For educational purposes only; not investment advice. Investing may result in loss.
Direct answer
A futures contract is a standardized, exchange-traded obligation whose gains and losses depend on the price of a specified commodity, financial instrument, rate, or index for a stated contract month. A clearing organization becomes the central counterparty, and open positions are settled to an exchange-determined settlement price through daily mark-to-market cash flows.
Equity-index futures provide index exposure without ownership or voting rights in the constituent companies. They require performance-bond margin rather than full payment of notional value. That capital efficiency is leverage: losses can exceed the initial margin, additional funds can be required quickly, and a broker or clearing firm can impose higher requirements or liquidate a position under its rules.
How it works
Analyze a futures position in this order:
- Read the exact contract specification. Identify the exchange, symbol, underlying reference, contract month, multiplier, quotation unit, minimum tick, trading and settlement hours, last trade date, position limits, settlement method, and delivery or final-settlement procedure. Similar names do not make contracts interchangeable.
- Translate price into exposure. For an index future,
notional = futures price × contract multiplier × number of contracts. One tick istick value = minimum price increment × multiplier × contracts. A long gains when the futures price rises and loses when it falls; a short has the opposite exposure. - Separate collateral from purchase price. Initial margin is a performance bond for opening the position. Maintenance margin is the minimum equity level under the applicable rules. Exchange, clearing, and broker or FCM requirements can differ, can change with risk and volatility, and can exceed published exchange minimums.
- Follow daily cash settlement. For a long position,
daily P&L = (new settlement - prior settlement) × multiplier × contracts; reverse the sign for a short. The exchange settlement price may differ from the final trade or quoted close. Gains are credited and losses debited; if account equity breaches the applicable threshold, funds may be demanded or positions reduced or liquidated. - Define the basis and return source. The CFTC convention is commonly
basis = spot price - futures price. Futures can differ from spot because of financing, expected distributions, storage or convenience yield, time, contract terms, and supply and demand. For an equity index, the quoted cash index is not itself a tradable portfolio, and futures P&L is not automatically the index’s total return. - Manage expiration deliberately. Before expiration, a trader can offset the position, roll by closing one contract month and opening another, or enter the contract’s settlement process. Rolling changes the contract and realizes the price relationship between months; it is not a free extension. Cash-settled contracts use a specified final reference, while physically settled contracts can create delivery obligations if not closed under the rules.
- Size a hedge to the risk. A simple equity-index approximation is
contracts to short = (β_current - β_target) × portfolio value / futures notional. Contract counts are discrete, beta and correlations change, and differences in constituents, currency, timing, dividends, and basis create tracking error. A hedge reduces a selected exposure; it does not remove every risk.
Near expiration, the futures contract converges to its specified settlement reference through the contract’s pricing and settlement process, but that does not mean futures and a spot proxy must be equal at every earlier time. A continuous futures chart also is not one investable contract: it joins different expiries and can conceal roll dates, price gaps, and methodology adjustments.
Example
Assume an illustrative equity-index future trades at 5,000, has a $50 multiplier and 0.25-point minimum tick, and requires $15,000 initial and $12,000 maintenance margin:
- Exposure and tick: one contract has
5,000 × $50 = $250,000notional and0.25 × $50 = $12.50tick value. The$15,000margin is6.0000%of notional, but it is not a loss limit. - Daily settlement: a long position settles first at
4,960, producing(4,960 - 5,000) × $50 = -$2,000and leaving$13,000. It then settles at4,935, producing another(4,935 - 4,960) × $50 = -$1,250and leaving$11,750, below maintenance. If the call restores equity to initial margin, the required deposit is$15,000 - $11,750 = $3,250. The1.3000%price decline created a$3,250loss, or21.6667%of initial margin. - Equity hedge: a
$5,000,000portfolio with1.2000beta and0.6000target beta needs(1.20 - 0.60) × $5,000,000 / $250,000 = 12contracts sold. If the index and futures both fall3.0000%, the futures gain is150 points × $50 × 12 = $90,000; the portfolio’s beta approximation loses$180,000, leaving a$90,000net loss, equal to the intended0.6000beta approximation before basis, costs, and model error. - Basis and roll: if the spot index is
5,000, the near future is5,020, and the next future is5,045, then spot-minus-near basis is5,000 - 5,020 = -20 pointsand the next-minus-near calendar spread is25 points. A long roll sells the near contract and buys the next at the prevailing prices. The25-pointgap describes the switch; by itself it is not the investor’s complete roll return or total return.
Risks
- Verify the exchange, product family, symbol, contract month, and exact underlying reference.
- Record the contract multiplier, quotation unit, minimum tick, tick value, and currency.
- Recalculate notional exposure rather than treating posted margin as position size.
- Distinguish exchange or clearing margin from broker or FCM house requirements.
- Record initial, maintenance, variation, and any intraday margin rules and their effective timestamps.
- Maintain liquidity for adverse daily cash flows; a profitable long-term thesis does not prevent near-term liquidation.
- Use official settlement prices for mark-to-market and do not substitute the last trade or visual chart close.
- Reconcile every daily credit, debit, deposit, withdrawal, fee, and position change in account equity.
- Stress gaps, limit moves, market closures, overnight sessions, and liquidation slippage beyond the initial margin.
- Confirm whether expiration produces physical delivery, cash settlement, or another specified procedure.
- Record first notice, last trade, final settlement, delivery, and broker-specific closeout deadlines where applicable.
- Treat offsetting, rolling, and settlement as different actions with different cash flows and operational risks.
- Compare near and deferred contract months; do not splice them into one price series without a documented roll method.
- Define basis sign explicitly and match the spot reference, timestamp, grade, location, currency, and contract month.
- Do not treat contango or backwardation alone as a guaranteed roll profit or loss.
- Separate futures price return, variation-margin cash flow, collateral return, roll effects, fees, and total portfolio return.
- For equity hedges, estimate beta, correlation, portfolio value, target exposure, and contract notional on matched timestamps.
- Round contract counts deliberately and measure under-hedge, over-hedge, constituent, dividend, currency, and basis risk.
- Check position limits, accountability levels, eligible collateral, concentration, counterparty chain, and tax treatment.
- Compare the strategy with cash holdings, ETFs, forwards, swaps, and options; payoff, funding, rights, and risks differ.
Common misconceptions
- “Futures margin is a down payment and the most that can be lost.” It is performance-bond collateral; losses and required deposits can exceed it.
- “A futures quote is the market’s guaranteed forecast of the future spot price.” Carry, distributions, contract terms, risk, and supply and demand affect the quote.
- “Rolling keeps the same contract alive at no cost.” A roll closes one expiry and opens another at two market prices, with spread, execution, and funding effects.
- “Futures and ETFs provide the same ownership and return.” Futures are derivative obligations with daily settlement and expiration; ETF shares are fund interests with their own assets, fees, and distributions.
- “A hedge eliminates loss.” It offsets a defined exposure approximately and can introduce basis, sizing, liquidity, margin, and opportunity costs.
Related topics
Sources
- CFTC: Economic Purpose of Futures Markets and How They Work.
- CFTC: Futures Glossary.
- CFTC: Futures Market Basics.
- CME Group: Mark-to-Market.
- CME Group: Hedging and Risk Management for Equity Index Futures.
- CME Group: Understanding Futures Expiration and Contract Roll.