SUMMARY
NWE CIF naphtha averaged $844/MT, up 13% MoM and 50% YoY, but crude drove the rally, not naphtha. After Saudi Arabia shut the East-West pipeline on 10-Sep, Dated Brent rose 28% to a $116.80/bbl average and the Dated crack collapsed from -$7/bbl to -$22/bbl. The implied Dated premium over futures rose from $3/bbl to $14/bbl, so naphtha kept pace with paper Brent but not with physical barrels. 14-Sep was a single market-wide inflection, with the naphtha high, the Brent spike, the LVN (Light Virgin Naphtha) jump and the peak East-West spread all on that day. The curve bull steepened at the back while M1-M2 narrowed for a second month. A Yanbu restart unwinds the Dated premium first; a narrowing propane discount points to crackers turning back to naphtha in Q4.
PRICE ACTION

- CIF opened at $789.00/MT (1-Sep), closed at $842.00/MT (30-Sep) and averaged $843.92/MT, against $746.01/MT in August (+13.1%) and $562.48/MT in Sep-25 (+50.0% YoY).
- High of $886.00/MT on 14-Sep. The range of $97.25/MT was narrower than August's $123.00/MT
- Largest daily gain: +$26.50/MT on 10-Sep, the day the pipeline shut. Largest daily loss: -$30.00/MT on 25-Sep, after Iran's offer at the UN to reopen Hormuz.
- Prices retreated rather than plateauing as Hormuz transits recovered (116 to 132, week of 21-27 Sep).
CROSS-MARKET DYNAMICS
- Dated Brent averaged $116.80/bbl (+28.4%) and reached $130.65/bbl on 14-Sep (+$12.09 on the day). The closure removed 3-5 mb/d of Hormuz bypass capacity, and refiners bid for prompt physical crude.
- The Dated crack averaged -$21.97/bbl (Aug -$7.12), while the Futures crack moved only to -$7.48/bbl (Aug -$4.02). The gap implies a Dated premium over futures of $14.49/bbl, against $3.10/bbl in August
CROSS-COMMODITY DYNAMICS

- On 14-Sep LVN rose $23/MT and Raffinate $19/MT, while N+A Heavy held within ±$6/MT
- The butane/naphtha ratio rose from 0.805 to 0.921 as LPG got more expensive into winter, shrinking the incentive for flexible crackers to switch away from naphtha.
MARKET ACTIVITY
- 115 bids, 36 offers and 5 trades (August: 106, 41, 6). The bid:offer ratio rose from 2.59:1 and the hit rate fell from 4.1%: the spread stayed wide and was not clearing.
- Four of the five trades were between trading houses and integrated-major trading arms (+$12 to +$22/MT diffs): relative-value positioning. The fifth (3-Sep, 32,000 MT at +$7/MT) was a producer trading arm selling, and that seller was new on the offer side
- The petrochemical consumer bid again with no completed trades: its coverage is not clearing, which fits squeezed cracker margins.
CROSS-REGIONAL DYNAMICS
- The East-West spread averaged +$59.38/MT (Aug +$40.47). With Saudi crude no longer moving via the Red Sea, Asian importers were hit first and pulled harder on Atlantic Basin naphtha
- It closed at +$42.63/MT, below August's month-end +$64.75/MT, as transits recovered
CURVE STRUCTURE

- M1 (Oct-26) gained $58.25/MT vs M12 +$35.00/MT (1.7x, against 2.5x in August). Still priced as temporary, but losing force
- M2 gained more than M1 (+$62.25/MT). M1-M2 fell from $38.50/MT (11-Sep) to $20.50/MT (29-Sep), so prompt length is building under a steep curve
PRICE VOLATILITY

SOMETHING TO WATCH
- Dated premium over futures:
- Observation: implied at $14.49/bbl (Aug $3.10)
- Why it matters: a pipeline restart narrows it first, lifting the Dated crack even if flat price falls
- What to monitor: Yanbu loadings; the gap between the GX0011244 and GX0000630 cracks
- M1-M2 as a gauge of prompt length:
- Observation: second consecutive monthly narrowing, to $24.00/MT
- Why it matters: a break below $20.50/MT confirms prompt length under a backwardated curve
- What to monitor: weekly close of GX0000615
- Feedstock switching:
- Observation: propane discount at -$164.39/MT, $53.20 narrower
- Why it matters: further narrowing moves flexible crackers back to naphtha in Q4
- What to monitor: GX0000736; butane ratio (GX0000749) above 0.92
Note: All figures, prices and market activity referenced in this report are based on the period covered by this monthly update.

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