Lotte Chemical told customers it will pause a scheduled Yeosu cracker maintenance window after naphtha crack spreads widened on Middle East supply anxiety, keeping ethylene output online while rivals debate whether to run plants at a loss. The decision lands on the first full day of South Korea’s Hangul Day cash-market holiday, when petrochemical traders cannot hedge exposure on the Kospi but can still watch Singapore naphtha swaps move overnight.
Company officials said the turnaround team will hold at “hot standby” until crack spreads stabilize or until export customers accept revised formula premiums for October cargoes. Yeosu accounts for a double-digit share of domestic ethylene capacity; even a two-week delay ripples through downstream PVC and ABS buyers in Ulsan and Daesan.
Why spreads moved
Refining desks linked the move to Brent holding above $103 and to freight insurers quoting wider war-risk premiums on Strait of Hormuz lanes. Korean refiners SK Innovation and S-Oil have not announced run cuts, but trade ministry officials said they asked majors to disclose hedge positions at next week’s National Assembly panel hearing.
Lotte’s note to clients, seen by InfoHandle Network, cited “unacceptable margin compression” if maintenance coincided with a spike in feedstock costs. Analysts at two brokerages said the choice favors cash flow over reliability metrics, a trade-off investors will scrutinize when chemical names reopen Tuesday.
Customer impact
Domestic converters that buy on formula contracts expected lower ethylene costs after a soft patch in September. Instead, several midtier plastics makers said they will draw down inventory through the long weekend and renegotiate December arrivals. Export-oriented film producers in Gyeonggi warned that delayed maintenance could tighten supply just as Chinese buyers return from their own holiday calendar.
Shipping agents at Yeosu port reported normal berth traffic Friday morning, with naphtha import cargoes still discharging under existing schedules. The uncertainty is pricing, not barrels stuck offshore — at least for now.
Assembly politics
The Trade, Industry and Energy Committee scheduled refiner testimony for Monday on naphtha hedge disclosures, a separate but related fight. Lotte is not on that witness list, yet its maintenance call gives opposition lawmakers a fresh example of how oil shocks pass through to factory costs even when equity markets are closed.
For plant managers in Yeosu, the message is blunt: keep crackers running while spreads pay, and postpone the safety work until the margin math improves. Regulators will ask whether that sequencing still meets internal risk guidelines once auditors return from the holiday.