Five lower closes running, 130.80 down to 114.89 - the longest run of selling since the week the Islamabad Memorandum was signed, and the first with no de-escalation anywhere in it.
Brent has closed lower five sessions running, from 130.80 on 15 September to 114.89 on 22 September, a 12.2 percent give-back. The crisis has produced four runs of selling that long or longer in its 142 trading days, and the first three each had a de-escalation sitting inside them: Trump pausing Project Freedom on 5 May citing great progress toward a deal, his promise to lift the blockade on 29 May, and the six sessions of 11-18 June that carried the Islamabad Memorandum. This one has the reverse. The only Hormuz diplomacy anywhere in the window is the speaker of Iran's parliament saying on 20 September that there will be no talks and no reopening until Washington meets Tehran's terms.
The high the slide started from was set by a mine. At 20:26 UTC on 14 September, after the London assessment, the IRGC Navy said a supertanker had exploded on naval mines south of the strait. The first close that could have priced it, 15 September, rose 7.9 percent to 130.80 - the second-highest close of the crisis, behind only 7 April. Brent is now below every close since 9 September. The market has handed back the explosion and the week that led up to it.
Nothing in the strait got easier while it did that. This site's own transit count put 22 vessels and 0.39 million tonnes of capacity through Hormuz in the week of 14-20 September, against 37 vessels and 0.74 Mt the week before: the traffic halved in the week the price broke. A crisis week has averaged 48.5 vessels. In the year before the crisis the strait moved about 85 vessels a day.
What the sellers are actually pricing is not in this data, and the most obvious candidate is not Iranian at all. Tehran's wire attributed the 14 September climb to a Saudi pipeline shutdown as much as to Hormuz, and a pipeline restarting takes crude down without anything changing at the strait. This site's own test does not close the gap either: days carrying Iranian statements are statistically indistinguishable from quiet days in the next close's move, a null result at p=0.67. So the claim here is narrow, and it is a negative. Whatever is selling crude, it is not a Hormuz that improved.
Five new official closes landed today, filling in the week that was still missing when this site last measured the rally at 42 percent on a strait that had stopped changing. Every one of the five is lower, and the give-back has the same property the run-up had: no Hormuz news underneath it. The day after the last of them, the Supreme National Security Council put the price of a reopening at seven conditions. Through the spring a slide this long meant an announcement was coming. A reader still watching the oil price for the first sign the strait is reopening should watch the ship count instead.
Data series · 2026-09-22 Brent official closes: five consecutive lower closes, 130.80 on 15 Sep to 114.89 on 22 Sep, -12.2 percent
Data series · 2026-09-20 Hormuz transit count: 22 vessels and 0.39 Mt in the week of 14-20 Sep, against 37 vessels and 0.74 Mt the week before
Iranian statement · 2026-09-14 IRGC Navy: supertanker exploded after striking naval mines south of the Strait of Hormuz source
Iranian statement · 2026-09-14 Tasnim: oil prices climb above 3 percent as a Saudi pipeline shutdown deepens supply concerns source
Iranian statement · 2026-09-20 Parliament speaker Qalibaf: no talks with the US and no reopening of Hormuz until Iran's conditions are met source
Iranian statement · 2026-09-23 Security council secretary: Iran will not negotiate or reopen Hormuz until Washington meets seven conditions source
Event · 2026-06-17 Trump and Pezeshkian sign the Islamabad Memorandum ending the war and the blockades
Event · 2026-05-05 Trump pauses Project Freedom, citing great progress toward an Iran deal
Computed, not asserted — every number here is derived from public data: official EIA Brent closes via FRED, IMF PortWatch transit counts, Polymarket and Kalshi odds, and source-linked curated events. Method and caveats · Atom feed · llms.txt
https://chokepointdata.com/analysis/2026-09-24-slide-without-a-deal/