Strait of Hormuz Monitor — 17 Jul 2026

READ — Openness * phase * velocity

• IS IT OPEN? A BLOCKADE IN FORCE ON IRAN'S PORTS — BUT THE SHARED CORRIDOR FLOWS — The distinction that matters this print: the blockade targets IRAN'S EXPORT OUTLET (Bandar Abbas, Abadan, Mahshahr), not the through-corridor. The GCC crude that is the bulk of Hormuz volume (Saudi, UAE, Kuwait, Qatar) keeps moving — CENTCOM says the Strait remains open to lawful transit — while Iran's own barrels are throttled. ~7.0 mb/d still transits: reduced, contested, a live blockade on one flag's exports — not a shut Strait.
• TRANSITS + THROUGHPUT — the flow is the feedback: throughput has DIPPED further to ~7.0 mb/d (8.0 on 15 Jul) — The siege is measurably biting: throughput fell from ~8.0 (15 Jul) to ~7.0 mb/d as Iran's dark export trickle is cut, and dark share fell 55 -> 50; observable transits collapsed to ~7/day (≈5% of the ~138/day baseline) as ships run dark. That is the actual-flow signal the monitor exists to catch — a real, quantified dent in Iranian exports, NOT a corridor closure. ~7.0 mb/d = ~35% of the ~20 mb/d all-liquids norm.
• HOW OPEN — implied ~49% SPOT / ~91% FORWARD, physical ~35% — an ACUTE but TEMPORARY disruption — IMPLIED openness (pricing) sits ~49% on the SPOT (the oil-decomposition model: Brent $84.5, a ~$17.5/bbl residual Hormuz premium net of SPR/OPEC+/demand) — but the 12m FORWARD (CO12 $77.03) implies ~91% open: the STEEP backwardation (CO1-CO12 +$7.5, ~8.8% front/12m) prices an ACUTE near-term scarcity that normalizes forward. OBSERVABLE throughput ~7.0 mb/d = ~35% of the ~20 mb/d norm — price (spot ~49%) and flow (~35%) both say REDUCED, still above the ~20% a genuine closure implies. Intense but TEMPORARY — not shut.
• PHASE — HOLD — Phase 2 (Fragile ceasefire, ESCALATING). The durability composite sits below the -0.5 line, so the mechanical rule would TIP to Phase 1 — the DOWNGRADE-RISK trigger fires. We OVERRIDE and HOLD Phase 2: the blockade targets Iran's export OUTLET, not the shared corridor, which still moves ~7.0 mb/d; Kharg is spared, mining is armed-not-fired, and the market is not pricing closure. This is the pricing-vs-physical divergence the monitor exists to surface. Phase-1-proper triggers (a Kharg strike, a mine detonation, Brent through ~$95) ARMING, unfired.
• VELOCITY — the read shifts from escalate-vs-de-escalate to WHOSE CLOCK RUNS OUT FIRST — The siege intensified (US strikes a 3rd day, 2 supertankers hit, Kuwait+Bahrain struck) but Trump ABANDONED the 20% toll and Kharg was spared (the metering is the signal). The Two-Clock frame: the blockade drains Iran's finite export leverage (arsenal spend-down + the bypass build-out) — its clock runs down. The swing (24-72h): a Kharg/terminal strike or a mine detonation (tip to Phase 1) vs a visible settlement-from-weakness signal (a strike pause, a fees-regime understanding) that starts the path back to Phase 3.

OFFICIAL RECORD * SoH — Statements * decisions - as regards the Strait

• SIEGE INTENSIFIES — US strikes a THIRD day; blockade reinstated (17 Jul) — The kinetic track stepped up: US strikes ran a THIRD day, the naval blockade is reinstated, and Iran hit TWO supertankers + struck US assets in Kuwait AND Bahrain. visible AIS-on transits fell to ~7/day as ships run dark. Yet it stays aimed at Iran's EXPORT OUTLET, not the shared corridor — throughput dips further (8.0 15 Jul -> 7.0), cutting Iranian barrels specifically, not shutting the Strait.
• KHARG SPARED — the one clean closure trigger, deliberately UNFIRED — The US strikes (a third day) have pointedly SPARED Kharg — Iran's single export terminal (~90-96% of crude through one node). You do not spare the one asset whose loss would actually shut the corridor if your aim is to shut it. A confirmed strike on Kharg, a mine detonation, or the blockade cutting the through-corridor to near-zero are the lines that convert this into a genuine supply loss. None is fired.
• TRUMP ABANDONED THE 20% TOLL — the midterm clock spoke — The 20% 'Guardian of the Strait' toll floated 13 Jul is ABANDONED: the shipping industry largely opposed it, and Trump says the Gulf states will invest in the US as repayment instead. The asymmetry is the tell — he can wield a blockade (which bleeds Iran) but not a toll (which bleeds his own voter). The IMO had in any case said there was 'no legal basis' for tolling an international strait.
• IRAN HITS TWO SUPERTANKERS + STRIKES KUWAIT AND BAHRAIN — a bigger salvo — Iran's reply stepped up: the IRGC hit TWO oil supertankers in the Strait and launched missile + drone strikes on US assets in Kuwait AND Bahrain. A genuine escalation of the salvo lane — but still SHORT of the closure triggers (no Kharg strike, no mine detonation), and, on a finite non-replenishable arsenal, every salvo is a spend-down that drains Iran's clock even as it hardens the siege.
• FLOW — throughput has DIPPED further to ~7.0 mb/d (8.0 on 15 Jul); the blockade is working on Iran's exports — The GCC through-corridor (Saudi/UAE/Kuwait/Qatar) holds — but Iran's own dark export trickle is being cut, taking total throughput from ~8.0 to ~7.0 mb/d (~35% of the ~20 mb/d norm) and dark share 55 -> 50; visible AIS-on transits ~7/day (≈5% of the ~138/day baseline) as ships run dark. Reroute cushions (Saudi East-West ~5 mb/d spare, UAE Fujairah ~1.5 mb/d, expanding) sit BEHIND Hormuz and are the structural cap on Iran's leverage — the bypass build-out that makes the Strait matter less to everyone but Iran.
• PRICE — Brent $84.5, STEEP backwardation — not pricing closure — Brent $84.5 (CO1) — up on the intensifying siege but FAR below the $100-130 a genuine closure implies, and capped by the abandoned toll, the spared Kharg, OPEC+'s fifth hike and a soft-demand glut (Goldman: >$100 only if closure persists a month). The curve is in STEEP backwardation (CO1 $84.5 vs CO12 $77.03 = +$7.5, 8.8% front/12m) — acute near-term scarcity, but the 12m forward ($77) prices normalization, not a durable shut-in. War-risk hull cover firming.
• DIPLOMACY — the channel persists; GL X survives — Araghchi's Muscat channel with Oman's al-Busaidi survived the escalation (Qatar mediating), and OFAC's GL X oil-waiver (to Aug 21) is intact — both left standing amid the blockade, which is itself part of the metered-coercion read. The end-game the channel points to is a managed-corridor / fees regime reached from Iranian weakness as the siege drains Tehran's leverage — a 6-18 month horizon, not this week.

WHERE WE'VE COME FROM — Trajectory

• 2026-07-07/11 — IRGC tanker strikes (7 Jul) and a two-way exchange (8 Jul) end the ceasefire era; a contained mourning-week cycle, oil to ~$76; a brief 10-11 Jul pause (Araghchi to Oman). Phase 4 -> Phase 3.
• 2026-07-13 — The policy track escalates: Trump floats a 20% Hormuz toll + a resumed blockade of Iranian ports; two UAE tankers struck (first fatality); Brent gaps ~+4% to ~$79. Phase 2 held — the vector turns sharply negative.
• 2026-07-14 — HOLD Phase 2 (escalating). Throughput corrected 4.5 -> ~8.0 mb/d (the 4.5 was a stale Q1 average); corridor open, no terminal struck, mining armed-not-fired, market not pricing closure. Brent ~$85. Phase-1 triggers arming, unfired.
• 2026-07-15 — The blockade FIRES — in force and biting (a vessel disabled off Bandar Abbas; Abadan/Mahshahr struck). But a MANAGED siege: Trump ABANDONED the 20% toll (Gulf states to invest in the US instead), Iran's Kuwait reply intercepted, Kharg SPARED, GL X intact. Flow is the feedback: throughput dipped 8.0 -> 7.0 mb/d (dark 55 -> 50) as the siege cuts Iran's exports. HOLD Phase 2. Brent ~$85. The read shifts to the Two-Clock frame — whose leverage runs out first.
• 2026-07-16 — Blockade in force, DAY 2 — the state holds: throughput ~7.0 mb/d (unchanged; the siege bites Iran's exports at the same rate), Kharg still spared, the through-corridor open, Brent ~$85. HOLD Phase 2. No new Phase-1 trigger fired; the Two-Clock grind continues — Iran's leverage drains as its arsenal spends down and the bypass build-out advances.
• 2026-07-17 — The siege INTENSIFIES: US strikes a THIRD day, the blockade reinstated, Iran hit TWO supertankers and struck US assets in Kuwait AND Bahrain; Hormuz transits collapsed to ~7/day as ships run dark. Throughput dips further to ~7.0 mb/d. But STILL Phase 2, not a closure: Brent $84.5, steep backwardation (a supply premium, not the $100-130 a shut Strait implies), Kharg spared, and Trump ABANDONED the 20% toll. A more kinetic, more-throttled siege on the same Two-Clock trajectory — Iran's leverage draining.

WHERE IT'S HEADED — Direction * accelerants * reversers

• DIRECTION — a clock, not a ladder — The blockade is now biting Iran's exports (throughput 8.0 -> 7.0) while the shared corridor holds. The frame is no longer escalate-vs-de-escalate but WHOSE CLOCK RUNS OUT FIRST: Iran's finite arsenal + the bypass build-out (Fujairah, East-West) drain its leverage; Trump's midterm pump is his constraint (why he abandoned the toll). The siege LOWERS near-term stability but RAISES the end-game odds over 6-18 months.
• TIP TO PHASE 1 (active closure) — A confirmed strike on an oil-export TERMINAL (Kharg), OR a MINE DETONATION on a hull, OR the blockade widening from Iran's ports to the through-corridor, OR a Brent break decisively through ~$95. Any turns a throttled Iranian-export siege into a corridor supply-loss shock. Per the shifting-power tail, a DECLINING Iran is the one most tempted to a use-it-or-lose-it slip — the tail is highest where it looks managed.
• PATH BACK TO PHASE 3 — A visible settlement-from-weakness signal: a strike pause, Tehran softening its posture, or a fees-regime understanding via the (still-live) Muscat channel, with the blockade eased. This is the medium-term base case — but on a 6-18 month horizon as the leverage transfer completes, not a this-week off-ramp.

SCENARIOS — Base * Bear * Bull

• BASE — Phase 2, escalating, holds: the blockade grinds Iran's export trickle (throughput ~7.0-7.5, dark falling) while the GCC corridor keeps flowing, Kharg is untouched, salvos are intercepted, and no counterparty can yet sign; Brent low-to-mid $80s. A modern tanker-war of attrition metered by the two clocks.
• BEAR — Phase 1: a Kharg/terminal strike, a mine detonation, or the blockade widening to the through-corridor halts flow; Brent +$10-25 to $95-110, a genuine supply shock. The shifting-power tail — a declining Iran's use-it-or-lose-it slip — makes this live, but it is NOT the base.
• BULL — A visible settlement-from-weakness turn: a strike pause, a fees-regime understanding via Muscat, the blockade eased — re-establishing a fragile Phase 3 and bleeding the premium. The channel is alive and Iran's >60% inflation argues it wants the off-ramp; but this is the 6-18 month destination, not the near-term modal path.

Bottom line. HOLD — Phase 2 (Fragile ceasefire, ESCALATING). The siege INTENSIFIES — US strikes a THIRD day, the blockade reinstated, Iran hit TWO supertankers + struck Kuwait AND Bahrain, transits down to ~7/day as ships run dark — but it is still a MANAGED siege, not a closure. Read the whole target set: Trump ABANDONED the 20% toll, the US SPARED Kharg, GL X survives, and Brent $84.5. The flow is the feedback: throughput has DIPPED further to ~7.0 mb/d (8.0 on 15 Jul; dark 55 -> 50) as the siege cuts Iran's dark export trickle — ~35% of the ~20 mb/d norm, degraded not shut, with the GCC through-corridor holding. This is a more kinetic siege measurably draining Iran's EXPORT leverage, NOT a corridor closure. The durability vector would mechanically tip to Phase 1 — we OVERRIDE and hold Phase 2, because the siege targets Iran's export outlet, Kharg is spared, and price does not confirm closure (Brent $84.5 vs $100-130). The frame is now the Two-Clock: whose leverage runs out first — the siege LOWERS near-term resolution (the 90-day prob sits at a cycle low) while RAISING the end-game odds (settlement-from-weakness, 6-18 months out). Phase-1-proper triggers (a Kharg strike, a mine detonation, Brent through ~$95) ARMING, not fired.