Strait of Hormuz: Which countries’s ships has Iran allowed safe passage to?

One-fifth of global oil transits the Strait of Hormuz; Brent crude jumped to $105.70 (up 2.5% on the day) — more than 40% above the pre-war ~$65 level — after Iran declared the strait closed to the US and its allies. Tehran has granted limited safe passage to vessels from Pakistan, India and Turkey and is reportedly in talks with China, France and Italy, while the US has urged a multinational naval coalition that key partners have declined to join. This significantly raises supply-disruption risk, drives near-term oil-price volatility and could increase shipping insurance and regional naval exposure, suggesting a defensive/hedged posture for energy-exposed portfolios.

Analysis

A partial, politically-driven interruption of a chokepoint produces concentrated winners: owners of tonnage and owners of prompt charter exposure capture outsized margin upside because freight is a convex payoff — a short-duration increase in voyage times or strike insurance premiums can triple dayrates for certain vessel classes. The immediate amplification mechanism is twofold: (1) rerouting and wait times create lost voyages (fewer sailings per ship per quarter), and (2) war-risk and P&I premiums rise non-linearly, which flows straight to cash generation for spot-exposed owners while compressing the economics of refiners and commodity logistics users.

Key risk paths are fast and binary. A diplomatic corridor or a credible multinational naval protection mission materially compresses both premiums and time-charter spreads within weeks; conversely, escalation into broader strikes or mine warfare embeds disruption for months and forces structural re-routing that benefits owners of extra-regulation-compliant, long-haul VLCCs and LNG carriers. Watch two near-term market indicators as catalysts: freight-forwarding indices (Baltic/Clarkson spot curves) and short-dated war-risk insurance quotes — they lead price moves in equities by 1–3 trading days.

The consensus trade — owning energy producers to hedge higher oil — is obvious and priced in; the asymmetric alpha is in transport and service providers that reprice fast and have limited capital intensity to add capacity short-term. A pragmatic portfolio should express the disruption via concentrated, time-boxed exposures to shipping and insurance repricing, combined with a dynamic hedge (short refiners or buy put protection) sized to catalytic scenarios and capped by pre-defined stop-losses tied to normalization signals.

Key Decisions for Investors

• Tanker spot play (short-duration, high convexity): Buy an equal-weighted basket of liquid tanker names (EURN, FRO, STNG) with a 1–3 month horizon. Position size: 2–4% of portfolio. Target: +40–80% total return if spot rates spike; Stop-loss: 20% from entry or roll to calls (buy 3-month ATM calls on STNG to cap downside). Rationale: immediate cash-flow uplift from higher voyage rates and rising TC/spot exposure.
• LNG shipping optionality: Buy 3–6 month call spreads on GLNG or GLOG (long 6–9 month OTM call, sell farther OTM to fund). Position size: 1–2% notional. Target payoff: asymmetric 3:1 upside if LNG rerouting increases charter demand; risk limited to premium paid. Mechanism: tight near‑term fleet elasticity and high per-voyage margin.
• Energy pair (defensive): Long XOM + CVX vs short VLO + PSX, 3-month horizon, 1:1 dollar exposure. Position size: net market neutral, 2–3% gross each side. Target relative outperformance 6–12% if crude remains supported while refinery margins compress; risk: rapid diplomatic de-escalation collapsing the spread.
• Insurance/Services convexity play: Buy 6-month calls on AON or MMC (or buy call spreads to limit premium) sized 1% portfolio. Target: 25–40% upside if war-risk/P&I broking fees surge; risk: slow reaction in equities if premium increases are incremental rather than headline-driven.
• Defined crude exposure with capped cost: Buy a 1–2 month Brent call spread (buy near-OTM, sell further OTM) to capture short-term price spikes while limiting premium. Position size: 1–2% portfolio. Reward: captures headline-driven squeezes; hedge by exiting if freight and insurance indices revert toward pre-event levels.