Guide

Futures contracts explained

A Midwest grain elevator agrees today to sell 5,000 bushels of corn at $4.80 in December — not because anyone expects a handshake in a field, but because both sides want price certainty months ahead of harvest. That agreement, standardized and cleared through an exchange, is a futures contract: a legally binding obligation to buy or sell an asset at a set price on a fixed expiration date. Futures trade on everything from crude oil and gold to the S&P 500 and 10-year Treasury notes. They power commodity ETF roll mechanics, let airlines hedge jet fuel, and give speculators leveraged exposure without owning the underlying. This guide covers contract anatomy, margin and daily mark-to-market, contango and backwardation, hedging versus speculation, a Harbor Grain elevator worked example, an instrument decision table, common pitfalls, and an investor checklist. Crypto traders comparing dated CME Bitcoin futures to perpetual swaps should read both — the settlement and curve dynamics differ materially.

What a futures contract is

A future is an exchange-traded derivative: the buyer promises to purchase (and the seller promises to deliver) a standardized quantity of an underlying asset — or its cash equivalent — on a specified date. Unlike options, both parties are obligated to perform unless they close the position before expiry.

Standardization

Exchanges like CME, ICE, and Eurex define every detail so contracts are fungible:

Contract size — e.g., 100 troy ounces for gold, $50 times the S&P 500 index for ES mini futures, 1,000 barrels for WTI crude.
Tick size and value — the minimum price increment and its dollar impact per contract (ES ticks in 0.25 index points = $12.50).
Delivery month — quarterly or monthly expirations labeled Mar, Jun, Sep, Dec for many products.
Settlement — physical delivery (some commodities) or cash settlement (most equity index and many financial futures).

Standardization creates deep liquidity: a corn producer in Iowa and a speculator in Singapore trade the same December contract symbol.

Long vs short

Going long a future profits when the price rises; going short profits when it falls. Neither side pays the full notional upfront — they post margin (collateral) and settle gains or losses daily.

Margin and mark-to-market

Futures leverage comes from margin, not borrowed cash in the traditional sense. The exchange and clearinghouse require collateral to cover potential losses.

Initial and maintenance margin

Initial margin is the deposit to open a position — often 3–12% of notional for liquid contracts. Maintenance margin is the minimum balance that must remain; if equity falls below it, you receive a margin call and must add funds or the broker liquidates your position.

Daily mark-to-market

Every trading day, the clearinghouse settles P&L in cash. If you bought one ES contract at 5,200 and it closes at 5,210, $500 (10 points x $50) credits your account overnight — even though you still hold the position. Losses debit the same way. This daily reset prevents losses from silently compounding until expiry and is why futures accounts need liquid cash buffers beyond initial margin.

Notional exposure

A single ES contract at 5,200 controls roughly $260,000 of index exposure while margin might be $13,000. Small percentage moves create large dollar swings — the leverage that attracts speculators also magnifies drawdowns.

Major futures categories

Commodity futures

Energy (WTI, Brent, natural gas), metals (gold, copper), agriculture (corn, wheat, soybeans, cattle), and softs (coffee, sugar). Physical delivery exists for some grades, but most financial participants close or roll before delivery. Storage costs and seasonal supply drive curve shape — central to commodity investing via ETFs.

Financial / equity index futures

S&P 500 (ES), Nasdaq-100 (NQ), Russell 2000 (RTY), and international indices. Cash-settled against a final settlement price on expiration. Portfolio managers use them for beta adjustment — sell ES to reduce equity exposure without selling every stock.

Interest rate and bond futures

Treasury notes and bonds, Eurodollar/SOFR strips, and short-term rate contracts. Prices move inversely to yields. Hedgers with fixed-income portfolios use them to manage duration risk when rates shift.

Currency futures

Standardized FX pairs (EUR/USD, JPY/USD) traded on CME. Multinationals hedge translation exposure; speculators express macro views with defined expiry.

Contango, backwardation, and roll yield

Futures with different expirations trade at different prices simultaneously. Plotting those prices creates the futures curve.

Contango

When later-dated contracts trade above nearer ones, the curve slopes upward — contango. Common in storable commodities when inventory is ample and storage costs are priced in. Holding long exposure requires rolling from an expiring contract to the next month; if the next month costs more, you pay the difference — negative roll yield. Contango is why long-only commodity ETFs can lag spot over years even when spot rises.

Backwardation

When near contracts trade above deferred ones, the curve is inverted — backwardation. Often appears during supply shocks (oil spikes, droughts) when immediate delivery commands a premium. Rolling in backwardation can add positive roll yield to long holders.

Basis

The basis is the spot price minus the futures price (sign conventions vary by market). Basis converges toward zero at expiration as futures and spot must align. Hedgers watch basis to judge whether locking in via futures beats waiting for the cash market.

Hedging vs speculation

Hedgers

Commercial users transfer price risk to speculators. A farmer shorting corn futures locks a selling price before harvest; if cash corn falls, futures gains offset. An airline buying crude futures caps fuel cost. The hedge is imperfect — basis risk remains if the local cash price diverges from the benchmark future.

Speculators

Non-commercial traders provide liquidity and absorb risk in exchange for profit potential. Regulators (CFTC Commitments of Traders reports) track commercial vs non-commercial positioning. Speculators rarely take delivery — they flatten or roll before expiry.

Spread trading

Trading the price difference between two related contracts — e.g., long March corn / short December corn — reduces outright directional exposure and focuses on curve shape or seasonal relationships.

Worked example: Harbor Grain elevator

Harbor Grain operates a regional elevator. On June 1, cash corn trades at $4.65/bushel. December corn futures (CME ZC) settle at $4.82 — a 17-cent contango reflecting storage and carry. The elevator expects to accumulate 250,000 bushels by October for sale to exporters.

Hedge: The manager sells 50 December contracts (5,000 bu each = 250,000 bu) at $4.82, locking that price minus basis. Margin per contract might be ~$1,500; total collateral ~$75,000 against ~$1.2M notional.

Scenario A — harvest glut: By November, cash corn falls to $4.20 and December futures to $4.35. The elevator loses 45 cents/bushel on physical inventory ($112,500) but gains 47 cents on futures ($117,500) before fees — roughly flat on price, which was the goal.

Scenario B — drought rally: Cash rises to $5.40; futures to $5.55. Physical inventory gains 75 cents/bushel, but the short futures lose 73 cents — again, price locked. The elevator gave up upside to eliminate downside — classic hedging trade-off.

Without the hedge: Scenario A improves cash margins if input costs fall elsewhere; Scenario B delivers windfall profits. The CFO chose certainty over optionality because debt covenants require predictable revenue.

Instrument decision table

Goal	Instrument	Why
Lock crop sale price months ahead	Short commodity future	Obligation matches physical exposure; daily MTM cash flow
Long-term commodity exposure without roll management	Commodity ETF or ETN	Fund handles rolls; accept tracking error vs spot
Defined-risk bullish bet on index	Call option on index ETF	Max loss = premium; no margin calls
Efficient beta tilt on large portfolio	Equity index future (ES/NQ)	Capital-efficient; single line adjusts exposure
Crypto leverage without expiry	Perpetual future	No roll; funding rate anchors to spot
Hedge rising rates on bond portfolio	Short Treasury note future	Duration offset without selling bonds

Common pitfalls

Underestimating leverage — a 2% adverse move on ES can wipe a large fraction of posted margin.
Ignoring roll costs — long commodity futures in persistent contango bleed via negative roll yield.
Basis mismatch — hedging local wheat with Chicago wheat futures leaves regional basis unprotected.
Delivery surprise — failing to close or roll a physically settled contract can result in a warehouse receipt you cannot use.
Margin call at the worst time — mark-to-market debits during volatility spikes force liquidation at lows.
Confusing perps with dated futures — funding rates and no-expiry mechanics differ from CME-style curves.

Investor checklist

Read the contract spec sheet: size, tick, hours, last trading day, settlement method.
Size margin buffer beyond initial requirement — plan for multiple adverse MTM days.
Map hedges to actual exposure (bushels, barrels, index beta) — not rough guesses.
Check the futures curve before rolling — contango vs backwardation drives carry.
Compare futures vs ETFs vs options for the same macro view — capital efficiency differs.
Track COT positioning for sentiment context, not as a timing signal alone.
Paper-trade or use micro contracts (MES, MGC) before full-size notional.

Key takeaways

Futures are standardized, margined obligations with fixed expirations — unlike options, both sides must perform or close.
Daily mark-to-market settles P&L in cash; leverage cuts both ways.
Curve shape (contango/backwardation) determines roll yield for passive long exposure.
Hedgers sacrifice upside for price certainty; speculators provide liquidity and absorb risk.
Pair dated futures literacy with perpetual futures knowledge if you trade crypto derivatives.