Saudi Arabia shuts its Hormuz bypass, declines to retaliate, and the oil price falls

The Saudi Ministry of Foreign Affairs said on Friday 11 September that the East–West Crude Oil Pipeline — Petroline, a 1,200km line running from the Eastern Province to the Red Sea — had been targeted in the Riyadh and Medina areas by “several drones originating from Iraq”, causing injuries and material damage, and expressed its “strongest condemnation”. The Ministry of Energy shut the line as a “precautionary measure”, Al Jazeera reported. No group has claimed responsibility. Planet Labs imagery from 11 September, distributed via Reuters and AFP, shows a damaged site southeast of Medina on the pipeline route; NASA FIRMS recorded multiple large thermal anomalies nearby and Sentinel-3 caught a black smoke plume across western Saudi Arabia, according to OilPrice.com. CNN, citing two US officials, reported multiple pumping stations hit. Haaretz’s live blog rendered the Saudi statement as “launched from Iran”; the weight of reporting, and Baghdad’s own response, says Iraq.

Baghdad condemned the attack and dismissed the military commander who led operations in Maysan province, the militia-dense governorate on the Iranian border — an implicit admission of geography. Iraq also closed the Shalamcheh crossing with Iran, Reuters reported, citing two unnamed security sources. And then the most consequential line of the week, carried by Reuters via Haaretz: the Saudi foreign ministry said it would not retaliate at this stage, following a request from the Iraqi prime minister. Markets read the day as de-escalation. Brent settled just above $104, down roughly 3 per cent, on Trading Economics' continuous series, which attributes the fall to three drivers: Iranian state media saying Tehran would meet Gulf states in Oman, with GCC diplomats expected to sit down with their Iranian counterpart on Monday 14 September on a temporary arrangement for Hormuz shipping; an EIA forecast of 14.3 million bpd of US crude production in 2027; and an IEA demand outlook cut that the same note puts at a 2.5 million bpd contraction in 2026.

Precision is not available here and should not be faked. Reported settlements for the day range from $104.26 (Forbes Advisor) to $104.61 (PSU Connect, which is datelined “Friday, September 12” — 12 September is a Saturday), with percentage moves quoted between 2.81 and 4.24 per cent depending on the window measured. The trend numbers are less contested: Brent up 17.35 per cent on the month and 55.87 per cent year on year, on a CFD proxy rather than the ICE front-month settlement. Against that, the EIA’s September Short-Term Energy Outlook has global prices averaging $91/b in August and forecasts Brent near $90/b for the second half of 2026 — below spot — on an assumption that Middle East exports increasingly move by “alternative routes”. That outlook was published before the alternative route was shut.

Assessment: Two things happened on Friday that markets chose to net against each other, and only one of them is reversible. A pipeline can be repaired; a demonstrated willingness to absorb a strike on the primary export lifeline without answering it cannot be unsaid. Riyadh has effectively subcontracted its response to Baghdad’s ability to police Maysan — a bet with no historical record of success. Treat the 2.5 million bpd demand-contraction figure as unverified until the IEA’s own report is read; it would be destruction on a scale not seen outside 2020, and it is doing a great deal of work in explaining why the worst supply news of the war produced a down day.