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Shipping cycles
Freight rates do not move slowly like most prices. For years they stay close to the cost of running a ship, then rise to several times that level in a few months, then fall back below that cost again. This pattern does not come from mood or speculation but from simple arithmetic: in shipping, demand can change this quarter, but 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 afloat, and nothing an owner decides today changes that. Demand, on the other hand, moves with harvests, steel production, refinery output, weather, sanctions and war. When cargo appears and there are no spare ships, freight does not rise gently by a few per cent. It rises until enough charterers decide not to ship, and that point can be very high. When cargo disappears, the ships do not disappear with it. The rate falls until owners start refusing to trade at a loss.
The only way to end a shortage is to build more ships, and a shipyard takes years to build them. An owner who orders a ship at the peak receives it when the market has already turned. This happens because every other owner ordered at the same time, for the same reason. That delay between the order and the finished ship drives the cycle. It is why each boom is ended by the owners’ own optimism.
The four stages
The trade uses Martin Stopford's description in Maritime Economics. It is worth knowing because it gives each stage a clear sign that you can check, not just a feeling.
| Stage | What rates do | What owners do |
|---|---|---|
| Trough | Fall towards the running cost of the least efficient ships | Lay ships up (take them out of service), sail slower, sell for recycling |
| Recovery | Rise as demand catches up with a supply that stopped growing | Buy second-hand ships, because they are cheap and available now |
| Peak | Reach several times the running cost, with no spare ships anywhere | Order new ships, and pay a peak price for them |
| Collapse | Fall as the ordered ships arrive while demand has cooled | Discover that they all ordered new ships at the same time |
The stages always come in the same order, but their length varies: a trough can last years and a peak can last weeks. Do not trust anyone who says a cycle has a fixed length, because the cause is regular but the timing is not.
Three cycles running at once
The rate on the screen is the result of at least three different cycles at once. Separating them is most of the skill of reading a market.
- Seasonal. Grain harvests, the ice season, the monsoon, coal demand in the northern winter, the two weeks around Chinese New Year. These repeat and are known in advance, and a desk that does not allow for them will read a completely normal January as a collapse.
- Short cycle. The four stages above, driven by the orderbook (ships on order) and by demand growth. This cycle decides whether an owner makes money over a few years.
- Long structural shifts. A trade route opening or closing, a change of fuel, a country building up its industry. These change which ships are wanted, not how much they earn, and they take decades.
Supply is less fixed than it looks
The number of ships is fixed, but their capacity is not. Three things change the real supply without a single ship being built or scrapped.
Speed. When the whole fleet sails slower, more ships are needed to carry the same cargo. When it sails faster, fewer ships are needed. When rates are high, the extra fuel cost of going faster is worth paying. So real supply rises exactly when the market least wants it to. This is the fastest way that supply changes in shipping, and a count of ships does not show it.
Distance. Cargo is measured in tonnes, but demand for ships is measured in tonne-miles (tonnes multiplied by the distance carried). If ships are sent the long way round, supply falls without one extra tonne moving. Two markets can carry the same amount of cargo and need very different numbers of ships.
Idle time. Congestion, waiting for a berth, quarantine, waiting for repairs. Ships waiting at anchor are out of the market. While they wait, the effect is the same as if they had been scrapped. This is why port waiting time shows up in a voyage estimate and in the freight market at the same time.
Where the money is actually made
A single fixture earns a margin. The big gains come from the cycle, through the price of the ship rather than the freight rate. A ship bought at the bottom and sold at the top can return more than it ever earned carrying cargo. A ship bought at the top can lose more than its freight will ever earn back. The freight market, the second-hand market and the demolition market work as one system. Rates set what a ship is worth, its value sets how much the owner can borrow against it, and the scrap price sets the lowest level for both. Sale and purchase and ship recycling and demolition cover the other two parts of the same subject.
This is also why the cycle corrects itself instead of running out of control. At the bottom, an owner whose ship is due for a special survey (a major class inspection) compares the shipyard bill with what a demolition buyer will pay. The weakest ships go for scrap, so supply falls exactly when earnings are worst, and that is the start of a recovery that nobody can see yet.
What a broking desk should take from this
Not a forecast. Nobody can reliably predict the turn, and the confident people who try are only remembered when they happen to be right. The cycle is useful for judging where you are:
- Know which stage each side of the negotiation assumes. An owner who holds out for last quarter's rate in a falling market makes the same mistake as a charterer who expects bottom-of-market rates in a recovery, only in the opposite direction.
- Watch the orderbook, not the mood. Ships on order are the only supply figure that looks forward. The figure is public, and these ships are what end 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. Memory makes the peaks look smaller and forgets the troughs. A fixture book does not.
- Do not confuse a season with a turn. The most common misreading of a market is to treat a normal yearly pattern as a change of direction.
The plain conclusion is that timing is a matter of discipline, not talent. The owners who survive several cycles are not the ones who guessed best, but the ones who did not buy or order ships at the peak and still had cash at the bottom.
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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