Iran's Blockade of Hormuz Deepens as Oil Benchmarks Diverge on Conflicting Data

Iran's Ports and Maritime Organization said on July 12, 2026 that transit through the Strait of Hormuz is "currently not possible" due to what it called illegal US actions, according to IRNA. The statement, issued at 5:32 PM local time, is the clearest official confirmation yet that Tehran regards the waterway as closed to commercial traffic rather than merely contested.
The PGSA line followed two other IRNA dispatches earlier the same day. At 10:09 AM, the IRGC said a second vessel had been hit in the strait and that a US base in Qatar had been targeted IRNA. A separate IRNA report said Iran has taken control of the strait and vowed to maintain that control "with strength" IRNA. Taken together, the three dispatches move the narrative from disruption to declared closure, backed by military claims rather than shipping-industry inference.
That framing sits awkwardly against the tape. Brent settled at $78.93 a barrel on July 13, 2026, up 3.84% on the day but still down 5.10% over the trailing month Trading Economics. A benchmark trading in the high $70s is not consistent with a fully sealed chokepoint that normally carries roughly a fifth of global seaborne oil flows. The gap between Tehran's rhetoric and the futures curve is the story for desks pricing tail risk this week: either physical flow is continuing despite the political closure, or the market has not yet repriced for a durable stoppage.
Context for the move-lower-then-higher pattern comes from Reuters' running coverage. Iran struck three commercial vessels in the strait on July 7, and crude settled 3% higher that session before extending gains after the close Reuters. A day later, prices settled nearly 5% higher after President Trump threatened fresh strikes against Iran Reuters. By July 9, crude slid roughly 2% as inflation and demand-destruction concerns took over the tape Reuters. On July 10, Reuters described the strait as "effectively shut down," yet crude only spiked near $76 before fading Reuters. Al Jazeera's July 8 reporting had Brent above $76 for the first time in two weeks, framed as a reversal of a prior retreat to pre-war levels Al Jazeera.
The dispersion widens further back in the sourcing chain. MarketWatch's July 8 dispatch described "full-conflict conditions" in the strait with energy markets scrambling MarketWatch, while an undated MarketWatch piece put US crude back above $100 a barrel after Iran blocked two Chinese tankers, with Secretary of State Marco Rubio flagging a new worry tied to the surge. Undated pieces should be read as lower-confidence relative to dated reporting, and the $100 figure has not reappeared in the more recently dated Reuters or Trading Economics data. A March 9 MarketWatch report had Dow futures sinking more than 1,000 points on a 30% oil spike; a separate undated MarketWatch story had global crude topping $98 before erasing most of the move, with the strait "remaining closed" and OPEC+'s decision to raise output targets deemed largely irrelevant while the chokepoint stays shut. None of these figures reconcile cleanly with the July 13 Brent print near $79, underscoring how much of this narrative has been driven by episodic spikes that unwind almost as fast as they build.
The forecasting layer adds another axis of disagreement rather than resolving it. BloombergNEF's January 16 note modeled Brent averaging $55 for 2026 in a base case but flagged $91 as achievable late in the year on Iran disruption BloombergNEF. Bloomberg's own June 21 market wrap had Brent settling under $78, down about 3% that session Bloomberg. CNBC's Facebook-distributed commentary from May 20 cited analysts positing $120–$150 a barrel if the strait stays blocked, a scenario that has not materialized despite multiple closure claims since. CNBC's April 13 coverage had already flagged the strait as central to market sentiment and warned of continued "saber rattling," and BBC's April 20 reporting traced the closure back to February strikes by the US and Israel on Iran, which first sent prices spiking. NBC News reported in March that Iran's new supreme leader, Mojtaba Khamenei, vowed to keep blocking the strait as prices spiked again — a threat now echoed almost verbatim in this week's IRGC and PGSA statements.
What stands out across five months of overlapping reports is how often "closed" and "effectively shut" have been declared without a corresponding, durable move in benchmark pricing. Options desks and freight insurers have to price the strait risk on the assumption that closure claims and physical flow can diverge for days or weeks at a time. The July 12 PGSA statement is the most explicit legal-and-political closure claim to date, issued by Iran's own maritime authority rather than inferred from tanker-tracking data. Whether that translates into sustained cargo diversion around the Cape of Good Hope, insurance-market repricing, or a fresh leg higher in Brent past $80 will show up in AIS transponder data and war-risk premiums well before it shows up in another headline claiming the strait is shut.


