# Paraxylene: Cycles

How a building boom squeezed margins for six years

Source page: https://www.materialinsights.org/chemicals/paraxylene/cycles/

What this tab covers How its prices and margins move: past booms and busts with price levels, the spread or margin that the industry watches, the drivers of the cycle and the metrics to track.

PX margins follow two waves: refinery capacity additions in Asia and polyester demand. A building boom in 2017-2019 (Hengli, ZPC) pushed the PX-naphtha spread down from $462/t in 2018 to $283/t by 2024 (Argus). The floor is set when Japanese, Korean and US units close; the ceiling when PTA and polyester run hard and refiners cannot add PX fast. Crude moves the absolute price: PX was below $800/t in November 2024 but about $1,283/t in October 2026, with Brent above $100/bbl after renewed attacks around Hormuz.
 The spread to watch **PX minus naphtha (CFR Taiwan/China minus CFR Japan)**

Shows the aromatics complex margin. $462/t in 2018, $383/t in 2019, $283/t in 2024 (Argus). A second spread, PTA minus 0.655 x PX, shows how margin is shared with PTA makers.

#### Booms and busts

1. 2018-2019

Hengli and ZPC started multi-Mt PX units as part of China's push to self-sufficiency. The wide spreads that funded them began to close.

PX-naphtha spread $462/t in 2018 and $383/t in 2019 (Argus)

2. Late 2024

New PTA and PX capacity met weak polyester demand. Chinese PTA margins went below breakeven and mixed xylene stocks rose 75% in a month.

Asian PX below $800/t in mid-November 2024, a multi-year low; PTA margin about $40/t (Argus, Mar 2025)

3. 2026

The near-closure of Hormuz from 28 February cut naphtha and crude supply to Asia. PX rose with crude, and Chinese maintenance tightened supply in October.

$999.33/t CFR Taiwan/China on 2 Mar 2026 (S&P Global); about $1,283/t on 7 Oct 2026 (Procurement Resource)

#### What drives the cycle

- **Chinese capacity additions.** China reached close to 47 Mt/yr by 2024; each new megacomplex cuts imports from Korea and Japan.
- **Polyester demand.** Textiles and bottles drive PTA runs; Chinese PTA ran at about 70-71% in October 2026 (Procurement Resource).
- **Crude and naphtha.** Set the absolute price; the 2026 Gulf disruption lifted costs across Asia.
- **Gasoline blending value of xylenes.** When US gasoline is strong, mixed xylenes go to the blending pool, tightening PX feed.
- **Rationalisation.** 3.92 Mt/yr closed in 2019-2025 (Argus), mainly in Korea, China, Japan and the US.

#### Metrics to track

| Metric | Why it matters | Where to track it |
|---|---|---|
| **PX-naphtha spread** | Margin signal | Argus, Platts |
| **China PX imports (monthly)** | Demand for Korean, Japanese and Indian exports | GACC via Mysteel |
| **China PX and PTA operating rates** | Supply and demand balance | Mysteel, CCF, Procurement Resource |
| **ZCE PX futures** | Daily price discovery in yuan | Zhengzhou Commodity Exchange |

## Other sections

- [Summary](https://www.materialinsights.org/chemicals/paraxylene/index.md)
- [Overview](https://www.materialinsights.org/chemicals/paraxylene/overview/index.md)
- [Correlation](https://www.materialinsights.org/chemicals/paraxylene/correlation/index.md)
- [Production route](https://www.materialinsights.org/chemicals/paraxylene/routes/index.md)
- [Production](https://www.materialinsights.org/chemicals/paraxylene/production/index.md)
- [Feedstocks](https://www.materialinsights.org/chemicals/paraxylene/feedstocks/index.md)
- [Trading](https://www.materialinsights.org/chemicals/paraxylene/trading/index.md)
- [Movement](https://www.materialinsights.org/chemicals/paraxylene/movement/index.md)
- [Regulation](https://www.materialinsights.org/chemicals/paraxylene/regulation/index.md)
- [Characteristics](https://www.materialinsights.org/chemicals/paraxylene/characteristics/index.md)
- [Emissions](https://www.materialinsights.org/chemicals/paraxylene/emissions/index.md)
- [Relationships](https://www.materialinsights.org/chemicals/paraxylene/links/index.md)