Butadiene: Cycles

Why supply cannot respond to demand

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.

Butadiene is the most volatile olefin because supply is inelastic: it depends on how much naphtha is cracked, not on butadiene demand. When crackers lighten feed or cut runs, butadiene tightens; when Chinese crackers start up, it floods. The floor is roughly the value of crude C4 as cracker feed (near naphtha), the ceiling the cost of on-purpose dehydrogenation and demand destruction in rubber. Tyre demand, driven by vehicle sales and replacement cycles, sets the demand side.

The spread to watch Butadiene minus naphtha (CFR NE Asia)

Butadiene CFR China minus naphtha CFR Japan; above about $400-500/t supports extraction economics and on-purpose units (indicative). In late 2025 the spread hit a three-month low (Hellenic Shipping News).

Booms and busts

2011
US ethane cracking, strong Chinese car sales and the post-crisis rubber restock created a squeeze; natural rubber was also expensive.
CFR NE Asia butadiene peaked near $4,000/t in mid-2011 (indicative, ICIS historical)
2012-2016
Demand eased and new extraction units started; prices collapsed toward naphtha value.
fell to about $700-1,000/t by 2015-2016 (indicative)
2020
Covid shutdowns of tyre and car plants; Asian prices fell close to naphtha.
CFR NE Asia briefly below $500/t in April 2020 (indicative)
2025
Ample supply from new Chinese units and weak US demand; Asian butadiene-naphtha spread hit a three-month low in the autumn.
CFR China $1,095/t on 8 Sep 2025; prices fell $470-530/t from January to early December 2025 (S&P Global Platts)

What drives the cycle

Naphtha cracking rates and feed slate. Butadiene output falls when crackers cut rates or shift to ethane or LPG.
Tyre and car output. Synthetic rubber takes over half of butadiene; replacement tyres stabilise demand.
Natural rubber price. Natural and synthetic rubber partly substitute, so NR prices cap SBR and butadiene.
China capacity. China adds 0.5-1 Mt/yr of capacity a year and imports fell from deficit to near balance.

Metrics to track

Metric	Why it matters	Where to track it
Butadiene CFR China	Main Asian spot benchmark	S&P Global Platts, ICIS
US monthly contract price	US benchmark	Platts, ICIS
China butadiene imports	Signals Asian balance	China Customs, S&P Global
Natural rubber SGX/SHFE price	Substitution	SGX, Shanghai Futures Exchange