A hedge is a futures position taken to offset a risk you already have — in a stock portfolio, in unsold inventory, in a planned purchase, or in a fuel bill — not a position taken solely because you expect the contract to rise or fall. The idea is simple: if the thing you already own falls in value, a short futures position may gain; if the thing you need to buy rises, a long futures position may gain. The hedge is not insurance with a fixed payout. It can be imperfect, it can require more margin while it is working, and it can show a futures loss when the other side of your business or portfolio is doing well.
This article explains the structure. It does not recommend a hedge ratio, a contract, or a holding period. Nothing here is a typical result.
What a hedge is — and what it is not
Speculation is a long or short position taken because you expect the futures price to move in your favor. Hedging uses the same contracts, the same margin, and the same last-trade dates, but the purpose is to offset a pre-existing exposure. If you do not have that exposure, calling a short “a hedge” does not make it one.
A hedge is also not a way to eliminate risk at no cost. If you short equity-index futures against a stock portfolio and the market rises, futures losses can offset some of the portfolio’s gain. You may have reduced variability, not created a free gain. Commissions, fees, bid-ask spreads, and margin all still apply. If the futures contract and the thing you are hedging do not move together, the offset can be incomplete, or can run the wrong way for a time. That gap is often called basis risk.
Long hedges and short hedges
A short hedge is a short futures position against something you already own or will receive. A common educational example is a stock portfolio that tends to move with the S&P 500, offset with a short E-mini or Micro E-mini S&P 500 (ES or MES) position. A producer who will sell a commodity later may similarly short the related futures contract. If prices fall, futures gains may offset some of the decline in the asset or inventory. If prices rise, futures losses may offset some of the increase.
A long hedge is a long futures position against something you need to buy later. A manufacturer who will need metal, or a firm that will need fuel, may buy the related contract so that a rise in the purchase price is offset, in part, by a gain on the futures. If prices fall, the futures side can show a loss while the later cash purchase becomes cheaper.
In both cases you still post margin, and you can be asked for more. A hedge that is “working” on paper can still produce a margin call on the futures account, because the futures side is collateralized separately from the portfolio, the inventory, or the planned purchase. See Margin and Leverage in Futures. You can lose more than you deposited on the futures side.
A labeled hypothetical (index)
Hypothetical hedge example (for illustration only — not a recommendation of size or strategy): Suppose a trader holds a $250,000 stock portfolio that they estimate moves roughly in line with the S&P 500. If ES is hypothetically at 5,000.00, one ES contract has a notional of 5,000 × $50 = $250,000. Shorting one ES would be a rough dollar hedge of that amount. If the index then fell 200 points (4% in this example), a portfolio that moved one-for-one with the index might decline by about $10,000, while the short ES position would gain 200 × $50 = $10,000, before costs. The same structure with ten MES contracts would have the same notional in this sketch. Real hedges are messier: portfolios do not move in lockstep with the index (a portfolio's beta often differs from one), dividends and basis appear, and the futures side can require more margin even when the offset is working as intended. This is a teaching sketch, not a playbook. Contract facts for ES and MES are in S&P 500 E-mini Futures (ES): A Practical Guide.
Other settings, including energy
The same structure appears in commodities. A metals position or a planned metals purchase might be compared with GC, MGC, or 1OZ, or with SI or SIL, depending on size and on whether the listing is deliverable or cash-settled. See Micro Gold, Micro Silver, and 1-Ounce Gold Futures. An energy exposure might be compared with CL or MCL; see Crude Oil Futures Basics. CL is deliverable at Cushing, Oklahoma. A hedge that is left into the notice and delivery window is no longer just a hedge; it can become a delivery obligation. Roll or close in time, as described in Contract Rollover, First Notice Day, and Last Trading Day.
Specialized cases can be more involved than a one-lot index example. Jet-fuel exposure for a flight department, for instance, is not a perfect one-for-one with WTI, and the contract months, liquidity, and accounting treatment all matter. This site’s earlier article Aviation Hedging: Jet Fuel for Corporate Flight Departments discusses that setting. It is not a recommendation to hedge, and it is not a substitute for advice from a qualified advisor who knows the firm’s actual exposure.
What a hedge does not fix
- Wrong size. A hedge that is much larger than the underlying exposure is, in the extra amount, a speculative position. A hedge that is much smaller offsets only part of the risk — which may be intended, but should be a choice, not a surprise.
- Wrong contract or wrong month. An equity portfolio does not always track the S&P 500. A fuel bill does not always track WTI at Cushing. The front month will expire; a hedge has to be rolled or closed like any other futures position.
- Stops and “sleep-well” exits. A stop on a hedge can take you out of the offset just as the underlying risk shows up. If you use stops, understand that they are not a guaranteed price. See Order Types and Stops.
- Tax and accounting treatment. Whether a futures result is treated as a hedge for tax or financial-reporting purposes is a fact-specific question. This article does not give tax or accounting advice. Consult a qualified tax professional and, if it applies, your accountant.
How to practice the mechanics
A simulated account will not reproduce basis risk in a live portfolio, but it is a reasonable place to see how a short index contract marks to market day by day, and how a roll looks when the front month is leaving the board.
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