War risk insurance and the price of moving goods

A shipowner will not sail an uninsured vessel and a bank will not finance an uninsured cargo. Insurance is therefore not an accessory to trade; it is a precondition, and its absence stops trade as effectively as a blockade.

What had to be rebuilt

Hull cover, protecting the vessel. Protection and indemnity cover, for liability. And cargo cover, protecting the goods.

Each is written by different parties, and all three are needed for a voyage to happen.

Why premiums were the binding constraint

War risk premium is quoted as a percentage of insured value per voyage. At a high enough percentage, the premium exceeds the margin on a cargo of grain, and the voyage does not happen regardless of whether cover is technically available.

The problem was therefore not availability but price, and price is set by underwriters from observed frequency of loss.

What brought the price down

Uneventful transits, accumulating. Every voyage completed without incident is a data point that lowers the next quotation, which is why the first vessels mattered far beyond their cargo.

State-backed facilities, in which a government or an international institution takes the first tranche of risk, allowing commercial underwriters to write the rest at a rate that works.

And better information: verified routing, inspection arrangements and transparent transit data, all of which reduce the uncertainty an underwriter prices.

The general lesson

Trade routes are opened by insurers as much as by anyone else, and a government that wants a corridor should work on the risk transfer as seriously as on the diplomacy.

No cargo moves until the premium falls — I watched that day by day in my own shipments. What convinced the insurers was not a political assurance but a run of voyages that passed without incident; as the risk became calculable the price came down. The general lesson is that a corridor is opened by a track record rather than by an agreement.