Maritime trade risk intelligence.
Chokepoint exposure quantified by corridor, commodity, and vessel class. Available before the disruption.
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Every product in The Narrows is built on the Chokepoint Dependency Model. Bilateral trade data at commodity level, supplemented and validated with vessel, port, and market sources. The CDM is available directly to institutional and analytical clients.
Risk intelligence products.
The Narrows products are connected and built on a common data foundation. Different clients will need some, all, or none of them.
3,778 ports scored across four risk dimensions: accessibility, reliability, trade concentration, and political stability. The entry point to The Narrows data layer.
Open the Port Risk IndexCorridor and scenario analysis demonstrating the method against live events. Published outputs proving the model and quantifying disruption.
Read the analysisBilateral trade dependency at commodity level across the world's principal maritime corridors. The data foundation. Available to institutional and analytical clients.
EnquireThe CDM applied to a specific cargo portfolio. Locked positions, divertible positions, and rerouting cost by vessel class. A demonstration version is available.
View demonstration Full version runs against a live portfolio.Decision-support for live events. Committed fleet positions, decision windows, diversion cost and timeline by vessel. Built for the desk managing a closure in real time.
View demonstrationThe Narrows methodology applied to a specific event, portfolio, or research question. Commissioned scenario and corridor analysis delivered as a report.
Enquire3,778 ports scored.
Across four dimensions of risk.
The Narrows Port Risk Index applies an INFORM-style composite methodology to every major port in the World Port Index. Physical accessibility, operational reliability, trade concentration, and political stability: each scored, each decomposable, one composite number per port.
| Rank | Port | Country | PRI | D1 | D2 | D3 | D4 |
|---|---|---|---|---|---|---|---|
| 3,778 | Aden | Yemen | 3.64 | 1.5 | 6.7 | 2.6 | 6.6 |
| 3,803 | Nueva Gerona | Cuba | 3.12 | 5.9 | 5.9 | 1.5 | 1.8 |
| 2,515 | Durban | South Africa | 1.29 | 0.5 | 4.3 | 3.4 | 0.4 |
| 1 | Jurong Island | Singapore | 0.71 |
The method, demonstrated.
Published analysis applying The Narrows model to live events and corridors. Free to read.
The Chokepoint Dependency Model was built on 2022 data and locked before the Houthi Red Sea campaign and Panama Canal drought. Here is what it got right.
ReadIndonesia floated transit fees on the Strait of Malacca. The question did not go away. Bilateral trade dependency data quantifies who pays and by how much.
ReadThe most modelled chokepoint in the world is also the most misunderstood. What the bilateral dependency data reveals about captivity, substitution, and who actually pays.
ReadRequest a briefing.
The Narrows runs scenarios in front of the client, with the client's assumptions, on the corridor of interest. A person will respond.