Strait of Hormuz Monitor — 21 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. ~6.8 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 HOLDS at ~6.8 mb/d (8.0 on 15 Jul), day 7 — The siege is measurably biting and now HOLDING: throughput ~6.8 mb/d (down from ~8.0 on 15 Jul) as Iran's dark export trickle stays cut, dark share ~50, observable transits ~6/day (≈4% of the ~138/day baseline) as ships run dark — unchanged from Monday. A real, quantified dent in Iranian exports that is STICKING, NOT a corridor closure. ~6.8 mb/d = ~34% of the ~20 mb/d all-liquids norm.
• HOW OPEN — implied ~37% SPOT / ~92% FORWARD, physical ~34% — an ACUTE but TEMPORARY disruption, HELD — IMPLIED openness (pricing) HOLDS at ~37% on the SPOT (the oil-decomposition model: Brent $88.53, a ~$21.5/bbl residual Hormuz premium net of SPR/OPEC+/demand) — the premium sitting near the widest of the siege but NOT extending — while the 12m FORWARD (CO12 $76.62) implies ~92% open: the STEEP backwardation (CO1-CO12 +$11.91, ~15% front/12m) prices an ACUTE near-term scarcity that FULLY normalizes within a year. OBSERVABLE throughput ~6.8 mb/d = ~34% of the ~20 mb/d norm — price (37%) and flow (34%) AGREE on ~a third open, an acute disruption, still above the ~20% a genuine closure implies. The market's verdict, now STICKING: intense but TEMPORARY — the Two-Clock priced in oil.
• 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 ~6.8 mb/d; Kharg is spared, mining is armed-not-fired, and the forward curve prices normalization (12m 92% open), not closure. The oil re-bid to $88 is the loudest escalation tell yet — the closest to the ~$95 Phase-1 line — but STILL below it. 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 has ground into a SEVENTH day and the OIL is now HOLDING its bid (Brent $88.5, steep backwardation held) — the market SUSTAINING its acute near-term scarcity price even as Kharg stays spared and the toll abandoned (the metering holds). The Two-Clock frame: the blockade drains Iran's finite export leverage — its clock runs down; the forward curve (12m $77, ~92% open) already prices the normalization. The swing (24-72h): Brent breaking ~$95, 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 GRINDS ON — US strikes a SEVENTH day; the OIL holds its gap (21 Jul) — The siege ground into a SEVENTH day (blockade fired 15 Jul): US strikes continue, the naval blockade holds, and the signal is now that the OIL is HOLDING — Brent CONSOLIDATED at $88.53 (from Mon's $88.10 (20 Jul), +$0.4) in steep backwardation, the weekend gap sticking rather than fading. visible AIS-on transits ~6/day as ships run dark. It stays aimed at Iran's EXPORT OUTLET, not the shared corridor — throughput holds ~6.8 mb/d (8.0 15 Jul -> 6.8), cutting Iranian barrels specifically, not shutting the Strait.
• KHARG SPARED — the one clean closure trigger, deliberately UNFIRED — The US strikes (a seventh 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 HOLDS at ~6.8 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 stays cut, holding total throughput at ~6.8 mb/d (down from ~8.0, ~34% of the ~20 mb/d norm) and dark share ~50; visible AIS-on transits ~6/day (≈4% 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 HOLDS ~$88.5, STEEP backwardation — sustained acute near-term scarcity, still not closure — Brent CONSOLIDATED at $88.53 (CO1) — +$0.4 from Mon's $88.10 (20 Jul), the +$3.6 weekend gap now STICKING rather than fading as the siege ground into a seventh day — the oil holding its bid is the escalation tell that MATTERS: the market is not fading the premium. The curve is in STEEP backwardation (CO1 $88.53 vs CO12 $76.62 = +$11.91, ~15% front/12m) — acute NEAR-TERM scarcity, prompt barrels bid up. But two caps hold: (i) $88.5 is still FAR below the $100-130 a genuine closure implies and below the ~$95 Phase-1 line; (ii) the 12m FORWARD at ~$77 prices FULL normalization — the market reads the disruption as intense but TEMPORARY, not a durable shut-in. Kharg spared, toll abandoned, OPEC+ spare behind Hormuz. A break decisively through ~$95 is the closure tell.
• 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 ~$85 (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.
• 2026-07-18/19 — Weekend, blockade DAY 4-5 — the siege holds through the weekend: US strikes continue, the blockade in force, Kharg spared, throughput ~6.8-7.0 mb/d, transits low (~6/day, ships dark). Oil firms into Monday. HOLD Phase 2; no new Phase-1 trigger fired.
• 2026-07-20 — The OIL RE-BIDS — Brent GAPS to $88.10 (CO1, from Fri's $84.5 (17 Jul)) in STEEP backwardation (CO1-CO12 +$11.4, ~13% front/12m). The siege's SIXTH day; the oil market now prices an ACUTE near-term scarcity (spot implied ~38% open) that normalizes forward (12m 92%). Throughput ~6.8 mb/d, Kharg spared. STILL Phase 2, not a closure: $88 < the ~$95 trigger. The escalation tell is now the OIL — the closest to the trigger yet.

WHERE IT'S HEADED — Direction * accelerants * reversers

• DIRECTION — a clock, not a ladder — The blockade is now biting Iran's exports (throughput 8.0 -> 6.8, held) while the shared corridor holds, and the OIL is holding its bid (Brent $88.5, steep backwardation sustained) — acute near-term pressure that is not fading. 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; the forward curve (12m $77, ~92% open) already prices the normalization. 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 6.8-7.0) while the GCC corridor keeps flowing, Kharg is untouched, no counterparty can yet sign; Brent high-$80s spot in steep backwardation, the 12m forward pricing normalization ($77). A modern tanker-war of attrition metered by the two clocks — acute now, temporary.
• 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; the 12m forward ($77, ~92% open) already prices this normalization — but it is the 6-18 month destination, not the near-term modal path.

Bottom line. HOLD — Phase 2 (Fragile ceasefire, ESCALATING). The siege grinds into a SEVENTH day and the OIL HOLDS its gap: Brent CONSOLIDATED at $88.53 (CO1, from Mon's $88.10 (20 Jul), +$0.4 — the weekend gap sticking) in STEEP backwardation (CO1-CO12 +$11.91, ~15% front/12m) — the market SUSTAINING an ACUTE near-term scarcity, NOT fading it. But it is still a MANAGED siege, not a closure. The oil-decomposition model reads implied openness ~37% (SPOT) yet ~92% at the 12m FORWARD (CO12 $76.62): an INTENSE-but-TEMPORARY disruption — the market's own Two-Clock (leverage real now, draining to normalization within a year). The flow agrees: throughput HELD at ~6.8 mb/d (~34% of the ~20 mb/d norm) — price (37%) and flow (34%) agree on ~a third open, degraded not shut, the GCC through-corridor holding. Kharg is spared, the toll abandoned, and Brent ($88.5) is still below the ~$95 Phase-1 line and the $100-130 a shut Strait implies. The durability vector would mechanically tip to Phase 1 — we OVERRIDE and hold Phase 2: the siege targets Iran's export outlet, Kharg is intact, and the forward curve prices normalization, not closure. But the oil re-bidding to $88 is the closest to the ~$95 trigger yet — the escalation tell to watch. Phase-1-proper triggers (a Kharg strike, a mine detonation, Brent through ~$95) ARMING, not fired.