Cocoa Contango Explained: What December–March Spreads Tell You
6 min read · Public
Understand cocoa contango, backwardation and calendar spreads with worked examples. Learn what a widening December–March gap means—and why it is not automatic profit.
A cocoa futures price tells you what one delivery month is trading at. The difference between delivery months asks another question: how does the market value earlier availability relative to later availability?
That distinction becomes useful during a sell-off. Both December and March can fall, yet December can weaken more. Looking only at the headline price misses that change in their relationship.
This article explains how to read it using invented examples. It does not claim that the illustrative spread is today's executable market, nor that any curve shape guarantees a profitable trade.
What contango and backwardation mean
In an upward-sloping part of a futures curve, a later delivery month is priced above an earlier one. Traders commonly describe that relationship as contango. In backwardation, the earlier month trades above the later month.
A curve can have different shapes between different pairs. December–March may behave differently from March–May. Always name the contracts and the subtraction convention instead of saying only that “the spread widened”.
Here we define the spread as December minus March. Negative values mean December is cheaper than March; positive values mean December is dearer. Other screens may reverse the order and therefore reverse the sign.
A worked calendar-spread example
Hypothetical example · USD per tonneVISUAL EXPLAINER · ILLUSTRATION
A wider nearby discount can accompany falling prices
A wider nearby discount can accompany falling prices
Observation
December
March
December minus March
First snapshot
$5,000
$5,100
−$100
Second snapshot
$4,800
$4,950
−$150
Spread change: −$150 − (−$100) = −$50 per tonne
Illustrative figures, not current quotes. Both contracts fell, but December fell more. The spread alone does not prove a physical surplus or create an automatic rollover profit.
Invented simultaneous quotes
December
March
December minus March
Observation A
$5,000
$5,100
−$100 per tonne
Observation B
$4,800
$4,950
−$150 per tonne
Change
−$200
−$150
−$50 per tonne
Both contracts fell. December fell more, so its discount widened from $100 to $150. That shows relative weakness in the earlier month in this example. It does not prove a global surplus or identify a particular trader's motive.
Now imagine a third observation at December $4,850 and March $4,950. The spread returns to minus $100. Nearby pricing strengthened relative to March even though December remains below its original $5,000 level.
This is why the outright price and the spread should be recorded separately. One describes a price level; the other describes a relationship between two levels.
Why a later contract can cost more
Storing a physical commodity involves time and resources. Financing, storage and insurance can influence the relationship between immediate and deferred availability. The value of having usable material now can work in the other direction.
Those relationships are not a simple calculator for every cocoa contract. Deliverable quality, location, seasonality, credit, transport and access to stocks matter. Two participants may face different practical costs.
A visible premium in a later month is therefore not automatically a risk-free opportunity to buy beans, store them and deliver later. Real physical transactions require the right material, documentation, facilities and funding.
What a widening discount might suggest
If nearby cocoa becomes cheaper relative to deferred delivery, one possible interpretation is that immediate supply is less urgently sought than later supply. Elevated accessible stocks or weaker near-term processing requirements could be consistent with that interpretation.
But consistency is not proof. The relative price can also reflect changes in expectations for a later crop, positioning around expiry or execution conditions. A single observation cannot separate those explanations.
Use a sequence of matched observations. Compare each pair at the same time or use the same day's settlement methodology. Mixing an early December quote with a later March quote can manufacture a spread movement that never existed simultaneously.
Connecting the curve with inventories
Stocks and spreads can complement one another because they describe different aspects of availability. A warehouse total is a quantity within a defined reporting network. A calendar spread is a traded price relationship.
Evidence combination
A useful question
Stocks build and nearby discount widens
Is the immediate supply cushion becoming easier?
Stocks fall and nearby discount narrows
Is earlier availability becoming more valuable?
Stocks rise but nearby premium strengthens
Are location, quality or delivery eligibility important?
Curve changes without a new stock report
Are expectations, positioning or timing driving the adjustment?
The table is a research framework rather than a directional signal system. Check total versus certified stocks, reporting dates and whether the inventory pool is relevant to the exchange contract being analysed.
Rolling a long position does not create an instant spread loss
Suppose an invented December long was entered at 5,200 and closed at 5,000. With a ten-tonne futures multiplier, its gross result is minus $2,000. A new March long opened at 5,100 begins from that new execution price.
If March later closes at 5,000, the second leg loses $1,000. The combined gross loss is $3,000 before costs. The later loss arose because the held March contract fell after entry; the act of opening at a higher price did not itself realise that entire difference.
Repeated exposure to a curve can nevertheless affect returns over time. If a purchased deferred contract subsequently converges downward while other conditions are unchanged, that movement hurts a long holder. Actual prices and curve shape change, so this conditional mechanism is not a guaranteed return.
Use the rollover calculator to keep the old and new legs separate. Broker CFD adjustments must be incorporated according to the broker's own terms.
Spread trades have their own risks
A position long December and short March is exposed to their relative change. In the first example, December minus March moves from minus $100 to minus $150. A one-for-one ten-tonne pair would lose $500 gross from that movement before costs.
This is not the same as a simple long cocoa position. It also is not risk-free because the legs concern the same commodity. Execution timing, liquidity, delivery obligations and changing margin requirements can matter.
For readers learning the market, recording the relationship without trading it can be valuable. Keep a journal of the pair, quote basis, stock report date and proposed explanation, then review whether later evidence supports that explanation.
Common questions
Does contango mean cocoa must fall?
No. Both contracts can rise while the later one remains more expensive. Curve shape and outright direction are different observations.
Is backwardation a guaranteed sign of a global shortage?
No. Earlier delivery may be particularly valuable for a specific location, grade or period without proving a worldwide annual deficit.
Can I compare London December with New York March?
That mixes exchanges, currencies and months. It is a different comparison requiring additional adjustments, not the same-exchange calendar spread explained here.
Published research and personal commentary, not personalised investment advice. Trade ideas can fail; evaluate the assumptions and dated follow-ups. The original published post is preserved.