North Sea crude fell 10.7% MoM as ceasefire and deal-progress signals unwound the Hormuz-conflict premium, with Dated Brent averaging $107.54/bbl vs April's $120.42/bbl. The story split in two: three weeks of grinding recovery to a W3 peak of $111.67/bbl, then a sharp W4 sell-off of -11.5% WoW that accelerated into the month-end close of $93.37/bbl - the monthly low.
The mechanism was prompt supply easing: Atlantic Basin export volumes filling the replacement-barrel role that had driven April's physical scarcity, most visible in grade diffs collapsing 63-87% MoM across all seven North Sea grades. The curve confirmed the shift - bear steepening with M1-M2 backwardation compressing from $6.61/bbl to near-flat by month-end. In the window, Mercuria's role reversal from dominant buyer in April (60 cash BFOE trades) to dominant seller in May (37 trades) is the clearest signal that intermediary length accumulated at April's highs is being redistributed into the sell-off.
Price Trends
Dated Brent averaged $107.54/bbl, -10.7% MoM; W4 sell-off accelerated to close at the monthly low of $93.37/bbl.
- Dated Brent avg $107.54/bbl vs April's $120.42/bbl (-$12.88/bbl, -10.7% MoM); YoY +$39.79/bbl (+58.8%) vs May 2025; monthly high $117.36/bbl, monthly low $93.37/bbl (May 29 close), intra-month range $23.99/bbl vs April's $54/bbl.
- W4 close at $93.37/bbl confirms the sell-off accelerated through the final week rather than plateauing; the month-end print is the lowest level since before the conflict escalation.
Cross-Market Dynamics
Grade diffs collapsed 63-87% MoM; Forties and WTI Midland near parity with strip.
- All seven grade diffs vs Prompt Strip fell sharply and uniformly — no grade held its premium — consistent with broad Atlantic Basin supply return rather than grade-specific shift.
- Forties and WTI Midland at near-zero monthly avg diffs ($2.19 and $1.50/bbl) signals the Atlantic Basin replacement-barrel premium has fully unwound; Glencore offered WTI Midland at $2.20-2.50/bbl on May 29 with no takers, consistent with buyer reluctance at these levels.
- EFS (Brent vs Dubai) compressed sharply on May 29 to $6.65/bbl vs monthly avg $11.14/bbl, signalling East-West flow economics deteriorating into month-end as flat price fell faster than the Dubai leg.
Market Activity
Mercuria flipped from top buyer to top seller; Troll cargo traded on the final day as physical cargo activity picked up.
- Cash BFOE (GT0002215): 89 trades across the month vs 93 in April; bid/offer balance shifted from heavily skewed (54 bids, 3 offers in April) to near-balanced (23/21), signalling a return to two-way price discovery; May 29 saw 5 further trades all with Mercuria buying from PetroIneos and Glencore at $90.57-90.60/bbl.
- Mercuria role reversal: dominant buyer in April (60 trades) to dominant seller across most of May (37 trades), with a notable return to buying on May 29 (5 trades); Vitol SA led overall May buying (37 trades), followed by Shell (14) and PetroIneos (11).
- PetroIneos remained the largest seller across both months (52 April, 33 May), consistent with sustained upstream length clearance; Glencore also selling heavily into May 29's cash window.
- Physical cargo: 21 completed trades across the full month; Troll FOB traded on May 29 (Eni buying from Phillips 66 at $3.75/bbl vs Strip, 700,000 bbl) — first Troll cargo trade of the month; WTI Midland FOB dominated with 16 trades, with Glencore offering two further cargoes at $2.20-2.50/bbl on May 29 without finding buyers.
- CFDs (GT0002219): 7 additional trades on May 29 with Trafigura the dominant buyer (3 trades from Glencore and Phillips 66 at $1.90-2.30/bbl); 35 bids vs 25 offers in the final session, bid-heavy into month-end consistent with roll demand as the prompt expires.
Curve Structure
Bear steepening; M1-M2 compressed sharply through May, approaching flat at month-end.
- Bear steepening: M1 fell $13.89/bbl open-to-close vs M3 -$5.27/bbl; the front led the sell-off 2.6x, mirroring April's bull steepening in reverse.
- May 29 BFOE forward: M2 $90.60/bbl, M3 $89.38/bbl, M2-M3 spread $1.22/bbl; with Dated Brent closing at $93.37/bbl, the Dated-M2 premium has compressed to near $2.77/bbl from $15.43/bbl at month-open - approaching flat and signalling prompt physical premium has nearly fully unwound.
- A flip to Dated below M2 would signal prompt oversupply and activate storage economics.
Price Volatility
CV halved to 5.4% - normalising but still 2.7x pre-conflict baseline.
- CV trajectory March (13-15%) → April (8-10%) → May (5.3-5.7%); pre-crisis baseline was 1.5-2%, so hedging models remain materially under provisioned at current levels.
Something to Watch
- Dated vs BFOE M2 as the oversupply signal: compressed from $15.43/bbl at month-open to ~$2.77/bbl at May 29 close; a flip below zero signals prompt barrels are trading at a discount to forward, activating storage economics and likely triggering a further leg lower in flat price. Monitor: daily Dated-M2 spread; BFOE loading nominations for July.
- Grade diffs as the Atlantic Basin absorption gauge: Forties and WTI Midland monthly avgs at $2.19 and $1.50/bbl vs Strip, with Glencore unable to place WTI Midland at $2.20-2.50/bbl on May 29; compression below $1/bbl signals structural re-pricing beyond the conflict shock. Monitor: daily Forties and WTI Midland diff; Atlantic Basin export volumes.
- Hormuz reopening timeline as the binary reset: the curve has priced near-complete normalisation into month-end; any re-escalation unwinds that rapidly and sends grade diffs back toward April levels. Monitor: daily Gulf transit count; June BFOE loading nominations.
Note: All figures, prices and market activity referenced in this report are based on the period 1 to 29 May 2026 (20 trading days).
