China Emerges as SM Swing Supplier Amid Mideast Crisis
The recent conflict in the Middle East has fundamentally altered the global styrene monomer trade, accelerating China’s emergence as the region’s dominant swing supplier while exposing the petrochemical industry’s dependence on Gulf feedstock and exports.
Unlike previous geopolitical events that primarily drove freight volatility, the latest disruption has directly removed sizeable volumes of Middle Eastern SM from international markets, as security concerns surrounding the Strait of Hormuz curtailed exports and complicated vessel movements. The sudden loss of supply has forced importers across Asia and Europe to rapidly diversify procurement strategies, creating an unprecedented opportunity for Chinese producers to expand their presence beyond traditional export markets.
The shift coincided with China’s own transformation from one of the world’s largest SM importers into a market increasingly capable of supplying both domestic consumers and overseas buyers. Years of aggressive capacity additions, coupled with improving self-sufficiency, enabled Chinese producers to redirect surplus material into export markets precisely as global buyers scrambled to replace disrupted Middle Eastern cargoes.
Gulf supply collapses
The collapse in Middle Eastern exports occurred almost immediately after tensions escalated around the Strait of Hormuz.
According to Global Trade Tracker or GTT data, SM exports from the Middle East plunged from 123,138 metric tons in February to only 17,377 mt in March before virtually disappearing, with shipments falling to just 1,064 mt in April and 1,199 mt in May. The dramatic decline effectively removed one of Asia’s largest merchant supply sources from the global market, leaving traditional buyers across India, Europe, Pakistan and Turkey competing for replacement cargoes.
Unlike previous supply disruptions, this shortage emerged alongside a sharp rally in crude oil and feedstock prices. As energy markets reacted to renewed geopolitical uncertainty, higher benzene costs rapidly lifted SM prices across Asia, increasing replacement costs even as physical availability tightened.
The combination of higher prices and shrinking export availability rapidly reshaped regional trade flows. Rather than relying on long-established Middle Eastern supply chains, buyers increasingly turned to China, whose producers were among the few capable of offering prompt spot cargoes in large volumes.
Stronger feedstock supports China’s domestic market
Within China, domestic SM prices strengthened throughout the first half of July despite relatively subdued downstream polymer demand.
The midpoint of the OPIS ex-tank East China assessment climbed to 8,730 yuan/mt ($1,102/mt CFR China on an import parity basis) on July 17 from 7,255 yuan/mt on July 2, supported largely by rising benzene costs rather than improvements in end-user consumption. The increase reflected the strong correlation between SM and its primary feedstock as escalating crude oil prices filtered through the regional aromatics chain.
Supply conditions simultaneously became increasingly supportive, as several domestic producers went offline because of scheduled maintenance or persistent margin pressure. PetroChina Dushanzi commenced a month-long turnaround during July, while Hebei Shengteng suspended production after prolonged losses. Sinopec Hainan also entered maintenance, Jiangsu Hongwei’s 450,000 mt/year propylene oxide-styrene monomer unit remained offline without a confirmed restart schedule, and delayed restarts at Zibo Junchen further tightened prompt availability. Although Ningxia Baofeng was expected to resume production following its unplanned June outage, the restart was insufficient to offset production losses elsewhere.
The cumulative impact of these outages was reflected in inventories. Commercial stocks in East China fell to 84,800 mt during the week ended July 17, declining by approximately 16,000 mt from the previous week to the lowest level in a year. Inventory drawdowns reflected both constrained domestic production and stronger export activity, leaving sellers with limited prompt cargo availability despite only cautious purchasing by downstream consumers.
Domestic demand, however, remained far from robust. Downstream manufacturers continued purchasing only hand-to-mouth requirements while relying on existing inventories accumulated earlier in the year. Operating rates across expanded polystyrene, general-purpose polystyrene, acrylonitrile butadiene styrene and unsaturated polyester resin sectors remained well below historical averages as weak manufacturing margins discouraged higher operating rates. Although rising feedstock costs provided some support to finished polymer prices, profitability throughout much of the downstream plastics sector remained under pressure, limiting any meaningful recovery in consumption.
Consequently, China’s SM market increasingly relied on exports rather than domestic demand to absorb surplus production, setting the stage for one of the most significant shifts in Asian petrochemical trade flows in recent years.
China’s Export Boom Rewrites Regional Trade
China’s ability to capitalize on the Middle East supply disruption reflects a structural transformation that has been years in the making. Massive investments in integrated petrochemical complexes between 2023 and 2025 have fundamentally altered the country’s SM balance, shifting it from one of the world’s largest import-dependent markets into a major export hub capable of responding quickly to regional supply shortages.
The change is evident in China’s import data. In January-May 2026, the country imported just 17,863 mt of SM, an 81.5% decline from 96,616 mt during the same period a year earlier, according to GTT data. The sharp contraction illustrates how rapidly domestic capacity additions have displaced imports, allowing local producers not only to satisfy domestic demand but also to compete aggressively in international markets.
This transition proved particularly significant when Middle Eastern exports collapsed. Rather than entering the spot market to compete for replacement cargoes, Chinese producers were able to redirect surplus production towards overseas buyers, transforming the country into the principal supplier of prompt SM cargoes across Asia.
Export prices quickly reflected the tightening regional supply balance. The midpoint of the OPIS FOB China SM assessment climbed from $990/mt on Feb. 27 to a peak of $1,485/mt by March 30 as the first wave of geopolitical disruption reverberated through global markets. Although values retreated to $950/mt FOB China by early July following a temporary easing in energy prices, renewed tensions surrounding the Strait of Hormuz reignited buying interest, lifting the assessment to $1,147.50/mt by July 17.
The rebound highlighted China’s growing influence over regional pricing. Whereas Middle Eastern producers had traditionally acted as the marginal suppliers into Asia, Chinese exporters increasingly became the market participants determining spot availability and export premiums.
India turns decisively to China
No country illustrated this shift more clearly than India. Historically, Indian SM buyers relied heavily on cargoes originating from Saudi Arabia, Kuwait and the United Arab Emirates, supplemented by imports from South Korea and Southeast Asia. Chinese cargoes rarely featured prominently because freight economics and import duties generally favoured suppliers located closer to India’s western coastline.
The Strait of Hormuz disruption rapidly overturned that long-established procurement pattern. As Gulf producers struggled to maintain export programs amid escalating shipping risks, Indian importers were forced to diversify sourcing almost overnight. With domestic SM consumption remaining relatively resilient and downstream manufacturers requiring uninterrupted feedstock supplies, China emerged as the only regional producer capable of supplying substantial prompt volumes within commercially acceptable delivery windows.
Import statistics demonstrate the speed of this transition. According to GTT data, India’s SM imports from China increased from only 3,992 mt in January to 12,001 mt in February before accelerating to 22,346 mt in March. Shipments then surged to 80,201 mt in April and remained elevated at 59,772 mt in May, representing the strongest monthly arrivals from China in recent years.
Demand strengthened further in July as renewed military escalation once again threatened shipping through the Strait of Hormuz. Market participants reported approximately 21,000 mt of August-loading cargoes concluded at around $1,130/mt FOB China and $20/mt premiums to the weekly FOB China average. The transactions followed an earlier series of deals totaling about 100,000 mt for June loading, underscoring the scale at which Indian buyers had shifted procurement towards Chinese suppliers.
For Chinese producers, the resurgence in Indian demand provide a timely outlet for surplus material at a time when domestic downstream consumption remained sluggish, helping support FOB China prices despite cautious buying within the local market.
Regional outages amplify China’s role
China’s export expansion has been further reinforced by an unusual convergence of production outages across Southeast Asia.
Singapore’s Aster Chemicals continues to operate only its smaller 350,000 mt/year SM unit, while its larger 550,000 mt/year facility remains offline. With production initially curtailed because of poor economics, the outage was subsequently extended after feedstock disruptions limited benzene availability, reducing merchant SM supplies across Southeast Asia. Meanwhile, Malaysia’s Idemitsu SM has completed maintenance that had resulted in an estimated production loss of approximately 29,000 mt, according to Chemical Market Analytics estimates.
The reduction in Southeast Asian availability coincided almost perfectly with the disappearance of Middle Eastern exports, leaving buyers with few alternatives outside China.
Chinese exporters also expanded well beyond their traditional customer base. According to GTT data, China’s SM exports climbed from 54,163 mt in February to 84,470 mt in March before more than doubling to 195,383 mt in April. Exports remained elevated at 189,862 mt in May, confirming China’s emergence as the region’s dominant marginal supplier.
Perhaps more striking than the increase in export volumes was the diversification of destinations.
Turkey imported approximately 81,350 mt of Chinese SM during the disruption, while the Netherlands received 17,555 mt—trade flows that would have been considered highly unusual only a year earlier. These shipments illustrate how rapidly buyers adjusted procurement strategies as traditional Middle Eastern supply chains became increasingly unreliable.
Even markets that have historically maintained relatively balanced domestic supply-demand fundamentals have temporarily turned to Chinese material. Indonesia imported around 6,190 mt of Chinese SM during April and May after reduced operating rates at Styrindo Mono Indonesia created a short-term supply deficit following upstream force majeure declarations. Taiwan, China also imported 15,204 mt over the same period as several domestic producers underwent maintenance or reduced operating rates because of feedstock shortages.
Japan, traditionally a net exporter of SM into China, experienced perhaps the most symbolic reversal. Between March and May, Japanese buyers imported approximately 21,002 mt of Chinese SM after domestic refiners reduced operating rates amid constrained naphtha availability. Before the Middle East disruption, Japan had exported more than 64,000 mt of SM to China between June 2025 and February 2026, GTT data shows. The reversal highlighted not only the severity of regional feedstock shortages but also China’s growing importance as a balancing supplier capable of filling temporary deficits across Northeast Asia.
Collectively, these shifts represent more than a temporary arbitrage opportunity. They signal a structural reordering of global SM trade, with Chinese producers increasingly assuming the role once occupied by Middle Eastern exporters, according to market sources.
—Reporting by Hazel Kumari, hkumari@opisnet.com; Editing by Mei-Hwen Wong, mwong@opisnet.com