Benzene: Cycles

When benzene costs less than its raw material

Benzene is priced off naphtha and crude, so its absolute level follows oil. Margins are the benzene-naphtha spread, which producers need at about $150-180/t to break even. Because benzene is a co-product, supply does not fall quickly when the spread is poor; it falls when gasoline, paraxylene or ethylene economics force run cuts. The floor is set by benzene's value as a gasoline octane component and by Chinese coke-oven supply. The ceiling is set by derivative margins: when styrene and phenol producers lose money they cut runs and benzene demand drops, as in April-May 2026.

FOB Korea benzene minus CFR Japan naphtha, per tonne. Breakeven for many Asian producers is about $150-200/t. It was about $160/t in February 2026, minus $88/t on 20 March 2026, and about $109/t in April 2026 (OPIS).

Booms and busts

1. 2020

   COVID-19 cut gasoline and derivative demand. Refiners kept running for distillates and aromatics stocks rose. Asian benzene fell to its lowest level in years.

   FOB Korea benzene fell below about $400/t in April 2020 (indicative, basis: Platts and ICIS reports at the time)

2. 2024-2025

   China's capacity additions and weak styrene and phenol margins pushed benzene down. Dalian benzene futures were approved in June 2025 as prices slid.

   China benzene CNY5,375/t (about $748/t) in June 2025, down 31% since January (Yicai, Jun 2025); FOB Korea one-year high of $833.33/t on 14 Mar 2025 (S&P Global)

3. March-May 2026

   The Iran war and the near-closure of Hormuz from 28 February 2026 cut naphtha and benzene flows from the Gulf. Asian crackers cut runs. Benzene rose fast but lagged naphtha, so the spread turned negative before derivative demand weakened.

   FOB Korea $832.67/t on 2 Mar to $967.67/t on 6 Mar 2026 (S&P Global); March average $1,047/t and April $1,139/t (OPIS); naphtha CFR Japan $646/t to $1,140.50/t in three weeks to 20 Mar (OPIS)

What drives the cycle

• Crude and naphtha prices. Naphtha sets the opportunity cost. A naphtha shock, as in March 2026, lifts benzene in absolute terms but can crush margins.
• Styrene and phenol margins. About 70% of benzene goes into these two chains. When they lose money, run cuts quickly reduce benzene demand.
• Chinese capacity additions. China added 1.94 Mt in 2025 and plans 2.77 Mt in 2026 (Mysteel), cutting import needs and pressuring Korean and Japanese exporters.
• Gasoline economics. Reformer run rates follow gasoline demand and octane value; benzene output follows reformer runs.
• US-Asia arbitrage. When US prices exceed Asian by more than freight (about $80-90/t), Korean cargoes flow to the US, tightening Asia (OPIS, May 2026).

Metrics to track