OPEC supply sinks to a 37-year low as Iran's barrels vanish, yet Brent eases

OPEC supply sinks to a 37-year low as Iran's barrels vanish, yet Brent eases A Bloomberg survey shows OPEC output at its weakest in at least 37 years after Iran lost 710,000 barrels a day, even as front-month crude slipped Friday. OPEC pumped less crude last month than at any point in at least 37 years, a Bloomberg survey published Friday (2026-06-05) showed, with Iran accounting for more than half the drop. Iranian output fell 710,000 barrels a day to 2.34 million, a five-year low, as US pressure on Tehran bit.⁵ That matters because the physical market keeps tightening while the screen looks calm. ICE Brent crude front-month traded at $93.07 on Friday (2026-06-05), down 0.53% on the day, with NYMEX WTI front-month at $90.01. The tape is not reflecting the scale of barrels that have simply disappeared from the Gulf.⁵ The losses run across the region. Kuwait pumped 490,000 barrels a day in May, down 310,000 and less than a fifth of pre-war levels, the survey showed. Saudi Arabia, the group's leader, fell 240,000 to 6.57 million.⁵ Behind the numbers sits the Strait of Hormuz. JINSA estimates Gulf producers are collectively shut in at roughly 9.1 million barrels a day with the waterway effectively closed. That is the supply the survey is now counting as gone.¹ Producers are improvising around it. Saudi Aramco ramped its cross-country pipeline to 7 million barrels a day in eight days, keeping about 60% of the kingdom's pre-war exports flowing, according to Zawya.² Aramco's trading arm and ADNOC have also pushed some cargoes through Hormuz itself since Iran largely closed it.⁵ The UAE is the exception. Its output rose 300,000 barrels a day to 2.44 million in May, bucking the regional decline. The survey excludes it: the Emirates left OPEC last month after six decades, taking the cartel's third-largest producer and nearly 5 million barrels a day of capacity with it.^5,1 Abu Dhabi is building for a post-Hormuz world. A new pipeline to double export capacity through Fujairah by 2027 is about 50% complete, ADNOC's chief said on Wednesday (2026-05-20), and he warned global flows may need at least four months to recover to 80% of pre-conflict levels once the war ends.³ The existing Habshan-Fujairah line carries up to 1.8 million barrels a day, with room to lift national output toward 6 million if pushed.² Against all this, the OPEC+ paper response looks almost beside the point. Three delegates expected key members to nudge July targets up by a modest 188,000 barrels a day at a video conference on Sunday (2026-05-31).⁵ Quota arithmetic means little when the barrels are physically stranded. The demand-side cushion is thinning too. The IEA warned on Wednesday (2026-05-13) that price-spike turmoil is far from over as depleting inventories pile pressure on the market, and Morgan Stanley sees the world losing another billion barrels over 2026 as oilfields restart, refineries repair and tankers reposition.⁴ Washington's own buffer is shrinking. The US Strategic Petroleum Reserve has fallen to 357 million barrels after fresh withdrawals.⁵ The positioning read is split. Aggregate signals lean mildly bearish on crude, yet the contrarian case on Brent is supply-driven and points the other way, and Kpler argues the market is underpricing oil risk, with crude able to hold near $90 well into 2027.⁵ The question for the desk is whether a 188,000 barrel target tweak means anything against 9.1 million barrels shut in, and how fast Hormuz reopens to commercial traffic. Watch the SPR line closely. At 357 million barrels and falling, America's room to lean against the next leg higher is running down.^5,1