Futures Basis, Term Structure and Roll Return: What Actually Changes Your P&L?

A spot quote of 100, a nearby future at 102 and a deferred future at 105 describe several relationships at once. They do not tell you that a futures position has already lost money, or that the spot price must rise to 105. To interpret the screen, separate the cash–futures basis, the curve across delivery months and the profit earned while holding particular contracts.

The examples use hypothetical prices to explain these distinctions. Before comparing any actual quotes, establish the exchange, delivery month, contract multiplier, currency and physical specification.

Write the basis convention beside the number

Here, basis means cash price minus the price of a specified futures contract, a common convention in commodity hedging. Cash at 100 and the nearby future at 102 give a basis of −2. Against the deferred future at 105, the same cash quote gives −5. A basis observation therefore needs both a cash reference and a contract month.

Some financial futures materials use the opposite subtraction: futures minus spot. Their +2 can describe precisely the relationship called −2 here. Converting conventions matters more than memorising whether a positive number is supposedly bullish. In this article, strengthening means the cash-minus-futures value increases, including a move from −5 to −2.

That can happen in a falling market. If cash drops from 100 to 94 while futures fall from 105 to 96, the basis strengthens from −5 to −2 even though both prices decline. Cash has become stronger relative to futures, not more expensive in absolute terms.

Cash is not necessarily a single universal quote. Location, grade, freight, storage and delivery terms can produce different prices for the same commodity. Currency and unit conversions create further work when comparing markets. A local quote minus an unrelated “most active” future may measure specification differences rather than a tradable discrepancy.

A futures curve is a cross-section, not a forecast path

The term structure arranges different delivery months at one observation time. Prices of 102, 105 and 107 form an upward-sloping section; 105, 102 and 100 form a downward-sloping one. A curve can also rise and then fall. Describe the segment under examination instead of assigning the whole market a label from one spread.

For storable commodities, financing, storage and insurance can support higher deferred prices. When immediately available material keeps a factory operating, the benefit of holding physical inventory can support the front of the curve instead. Seasonality, harvest transitions and delivery arrangements complicate both cases. A more expensive deferred contract is not a promise that future cash prices will reach its current quote.

A claim of immediate supply tightness becomes more persuasive when several nearby spreads strengthen, deliverable inventories fall and physical transactions or delivery lead times tell a similar story. A spike confined to one expiring contract, without support from other months or cash markets, calls for an examination of delivery constraints and liquidity.

Financial assets require their own explanations. Equity index futures reflect financing and expected dividends; currency futures involve the two currencies' interest rates and the quotation convention. Commodity storage logic should not turn an ordinary dividend-related index basis into a prediction of falling shares.

Convergence does not freeze today's cash price

Delivery and settlement mechanisms constrain the relationship between an expiring future and its relevant cash asset or index. Physical delivery and arbitrage encourage alignment; a cash-settled contract uses its specified final settlement benchmark. Neither mechanism says futures must fall to the cash price observed today.

Starting with cash at 100 and futures at 105, the two might meet around 100 or around 110 at expiration. The first path loses money for the futures buyer; the second makes money. The initial basis alone does not choose between them. A distant local cash market can also retain transport or quality differences from the delivery reference.

Storage capacity, financing, transport schedules, delivery eligibility and difficulty shorting physical goods can restrict arbitrage. A discrepancy between two closing series is insufficient evidence of a risk-free trade. Both sides must be executable under compatible specifications, and the entire cost of carrying out the transaction must fit inside the apparent spread.

The roll spread is not an immediate account debit

Maintaining a futures exposure usually requires closing an old contract and opening a later one. Roll return is a way of analysing how a continuing futures position performs relative to the spot price. Although related to the curve, it should not be booked mechanically as the difference between two separate contracts on the roll date.

Assume one hypothetical contract represents one unit of the asset. Keep one contract throughout and ignore fees and cash interest. You originally buy the nearby future at 102. On the roll date it trades at 100 and the deferred contract at 104. Closing the nearby position realises a loss of 2. Opening the deferred contract at 104 starts a new position with zero profit or loss at its execution price. The 4-point difference between 100 and 104 is not an additional immediate loss.

Now suppose cash remains at 100 and the deferred contract falls from 104 to 100 as expiration approaches. The new position loses 4, bringing the two-contract loss to 6. Those four points were lost through the subsequent movement of the contract actually held. If cash and the curve's shape remain sufficiently stable, repeatedly holding the long side of an upward-sloping curve can create this sort of drag; a downward-sloping curve can provide a favourable contribution.

Change the subsequent path and the answer changes. If the new contract is bought at 104 but settles at 112 after cash prices rise, it earns 8. After the old contract's loss of 2, the combined gain is 6. Buying a more expensive deferred month therefore does not guarantee a loss, just as a cheaper deferred month cannot protect against a large fall in the underlying.

Return percentages require an explicit denominator. Holding a fixed contract count differs from maintaining a fixed notional exposure; dividing profit by margin introduces leverage. A fully funded strategy may also earn interest on collateral, while fees and slippage reduce its outcome. Spot returns, quoted roll spreads and margin returns cannot simply be added as if measured on the same capital base.

For a hedger, basis determines part of the final cash result

Consider a producer intending to sell one unit of a commodity. The producer sells futures at 105 and expects a basis of −3 when the physical sale takes place, implying an effective selling price near 102. At the sale date, cash is 96 and futures are 98. Cash proceeds are 96; the short future earns 105 − 98 = 7. The effective selling price is 103.

This can be written as effective selling price = initial futures sale price + basis at the physical sale: 105 − 2 = 103. A basis one point stronger than expected improves the result by one point. If futures remain at 98 but local cash is only 92, the basis is −6 and the effective selling price is 92 + 7 = 99.

A buyer using a long hedge has an effective purchase cost equal to the initial futures purchase price plus the basis when cash is bought. A stronger basis therefore raises that buyer's cost. These identities assume matched quantities and units, simultaneous closing of cash and futures transactions, and no expenses. Quantity changes, date mismatches and cross-hedging leave additional exposures. Every intervening roll also needs its own profit calculation.

Check the contract behind a gap on a continuous chart

A series that switches from a nearby contract at 100 to a deferred contract at 104 can show a four-point jump without either contract having rallied. An adjusted continuous series can remove that discontinuity, but its historical levels may no longer be prices that were actually available for trading.

Use a clearly defined continuous series to study trends, and actual contract executions to calculate position profit. The accompanying guide to volume and open interest helps distinguish activity migrating between months from participation disappearing across the market.

A useful record preserves the cash quotation terms, contract-month prices, adjacent spreads, position sizes and each roll execution. That lets you reconcile three different statements: cash strengthened relative to futures, delivery months repriced, and the account earned or lost a particular amount. Agreement between those records is more valuable than a directional label attached to the curve.