In Q3 2026, China’s styrene prices rebounded from lows, with the Jiangsu market averaging 9,144.02 yuan/ton, down 2.03% quarter-on-quarter but up 25.45% year-on-year. Geopolitical disruptions drove raw material prices higher, strengthening cost support compared with Q2. Supply and demand were strong early before weakening, while main port inventory accumulation fell short of expectations. For product inquiries, the Achilles Chemical team supplies a broad portfolio of aromatic and petrochemical intermediates.
Total supply fell 7.07% quarter-on-quarter and 13.19% year-on-year, as domestic production cuts—driven by scheduled maintenance and unplanned shutdowns amid worsening losses—far outweighed a small rise in imports. Total demand fell 7% quarter-on-quarter and 3.05% year-on-year, with both domestic and external demand weakening. Downstream operating rates hit a historic seasonal low of around 46%, and although profits recovered somewhat in September, the peak season was lackluster and buying remained just-in-time. Looking ahead to Q4, costs may remain high and range-bound, while fundamentals may first support and then pressure the market.
Q3 Price Rebound: Cost and Fundamentals in Tug-of-War
During the quarter, market prices fluctuated upward, and in September prices once again broke through a near-five-year high, the result of a phased resonance or tug-of-war between geopolitically driven cost changes and fundamentals. In July, cost support and improving fundamentals jointly drove prices higher; in August, fundamentals strengthened further while costs temporarily retreated, narrowing price fluctuations; in September, stronger cost-side support—especially from benzene—resonated with stronger fundamental expectations, supporting prices to spike. The Q3 styrene price high occurred on September 30 at 10,950 yuan/ton, and the low occurred on July 2 at 7,250 yuan/ton.
Raw Materials and Cost Support
In Q3, raw materials rebounded from lows overall, providing stronger support to styrene than in Q2. In July, Middle East conflicts resurged, the Strait of Hormuz was closed again, and international oil prices rebounded from lows. In early August, the market expected the US-Iran conflict might ease, and oil prices fell, but shipping efficiency through the strait remained low, limiting the decline. At the end of the month, the US shifted from military strikes against Iran to economic blockade, and oil prices fell broadly, which to some extent weighed on the domestic chemical market. In September, oil prices were still mainly driven by geopolitical tensions, rising first and then falling, but the supply gap and low inventories both provided bottom support.
Pure benzene main port inventories had been continuously destocking since March, and by mid-August, main port inventories fell to a low of around 23,000 tons. Against the backdrop of continuous destocking in Q3, prices followed oil prices upward, and in mid-to-late September, boosted by downstream restocking and a late-month short squeeze, prices rose against crude oil, providing cost-side support for styrene gains.
Among the three production processes, profits diverged: the non-integrated ethylbenzene dehydrogenation unit profit fell 38.52% quarter-on-quarter; the integrated ethylbenzene dehydrogenation unit profit rose 37.58%; and the PO/SM unit turned from positive to negative, down 218.66%. The decline in unit profits was the main reason directly leading to an increase in unplanned production cuts in late September.
Supply: Deep Domestic Production Cuts
In Q3, China’s total styrene supply fell 7.07% quarter-on-quarter and 13.19% year-on-year, with the decline in domestic production far exceeding the increase in imports. The larger-than-expected decline in domestic production was due, on the one hand, to scheduled maintenance at units including Dushanzi, Lihuayi, Yanchang Yan’an Refinery, Anqing Petrochemical, and Lianyungang Petrochemical; and on the other hand, to increased unplanned production cuts and shutdowns as losses worsened at non-integrated ethylbenzene dehydrogenation and PO/SM units. In Q3, China’s total domestic styrene production was 4.1716 million tons, down 7.61% from Q2; imports were around 26,700 tons, up 23,900 tons from Q2. The absolute volume of imports was relatively small, with limited impact on overall supply.
Demand: Weak Peak Season and Just-in-Time Buying
In Q3, China’s total styrene demand fell 7% quarter-on-quarter and 3.05% year-on-year. Domestic demand fell 6.76% quarter-on-quarter. Caught between high costs and weak demand, the combined operating rate of styrene downstream units once fell to around 46%, the lowest level for the same period in history. Entering the traditional consumption peak season in September, downstream combined profits recovered somewhat, but terminal consumption remained weak. The profit recovery failed to effectively lift downstream operating rates, and major downstream sectors still mainly maintained just-in-time procurement, with no concentrated stockpiling.
Exports fell nearly 50% quarter-on-quarter, mainly because the strait partially restored raw material supply and overseas styrene unit operating rates rebounded, filling part of the supply gap. However, demand from India and South Korea remained rigid. Although export volumes declined from Q2, the monthly average stayed at a relatively high level of around 100,000 tons, and Q3 exports increased 433% year-on-year. Overall, demand-side performance was relatively weak.
Q4 Outlook: Rise First, Then Fall
Looking ahead to Q4, costs may remain high and range-bound, while fundamentals may first support and then pressure the market. Prices are expected to rise first and then fall, with risks such as sudden changes in the Strait situation warranting close attention. Buyers should remain flexible and rely on just-in-time procurement while monitoring both crude oil cost drivers and the pace of domestic unit restarts.
