June Pricing Analysis - European LPG

European LPG extended the post-war unwind through June as the US-Iran memorandum and the reopening of Strait of Hormuz transit restored Middle East flows and pulled Brent from roughly $93/bbl (end-May) to $72/bbl (end-June, lowest since 27-Feb). Propane CIF NWE fell from $627/mt (open) to $479.25/mt (close), averaging $550.40/mt (-11.8% MoM, +16.7% YoY); butane fell harder, from $676.50/mt to $525.75/mt, averaging $586.40/mt (-25.4% MoM). The dominant move was the collapse of butane’s anomalous spring premium over propane, the prop-but spread compressing from -$162/mt (May avg) to -$36/mt as the war scramble unwound and summer-grade gasoline specifications kept butane out of the blending pool. Propane held its cracker-feedstock advantage, its discount to naphtha narrowing from -$253 to -$136/mt only because crude-linked naphtha fell faster. Prompt supply fear drained from the structure: the propane swap M1-M2 flipped from +$7/mt backwardation to -$1.5/mt contango and the physical premium to swaps eroded to zero by month-end. With Gulf flows still normalizing, the curve and the prop-but spread are the signals for whether the easing extends or stalls.

Price Action

• Propane CIF NWE (Prompt) opened $627/mt (01-Jun), closed $479.25/mt (29-Jun), avg $550.40/mt vs May’s $624.05/mt (-11.8% MoM, +16.7% YoY); the decline tracked Brent’s slide from ~$93 to ~$72/bbl as US-Iran MoU progress reopened Hormuz transit and restored Gulf exports toward 75% of prewar.
• Butane CIF NWE (Prompt) opened $676.50/mt, closed $525.75/mt, avg $586.40/mt (-25.4% MoM, +24.3% YoY); butane fell hardest as its spring premium over propane unwound.
• Propane high $627/mt was the 01-Jun open, low $456/mt (26-Jun), intra-month range $171/mt; butane high $676.50/mt (01-Jun), low $505.25/mt (24-Jun), range $171.25/mt.
• W3 (week of 15-Jun) was the breakdown: propane -13.3% WoW, butane -10.3% WoW, coinciding with the ~$17/bbl four-session Brent slide on the MoU; W4 extended (propane -8.8%, butane -6.2%) before both flattened into month-end.
• Largest single-day fall for both on 24-Jun: propane -$40.50/mt ($497.75 to $457.25), butane -$43.25/mt ($548.50 to $505.25).
• Month-end flattening at the lows, not a bounce, signals the market treating the post-war range as the floor rather than a level to fade.

Cross-Market Dynamics

• Prop-but spread compressed from -$162.30/mt (May avg) to -$36.00/mt (June avg), month-end -$46.50/mt; the May premium was an anomaly built during the war scramble, and its mean reversion drove butane’s -25.4% MoM underperformance.
• Summer-grade gasoline specifications keep high-RVP butane out of the blending pool through summer, removing a seasonal source of butane demand and compounding the premium unwind.
• Propane-naphtha (Prompt) narrowed from -$253.17/mt (May avg) to -$136.20/mt (June avg); the narrowing reflects naphtha, more directly crude-linked, falling faster, not propane strength.
• Propane retained its LPG-cracking advantage: at a discount this wide (well beyond the ~-$60/mt switching threshold), flexible European crackers continue to maximise propane over naphtha.
• Butane-naphtha widened from -$90.87/mt (May avg) to -$100.20/mt (June avg), month-end -$128/mt (widest of the month, 29-Jun); butane underperformed both propane and naphtha, isolating it as the weakest leg of the complex.

Cross-Regional Dynamics

• NWE CIF propane ($550.40/mt June avg) sat second-cheapest of the four hubs, above only US Mont Belvieu ($393.13/mt) and below Middle East CP ($621.99/mt) and Far East CFR ($640.94/mt); NWE fell 11.8% MoM, less than CP (-12.2%) and FE (-19.3%) but more than MB (-7.9%), as the Hormuz-premium unwind hit the most supply-exposed hubs hardest.
• NWE held a wide premium over Mont Belvieu (NWE - MB +$196.97/mt May avg, +$157.27/mt June avg, +$113.17/mt month-end); the transatlantic arb compressed but stayed open, with the US the cheapest global source funding European imports even as the premium narrowed toward VLGC freight.
• NWE’s discount to the Far East narrowed sharply (NWE - FE CFR -$170.46/mt May avg to -$90.53/mt June avg, -$90.75/mt month-end); NWE outperformed FE on relative value as the Asian war premium unwound hardest.
• NWE held a structural discount to the Saudi CP (NWE - ME CP -$84.75/mt May avg, -$71.59/mt June avg, -$96.75/mt month-end), confirming the Atlantic basin as the low-price destination as abundant US supply reached Europe.
• Context for NWE supply: the East-West spread (FE - ME CP) collapsed from +$85.71/mt (May avg) to +$18.95/mt (June avg), inverting to -$6/mt by 29-Jun; the closed eastbound arb frees marginal Gulf barrels for the Atlantic, a bearish supply signal for NWE into July.
• Arbs are gross regional price differentials; VLGC freight is not in the GX series pulled, so breakevens are directional rather than netted.

Curve Structure

• Propane swap M1 fell $112.50/mt (591.75 to 479.25) vs M2 -$104/mt (584.75 to 480.75); the front led, flipping the curve into mild contango. Front collapse: prompt demand eased and Middle East supply returned faster than the back repriced.
• Physical-vs-swap differential held a premium through June (avg +$16.85/mt vs May’s -$1.74/mt) but eroded to zero by 29-Jun, confirming the residual early-June prompt tightness drained as Gulf cargoes flowed.
• The structure reads as supply-return, not demand collapse: the back held while the prompt cheapened.
• M1-M6 and M1-M12 are not assessed for NWE LPG; the M1-M2 propane swap is the standard curve proxy.

Price Volatility

• Propane CV jumped from 5.58% (May) to 11.05% (June), back near the April peak (13.10%); the front-concentrated selloff re-introduced the volatility May’s consolidation had suppressed.
• Butane CV eased to 8.89% (from 9.26%) but stayed well above the 2.6-3.0% Jan-Feb baseline; butane volatility has held elevated every month since the March spike.
• Hedging models calibrated to May’s sub-6% propane CV are underestimating current risk by roughly 2x; until Gulf flows fully normalise, the higher CV is the baseline.

Something To Watch

• Prop-But spread as the butane-floor signal:
  
  • Observation: prop-but at -$36/mt June avg, in from -$162 in May.
  • Why it matters: further compression toward zero or positive (propane richer than butane) confirms butane has fully shed its war premium with summer-spec demand absent; a re-widening of butane’s premium signals blending or restock demand returning.
  • What to monitor: weekly prop-but close; timing of the autumn winter-spec gasoline switchover.
• Propane swap M1-M2 as the supply-normalization gauge:
  
  • Observation: M1-M2 at -$1.5/mt contango, in from +$7 backwardation.
  • Why it matters: deeper contango confirms Middle East supply has fully returned and prompt length is building; a swing back to backwardation flags renewed Gulf-flow disruption or a demand pickup.
  • What to monitor: weekly M1-M2 close; physical-vs-swap differential (return to premium signals prompt re-tightening); Gulf transit data.
• Propane-naphtha spread as the cracker-demand canary:
  
  • Observation: propane-naphtha at -$136/mt June avg, in from -$253.
  • Why it matters: continued narrowing toward the ~-$60/mt switching threshold would erode propane’s cracking advantage and remove a source of European propane demand; sustained width below it keeps crackers on propane.
  • What to monitor: weekly propane-naphtha close; European cracker feedstock-switching signals.

Note: All figures, prices and market activity referenced in this report are based on the period 1 – 29 June 2026.