatics are squeezed from both ends.
How far have prices moved?
China's PPI — the producer price index, which tracks factory-gate prices — climbed from negative territory in February to a year-on-year gain of 5% in September, beating market expectations.
Ong said the supply squeeze has already produced "inflation across most products" in China's market.
This means → as a major global exporter of petrochemicals and downstream goods, China's rising factory-gate prices are transmitting along trade links to buyers worldwide.
Can operating rates recover? What does short-term supply look like?
ICIS projects China's cracker utilization will rise from 79% in October to 81% by year-end — still well below the pre-war level of 88%.
Ong argued that downstream prices need to rise enough to restore production margins before fourth-quarter output can meaningfully recover — petrochemical buyers "will have to accept higher prices."
In plain terms = plants are not staying idle by choice; current prices still do not cover costs. Buyers who want material will have to pay up.
In the long run, has the overcapacity problem been solved?
It has not. BloombergNEF forecasts that global new polyethylene capacity — one of the world's most common plastics — will reach a record of roughly 21 million tonnes, either commissioning or ramping up.
Salmon Aidan Lee, ICIS director, noted: "Rising feedstock costs are creating short-term inflationary pressure for Chinese consumers, but this runs counter to fundamentals — products facing overcapacity will eventually revert to oversupply."
This reflects a rare combination in today's market: inventories are nearly depleted while latent capacity remains ample. Whether prices can hold before that capacity comes back online is the key test for the next phase.
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