Brent Crude settled near $123 on Thursday 30 April, the new wartime settle high1. The benchmark jumped $14.84 in two trading days from $111.16 on Day 60, touching $126 intraday and matching the 22 March wartime peak. The driver was the UAE's withdrawal from OPEC and OPEC+, announced on 28 April, taking formal effect Friday 1 May.
The UAE's 5 million barrels per day of capacity moves outside OPEC+ quota discipline tomorrow morning. That is roughly 5% of global oil supply leaving the coordinated production framework that has anchored crude since the cartel's 1960 founding2. The bloc has historically held by inertia rather than enforcement; its only material disciplinary instrument is bilateral pressure between Riyadh and Abu Dhabi. After the 29 December 2025 Saudi airstrike on an Emirati weapons convoy at Mukalla port in Yemen, the first kinetic exchange between nominal GCC (Gulf Cooperation Council) allies in the bloc's history, that channel is dead. The OPEC exit is not the rupture; it is the institutional formalisation of one that began with an airstrike four months ago. Markets are pricing the consequence ahead of the calendar.
The structural question for Friday's session is whether Saudi Arabia competes on volume or holds. A unilateral production lift would tank prices below the $87/bbl Saudi budget breakeven, which Riyadh has avoided since 2024. Holding lets the UAE eat its market share without the risk premium being priced out. Brent at $123 sits 87% above the $67.41 pre-war baseline; a UAE volume surge against a Saudi hold would price out the war premium fast, while a Saudi response would price out OPEC+ entirely. Either path produces a violent move; the first session on Friday is the price discovery.
For UK drivers the translation is roughly 35-40 pence above pre-war pump prices once refinery margins clear, with haulage, food and electricity bills following inside a fortnight. Xinhua and People's Daily running the UAE announcement above the fold reads as Beijing broadcasting a narrative in which Gulf cohesion has collapsed and Riyadh is exposed; Saudi state outlets burying the same story closed the loop from the other side. Aramco's cohesion thesis since the 2024 production-cut renegotiation has rested on the assumption that intra-Gulf disputes stay diplomatic. Mukalla broke that assumption in December; the OPEC exit prices it.
