Polypropylene markets are in a transitional moment. The first half of 2026 was dominated by the fallout from the Strait of Hormuz closure, which sent crude oil above $99/barrel, disrupted naphtha flows into Asia, and drove Chinese PP prices from $941/mt in January to $1,456/mt by May, a 34% surge. But as the second half begins, the macro picture is shifting rapidly.
The easing of Middle East tensions has been the primary catalyst for the correction. With the Strait of Hormuz reopening to large-tonnage traffic, naphtha and propane feedstock costs have declined sharply. South Korean cracker operating rates, which had been trimmed to near 66% during the crisis, are recovering. Global polymer selling prices began to soften in late June and early July, and the trend has continued into late July.
China's polypropylene system, however, is structurally different from the rest of Asia. The country's coal-to-olefin (CTO) and propane dehydrogenation (PDH) routes were far less exposed to the Hormuz disruption than naphtha-based crackers elsewhere. Chinese CTO operators ran flat-out during the crisis, capturing improved export spreads as they filled gaps left by Middle Eastern and Korean supply. These routes remain highly competitive, with coal-based PP benefiting from low domestic coal prices and PDH units accessing US propane cargoes at advantaged pricing.
The supply outlook for H2 2026 is decisively bearish. China has 5.45 million tonnes of new PP capacity scheduled to start up in the second half of the year. If even 60% of this materializes on schedule, it would add approximately 3.3 Mt of incremental supply to a market that is already shifting from tight to balanced. The timing is critical: if Hormuz-related supply recovery coincides with the new capacity wave, the PP market could swing from tight to oversupplied in a matter of weeks.
Propylene feedstock dynamics reinforce the bearish outlook. China's aggressive PDH build-out in 2024-2025 has flooded the propylene market with incremental supply, with national propylene capacity reaching 77.6 Mt/year by end-2025 (31% of global capacity). This has depressed Asian propylene pricing and put structural downward pressure on PP production costs, particularly when crude is not spiking. April 2026 propylene in China was around $1,337/mt, but with crude easing, propylene costs are tracking lower.
Demand presents a mixed picture. Core sectors packaging, injection molding, and automotive remain generally firm. The packaging sector benefits from e-commerce growth and food service demand. Automotive lightweighting trends continue to drive substitution of PP for metals and engineering plastics. But the overall tone in China's petrochemical market softened through June, with ICIS reporting weak domestic demand as a factor in the crude-led slide of polymer prices.
Analyst views are polarized. The bear case: new capacity plus easing feedstock costs plus normalizing Middle East supply equals a $200-300/mt correction from the May peak, with PP potentially settling near $1,100-1,200/mt by Q4. The bull case: global PP inventories are still lean after the Hormuz disruption, any supply disruption or unplanned outage at a major PDH unit could spark a sharp rebound. The base case is a gradual softening toward $1,200-1,300/mt by year-end, with significant downside risk if the new capacity wave arrives on schedule.
This is the moment for PP buyers to shift from defense to offense. The Hormuz-driven rally that peaked in May is unwinding, and the convergence of easing feedstock costs, new capacity, and normalizing trade flows creates a window to lock in improved pricing for Q4 2026 and H1 2027. The first priority: renegotiate any contracts that were signed during the Q2 peak with formula pricing indexed to propylene or crude. Those formulas will deliver rapidly declining prices through Q3 as feedstock costs normalize. Shift to fixed-price quarterly contracts for H2, aiming for $1,200-1,300/mt CFR China, which is above the cost floor for most producers but below the current spot level. The second priority: build optionality into supply agreements. With 5.45 Mt of new capacity arriving, multiple producers will be fighting for market share. Demand volume flexibilities and price re-openers in new contracts. Use the leverage of multiple PDH and coal-based PP suppliers to negotiate competitive terms. The third priority: manage the timing risk. The correction will not be linear. Any new geopolitical flashpoint, a major PDH outage, or a logistical bottleneck could trigger short-term spikes. Layer purchases: cover 50% of H2 needs with fixed-price contracts, 25% with floating-price agreements indexed to propylene, and 25% spot. This structure captures the downward trend while maintaining the ability to accelerate buying on any spike. The one thing not to do: wait for the bottom. The market will find its floor around $1,100-1,200/mt if the capacity wave arrives, but catching the exact bottom is less valuable than securing supply at prices well below the Q2 peak.