Markets

Shipping cycles

Published 28 August 2026 · updated 22 September 2026

Freight rates do not drift the way most prices do. They sit near the cost of running a ship for years, then multiply several times over in a few months, then fall back through the floor. That shape is not sentiment and it is not speculation. It is the arithmetic of an industry where demand can change this quarter and supply cannot.

Why the shape is inevitable

On any given day the world fleet is fixed. Every ship that will carry cargo next month is already floating, and nothing an owner decides today changes that. Demand, meanwhile, moves with harvests, steel production, refinery runs, weather, sanctions and war. When cargo appears and there is no spare tonnage, freight does not rise politely by a few per cent: it rises until enough charterers decide not to ship, which can be a very long way up. When cargo disappears, the ships do not disappear with it, and the rate falls until owners start refusing to trade at a loss.

The correcting mechanism is a shipyard, and a shipyard takes years. An owner who orders at the peak takes delivery into a market that has already turned, because every other owner ordered at the same time for the same reason. That lag between the decision and the steel is the engine of the cycle, and it is why the industry's own optimism is what ends each boom.

The four stages

Martin Stopford's description in Maritime Economics is the one the trade uses, and it is worth knowing because it gives each phase a test rather than a feeling.

The stages are reliable in order and unreliable in length. A trough can last years and a peak can last weeks. Anyone who tells you a cycle has a period is selling something: the pattern is regular in mechanism and irregular in time.

Three cycles running at once

The number on the screen is the sum of at least three different things, and separating them is most of the skill in reading a market.

• Seasonal. Grain harvests, the ice season, the monsoon, the northern winter's coal draw, the fortnight around Chinese New Year. These repeat, they are known in advance, and a desk that does not allow for them will read an entirely ordinary January as a collapse.
• Short cycle. The four stages above, driven by the orderbook and by demand growth. This is the cycle that decides whether an owner makes money over a few years.
• Long structural shifts. A trade route opening or closing, a fuel transition, a country industrialising. These reshape which ships are wanted rather than how much they earn, and they run over decades.

Supply is less fixed than it looks

The fleet is fixed in hulls but not in capacity, and three valves change effective supply without a single ship being built or broken.

Speed. The whole fleet slowing down absorbs tonnage; the whole fleet speeding up releases it. When rates are high the fuel cost of going faster is worth paying, so effective supply rises exactly when the market least wants it to. This is the fastest-acting valve in shipping and it is invisible in a fleet count.

Distance. Cargo is measured in tonnes and shipping is consumed in tonne-miles. A rerouting that sends ships the long way round removes supply without a single extra tonne moving. Two markets can be identical in cargo volume and completely different in the tonnage they need.

Idle time. Congestion, waiting for berth, quarantine, repair queues. Ships stuck at anchor are supply that has left the market, and the effect is the same as scrapping them for as long as it lasts. This is the reason port waiting shows up in a voyage estimate and in the freight market at the same time.

Where the money is actually made

A fixture earns a margin. The cycle earns the fortune, and it does so through the asset price rather than the freight rate. A ship bought at the trough and sold at the peak can return more than she ever earned carrying cargo, and a ship bought at the peak can lose more than her freight will ever recover. The freight market, the second-hand market and the demolition market are one system: rates set what a ship is worth, the value sets what she can borrow against, and the scrap price sets the floor under both. Sale and purchase and ship recycling and demolition are the other two halves of the same subject.

This is also why the cycle self-corrects rather than running away. At the trough, an owner facing a special survey compares the yard bill against what a demolition buyer will pay, and the marginal ship goes. Supply falls precisely when earnings are worst, which is the beginning of the recovery nobody can see yet.

What a broking desk should take from this

Not a forecast. Nobody calls the turn, and the confident people who do are only remembered when they happen to be right. What the cycle is good for is calibration:

• Know which stage the conversation assumes. An owner holding out for last quarter's number in a collapsing market and a charterer expecting trough rates in a recovery are making the same mistake in opposite directions.
• Watch the orderbook, not the sentiment. Tonnage on order is the only forward-looking supply figure that exists, it is public, and it is the thing that ends booms.
• Keep your own record. The most useful market history a desk can have is what it actually fixed, at what rate, on what route, with dates attached. Memory smooths the peaks and forgets the troughs; a fixture book does not.
• Do not confuse a season with a turn. The single most common misreading of a market is treating a predictable annual pattern as a change in direction.

The unglamorous conclusion is that timing is a discipline rather than a talent. Owners who survive several cycles are not the ones who guessed best; they are the ones who did not commit at the peak and still had cash at the trough.

References

• Martin Stopford, Maritime Economics, 3rd edition, 2009. Routledge
• UNCTAD, Review of Maritime Transport 2025. PDF
• ECLAC, The shipping cycle in the international container market, 2017. PDF
• Baltic Exchange, Indices. balticexchange.com

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