Why Futures Prices Are Not Forecasts of the Future Spot Price

It is tempting to read a rising futures price as the market's prediction that an asset is headed higher, but that conflates two different things: a no-arbitrage price set by financing costs today, and a forecast of where the spot price will land. Confusing the two leads investors to misread routine contango or backwardation as a directional signal it was never meant to carry.

By Karanvir Singh, founder of Quantix Invest

Two different questions the futures price could be answering

A futures price answers a narrow, mechanical question: what delivery price today makes a futures contract worth exactly zero to enter, given the cost of financing and storing the underlying asset until expiration? That is the cost-of-carry relationship, and it is enforced by arbitrage: if the quoted futures price drifts away from spot price plus carrying costs, a trader can borrow, buy the spot asset, sell the futures, hold to expiration, and lock in a riskless profit, an activity that pulls the futures price straight back to fair value. Nothing in that calculation requires anyone to have an opinion about where the asset is actually headed.

The expected future spot price answers a completely different question: what does the market, in aggregate, believe the asset will actually be worth at the delivery date? That number depends on genuine information and genuine uncertainty about supply, demand, growth, and risk, and it has no reason to equal the cost-of-carry futures price unless the asset carries zero systematic risk, meaning its returns are uncorrelated with the broader market. For any asset whose price does move with the market, a wedge opens up between the futures price and the expected future spot price, and the size and direction of that wedge is set by the asset's required risk premium under a standard capital asset pricing model framework.

It helps to name the two participants who typically sit on opposite sides of this wedge. A commercial hedger, such as a producer locking in a sale price ahead of harvest or extraction, is not trying to earn a risk premium; the hedger is trying to eliminate uncertainty about revenue and is often willing to accept a slightly worse expected price in exchange for that certainty. A speculator taking the other side of that trade is, in effect, being paid to absorb price risk the hedger does not want to carry. The futures price that clears the market between these two motivations is therefore a genuine equilibrium price, not an arbitrary number, but it is an equilibrium built around risk transfer, not around forecasting accuracy.

The math: pricing a positive-beta asset's futures contract

Consider oil, an asset whose price historically has moved somewhat with the broader economy and therefore carries positive systematic risk. Suppose the market expects the spot price of oil one year from now, E(P_T), to be $85 per barrel. Oil's estimated beta as an investment is 0.6, the equity market risk premium is 6%, and the risk-free rate is 4%. Under the capital asset pricing model, the required return on holding oil outright for a year is r = 4% + 0.6 × 6% = 7.6%.

Today's fair spot price, S_0, is the expected future price discounted at that required return: S_0 = 85 / 1.076 = $79.00. The one-year futures price, by contrast, is set purely by cost of carry off that spot price, using only the risk-free financing rate since holding a futures position (unlike holding the physical barrel) ties up no capital and earns no risk premium of its own: F_0 = S_0 × (1 + 4%) = 79.00 × 1.04 = $82.16.

Compare the two numbers. The futures price, $82.16, sits $2.84 below the expected future spot price of $85.00, a gap of roughly 3.5%. That gap is not noise or mispricing; it is the risk premium investors demand for being long a positive-beta asset, transferred entirely into the relationship between today's futures quote and tomorrow's expected spot price. An investor who buys the futures contract today is, in effect, being paid an expected 3.5% return over the year for bearing oil's systematic risk, exactly as the capital asset pricing model prescribes, even though the futures position itself required no upfront capital.

A second example: a negative-beta hedge asset

Now flip the sign of the risk exposure. Consider an asset that tends to do well precisely when the broader market does poorly, giving it a negative beta, the profile of a genuine portfolio hedge rather than a directional bet. Suppose a metal used mainly as a safe-haven store of value has an expected spot price in one year of $2,000 per ounce, an estimated beta of -0.3, and the same 4% risk-free rate and 6% market risk premium as before. Its required return is r = 4% + (-0.3) × 6% = 2.2%, below the risk-free rate, because investors are willing to accept a lower return in exchange for the diversification benefit the asset provides.

Today's fair spot price is S_0 = 2,000 / 1.022 = $1,956.95, and the one-year futures price, again set purely by risk-free financing cost, is F_0 = 1,956.95 × 1.04 = $2,035.23. This time the futures price sits above the expected future spot price, by about $35, or 1.8%. A buyer of this futures contract is accepting a small expected loss relative to the anticipated spot price, the mirror image of the oil example, because the asset itself is valuable as insurance and investors are willing to pay for that insurance rather than demand compensation for holding it.

Put the two results side by side: identical financing assumptions, identical cost-of-carry mechanics, yet one asset's futures price sits below its expected future spot price and the other's sits above it, purely because of the sign of the beta. That contrast is the entire content of the distinction between a futures price and a price forecast.

What the evidence shows about backwardation and contango

This framework has a long pedigree in commodity markets under the name normal backwardation, the observation that futures prices for commodities dominated by hedging producers, historically agricultural crops and energy, tend to sit below the expected future spot price, because producers are natural short-sellers of futures to lock in revenue and must offer speculators a discount to take the other side of the trade. The theory of normal backwardation predates the modern capital asset pricing framework but produces the same qualitative prediction: an asset whose futures buyers are compensated for bearing risk should price below its expected future value.

The empirical record on commodity futures risk premia is genuinely mixed and regime dependent. Multi-decade studies of broad commodity futures indexes have found modestly positive average long-only returns over some long windows, consistent with a positive risk premium on average, but the premium has shown meaningful variation by commodity, by decade, and by the underlying supply-demand balance at the time; some individual commodity futures have shown persistent contango rather than backwardation for extended stretches, particularly when storage is abundant and near-term supply exceeds demand. A structural shift after the early 2000s, often described as the financialization of commodities, brought a large wave of index-based investment flows into commodity futures markets and appears to have compressed backwardation in several markets by adding a steady stream of long-only buying pressure that had not existed at that scale before.

For currencies, the analogous relationship is called the forward premium puzzle: uncovered interest parity predicts that a currency's forward price relative to spot should reflect the market's unbiased expectation of the future spot rate, adjusted for the interest rate differential, yet the empirical record shows currencies with higher interest rates have historically tended to depreciate less than the differential implies, and sometimes even appreciated, a persistent anomaly that has supported currency carry-trade strategies for decades despite their well-documented vulnerability to sudden, sharp reversals.

Applying this to a real portfolio

The practical takeaway for anyone reading futures market data is to stop treating a futures curve's shape as a crystal ball. When crude oil futures for later delivery months trade above the nearest contract, financial commentary routinely describes the market as "expecting" higher prices; often it simply reflects the ordinary cost of storing and financing oil, or occasionally a change in the convenience yield of holding physical barrels, with no directional forecast embedded at all. The correct question to ask of any futures curve is not "what does this predict" but "what does the shape of this curve imply about financing costs, storage costs, and the risk premium investors are demanding right now," a subtler and more useful question.

This distinction also matters directly for anyone using futures, or futures-based exchange-traded products, to gain exposure to an asset class. If a commodity's futures curve is in contango because of a genuine risk premium related to systematic risk, a long-only futures investor should expect a modest structural drag relative to simply tracking the spot price, since the entry price embeds financing costs the spot price never charges directly. Recognizing that the drag comes from the well-understood mechanics of cost of carry, rather than from some mysterious market inefficiency, changes how an investor should think about sizing and holding period for that exposure.

Actionable breakdown

• Separate the futures price from the price forecast question.
  • Futures prices are set by arbitrage and financing cost, not belief.
  • Expected future spot price is a genuine, uncertain forecast.
• Use beta to predict the direction of the gap.
  • Positive-beta assets should price below their expected future value.
  • Negative-beta hedge assets should price above their expected future value.
• Read curve shape correctly before acting on it.
  • Contango or backwardation often reflects carry cost, not a forecast.
  • Isolate the risk-premium component before treating a curve as a signal.
• Account for structural drag in long-only futures exposure.
  • Contango can erode returns for buy-and-hold futures positions.
  • Size futures-based exposure with this drag explicitly in mind.

Common pitfalls

The most common pitfall is treating any upward-sloping futures curve as bullish and any downward-sloping curve as bearish. Both shapes can arise purely from financing and storage mechanics with zero directional content, and conflating shape with forecast leads to trades built on a misreading of what the price is actually telling you.

A second pitfall is ignoring how quickly risk premia can change sign or magnitude. An asset's beta, and therefore its risk premium, is not a fixed constant; it can shift with the economic environment, and a commodity that behaved like a hedge asset in one decade can behave like a cyclical, positive-beta asset in the next, changing the entire relationship between its futures price and its expected spot price.

A third pitfall is assuming the forward premium puzzle in currency markets means carry trades are reliably profitable. The historical tendency for high-rate currencies to underperform their interest-rate-implied depreciation has coexisted with sharp, sudden reversals during periods of market stress, when carry trades have historically unwound violently and simultaneously across many currency pairs, erasing years of steady gains in a matter of weeks.

A fourth pitfall is applying a single-factor beta model too literally to assets whose systematic risk is genuinely unstable over time. A commodity's correlation with the broader market can shift with the macroeconomic backdrop, rising during periods when growth expectations dominate price action and falling during periods when idiosyncratic supply shocks dominate instead, so a beta estimated over one historical window may say little about the risk premium embedded in today's futures price.

The bottom line

A futures price is a financing calculation enforced by arbitrage, and only the gap left over after accounting for cost of carry reflects a genuine market forecast or risk premium.

Related reading: derivatives fundamentals, how futures prices are determined, the futures contract, commodity futures pricing in depth, futures market strategies.

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