There are weeks when the price of green coffee beans in the Central Highlands jumps by several thousand dong per kilogram, triggering a chain reaction from the plantation to the morning cup of coffee. Coffee price fluctuations are not random: they originate from two exchanges in London and New York, then are transmitted to Vietnam through a price difference known as a backwardation. This article explains this mechanism, identifying who suffers losses at each link in the chain and the tools businesses use to protect themselves.
1. Where are World Coffee Prices Determined?
Global benchmark coffee prices are not determined by growers or roasters, but rather by two commodity futures exchanges. Robusta is traded on ICE Futures Europe in London, quoted in US dollars per ton. Arabica is traded on ICE Futures US in New York, quoted in US cents per pound. Buyers and sellers on these exchanges largely do not take physical delivery: they are hedge funds, importers, large roasters, and hedging entities. Therefore, prices reflect not only physical supply and demand but also expectations, speculative capital flows, and exchange rate fluctuations. Each contract is tied to a specific delivery month, and the most recent active month is usually used as a benchmark when parties finalize the price for the actual shipment.
2. London Exchange and Robusta Futures Contracts
London is the home market for robusta, making it the platform that Vietnamese coffee growers monitor most closely. The dollar-denominated price per ton allows for fairly direct conversion to domestic prices. In the last two crop years, robusta prices have been significantly higher than in previous periods: the March 2026 contract was recorded at around $3,917 per ton in mid-January 2026, then dropped to around $3,725 per ton in August of the same year. This level is still many times higher than the low levels of a few thousand dollars in the previous decade. This is due to increased demand for instant coffee and espresso blends, while robusta supply in many countries is hampered by weather conditions. When London prices rise, bulk green coffee prices in the Central Highlands usually react within one to two days.
3. New York Exchange and Arabica Futures Contracts
New York prices for arabica coffee are most strongly influenced by Brazil, the world’s largest producer. The quoted unit is US cents per pound, so to compare it to robusta, you have to convert: multiply the cents per pound price by approximately 22.05 to get the dollar price per ton. The March 2026 contract was at 356.05 cents per pound, while the August 2026 contract recorded around 344.5 cents. In terms of conversion, arabica is still about twice as expensive as robusta. It’s important to note that the two exchanges don’t move independently. When arabica becomes too expensive, large roasters increase the proportion of robusta in their blends, driving up demand and robusta prices. Conversely, when arabica prices cool down, the pressure to replace it decreases. This is why robusta traders still need to monitor developments on the New York exchange.
4. What do Discount Pricing and Bonus Pricing mean?
The price on the floor is a reference price, not the final price of the actual shipment. The difference between these two figures is called the differential. If the actual goods are sold at a price lower than the floor price, it’s called a discount; if it’s higher, it’s called a bonus. The simple formula is: contract price equals floor price plus or minus the differential. For example, if the London price is $2,500 per ton and the discount is $120, the price you receive is $2,380 per ton. This differential depends on the quality of the goods, the percentage of broken or black kernels, moisture content, the port of delivery, shipping costs, and the supply and demand at the time of delivery. When goods are scarce, the discount narrows or turns into a bonus; during peak season and when goods are abundant, the discount usually widens.
5. Weather, Inventory, and Crop Cycles
Three fundamental factors dominate the long-term trend. Weather tops the list: frost or drought in Brazil’s arabica-growing regions could send prices soaring for several sessions, while prolonged, unseasonal rains in the Central Highlands of Vietnam cause fruit drop and hinder harvesting, affecting both yield and quality. Certified inventories at the two exchanges are a daily monitored indicator, as low inventories mean the market lacks cushion in the event of a supply shock. The third factor is the crop cycle. Global coffee production is projected to increase from approximately 175.4 million bags in the 2024–2025 crop year to around 179 million bags in the 2025–2026 crop year, with Brazil’s harvest at a record level. The recovery in supply is the reason many forecasts lean towards a cooling trend in prices in 2026.
6. Coffee Price Fluctuations Affect Farmers
Farmers are the most vulnerable link in the chain because their income depends almost entirely on a single commodity and a single crop season. When prices rise, the price of raw coffee beans in the Central Highlands sometimes reached around 99,000 VND per kilogram in August 2026 before falling to around 94,300 VND in mid-September, while fresh coffee cherries were purchased at around 23,000 to 25,000 VND per kilogram in the previous season. High prices create a mentality of holding onto stock while waiting for higher prices, and this is a double-edged sword: if prices reverse, expected profits evaporate very quickly. Conversely, prolonged low prices cause farmers to cut back on fertilizer and labor, resulting in reduced yields in the following season, creating a vicious cycle. The practical way to reduce risk is to sell in multiple installments instead of all at once.
7. Purchasing Agents and Risks of Post-Price Contracts
The intermediate layer between the farm and the exporter is where price risk easily turns into default risk. A common and controversial form over the years is the “delivery first, price later” contract: the seller delivers the coffee and retains the right to fix the price at a later time. If the price goes up, the seller benefits, but if the price plummets while the goods are already in the buyer’s warehouse, the losses can exceed their ability to bear. Many chain defaults by dealers in the industry’s history have stemmed from this structure combined with the use of leveraged debt. The principle of safety is to only keep the unfixed price position at a level commensurate with equity capital, set a stop-loss threshold, and absolutely not use short-term loans to fuel expectations of rising prices.
8. How Does the Roastery Withstand the Pressure of Raw Materials?
For coffee roasters, green coffee beans typically account for a large portion of the cost of goods sold, so every time the market experiences a sharp increase, the pricing strategy is re-evaluated. The difficulty lies in the time lag: supply contracts with cafes and distribution channels usually have fixed prices on a quarterly or annual basis, while raw material prices change weekly. When raw material prices rise faster than the rate of price adjustments, profit margins are directly eroded. Common responses include purchasing and stockpiling green beans for several months of production, adjusting blending formulas to increase the proportion of cheaper raw materials while maintaining the flavor profile, or changing packaging. A more sustainable approach is to sign long-term contracts with fixed raw material suppliers and accept stable prices in exchange for the ability to forecast costs.
9. Coffee Shops and the End Consumer
At the final stage, the impact of raw material prices is significantly diluted. In the cost structure of a cup of coffee sold at a cafe, the cost of coffee powder is usually only a small fraction compared to rent, staff, utilities, and equipment depreciation. That’s why while the floor price may increase by several tens of percent, the price of a cup of coffee at a cafe usually doesn’t increase proportionally, or increases much more slowly over several months. Instead of raising prices directly, cafes often adjust in more subtle ways: reducing the amount of powder, switching to a blend with a higher proportion of robusta, scaling back promotions, or adding a line of drinks with better profit margins. For the drinker, the clearest sign isn’t the price list, but the change in the familiar taste of the coffee they usually order.
10. How Businesses Can Mitigate the Risks of Coffee Price Volatility
No one can predict prices, but everyone can manage their exposure. The most basic tool is a forward contract on the exchange: exporters holding physical goods can short-sell the corresponding contract to lock in the price, so that losses in inventory are offset by gains on the exchange and vice versa. For small businesses without access to the exchange, an alternative is to split transactions into multiple tranches to average the price, sign fixed-price contracts with output before purchasing raw materials, and maintain inventory levels just sufficient for the production cycle. Three principles to remember: do not let open positions exceed equity capital, always separate hedging from speculation, and record all open price positions to know how much risk you are actually taking.