Coffee is one of the most widely traded soft commodities in the world, and its price can swing more than many people expect for something sold by the cup. Behind every flat white is a global supply chain that runs from farms in Brazil, Vietnam and Colombia to roasters in Europe and North America. For traders, coffee is a good example of how weather, currencies and stock levels combine to move a market.
Two very different beans
There are two main types of coffee traded on futures markets. Arabica is the higher-quality bean, grown at altitude and prized for its flavour. It trades on ICE Futures US in New York. Robusta is hardier, higher in caffeine and widely used in instant coffee and espresso blends. It trades on ICE Futures Europe in London.
The two can move differently. A drought in Brazil hits arabica hardest, while problems in Vietnam, the largest robusta producer, matter more for robusta. The price gap between them can also influence demand, as roasters adjust blends when one becomes much more expensive. Our introduction to soft commodities puts coffee in context alongside cocoa, sugar and cotton.
Weather is king
More than anything, coffee is a weather market. Coffee trees take several years to mature, so supply cannot respond quickly to higher prices. A frost, a drought or unusually heavy rain in a key growing region can damage a crop for more than one season.
Brazil is the single most important producer, and its winter, which runs roughly from June to August, is the period when frost risk is watched most closely. Forecasts of cold snaps can lift prices before any damage is confirmed, which is a reminder that futures markets trade expectations as much as facts. Weather patterns such as El Niño and La Niña are also watched because they can change rainfall across several producing countries at once.
Stocks, shipping and the supply chain
Futures exchanges keep track of certified stocks, which are coffee beans stored in approved warehouses that meet the quality standard for delivery against contracts. When certified stocks fall to low levels, it suggests tight supply and can support prices, especially for nearby contracts.
Shipping matters too. Disruption to major trade routes, port congestion or higher freight costs can delay deliveries and push up the price consumers pay. Regulation is another factor. Rules on deforestation-free supply chains, for example, can affect which beans are acceptable in certain markets and add cost along the way.
The currency effect
Coffee is priced in dollars, but much of it is grown in Brazil, so the Brazilian real plays an important role. When the real weakens against the dollar, Brazilian farmers receive more local currency for every bag they sell. That can encourage them to sell more, adding supply and weighing on dollar prices. A stronger real can have the opposite effect.
More broadly, a strong dollar tends to make commodities more expensive for buyers using other currencies, which can soften demand over time.
Demand is steady but not fixed
Global coffee consumption tends to grow slowly and steadily, supported by rising demand in emerging markets such as China. Demand rarely collapses, because coffee is a daily habit for so many people, but very high prices can lead roasters to change blends, shrink pack sizes or pass on costs that eventually curb consumption at the margin.
Speculative positioning also matters. Funds can build large positions in coffee futures, and when they all try to exit at once, moves can be exaggerated. The Commitment of Traders report is one way to see how crowded a market has become.
What this means for traders
Coffee can be volatile, with sharp moves on weather headlines and thin liquidity at times compared with major financial markets. Anyone trading it through spread bets or CFDs should check the contract they are trading, including expiry dates and how rollovers are handled, as well as spreads and margin requirements. Position sizing needs extra care, because a weather scare can move prices by several per cent in a session.
Bringing it together
Coffee prices are driven mainly by weather in a few key countries, slow-moving supply, stock levels, the Brazilian real and the dollar, with speculative flows amplifying the moves. The second-order lesson is that supply cannot respond quickly, so shocks can echo through prices for longer than you might expect.
If you are thinking about trading commodities and want to know whether your risk habits are ready, our free trader assessment is a useful place to start.
