Weekly International Affairs & Strategic Risk Update #18
Global Risk & Crisis Brief is a weekly strategic publication by The Mentors, providing concise analysis of geopolitical, security, economic and regulatory developments shaping today’s international risk environment.
Each edition examines emerging trends, policy shifts and evolving crisis dynamics that may influence governments, businesses and organisations operating across complex global markets.
Designed for executives, legal advisers and decision-makers, the briefing supports strategic awareness, informed judgement and proactive crisis management through clear, practical and forward-looking insights.
The Strait of Hormuz: When a Regional War Becomes a Global Economic Risk
The strategic question: What happens when a regional conflict turns a critical maritime chokepoint into an instrument of economic coercion?
The latest US-Iran escalation has brought the Strait of Hormuz back to the centre of global risk calculations. On 30 August, US forces struck Iranian rocket launchers on Larak Island after Washington said Iran was preparing to deploy sea mines in the Strait. Iran retaliated with missile attacks against US forces in Jordan, while the UAE reported intercepting an Iranian drone over its territorial waters.
The immediate military significance is serious. The broader strategic significance is greater.
Hormuz is one of the world’s most important energy chokepoints. Around 20% of global seaborne oil normally passes through the Strait. Even without a formal closure, a sustained deterioration in the security of the waterway can raise freight rates, war-risk insurance, transit times and energy prices. Recent insurance premiums for vessels operating in the Persian Gulf have reportedly risen to levels far above normal peacetime costs.
The real risk is not necessarily closure
A conventional analysis tends to ask whether Iran will “close” the Strait of Hormuz.
That may be the wrong question.
The more consequential scenario may be a functionally impaired Strait: technically open, but sufficiently dangerous or expensive that commercial operators reduce or suspend traffic.
This distinction matters. A state does not need to physically block a maritime chokepoint to disrupt it. The combination of mines, missile threats, attacks on shipping, uncertainty over navigation rules and prohibitive insurance costs can produce much the same economic effect.
Current developments already point in this direction. Reuters reported on 31 August that oil shipments through the Strait had partially recovered to around 15–16 million barrels per day, but remained below pre-war levels, while Brent crude moved above $90 following the latest escalation.
Risk 1: Energy shock
The first transmission channel is obvious: oil.
Brent crude rose above $90 following the latest exchange of fire, with markets immediately repricing the risk of further disruption.
The danger is not simply a temporary price spike. A prolonged period of elevated energy prices could feed into transport, manufacturing, food prices and household costs, complicating monetary policy at precisely the moment when central banks are trying to manage inflation and growth.
The result could be a familiar geopolitical pattern: a security crisis becomes a monetary-policy problem.
Risk 2: Maritime insurance and commercial behaviour
The second channel is less visible but potentially just as important.
Shipping decisions are based not only on whether a route is physically open, but whether it is commercially insurable.
War-risk premiums for vessels operating in the Persian Gulf have reportedly reached 3–6% of vessel value, compared with around 0.25% in peacetime.
At that point, the economics of transit begin to change.
Even if naval forces can keep a shipping lane nominally open, commercial operators may decide that the risk-adjusted cost of using it is unacceptable.
This is where military deterrence and commercial confidence diverge.
Risk 3: Escalation beyond Iran
The geographical risk is also widening.
The latest Iranian retaliation reached US military facilities in Jordan, while the UAE reported intercepting an Iranian drone.
This creates a growing risk of regionalisation: Gulf states, US forces, shipping interests and energy infrastructure becoming progressively more involved in a conflict that began as a confrontation centred on Iran.
For governments in the Gulf, the strategic dilemma is particularly difficult. They have an interest in maintaining freedom of navigation and energy exports, but also an interest in avoiding becoming direct participants in the conflict.
Risk 4: The limits of military control
The US can strike missile launchers, clear mines and escort shipping.
But military control of a maritime chokepoint does not automatically restore normal commercial activity.
The key question is whether shipping companies, insurers, energy traders and port operators believe that the risk has genuinely fallen.
That creates a strategic paradox:
The Strait can be militarily secured without becoming economically normal.
This is why the next phase of the crisis may be determined as much by commercial behaviour as by military operations.
Risk 5: A wider global economic transmission
Hormuz should therefore be viewed as part of a broader system of maritime vulnerability.
The Red Sea, Black Sea and Strait of Hormuz have all demonstrated how geopolitical conflict can disrupt routes that global trade has come to treat as infrastructure rather than strategic assets. The Council on Foreign Relations has similarly highlighted how conflict-driven disruption of maritime chokepoints can transmit geopolitical shocks into wider economic systems.
For companies, the lesson is straightforward: critical supply routes are strategic dependencies.
Energy-intensive industries, shipping, logistics, aviation, manufacturing and financial markets can all be affected without a single attack taking place on their own assets.
What to watch next
The most important indicators over the coming weeks will be:
- Actual shipping volumes through Hormuz, rather than official claims about whether the Strait is “open”;
- War-risk insurance premiums and tanker freight rates;
- Brent crude and the forward oil curve, particularly whether the market begins pricing prolonged disruption;
- Any further mining or attacks on commercial vessels;
- US naval escort operations and their sustainability;
- Iranian attempts to impose or enforce its own navigation conditions;
- Gulf-state involvement, particularly by Saudi Arabia, the UAE, Oman and Qatar;
- Diplomatic efforts aimed at restoring predictable commercial passage.
Strategic Risk Outlook
Risk level: HIGH
The immediate probability of a complete and prolonged closure of the Strait remains difficult to assess. But that is not the only relevant risk.
The more credible near-term scenario is persistent disruption without formal closure, producing a sustained risk premium across oil, shipping and insurance.
That scenario is strategically important because it does not require a decisive military victory by either side. It only requires enough uncertainty to change commercial behaviour.
Strategic Takeaway
The Strait of Hormuz illustrates a broader transformation in geopolitical risk.
Modern economic coercion does not always require shutting a chokepoint. Making it too risky, too expensive or too uncertain to use can be enough.
For governments and businesses, the strategic question is therefore no longer simply whether Hormuz remains open.
It is whether global commerce can continue to treat it as reliably open.
And that distinction may determine whether today’s regional conflict remains a contained security crisis, or becomes a much broader global economic shock.
The Mentors | Strategic Advisory
