Futures Contracts

1865: A Farmer, a Grain Elevator, and a Problem

To understand why futures contracts exist at all, it helps to start not with a trading screen but with a wheat farmer in rural Illinois in the 1860s. He plants in spring, and if the weather cooperates, he harvests in autumn. Between those two dates, he has no idea what wheat will be worth when he finally has something to sell. If the harvest across the Midwest is unusually large that year, prices can collapse by the time his crop is ready — a flood of grain hitting Chicago's elevators all at once, overwhelming demand. If the harvest is poor elsewhere, prices might spike, and he'll wish he'd planted more. Either way, the one thing he cannot do is control the outcome, because the price is set months after the decision that determines his income — the decision to plant — has already been made.

The Chicago Board of Trade, founded in 1848, grew directly out of this problem. Grain merchants and farmers began striking private "to-arrive" contracts: an agreement, made in spring, to deliver a specific quantity of wheat in autumn at a price agreed today. By 1865, the exchange had formalised these agreements into standardised, exchange-traded contracts — fixed quantities, fixed quality grades, fixed delivery dates and locations — and required traders to post a good-faith deposit to guarantee performance. That deposit is the direct ancestor of what we now call margin. The standardisation is the direct ancestor of every futures contract traded today, whether it settles in barrels of crude oil, ounces of gold, or points on a stock index.

It is worth pausing on why private "to-arrive" contracts alone were not enough, and why an exchange had to step in. A farmer agreeing a private deal with a single grain merchant faced an obvious problem: what if the merchant simply refused to honour the agreed price come autumn, or had gone out of business by then? There was no mechanism forcing either side to perform, and no easy way for the farmer to find a replacement buyer if the original deal fell through. The Chicago Board of Trade's innovation was to interpose itself between every buyer and every seller, becoming the counterparty to both sides of every trade and requiring a margin deposit precisely so that a default by one trader did not become a default against the other. This is the origin of the modern futures clearinghouse, and it remains the structural reason futures carry far less counterparty risk than a private, bespoke agreement between two parties would.

What the farmer gained from this arrangement was not a better price — nobody can guarantee that — but certainty. He could sell a futures contract in spring, locking in a price for his autumn wheat regardless of what actually happened to the market between planting and harvest. If prices fell, he was protected; he'd already locked in the higher price. If prices rose, he gave up the upside, but that was the trade-off he chose in exchange for predictability. This single idea — paying for certainty by giving up the chance of a better outcome — is the entire reason futures markets exist, and it hasn't changed in a century and a half. What has changed is who uses them and for what: today the same contract structure protects airlines from fuel price spikes, lets central banks manage currency exposure, and gives algorithmic trading firms a liquid, leveraged way to express a view on an index at three in the morning. The mechanism is identical. Only the barrels, bushels, and basis points have changed.

What a Futures Contract Actually Is

A futures contract is a legally binding agreement to buy or sell a specific quantity of an asset, at a predetermined price, on a specific future date. The word that matters most in that sentence is binding. Unlike an option, which gives the holder a right they can choose not to exercise, a futures contract is an obligation on both sides. The buyer must buy. The seller must sell. Neither party gets to change their mind because the market moved against them — which is exactly why futures are considered a materially different, and in some ways riskier, instrument than options, even though the two are often mentioned in the same breath.

Every futures contract has two counterparties with opposite positions and opposite views, or at least opposite needs:

• The long position — the buyer, who agrees to purchase the underlying asset at the contract price on the expiry date. They profit if the price rises above the contract price, and lose if it falls below it.
• The short position — the seller, who agrees to deliver the underlying asset at the contract price on the expiry date. They profit if the price falls below the contract price, and lose if it rises above it.

Critically, these two positions are a zero-sum pair: every pound the long side gains is a pound the short side loses, and vice versa, before costs. This is different from owning a share, where the company itself can create value over time through growing profits — a futures contract creates no new value, it simply transfers price risk (and the associated gains and losses) between two parties who wanted different things from the same price movement.

Futures are almost always exchange-traded and heavily standardised. Rather than two parties negotiating a bespoke private contract (which would be illiquid and hard to verify), an exchange defines exactly what is being traded: the exact quantity (say, 1,000 barrels of crude oil, or 5,000 bushels of wheat), the quality or grade where relevant, the delivery location or settlement method, and the expiry date. This standardisation is what makes futures liquid — a December crude oil contract bought on Monday is identical to one bought on Tuesday, so they can be freely bought and sold between any two participants on the exchange, with the exchange's clearinghouse standing in the middle of every trade to guarantee performance.

The Mechanics: Margin, Mark-to-Market, and Rollover

Futures trading involves a handful of mechanical concepts that don't appear in ordinary share dealing, and all of them stem from the fact that a futures contract is a leveraged, daily-settled obligation rather than a simple ownership stake paid for in full upfront.

The daily settlement mechanic deserves particular attention because it's the single biggest practical difference between futures and most other instruments retail investors are used to. If you buy a share and it falls 20% over six months, your account simply shows an unrealised loss — nothing happens unless you sell. If you hold a futures contract and the underlying falls sharply in a single session, that loss is deducted from your margin account that same day, in cash, whether you wanted to realise it or not. This is why futures positions can generate margin calls far faster than an equivalent exposure through ordinary share ownership — the mechanism forces daily settlement regardless of your intentions.

Contract Specifications: What's Actually Being Traded

Futures exist on an enormous range of underlying assets, and each has its own contract specification — size, tick value, and margin requirement — set by the exchange. Understanding a few real examples makes the abstract definition concrete.

Notice the scale involved. A single E-mini S&P 500 contract represents a quarter of a million dollars of market exposure, controlled with a margin deposit that might be a small fraction of that — commonly in the range of $12,000–$15,000, though exact margin requirements move with volatility and are set by the exchange, not fixed permanently. A 1% move in the index therefore represents roughly $2,500 of profit or loss on a single contract — against a margin deposit many times smaller. This is leverage in its purest, most mechanical form, and it's worth sitting with that example before concluding that futures are simply "a way to trade an index."

Why the Futures Price Isn't the Same as Today's Price

A question that trips up almost everyone encountering futures for the first time: if a December crude oil futures contract settles based on the price of oil in December, why does it trade at a different price than oil trades at today? The answer is a concept called cost of carry, and it's genuinely simple once you see it laid out.

Imagine you wanted to guarantee delivery of oil in six months, and you had two ways to do it. You could buy a futures contract today for delivery in six months. Or you could buy the oil today at the spot price, pay to store it for six months, and simply hold it until you need it. In a competitive, well-functioning market, these two routes to the same outcome should cost roughly the same — otherwise everyone would take the cheaper route, and that buying pressure would push the two prices back toward each other. The futures price, in other words, tends to equal the spot price plus the cost of storing and financing the asset until delivery (storage fees, insurance, and the interest cost of tying up capital), minus any benefit of holding the physical asset itself (called the "convenience yield" — the value of actually having the oil in hand rather than a paper claim to it, which matters a great deal to a refinery that cannot run its operations on a futures contract).

When the cost of carry is positive and larger than any convenience yield — the normal situation for most storable commodities and financial assets — futures trade above spot, a condition called contango. When the convenience yield is unusually high, often because of a physical shortage or urgent near-term demand, futures can trade below spot, called backwardation. Financial futures (stock indices, currencies) follow a related but cleaner version of the same logic, based on interest rates and dividend yields rather than storage costs, since there's no warehouse involved in storing "the S&P 500." This is also precisely why the contango drag mentioned earlier in commodity ETFs exists: in a persistently contango market, a fund that must keep rolling into a more expensive next-month contract pays that cost of carry over and over, quarter after quarter, even if the spot price never moves at all.

Hedgers and Speculators: Two Very Different Reasons to Trade the Same Contract

Every liquid futures market depends on two types of participants who need each other even though they rarely think of it that way. Hedgers — the airline, the wheat farmer, the gold mining company, the multinational managing currency exposure — use futures to reduce an existing risk they already have from their underlying business. They are not trying to profit from the futures position itself; they're trying to cancel out a risk, and they're generally happy to give up some potential upside in exchange for protection against the downside.

Speculators — individual traders, hedge funds, proprietary trading firms, algorithmic strategies — have no underlying business exposure to hedge. They take futures positions purely because they believe the price will move in a particular direction, and they're willing to bear the risk that hedgers want to shed, in exchange for the chance of profit. Without speculators providing this liquidity and willingness to take the other side of hedgers' trades, futures markets would be far thinner and harder to enter and exit at a fair price.

This relationship is visible in a metric called open interest — the total number of outstanding futures contracts that haven't yet been closed out, delivered, or expired. Rising open interest alongside rising prices typically suggests new money is flowing into long positions with conviction; rising open interest alongside falling prices suggests the opposite. Open interest is published daily by exchanges and is one of the few genuinely useful pieces of "market sentiment" data that isn't just noise, because it reflects actual capital committed, not just opinions expressed.

Expiry, Settlement, and the Story of Negative Oil

Every futures contract has an expiry date, after which it stops trading and must be settled one of two ways: physical delivery, where the sold asset actually changes hands (the short delivers barrels of oil, bushels of wheat, or ounces of gold to the long), or cash settlement, where no physical asset moves and the difference between the contract price and the final settlement price is simply paid in cash. Stock index futures are cash-settled, since physically delivering "the S&P 500" is obviously meaningless. Many commodity futures, by contrast, do allow for physical delivery, and this distinction matters enormously if you ever hold a contract past its last trading day.

In April 2020, this mechanic produced one of the strangest events in modern financial history. As global oil demand collapsed in the early weeks of the pandemic and storage capacity around the delivery hub in Cushing, Oklahoma filled to near capacity, traders holding long positions in the expiring May WTI crude oil futures contract faced a genuine problem: they had no way to actually take delivery of, or store, the oil they were contractually obligated to receive. As the contract approached expiry, desperate holders paid other people to take the contracts off their hands — meaning the contract price briefly traded below zero, settling at around minus $37 a barrel. Sellers were, for a few hours, paying buyers to take oil off their hands rather than the other way around.

The lesson generalises well beyond that one unusual day: retail traders should essentially never hold a physically-settled futures contract into its expiry window. Professional commodity traders who want delivery have storage and logistics arranged in advance; everyone else closes or rolls their position well before the last trading day. Brokers typically force-close retail futures positions automatically as expiry approaches for exactly this reason, but understanding why that safeguard exists is more useful than simply trusting it.

From the Grain Elevator to the Trading Desk: Modern Users of Futures

The farmer who needed price certainty in 1865 has, in effect, been joined by an enormous and varied cast of modern users, all solving some version of the same problem.

Oil and energy companies use crude, natural gas, and refined product futures to hedge production and consumption, exactly like the airline example earlier — producers lock in a selling price for future output, and large consumers lock in a buying price for future needs.

Central banks and sovereign institutions use interest rate futures and currency futures as part of managing foreign exchange reserves and implementing monetary policy operations, hedging currency and interest rate exposure that arises from holding reserves in multiple currencies and duration profiles.

Pension funds and insurers use interest rate futures (and related derivatives like interest rate swaps) to manage the duration mismatch between long-dated liabilities (future pension payments, insurance claims) and the assets backing them — this is the same broad category of activity that, when poorly managed with excessive leverage, contributed to the UK gilt market stress of autumn 2022, when rapidly rising yields triggered margin calls on leveraged pension fund strategies and forced further bond sales, amplifying the very move they were trying to manage.

Algorithmic and high-frequency trading firms are, by volume, among the largest participants in modern index and currency futures markets. These firms run systematic strategies around the clock — including the small hours of the morning in any given time zone — because futures markets, unlike stock exchanges, trade nearly continuously across global sessions. A strategy reacting to an economic data release from Asia at 3am London time, or adjusting index futures exposure ahead of the US cash equity open, is operating in exactly the same contract structure the Chicago Board of Trade formalised in 1865 — just at a speed and scale no 19th-century farmer could have imagined.

What unites every one of these very different users is the original insight: futures let you fix a price today for something that will be settled later, transferring the risk of that price moving to whoever is willing to bear it. The sophistication of the participants has changed beyond recognition. The underlying mechanism has not changed at all.

How to Read a Futures Quote

Opening a futures trading platform for the first time can be disorienting, because contracts are labelled with a shorthand that looks nothing like a share ticker. A typical quote might read "ESZ5" or "CLZ25" — and decoding it is simpler than it looks. The first one or two letters identify the underlying contract (ES for the E-mini S&P 500, CL for WTI crude oil, GC for gold, ZW for wheat). The next letter is a standardised month code (F = January, G = February, H = March, and so on through to Z = December). The final digit or two identifies the year. So "ESZ5" is the E-mini S&P 500 contract expiring in December, and the year context (often a single digit, assumed to be the current decade) tells you which December.

Beyond the ticker itself, two further figures matter for understanding what a price move is actually worth: the tick size (the smallest price increment the contract can move, e.g. 0.25 index points for the E-mini) and the tick value (what that minimum move is worth in cash, e.g. $12.50 per tick on the E-mini, since each full index point is worth $50 and a tick is a quarter of a point). Multiplying the number of ticks a contract has moved by its tick value, and by the number of contracts held, gives the exact cash profit or loss — the same calculation, scaled up, that drives the daily mark-to-market settlement described earlier in this chapter.

How Retail Investors Actually Access Futures

Most retail investors who have "futures exposure" don't realise it, because they access it indirectly through commodity or index ETFs that hold futures contracts internally rather than the physical commodity itself. A popular oil ETF, for example, typically doesn't store barrels of crude — it holds a rolling position in oil futures, continuously closing the nearest expiring contract and opening the next one. If that market is in contango (next month's futures priced higher than this month's), the fund systematically sells low and buys high on every roll, creating a persistent drag on returns that can cause the ETF to underperform the actual spot price of oil over time, sometimes substantially, even when the headline commodity price is roughly flat over the period.

Direct futures trading is also available to retail investors through dedicated futures brokers, and the appeal is real: transparent exchange pricing, lower relative transaction costs than many other leveraged products, and genuine price discovery rather than a broker simply quoting you a price. The risk is equally real and has already been illustrated above — a single E-mini contract moves roughly $2,500 of profit or loss per 1% index move on a margin deposit that represents a small fraction of the contract's full notional value. Micro futures contracts, introduced by exchanges specifically to lower the barrier to entry, reduce this scale by a factor of ten, which makes direct futures somewhat more accessible to smaller accounts without changing the fundamental leverage dynamic.

A Full Worked Example: How a Margin Call Actually Unfolds

The theory of margin calls is easy to state and easy to underestimate. A worked numeric example makes the speed of the mechanic much more concrete. Suppose a trader opens one Micro E-mini S&P 500 contract, roughly one-tenth the notional size of the standard E-mini, representing about $25,000 of index exposure at a 5,000 index level. The exchange requires an initial margin deposit of roughly $1,500, and a maintenance margin of roughly $1,350 — the minimum balance that must be maintained once the position is open.

Notice what happened here: a single day's move of just 1% in the underlying index — a genuinely unremarkable daily move for a stock index — was enough to breach the maintenance margin threshold and trigger a same-day margin call, because the $25,000 notional position was controlled with only $1,500 of margin, a leverage ratio of roughly 16-to-1. An investor holding $25,000 of an index ETF outright would have simply seen their account value tick down by $250 and could comfortably wait for a recovery. The futures trader, by contrast, faces an immediate, forced decision: find more cash within hours, or have the position closed automatically, often locking in the loss right before a rebound that an unleveraged holder would have ridden out. This is the mechanical reality behind the much-repeated warning that leverage "destroys accounts" — not through any single catastrophic event, but through this exact sequence, repeated across enough adverse days that an account's margin cushion is eventually exhausted.

How Futures Are Taxed

Tax treatment of futures differs meaningfully between the UK and US, and the specific figures below should be treated as illustrative of the general framework rather than a permanently fixed number, since allowances and rates are set by policy and do change over time.

In the UK, profits from direct futures trading are generally subject to Capital Gains Tax in the same way as other investment gains, using the same annual tax-free allowance and rate structure that applies to shares and other assets. Spread bets referencing futures-style underlying assets are treated differently — UK spread betting is classed as gambling for tax purposes and profits are tax-free, though losses cannot be offset against other income or gains, which is the trade-off for that tax-free status.

In the US, many exchange-traded futures contracts fall under what's commonly called the "60/40 rule" (IRS Section 1256 contracts): 60% of any gain or loss is treated as long-term capital gain, and 40% as short-term, regardless of how long the contract was actually held — even a position opened and closed within the same day gets this blended treatment. This is a notably different and, for frequent traders, often more favourable regime than the treatment of short-term gains on shares, which in the US are typically taxed at ordinary income tax rates when held under a year.

Because tax treatment of derivatives is genuinely more complex than straightforward share ownership, and rules vary by jurisdiction and by the specific instrument used to gain futures exposure (direct futures, futures ETFs, or spread bets all have different treatments), this is one area where professional tax advice is particularly worth the cost before trading meaningfully, rather than assuming it works "the same as shares."

Record-keeping deserves a specific mention, because futures accounts generate a far higher volume of taxable events than a typical buy-and-hold share portfolio. Every contract rollover, every partial close, every daily mark-to-market adjustment can, depending on the jurisdiction and the specific tax treatment that applies, be a reportable event rather than something that only matters when the position is fully closed. Brokers that specialise in futures typically provide an annual realised gain and loss statement summarising this activity in the format tax authorities expect, and keeping that statement (along with your own trade log) is considerably easier than trying to reconstruct a year of daily settlements after the fact.

Futures vs Simply Buying the Asset: What You Give Up and What You Gain

It's worth being explicit about what changes when you choose a futures contract instead of simply buying the underlying asset outright, because the two routes to "exposure to gold" or "exposure to the S&P 500" look similar from a distance but behave very differently in practice.

The honest summary is that futures are a tool for managing or expressing a view on price risk over a defined period, not a substitute for long-term ownership. A pension saver building wealth over thirty years has very little practical use for an instrument that must be closed or rolled every few months and that converts every daily fluctuation into a realised cash flow. An airline hedging eighteen months of fuel purchases, or a trader expressing a short-term view on an index, is using the tool exactly as intended.

Why Futures Are Considered High Risk for Retail Accounts

Three features combine to make direct futures trading materially riskier than most retail investors initially appreciate. First, the leverage is substantial and largely fixed by contract design — you cannot simply choose to trade a contract with less leverage the way you might reduce position size with shares; the contract's notional value is set by the exchange, and your only real lever is how much margin cushion you keep above the minimum. Second, daily mark-to-market settlement means losses are realised in cash immediately, not just on paper, which removes the option of simply "waiting it out" that share investors often rely on during a downturn. Third, many futures markets can move sharply and quickly around scheduled data releases (interest rate decisions, inventory reports, harvest estimates), and because these markets often trade around the clock, a large adverse move can happen while a retail trader is asleep, with a margin call and forced liquidation waiting when they wake up.

None of this means futures are inherently illegitimate or that retail traders should never use them — they are a core, useful tool for the hedgers described earlier in this chapter, and some retail traders do use them skilfully with properly sized positions and strict risk controls. But the combination of fixed high leverage, forced daily settlement, and near-continuous trading hours is a genuinely different risk profile from buying and holding shares, and should be treated as such rather than assumed to be "just another way to get market exposure."

A further practical risk, often underestimated by newer traders, is gap risk: the possibility that the market moves sharply between one session's close and the next session's open, or during low-liquidity overnight hours, without any opportunity to exit at an intermediate price. Because many futures markets trade on a near-continuous global schedule, this risk is somewhat reduced compared to instruments that only trade during a single exchange's daytime hours — but scheduled news events (central bank interest rate decisions, non-farm payrolls, OPEC production announcements, surprise elections) can still produce moves of several percent within seconds, far faster than a stop-loss order can reliably protect against. A trader asleep when such an event occurs may simply find a materially different account balance, and a materially different open position, when they wake up.