Outright Dubai crude prices edged lower by $2.45/bbl to $103.29/bbl MoM as of 29 May, weighed down by expectations that US-Iran negotiations would lead to a quick Hormuz reopening. The W1-W3 grind higher to $107.89/bbl gave way to a sharp W4 sell-off of -5.7% WoW as ceasefire optimism intensified, with the Trump-Xi Beijing summit producing no formal resolution.
The Brent-Dubai EFS collapsed from April's all-time high of $20.81/bbl to $6.65/bbl, driving broad-based Asian refiner diversion into non-Middle East grades and capping Dubai upside; Murban bore the brunt of the light sweet sell-off, closing at -$11.35/bbl vs Dubai. With the conflict entering its fourth month, Asian refiners are expected to continue prioritising Atlantic Basin purchases in June, keeping Dubai around $100/bbl.
Market Activity
- 74 total partials traded, yet only one Oman convergence was observed on 21 May (BP sold to Vitol, Jul-26 loading); the stark divergence between partial activity and physical settlement suggests market participants were reluctant to take on physical delivery risk amid ongoing uncertainty over Gulf loadings and vessel transit under war conditions.
- Vitol dominated the buy side with 43 partials (58% of total), sourcing from BP (22), PetroChina (18), Unipec (1), ExxonMobil (1), and Phillips 66 (2); intermediary accumulation at scale, consistent with a trading house building length into the prompt tightness signal:
- BP was two-way in the window, selling 25 partials to Vitol (22) and PetroChina (3) while buying 6 from Reliance (1) and Unipec (5); the concurrent two-way activity at the month's price peak is consistent with intermediary portfolio rebalancing, redistributing barrels across counterparties rather than expressing a directional view.
- Regime change vs April: Unipec (143 sells in April) and Shell (111 sells) replaced by PetroChina and Reliance as dominant sellers; TotalEnergies (113 buys in April) absent entirely from the buy side; the rotation confirms April's dominant intermediary flows have cleared and the market is now driven by producer/integrated major length management.
Price Action
- Open $106.00/bbl (4 May), close $103.70/bbl (29 May), monthly avg $103.29/bbl vs April's $105.74/bbl (-$2.45/bbl MoM; +62.0% YoY vs May 2025's $63.77/bbl).
- Monthly high $107.89/bbl on 18 May; monthly low $97.20/bbl on 8 May; intra-month range $10.69/bbl vs April's $29.54/bbl, range compression of 64% reflecting a market in a holding pattern rather than active price discovery amid low liquidity.
Cross-Market Dynamics
- GME Oman Futures averaged $102.00/bbl in May vs Dubai's $103.29/bbl, a -$1.29/bbl discount vs April's -$1.01/bbl; Oman opened at -$1.83/bbl and closed at -$6.38/bbl vs Dubai, the widening discount into month-end consistent with medium sour grades underperforming the Dubai prompt as ceasefire-driven selling hit the complex broadly.
- IFAD Murban Futures averaged $102.01/bbl in May vs Dubai's $103.29/bbl, a -$1.28/bbl discount broadly in line with Oman through the monthly average; however Murban's close fell sharply to $92.35/bbl (-$11.35/bbl vs Dubai's $103.70/bbl close), a far steeper sell-off than Oman's -$6.38/bbl, indicating light sweet grades bore the brunt of the W4 ceasefire-driven liquidation.
Cross-Regional Dynamics
- The breadth of non-Middle East grades buying by Asian refiners signals a structural rather than opportunistic diversion; Dubai flat price upside is capped as long as the EFS keeps Atlantic Basin economics competitive into Asia.
- Brent-Dubai EFS (GX0000585) averaged $11.14/bbl in May vs $11.50/bbl in April; the month-start at $14.59/bbl reflected residual peak Hormuz-disruption risk in Brent, compressing to $6.65/bbl by 29 May as ceasefire signals unwound the Atlantic safe-haven premium faster than Gulf physical supply constraints eased.
- The EFS compression reopened Atlantic Basin economics into Asia: WTI Midland delivered into Asia in August was trading at around July Dubai +$19-22/bbl; light sweet grades faced headwinds from the influx of competing Atlantic Basin supply.
Curve Structure
- Dubai M1-M2: opened $3.27/bbl, closed $14.39/bbl (+$11.12/bbl); the sharp widening into month-end signals aggressive prompt tightness reasserting in the physical window as ceasefire optimism faded.
- Dubai M1-M3: opened $7.23/bbl, closed $17.54/bbl (+$10.31/bbl); the front steepened consistently into month-end, with the mid-month dip reflecting W2 ceasefire-driven compression that subsequently unwound.
- Dubai M1-M6: opened $12.95/bbl, closed $7.65/bbl (-$5.30/bbl); the back end corrected further as the market priced expected gradual Hormuz normalisation into deferred months while the prompt held on near-term physical constraint; the divergence between a widening front and compressing back is consistent with a supply disruption expected to resolve rather than become structural.
Price Volatility
- May CV of 3.50% is the lowest since February 2026 (2.85%), confirming the acute shock is compressing; the market has stabilised at elevated levels rather than reverted to pre-disruption conditions.
- Risk models calibrated to the pre-disruption 1.7-2.8% CV range still underestimate current volatility by approximately 25-30%; until Hormuz flows normalise, elevated CV should be the baseline for position sizing.
Something to Watch
- With the US-Iran conflict entering its fourth month and no clear resolution timeline, the outlook for June remains uncertain; Asian refiners are likely to continue prioritising Atlantic Basin purchases, keeping Dubai around $100/bbl.
- EFS direction as the Atlantic arb signal: compression below $5/bbl accelerates Asian refiner diversion away from Middle East grades and further caps upside.
Note: All figures, prices and market activity referenced in this report are based on the period 1–29 May 2026.
